CN212716567U

CN212716567U - Pump-sealing integrated water finding and blocking pipe column and oil production system

Info

Publication number: CN212716567U
Application number: CN202021017200.5U
Authority: CN
Inventors: 秦世群; 王登辉; 王学宏; 马宏伟; 王小勇; 张峰; 林波; 陈旭波
Original assignee: China Petroleum and Chemical Corp; Sinopec Henan Petroleum Exploration Bureau No 1 Oil Production Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Henan Petroleum Exploration Bureau No 1 Oil Production Plant
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-03-16
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to a pump seals integrative water logging tubular column and oil recovery system of looking for. Integrative water shutoff tubular column of looking for of pump seal includes: the oil pipe is sequentially connected with an oil pump, an upper packer, a sieve pipe, a lower packer and a floating bottom plug from top to bottom; further comprising: the anti-deposition breather is connected to the oil pipe between the sieve pipe and the lower packer and comprises a connecting base body and a breathing pipe; the connecting base body is of a tubular structure, and two ends of the connecting base body are connected to corresponding pipe column sections of the oil pipe; the breathing tube is arranged at one end of the connecting base body, and the diameter of the breathing tube is smaller than that of the connecting base body so as to form an annular space with the oil pipe; an opening of one end, far away from the connecting base body, of the breathing tube is provided with a blocking structure, and a breathing hole is formed in the breathing tube and is used for communicating the annular space with an inner cavity of the breathing tube; or, the respiratory tube is kept away from the one end orientation of connecting the base member and is connected the base member and buckle, and the respiratory tube constitutes the mouth of breathing towards the opening of connecting the base member, and the mouth of breathing is used for communicateing annular space and the inner chamber of respiratory tube.

Description

Pump-sealing integrated water finding and blocking pipe column and oil production system

Technical Field

The utility model relates to a pump seals integrative water logging tubular column and oil recovery system of looking for.

Background

In the middle and later stages of oil field development, particularly in the later stage of exploitation of water injection oil field, along with the change of the water content of the stratum, the interval division is thinner and thinner, the contradiction between the layers is more and more prominent, the high and low aquifers coexist, and in order to know the oil layer and stabilize and control oil and water, water plugging operation is often needed. At present, the common pipe column in water finding and blocking operation is a pump-sealing integrated double-sealing water finding and blocking pipe column, as shown in figure 1, an upper packer 2, a sieve pipe 3, a lower packer 4 and a plug 5 are sequentially connected on an oil pipe 6 below an oil well pump 1, when a lowest oil layer 8 is singly produced, because the tail of the oil pipe 6 is connected with the plug 5, a dead cavity can be formed between a sleeve 7 below the lower packer 4 and the oil pipe 6 after the two packer seats are sealed, and therefore, a piston effect can be formed in the lower packer 4 deblocking process, so that deblocking load is increased and deblocking is difficult.

In order to solve the problems, a plug connected with the tail of an oil pipe can be replaced by a movable bottom plug, as shown in fig. 2, the movable bottom plug mainly comprises a sleeve 9 and a piston 10, the piston 10 can reciprocate up and down in the sleeve 9, when the packer is unpacked, a pipe column is lifted, upper liquid can push the piston 10 to move downwards, and the space below the lower packer 4 is reduced, so that the resistance required to be overcome by the piston effect when the packer is unpacked is reduced, the up-and-down pressure of the piston 10 is balanced, and the piston effect is eliminated, so that the problems of overlarge unpacking load and difficulty in unpacking due to the piston effect formed when the packer is unpacked are solved. However, when the pipe column is in use, particularly when the oil layer production liquid contains mud and fine silt, the oil layer production liquid with the mud and the fine silt enters the oil pipe from the sieve pipe, then production operation is realized through the oil well pump, the mud and the fine silt in the oil layer production liquid are easy to deposit in the sleeve of the floating bottom plug, and after the mud and the fine silt are deposited to a certain degree, the piston is blocked, so that the floating bottom plug is invalid, the normal deblocking of the pipe column is further influenced, and overhaul operation is caused when the mud and the fine silt are serious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pump seal integrated water finding and blocking pipe column, which solves the technical problems that in the prior art, mud and fine silt in oil layer output liquid are easy to deposit in a sleeve of a moving bottom block, so that the moving bottom block fails and normal deblocking of the pipe column is influenced; an object of the utility model is to provide an oil recovery system to solve among the prior art in the oil layer produce the mud in the liquid and fine silt deposit easily in moving about the end stifled sleeve, lead to moving about end stifled inefficacy, and then influence the technical problem of the normal deblocking of tubular column.

