CN103806886B - A kind of sealed device of thick oil thermal extraction underground steam and sealed method thereof - Google Patents
A kind of sealed device of thick oil thermal extraction underground steam and sealed method thereof Download PDFInfo
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- CN103806886B CN103806886B CN201210436711.4A CN201210436711A CN103806886B CN 103806886 B CN103806886 B CN 103806886B CN 201210436711 A CN201210436711 A CN 201210436711A CN 103806886 B CN103806886 B CN 103806886B
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- piston
- hydraulic pressure
- outer tube
- standing valve
- oil
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- 238000000605 extraction Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims description 20
- 238000010079 rubber tapping Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 210000002445 nipple Anatomy 0.000 claims description 8
- 239000003129 oil well Substances 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002595 cold damage Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
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Abstract
The invention discloses the sealed device of a kind of thick oil thermal extraction underground steam and sealed method thereof, comprise packing in well and the thermal packer of oil reservoir upper position, in the middle of bottom described thermal packer, reverser is set, top is then connected to hydraulic pressure by screen casing and discloses on valve gear, described hydraulic pressure disclose valve gear at center downwards and reverser be that trigger-type abuts against, described hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe, and described standing valve controller is arranged on pump lower end.After the present invention can realize steam injection operation, switch effectively cuts out, and turns that to take out operation switch open be carry out under wellhead sealing state after can realizing steam injection again, overcomes prior art defect and deficiency.
Description
Technical field
The present invention relates to thick oil thermal extraction underground steam control technology, specifically the sealed device of a kind of thick oil thermal extraction underground steam and sealed method thereof.
Background technology
At present, heavy crude reservoir generally adopts the mode of steam injection to exploit, want to realize steam injection complete after turn and take out operation, due to the existence of high temperature and high pressure gas in well, the way of usual employing circulation well cleanup cools to tubing string, this way often formation produces cold damage, reduces reservoir exploitation efficiency.And as patent 200720018946.6 discloses a kind of DH switchgear of high-temperature high pressure of hot extracting thick oil in prior art, publication date is 2008-03-05, this switching device can realize passage and open and close, but need to enter to open the unlatching that tubing string realizes switching device specially, the drawback of this method is that after switch open, well head cannot realize sealing, down-hole high pressure High Temperature Gas knows from experience ejection well head, causes security incident.
In view of this, for the problems referred to above, propose a kind of reasonable in design and effectively improve the sealed device of thick oil thermal extraction underground steam of above-mentioned disappearance, give brand-new sealed method simultaneously.
Summary of the invention
The object of the present invention is to provide the sealed device of a kind of thick oil thermal extraction underground steam and sealed method thereof, after can realizing steam injection operation, switch effectively cuts out, turn after can realizing steam injection again that to take out operation switch open be carry out under wellhead sealing state, overcome prior art defect and deficiency.
In order to reach above-mentioned purpose, present invention employs following technical scheme, the sealed device of a kind of thick oil thermal extraction underground steam, comprise packing in well and the thermal packer of oil reservoir upper position, in the middle of bottom described thermal packer, reverser is set, top is then connected to hydraulic pressure by screen casing and discloses on valve gear, described hydraulic pressure disclose valve gear at center downwards and reverser be that trigger-type abuts against, described hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe, and described standing valve controller is arranged on pump lower end.
Described thermal packer is connected on screen casing by the anchoring device at top, and is fixedly set on the borehole wall by anchoring device; Described anchoring device is connected with screen casing by landing nipple.
Described hydraulic pressure discloses the piston that valve gear comprises outer tube and outer tube, it is wherein the runner of up/down perforation in the middle of piston, runner is suitable for reading is V-type opening, inside establish and suppress ball seat, runner end opening connects tapping pin, and described tapping pin is directly connected to the top of reverser through the middle cavity of screen casing, anchoring device, thermal packer successively.
Described piston outer wall offers groove, the outer tube of respective slot position is provided with the shear pin in front insertion groove, the outer tube wall below described piston is also provided with locking system, and offers the helicitic texture corresponding with locking system at piston outer wall; Also O-ring seal is provided with between described piston and outer tube; Described outer tube upper and lower side is all connected on oil pipe and screen casing by joint.
Described standing valve controller comprises the piston of outer tube and outer tube, and be the runner of up/down perforation in the middle of described piston, runner center arranges push rod, and this push rod upper end is connected to bottom the standing valve of pump, and bottom is fixed on piston base by holder.
