CN112943161A - Side drilling is exempted from to hang and can be lost hand well cementation well completion device - Google Patents
Side drilling is exempted from to hang and can be lost hand well cementation well completion device Download PDFInfo
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- CN112943161A CN112943161A CN202110048789.8A CN202110048789A CN112943161A CN 112943161 A CN112943161 A CN 112943161A CN 202110048789 A CN202110048789 A CN 202110048789A CN 112943161 A CN112943161 A CN 112943161A
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- sidetracking
- reverse circulation
- well
- casing
- piston
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
Abstract
The invention relates to a side drilling suspension-free disposable well cementation and completion device which comprises a side drilling casing, a left-hand thread release, a reverse circulation valve capable of being automatically switched on and off, and a one-way leather cup packer, wherein the left-hand thread release, the reverse circulation valve and the one-way leather cup packer are arranged on the side drilling casing and are in threaded connection with the side drilling casing; a reverse circulation valve capable of being automatically opened and closed is arranged above the one-way packing cup packer, and a back-off releasing tool is arranged above the reverse circulation valve capable of being automatically opened and closed; the side drilling suspension-free hand-losing well cementation and completion device adopts a well completion sleeve to be put in at one time, the integrity of a shaft is higher, meanwhile, the leakage points of the shaft are reduced, and the smooth fracturing construction in the later period is ensured; the construction link of well completion operation is simplified, and the construction cost and the running risk brought by the hanger are reduced. The later releasing success rate is high, and the running of the oil production pipe column is not influenced.
Description
Technical Field
The invention belongs to the technical field of lateral drilling of old wells in oil fields, and particularly relates to a lateral drilling suspension-free hand-losing well cementation and completion device.
Background
At present, the old well sidetrack of the domestic oil field generally adopts suspension well cementation well completion, most of hangers do not have the tie-back function after releasing, so that the upper part of the hanger after well completion is an original well casing; because the original well casing has low pressure bearing, the later fracturing pressure, the discharge capacity and the process mode are limited. The hanger with the tie-back function can meet the tie-back function after releasing, so that a brand new shaft is formed, but a drill rod needs to be put in, the hanger is hung and taken out after releasing, and then a well completion casing is connected with a tie-back tool to complete the tie-back with the release tool. In the well completion mode, the sealing performance of the tie-back part and the smooth re-release at the later stage are uncertain. The return height of annular cement slurry cannot be controlled by adopting a non-suspension mode, so that a release can be fixed by cement and cannot be released; at present, the commonly used reverse circulation valves which can provide a reverse circulation channel at home and abroad generally adopt two structures: firstly, hydraulic pressure is started once, namely when the external pressure of the reverse circulation valve is higher than the internal pressure, the piston moves downwards to open a reverse circulation channel, and the piston cannot reset after annular pressure relief, namely the channel cannot be closed, so that the next construction of oil jacket communication cannot be normally carried out; and secondly, a hydraulic mechanism is not needed, a special switch tool for connecting a steel wire or a cable is needed to realize the switch of the reverse circulation channel, and although the structure can realize the repeated switch of the reverse circulation channel, the structure needs to assist the cooperation of the steel wire or the cable car, so that the construction cost is high, and the construction process is complicated.
Disclosure of Invention
The invention aims to provide a side drilling suspension-free disposable well cementation and completion device, which utilizes the functions of repeated automatic opening and closing of an automatic opening and closing reverse circulation valve and the function of releasing a forward tubular column of a reverse buckle release, avoids the feeding of a drill rod and the back-end tie-back, ensures the integrity and the tightness of a shaft, simplifies the construction procedures and flows, reduces the construction cost, provides a complete new shaft for the back-end fracturing, does not influence the later-end conventional oil extraction operation, and simultaneously avoids the cost and the work risk caused by the opening and closing of the reverse circulation valve by steel wire or cable operation.
The invention relates to a side drilling suspension-free disposable well cementation and completion device which comprises a side drilling casing, a left-hand thread release, an automatically-switched reverse circulation valve and a one-way leather cup packer, wherein the left-hand thread release, the automatically-switched reverse circulation valve and the one-way leather cup packer are arranged in the side drilling casing and are in threaded connection with the side drilling casing; but one-way packing cup packer's top is provided with automatic switch reverse circulation valve, but automatic switch reverse circulation valve's top is provided with the back-off release.
Furthermore, the reverse circulation valve capable of being automatically opened and closed comprises a body, an outer sleeve, a backwashing hole, a shear pin, a piston, a sealing ring liquid inlet hole, a spring, an anti-collision sleeve and a piston pressure relief hole; the upper part and the lower part of the body are both provided with external threads, the middle part of the body is provided with a liquid inlet hole and a piston pressure relief hole, and the liquid inlet hole is positioned at the upper part of the piston pressure relief hole;
the outer sleeve is arranged outside the body, the upper part of the outer sleeve is provided with internal threads, the upper part of the outer sleeve is connected with the body through the internal threads, and the outer sleeve is provided with a backwashing hole;
the lower part of the outer sleeve is provided with an internal thread, the outer sleeve is connected with the external thread of the anti-collision sleeve through the lower internal thread, the anti-collision sleeve is also provided with an internal thread, and the anti-collision sleeve is connected with the external thread through an internal thread body;
the piston is provided with a sealing ring, the piston is arranged between the body and the outer sleeve, and the piston is fixed with the outer sleeve through a shear pin;
further, a spring is arranged between the piston and the anti-collision sleeve.
Furthermore, the sidetracking suspension-free releasable well cementation completion device further comprises a bumping seat, a floating hoop floating shoe and a guiding device, wherein the guiding device is arranged at the top end of the bottom of the sidetracking casing, the floating hoop floating shoe is arranged above the guiding device and is in threaded connection with the lower part of the bumping seat, and the upper part of the bumping seat is in threaded connection with the sidetracking casing.
Furthermore, the sidetracked suspension-free releasable well cementation and completion device further comprises a well cementation rubber plug, wherein the well cementation rubber plug is locked in the bumping seat.
Further, the front part of the guiding device is hemispherical.
Furthermore, the float collar and the float shoe are single-flow valves.
Furthermore, the upper part and the lower part of the one-way packing cup packer are both connected with a sidetracking casing through threads.
Further, the sidetracking well casing is arranged in the original well casing.
Furthermore, the sidetracking well casing is in an L-shaped bent shape.
Furthermore, the back-off releasing tool, the automatic on-off reverse circulation valve and the one-way packing cup packer are sequentially arranged in the vertical section of the side drilling casing
The invention has the beneficial effects that: the side drilling hanging-free hand-losing well cementation and completion device provided by the invention adopts the well completion sleeve to be put in at one time, the integrity of the shaft is higher, meanwhile, the leakage points of the shaft are reduced, and the smooth fracturing construction in the later period is ensured; the construction link of well completion operation is simplified, and the construction cost and the running risk brought by the hanger are reduced. The later releasing success rate is high, and the running of the oil production pipe column is not influenced. Compared with the suspension well completion, the mode avoids the feeding of the drill rod and the later-stage tie-back, ensures the integrity and the sealing property of the shaft, simplifies the construction procedures and flows, reduces the construction cost, provides a complete new shaft for the later-stage fracturing, and does not influence the later-stage conventional oil production operation.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a sidetrack hang-free completion.
FIG. 2 is a schematic diagram of a reverse circulation valve capable of multiple automatic opening.
Fig. 3 is a schematic diagram of a back-off releasing structure.
FIG. 4 is a schematic structural view of a well cementing rubber plug.
In the figure: 1. casing the original well; 2. sidetrack drilling casing; 3. releasing the back-off; 4. the reverse circulation valve can be automatically switched on and off; 401. a body; 402. a jacket; 403. backwashing a hole; 404. shearing the nails; 405. a piston; 406. a seal ring; 407. a liquid inlet hole; 408. a spring; 409. an anti-collision sleeve; 410. a piston relief hole; 5. a one-way cup packer; 6. a bumping seat; 7. a float collar and a float shoe; 8. a guide device; 9. a well cementation rubber plug.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "aligned", "overlapping", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
As shown in figures 1 and 3, the invention provides a side drilling hanging-free disposable well cementation and completion device, which comprises a side drilling casing 2, a back-off releasing tool 3 arranged in the side drilling casing 2, an automatic on-off reverse circulation valve 4, a one-way packing cup packer 5 and the side drilling casing 2, wherein the back-off releasing tool is in threaded connection with the one-way packing cup packer 5; a reverse circulation valve 4 capable of being automatically opened and closed is arranged above the one-way cup packer 5, and a back-off releasing tool 3 is arranged above the reverse circulation valve 4 capable of being automatically opened and closed; the one-way cup packer 5 can bear certain upper pressure but allows annular liquid to flow upwards; in order to prevent the upper tubular column from being unable to be lifted out due to the fact that the back-off releasing tool 3 is fixed due to the fact that well cementation cement returns too high, cement paste above the back-off releasing tool 3 is circulated out of a shaft in a back-off mode through the reverse circulation valve 4 which can be automatically opened and closed after annular pressure relief, the reverse circulation valve 4 can be automatically opened and closed, and later-stage fracturing operation is not affected; after the fracturing operation is finished, the upper lateral drilling casing 2 is released from the back-off releasing part by positively rotating the tubular column through the wellhead, the upper lateral drilling casing 2 is lifted out, and the production oil pipe is lowered again. Compared with the suspension well completion, the mode avoids the feeding of the drill rod and the later-stage tie-back, ensures the integrity and the sealing property of the shaft, simplifies the construction procedures and flows, reduces the construction cost, provides a complete new shaft for the later-stage fracturing, and does not influence the later-stage conventional oil production operation.
Further, as shown in fig. 2, the automatically openable and closable reverse circulation valve 4 includes a body 401, an outer sleeve 402, a back washing hole 403, a shear pin 404, a piston 405, a sealing ring 406, a liquid inlet hole 407, a spring 408, an anti-collision sleeve 409, and a piston pressure relief hole 410; the upper part and the lower part of the body 401 are both provided with external threads, the middle part of the body 401 is provided with a liquid inlet hole 407 and a piston pressure relief hole 410, and the liquid inlet hole 407 is positioned at the upper part of the piston pressure relief hole 410;
the outer sleeve 402 is arranged outside the body 401, the upper part of the outer sleeve 402 is provided with internal threads, the upper part of the outer sleeve 402 is connected with the body 401 through the internal threads, and the outer sleeve 402 is provided with backwashing holes 403;
the lower part of the outer sleeve 402 is provided with an internal thread, the outer sleeve 402 is connected with the external thread of the anti-collision sleeve 409 through the lower internal thread, the anti-collision sleeve 409 is also provided with an internal thread, and the anti-collision sleeve 409 is in threaded connection through an internal thread body 401;
a sealing ring 406 is arranged on the piston 405, the piston 405 is arranged between the body 401 and the outer sleeve 402, and the piston 405 is fixed with the outer sleeve 402 through a shear pin 404; when the piston 405 moves down to the lower part of the liquid inlet 407, the piston pressure relief hole 410 ensures that the liquid at the lower part can be smoothly discharged; the anti-collision sleeve 409 is provided with an inner thread and an outer thread, is connected with the lower part of the outer sleeve 402 through the outer thread, is connected with the body 401 through the inner thread, and is sealed with the body 401 and the outer sleeve 402 through a sealing ring 406; the crush sleeve 409 prevents damage to the outer casing 402 from external forces during tool tripping and makes tool assembly easier.
Further, a spring 408 is arranged between the piston 405 and the anti-collision sleeve 409.
Further, the reverse circulation channel is composed of a backwashing hole 403, a piston 405, a sealing ring 406, a liquid inlet hole 407 and a spring 408, wherein the piston 405 is sealed with the body 401 and the outer sleeve 402 through the sealing ring 406; when the external pressure of the reverse circulation valve is higher than the internal pressure and reaches a certain value, the shear pin 404 is sheared under the action of the internal and external pressure difference, the piston 405 compresses the spring 408 to descend to the lower part of the liquid inlet 407, a reverse circulation channel is established, and liquid can enter the interior from the outside through the backwashing hole 403 and the liquid inlet 407; the piston pressure relief hole 410 enables liquid at the lower part of the piston 405 to be smoothly discharged, so that a reverse circulation channel is ensured to be smooth; at the moment, the lower thrust of the pressure difference between the inside and the outside of the reverse circulation valve on the piston 405 can keep the reverse circulation channel open only by overcoming the resilience force of the spring 408, and the annular redundant cement slurry can be reversely circulated out of the shaft; after the annular space pressure release, under the effect of spring 408 resilience force, piston 405 resets, and reverse circulation channel closes, does not influence later stage fracturing construction. If the reverse circulation channel needs to be opened again, only the annulus needs to pressurize, when the downward thrust of the internal and external pressure difference acting on the piston 405 is larger than the elastic force of the spring 408, the piston 405 moves downward again, the reverse circulation channel is opened, after the annulus is decompressed, the piston 405 resets under the action of the resilience force of the spring 408, and the channel is closed.
Furthermore, the sidetracking hanging-free releasable well cementation and completion device further comprises a collision pressure seat 6, a float collar float shoe 7 and a guide device 8, wherein the guide device 8 is arranged at the top end of the bottom of the sidetracking casing 2, the front part of the guide device 8 is hemispherical, and the resistance of a pipe column during running is reduced; a float collar float shoe 7 is arranged above the guide device 8, the float collar 7 is a check valve, the well control safety in the process of lowering the tubular column is ensured, liquid and cement slurry are allowed to pass through during circulation and well cementation, a reverse flow channel is closed during well cementation and waiting, and annular cement slurry is prevented from entering the inside of the lateral drilling casing 2; the floating collar and the floating shoe 7 are in threaded connection with the lower part of the bumping seat 6, and the upper part of the bumping seat 6 is in threaded connection with the lateral drilling casing 2.
Further, as shown in fig. 4, the sidetracked hanging-free releasable well cementation and completion device further comprises a well cementation rubber plug 9, wherein the well cementation rubber plug 9 plays a role in isolating cement slurry and displacing fluid, and meanwhile, after the displacement is finished, the well cementation rubber plug 9 is locked in the bumping seat 6, so that a double protection effect is achieved for preventing the floating shoe and the floating hoop 7 from failing.
Furthermore, the upper part and the lower part of the one-way cup packer 5 are connected with the sidetracking casing 2 through threads, so that the one-way cup packer can better bear upper pressure.
Further, the sidetracking casing 2 is arranged in the original well casing 1.
The side drilling hanging-free hand-losing well cementation completion device has the working principle that: after the sidetracking well is drilled, a well completion casing is directly put in and the well is fixed, and after the well is fixed, the mutual matching of the one-way leather cup packer 5, the automatically switched reverse circulation valve 4 and the reverse buckle release 3 is utilized to complete the well fixing, the reverse circulation and the pulling-out of the upper sidetracking well casing. Wherein, the upper part and the lower part of the one-way cup packer 5 are both connected with the lateral drilling casing 2 through threads, which can bear certain upper pressure but allow the liquid in the annulus to go upwards; in order to prevent the upper part of the well cementation cement from being lifted out due to the fact that the back-off releasing tool 3 is fixed due to overhigh upward return, cement paste above the back-off releasing tool 3 is circulated out of a shaft in a back-off mode through the reverse circulation valve 4 which can be automatically opened and closed after annular pressure relief, and the reverse circulation valve 4 can be automatically opened and closed without influencing later-stage fracturing operation. After the fracturing operation is finished, the upper lateral drilling casing 2 is released from the back-off release 3 by rotating the pipe column in the forward direction of the wellhead, the upper lateral drilling casing 2 is lifted out, and the production oil pipe is put into again. Compared with the suspension well completion, the mode avoids the feeding of the drill rod and the later-stage tie-back, ensures the integrity and the sealing property of the shaft, simplifies the construction procedures and flows, reduces the construction cost, provides a complete new shaft for the later-stage fracturing, and does not influence the later-stage conventional oil production operation.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides a sidetracking well is exempted from to hang and can be lost hand well cementation completion device which characterized in that: comprises a lateral drilling casing (2), a back-off release (3) arranged on the lateral drilling casing (2), a reverse circulation valve (4) capable of being automatically switched and a one-way leather cup packer (5); the one-way packing cup packer (5) is in threaded connection with the sidetracking casing (2); but one-way packing cup packer (5)'s top is provided with automatic switch reverse circulation valve (4), but the top of automatic switch reverse circulation valve (4) is provided with left-hand thread release (3).
2. The sidetracking hanging-free disposable cementing completion device according to claim 1, characterized in that: the reverse circulation valve (4) capable of being automatically opened and closed comprises a body (401), an outer sleeve (402), a backwashing hole (403), a shear pin (404), a piston (405), a sealing ring (406), a liquid inlet hole (407), a spring (408), an anti-collision sleeve (409) and a piston pressure relief hole (410); the upper part and the lower part of the body (401) are both provided with external threads, the middle part of the body (401) is provided with a liquid inlet hole (407) and a piston pressure relief hole (410), and the liquid inlet hole (407) is positioned at the upper part of the piston pressure relief hole (410);
the outer sleeve (402) is arranged outside the body (401), the upper part of the outer sleeve (402) is provided with internal threads, the upper part of the outer sleeve (402) is connected with the body (401) through the internal threads, and the outer sleeve (402) is provided with a backwashing hole (403);
the lower part of the outer sleeve (402) is provided with an internal thread, the outer sleeve (402) is connected with the external thread of the anti-collision sleeve (409) through the internal thread at the lower part, the anti-collision sleeve (409) is also provided with an internal thread, and the anti-collision sleeve (409) is in threaded connection through an internal thread body (401);
a sealing ring (406) is arranged on the piston (405), the piston (405) is arranged between the body (401) and the outer sleeve (402), and the piston (405) is fixed with the outer sleeve (402) through a shear pin (404);
and a spring (408) is also arranged between the piston (405) and the anti-collision sleeve (409).
3. The sidetracking hanging-free disposable cementing completion device according to claim 1, characterized in that: still press seat (6), float collar float shoe (7), guider (8) including bumping, guider (8) set up in the bottom top of sidetracking well casing pipe (2), the top of guider (8) is provided with float collar float shoe (7), float collar float shoe (7) and the lower part threaded connection who bumps seat (6), the upper portion and sidetracking well casing pipe (2) threaded connection who bumps seat (6).
4. The sidetracking hanging-free disposable cementing completion device according to claim 3, characterized in that: the well cementation rubber plug (9) is also included, and the well cementation rubber plug (9) is locked in the bumping seat (6).
5. The sidetracking hanging-free disposable cementing completion device according to claim 3, characterized in that: the front part of the guiding device (8) is hemispherical.
6. The sidetracking hanging-free disposable cementing completion device according to claim 3, characterized in that: the float collar and the float shoe (7) are single flow valves.
7. The sidetracking hanging-free disposable cementing completion device according to claim 3, characterized in that: the upper part and the lower part of the one-way packing cup packer (5) are both connected with the sidetracking casing (2) through threads.
8. The sidetracking hanging-free disposable cementing completion device according to claim 1, characterized in that: the sidetracking well casing (2) is arranged in the original well casing (1).
9. The sidetracking hanging-free disposable cementing completion device according to claim 1, characterized in that: the lateral drilling casing (2) is L-shaped and bent.
10. The sidetracking hanging-free disposable well cementing completion device according to claim 1 or 9, characterized in that: the back-off releasing tool (3), the automatic on-off reverse circulation valve (4) and the one-way packing cup packer (5) are sequentially arranged in the vertical section of the side drilling casing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110048789.8A CN112943161B (en) | 2021-01-14 | 2021-01-14 | Side drilling is exempted from to hang and can be lost hand well cementation well completion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110048789.8A CN112943161B (en) | 2021-01-14 | 2021-01-14 | Side drilling is exempted from to hang and can be lost hand well cementation well completion device |
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| CN112943161A true CN112943161A (en) | 2021-06-11 |
| CN112943161B CN112943161B (en) | 2022-11-04 |
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