CN114458215B - Pressure-resistant large-size tail pipe hanger and use method thereof - Google Patents
Pressure-resistant large-size tail pipe hanger and use method thereof Download PDFInfo
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- CN114458215B CN114458215B CN202011299617.XA CN202011299617A CN114458215B CN 114458215 B CN114458215 B CN 114458215B CN 202011299617 A CN202011299617 A CN 202011299617A CN 114458215 B CN114458215 B CN 114458215B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 210000002445 nipple Anatomy 0.000 claims description 86
- 239000000725 suspension Substances 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 31
- 238000011084 recovery Methods 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 15
- 238000011990 functional testing Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Mining & Mineral Resources (AREA)
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a pressure-resistant large-size tail pipe hanger and a use method thereof. The invention can be singly or even multiply connected in series on the large-size sleeve to increase the number of layers of one or even more layers of the sleeve, solves the problems that the conventional well structure is difficult to cope with the complex underground geological structure and narrow operation window during the operation of the high-temperature high-pressure well and the ultra-deep well, and can also bear the high-pressure operation environment at the bottom of the well.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas drilling equipment, in particular to a pressure-resistant large-size tail pipe hanger and a use method thereof.
Background
At present, the conventional well structure comprises 4 layers or 5 layers of casings, when a high-temperature high-pressure well and an ultra-deep well with complex geological conditions and less temporary well data are encountered, a large-size tail pipe hanger is used, so that great freedom degree can be provided for the development of oil and gas fields, and the operation difficulty and the operation risk are greatly reduced.
Disclosure of Invention
The invention overcomes the defects in the prior art, provides a pressure-resistant large-size tail pipe hanger and a use method thereof, can be singly or even multiply connected on a large-size sleeve, is used for increasing the number of layers of one or even more layers of the sleeve, solves the problems that the conventional well structure is difficult to cope with the complex underground geological structure and narrow operation window during the operation of a high-temperature high-pressure well and an ultra-deep well, and can also bear the operation environment of high bottom pressure.
The aim of the invention is achieved by the following technical scheme.
The utility model provides a withstand voltage type jumbo size tail pipe is hung, includes hangs nipple joint, body, split type carrier ring and actuating ring, hang the nipple joint and adopt hollow cylindric structure, the body passes through split type carrier ring installs hang the internal surface of nipple joint, the body adopts hollow cylindric structure the split type carrier ring is installed on the body outer wall of split type carrier ring top split type carrier ring is used for transmitting the load split type carrier ring top the stop device is installed on the outer wall of body, and stop device is used for restricting the body and hangs the removal between the nipple joint the split type carrier ring below install the actuating ring on the body outer wall of split type carrier ring, the actuating ring pass through the shear pin with the outer wall of body links to each other, and after the service tool who links to each other with the body receives decurrent effect, the actuating ring moves down and contacts the actuating pin that sets up on hanging the nipple joint inner wall, and when the actuating ring removes for connecting the safety pin of actuating ring and body, the split type carrier ring moves down along with the body, and the split type carrier ring is used for transmitting load with the guide ring piece that sets up on the body outer wall, and the split type carrier ring contacts the guide ring, and hangs the annular ring, and the annular groove is also offered to the expansion joint after the opening is deformed in the expansion joint, and is connected to the inner wall of expansion joint in the expansion joint at the inner wall of nipple joint, and expansion joint is realized.
The inner wall upper portion that hangs the nipple joint forms a nipple joint sealed face, the first end of nipple joint sealed face is offered and is used for the body to lead right the inclined plane offer in the middle part of nipple joint sealed face be used for carrying out spacing sealed assembly spacing groove to sealed assembly the tail end of nipple joint sealed face is offered and is used for cooperating and carry out spacing body spacing groove to the body with stop device, offered on the inner wall that hangs the nipple joint sealed face below be used for with the cooperation of split lock ring and can hang the split lock annular of body the inner wall lower part that hangs the nipple joint is provided with the driving pin that is used for driving the driving ring.
