CN105019850B - Wellhead sealing device and using method - Google Patents
Wellhead sealing device and using method Download PDFInfo
- Publication number
- CN105019850B CN105019850B CN201410177699.9A CN201410177699A CN105019850B CN 105019850 B CN105019850 B CN 105019850B CN 201410177699 A CN201410177699 A CN 201410177699A CN 105019850 B CN105019850 B CN 105019850B
- Authority
- CN
- China
- Prior art keywords
- well
- sealing device
- main body
- top sealing
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title description 7
- 239000003921 oil Substances 0.000 claims abstract description 37
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 239000005060 rubber Substances 0.000 claims abstract description 30
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 239000000945 filler Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 abstract description 5
- 238000005553 drilling Methods 0.000 description 8
- 239000003245 coal Substances 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Gasket Seals (AREA)
Abstract
The present embodiments disclose a wellhead sealing device. By the arrangement of an oil cylinder in the wellhead sealing device, a cable and a wellhead can be sealed under the condition that hydraulic oil enters the oil cylinder, specifically, when the hydraulic oil is filled into the oil cylinder, a piston moves towards a main body, thus two rubber blocks are extruded and downsized, and an inner hole contacting the cable in each rubber block is shrunk so as to seal the connecting cable and the wellhead. Moreover, the wellhead of a vertical well can be opened and closed by a brake valve. During multiple times of communication, by the wellhead sealing device, the wellhead of the vertical well can be closed under the action of the brake valve and the oil cylinder, so that underground collapsing accidents and shaking of a connecting instrument can be avoided, and repeated communication can be finally realized.
Description
Technical field
The present invention relates to coal-bed gas exploitation field, more particularly, it relates to a kind of well top sealing device and using method.
Background technology
In coal bed gas industry, in order to improve the daily output of exploitation coal bed gas, and solution coal bed gas needs low pressure parsing
Feature, many combinations connected with a bite straight well using a bite multi-branched horizontal well or a bite horizontal well on mining type.Wherein,
In the group production practice of horizontal well connection straight well, horizontal well is typically connected once with straight well, and horizontal well is with straight well in handshaking procedures
In, straight well well head is constantly in open mode, and horizontal well connection drilling just rises to connect instrument to straight well during connection target spot 3-5m,
Then horizontal well is further continued for drilling, when straight well well head returns out drilling fluid, shows to connect successfully, at this moment can close straight well well head,
Carry out next step construction operation.
With the needs of exploitation coal bed gas, increasing new technology, such as each branch of multi-branched horizontal well are occurred in that
Will connect with straight well, 2 or multiple coal seams (being also required to repeatedly connection) are exploited simultaneously using a bite straight well for another example.And it is existing
Straight well well head only allows successfully to connect once, if it is desired to the 2nd connection is carried out, as horizontal well and straight well have formed path,
Drilling fluid can be returned out from straight well well head and cause down-hole that collapse accident occurs, simultaneously because the flowing of drilling fluid causes to connect instrument rolling
It is dynamic, it is impossible to correct to gather signal so as to lead to not connection.
In sum, how to realize that horizontal well is connected with the multiple of straight well, become those skilled in the art urgently to be resolved hurrily
Technical problem.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of well top sealing device, to realize repeatedly connecting for horizontal well and straight well
Logical purpose.
What the embodiment of the present invention was realized in：
A kind of well top sealing device, the well top sealing device are arranged at straight well well head, including：
The main body that can be fixed at the straight well well head, is provided with first passage and leads to described first in the main body
The second channel of road vertical connection, the first passage run through the main body, are provided with gate valve on the second channel；And
By double male joints connection oil cylinder on the body, wherein, described pair of male joint is connected with the first passage
It is logical, two semi-cylindrical block rubbers are provided with described pair of male joint and two block rubbers are prevented near the master
The occlusion part of body direction movement；The oil cylinder is included the cylinder body being fixed together with described pair of male joint and is slided with the cylinder body
The piston of cooperation, when the cylinder interior enters hydraulic oil, two block rubbers of the piston press；In the piston
In the middle part of portion, two for the being stitched together block rubber and the occlusion part middle part formed in the axial direction receiving cable lead to
The third channel crossed.
Preferably, in above-mentioned well top sealing device, the occlusion part is the first metal derby, and described pair of male joint is near described
Main body one end is provided with the cascaded surface abutted against with first metal derby.
Preferably, in above-mentioned well top sealing device, first metal derby is two, two described for being stitched together
First through hole is provided with the middle part of one metal derby.
