CN212272146U - Layered water exploration production integrated pipe column - Google Patents
Layered water exploration production integrated pipe column Download PDFInfo
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- CN212272146U CN212272146U CN202020409132.0U CN202020409132U CN212272146U CN 212272146 U CN212272146 U CN 212272146U CN 202020409132 U CN202020409132 U CN 202020409132U CN 212272146 U CN212272146 U CN 212272146U
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Abstract
The utility model relates to a layering water detection production integration tubular column, include from last to the oil-well pump, screen pipe, first packer, first liquid accuse water detection switch, second packer, the second liquid accuse water detection switch and the plug of connecting in proper order down. The first hydraulic control water finding switch comprises a first outer pipe, an annular groove is formed in the inner wall of the first outer pipe, a first sliding sleeve is sleeved in the first outer pipe, a step sleeve with the outer diameter expanded is formed on the upper portion of the first sliding sleeve upwards, and the step sleeve is embedded in the annular groove in a sealing mode. A plurality of first feed liquor holes have been seted up on first outer tube pipe wall, and first outer tube and first sliding sleeve are fixed through first pin, and the second hydraulic control is looked for the water switch and is normally opened and look for the water switch. The utility model discloses a tubular column is the compound tubular column that can realize looking for water and produce, and the tubular column is gone into the back alright in order to begin production zone production down, directly suppresses alright produce zone production on switching when needing the layer change, need not to play tubular column, easy operation repeatedly.
Description
Technical Field
The utility model relates to a machinery in oil recovery engineering field looks for stifled water technology, especially relates to a layering water exploration production integration tubular column, and specially adapted needs the vertical well of lower first later layering exploitation order.
Background
In recent years, with the implementation of production increasing schemes such as increasing the number of wells, prolonging the production time, handling multiple times of oil wells and the like by water injection and steam injection measures, the water content of an oil well gradually rises, particularly the water content of a thin oil well is obviously increased, the oil yield is reduced, and the contradiction among oil well layers is increasingly prominent.
In the prior art, aiming at thin oil exploitation, a water exploration pipe column is generally required to be put in firstly, and the oil-water content of each layer is determined through liquid suction; and then according to the obtained data, a related water plugging production pipe column is put in, and the high water-bearing stratum is plugged for oil extraction production. The whole operation process is separated from the water detection by layers and production, and the pipe column needs to be repeatedly pulled out and put down, so that the operation is complex.
Therefore, the inventor provides a layered water exploration production integrated pipe column by means of experience and practice of related industries for many years, so as to overcome the defects of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a layering water exploration production integration tubular column is the compound tubular column that can realize water exploration and production, and the tubular column is gone into the back alright in order to begin production zone production down, directly suppress when needing the layer change alright with the production zone production on switching, need not to play tubular column, easy operation repeatedly.
The utility model aims at realizing the layered water exploration production integrated pipe column, which comprises an oil well pump, a sieve pipe, a first packer, a first hydraulic control water exploration switch, a second packer, a second hydraulic control water exploration switch and a plug which are sequentially connected from top to bottom; the first hydraulic control water finding switch comprises a first outer pipe, an annular groove is formed in the inner wall of the first outer pipe, a first sliding sleeve is sleeved in the first outer pipe, and a stepped sleeve with the outer diameter expanded is formed at the upper part of the first sliding sleeve upwards; the stepped sleeve is embedded in the annular groove in a sealing manner, a certain moving distance is reserved between the lower end face of the stepped sleeve and the lower side groove wall of the annular groove, and the lower outer wall of the first sliding sleeve is in sealing contact with the inner wall of the first outer pipe; a plurality of first liquid inlet holes are formed in the pipe wall of the first outer pipe and at intervals along the circumferential direction of the first outer pipe at positions corresponding to the step sleeves, and the first outer pipe and the first sliding sleeve are fixed through first pins; the second hydraulic control water finding switch is a normally open water finding switch.
The utility model discloses an in a preferred embodiment, the displacement is greater than the axial distance between the lower pore wall in up end and the first feed liquor hole of first sliding sleeve.
In a preferred embodiment of the present invention, the first sliding sleeve portion corresponding to the lower portion of the stepped sleeve on the wall of the first outer tube is provided with an exhaust hole, and the exhaust hole is communicated with the annular space formed by the moving distance.