The number of the driving pins is 3, the 3 driving pins are unevenly distributed on the lower portion of the inner wall of the suspension nipple, and the gaps between the adjacent driving pins can allow the blades of the five-blade diamond bit and the six-blade diamond bit to pass through.
The inner surface of the body forms a body sealing surface, the head end of the body sealing surface is uniformly provided with an anti-rotation pin groove matched with an anti-rotation pin of a service tool, the body sealing surface below the anti-rotation pin groove is provided with a service tool lock ring groove matched with a lock ring of the service tool, the upper part of the outer wall of the body forms a sealing assembly sealing surface matched with a sealing assembly, the outer wall of the body below the sealing assembly sealing surface is provided with a well cementation circulating groove for well cementation circulation, the lower surface of the well cementation circulating groove below a mounting hole of the limiting device forms a bearing inclined surface, the bearing inclined surface is matched with a split bearing ring to realize the purpose of transferring load, a guide circulating block is arranged on the outer wall of the body below the well cementation circulating groove, and a safety pin hole for installing a safety pin is formed on the outer wall of the body below the guide circulating block.
The upper surface of split type carrier ring forms a slope with carrier slope matched with the upper portion of split type carrier ring has seted up the circulation hole that is used for well cementation circulation that runs through split type carrier ring lateral wall the circulation hole below set up inside circulation groove on the inner wall of split type carrier ring the outside circulation groove has been seted up on the outer wall of split type carrier ring of circulation hole top.
The inner wall of the split lock ring forms an expansion contact surface for contacting the guide circulation block, and the outer wall of the split lock ring forms a lock ring surface for matching with the split lock ring groove.
And safety pin threaded holes for installing safety pins are uniformly formed in the outer wall of the driving ring, and penetrate through the outer wall of the driving ring.
The application method of the pressure-resistant large-size tail pipe hanger comprises the following steps:
step 1, pre-installing a suspension nipple and an outer casing string:
welding the two ends of the suspension nipple with the outer casing in a welding workshop, and connecting the outer casing with the suspension nipple with the outer casing string after the outer casing welded with the suspension nipple is transported to a drill floor to obtain the outer casing provided with the suspension nipple and the outer casing string, and installing the outer casing with the suspension nipple and the outer casing string on the sea floor by using a piling method, a drilling well cementation method or a jet drilling method;
step 2, installing a body and an inner casing string of the service tool:
welding a body on a horizontally placed inner sleeve in a welding workshop, welding the body and one end of the inner sleeve, installing a split bearing ring, a limiting device and an opening locking ring on the outer wall of the body, transporting the inner sleeve welded with the body to a drill floor, connecting the inner sleeve welded with the body with an inner sleeve string with a required length, sitting on a slip on the surface of a turntable, penetrating a service tool and an inner tube string into the body, rotating the service tool to lock the service tool locking ring groove on the service tool, connecting a drill rod to the service tool, conveying the service tool, the body and the inner sleeve string above a suspension nipple by using the drill rod, adjusting the height of the service tool, sitting the body on the suspension nipple, releasing a certain weight, downwards moving the driving ring to contact a driving pin, connecting a safety pin with the body and the driving ring to have a temporary connection effect, enabling the opening locking ring to be in contact with a guide circulation block, enabling the opening locking ring to expand and deform, embedding the limiting device into the body limiting groove, and further lifting a certain force to confirm that the body is connected with the suspension nipple, rotating the service tool to separate the service tool from the suspension nipple, and carrying out circulation operation on the service tool and the drill pipe string, and recovering the service tool according to the operation of the well cementing operation;
step 3, recovering large-size tail pipe hanging:
after the operation is completed, the wellhead is required to be cut and recovered, when the depth of the hanging nipple exceeds 4 meters below the mud surface, only the outer casing above the hanging nipple is required to be recovered, and when the working water depth exceeds 800 meters, the casing can not be recovered.