Preferably, in above-mentioned well top sealing device, two are additionally provided between the piston and two block rubbers will
The thrust of the piston passes to the second metal derby of the block rubber, in the middle part of two second metal derbies being stitched together
It is provided with the second through hole.
Preferably, in above-mentioned well top sealing device, the cylinder interior has stroke cavity and buffering cavity, wherein, institute
The inwall that piston is stated with the stroke cavity is slidably matched, and the buffering cavity is connected with the stroke cavity, and is located at institute
The side of stroke cavity is stated, on the cylinder body and the position of the cushion chamber body phase pair, oil filler point is provided with.
Preferably, in above-mentioned well top sealing device, the oil filler point externally connected portable formula handlance.
Preferably, in above-mentioned well top sealing device, the main body is contacted with the straight well well head and be additionally provided with end face rotation
Adaptor.
Preferably, in above-mentioned well top sealing device, be provided between the swivel joint and the main body sealed bearings and
Sealing ring.
Preferably, in above-mentioned well top sealing device, it is additionally provided with the main body for installing the fixing hole of pulley.
Preferably, in above-mentioned well top sealing device, also lead to including fixing on the body and seal described first
The helmet in road.
Embodiment of the present invention well top sealing device when in use, main body is arranged on straight well wellhead casing pipe, installation oil cylinder；
Cable pass through third channel, decentralization connection instrument and cable to straight well cave position to oil cylinder in suppress hydraulic oil；Horizontal well is opened
Pump connects operation；From connectivity points 3-5m when termination of pumping.In the embodiment of the present invention in well top sealing device oil cylinder setting so that oil cylinder
In complete the sealing of cable and well head in the case where hydraulic oil is entered, specifically, when hydraulic oil is filled with oil cylinder, piston to
Move near the direction of main body, and then extrude block rubber so that two block rubbers are squeezed volume-diminished, then block rubber and cable
The endoporus of contact reduces, so as to realize the sealing to communication cable and well head.Additionally, the setting of gate valve can realize straight well well head
Switch arrange.Therefore, in the multiple handshaking procedures of horizontal well and straight well, by using the sealing wellhead in the embodiment of the present invention
Device, in the presence of gate valve and oil cylinder so that straight well well head is closed, so as to avoid causing down-hole from collapsing thing
Therefore, and the generation of connection instrument shaking phenomenon, can finally realize repeatedly connection.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the mounting structure schematic diagram of the well top sealing device provided in the embodiment of the present invention；
Fig. 2 is the broken section structural representation of the well top sealing device provided in the embodiment of the present invention；
Fig. 3 is the cross section structure diagram of the oil cylinder provided in the embodiment of the present invention；
Fig. 4 is the cross section structure diagram of the double male joints provided in the embodiment of the present invention.
In Fig. 1 to Fig. 4,
1 is main body, 11 is first passage, 12 is second channel, 2 is oil cylinder, 21 is cylinder body, 22 is piston, 23 is through hole,
24 for buffering cavity, 25 be stroke cavity, 26 be sealing ring, 27 be sealing ring, 28 be oil filler point, 3 be gate valve, 4 be fixing hole,
5 is swivel joint, 6 is fixed block, 7 is double male joints, 71 is block rubber, 72 is the first metal derby, 73 is the second metal derby,
74 is third channel, 8 is portable hand press pump for connection instrument, 9.
Specific embodiment
Related terms are explained：
Connection：Exactly two mouthfuls of wells are docking together using connection instrument (RMRS), successfully main phenomenon is for connection
Horizontal well founds drops, straight well well head and returns out drilling fluid, returns gas.
Connection instrument is rotary magnetic range-measurement system also known as RMRS (Rotary Magnetic Ranging System) full name,
Strong magnetic joint is added in BHA, is measured using magnetic principle in entering to produce straight well under inserting tube, in 60m distance ranges, can be accurately
Both detections Azimuth ＆ Range, leads into the target area of 0.5 meter of diameter.Effectively can be eliminated with brill using RMRS guiding connection drillings
The impact of measuring instrument cumulative error.
Straight well cave：After being exactly straight well setting of casing, in order to the casing firing milling connected coal seam section falls and is made with re-drill bit
The coal seam section of the well section caliper expansion.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Core of the present invention is to disclose a kind of well top sealing device, to realize the multiple purpose for connecting of horizontal well and straight well.
By using the well top sealing device so that the well head of straight well is closed in horizontal well handshaking procedures, so as to
Collapse accident and connection 8 device shaking phenomenon of instrument are enough avoided the occurrence of, and the phenomenon of multiple connection cannot be realized.