In order to achieve the purpose, the utility model discloses pump seals integrative technical scheme who looks for stifled water pipe post is:

integrative water shutoff tubular column of looking for of pump seal includes:

the oil pipe is sequentially connected with an oil pump, an upper packer, a sieve pipe, a lower packer and a floating bottom plug from top to bottom;

further comprising:

the anti-deposition breather is connected to the oil pipe between the sieve pipe and the lower packer and comprises a connecting base body and a breathing pipe;

the connecting base body is of a tubular structure, and two ends of the connecting base body are connected to corresponding pipe column sections of the oil pipe;

the breathing tube is arranged at one end of the connecting base body and is communicated with the connecting base body, and the diameter of the breathing tube is smaller than that of the connecting base body so as to form an annular space with the oil pipe;

an opening of one end, far away from the connecting base body, of the breathing tube is provided with a blocking structure, and a breathing hole is formed in the breathing tube and used for communicating the annular space with an inner cavity of the breathing tube; or, the respiratory tube is kept away from the one end orientation of connecting the base member and is connected the base member and buckle, and the respiratory tube constitutes the mouth of breathing towards the opening of connecting the base member, and the mouth of breathing is used for communicateing annular space and the inner chamber of respiratory tube.

The beneficial effects are that: because the pump seals and looks for and blocks up the water pipe column to have the anti-deposition breather integrally, make the piston upper side that moves about the bottom block can only communicate with oil line through the breather hole, while the oil-well pump is working, the produced fluid enters the annular space that oil line and breather pipe enclose first through the screen pipe, pump out through the oil-well pump; because the breathing tube is provided with the breathing hole on the pipe wall or the breathing tube forms the breathing hole towards the opening of connecting the base member, make mud matter and fine sand in the output liquid be difficult to enter into the breathing tube through breathing hole or breathing hole, but can reach ground through the oil-well pump together along with the output liquid, consequently can avoid impurity deposit to block up the piston on the piston of the end of moving about and die the piston, lead to the end of moving about and block up inefficacy, guarantee the normal seat of tubular column and deblocking.

Furthermore, the outer peripheral surface of the connecting base body is provided with external threads, and the breathing tube is inserted in the tube cavity of the connecting base body.

The beneficial effects are that: respiratory tube cartridge can increase respiratory tube and the area of contact who is connected the base member in the lumen of connecting the base member, guarantees respiratory tube and the stability of being connected the base member.

Furthermore, the outer peripheral face of the end, close to the connecting base body, of the breathing pipe is provided with an external thread, the inner cavity of the end, close to the breathing pipe, of the connecting base body is provided with an internal thread, and the breathing pipe is in threaded connection with the connecting base body.

The beneficial effects are that: the respiratory tube is comparatively convenient with connection base member threaded connection, sets up respiratory tube and connection base member components of a whole that can function independently moreover, the respiratory tube of being convenient for and the processing of connecting the base member.

Further, the plugging structure is a plug, and the plug is in threaded connection with an opening of the breathing tube.

The beneficial effects are that: the plug connection is convenient, and the plugging of the respiratory tube is convenient to realize.

Furthermore, the plugging structure is a sealing plate welded and fixed at the opening of the breathing tube.

The beneficial effects are that: the shrouding welding is in the opening part of breathing tube, guarantees the stability of opening shutoff.

Further, the breathing hole is disposed proximate to the occluding structure.