In a preferred embodiment of the present invention, the first outer tube includes a first upper connection tube, a first connection tube and a first lower connection tube which are sequentially fixed from top to bottom, a stepped hole with an enlarged diameter is formed downward on the inner wall of the lower portion of the first upper connection tube, and the annular groove is formed between the stepped hole and the top surface of the first connection tube; the first liquid inlet hole and the exhaust hole are formed in the hole wall of the stepped hole, the inner diameter of the first sliding sleeve is smaller than the inner diameter of the first upper connecting pipe and the inner diameter of the first connecting pipe, and the outer wall of the lower portion of the first sliding sleeve is in sealing contact with the inner wall of the upper end of the first connecting pipe.
In a preferred embodiment of the present invention, the lower end inner wall of the first upper connecting pipe is in threaded connection with the upper end outer wall of the first connecting pipe, and the lower end outer wall of the first connecting pipe is in threaded connection with the upper end inner wall of the first lower connecting pipe; and a sealing ring is respectively sleeved between the outer wall of the stepped sleeve and the inner wall of the stepped hole above the first liquid inlet hole, between the inner wall of the upper end of the first connecting pipe and the outer wall of the lower end of the first sliding sleeve and between the outer wall of the lower part of the first connecting pipe and the inner wall of the upper end of the first lower connecting pipe.
In a preferred embodiment of the present invention, the second hydraulic control water detection switch includes a second outer tube, and a second sliding sleeve is hermetically sleeved in the second outer tube and fixed to the second outer tube by a second pin; a first limiting convex ring with a reduced diameter is formed on the inner wall of the second outer pipe and below the second sliding sleeve, and a certain sliding distance is reserved between the lower end face of the second sliding sleeve and the upper end face of the first limiting convex ring; a plurality of second liquid inlet holes are formed in the pipe wall of the second outer pipe at intervals along the circumferential direction of the second outer pipe, and a plurality of third liquid inlet holes which can be correspondingly communicated with the second liquid inlet holes are formed in the pipe wall of the second sliding sleeve along the circumferential direction of the second sliding sleeve; and a sealing ball is also arranged in the second outer pipe and above the second sliding sleeve, and the diameter of the sealing ball is larger than the inner diameter of the second sliding sleeve.
The utility model discloses a preferred embodiment, the second outer tube includes from last to taking over under taking over, second connecting pipe and the second is taken over under fixed in proper order the second down, and the second is taken over and is fixed through second pin and second sliding sleeve on, and the second feed liquor hole is seted up on taking over on the second, and foretell first spacing bulge loop forms under the second on taking over.
In a preferred embodiment of the present invention, the inner wall of the lower end of the second upper connecting pipe is downward formed into a first stepped pipe with an enlarged diameter, the inner wall of the lower end of the first stepped pipe is in threaded connection with the outer wall of the upper end of the second connecting pipe, and the second liquid inlet hole is formed in the pipe wall of the stepped pipe; the inner wall of the upper end of the second lower connecting pipe upwards forms a second stepped pipe with an enlarged diameter, and the outer wall of the lower end of the second connecting pipe is in threaded connection with the inner wall of the upper end of the second stepped pipe; the shaft shoulder at the lower end of the second stepped pipe forms the first limiting convex ring; the inner diameter of the second upper connecting pipe is the same as that of the second connecting pipe, the inner diameter of the second lower connecting pipe is smaller than that of the second connecting pipe, and the outer wall of the lower end of the second sliding sleeve is in sealing contact with the inner wall of the upper end of the second connecting pipe.
The utility model discloses an in a preferred embodiment, overlap respectively between the upper end outer wall of second sliding sleeve and the second upper connecting pipe inner wall, between the lower extreme outer wall of second sliding sleeve and the upper end inner wall of second connecting pipe and between the lower part outer wall of second connecting pipe and the second lower upper end inner wall of taking over and establish a sealing washer.
The utility model discloses an among the preferred embodiment, sliding distance is greater than the last pore wall in third inlet hole and the axial distance between the second connecting pipe up end, is less than the axial distance between the lower terminal surface of the sealing washer that second sliding sleeve upper end outer wall was established and the side on the second pin.
In a preferred embodiment of the present invention, the shearing pressure of the first pin is greater than the shearing pressure of the second pin.