Well top sealing device as shown in Figures 1 to 4, the well top sealing device are arranged at straight well well head, including：
The main body 1 that can be fixed at straight well well head, is provided with first passage 11 and vertical with first passage 11 in main body 1
The second channel 12 of connection, first passage 11 run through main body 1, and gate valve 3 is provided with second channel 12；And
Connect oil cylinder 2 on the body 1 by double male joints 7, wherein, double male joints 7 are connected with first passage 11, double public affairs
Two semi-cylindrical block rubbers 71 are provided with joint 7 and two block rubbers 71 are prevented near the movement of 1 direction of main body
Occlusion part；The piston 22 that oil cylinder 2 is included the cylinder body 21 being fixed together with double male joints 7 and is slidably matched with cylinder body 21, works as cylinder
When entering hydraulic oil inside body 21, piston 22 extrudes two block rubbers 71；The middle part of piston 22, two for being stitched together rubber
In the middle part of the block 71 and middle part of occlusion part forms in the axial direction and accommodates the third channel 74 that passes through of cable.
Embodiment of the present invention well top sealing device when in use, main body 1 is arranged on straight well wellhead casing pipe, installation oil cylinder
2；Cable pass through third channel 74, decentralization connection 8 device of instrument and cable to straight well cave position to oil cylinder 2 in suppress hydraulic oil；Water
Horizontal well turn on pump connects operation；From connectivity points 3-5m when termination of pumping.In the embodiment of the present invention in well top sealing device oil cylinder 2 setting,
So that complete the sealing of cable and well head in the case where hydraulic oil is entered in oil cylinder 2, specifically, when being filled with hydraulic pressure in oil cylinder 2
When oily, piston 22 is to moving near the direction of main body 1, and then extrudes block rubber 71 so that two block rubbers 71 are squeezed volume
Reduce, then block rubber 71 is reduced with the endoporus of conductive cable contacts, so as to realize the sealing to communication cable and well head.Additionally, gate valve 3
Setting can realize straight well well head switch arrange, for connection success after open observation phenomenon.
Therefore, in the multiple handshaking procedures of horizontal well and straight well, by being filled using the sealing wellhead in the embodiment of the present invention
Put, in the presence of gate valve 3 and oil cylinder 2 so that straight well well head is closed, so as to avoid causing down-hole from collapsing thing
Therefore, and the generation of connection 8 device shaking phenomenon of instrument, can finally realize repeatedly connection.
As shown in figure 4, above-mentioned occlusion part can be the self structure of double male joints 7, the cylinder for example, with through hole 23
Shape structure, or have cylindrical-shaped structure jaggy, wherein, the setting of through hole 23 and breach is primarily to accommodate cable.And
Occlusion part itself has certain hardness, i.e., during block rubber 71 is extruded, occlusion part itself will not occur obvious shape
Become.It should be noted that the deformation during substantially deformation such as block rubber 71 is extruded.Therefore, occlusion part material can be
Plastics, polyethylene, metal etc., occlusion part is the first metal derby 72 in embodiments of the present invention, and double male joints 7 are near main body 1 one
End is provided with the cascaded surface abutted against with the first metal derby 72.First metal derby 72 can be iron block, firm block, copper billet, aluminium block, conjunction
Gold bullion etc..
In addition, installing cable for convenience, the quantity of the first metal derby 72 is two, and two the first metal derbies 72 splice
Can make up cylindrical structural together afterwards, in the middle part of two the first metal derbies 72 being stitched together, be provided with first through hole 23.When
So, two the first metal derbies 72 can also be as unsymmetric structure, as long as cylindrical structure can be spliced into symmetrical structure
Two the first metal derbies 72 are in the protection domain of the embodiment of the present invention.
In the embodiment of the present invention, two block rubbers 71 can directly be extruded by piston 22, can be entering by miscellaneous part
Row extruding, has limitation in view of the stroke of piston 22 in the embodiment of the present invention, using the structure of the latter, piston 22 and two
The second metal derby 73 that two thrusts by piston 22 pass to block rubber 71 is additionally provided between block rubber 71, two splicings exist
The second through hole 23 is provided with the middle part of the second metal derby 73 together.Wherein, the knot of above-mentioned second metal derby 73 may be referred to first
Here is omitted for the structure of metal derby 72.