The beneficial effects are that: under the condition that the length of the breathing tube is the same, the breathing hole is ensured to have enough height.

Further, the breathing holes are arranged at intervals along the circumferential direction of the breathing tube, and the number of the breathing holes is at least two.

The beneficial effects are that: when the piston in the floating bottom plug moves up and down, the liquid can enter and exit the breathing tube.

Further, the position of the breathing hole or the breathing port is higher than that of the sieve tube.

The beneficial effects are that: therefore, impurities such as mud, fine silt and the like in the produced liquid are more difficult to enter the breathing tube through the breathing hole, and the piston of the moving bottom plug is further ensured not to be blocked.

Further, the screen is disposed proximate the lower packer and distal to the upper packer.

The beneficial effects are that: therefore, impurities such as mud, fine silt and the like in the produced liquid are not easy to deposit in the oil sleeve annulus above the lower packer, and the lower packer is prevented from being buried.

In order to achieve the above object, the utility model discloses oil recovery system's technical scheme is:

the oil extraction system comprises a casing and a pump-seal integrated water finding and plugging pipe column, wherein the pump-seal integrated water finding and plugging pipe column is arranged in the casing;

integrative water shutoff tubular column of looking for of pump seal includes:

further comprising:

The beneficial effects are that: because the pump seals and looks for and blocks up the water pipe column to have the anti-deposition breather integrally, make the piston upper side that moves about the bottom block can only communicate with oil line through the breather hole, while the oil-well pump is working, the produced fluid enters the annular space that oil line and breather pipe enclose first through the screen pipe, pump out through the oil-well pump; because the breathing tube is provided with the breathing hole on the tube wall or the breathing tube faces the opening connected with the base body to form the breathing opening, the mud and the fine sand in the produced liquid are not easy to enter the breathing tube through the breathing hole or the breathing opening and reach the ground along with the produced liquid through the oil well pump, so that the phenomenon that the piston is blocked by impurity deposition on the piston of the moving bottom plug can be avoided, the failure of the moving bottom plug is caused, and the normal setting and deblocking of the tubular column are ensured.

Further, the breathing hole is disposed proximate to the occluding structure.

Drawings

FIG. 1 is a schematic structural diagram of a pump-seal integrated double-seal water finding and blocking pipe column in the prior art;

FIG. 2 is a schematic structural view of the plug in FIG. 1 replaced with a floating bottom plug;

fig. 3 is a schematic structural view of an embodiment 1 of the pump-sealing integrated water plugging pipe column of the present invention;

FIG. 4 is a schematic structural view of the anti-deposition respirator of FIG. 3;

FIG. 5 is a schematic structural view of the floating bottom plug of FIG. 3;

in fig. 1 and 2: 1-oil well pump; 2-setting a packer; 3-a sieve tube; 4-lower packer; 5-plugging with a thread; 6-oil pipe; 7-a sleeve; 8-oil layer; 9-a sleeve; 10-a piston;

in fig. 3 to 5: 21-oil well pump; 22-upper packer; 23-a screen; 24-lower packer; 25-a sleeve; 26-oil pipe; 27-a cannula; 28-oil layer; 29-pressure spring; 30-a piston; 31-a connection base; 32-a breathing tube; 33-plug; 34-a breathing hole; 35-oil pipe port; 36-internal thread section; 37-inner convex ring; a 38-O ring seal; 39-baffle ring; 40-a cannula communication port; 41-screw thread connection structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to 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. Furthermore, the terms "upper" and "lower" are based on the orientation and positional relationship shown in the drawings and are only for convenience of description of the present invention, and do not indicate that the referred device or component must have a specific orientation, and thus, 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 utility model discloses pump seals integrative specific embodiment 1 who looks for stifled water pipe post:

as shown in fig. 3, the pump-seal integrated water finding and plugging string comprises a tubing 26, the tubing 26 being formed of a plurality of serially connected string sections. An oil pump 21 is arranged in the oil pipe 26, the upper end of the oil pump 21 is connected with a sucker rod, and the sucker rod drives the oil pump 21 to perform oil pumping operation. An upper packer 22 and a lower packer 24 are connected to the tubing 26 below the pump 21, the upper packer 22 and the lower packer 24 are spaced in the up-down direction, and the upper packer 22 and the lower packer 24 are seated on a casing 27 for separating oil layers 28.