The utility model discloses an in the preferred embodiment, still connect an anticorrosive nipple joint respectively between first packer and first liquid accuse water finding switch and between second packer and the second liquid accuse water finding switch.
From the above, the tubular column in the utility model can separate the upper production zone from the lower production zone after the first packer and the second packer are set, and through the cooperation of the first hydraulic control water finding switch and the second hydraulic control water finding switch, the production of the lower production zone can be directly started after each packer is set, which is simple and convenient; when needing to switch to the production of the upper production layer, need not any operation to the tubular column, direct pump truck is suppressed and can be traded the layer and succeed, trades the layer action and has obvious pressure registration change, can directly observe, and the effect is directly perceived reliable. The whole operation process does not need to repeatedly pull out the tubular column, and the two-layer water exploration and synchronous production can be realized by putting in the tubular column once. Meanwhile, the first hydraulic control water finding switch ingeniously utilizes the difference of the cross sectional areas of the upper end surface and the lower end surface of the first sliding sleeve, the first sliding sleeve can move downwards by utilizing the pressure difference between the two sides of the first sliding sleeve when the first hydraulic control water finding switch is pressed, and the structure is simpler.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: do the utility model provides a structural schematic of layering water exploration production integration tubular column.
FIG. 2: for the utility model provides a structure schematic diagram when first liquid accuse water detection switch is in to close.
FIG. 3: for the utility model provides a structure schematic diagram when first liquid accuse water detection switch is in to open.
FIG. 4: do the utility model provides a second hydraulic control water detection switch is in the structural schematic diagram when opening.
FIG. 5: do the utility model provides a second hydraulic control water detection switch is in the structure schematic diagram when closing.
The reference numbers illustrate:
10. an oil well pump;
20. a screen pipe;
30. a first packer;
40. a first hydraulic control water finding switch;
41. a first outer tube; 411. a first upper adapter tube; 4111. a first liquid inlet hole; 4112. an exhaust hole; 412. a first connecting pipe; 413. a first lower adapter tube;
42. a first sliding sleeve;
43. a first pin;
50. a second packer;
60. a second hydraulic control water finding switch;
61. a second outer tube; 611. a second upper adapter tube; 6111. a second liquid inlet hole; 6112. a second limit convex ring; 612. a second connecting pipe; 613. a second lower adapter tube; 6131. a first limit convex ring;
62. a second sliding sleeve; 621. a third liquid inlet hole;
63. a second pin;
64. a sealing ball;
70. plugging with a thread;
80. an anti-corrosion short section;
91. an upper production layer; 92. and (5) a lower production layer.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the embodiment provides a layered water exploration integrated tubular column, which comprises an oil well pump 10, a screen pipe 20, a first packer 30, a first hydraulic control water exploration switch 40, a second packer 50, a second hydraulic control water exploration switch 60, and a plug 70, which are connected in sequence from top to bottom.
The first hydraulic control water finding switch 40 includes a first outer tube 41, an annular groove is formed on the inner wall of the first outer tube 41, a first sliding sleeve 42 is sleeved in the first outer tube 41, and a stepped sleeve with an expanded outer diameter is formed at the upper part of the first sliding sleeve 42. The ladder sleeve is embedded in the annular groove in a sealing mode and can move in the annular groove along the axial direction of the first outer pipe 41, a certain moving distance is reserved between the lower end face of the ladder sleeve and the lower side groove wall of the annular groove, and the outer wall of the lower portion of the first sliding sleeve 42 is in sealing contact with the inner wall of the first outer pipe 41. A plurality of first liquid inlet holes 4111 are formed in the tube wall of the first outer tube 41 at intervals along the circumferential direction of the first outer tube and at positions corresponding to the step sleeves, and the first outer tube 41 and the first sliding sleeve 42 are fixed by a first pin 43. The second hydraulic control water detection switch 60 is a normally open water detection switch.
Specifically, the inner diameter of the first sliding sleeve 42 is smaller than the inner diameter of the first outer tube 41, and the first packer 30 and the second packer 50 are constructed in the prior art, for example, the first packer 30 can be a Y111 packer, and the second packer 50 can be a Y211 packer. The first pin 43 penetrates through the wall of the first outer tube 41 along the radial direction of the first outer tube 41 and is inserted into the outer wall of the first sliding sleeve 42, a threaded hole is generally formed in the wall of the first outer tube 41 and between two adjacent first liquid inlet holes 4111, a groove is formed in the outer wall of the first sliding sleeve 42 corresponding to each threaded hole, and each first pin 43 is inserted into each threaded hole and the corresponding groove. The number of the first liquid inlet holes 4111 and the first pins 43 is determined according to actual needs, for example, four first liquid inlet holes 4111 and four first pins 43 are provided in the present embodiment.
