CN216240489U - Pump-sealing integrated water plugging pipe column - Google Patents

Abstract

The utility model relates to a pump-sealing integrated water plugging pipe column which comprises an outer pipe column and an inner pipe column, wherein the outer pipe column comprises an upper joint, a first sieve pipe, an upper packer, an oil pipe, a lower packer, a second sieve pipe and a lower joint which are sequentially connected from top to bottom; the upper joint and the lower joint are respectively provided with a central hole which is communicated up and down, the first sieve tube is used for communicating an upper oil sleeve annulus above the upper packer, the second sieve tube is used for communicating a lower oil sleeve annulus below the lower packer, and the upper packer and the lower packer are respectively arranged at the upper side and the lower side of an upper stratum so as to seal the upper stratum; the upper end of the inner pipe column is connected in a central hole of the upper joint, the lower end of the inner pipe column is connected in a central hole of the lower joint, the inner pipe column and the outer pipe column are matched to form an annular space, the annular space is communicated with the first sieve pipe and the second sieve pipe, the upper end of the annular space is plugged by the upper joint, the lower end of the annular space is plugged by the lower joint, and an upward return channel for liquid in the oil sleeve annulus to return upwards is formed in the inner pipe column.

Description

Pump-sealing integrated water plugging pipe column

Technical Field

The utility model relates to a pump-sealing integrated water plugging pipe column.

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, high and low aquifers coexist, and in order to stabilize oil and control water, improve the ultimate recovery ratio, water plugging operation is often needed. At present, the most economical water plugging pipe column is a pump-sealed integrated water plugging pipe column, and when produced liquid has the conditions of oil pipe corrosion, scaling, wax deposition and the like, the pipe column is required to have the functions of annular medicine adding and well backwashing. In order to add chemicals and backwash a well from an annulus when the upper layer and the lower layer are sealed, an integrated pump-sealing water plugging pipe column is usually adopted, as shown in figure 1, an oil pipe, an upper screen pipe 3, an upper packer 4, a lower packer 5, a lower screen pipe 6 and a plug 7 are sequentially connected below an oil well pump 1, the upper packer 4 and the lower packer 5 are seated in a sleeve 2, and the upper packer 4 and the lower packer 5 are respectively positioned on the upper side and the lower side of an upper stratum 9, so that the upper stratum 9 can be sealed, and oil extraction is only carried out on a lower stratum 8. When annulus dosing is needed, the chemicals enter the oil pipe from the upper screen pipe 3, then are pumped to the ground by the oil well pump 1, the chemicals in the oil pipe below the upper screen pipe 3 cannot reach, and the parts of the oil pipe still have the conditions of corrosion, scaling, wax deposition and the like, so that the production reduction and the production stop of the oil well are caused in serious cases. During reverse well flushing, flushing fluid descends from the annular space of an oil sleeve on the upper part of the upper packer 4, enters the interior of the pipe column through the upper screen pipe 3, then upwards passes through the oil well pump 1 and returns to the ground, oil pipes below the upper screen pipe 3 cannot be subjected to hot washing and paraffin removal, oil well faults cannot be relieved, and pump detection and seal replacement operations are forced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pump-sealing integrated water plugging pipe column to solve the technical problem that oil pipes below an uppermost screen pipe cannot be protected and cleaned by adding chemicals and oil well faults are prone to occurring in the prior art.

In order to realize the purpose, the technical scheme of the pump-sealing integrated water plugging pipe column provided by the utility model is as follows: a pump-sealing integrated water plugging pipe column comprises an outer pipe column, wherein the outer pipe column comprises an upper joint, a first sieve pipe, an upper packer, an oil pipe, a lower packer, a second sieve pipe and a lower joint which are sequentially connected from top to bottom; the upper joint and the lower joint are both annular joints, the upper joint and the lower joint are respectively provided with a central hole which is communicated up and down, the first sieve tube is used for communicating an upper oil sleeve annulus above the upper packer, the second sieve tube is used for communicating a lower oil sleeve annulus below the lower packer, and the upper packer and the lower packer are respectively arranged at the upper side and the lower side of an upper stratum so as to seal the upper stratum; the pump-sealed integrated water plugging pipe column further comprises an inner pipe column, the upper end of the inner pipe column is connected in a center hole of the upper joint, the lower end of the inner pipe column is connected in a center hole of the lower joint, the inner pipe column and the outer pipe column are matched to form an annular space, the annular space is communicated with the first sieve pipe and the second sieve pipe, the upper end of the annular space is sealed by the upper joint, the lower end of the annular space is sealed by the lower joint, and an upward return channel for allowing liquid in the lower oil sleeve to return upwards is formed in the inner pipe column.