In step 3, the recovery mode of the large-size tail pipe hanger is a one-pass recovery large-size tail pipe hanger mode, a staged recovery large-size tail pipe hanger mode and a recovery only outer sleeve mode:
mode one, one-pass recovery large-size tail pipe hanging mode:
connecting a large-size hydraulic cutter capable of cutting 2 layers or more than 2 layers of casings on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, cutting the casings by a preset cutting depth below a body, recovering the drill rod and the hydraulic cutter to the drill floor after the outermost casing is cut off, then lowering a large-size casing fishing spear for fishing the outermost casing, connecting the drill rod, conveying the large-size casing fishing spear to a designated working depth, fishing the outermost casing, and recovering the drill rod, the large-size casing fishing spear, the outermost casing welded with a suspension nipple and the inner casing welded with the body to the drill floor;
mode two, recycling large-size tail pipe hanging mode in stages:
firstly, connecting a hydraulic cutter capable of cutting a 1-layer inner-layer sleeve on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, delivering the hydraulic cutter to a preset cutting depth below a body, cutting the inner-layer sleeve, recovering the drill rod and the hydraulic cutter to the drill floor after the inner-layer sleeve is cut off, then, lowering a sleeve fishing spear for fishing the inner-layer sleeve, connecting the drill rod, delivering the sleeve fishing spear to a designated working depth, fishing the inner-layer sleeve, and recovering the drill rod, the sleeve fishing spear and the inner-layer sleeve welded with the body to the drill floor;
then, connecting a hydraulic cutter capable of cutting the outer-layer sleeve of the layer 1 on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, delivering the hydraulic cutter to a preset cutting depth, cutting the outer-layer sleeve, recovering the drill rod and the hydraulic cutter to the drill floor after the outer-layer sleeve is cut off, then lowering a large-size sleeve fishing spear for fishing the outer-layer sleeve, connecting the drill rod, delivering the large-size sleeve fishing spear to a designated operation depth, fishing the outer-layer sleeve, and recovering the drill rod, the large-size sleeve fishing spear and the outer-layer sleeve to the drill floor;
mode three, only retrieve the outer casing:
the hydraulic cutting knife capable of cutting the outer-layer sleeve of the 1 layer is connected to the drill floor, the hydraulic cutting knife is subjected to functional test, the drill rod is connected to the hydraulic cutting knife, the hydraulic cutting knife is fed to a preset cutting depth, the outer-layer sleeve is cut, after the outer-layer sleeve is cut off, the drill rod and the hydraulic cutting knife are recovered to the drill floor, then the large-size sleeve fishing spear used for fishing the outer-layer sleeve is put into the drill floor, the drill rod is connected, the large-size sleeve fishing spear is sent to a designated operation depth, the outer-layer sleeve is fished, and the drill rod, the large-size sleeve fishing spear and the outer-layer sleeve are recovered to the drill floor.
The beneficial effects of the invention are as follows: the invention can be used for increasing the number of layers of one or even more layers of sleeve pipes, reducing the operation difficulty of high-temperature high-pressure wells and ultra-deep wells and increasing the adaptability of underwater wellheads; the suspension nipple is directly welded on the casing, the installation position is flexible, and the adaptability is strong; the invention has simple structure and less parts; in the recovery process, the common fishing tool is used for fishing the sleeve connected below the body, and the sleeve is recovered through the lifting and cutting limiting device, so that the operation is simple, the operation tool and the process are mature, and the reliability is high; the invention can bear the high-pressure working environment at the bottom of the well.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of the construction of a suspension sub of the present invention;
FIG. 3 is a diagram showing the relative positions of the drive pins and the profile lines of a five-blade drill bit according to the present invention;
FIG. 4 is a diagram showing the relative positions of the drive pins and six-blade bit contours in accordance with the present invention;
FIG. 5 is a superimposed view of the relative positions of the drive pins and the five-blade bit contours and the six-blade bit contours of the present invention;
FIG. 6 is a schematic view of the structure of the body of the present invention;
FIG. 7 is a schematic view of a split load ring of the present invention;
FIG. 8 is a schematic view of the split locking ring of the present invention;
FIG. 9 is a schematic view of the structure of the drive ring of the present invention;
in the figure: 1 is a suspension nipple, 101 is a centralizing inclined plane, 102 is a seal assembly limit groove, 103 is a nipple seal surface, 104 is a body limit groove, 105 is an open lock ring groove, 106 is a driving pin, 2 is a body, 207 is an anti-rotation pin groove, 208 is a body seal surface, 209 is a service tool lock ring groove, 210 is a seal assembly seal surface, 211 is a positioning device mounting hole, 212 is a bearing inclined plane, 213 is a well cementation circulation groove, 214 is a guide circulation block, 215 is a safety pin hole, 3 is a positioning device, 4 is a split bearing ring, 416 is an inclined plane, 417 is a circulation hole, 418 is an internal circulation groove, 419 is an external circulation groove, 5 is an open lock ring, 520 is an expansion contact surface, 521 is a lock ring surface, 6 is a driving ring, 622 is a safety pin threaded hole, and 7 is a safety pin.
Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.
Detailed Description
The technical scheme of the invention is further described by specific examples.
Example 1
The utility model provides a withstand voltage type jumbo size tail pipe is hung, including hanging nipple 1, body 2, split type carrier ring 4, split type carrier ring 5 and actuating ring 6, hang nipple 1 and adopt the cavity cylindric structure, body 2 adopts cavity cylindric structure, body 2 passes through split type carrier ring 4 of installation on the body 2 outer wall of split type carrier ring 5 top, split type carrier ring 4 is used for transmitting the load, install stop device 3 on the outer wall of body of split type carrier ring 4 top, stop device 3 is used for restricting the removal between body 2 and hanging nipple 1, install actuating ring 6 on the body 2 outer wall of split type carrier ring 5 below, actuating ring 6 links to each other with the outer wall of body 2 through the relief pin 7, after the service tool who links to each other with body 2 receives decurrent effect, actuating ring 6 moves down and contacts the actuating pin 106 that sets up on hanging nipple 1 inner wall, be used for connecting actuating ring 6 and body 2's relief pin 7 inefficacy, split type carrier ring 5 moves down along with body 1, split type carrier ring 5 sets up guide ring 2 on split type carrier ring 5 and hangs ring 2 on the guide ring 2, set up at the same time in-time annular groove 104 is hung in body 2 with opening nipple 2, the annular groove 2 is hung in the annular groove 2, the expansion device is realized to hang nipple 1, the annular groove is embedded in body 1 is realized to the expansion joint 1 after opening nipple 2.
Example two
On the basis of the first embodiment, a nipple sealing surface 103 is formed on the upper portion of the inner wall of the suspension nipple 1, a centralizing inclined surface 101 for guiding the body 2 is formed at the head end of the nipple sealing surface 103, a sealing assembly limiting groove 102 for limiting a sealing assembly is formed in the middle of the nipple sealing surface 103, a body limiting groove 104 for being matched with the limiting device 3 and limiting the body 2 is formed at the tail end of the nipple sealing surface 103, an opening locking ring groove 105 for being matched with the opening locking ring 5 and capable of suspending the body 2 is formed on the inner wall of the suspension nipple 1 below the nipple sealing surface 103, and a driving pin 106 for driving the driving ring 6 is arranged on the lower portion of the inner wall of the suspension nipple 1.
The number of the driving pins 106 is 3, the 3 driving pins 106 are unevenly distributed at the lower part of the inner wall of the suspension nipple 1, and the gaps between the adjacent driving pins 106 can allow the blades of the five-blade diamond bit and the six-blade diamond bit to pass through.
The inner surface of the body 2 forms a body sealing surface 208, an anti-rotation pin groove 207 for matching with an anti-rotation pin of a service tool is uniformly formed at the head end of the body sealing surface 208, a service tool locking ring groove 209 for matching with a locking ring of the service tool is formed on the body sealing surface 208 below the anti-rotation pin groove 207, a sealing assembly sealing surface 210 for matching with a sealing assembly is formed at the upper part of the outer wall of the body 2, a well cementation circulating groove 213 for well cementation circulation is formed on the outer wall of the body 2 below the sealing assembly sealing surface 210, a bearing inclined plane 212 is formed on the lower surface of the well cementation circulating groove 213 below the limiting device mounting hole 211, the bearing inclined plane 212 is used for matching with a split bearing ring 4 to achieve the purpose of transferring load, a guiding circulating block 214 is arranged on the outer wall of the body 2 below the well cementation circulating groove 213, and a safety pin hole 215 for mounting a safety pin 7 is formed on the outer wall of the body 2 below the guiding circulating block 214.