Described piston outer wall offers groove, the outer tube of respective slot position is provided with the shear pin in front insertion groove, is also provided with O-ring seal between described piston and outer tube; Described outer tube upper and lower side is all connected on pump and oil pipe by joint.
Described reverser comprises the back-moving spring that ball seat is connected with bottom, and the top of ball seat withstands on the through hole that thermal packer is offered.
In order to reach another object above-mentioned, present invention employs following technical scheme, the sealed device of a kind of thick oil thermal extraction underground steam carries out the method for sealed steam, the steps include:
First will arrive the top design attitude of oil reservoir under reverser and thermal packer and anchoring device, anchoring device carries out grappling, packer setting, in well, carry out steam injection operation, after steam injection operation completes, reverser cuts out under the pressure effect of shaft bottom gases at high pressure;
Standing valve controller is connected on oil well pump lower end, and hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe, and take out tubing string G.I.H with turning, tubing string is down to landing nipple place; The process entered under tubing string, reverser is in closed condition;
After putting in place under tubing string, seated well head, suppresses from well head, the push rod of standing valve controller is reconciled by pump standing valve jack-up before going into the well, can realize pressure transmission function, the runner going down that hydraulic pressure is formed by the hollow-core construction of standing valve controller piston, what be passed to that hydraulic pressure discloses valve gear suppresses ball seat;
Standing valve controller shear pin is cut off controlled pressure and is disclosed valve gear shear pin higher than hydraulic pressure and cut off controlled pressure, when hydraulic coupling be passed to suppress ball seat time, hydraulic coupling exceedes hydraulic pressure and discloses valve gear shear pin and cut off controlled pressure, and hydraulic pressure is disclosed valve gear shear pin and first cut off, tapping pin is descending, by switch opens;
After switch opens, the runner that in well, liquid discloses valve gear by hydraulic pressure enters pit shaft, because standing valve controller piston upper section area is greater than lower section area, therefore, well head is suppressed, the hydraulic coupling that upper section is produced higher than bottom pressure in the upper top power that lower section produces; When pressure differential is higher than shear pin shear pressure, standing valve controller shear pin is cut off, and piston driving push rod comes downwards to standing valve controller outer tube variable cross-section place, simultaneously standing valve return, and oil well pump and ground oil pumping system realize the suction of liquid in well.
Compared to prior art, the present invention has following beneficial effect:
1, this covering device reverser, thermal packer, anchoring device, landing nipple G.I.H before steam injection, realize safe steam injection function, after steam injection completes, hydraulic pressure is disclosed valve gear, standing valve controller etc. and be connected on pump lower end, tubing string together G.I.H is taken out with turning, switch open can be completed under wellhead sealing state again after steam injection, realize turning and take out function, effectively avoid vapours to spray the generation of well head accident, construction safety reliability improves greatly.
2, utilize the hollow-core construction of standing valve controller piston, can be formed and suppress passage, realize the unlatching of switch, the oil inlet passage after switch open can be realized again.
3, utilize standing valve controller piston and hydraulic pressure to disclose valve gear piston and control the ladder pressure cut off of shear pin, guarantee down-hole switch be open at wellhead sealing state under complete, effectively avoid vapours to spray the generation of well head accident, security reliability improves greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sealed device of a kind of thick oil thermal extraction of the present invention underground steam.
In figure: 1, standing valve; 2, joint; 3, O-ring seal; 4, piston; 5, shear pin; 6, outer tube; 7, O-ring seal; 8, holder; 9, joint; 10, oil pipe; 11, joint; 12, outer tube; 13, O-ring seal; 14, shear pin; 15, locking system; 16, helicitic texture; 17, screen casing; 18, anchoring device; 19, thermal packer; 20, reverser; 21, runner; 22, runner; 23, push rod; 24, piston; 25, ball seat is suppressed; 26, landing nipple; 27, tapping pin; 28, oil reservoir; 29, artificial bottom of a well.
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the present invention.
According to Fig. 1, the sealed device of a kind of thick oil thermal extraction underground steam, comprise packing in well and the thermal packer 19 of oil reservoir 28 upper position, in the middle of bottom described thermal packer, reverser 20 is set, top is then connected to hydraulic pressure by screen casing 17 and discloses on valve gear, described hydraulic pressure disclose valve gear at center downwards and reverser be that trigger-type abuts against, described hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe 10, and described standing valve controller is arranged on pump lower end.Thermal packer is connected on screen casing by the anchoring device 18 at top, and is fixedly set on the borehole wall by anchoring device; Described anchoring device is connected with screen casing by landing nipple.
