CN210918979U - Pressure hole closing device - Google Patents
Pressure hole closing device Download PDFInfo
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- CN210918979U CN210918979U CN201921713656.2U CN201921713656U CN210918979U CN 210918979 U CN210918979 U CN 210918979U CN 201921713656 U CN201921713656 U CN 201921713656U CN 210918979 U CN210918979 U CN 210918979U
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Abstract
The utility model discloses a pressure hole closing device, which comprises a fixed sleeve, a sliding sleeve, a damping washer, a shearing sleeve, a shearing pin and a clamping ring which are arranged in an integral cylindrical pipe body, wherein the fixed sleeve is sleeved and fixed at the top end of the sliding sleeve and is sealed with the cylindrical pipe body through the sealing ring; the shearing sleeve is sleeved outside the sliding sleeve, and the bottom of the shearing sleeve is press-fitted on the upper end face of the annular step of the cylindrical pipe body; the shearing sleeve is fixed on the sliding sleeve through a plurality of shearing pins and is provided with a damping washer sleeve; a clamping ring in a tightened state is further arranged on the outer wall of the lower part of the sliding sleeve, and a plurality of circulation holes are formed in the side wall of the cylindrical pipe body below the sliding sleeve; according to the pressure hole closing device, the shearing pin is cut off by using detonation impact or well fluid pressure generated at the moment of detonation of the upper-layer perforator, so that the fixed sleeve and the sliding sleeve move downwards under the action of the detonation impact or the well fluid pressure to seal the flow through hole, the purpose of effectively closing a fluid production channel of a lower-layer perforation test is achieved, and the efficiency and the accuracy of oil testing are effectively improved.
Description
Technical Field
The utility model relates to an oil gas field borehole operation technical field, in particular to pressure hole closing device.
Background
The conventional perforation-test combined operation mode is that a perforator and a tester are combined on the same tubular column to finish perforation and stratum test operation at one time, for an oil-gas well with a plurality of layers needing perforation test, a plurality of tubular columns are adopted to carry out perforation oil test operation in a layered mode, the tubular columns are required to be repeatedly taken down for perforation test combined operation, the construction period is long, the cost is high, and stratum pollution is serious; and a one-trip pipe column multi-layer perforation and multi-layer combined oil testing can be adopted, and due to the difference of physical properties of each layer and interference among productivity parameters, the method has certain deviation on the recording of the information of the target stratum.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a when the detonating of upper perforator, close the liquid production passageway of lower floor's perforation test, realize the pressure hole closing device of layering timesharing perforation test joint action.
Therefore, the utility model discloses technical scheme as follows:
a pressure hole closing device comprises a fixed sleeve, a sliding sleeve, a damping washer, a shearing sleeve, a shearing pin and a clamping ring which are arranged in a cylindrical pipe body, wherein the fixed sleeve is arranged at the upper part of the cylindrical pipe body and is of a cylinder structure with an annular boss at the top end, and the outer wall of the annular boss is in contact with the inner wall of the cylindrical pipe body; the sliding sleeve is of a cylindrical structure, the outer wall of the top end of the sliding sleeve is sunken towards the inner side and is provided with a second annular step, so that the top end of the sliding sleeve is inserted and fixed in a central hole channel of the fixed sleeve, the inner wall of the cylindrical pipe body is provided with a first annular step, the bottom end of the fixed sleeve is pressed and arranged on the upper end surface of the second annular step, and the outer wall of the lower part of the sliding sleeve is in contact with the inner side wall surface of the first annular step; the shearing sleeve is sleeved outside the sliding sleeve, and the bottom of the shearing sleeve is press-fitted on the upper end face of the first annular step; the shearing sleeve is fixed on the sliding sleeve through a plurality of shearing pins arranged along the circumferential direction of the shearing sleeve; the shock absorption gasket is sleeved outside the sliding sleeve and arranged above the shearing sleeve; an annular groove is formed in the outer wall of the lower part of the sliding sleeve, so that the clamping ring is arranged in the annular groove in a tightened state; and a plurality of circulation holes are formed in the side wall of the cylindrical pipe body below the sliding sleeve along the circumferential direction.
Furthermore, the fixed sleeve is fixed on the sliding sleeve by uniformly arranging a plurality of first screws along the circumferential direction of the bottom end of the fixed sleeve.
Furthermore, a plurality of through holes are formed in the shearing sleeve along the circumferential direction, so that the shearing sleeve can be fixed on the sliding sleeve through any number of shearing pins locally along the circumferential direction, and the shearing pressure can be adjusted.
Furthermore, at least one first O-shaped sealing ring is arranged between the inner wall of the cylindrical pipe body and the outer wall of the fixed sleeve, so that sealing is formed between the cylindrical pipe body and the fixed sleeve.