Example III
On the basis of the second embodiment, an inclined plane 416 matched with the bearing inclined plane 212 is formed on the upper surface of the split bearing ring 4, a circulation hole 417 penetrating through the side wall of the split bearing ring 4 and used for well cementation circulation is formed on the upper portion of the split bearing ring 4, an internal circulation groove 418 is formed on the inner wall of the split bearing ring 4 below the circulation hole 417, and an external circulation groove 419 is formed on the outer wall of the split bearing ring 4 above the circulation hole 417.
The inner wall of the split lock ring 5 forms an expanding contact surface 520 for contact with the guide circulation block 214 and the outer wall of the split lock ring 5 forms a lock ring surface 521 for mating with the split lock ring groove 105.
The outer wall of the driving ring 6 is uniformly provided with a safety pin threaded hole 622 for installing the safety pin 7, and the safety pin threaded hole 622 penetrates through the outer wall of the driving ring 6.
Example IV
The application method of the pressure-resistant large-size tail pipe hanger comprises the following steps:
step 1, pre-installing a suspension nipple and an outer casing string:
welding the two ends of the suspension nipple with the outer casing in a welding workshop, and connecting the outer casing with the suspension nipple with the outer casing string after the outer casing welded with the suspension nipple is transported to a drill floor to obtain the outer casing provided with the suspension nipple and the outer casing string, and installing the outer casing with the suspension nipple and the outer casing string on the sea floor by using a piling method, a drilling well cementation method or a jet drilling method;
step 2, installing a body and an inner casing string of the service tool:
welding a body on a horizontally placed inner sleeve in a welding workshop, welding the body and one end of the inner sleeve, installing a split bearing ring, a limiting device and an opening locking ring on the outer wall of the body, transporting the inner sleeve welded with the body to a drill floor, connecting the inner sleeve welded with the body with an inner sleeve string with a required length, sitting on a slip on the surface of a turntable, penetrating a service tool and an inner tube string into the body, rotating the service tool to lock the service tool locking ring groove on the service tool, connecting a drill rod to the service tool, conveying the service tool, the body and the inner sleeve string above a suspension nipple by using the drill rod, adjusting the height of the service tool, sitting the body on the suspension nipple, releasing a certain weight, downwards moving the driving ring to contact a driving pin, connecting a safety pin with the body and the driving ring to have a temporary connection effect, enabling the opening locking ring to be in contact with a guide circulation block, enabling the opening locking ring to expand and deform, embedding the limiting device into the body limiting groove, and further lifting a certain force to confirm that the body is connected with the suspension nipple, rotating the service tool to separate the service tool from the suspension nipple, and carrying out circulation operation on the service tool and the drill pipe string, and recovering the service tool according to the operation of the well cementing operation;
step 3, recovering large-size tail pipe hanging:
after the operation is completed, the wellhead is required to be cut and recovered, when the depth of the hanging nipple exceeds 4 meters below the mud surface, only the outer casing above the hanging nipple is required to be recovered, and when the working water depth exceeds 800 meters, the casing can not be recovered.