In this embodiment, the upper packer 22 is a Y111 packer, and the lower packer 24 is a Y211 packer, wherein the Y111 packer and the Y211 packer are mature products in the prior art.

The oil pipe 26 is connected with a sieve tube 23, the sieve tube 23 is positioned between the upper packer 22 and the lower packer 24, the oil pipe 26 is also connected with an anti-deposition breather and a floating bottom plug, the anti-deposition breather is positioned between the sieve tube 23 and the lower packer 24, and the floating bottom plug is positioned below the lower packer 24.

As shown in fig. 3 and 5, the floating bottom plug comprises a sleeve 25, the sleeve 25 extends vertically, an oil pipe through hole 35 is formed in the upper end of the sleeve 25, the oil pipe through hole 35 is communicated with an oil pipe 26, a sleeve communicating hole 40 is formed in the lower end of the sleeve 25, and the sleeve communicating hole 40 is communicated with an oil sleeve annulus below the lower packer 24.

In this embodiment, the upper end of the sleeve 25 is provided with an internal thread section 36, and the sleeve 25 is in threaded connection with the oil pipe 26 through the internal thread section 36. The sleeve 25 is hermetically and slidably assembled with a piston 30, two O-shaped sealing rings 38 are arranged on the piston 30, and the piston 30 is in sliding and sealing fit with the sleeve 25. The piston 30, when moved up and down within the sleeve 25, is capable of adjusting the internal volume of the casing 27 below the lower packer 24, thereby changing the hydraulic pressure below the lower packer 24.

The piston 30 has an upper limit position and a lower limit position in a reciprocating stroke, an inner annular ring 37 is arranged on the inner wall surface of the sleeve 25, the inner annular ring 37 is positioned on the lower side of the internal thread section 36, a pressure spring 29 is clamped between the inner annular ring 37 and the piston 30, and the pressure spring 29 applies acting force to the piston 30 towards the sleeve communicating opening 40. A stop ring 39 for limiting the downward movement stroke of the piston 30 is arranged below the piston 30 in the sleeve 25.

Before the packer is set, the piston 30 is elastically pressed against the stop ring 39 under the elastic force of the compression spring 29 to be in a lower limit position, namely the initial position of the piston 30. The piston 30 is prevented from coming out of the lower portion of the sleeve 25 when moving downward by the retainer ring 39. To facilitate assembly of piston 30 and compression spring 29, a retainer ring 39 is threadably connected to sleeve 25.

As shown in fig. 3 and 4, the anti-deposition respirator includes a connecting base 31 and a breathing tube 32. Specifically, connect the base member 31 and be tubular structure, the both ends of connecting the base member 31 all have threaded connection structure 41, and is preferred, and threaded connection structure 41 is for setting up the external screw thread on connecting the base member 31 outer peripheral face, connects the external screw thread connection that the base member 31 passes through both ends on oil pipe 26, and it is comparatively convenient to connect, the dismouting of being convenient for. Wherein the threaded connection 41 constitutes an oil pipe connection. In other embodiments, the oil pipe connection structure is a welded connection structure, that is, two ends of the connection base are connected to the oil pipe by welding. Wherein, the threaded connection structure of the upper end and the lower end of the connection base body 31 is a conical structure, so that the connection base body 31 is connected with the pipe column section of the oil pipe 26.