As shown in fig. 2 and 3, in the initial state, the first pilot-controlled water detecting switch 40 is in the closed state because the stepped sleeve blocks each first liquid inlet hole 4111. When the layer needs to be changed and the first outer tube 41 is pressed, the cross-sectional area of the upper end surface of the first sliding sleeve 42 is the sum of the cross-sectional area of the lower end surface of the first sliding sleeve 42 and the cross-sectional area of the shaft shoulder at the lower end of the stepped sleeve, so that the cross-sectional area of the upper end surface of the first sliding sleeve 42 is larger than that of the lower end surface thereof. Meanwhile, the step sleeve is in sealing contact with the annular groove, and the outer wall of the lower part of the first sliding sleeve 42 is in sealing contact with the inner wall of the first outer tube 41, so that the shaft shoulder at the lower end of the step sleeve is not subjected to internal pressure, and only the upper end surface of the first sliding sleeve 42 and the lower end surface of the first sliding sleeve 42 are subjected to internal pressure.
In addition, because the wellbore is deep, the length of the ladder sleeve is short compared with the depth of the wellbore, and the pressure at the upper end face of the first sliding sleeve 42 can be approximately equal to the pressure at the lower end face of the first sliding sleeve 42, so the force applied to the upper end face of the first sliding sleeve 42 is greater than the force applied to the lower end face of the first sliding sleeve 42, and the first sliding sleeve 42 is pushed downwards under the action of the pressure difference at the two ends of the first sliding sleeve 42 until the first pin 43 is cut off (the pressure of the first pin 43 that is cut off is generally determined according to the difference between the cross-sectional areas of the upper end face and the lower end face of the first sliding sleeve 42). After the cutting, the first sliding sleeve 42 slides downwards until the lower end shaft shoulder of the step sleeve abuts against the lower side groove wall of the annular groove, the step sleeve and the first liquid inlet hole 4111 are staggered, and the first hydraulic control water detection switch 40 is opened.
In detail, the whole working process of the pipe column is as follows: in use, the tubing string is run into position using tubing, and the first packer 30 and the second packer 50 separate the upper production zone 91 from the lower production zone 92 by raising and lowering the set first packer 30 and the set second packer 50. At this time, since the first hydraulic switch 40 is turned off and the second hydraulic switch is turned on, the pump 10 can directly pump the lower production zone 92 after starting to work.
During pumping, the oil-water content of the pumped liquid can be observed, and if the lower production zone 92 contains less water, production is maintained; if the lower productive layer 92 contains more water, the layer changing operation is started, specifically: the pipeline of the pump truck is connected to the wellhead to pressurize the oil casing annulus, hydraulic pressure is transmitted to the inner cavities of the first hydraulic control water exploration switch 40 and the second hydraulic control water exploration switch 60 through the sieve tube 20, when the pressure is slowly increased to a certain value (increased to 18Mpa in the embodiment), the pressure can be suddenly reduced to 0Mpa (the pressure gauge on the pump truck can be directly observed in the process through observation at the wellhead), at the moment, layer changing is successful, so far, the first hydraulic control water exploration switch 40 is in an open state, the second hydraulic control water exploration switch 60 is in a closed state, and after the oil well pump 10 recovers to work, the upper production layer 91 can be sucked. The whole layer changing operation is irreversible, and the whole pipe column can only be changed once.
Therefore, the tubular column in the embodiment can separate the upper production zone 91 from the lower production zone 92 after the first packer 30 and the second packer 50 are set, and the production of the lower production zone 92 can be directly started after the packers are set through the matching of the first hydraulic control water detection switch 40 and the second hydraulic control water detection switch 60, so that the tubular column is simple and convenient; when needing to switch to the production of the upper production layer 91, need not any operation to the tubular column, direct pump truck is suppressed and can be traded the layer and succeed, trades the layer action and has obvious pressure registration change, can directly observe, and the effect is directly perceived reliable. The whole operation process does not need to repeatedly pull out the tubular column, and the two-layer water exploration and synchronous production can be realized by putting in the tubular column once. Meanwhile, the first hydraulic control water exploration switch 40 skillfully utilizes the difference of the cross sectional areas of the upper end surface and the lower end surface of the first sliding sleeve 42, and the first sliding sleeve 42 can move downwards by utilizing the pressure difference between the two sides of the first sliding sleeve when being pressed, so that the structure is simpler.