In step 3, the recovery mode of the large-size tail pipe hanger is a one-pass recovery large-size tail pipe hanger mode, a staged recovery large-size tail pipe hanger mode and a recovery only outer sleeve mode:
mode one, one-pass recovery large-size tail pipe hanging mode:
connecting a large-size hydraulic cutter capable of cutting 2 layers or more than 2 layers of casings on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, cutting the casings by a preset cutting depth below a body, recovering the drill rod and the hydraulic cutter to the drill floor after the outermost casing is cut off, then lowering a large-size casing fishing spear for fishing the outermost casing, connecting the drill rod, conveying the large-size casing fishing spear to a designated working depth, fishing the outermost casing, and recovering the drill rod, the large-size casing fishing spear, the outermost casing welded with a suspension nipple and the inner casing welded with the body to the drill floor;
mode two, recycling large-size tail pipe hanging mode in stages:
firstly, connecting a hydraulic cutter capable of cutting a 1-layer inner-layer sleeve on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, delivering the hydraulic cutter to a preset cutting depth below a body, cutting the inner-layer sleeve, recovering the drill rod and the hydraulic cutter to the drill floor after the inner-layer sleeve is cut off, then, lowering a sleeve fishing spear for fishing the inner-layer sleeve, connecting the drill rod, delivering the sleeve fishing spear to a designated working depth, fishing the inner-layer sleeve, and recovering the drill rod, the sleeve fishing spear and the inner-layer sleeve welded with the body to the drill floor;
then, connecting a hydraulic cutter capable of cutting the outer-layer sleeve of the layer 1 on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, delivering the hydraulic cutter to a preset cutting depth, cutting the outer-layer sleeve, recovering the drill rod and the hydraulic cutter to the drill floor after the outer-layer sleeve is cut off, then lowering a large-size sleeve fishing spear for fishing the outer-layer sleeve, connecting the drill rod, delivering the large-size sleeve fishing spear to a designated operation depth, fishing the outer-layer sleeve, and recovering the drill rod, the large-size sleeve fishing spear and the outer-layer sleeve to the drill floor;
mode three, only retrieve the outer casing:
the hydraulic cutting knife capable of cutting the outer-layer sleeve of the 1 layer is connected to the drill floor, the hydraulic cutting knife is subjected to functional test, the drill rod is connected to the hydraulic cutting knife, the hydraulic cutting knife is fed to a preset cutting depth, the outer-layer sleeve is cut, after the outer-layer sleeve is cut off, the drill rod and the hydraulic cutting knife are recovered to the drill floor, then the large-size sleeve fishing spear used for fishing the outer-layer sleeve is put into the drill floor, the drill rod is connected, the large-size sleeve fishing spear is sent to a designated operation depth, the outer-layer sleeve is fished, and the drill rod, the large-size sleeve fishing spear and the outer-layer sleeve are recovered to the drill floor.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise positioned (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (10)
1. A withstand voltage type jumbo size tail pipe string, its characterized in that: including hanging nipple joint, body, split type carrier ring, split type catch and actuating ring, hang the nipple joint and adopt cavity cylindric structure, the body passes through the catch is installed hang the internal surface of nipple joint, the body adopts cavity cylindric structure the catch top install on the body outer wall split type carrier ring, split type carrier ring is used for transmitting the load the stop device is installed on the outer wall of body above split type carrier ring, stop device is used for restricting the body and hangs the removal between the nipple joint the catch below install the actuating ring on the body outer wall of catch, the actuating ring pass through the shear pin with the service tool that links to each other of body receives decurrent effect after the actuating ring moves down and contacts the actuating pin that sets up on hanging the nipple joint inner wall, and when the actuating ring moves for connecting the locating ring and the body down moves, the catch contacts with the guide circulation piece that sets up on the body outer wall for after the catch expansion deformation, the catch is hung the annular groove with the body in the setting up on the body, the annular groove is hung to the realization at the same time hung in the nipple joint.
2. The pressure-resistant large-size tail pipe hanger of claim 1, wherein: the inner wall upper portion that hangs the nipple joint forms a nipple joint sealed face, the first end of nipple joint sealed face is offered and is used for the body to lead right the inclined plane offer in the middle part of nipple joint sealed face be used for carrying out spacing sealed assembly spacing groove to sealed assembly the tail end of nipple joint sealed face is offered and is used for cooperating and carry out spacing body spacing groove to the body with stop device, offered on the inner wall that hangs the nipple joint sealed face below be used for with the cooperation of split lock ring and can hang the split lock annular of body the inner wall lower part that hangs the nipple joint is provided with the driving pin that is used for driving the driving ring.