In order to increase the rated pressure of oil cylinder 2, there is inside cylinder body 21 stroke cavity 25 and buffering cavity 24, wherein, it is living
Plug 22 is slidably matched with the inwall of stroke cavity 25, and buffering cavity 24 is connected with stroke cavity 25, and is located at stroke cavity 25
Side, cylinder body 21 is provided with oil filler point 28 with the relative position of buffering cavity 24.Can external oil transportation by the oil filler point 28
Part, to realize the fuel feeding to oil cylinder 2.Transport for convenience, 28 externally connected portable formula handlance of oil filler point in the embodiment of the present invention
9。
In order to ensure the sealing of piston 22 and cylinder body 21, the position that cylinder body 21 is contacted with piston is provided with sealing ring 26
With sealing ring 27.
Main body 1 is contacted with straight well well head and be additionally provided with end face swivel joint 5.Certainly only it is not in the embodiment of the present invention
Swivel joint 5 is limited only to, can also be replaced using non-rotating joint 5, but be unfavorable for connecting putting for car, not be afraid of trouble and also may be used
Realize identical function.The button-type of lower end can be directly the button-type consistent with straight well wellhead casing pipe, or routine
411st, 311 or 211 button-types add an adapter (the long round buckle of 410/ sleeve pipe) again.
In order to ensure sealing between swivel joint 5 and main body 1, while prevent drilling fluid from thus flowing out, swivel joint 5 with
Sealing ring is provided between main body 1.And between swivel joint 5 and main body 1 sealed bearings setting, can play rotation and hang
Effect, makes swivel joint 5 link together with body, while playing the role of to assist sealing.
Be additionally provided with main body 1 for installing the fixing hole 4 of pulley, by arranging fixing hole 4, connection is removed for fixation
The well head pulley of cable, it is not necessary to the equipment auxiliary hanging well head pulley such as crane.The size of fixed block 6 is propped up with meeting well head pulley
Frame diameter is advisable, and is determined according to the well head pulley bracket diameter for adopting.
The well mouth sealing device also includes the helmet that can fix on the body 1 and seal first passage 11.Connection 8 device of instrument
After acting straight well well head, the sealing to well head is realized by oil cylinder 2 is replaced by helmet.Can also be using a female thread (button
Type) the helmet part consistent with oil cylinder 2 to be realizing the wellhead sealing after originally communication cable.
In this specification, each embodiment is described by the way of progressive, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. a kind of well top sealing device, the well top sealing device are arranged at straight well well head, it is characterised in that included：
The main body that can be fixed at the straight well well head, is provided with first passage and is hung down with the first passage in the main body
Direct-connected logical second channel, the first passage run through the main body, are provided with gate valve on the second channel；And
By double male joints connection oil cylinder on the body, wherein, described pair of male joint is connected with the first passage, institute
State two semi-cylindrical block rubbers are provided with double male joints and two block rubbers are prevented near the main body side
To mobile occlusion part；The oil cylinder is included the cylinder body being fixed together with described pair of male joint and is slidably matched with the cylinder body
Piston, when the cylinder interior enter hydraulic oil when, two block rubbers of the piston press；The middle part of the piston,
In the middle part of two block rubbers being stitched together and the occlusion part middle part formed in the axial direction receiving cable pass through
Third channel.
2. well top sealing device according to claim 1, it is characterised in that the occlusion part is the first metal derby, described
Double male joints are provided with the cascaded surface abutted against with first metal derby near described main body one end.
3. well top sealing device according to claim 2, it is characterised in that first metal derby is two, two spellings
First through hole is provided with the middle part of first metal derby being connected together.
4. well top sealing device according to claim 3, it is characterised in that between the piston and two block rubbers
Be additionally provided with the second metal derby that two thrusts by the piston pass to the block rubber, two be stitched together it is described
The second through hole is provided with the middle part of second metal derby.
5. well top sealing device according to claim 1, it is characterised in that there is the cylinder interior stroke cavity to ease up
Cavity is rushed, wherein, the piston is slidably matched with the inwall of the stroke cavity, described to buffer cavity and the stroke cavity phase
Connection, and oil filler point is provided with the side of the stroke cavity, the cylinder body and the position of the cushion chamber body phase pair.
6. well top sealing device according to claim 5, it is characterised in that the oil filler point externally connected portable formula handlance.
7. well top sealing device according to any one of claim 1 to 6, it is characterised in that the main body is straight with described
Swivel joint is additionally provided with well well head contact end face.
8. well top sealing device according to claim 7, it is characterised in that set between the swivel joint and the main body
It is equipped with sealed bearings and sealing ring.
9. well top sealing device according to any one of claim 1 to 6, it is characterised in that also set up in the main body
Have for installing the fixing hole of pulley.