Has the advantages that: interior tubular column, outer tubular column cooperation form annular space, during the use, it is empty that the empty interior liquid of the lantern ring that oils enters into down the lantern ring through first screen pipe, annular space, second screen pipe, it is empty that the liquid in the lantern ring that down is gone up by the last passageway that returns in the interior tubular column returns to ground again, at this circulation in-process, each department of liquid flow tubular column guarantees all to add medicine and wash everywhere, prevents the condition such as corruption, wax deposition, scale deposit, prevents that the oil well from breaking down.

Preferably, the upper joint is a double-pipe joint, the lower end of the double-pipe joint is provided with a double-pipe joint external thread connected with the first sieve pipe, and the lower end of the double-pipe joint is also provided with a double-pipe joint internal thread connected with the upper end of the inner pipe column.

Preferably, the lower joint is an insert pipe joint, the insert pipe joint comprises a main body part fixedly arranged below the second sieve pipe, an upward extending sealing cylinder is fixedly arranged in a central hole of the main body part, and the lower end of the inner pipe column is inserted into the sealing cylinder. Interior tubular column and the cooperation of sealed cartridge can guarantee to float about realizing on sealed prerequisite and assemble, can guarantee during the use that interior tubular column links to each other with the top connection after, the top connection can link to each other with first screen pipe again.

Preferably, the sealing cartridge is threadedly mounted on the body portion. The connection of the sealing cylinder and the main body part is facilitated by adopting a threaded assembly mode.

Preferably, the inner tubular column comprises an upper central oil pipe and a lower insertion pipe, and the central oil pipe and the insertion pipe are arranged in a split manner.

Preferably, the upper end of the main body part is provided with an insert pipe joint internal thread, and the insert pipe joint internal thread is connected with the second screen pipe.

Preferably, the top of the sealing cylinder is provided with a conical guide section with a large upper part and a small lower part. The tapered guide section can guide the insertion of the cannula into the sealing cylinder.

Preferably, a third screen pipe and a plug are connected below the lower joint. And impurities at the bottom of the well can be prevented from entering the water plugging pipe column through the third sieve pipe and the plug.

Preferably, the upper packer is a Y111 packer and the lower packer is a Y211 or Y221 packer.

Preferably, the pump sealing integrated water shutoff pipe column further comprises an oil well pump connected above the upper joint.

Drawings

FIG. 1 is a schematic structural diagram of a pump-sealing integrated water shutoff pipe column in the prior art;

FIG. 2 is a schematic structural diagram of an embodiment of a pump-sealing integrated water shutoff pipe column provided by the utility model;

FIG. 3 is a schematic view of the double pipe joint of FIG. 2;

FIG. 4 is a schematic structural view of the union joint of FIG. 2;

FIG. 5 is an enlarged view taken at A in FIG. 4;

description of reference numerals:

1. an oil well pump; 2. a sleeve; 3. feeding a sieve tube; 4. an upper packer; 5. a lower packer; 6. feeding a screen pipe; 7. plugging with a thread; 8. a lower earth formation; 9. an upper earth formation; 10. a double pipe joint; 101. double-pipe joint internal threads; 102. double pipe joint external threads; 11. a first sieve tube; 12. an oil pipe; 13. a second sieve tube; 14. a cannula fitting; 141. a body portion; 142. an insert pipe joint internal thread; 143. a sealing cylinder; 144. a tapered guide section; 15. a third sieve tube; 16. a central oil pipe; 17. an oil feeding sleeve annulus; 18. an oil casing annulus is arranged; 19. inserting a tube; 20. an annular space.

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 utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. 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 utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

The utility model provides a concrete embodiment of a pump-sealing integrated water plugging pipe column, which comprises the following steps:

as shown in fig. 2 to 5, the pump-sealed integrated water plugging string comprises an outer string and an inner string which are sleeved together, the outer string is seated in the casing 2, and the inner string is fixed on the outer string.

The outer pipe column comprises an oil well pump 1, a double-pipe joint 10, a first sieve pipe 11, an upper packer 4, an oil pipe 12, a lower packer 5, a second sieve pipe 13, an insertion pipe joint 14, a third sieve pipe 15 and a plug 7 which are sequentially connected from top to bottom. The components can be directly connected by screw threads or indirectly connected by an oil pipe nipple. Wherein, the upper packer 4 is a Y111 packer, and the lower packer 5 is a Y211 or Y221 packer. The upper packer 4 and the lower packer 5 are set in the casing 2, and the upper packer 4 and the lower packer 5 are respectively arranged on two sides of the upper stratum 9 to seal the upper stratum 9. Wherein the first screen 11 is in communication with an upper oil jacket annulus 17 above the upper packer 4 and the second screen 13, the third screen 15 are in communication with a lower oil jacket annulus 18 below the lower packer 5.