Furthermore, at least one second O-shaped sealing ring is arranged between the outer wall of the sliding sleeve and the inner wall of the fixed sleeve, so that sealing is formed between the sliding sleeve and the fixed sleeve.
Furthermore, at least one third O-shaped sealing ring is arranged between the outer wall of the sliding sleeve positioned above the clamping ring and the inner side wall surface of the first annular step of the cylindrical pipe body, and at least one bidirectional piston seal is arranged between the outer wall of the sliding sleeve positioned below the clamping ring and the inner side wall surface of the first annular step of the cylindrical pipe body, so that sealing is formed between the sliding sleeve and the cylindrical pipe body.
Furthermore, an axial blind hole is formed in the bottom surface of the sliding sleeve in the axial direction, so that the purpose of reducing the weight of the sliding sleeve is achieved.
Further, the cylindrical pipe body is composed of an upper joint and a lower joint; the bottom end of the upper joint is sleeved at the top end of the lower joint and is fixed in a tightened state through threaded connection, so that the end part of the top end of the lower joint forms an annular step arranged on the inner wall of the upper joint; the circulation hole is formed in the lower joint.
Furthermore, an annular limiting step is arranged on the inner wall of the upper joint of the fixed sleeve.
Furthermore, a T-shaped thread buckle is arranged on the inner wall of the top end of the upper joint, and a connecting external thread is arranged on the outer wall of the bottom end of the lower joint.
Furthermore, at least one fourth O-shaped sealing ring is arranged between the upper joint and the lower joint, so that the upper joint and the lower joint are in threaded sealing connection.
Furthermore, the upper joint and the lower joint are fixedly integrated through a plurality of second screws uniformly distributed along the circumferential direction of the upper joint.
Further, the number of the first screws is preferably 3-5, the number of the second screws is preferably 3-5, and the first screws and the second screws are preferably M5 screws, so that the pressure bearing capacity of the first screws and the second screws is far greater than the integral pressure bearing capacity of the shear pin.
Further, the number of the circulation holes is preferably 4-6, the circulation holes are used as liquid production channels for perforation tests, and the number and the aperture of the circulation holes are suitable for the liquid flow rate required by the liquid production channels.
Furthermore, a plurality of screw holes used for being connected with the perforating gun are formed in the end face of the top end of the fixed sleeve along the axial direction, pressure is transferred to the structure formed by integrally forming the fixed sleeve and the sliding sleeve after the perforating gun is detonated, and therefore the shearing pin is cut off.
Compared with the prior art, the pressure hole closing device is simple in structure and reasonable in design, when the pressure hole closing device is used for oil pipe transmission perforation, the shearing pin can be cut off by utilizing detonation impact or well fluid pressure generated in the detonation moment of the upper layer perforator or well fluid pressure, the fixed sleeve and the sliding sleeve can move downwards under the action of the detonation impact or the well fluid pressure, the circulation hole is sealed, the purpose of effectively closing a fluid production channel of the lower layer perforation test is achieved, the defect of the existing perforation-test combined operation is overcome, and the efficiency and the accuracy of oil testing are improved.
Drawings
Fig. 1 is a schematic structural diagram of the pressure hole closing device of the present invention.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
As shown in fig. 1, the pressure hole-closing device comprises an upper joint 1, a fixed sleeve 4, a sliding sleeve 5, a shock-absorbing washer 6, a shearing sleeve 7, a shearing pin 8, a clamping ring 10 and a lower joint 14, wherein,
the bottom end of the upper joint 1 is sleeved at the top end of the lower joint 14 and fixedly connected through threads to form a cylindrical pipe body, and the threaded connection mode enables the end part of the top end of the lower joint 14 to form a first annular step arranged on the inner wall of the upper joint 1; the upper joint 1 and the lower joint 14 are further reinforced and fixed into a whole by second screws 12 uniformly distributed along the circumferential direction of the upper joint 1; meanwhile, in order to ensure the connection tightness between the upper joint and the lower joint, two fourth O-shaped sealing rings 11 are arranged on the outer wall of the lower joint 14 below the connecting external thread, so that the upper joint 1 and the lower joint 14 are in threaded sealing connection;
in addition, in order to facilitate the connection of the pressure hole closing device with devices above and below the pressure hole closing device, a T-shaped thread buckle used for being connected with a perforating gun is arranged on the inner wall of the top end of the upper joint 1, and an external thread connected with an oil pipe is arranged on the outer wall of the bottom end of the lower joint 14.