The upper end of connecting base member 31 still is equipped with the internal thread hole, and the lower extreme of breathing tube 32 is equipped with the external screw thread, and the lower extreme threaded connection of breathing tube 32 is downthehole at the internal thread of connecting the base member 31 upper end to realize breathing tube 32 and the intercommunication of connecting base member 31. Breathing pipe 32 is comparatively convenient with being connected base member 31 threaded connection, sets up breathing pipe 32 with being connected base member 31 components of a whole that can function independently moreover, is convenient for breathing pipe 32 and the processing of connecting base member 31.

As shown in fig. 3 and 4, the diameter of the breathing tube 32 is smaller than that of the connection base 31, and an annular space for the produced liquid to flow out is formed between the breathing tube 32 and the oil pipe 26. The opening part of the end, far away from the connecting base body 31, of the breathing tube 32 is provided with a plug 33, the plug 33 is a blind plug with internal threads, the upper end of the breathing tube 32 is provided with external threads, the plug 33 is in threaded connection with the breathing tube 32 to plug the opening of the breathing tube 32, the plug 33 forms a plugging structure, and the plug 33 mainly plugs the upper end of the breathing tube 32 to prevent sediment from falling into the breathing tube 32.

A breathing hole 34 is arranged on the tube wall of the breathing tube 32, and the breathing hole 34 is used for communicating the annular space with the inner cavity of the breathing tube 32 and providing a liquid inlet and outlet channel for the up-and-down movement of the piston 30 in the floating bottom plug; the breathing hole 34 is arranged close to the plug 33 to prevent impurities such as mud, fine silt and the like in the produced liquid from entering the breathing hole 34, and the piston 30 of the floating bottom plug is ensured not to be blocked. In this embodiment, the breathing holes 34 are circular holes extending along the radial direction of the breathing tube 32, and two breathing holes 34 are arranged along the circumferential direction of the breathing tube 32. In other embodiments, the shape of the breathing orifice may be elliptical, polygonal, etc.; and the number of the breathing holes can be set according to the requirement, such as one or more than three.

As shown in fig. 3, the position of the breathing hole 34 is higher than that of the sieve tube 23, so that impurities such as mud, fine silt and the like in the produced liquid are less likely to enter the breathing tube 32 through the breathing hole 34, and the piston 30 with the swimming bottom block is further ensured not to be blocked.

In the embodiment, the sieve tube 23 is arranged close to the lower packer 24 and far away from the upper packer 22, preferably, the sieve tube 23 is directly connected to the connecting base body 31 of the deposition prevention breather, and the connecting base body 31 of the deposition prevention breather is directly connected to the lower packer 24, so that impurities such as mud, fine silt and the like in the produced liquid are not easy to deposit in an oil jacket annular space above the lower packer 24, the lower packer 24 is prevented from being buried, and the lower packer 24 is guaranteed to be reliably unsealed.

When the packer is used, the pump seal integrated water plugging finding pipe column of the utility model is lowered to the well to design depth, the piston 30 in the floating bottom plug bears upward liquid pressure in the lowering process, at the moment, the pressure spring 29 can provide acting force opposite to the liquid pressure direction for the piston 30, namely, the pressure spring 29 provides downward acting force to buffer the piston 30, so that the piston is prevented from directly sliding to the upper limit position, and a space is provided for the piston 30 to move upwards when the packer is set; meanwhile, the pressure spring can also realize the resetting of the piston, so that the next action of the tubular column is facilitated.

Setting and unsetting of the packer are completed in a fixed stroke, the packer is set when the lowest oil layer 28 is singly produced, the pipe column is lifted by 0.8m to 1.2m, and then the pipe column is lowered so as to set the upper packer 22 and the lower packer 24. In the setting process, the oil sleeve annulus below the lower packer 24 is extruded, liquid in the oil sleeve annulus below the lower packer 24 pushes the piston 30 to move upwards by overcoming the elastic action force of the pressure spring 29, and meanwhile, the liquid above the piston 30 enters the annular space through the breathing hole 34 in the breathing tube 32, so that the space below the lower packer 24 is increased, and the liquid pressure below the lower packer 24 is reduced.