Hydraulic pressure discloses the piston 24 that valve gear comprises outer tube 12 and outer tube, it is wherein the runner 21 of up/down perforation in the middle of piston, runner is suitable for reading is V-type opening, inside establish and suppress ball seat 25, runner end opening connects tapping pin 27, and described tapping pin is directly connected to the top of reverser through the middle cavity of screen casing, anchoring device, thermal packer successively.Piston outer wall offers groove, the outer tube of respective slot position is provided with the shear pin 14 in front insertion groove, the outer tube wall below described piston is also provided with locking system 15, and offers the helicitic texture 16 corresponding with locking system at piston outer wall; O-ring seal 13 is also provided with between described piston and outer tube; Described outer tube 12 upper and lower side is all connected on oil pipe and screen casing by joint.
Standing valve controller comprises the piston 4 of outer tube 6 and outer tube, and be the runner 22 of up/down perforation in the middle of described piston, runner center arranges push rod 23, and this push rod upper end is connected to bottom the standing valve 1 of pump, and bottom is fixed on piston base by holder 8.Piston outer wall offers groove, the outer tube of respective slot position is provided with the shear pin 5 in front insertion groove, is also provided with O-ring seal 3,7 between described piston and outer tube; Described outer tube upper and lower side is all connected on pump and oil pipe by joint.
When carrying out concrete steam and being sealed, arrive design attitude by under reverser and thermal packer and anchoring device before steam injection, anchoring device carries out grappling, packer setting, carry out steam injection operation, after steam injection operation completes, reverser cuts out under the pressure effect of shaft bottom gases at high pressure.Turn when taking out operation and standing valve controller is connected on pump lower end, hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe 10, and screen casing 17 is connected on discloses valve system lower end, after connection with tubing string down to landing nipple 26 place; After putting in place under tubing string, seated well head, suppress from well head, the push rod 23 of standing valve controller is reconciled by pump standing valve 1 jack-up before going into the well, pressure transmission function can be realized, runner 22 going down that hydraulic pressure is formed by the hollow-core construction of standing valve controller piston 4, what be passed to that hydraulic pressure discloses valve gear suppresses ball seat 25.Standing valve controller shear pin 5 involved by this device is cut off controlled pressure and is disclosed valve gear shear pin 14 higher than hydraulic pressure and cut off controlled pressure, disclose valve gear shear pin 14 cut off controlled pressure when hydraulic coupling exceedes hydraulic pressure, hydraulic pressure is disclosed valve gear shear pin 14 and is first cut off, and tapping pin 27 is descending, is opened by switch 20.After switch 20 is opened, in well, liquid enters pit shaft by runner 21, because standing valve controller piston 4 upper section area is greater than lower section area, therefore, the hydraulic coupling that upper section is produced higher than bottom pressure in the upper top power that lower section produces.When pressure differential is higher than shear pin shear pressure, standing valve controller shear pin 3 is cut off, and piston 4 drives push rod 23 to come downwards to standing valve controller outer tube variable cross-section place, simultaneously standing valve 1 return, and pump and ground oil pumping system realize the suction of liquid in well.
The foregoing is only preferred embodiment of the present invention, be not used to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (5)
1. the sealed device of thick oil thermal extraction underground steam, it is characterized in that, comprise packing in well and the thermal packer of oil reservoir upper position, in the middle of bottom described thermal packer, reverser is set, top is then connected to hydraulic pressure by screen casing and discloses on valve gear, described hydraulic pressure disclose valve gear at center downwards and reverser be that trigger-type abuts against, described hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe, and described standing valve controller is arranged on oil well pump lower end; Described thermal packer is connected on screen casing by the anchoring device at top, and is fixedly set on the borehole wall by anchoring device; Described anchoring device is connected with screen casing by landing nipple; Described hydraulic pressure discloses the first piston that valve gear comprises the first outer tube and the first outer tube, it is wherein the first flow of up/down perforation in the middle of first piston, first flow is suitable for reading is V-type opening, inside establish and suppress ball seat, first flow end opening connects tapping pin, and described tapping pin is directly connected to the top of reverser through the middle cavity of screen casing, anchoring device, thermal packer successively.
2. the sealed device of a kind of thick oil thermal extraction underground steam according to claim 1, it is characterized in that, described first piston outer wall offers groove, first outer tube of respective slot position is provided with the first shear pin in front insertion groove, the first outer tube wall below described first piston is also provided with locking system, and offers the helicitic texture corresponding with locking system at first piston outer wall; Also O-ring seal is provided with between described first piston and the first outer tube; Described first outer tube upper and lower side is all connected on oil pipe and screen casing by the first joint.
3. the sealed device of a kind of thick oil thermal extraction underground steam according to claim 1, it is characterized in that, described standing valve controller comprises the second piston of the second outer tube and the second outer tube, it is the second runner of up/down perforation in the middle of described second piston, second runner center arranges push rod, this push rod upper end is connected to bottom the standing valve of oil well pump, and bottom is fixed on the second piston base by holder.
4. the sealed device of a kind of thick oil thermal extraction underground steam according to claim 3, it is characterized in that, described second piston outer wall offers groove, second outer tube of respective slot position is provided with the second shear pin in front insertion groove, between described second piston and the second outer tube, is also provided with O-ring seal; Described second outer tube upper and lower side is all connected on oil well pump and oil pipe by the second joint.
5. application rights requires that the sealed device of a kind of thick oil thermal extraction underground steam described in 1-4 any one claim carries out the method for sealed steam, the steps include:
First will arrive the top design attitude of oil reservoir under reverser and thermal packer and anchoring device, anchoring device carries out grappling, packer setting, in well, carry out steam injection operation, after steam injection operation completes, reverser cuts out under the pressure effect of shaft bottom gases at high pressure;
Standing valve controller is connected on oil well pump lower end, and hydraulic pressure is disclosed valve gear and is connected with standing valve controller by oil pipe, with turn take out tubing string G.I.H, tubing string down to landing nipple place, the process entered under tubing string, reverser is in closed condition;
After putting in place under tubing string, seated well head, suppress from well head, before going into the well, regulate the push rod of standing valve controller by standing valve for oil-well pump jack-up, pressure transmission function can be realized, the second runner going down that hydraulic pressure is formed by the hollow-core construction of standing valve controller second piston, what be passed to that hydraulic pressure discloses valve gear suppresses ball seat;
Standing valve controller second shear pin is cut off controlled pressure and is disclosed valve gear first shear pin higher than hydraulic pressure and cut off controlled pressure, when hydraulic coupling be passed to suppress ball seat time, hydraulic coupling exceedes hydraulic pressure and discloses valve gear first shear pin and cut off controlled pressure, hydraulic pressure is disclosed valve gear first shear pin and is first cut off, tapping pin is descending, is opened by reverser;
After reverser is opened, the first flow that in well, liquid discloses valve gear by hydraulic pressure enters pit shaft, because standing valve controller second piston upper section area is greater than lower section area, therefore, well head is suppressed, the hydraulic coupling that upper section is produced higher than bottom pressure in the upper top power that lower section produces; When pressure differential is higher than the second shear pin shear pressure, standing valve controller shear pin is cut off, and the second piston driving push rod comes downwards to standing valve controller second outer tube variable cross-section place, simultaneously standing valve return, and oil well pump and ground oil pumping system realize the suction of liquid in well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436711.4A CN103806886B (en) | 2012-11-06 | 2012-11-06 | A kind of sealed device of thick oil thermal extraction underground steam and sealed method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210436711.4A CN103806886B (en) | 2012-11-06 | 2012-11-06 | A kind of sealed device of thick oil thermal extraction underground steam and sealed method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN103806886A CN103806886A (en) | 2014-05-21 |
| CN103806886B true CN103806886B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210436711.4A Expired - Fee Related CN103806886B (en) | 2012-11-06 | 2012-11-06 | A kind of sealed device of thick oil thermal extraction underground steam and sealed method thereof |
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| CN (1) | CN103806886B (en) |
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| CN106703751A (en) * | 2015-07-17 | 2017-05-24 | 中国石油化工股份有限公司 | Thick oil production well immovable string downhole switch and switching on and switching off method |
| CN106481300B (en) * | 2015-08-25 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of steam drive sealed device and method of steam injection well underground oil reservoir |
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| CN107476789B (en) * | 2017-09-20 | 2023-07-18 | 东营华力石油技术股份有限公司 | Injection and production integrated pump and method of linkage packer |
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| CN115478823B (en) * | 2022-09-21 | 2024-07-26 | 中海石油（中国）有限公司天津分公司 | Tubular column for steam huff and puff injection and production integrated operation |
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| CN103806886A (en) | 2014-05-21 |
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Granted publication date: 20160406 Termination date: 20191106 |