The fixed sleeve 4, the sliding sleeve 5, the damping washer 6, the shearing sleeve 7, the shearing pin 8 and the clamping ring 10 are arranged in a cylindrical pipe inner cavity formed by the upper joint 1 and the lower joint 14; in particular, the amount of the solvent to be used,
the fixed sleeve 4 is arranged at the upper part of the upper joint 1 and is of a cylinder structure with an annular boss at the top end, and the outer wall of the annular boss is contacted with the inner wall of the cylindrical pipe body; in addition, a double-channel first O-shaped sealing ring 2 is arranged on the outer wall of the annular boss of the fixed sleeve 4, so that sealing is formed between the upper joint 1 and the fixed sleeve 4; correspondingly, an annular limiting step 101 is arranged on the inner wall of the upper joint 1 above the fixed sleeve 4 and is used as a limiting step for limiting the upward movement of the fixed sleeve 4;
the sliding sleeve 5 is of a cylindrical structure, the outer wall of the top end of the sliding sleeve is sunken inwards and is provided with a second annular step 501, so that the top end of the sliding sleeve 5 is inserted into a central hole channel of the fixed sleeve 4, the bottom end of the fixed sleeve 4 is pressed on the upper end surface of the second annular step, and the outer wall of the lower part of the sliding sleeve 5 is in contact with the inner side wall surface of the first annular step; four first screws 15 are uniformly distributed and arranged on the side wall of the lower part of the fixed sleeve 4 along the circumferential direction of the bottom end of the fixed sleeve and are fixed on the sliding sleeve 5; in addition, a double-channel second O-shaped sealing ring 3 is arranged on the outer wall of the top end of the sliding sleeve 5, so that sealing is formed between the sliding sleeve 5 and the fixed sleeve 4;
as another preferable technical scheme of the embodiment, an axial blind hole 502 is formed in the bottom surface of the sliding sleeve 5 along the axial direction, so that the weight reduction of the self weight is realized;
the shearing sleeve 7 is sleeved on the outer side of the sliding sleeve 5, and the bottom of the shearing sleeve is press-fitted on the upper end face of the first annular step; the shearing sleeve 7 is uniformly provided with 18 radial through holes along the circumferential direction, so that the shearing sleeve is fixed on the sliding sleeve 5 through any number of shearing pins 8 uniformly distributed along the circumferential direction, the bearing capacity of the shearing pins 8 is adapted to the pressure transmitted when the perforating gun is detonated, the shearing pins 8 are simultaneously sheared when the bearing capacity reaches the pressure transmission of the perforating gun, and correspondingly, the bearing capacity of the first screw 15 and the second screw 12 is far higher than the shearing pressure of the shearing pins 8, so that the integral stability of the device is ensured; the combined structure of the shearing pin and the shearing sleeve can effectively prevent the sliding sleeve from downwards moving due to vibration of a pipe column or inertial drilling;
the damping washer 6 is sleeved outside the sliding sleeve 5, and the bottom of the damping washer is press-fitted on the upper end face of the shearing sleeve 7;
four circulation holes 16 are arranged on the side wall of the lower joint 14 positioned below the sliding sleeve 5 along the circumferential direction, and the aperture of each circulation hole 16 is 25mm, so that the four circulation holes 16 jointly meet the flow requirement of a liquid production channel.
An annular groove is formed in the outer wall of the lower part of the sliding sleeve 5, so that the clamping ring 10 is arranged in the annular groove in a tightened state; in addition, a double-channel third O-shaped sealing ring 9 is arranged on the outer wall of the sliding sleeve 5 above the clamping ring 10, so that the double-channel third O-shaped sealing ring 9 is arranged between the outer wall of the sliding sleeve 5 below the clamping ring 10 and the inner side wall surface of the first annular step of the cylindrical pipe body, and a double-channel bidirectional piston sealing ring 13 is arranged between the outer wall of the sliding sleeve 5 below the clamping ring 10 and the inner side wall surface of the first annular step of the cylindrical pipe body, so that sealing is formed between the sliding sleeve 5 and the cylindrical;
because the effect of rand 10 and fixed cover 4 is all to make sliding sleeve 5 fix on the position that can effectively shutoff opening, consequently, the axial distance of the up end of the lower terminal surface of the annular boss of fixed cover 4 to damping washer 6 suits with the axial distance of rand 10 bottom end face to opening hole wall below the opening.
During construction, N-stage perforating and pressure hole-closing tubular columns with perforating and hole-closing functions are connected firstly, specifically, each stage of perforating and pressure hole-closing tubular column comprises a first detonating device, a first perforating gun, a first pressure hole-closing device, a first oil pipe, a first RTTS packer, a first sieve pipe, a first shock absorber and a second oil pipe which are connected in sequence, and the multistage perforating and pressure hole-closing tubular columns are connected through a plurality of oil pipes, so that the perforating guns respectively correspond to stratum perforating positions with corresponding depths after being put into the well, and the perforating guns can be put into the well after being connected with corresponding pipe fittings at the heads and the tails of the N-stage perforating and pressure hole-closing tubular columns.