3. The pressure-resistant large-size tail pipe hanger of claim 2, wherein: the number of the driving pins is 3, the 3 driving pins are unevenly distributed on the lower portion of the inner wall of the suspension nipple, and the gaps between the adjacent driving pins can allow the blades of the five-blade diamond bit and the six-blade diamond bit to pass through.
4. The pressure-resistant large-size tail pipe hanger of claim 2, wherein: the inner surface of the body forms a body sealing surface, the head end of the body sealing surface is uniformly provided with an anti-rotation pin groove matched with an anti-rotation pin of a service tool, the body sealing surface below the anti-rotation pin groove is provided with a service tool lock ring groove matched with a lock ring of the service tool, the upper part of the outer wall of the body forms a sealing assembly sealing surface matched with a sealing assembly, the outer wall of the body below the sealing assembly sealing surface is provided with a well cementation circulating groove for well cementation circulation, the lower surface of the well cementation circulating groove below a mounting hole of the limiting device forms a bearing inclined surface, the bearing inclined surface is matched with a split bearing ring to realize the purpose of transferring load, a guide circulating block is arranged on the outer wall of the body below the well cementation circulating groove, and a safety pin hole for installing a safety pin is formed on the outer wall of the body below the guide circulating block.
5. The pressure resistant large size tail pipe hanger of claim 4, wherein: the upper surface of split type carrier ring forms a slope with carrier slope matched with the upper portion of split type carrier ring has seted up the circulation hole that is used for well cementation circulation that runs through split type carrier ring lateral wall the circulation hole below set up inside circulation groove on the inner wall of split type carrier ring the outside circulation groove has been seted up on the outer wall of split type carrier ring of circulation hole top.
6. The pressure-resistant large-size tail pipe hanger of claim 5, wherein: the inner wall of the split lock ring forms an expansion contact surface for contacting the guide circulation block, and the outer wall of the split lock ring forms a lock ring surface for matching with the split lock ring groove.
7. The pressure-resistant large-size tail pipe hanger of claim 6, wherein: and safety pin threaded holes for installing safety pins are uniformly formed in the outer wall of the driving ring, and penetrate through the outer wall of the driving ring.
8. A method of using the pressure-resistant large-size tail pipe hanger as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps of:
step 1, pre-installing a suspension nipple and an outer casing string:
welding the two ends of the suspension nipple with the outer casing in a welding workshop, and connecting the outer casing with the suspension nipple with the outer casing string after the outer casing welded with the suspension nipple is transported to a drill floor to obtain the outer casing provided with the suspension nipple and the outer casing string, and installing the outer casing with the suspension nipple and the outer casing string on the sea floor by using a piling method, a drilling well cementation method or a jet drilling method;
step 2, installing a body and an inner casing string of the service tool:
welding a body on a horizontally placed inner sleeve in a welding workshop, welding the body and one end of the inner sleeve, installing a split bearing ring, a limiting device and an opening locking ring on the outer wall of the body, transporting the inner sleeve welded with the body to a drill floor, connecting the inner sleeve welded with the body with an inner sleeve string with a required length, sitting on a slip on the surface of a turntable, penetrating a service tool and an inner tube string into the body, rotating the service tool to lock the service tool locking ring groove on the service tool, connecting a drill rod to the service tool, conveying the service tool, the body and the inner sleeve string above a suspension nipple by using the drill rod, adjusting the height of the service tool, sitting the body on the suspension nipple, releasing a certain weight, downwards moving the driving ring to contact a driving pin, connecting a safety pin with the body and the driving ring to have a temporary connection effect, enabling the opening locking ring to be in contact with a guide circulation block, enabling the opening locking ring to expand and deform, embedding the limiting device into the body limiting groove, and further lifting a certain force to confirm that the body is connected with the suspension nipple, rotating the service tool to separate the service tool from the suspension nipple, and carrying out circulation operation on the service tool and the drill pipe string, and recovering the service tool according to the operation of the well cementing operation;
step 3, recovering large-size tail pipe hanging:
after the operation is completed, the wellhead is required to be cut and recovered, when the depth of the hanging nipple exceeds 4 meters below the mud surface, only the outer casing above the hanging nipple is required to be recovered, and when the working water depth exceeds 800 meters, the casing can not be recovered.