In a specific implementation manner, in order to ensure that the positions of the step sleeve and the first liquid inlet hole 4111 can be staggered when the lower end shaft shoulder of the step sleeve abuts against the lower side groove wall of the annular groove, as shown in fig. 2, the above-mentioned moving distance is greater than the axial distance between the upper end surface of the first sliding sleeve 42 and the lower hole wall of the first liquid inlet hole 4111, so as to ensure that the first liquid-control water-finding switch 40 can be smoothly opened when the layer is pressed and changed.
In practical applications, in order to make the first sliding sleeve 42 slide downward more smoothly, as shown in fig. 2, a vent hole 4112 is formed in a portion of the first sliding sleeve 42 on the wall of the first outer tube 41 and corresponding to the lower portion of the step sleeve, and the vent hole 4112 is communicated with an annular space formed by the moving distance, so as to prevent the sliding of the first sliding sleeve 42 from being affected by the air pressure existing in the annular space. The number of the vent holes 4112 is determined according to the requirement, and for example, one vent hole 4112 is provided in this embodiment.
For convenience of processing and installation, as shown in fig. 2, the first outer tube 41 includes a first upper connection tube 411, a first connection tube 412 and a first lower connection tube 413 fixed in sequence from top to bottom, a stepped hole with an enlarged diameter is formed downward on the lower inner wall of the first upper connection tube 411, and the above-mentioned annular groove is formed between the stepped hole and the top surface of the first connection tube 412. The first liquid inlet hole 4111 and the exhaust hole 4112 are formed in the wall of the stepped hole. The inner diameter of the first sliding bush 42 is smaller than the inner diameter of the first upper connection pipe 411 and the inner diameter of the first connection pipe 412, and the lower outer wall of the first sliding bush 42 is in sealing contact with the upper inner wall of the first connection pipe 412.
Specifically, a lower end inner wall of the first upper connection pipe 411 is threadedly coupled to an upper end outer wall of the first connection pipe 412, and a lower end outer wall of the first connection pipe 412 is threadedly coupled to an upper end inner wall of the first lower connection pipe 413.
In order to ensure the sealing performance during the pressurization, a sealing ring is respectively sleeved between the outer wall of the stepped sleeve and the inner wall of the stepped hole above the first liquid inlet hole 4111, between the inner wall of the upper end of the first connecting pipe 412 and the outer wall of the lower end of the first sliding sleeve 42, and between the outer wall of the lower part of the first connecting pipe 412 and the inner wall of the upper end of the first lower connecting pipe 413. Generally, annular grooves are respectively formed on the outer wall of the upper end of the stepped sleeve, the inner wall of the upper end of the first connecting pipe 412 and the inner wall of the upper end of the first lower connecting pipe 413, and each sealing ring is respectively sleeved in each annular groove to realize sealing.
Further, as shown in fig. 4 and 5, the second hydraulic switch 60 includes a second outer tube 61, and a second sliding sleeve 62 is sealingly sleeved in the second outer tube 61 and fixed to the second outer tube 61 by a second pin 63. A first limit convex ring 6131 with a reduced diameter is formed on the inner wall of the second outer tube 61 and below the second sliding sleeve 62, and a certain sliding distance is reserved between the lower end face of the second sliding sleeve 62 and the upper end face of the first limit convex ring 6131. A plurality of second liquid inlet holes 6111 are formed in the pipe wall of the second outer pipe 61 at intervals along the circumferential direction, and a plurality of third liquid inlet holes 621 which can be correspondingly communicated with the second liquid inlet holes 6111 are formed in the pipe wall of the second sliding sleeve 62 along the circumferential direction. A sealing ball 64 is also arranged in the second outer tube 61 and above the second sliding sleeve 62, and the diameter of the sealing ball 64 is larger than the inner diameter of the second sliding sleeve 62.