The double pipe joint 10 has a structure as shown in fig. 3, the double pipe joint 10 is an annular joint, and has a central hole penetrating up and down, the upper end of the double pipe joint 10 has an upper end screw thread for connecting with an upper oil pipe, the outer side of the lower end has a double pipe joint external thread 102, the double pipe joint external thread 102 is connected with the first sieve pipe 11, the hole wall of the central hole of the lower end has a double pipe joint internal thread 101, and the double pipe joint internal thread 101 is used for connecting with an inner pipe column.

The structure of the pipe union 14 is shown in fig. 4, the pipe union 14 includes a main body 141, the main body 141 is a ring body, a central hole which is through from top to bottom is formed in the main body 141, the central hole of the pipe union 14 is a stepped hole which is thick at the top and thin at the bottom, a pipe union internal thread 142 is formed on a large hole section, a sealing cylinder 143 is installed on a small hole section in a threaded manner, the sealing cylinder 143 extends upwards, and the inner wall of the sealing cylinder 143 is smooth. The lower end of the spigot 14 is externally threaded for connection to a third screen 15. As shown in FIG. 5, a tapered guide section 144 is provided at the top of the sealing cylinder 143, and the tapered guide section 144 is large at the top and small at the bottom, and can guide the insertion tube 19 to enter.

The inner tubular column comprises an upper central oil pipe 16 and a lower insertion pipe 19, the upper end of the central oil pipe 16 is connected with the double-pipe joint internal thread 101 of the double-pipe joint 10, the lower end of the central oil pipe is connected with the insertion pipe 19, and the lower end of the insertion pipe 19 is inserted into the sealing barrel 143 and is in sealing fit with the sealing barrel 143.

The inner and outer tubular strings together form an annular space 20, the annular space 20 being closed at its upper end by the bottom surface of the double pipe joint 10 and at its lower end by the top surface of the spigot joint 14, and the annular space 20 communicating with the upper oil jacket annulus 17 through the first screen 11 and the lower oil jacket annulus 18 through the second screen 13.

When the annular space adds medicine, liquid medicine gets into annular space 20 from the annular space 17 that oils through first screen pipe 11, gets into oil jacket annular space 18 down through second screen pipe 13, gets into oil pipe under the pump through third screen pipe 15, spigot joint 14, intubate 19, central oil pipe 16, double-barrelled joint 10 after mixing with lower stratum 8 output liquid, finally takes out to ground by oil-well pump 1, and the liquid medicine flows through whole tubular column inner chamber, can play fine anticorrosive, scale control, wax control's effect.

During reverse well flushing, flushing fluid enters the annular space 20 from the upper oil sleeve annulus 17 through the first sieve tube 11, enters the lower oil sleeve annulus 18 through the second sieve tube 13, returns through the third sieve tube 15, the pipe inserting joint 14, the pipe inserting 19, the central oil tube 16, the double-pipe joint 10, the oil well pump 1 and the oil feeding pipe of the pump, and flows through the inner cavity of the whole pipe column, so that a good paraffin removal effect can be achieved.

In this embodiment, the double union 10 forms an upper union attached to the first screen 11 and the box union 14 forms a lower union attached to the second screen 13. Wherein, the inner channel of the inner pipe column forms an upward return channel for the liquid to return upward.

In the embodiment, the pump-sealing integrated water plugging pipe column comprises an oil well pump, in other embodiments, the oil well pump is omitted, and the added medicament is pumped in the oil pipe on the upper part of the double-pipe joint by using a sucker driven by a steel wire rope to realize circulating flow.

In this embodiment, the upper packer is a Y111 packer, and the lower packer is a Y211 or Y221 packer, and in other embodiments, the types of the upper and lower packers may be changed according to actual conditions, and preferably, the upper and lower packers are mechanically set packers.

In this embodiment, a third screen pipe and a plug are connected below the lower joint, and in other embodiments, the third screen pipe and the plug are eliminated, so that the inner tubular column is directly connected with the annular space of the lower oil casing.

In the embodiment, the top of the sealing cylinder is provided with a tapered guide section with a large upper part and a small lower part, and in other embodiments, the tapered guide section is eliminated.

In this embodiment, the upper end of the main body portion of the box connector has box connector internal threads for coupling to a second screen, and in other embodiments, the upper end of the main body portion of the box connector has box connector external threads for coupling to a second screen.