9. The method for using the pressure-resistant large-size tail pipe hanger according to claim 8, wherein the method comprises the following steps: in step 3, the recovery mode of the large-size tail pipe hanger is a one-pass recovery large-size tail pipe hanger mode, a staged recovery large-size tail pipe hanger mode and a recovery only outer sleeve mode.
10. The method for using the pressure-resistant large-size tail pipe hanger according to claim 9, wherein the method comprises the following steps:
mode one, one-pass recovery large-size tail pipe hanging mode:
connecting a large-size hydraulic cutter capable of cutting 2 layers or more than 2 layers of casings on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, cutting the casings by a preset cutting depth below a body, recovering the drill rod and the hydraulic cutter to the drill floor after the outermost casing is cut off, then lowering a large-size casing fishing spear for fishing the outermost casing, connecting the drill rod, conveying the large-size casing fishing spear to a designated working depth, fishing the outermost casing, and recovering the drill rod, the large-size casing fishing spear, the outermost casing welded with a suspension nipple and the inner casing welded with the body to the drill floor;
mode two, recycling large-size tail pipe hanging mode in stages:
firstly, connecting a hydraulic cutter capable of cutting a 1-layer inner-layer sleeve on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, delivering the hydraulic cutter to a preset cutting depth below a body, cutting the inner-layer sleeve, recovering the drill rod and the hydraulic cutter to the drill floor after the inner-layer sleeve is cut off, then, lowering a sleeve fishing spear for fishing the inner-layer sleeve, connecting the drill rod, delivering the sleeve fishing spear to a designated working depth, fishing the inner-layer sleeve, and recovering the drill rod, the sleeve fishing spear and the inner-layer sleeve welded with the body to the drill floor; then, connecting a hydraulic cutter capable of cutting the outer-layer sleeve of the layer 1 on a drill floor, performing functional test on the hydraulic cutter, connecting a drill rod on the hydraulic cutter, delivering the hydraulic cutter to a preset cutting depth, cutting the outer-layer sleeve, recovering the drill rod and the hydraulic cutter to the drill floor after the outer-layer sleeve is cut off, then lowering a large-size sleeve fishing spear for fishing the outer-layer sleeve, connecting the drill rod, delivering the large-size sleeve fishing spear to a designated operation depth, fishing the outer-layer sleeve, and recovering the drill rod, the large-size sleeve fishing spear and the outer-layer sleeve to the drill floor;
mode three, only retrieve the outer casing:
the hydraulic cutting knife capable of cutting the outer-layer sleeve of the 1 layer is connected to the drill floor, the hydraulic cutting knife is subjected to functional test, the drill rod is connected to the hydraulic cutting knife, the hydraulic cutting knife is fed to a preset cutting depth, the outer-layer sleeve is cut, after the outer-layer sleeve is cut off, the drill rod and the hydraulic cutting knife are recovered to the drill floor, then the large-size sleeve fishing spear used for fishing the outer-layer sleeve is put into the drill floor, the drill rod is connected, the large-size sleeve fishing spear is sent to a designated operation depth, the outer-layer sleeve is fished, and the drill rod, the large-size sleeve fishing spear and the outer-layer sleeve are recovered to the drill floor.
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| US7926590B2 (en) * | 2007-10-03 | 2011-04-19 | Tesco Corporation | Method of liner drilling and cementing utilizing a concentric inner string |
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| CN2809196Y (en) * | 2005-05-13 | 2006-08-23 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Tail pipe hanger |
| CN106567676A (en) * | 2015-10-12 | 2017-04-19 | 中石化石油工程技术服务有限公司 | Expansive tail pipe drilling operation device and operation method thereof |
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| CN114458215A (en) | 2022-05-10 |
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