The second pin 63 is generally located above the second liquid inlet hole 6111, and the second pin 63 radially penetrates through a threaded hole formed in the tube wall of the second outer tube 61 and is inserted into a groove formed in the outer wall of the second sliding sleeve 62. The number of the second pins 63 is determined as needed, and for example, two second pins 63 are provided in the present embodiment. The material of the sealing ball 64 may be selected, for example, the sealing ball 64 is an alloy ball in this embodiment.
In the initial state, since the second liquid inlet hole 6111 and the third liquid inlet hole 621 are in the conducting state, the whole second hydraulic control water detection switch 60 is in the open state. When the pipe string is put in, the sealing ball 64 is put in along with the pipe string, after the two packers are sealed, the oil well pump 10 can directly pump the lower production zone 92, and at the moment, the sealing ball 64 and the upper end face of the second sliding sleeve 62 form a check valve structure.
When layer changing operation needs to be carried out, the pump truck pressurizes the oil sleeve annulus, hydraulic pressure is transmitted to the inner cavity of the second hydraulic control water searching switch 60 through the sieve tube 20, the hydraulic pressure pushes the sealing ball 64 downwards, the sealing ball 64 pushes the second sliding sleeve 62, when the hydraulic pressure reaches a certain value, the second pin 63 is cut off, the sealing ball 64 continues to push the second sliding sleeve 62 to slide downwards after being cut off until the lower end face of the second sliding sleeve 62 abuts against the upper end face of the first limiting convex ring 6131, at the moment, the third liquid inlet 621 is staggered with the second liquid inlet 6111, and the second hydraulic control water searching switch 60 is closed.
In a specific implementation process, in order to ensure the sealing performance when the upper end of the second sliding sleeve 62 contacts the sealing ball 64, the inner side of the upper end of the second sliding sleeve 62 is a tapered surface which is gradually enlarged upwards.
For convenience of processing and installation, as shown in fig. 4, the second outer tube 61 includes a second upper connection tube 611, a second connection tube 612 and a second lower connection tube 613 which are sequentially fixed from top to bottom, the second upper connection tube 611 is fixed with the second sliding sleeve 62 by the second pin 63, the second liquid inlet hole 6111 is opened on the second upper connection tube 611, and the first limit protruding ring 6131 is formed on the second lower connection tube 613.
Specifically, for convenience of connection, a first stepped pipe with an enlarged diameter is formed downward on the inner wall of the lower end of the second upper connecting pipe 611, the inner wall of the lower end of the first stepped pipe is in threaded connection with the outer wall of the upper end of the second connecting pipe 612, and the second liquid inlet hole 6111 is formed on the pipe wall of the stepped pipe. The inner wall of the upper end of the second lower connecting pipe 613 forms a second stepped pipe with an enlarged diameter, the outer wall of the lower end of the second connecting pipe 612 is in threaded connection with the inner wall of the upper end of the second stepped pipe, and the shaft shoulder of the lower end of the second stepped pipe forms the first limit convex ring 6131. The inner diameter of the second upper connection pipe 611 is the same as that of the second connection pipe 612, the inner diameter of the second lower connection pipe 613 is smaller than that of the second connection pipe 612, and the outer wall of the lower end of the second sliding sleeve 62 is in sealing contact with the inner wall of the upper end of the second connection pipe 612.
In order to ensure the sealing performance during pressurization, a sealing ring is respectively sleeved between the outer wall of the upper end of the second sliding sleeve 62 and the inner wall of the second upper connection pipe 611, between the outer wall of the lower end of the second sliding sleeve 62 and the inner wall of the upper end of the second connection pipe 612, and between the outer wall of the lower end of the second connection pipe 612 and the inner wall of the upper end of the second lower connection pipe 613. Generally, annular grooves are respectively formed in the upper outer wall of the second sliding sleeve 62 and above the second pin 63, the upper inner wall of the second connecting pipe 612, and the upper inner wall of the second lower connecting pipe 613, and each sealing ring is respectively sleeved in each annular groove to achieve sealing.
In practical application, because the position of the second pin 63 is not sealed, in order to ensure that the sealing ring at the upper end of the second sliding sleeve 62 is still located above the second pin 63 when the lower end surface of the second sliding sleeve 62 abuts against the upper end surface of the first limiting convex ring 6131, and simultaneously ensure that the positions of the third liquid inlet hole 621 and the second liquid inlet hole 6111 can be staggered, as shown in fig. 4, the sliding distance is greater than the axial distance between the upper hole wall of the third liquid inlet hole 621 and the upper end surface of the second connecting pipe 612, and is less than the axial distance between the lower end surface of the sealing ring arranged on the outer wall of the upper end of the second sliding sleeve 62 and the upper end surface of the second pin 63, so as to ensure that the second hydraulic water detection switch 60 is completely closed and has.
In order to conveniently determine the installation position of the second sliding sleeve 62 during assembly, a second limit convex ring 6112 with a reduced diameter is formed on the inner wall of the second outer tube 61 and above the second pin 63, and the upper end face of the second sliding sleeve 62 abuts against the lower end face of the second limit convex ring 6112.
In addition, in order to avoid the first hydraulic control water detection switch 40 from opening early and causing pressure relief during the layer changing operation, and the second hydraulic control water detection switch 60 cannot be normally closed, the shearing pressure of the first pin 43 is larger than that of the second pin 63. Thus, when the second pin 63 is pressed, the second hydraulic control water finding switch 60 is firstly cut off, then the first pin 43 is cut off, and the first hydraulic control water finding switch 40 is opened, so that the layer changing success is ensured.
Further, in order to prolong the service life of the pipe string, as shown in fig. 1, an anti-corrosion nipple 80 is connected between the first packer 30 and the first hydraulic control water-exploration switch 40 and between the second packer 50 and the second hydraulic control water-exploration switch 60 respectively. Wherein, anticorrosive nipple joint 80 is the tubular structure that fills with anticorrosive material, and specific structure is prior art, and no longer repeated here.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (12)
1. A layered water exploration production integrated pipe column is characterized by comprising an oil well pump, a sieve pipe, a first packer, a first hydraulic control water exploration switch, a second packer, a second hydraulic control water exploration switch and a plug which are sequentially connected from top to bottom;
the first hydraulic control water finding switch comprises a first outer pipe, an annular groove is formed in the inner wall of the first outer pipe, a first sliding sleeve is sleeved in the first outer pipe, and a stepped sleeve with the outer diameter expanded is formed at the upper part of the first sliding sleeve upwards; the stepped sleeve is embedded in the annular groove in a sealing manner, a certain moving distance is reserved between the lower end face of the stepped sleeve and the lower side groove wall of the annular groove, and the lower outer wall of the first sliding sleeve is in sealing contact with the inner wall of the first outer pipe; a plurality of first liquid inlet holes are formed in the pipe wall of the first outer pipe and at intervals along the circumferential direction of the first outer pipe at positions corresponding to the step sleeves, and the first outer pipe and the first sliding sleeve are fixed through first pins; the second hydraulic control water finding switch is a normally open water finding switch.
2. The integrated tubular column for layered water exploration production of claim 1,
the moving distance is greater than the axial distance between the upper end face of the first sliding sleeve and the lower hole wall of the first liquid inlet hole.
3. The integrated tubular column for layered water exploration production of claim 1,
and the part of the first sliding sleeve, which is arranged on the pipe wall of the first outer pipe and corresponds to the lower part of the stepped sleeve, is provided with an exhaust hole, and the exhaust hole is communicated with an annular space formed by the moving distance.
4. The integrated tubular column for layered water exploration production of claim 3,
the first outer pipe comprises a first upper connecting pipe, a first connecting pipe and a first lower connecting pipe which are sequentially fixed from top to bottom, a stepped hole with an enlarged aperture is formed downwards on the inner wall of the lower part of the first upper connecting pipe, and the annular groove is formed between the stepped hole and the top surface of the first connecting pipe;
the first liquid inlet hole and the exhaust hole are formed in the hole wall of the stepped hole, the inner diameter of the first sliding sleeve is smaller than the inner diameter of the first upper connecting pipe and the inner diameter of the first connecting pipe, and the outer wall of the lower portion of the first sliding sleeve is in sealing contact with the inner wall of the upper end of the first connecting pipe.
5. The integrated tubular column for layered water exploration and production according to claim 4,
the inner wall of the lower end of the first upper connecting pipe is in threaded connection with the outer wall of the upper end of the first connecting pipe, and the outer wall of the lower end of the first connecting pipe is in threaded connection with the inner wall of the upper end of the first lower connecting pipe;
and a sealing ring is respectively sleeved between the outer wall of the stepped sleeve and the inner wall of the stepped hole above the first liquid inlet hole, between the inner wall of the upper end of the first connecting pipe and the outer wall of the lower end of the first sliding sleeve and between the outer wall of the lower part of the first connecting pipe and the inner wall of the upper end of the first lower connecting pipe.
6. The integrated tubular column for layered water exploration production of claim 1,
the second hydraulic control water detection switch comprises a second outer pipe, a second sliding sleeve is hermetically sleeved in the second outer pipe and is fixed with the second outer pipe through a second pin; a first limiting convex ring with a reduced diameter is formed on the inner wall of the second outer pipe and below the second sliding sleeve, and a certain sliding distance is reserved between the lower end face of the second sliding sleeve and the upper end face of the first limiting convex ring;
a plurality of second liquid inlet holes are formed in the pipe wall of the second outer pipe at intervals along the circumferential direction of the second outer pipe, and a plurality of third liquid inlet holes which can be correspondingly communicated with the second liquid inlet holes are formed in the pipe wall of the second sliding sleeve along the circumferential direction of the second sliding sleeve; and a sealing ball is also arranged in the second outer pipe and above the second sliding sleeve, and the diameter of the sealing ball is larger than the inner diameter of the second sliding sleeve.
7. The integrated tubular column for layered water exploration and production according to claim 6,
the second outer pipe comprises a second upper connecting pipe, a second connecting pipe and a second lower connecting pipe which are sequentially fixed from top to bottom, the second upper connecting pipe is fixed with a second sliding sleeve through a second pin, a second liquid inlet hole is formed in the second upper connecting pipe, and a first limiting convex ring is formed on the second lower connecting pipe.
8. The integrated tubular column for layered water exploration and production according to claim 7,
the inner wall of the lower end of the second upper connecting pipe downwards forms a first stepped pipe with an enlarged diameter, the inner wall of the lower end of the first stepped pipe is in threaded connection with the outer wall of the upper end of the second connecting pipe, and the second liquid inlet hole is formed in the pipe wall of the stepped pipe; the inner wall of the upper end of the second lower connecting pipe upwards forms a second stepped pipe with an enlarged diameter, and the outer wall of the lower end of the second connecting pipe is in threaded connection with the inner wall of the upper end of the second stepped pipe;
the lower end shaft shoulder of the second stepped pipe forms the first limiting convex ring; the inner diameter of the second upper connecting pipe is the same as that of the second connecting pipe, the inner diameter of the second lower connecting pipe is smaller than that of the second connecting pipe, and the outer wall of the lower end of the second sliding sleeve is in sealing contact with the inner wall of the upper end of the second connecting pipe.
9. The integrated tubular column for layered water exploration and production according to claim 8,
and a sealing ring is respectively sleeved between the outer wall of the upper end of the second sliding sleeve and the inner wall of the second upper connecting pipe, between the outer wall of the lower end of the second sliding sleeve and the inner wall of the upper end of the second connecting pipe, and between the outer wall of the lower part of the second connecting pipe and the inner wall of the upper end of the second lower connecting pipe.
10. The integrated tubular column for layered water exploration and production according to claim 9,
the sliding distance is greater than the axial distance between the upper hole wall of the third liquid inlet hole and the upper end face of the second connecting pipe and is smaller than the axial distance between the lower end face of a sealing ring arranged on the outer wall of the upper end of the second sliding sleeve and the upper side face of the second pin.
11. The integrated tubular column for layered water exploration and production according to claim 6,
the shear pressure of the first pin is greater than the shear pressure of the second pin.
12. The integrated tubular column for layered water exploration production of claim 1,
and an anti-corrosion short joint is respectively connected between the first packer and the first hydraulic control water finding switch and between the second packer and the second hydraulic control water finding switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020409132.0U CN212272146U (en) | 2020-03-26 | 2020-03-26 | Layered water exploration production integrated pipe column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020409132.0U CN212272146U (en) | 2020-03-26 | 2020-03-26 | Layered water exploration production integrated pipe column |
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| Publication Number | Publication Date |
|---|---|
| CN212272146U true CN212272146U (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020409132.0U Active CN212272146U (en) | 2020-03-26 | 2020-03-26 | Layered water exploration production integrated pipe column |
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| Country | Link |
|---|---|
| CN (1) | CN212272146U (en) |
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2020
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