When the deblocking, lift the tubular column, make packer 22 and lower packer 24 all shift up to the deblocking position, the space below packer 24 can produce the negative pressure this moment, piston 30 moves down under the effect of negative pressure, reduce the space below packer 24, and simultaneously, liquid in the annular space enters into the piston 30 top through the breathing hole 34 on the breathing tube 32, prevent that the space below packer 24 is taken out into vacuum down, thereby because the resistance that piston effect need overcome when reducing the deblocking packer, balanced piston 30 is upper and lower pressure, eliminate piston effect.

In the process of oil pumping, because the anti-deposition breather is connected between the sieve tube 23 and the lower packer 24 on the oil tube 26, when the oil well pump 21 works, produced liquid enters an annular space defined by the oil tube 26 and the breathing tube 32 through the sieve tube 23 and then is pumped out through the oil well pump 21. Because the sieve tube 23 is arranged close to the lower packer 24 and the breathing hole of the breathing tube 32 is high, impurities in the produced liquid can not enter the breathing tube 32 through the breathing hole 34 but can be pumped to the ground along with the produced liquid through the oil pump, so that the situation that the piston 30 is blocked by the impurities deposited on the piston 30 of the floating bottom plug to cause the failure of the floating bottom plug can be avoided. In addition, the sieve tube 23 is arranged close to the lower packer 24, so that impurities in produced liquid are not easy to deposit too much in an oil sleeve annulus above the lower packer 24, and the condition that the lower packer 24 is buried to be dead and cannot be unsealed is avoided.

The utility model discloses pump seals integrative specific embodiment 2 who looks for stifled water pipe post:

the difference with specific embodiment 1 lies in, in embodiment 1, the opening part that respiratory tube 32 kept away from the one end of connecting base member 31 is equipped with the plug, be equipped with respiratory hole 34 on the respiratory tube 32, respiratory hole 34 is used for communicateing annular space and respiratory tube 32's inner chamber, respiratory hole 34 is close to the plug setting, in this embodiment, the opening that respiratory tube kept away from the one end of connecting the base member is not blockked, and this end is connected the base member and is buckled towards, the opening of respiratory tube is connected the base member towards promptly, the deposit in the oil pipe can not enter into the respiratory tube this moment, consequently can avoid impurity deposit on the piston of the end of swimming stifled and block up the piston. Wherein, the opening of the breathing tube in this embodiment constitutes the mouth of respiration, and the mouth of respiration provides liquid access way for the activity from top to bottom of the end inner piston that moves about, has avoided processing the breathing hole on the breathing tube.

The utility model discloses pump seals integrative specific embodiment 3 who looks for stifled water pipe post:

the difference from the specific embodiment 1 is that in embodiment 1, the blocking structure is a plug 33, and the plug 33 is used for blocking the upper end opening of the breathing tube 32, and in this embodiment, the blocking structure is a sealing plate welded at the upper end opening of the breathing tube. In other embodiments, the occluding structure is a cover integrally formed with the breathing tube; or the plugging structure is a sealing plate fixedly connected to an opening at the upper end of the breathing tube through a bolt.

The utility model discloses pump seals integrative specific embodiment 4 who looks for stifled water pipe post:

the difference from the embodiment 1 is that in the embodiment 1, the breathing tube 32 is screwed to the connection base 31, and in the embodiment, the breathing tube is welded to the connection base. In other embodiments, the breathing tube is integrally formed with the connection base; or the breathing tube is fixedly connected with the connecting base body through bolts.

The utility model discloses pump seals integrative specific embodiment 5 who looks for stifled water pipe post:

the difference from the specific embodiment 1 is that in the embodiment 1, the position of the breathing hole 34 is higher than that of the sieve tube 23, and in the embodiment, the position of the breathing hole is slightly lower than that of the sieve tube, at this time, the overall heights of the sieve tube and the breathing hole are both higher, so that the sediment deposited in the annular space enclosed by the breathing tube and the oil tube is not easy to enter the breathing hole.