10. well top sealing device according to any one of claim 1 to 6, it is characterised in that also including can be fixed on
In the main body and seal the helmet of the first passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177699.9A CN105019850B (en) | 2014-04-29 | 2014-04-29 | Wellhead sealing device and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410177699.9A CN105019850B (en) | 2014-04-29 | 2014-04-29 | Wellhead sealing device and using method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105019850A CN105019850A (en) | 2015-11-04 |
| CN105019850B true CN105019850B (en) | 2017-04-12 |
Family
ID=54410093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410177699.9A Active CN105019850B (en) | 2014-04-29 | 2014-04-29 | Wellhead sealing device and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105019850B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286239Y (en) * | 1997-04-02 | 1998-07-15 | 中国石油天然气总公司石油勘探开发科学研究院廊坊分院完井工艺研究所 | Low-voltage electric cable test wellhead blowout preventor |
| US7350580B1 (en) * | 2004-08-04 | 2008-04-01 | Aker Kvaerner Subsea, Inc. | Subsea pass thru switching system |
| CN102213082A (en) * | 2011-03-23 | 2011-10-12 | 承德市开发区富泉石油机械有限公司 | Capsule type cable control head |
| CN202611649U (en) * | 2012-01-17 | 2012-12-19 | 克拉玛依新宇宙油气技术开发有限公司 | Pressure return type well opening movable sealing device capable of running with pressure |
| CN203796210U (en) * | 2014-04-29 | 2014-08-27 | 北京奥瑞安能源技术开发有限公司 | Wellhead sealing device for communication |
-
2014
- 2014-04-29 CN CN201410177699.9A patent/CN105019850B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2286239Y (en) * | 1997-04-02 | 1998-07-15 | 中国石油天然气总公司石油勘探开发科学研究院廊坊分院完井工艺研究所 | Low-voltage electric cable test wellhead blowout preventor |
| US7350580B1 (en) * | 2004-08-04 | 2008-04-01 | Aker Kvaerner Subsea, Inc. | Subsea pass thru switching system |
| CN102213082A (en) * | 2011-03-23 | 2011-10-12 | 承德市开发区富泉石油机械有限公司 | Capsule type cable control head |
| CN202611649U (en) * | 2012-01-17 | 2012-12-19 | 克拉玛依新宇宙油气技术开发有限公司 | Pressure return type well opening movable sealing device capable of running with pressure |
| CN203796210U (en) * | 2014-04-29 | 2014-08-27 | 北京奥瑞安能源技术开发有限公司 | Wellhead sealing device for communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105019850A (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207437007U (en) | Hydraulic delay switch DP formula sliding sleeve | |
| CN207080207U (en) | Oil field separates adopts technology tubular column | |
| CN205823187U (en) | Universal flexible device | |
| CN205605160U (en) | Broken tail pipe blanking plug | |
| CN102134976A (en) | Tunnel drilling hydraulic power reverse-circulation dual-walled drilling tool | |
| CN101575951B (en) | Petroleum expansion pipe hanger and construction technology | |
| CN109339757A (en) | Time-delay sliding sleeve | |
| CN104563872B (en) | Blockage resisting self-filling-type float collar | |
| CN102364038B (en) | Embedded guide positioning device for underwater tubing hanger | |
| CN203796210U (en) | Wellhead sealing device for communication | |
| CN101915063A (en) | Ground Drilling Casings Resistant to Mining Damage | |
| CN105089629A (en) | Horizontal well rod conveying well logging method | |
| CN105089622B (en) | Horizontal well rod conveying logging process rod pipe column | |
| CN105019850B (en) | Wellhead sealing device and using method | |
| CN214247310U (en) | A detection and positioning device for downhole pipe and rod couplings for workover operations | |
| CN206376810U (en) | Long packing element packer for oil field isolation | |
| CN101718170B (en) | Preformed six-stage branch well system tool | |
| CN204804819U (en) | Horizontal well rod conveying dynamic logging process rod pipe column | |
| CN110965950B (en) | Ground separate injection process pipe column for special-shaped continuous oil pipe | |
| CN105089631A (en) | Horizontal well rod conveying dynamic logging method | |
| CN107795297A (en) | Multistage a chain of Cut Block blocking | |
| CN104502002A (en) | Hydraulic force transfer type borehole stressmeter and operation method thereof | |
| CN205422620U (en) | Mine coal seam drilling hole packer | |
| CN105089630B (en) | Horizontal well rod conveying dynamic logging process rod pipe column and using method | |
| CN211573498U (en) | Hydraulic fracturing measuring device suitable for three-dimensional measuring equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |