CN113338919A - Blocking pipe column - Google Patents
Blocking pipe column Download PDFInfo
- Publication number
- CN113338919A CN113338919A CN202110661993.7A CN202110661993A CN113338919A CN 113338919 A CN113338919 A CN 113338919A CN 202110661993 A CN202110661993 A CN 202110661993A CN 113338919 A CN113338919 A CN 113338919A
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- Prior art keywords
- pipe
- pressure
- packer
- movable
- pressure compensation
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- 238000005065 mining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
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Classifications
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
- E21B33/12—Packers; Plugs
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
The invention relates to a blocking pipe column. A blocking pipe column comprises a plug, a first packer, a second packer, a sieve pipe and a pressure compensator, wherein the pressure compensator is connected between the plug and the second packer in series; the pressure compensator comprises an outer cylinder, a movable pipe and a spring, wherein a pressure compensation cavity is formed by the movable pipe and the outer cylinder in a surrounding mode, a pressure compensation hole is formed in the outer cylinder, and the pressure compensation hole is communicated with the lower portion of the pressure compensation cavity; the movable pipe has inboard bearing surface, outside bearing surface, when the deblocking to first packer and second packer, lift the tubular column, the pressure reduction of second packer below, the pressure reduction in the pressure compensation intracavity, when liquid pressure is greater than the liquid pressure in the pressure compensation intracavity in the stifled tubular column of card, the movable pipe moves down under the effort that the inboard bearing surface received, it controls to discharge into the sealing ring of second packer lower part with liquid in the pressure compensation intracavity, thereby reduced the vacuum effect below the second packer, reduce and know the required effort of sealing, the deblocking is more convenient.
Description
Technical Field
The invention relates to a blocking pipe column.
Background
The oil well productivity can be effectively improved by multi-oil-layer mining, but the oil layer needs to be effectively identified and cleaned in the mining process, and a targeted mining measure is made. At present, a double-plugging pipe column is usually adopted to test an oil layer, the double-plugging pipe column comprises a plug, a second packer, a sieve pipe and a first packer which are arranged from bottom to top, and the pipe column utilizes a double-stage packer to plug the upper side and the lower side of a target layer section, so that the influence of other oil layers is avoided, and the yield is accurately obtained. However, the following problems exist in the field construction process of the pipe column: after the stifled test of bottommost oil reservoir card is accomplished, need the packer deblocking to the bottommost, because the packer downside of bottommost forms sealed chamber, it is comparatively serious that the tubular column lifts deblocking in-process production vacuum effect, leads to tubular column deblocking load big, deblocking failure even.
Disclosure of Invention
The invention aims to provide a blocking pipe column convenient for deblocking.
The blocking pipe column adopts the following technical scheme:
a stuck string comprising:
the plug is used for plugging the bottom of the pipe column;
the first packer is positioned on the upper side of the plug and used for being seated in the sleeve;
the second packer is positioned on the upper side of the plug and on the lower side of the first packer and is matched with the first packer to seal the upper side and the lower side of the target interval by clamping;
the screen pipe is positioned between the first packer and the second packer and is communicated with an upper oil pipe of the pipe column;
the pressure compensator is connected between the plug and the second packer in series; the pressure compensator includes:
an outer cylinder;
the movable pipe is arranged in the outer cylinder in a sliding sealing manner, a pressure compensation cavity separated from the inner cavity of the sieve pipe is formed by the movable pipe and the outer cylinder in a surrounding manner, a pressure compensation hole for communicating the pressure compensation cavity with the outside of the pressure compensator is formed in the outer cylinder, and the pressure compensation hole is communicated with the lower part of the pressure compensation cavity;
a spring for applying an upward elastic force to the movable tube;
the movable pipe is provided with an inner side bearing surface which applies downward acting force to the movable pipe under the pressure of liquid in the blocking pipe column;
the movable pipe is also provided with an outer bearing surface used for forming a part of the inner wall surface of the pressure compensation cavity, and the outer bearing surface exerts an upward acting force on the movable pipe under the pressure of liquid in the pressure compensation cavity;
when the liquid pressure in the blocking pipe column is higher than that in the pressure compensation cavity, the movable pipe moves downwards under the action of the inner pressure bearing surface.
Has the advantages that: when the blocking pipe column is unsealed, the pipe column is lifted, the pressure below the second packer is reduced, the pressure in the pressure compensation cavity is reduced, when the liquid pressure in the blocking pipe column is higher than the liquid pressure in the pressure compensation cavity, the movable pipe moves downwards under the action force exerted on the inner side pressure bearing surface, and the liquid in the pressure compensation cavity is discharged into the sealing ring at the lower part of the second packer for controlling, so that the vacuum effect below the second packer is reduced, the action force required by unsealing is reduced, and the unsealing is more convenient.
Further, the movable tube includes the body and sets up at the annular arch of body upper end, and annular arch and urceolus sliding seal cooperation are passed through to the upper end of movable tube, the outside pressure-bearing surface of movable tube is L shape, and outside pressure-bearing surface includes and is in the vertical section of the protruding downside of annular on the bellied downside of annular and the body outer peripheral face. The movable pipe has simple structure and is convenient to process.
Further, the inner side pressure bearing surface of the movable pipe comprises an inner wall surface of the pipe body, an upper end surface of the pipe body, a lower end surface of the pipe body and an upper side surface of the annular bulge. The upper side of the annular bulge faces upwards, and large acting force can be applied to the movable pipe downwards.
Furthermore, the upper end of the spring is in press fit with the lower side surface of the annular bulge. The installation of the spring is convenient.
Furthermore, the outer cylinder comprises a cylinder body and an upper joint, the cylinder body and the upper joint are arranged in a split mode, the upper joint extends into the cylinder body, and the upper joint is used for being matched with the movable pipe in a blocking mode up and down so as to limit the upper limit position of the movable pipe. The movable pipe is convenient to install, and the movable pipe is prevented from falling off.
Further, the urceolus includes barrel, lower clutch, and the barrel sets up with the lower clutch components of a whole that can function independently, and the lower clutch is fixed at the barrel lower extreme and is stretched into in the barrel, and the movable tube lower extreme stretches into in the lower clutch and with the lower clutch about direction sliding seal cooperation. Compact structure and good stability of the movable tube.
Furthermore, the outer cylinder comprises an upper joint fixed with the upper end of the cylinder body, the upper joint extends into the cylinder body, and the upper joint is used for being matched with the movable pipe in a blocking mode up and down so as to limit the upper limit position of the movable pipe. The movable pipe is convenient to install, and the movable pipe is prevented from falling off.
Furthermore, the upper end surface of the lower joint is in abutting fit with the spring. The installation of the spring is convenient.
Further, the spring is located in the pressure compensation chamber. The spring has a more compact and stable structure in the pressure compensation cavity.
Furthermore, a stress shearing part is arranged between the movable pipe and the outer cylinder, and a movable pipe moving-up space for enabling the movable pipe to move upwards relative to the outer cylinder so as to increase the volume of the pressure compensation cavity after the stress shearing part is sheared by increasing the pressure in the pressure compensation cavity is arranged above the movable pipe. When setting, the annular space of the oil sleeve below the second packer is compressed, high-pressure liquid enters the pressure compensation cavity through the pressure compensation hole, when the pressure is too high, the stress shearing part is sheared, the movable pipe can move upwards at the moment, the volume of the pressure compensation cavity is increased, the pressure in the space below the second packer is further reduced, and setting is facilitated.
Drawings
FIG. 1 is a schematic view of a stuck pipe string according to an embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a pressure compensator in embodiment 1 of the stuck string according to the present invention;
FIG. 3 is a schematic diagram of a pressure compensator in embodiment 2 of the stuck string according to the present invention;
in the figure: 1. a plug; 2. a first packer; 3. a second packer; 4. a screen pipe; 5. an upper oil pipe; 6. a pressure compensator; 61. an outer cylinder; 611. a barrel; 612. an upper joint; 613. a lower joint; 62. a movable tube; 621. a pipe body; 622. an annular projection; 623. an outer bearing surface; 624. an inner bearing surface; 63. a pressure compensation chamber; 64. a pressure compensation hole; 7. a spring; 8. a force-bearing shear member; 9. an oil jacket annulus; 10. the movable tube moves upwards.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships that are assumed to be orientations or positional relationships, and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The features and properties of the present invention are described in further detail below with reference to examples.
The specific embodiment 1 of the blocking pipe column of the invention:
as shown in fig. 1 and 2, the blocking pipe column comprises a plug 1 for blocking the bottom of the pipe column, a first packer 2 arranged on the upper side of the plug 1 and used for setting in a casing, and a second packer 3 arranged on the lower side of the first packer 2, wherein in the embodiment, the plug 1 is a threaded plug. The second packer 3 is matched with the first packer 2 to seal the upper side and the lower side of the target layer section. The blocking pipe column also comprises a screen 4 between the first packer 2 and the second packer 3, and the screen 4 is communicated with an upper oil pipe 5 of the pipe column. A pressure compensator 6 is connected in series between the choke plug 1 and the second packer 3. In this embodiment, the first packer 2 is a Y111 packer and the second packer 3 is a Y211 packer.
The pressure compensator 6 comprises an outer cylinder 61 and a movable pipe 62, the movable pipe 62 is arranged in the outer cylinder 61 in a sliding and sealing mode, a pressure compensation cavity 63 separated from the inner cavity of the sieve tube 4 is formed by the movable pipe 62 and the outer cylinder 61 in a surrounding mode, a pressure compensation hole 64 for communicating the pressure compensation cavity 63 with the outside of the pressure compensator 6 is formed in the outer cylinder 61, and the pressure compensation hole 64 is communicated with the lower portion of the pressure compensation cavity 63. A spring 7 is provided in the pressure compensation chamber 63, and the spring 7 is used to apply an upward elastic force to the movable tube 62.
The movable pipe 62 is provided with an inner bearing surface and an outer bearing surface, and the inner bearing surface applies downward acting force to the movable pipe 62 under the pressure of liquid in the blocking pipe column; the outer pressure-receiving face, which forms a part of the inner wall surface of the pressure-compensating chamber, applies an upward force to the movable tube 62 under the pressure of the liquid in the pressure-compensating chamber 63. When the liquid pressure in the blocking pipe column is higher than the liquid pressure in the pressure compensation chamber 63, the movable pipe 62 is acted by a downward acting force on the inner side bearing surface and moves downward against the elastic force of the spring 7 and the upward acting force on the outer side bearing surface.
When to first packer 2 and the 3 deblocking of second packer, lift the tubular column after, the annular 9 internal pressure of oil jacket in 3 below of second packer reduces, and the pressure reduction in the pressure compensation chamber 63 can the downstream at activity pipe 62, with the annular 9 of oil jacket of the 3 lower parts of second packer of liquid discharge in the pressure compensation chamber 63 to reduced the vacuum effect of 3 below of second packer, reduced and know and seal required effort, it is more convenient to unseal.
In this embodiment, the movable tube 62 includes a tube 621 and an annular protrusion 622 disposed at the upper end of the tube 621, the upper end of the movable tube 62 is in sliding sealing fit with the outer cylinder 61 through the annular protrusion 622, the outer bearing surface 623 of the movable tube 62 is L-shaped, and the outer bearing surface 623 includes the lower side surface of the annular protrusion 622 and a vertical section on the outer peripheral surface of the tube 621 and located at the lower side of the annular protrusion 622. The inner bearing surface 624 of the movable tube 62 includes an inner wall surface of the tube body 621, an upper end surface of the tube body 621, a lower end surface of the tube body 621, and an upper side surface of the annular protrusion 622.
The outer barrel 61 comprises a barrel 611, an upper joint 612 and a lower joint 613, and the barrel 611, the upper joint 612 and the lower joint 613 are arranged in a split manner, so that the outer barrel can be conveniently machined and assembled. The upper joint 612 extends into the cylinder 611, and the lower end surface of the upper joint 612 is used for being matched with the upper end surface of the movable tube 62 in a stopping way so as to limit the upper limit position of the movable tube 62. The lower joint 613 is fixed at the lower end of the cylinder 611 and extends into the cylinder 611, and the lower end of the movable tube 62 extends into the lower joint 613 and is in up-and-down guiding sliding sealing fit with the lower joint 613. The upper end of the spring 7 is press-fitted with the lower side surface of the annular protrusion 622, and the lower end is press-fitted with the upper end surface of the lower joint 613, so that the structure is compact.
The upper end of the movable tube 62 is stopped by the upper joint 612, and the upper side surface of the annular protrusion 622 at the upper end of the movable tube 62 is in stop fit with the upper end surface of the movable tube 62, so that the structure is simple, and the movable range of the movable tube 62 is convenient to limit. The lower joint 613 and the movable pipe 62 are in up-and-down guiding sliding fit, so that the structure is simple and the processing is convenient.
In the pressure compensator 6 of the present invention, the projected area of the upward part of the inner pressure-bearing surface 624 in the horizontal plane is larger than the projected area of the downward part in the horizontal plane, so that the inner pressure-bearing surface 624 is forced downward by the pressure of the liquid in the blocking pipe column. In the outer pressure surface 623, the lower side surface of the annular projection 622 is forced upward by the hydraulic pressure in the pressure compensation chamber 63. The pressure compensation cavity is communicated with the oil casing annulus, and when the pressure in the oil casing annulus changes, the resultant force in the vertical direction on the movable pipe 62 changes.
The pressure compensation chamber 63 is enclosed by the movable tube 62 and the outer tube 61, wherein the upper side wall surface and the inner side wall surface of the pressure compensation chamber 63 are located on the movable tube 62, the lower side wall surface and the outer side wall surface are respectively located on the lower joint 613 and the cylinder 611, and when the pressure in the pressure compensation chamber 63 changes, the movable tube 62 can be used for conveniently setting the packer through the change of the movable compensation pressure relative to the cylinder 611.
When the pressure compensator 6 of the present invention is assembled, the lower joint 613 is connected to the cylinder 611, the spring 7 and the movable tube 62 are installed in the cylinder 611, and the upper joint 612 is fixed to the cylinder 611.
The blocking pipe column working principle is that when the oil layer III needs to be tested, the pipe column is lowered to the designed depth, the pipe column is lifted and lowered, the seat sealing of the first packer 2 and the second packer 3 is realized, and liquid in the oil layer III enters the oil pipe through the sieve pipe 4. When the second oil layer needs to be tested, the pipe column is lifted up to unseal the first packer 2 and the second packer 3, and then the pipe column is lifted and placed to the designed depth, so that blocking of the second oil layer is realized; when the oil layer one needs to be tested, the method is the same as the above mode, and is not described again.
When setting, block up the target layer through first packer 2 and 3 blocks up of second packer, when the deblocking, lift the tubular column, the annular internal pressure of oil jacket ring of 3 below of second packer reduces, pressure compensation chamber 63 internal pressure reduces, under the liquid pressure effect in the tubular column, activity pipe 62 activity down, pressure compensation chamber 63 volume reduces, the liquid outflow in the pressure compensation chamber 63, the influence of vacuum effect to the tubular column when having reduced to lift the tubular column, reduce and know the seal load, more be favorable to the deblocking.
In embodiment 2 of the stuck pipe column of the present invention, the structure of the stuck pipe column in this embodiment is different from that in the above embodiments only in that, in addition to the capability of reducing the deblocking load during deblocking, as shown in fig. 3, a stressed shear member 8 is disposed between a movable pipe 62 and an outer cylinder 61, and a movable pipe upward moving space 10 is disposed above the movable pipe 62, which is used for increasing the volume of the pressure compensation chamber 63 by moving the movable pipe 62 upward relative to the outer cylinder 61 after the pressure in the pressure compensation chamber 63 is increased to shear the stressed shear member 8. In this embodiment, the force-receiving shear member 8 is a shear pin. When setting, the annular space of the oil sleeve below the second packer 3 is compressed, high-pressure liquid enters the pressure compensation cavity 63 through the pressure compensation hole 64, when the pressure is too high, the stress shearing part 8 is sheared, the movable pipe 62 can move upwards at the moment, the volume of the pressure compensation cavity 63 is increased, the pressure of the space below the second packer 3 is further reduced, the setting tonnage is reduced, and setting is facilitated.
In the embodiment 3 of the blocking pipe column of the present invention, the structure of the blocking pipe column in this embodiment is different from the above embodiments only in that in this embodiment, the spring is located on the upper side of the movable pipe.
In embodiment 4 of the blocking pipe column of the present invention, the structure of the blocking pipe column in this embodiment is different from the above embodiments only in that in this embodiment, the outer pressure-bearing surface of the movable pipe further includes an upward outer downward pressed portion, and a projection area of the outer downward pressed portion in the horizontal plane is smaller than a projection of the lower side surface of the annular protrusion in the horizontal plane.
In the embodiment 5 of the blocking pipe column of the present invention, the structure of the blocking pipe column in this embodiment is different from that in the above embodiments only in that the movable pipe may not have an annular protrusion, and at this time, a thinned portion may be provided at the lower end of the movable pipe, wherein the thinned portion is inserted into the lower joint and is in sliding sealing engagement with the lower joint up and down.
In embodiment 6 of the blocking pipe column of the present invention, the structure of the blocking pipe column in this embodiment is different from that in the above embodiments only in that in this embodiment, the upper joint and the cylinder are integrated, and in other embodiments, the lower joint and the cylinder may also be integrated.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A stuck tubular string comprising:
the plug is used for plugging the bottom of the pipe column;
the first packer is positioned on the upper side of the plug and used for being seated in the sleeve;
the second packer is positioned on the upper side of the plug and on the lower side of the first packer and is matched with the first packer to seal the upper side and the lower side of the target interval by clamping;
the screen pipe is positioned between the first packer and the second packer and is communicated with an upper oil pipe of the pipe column;
the blocking pipe column comprises a pressure compensator, and the pressure compensator is connected between the plug and a second packer in series; the pressure compensator includes:
an outer cylinder;
the movable pipe is arranged in the outer cylinder in a sliding sealing manner, a pressure compensation cavity separated from the inner cavity of the sieve pipe is formed by the movable pipe and the outer cylinder in a surrounding manner, a pressure compensation hole for communicating the pressure compensation cavity with the outside of the pressure compensator is formed in the outer cylinder, and the pressure compensation hole is communicated with the lower part of the pressure compensation cavity;
a spring for applying an upward elastic force to the movable tube;
the movable pipe is provided with an inner side bearing surface which applies downward acting force to the movable pipe under the pressure of liquid in the blocking pipe column;
the movable pipe is also provided with an outer bearing surface used for forming a part of the inner wall surface of the pressure compensation cavity, and the outer bearing surface exerts an upward acting force on the movable pipe under the pressure of liquid in the pressure compensation cavity;
when the liquid pressure in the blocking pipe column is higher than that in the pressure compensation cavity, the movable pipe moves downwards under the action of the inner pressure bearing surface.
2. The stuck pipe column according to claim 1, wherein the movable pipe comprises a pipe body and an annular protrusion arranged at the upper end of the pipe body, the upper end of the movable pipe is in sliding sealing fit with the outer cylinder through the annular protrusion, the outer bearing surface of the movable pipe is L-shaped, and the outer bearing surface comprises the lower side surface of the annular protrusion and a vertical section on the outer circumferential surface of the pipe body, which is positioned at the lower side of the annular protrusion.
3. The stuck pipe string as recited in claim 2, wherein the inner bearing surface of the movable pipe comprises an inner wall surface of the pipe body, an upper end surface of the pipe body, a lower end surface of the pipe body, and an upper side surface of the annular protrusion.
4. The stuck string as recited in claim 2 wherein the upper end of the spring is in abutting engagement with the underside of the annular boss.
5. The blocking pipe column according to any one of claims 1 to 4, wherein the outer cylinder comprises a cylinder body and an upper joint, the cylinder body and the upper joint are arranged separately, the upper joint extends into the cylinder body, and the upper joint is used for being matched with the movable pipe in a stopping manner up and down so as to limit the upper limit position of the movable pipe.
6. The blocking pipe column according to any one of claims 1 to 4, wherein the outer cylinder comprises a cylinder body and a lower joint, the cylinder body and the lower joint are arranged separately, the lower joint is fixed at the lower end of the cylinder body and extends into the cylinder body, and the lower end of the movable pipe extends into the lower joint and is in up-and-down guiding sliding sealing fit with the lower joint.
7. The stuck pipe string as recited in claim 6 wherein the outer barrel includes an upper connector secured to the upper end of the barrel, the upper connector extending into the barrel and the upper connector adapted to engage the movable tube in an up and down stop to limit the upper limit of the movable tube.
8. The plugging string according to claim 6, wherein the upper end surface of the lower connector is in press fit with the spring.
9. The stuck string as recited in any one of claims 1-4 wherein the spring is in a pressure compensating chamber.
10. The blocking pipe column according to any one of claims 1 to 4, wherein a stressed shearing member is disposed between the movable pipe and the outer cylinder, and a space for moving the movable pipe upward is disposed above the movable pipe, wherein the space for moving the movable pipe upward relative to the outer cylinder is provided after the stressed shearing member is sheared by the pressure increase in the pressure compensation chamber, so as to increase the volume of the pressure compensation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661993.7A CN113338919B (en) | 2021-06-15 | Blocking tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110661993.7A CN113338919B (en) | 2021-06-15 | Blocking tubular column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113338919A true CN113338919A (en) | 2021-09-03 |
| CN113338919B CN113338919B (en) | 2024-05-17 |
Family
ID=
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499570Y (en) * | 2001-10-12 | 2002-07-10 | 中国石油天然气股份有限公司 | Double cavity type anti-block downhole chemical blending valve |
| CN201297145Y (en) * | 2008-05-23 | 2009-08-26 | 禹栽星 | Limit anchor used for chemical water plugging of oil well |
| RU92689U1 (en) * | 2009-11-09 | 2010-03-27 | Общество с ограниченной ответственностью "Научно-производственная фирма Завод "Измерон" | PACKER WITH CABLE INPUT |
| CN202300216U (en) * | 2011-10-19 | 2012-07-04 | 中国石油化工股份有限公司 | Connecting device for deblocking down-hole string |
| US20140014352A1 (en) * | 2011-03-30 | 2014-01-16 | Welltec A/S | Downhole pressure compensating device |
| CN111577179A (en) * | 2020-06-05 | 2020-08-25 | 中国石油化工股份有限公司 | Movable bottom plug |
| CN111997564A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Integrative water-plugging pipe column of looking for of bottom block and pump seal moves about |
| CN111997563A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Pump-sealing integrated water finding and blocking pipe column and moving bottom block thereof |
| CN112855098A (en) * | 2021-02-19 | 2021-05-28 | 大庆市天德忠石油科技有限公司 | Water plugging pipe column |
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499570Y (en) * | 2001-10-12 | 2002-07-10 | 中国石油天然气股份有限公司 | Double cavity type anti-block downhole chemical blending valve |
| CN201297145Y (en) * | 2008-05-23 | 2009-08-26 | 禹栽星 | Limit anchor used for chemical water plugging of oil well |
| RU92689U1 (en) * | 2009-11-09 | 2010-03-27 | Общество с ограниченной ответственностью "Научно-производственная фирма Завод "Измерон" | PACKER WITH CABLE INPUT |
| US20140014352A1 (en) * | 2011-03-30 | 2014-01-16 | Welltec A/S | Downhole pressure compensating device |
| CN202300216U (en) * | 2011-10-19 | 2012-07-04 | 中国石油化工股份有限公司 | Connecting device for deblocking down-hole string |
| CN111577179A (en) * | 2020-06-05 | 2020-08-25 | 中国石油化工股份有限公司 | Movable bottom plug |
| CN111997564A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Integrative water-plugging pipe column of looking for of bottom block and pump seal moves about |
| CN111997563A (en) * | 2020-08-04 | 2020-11-27 | 中国石油化工股份有限公司 | Pump-sealing integrated water finding and blocking pipe column and moving bottom block thereof |
| CN112855098A (en) * | 2021-02-19 | 2021-05-28 | 大庆市天德忠石油科技有限公司 | Water plugging pipe column |
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