In this embodiment, the inner tubular column includes a central oil pipe and an insertion pipe, the central oil pipe and the insertion pipe are separately arranged, actually, the central oil pipe is formed by a plurality of sections of oil pipes, the insertion pipe is connected to the lowest section of oil pipe, and in other embodiments, the insertion pipe may be formed by the lowest section of central oil pipe.

In this embodiment, the sealing cartridge is threadably mounted to the body portion, and in other embodiments, the sealing cartridge may be welded directly to the body portion.

In this embodiment, the lower sub is a spigot-and-socket joint, the spigot-and-socket joint including a main body portion and a sealing barrel, in other embodiments, the lower sub may be a double pipe joint, and the lower end thread of the inner pipe string is fitted over the lower sub.

In this embodiment, the lower end of the double pipe joint has a double pipe joint external thread and a double pipe joint internal thread, and in other embodiments, the central hole in the double pipe joint is a stepped hole, so that two radially spaced double pipe joint internal threads are arranged at the lower end of the double pipe joint, the external double pipe joint internal thread is connected with the first sieve pipe, and the internal double pipe joint internal thread is connected with the inner pipe column.

Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides an integrative water shutoff tubular column of pump seal which characterized in that: the packer comprises an outer pipe column, wherein the outer pipe column comprises an upper joint, a first sieve pipe (11), an upper packer (4), an oil pipe (12), a lower packer (5), a second sieve pipe (13) and a lower joint which are sequentially connected from top to bottom; the upper joint and the lower joint are both annular joints, the upper joint and the lower joint are respectively provided with a central hole which is communicated up and down, the first sieve tube (11) is used for communicating an upper oil sleeve annulus (17) above the upper packer (4), the second sieve tube (13) is used for communicating a lower oil sleeve annulus (18) below the lower packer (5), and the upper packer and the lower packer are respectively arranged on the upper side and the lower side of the upper stratum (9) so as to seal the upper stratum (9); the pump seals integrative shutoff water tubular column still includes interior tubular column, and interior tubular column upper end is connected in the centre bore of top connection, and the lower extreme is connected in the centre bore of bottom connection, interior tubular column, outer tubular column cooperation form annular space (20), and this annular space (20) intercommunication first screen pipe (11) and second screen pipe (13), the upper end quilt of this annular space (20) the top connection shutoff, the lower extreme quilt the bottom connection shutoff, have in the interior tubular column and supply the last passageway that returns on the liquid in the oil jacket annular space (18) down.

2. The pump-sealing integrated water shutoff pipe column according to claim 1, characterized in that: the upper joint is a double-pipe joint (10), the lower end of the double-pipe joint (10) is provided with a double-pipe joint external thread (102) connected with the first sieve pipe (11), and the upper joint is also provided with a double-pipe joint internal thread (101) connected with the upper end of the inner pipe column.

3. The pump-sealing integrated water shutoff pipe column according to claim 1, characterized in that: the lower joint is an insert pipe joint (14), the insert pipe joint (14) comprises a main body part (141) fixedly arranged below the second sieve pipe (13), an upward extending sealing cylinder (143) is fixedly arranged in a central hole of the main body part (141), and the lower end of the inner pipe column is inserted into the sealing cylinder (143).

4. The pump-sealing integrated water shutoff pipe column according to claim 3, characterized in that: the sealing cylinder (143) is screw-fitted on the body portion (141).

5. The pump-sealing integrated water shutoff pipe column according to claim 3, characterized in that: the inner pipe column comprises an upper central oil pipe (16) and a lower insertion pipe (19), and the central oil pipe (16) and the insertion pipe (19) are arranged in a split mode.

6. The pump-sealing integrated water shutoff pipe column according to claim 3, characterized in that: the upper end of the main body part (141) is provided with an insert pipe joint internal thread (142), and the insert pipe joint internal thread (142) is connected with the second sieve pipe (13).

7. The pump-sealing integrated water shutoff pipe column according to claim 3, characterized in that: the top of the sealing cylinder (143) is provided with a tapered guide section (144) with a large upper part and a small lower part.

8. The pump-sealing integrated water shutoff string according to any one of claims 1 to 7, characterized in that: and a third sieve tube (15) and a plug (7) are connected below the lower joint.

9. The pump-sealing integrated water shutoff string according to any one of claims 1 to 7, characterized in that: the upper packer (4) is a Y111 packer, and the lower packer (5) is a Y211 or Y221 packer.

10. The pump-sealing integrated water shutoff string according to any one of claims 1 to 7, characterized in that: the pump-sealing integrated water plugging pipe column further comprises an oil well pump (1) connected above the upper joint.

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