The utility model discloses pump seals integrative specific embodiment 6 who looks for stifled water pipe post:

the difference from the embodiment 1 is that in the embodiment 1, the screen 23 is arranged close to the lower packer 24 and far from the upper packer 23, in this embodiment, the screen is arranged close to the upper packer and far from the lower packer, and the position of the breathing holes is still higher than that of the screen.

The utility model discloses pump seals integrative specific embodiment 7 who looks for stifled water pipe post:

the difference from embodiment 1 is that in embodiment 1, an external thread is provided on the outer peripheral surface of one end of the breathing tube 32 close to the connection base 31, an internal thread is provided in the lumen of one end of the connection base 31 close to the breathing tube 32, and the breathing tube 32 is screwed on the connection base 31.

The utility model discloses pump seals integrative specific embodiment 8 who looks for stifled water pipe post:

the difference from the embodiment 1 is that in the embodiment 1, the threaded connection structure connecting the upper end and the lower end of the base body 31 is a tapered structure so as to connect the base body 31 with the pipe string section of the oil pipe 26, and in the embodiment, the tapered structure is arranged at the upper end or the lower end of the base body. In other embodiments, both the upper and lower ends of the connection base may be cylindrical in configuration.

The utility model discloses pump seals integrative specific embodiment 9 who looks for stifled water pipe post:

the difference from embodiment 1 is that in embodiment 1, the breathing tube 32 is inserted into the connecting base 31 to be screwed with the connecting base 31, in this embodiment, the inner diameter of the breathing tube is the same as the inner diameter of the upper end of the connecting base, and the breathing tube is directly welded on the upper end face of the connecting base.

The utility model discloses oil recovery system's concrete embodiment, oil recovery system in this embodiment includes that the sleeve pipe seals integrative the water shutoff tubular column of looking for with the pump that sets up in the sleeve pipe, and this pump seals integrative the water shutoff tubular column and seals integrative any in the concrete embodiment 1-9 who looks for water shutoff tubular column with above-mentioned pump the structure the same, no longer give unnecessary details here.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. Integrative water shutoff tubular column of looking for of pump seal includes:

it is characterized by also comprising:

2. The pump-sealing integrated water finding and blocking pipe column as claimed in claim 1, wherein an external thread is arranged on the outer peripheral surface of the connecting base body, and the breathing pipe is inserted into a pipe cavity of the connecting base body.

3. The pump-sealing integrated water finding and blocking pipe column as claimed in claim 2, wherein an external thread is arranged on the outer peripheral surface of one end of the breathing pipe close to the connecting base body, an internal thread is arranged in the pipe cavity of one end of the connecting base body close to the breathing pipe, and the breathing pipe is in threaded connection with the connecting base body.

4. The pump-sealing integrated water finding and blocking pipe column as claimed in claim 1, 2 or 3, wherein the sealing structure is a plug screwed at the opening of the breathing pipe.

5. The pump sealing integrated water finding and blocking pipe column as claimed in claim 1, 2 or 3, wherein the sealing structure is a sealing plate welded and fixed at the opening of the breathing pipe.

6. The pump-sealing integrated water finding and blocking pipe column according to claim 1, 2 or 3, wherein the breathing hole is arranged close to the sealing structure.

7. The pump-sealing integrated water finding and blocking pipe column according to claim 1, 2 or 3, wherein at least two breathing holes are arranged at intervals along the circumferential direction of the breathing pipe.

8. The pump sealing integrated water finding and blocking pipe column according to claim 1, 2 or 3, wherein the position of the breathing hole or the breathing port is higher than the position of the sieve pipe.

9. The pump-seal integrated find-and-block water string as claimed in claim 1, 2 or 3, wherein the screen is disposed close to the lower packer and far from the upper packer.

10. An oil production system, comprising a casing and a pump-seal integrated water finding and plugging pipe column, wherein the pump-seal integrated water finding and plugging pipe column is arranged in the casing, and is characterized in that the pump-seal integrated water finding and plugging pipe column is the pump-seal integrated water finding and plugging pipe column in any one of claims 1-9.