The working principle of the pressure hole closing device in each stage of perforation and pressure hole closing tubular column is as follows: the shearing pin 8 is sheared by using detonation impact or well fluid pressure generated at the initiation moment of the upper-layer perforator, so that the fixed sleeve 4 and the sliding sleeve 5 move downwards to the position of the damping washer 6 under the action of the detonation impact or the well fluid pressure, the damping washer 6 plays a damping role, meanwhile, the clamping ring 10 moves downwards along with the sliding sleeve 5 to the position of the circulation hole 16 to be opened and clamped at the lower side hole wall of the circulation hole 16, and the fixed sleeve 4 press-fitted on the damping washer 6 and the clamping ring 10 clamped at the position of the circulation hole 16 both play a limiting role on the sliding sleeve 5; meanwhile, the double-channel third O-shaped sealing ring 9 and the double-channel bidirectional piston seal 13 move to be just positioned at two sides of the circulation hole 16 to form sealing, and the purpose of closing a liquid production channel of a lower-layer perforation test, namely the circulation hole 16, is effectively achieved.
In conclusion, the pressure hole closing devices are arranged below the perforating guns of each stage, so that a plurality of perforating gun oil pipes can be conveyed into a well once, each perforating gun is ignited in a time-sharing mode for perforating, a plurality of layers are tested in a layering mode, time-sharing perforating and independent testing of each target layer are achieved, multi-layer layering testing is achieved, the defect of perforation-testing combined operation is overcome, and the efficiency and the accuracy of oil testing are improved.
Claims (10)
1. The pressure hole closing device is characterized by comprising a fixed sleeve (4), a sliding sleeve (5), a damping washer (6), a shearing sleeve (7), a shearing pin (8) and a clamping ring (10) which are arranged in a cylindrical pipe body, wherein the fixed sleeve (4) is arranged at the upper part of the cylindrical pipe body and is of a cylindrical structure with an annular boss at the top end, and the outer wall of the annular boss is in contact with the inner wall of the cylindrical pipe body; the sliding sleeve (5) is of a cylindrical structure, the outer wall of the top end of the sliding sleeve (5) is sunken inwards and is provided with a second annular step (501), the top end of the sliding sleeve (5) is inserted and fixed in a central hole channel of the fixed sleeve (4), the inner wall of the cylindrical pipe body is provided with a first annular step, the bottom end of the fixed sleeve (4) is pressed on the upper end face of the second annular step, and the outer wall of the lower part of the sliding sleeve (5) is in contact with the inner side wall face of the first annular step; the shearing sleeve (7) is sleeved on the outer side of the sliding sleeve (5), and the bottom of the shearing sleeve is press-fitted on the upper end face of the first annular step; the shearing sleeve (7) is fixed on the sliding sleeve (5) through a plurality of shearing pins (8) arranged along the circumferential direction of the shearing sleeve; the damping washer (6) is sleeved on the outer side of the sliding sleeve (5) and is arranged above the shearing sleeve (7); an annular groove is formed in the outer wall of the lower part of the sliding sleeve (5), so that the clamping ring (10) is arranged in the annular groove in a tightened state; a plurality of circulation holes (16) are arranged on the side wall of the cylindrical pipe body below the sliding sleeve (5) along the circumferential direction.
2. Pressure tapping device according to claim 1, wherein at least one first O-ring (2) is arranged between the inner wall of said cylindrical tube and the outer wall of said retaining sleeve (4) to provide a seal between said cylindrical tube and said retaining sleeve (4).
3. Pressure tapping device according to claim 2, wherein at least one second O-ring (3) is arranged between the outer wall of said sliding sleeve (5) and the inner wall of said retaining sleeve (4) to provide a seal between said sliding sleeve (5) and said retaining sleeve (4).
4. A pressure shut-off device according to claim 1, characterized in that at least one third O-ring (9) is provided between the outer wall of the sliding sleeve (5) above the collar (10) and the inner side wall surface of the first annular step of the cylindrical tubular body, and at least one bi-directional piston seal (13) is provided between the outer wall of the sliding sleeve (5) below the collar (10) and the inner side wall surface of the first annular step of the cylindrical tubular body, so that a seal is formed between the sliding sleeve (5) and the cylindrical tubular body.
5. The pressure hole-closing device according to claim 1, characterized in that an axial blind hole (502) is provided from the bottom surface of the sliding sleeve (5) along the axial direction.
6. Pressure shut-off device according to claim 1, characterized in that said cylindrical tubular body is constituted by an upper joint (1) and a lower joint (14); the bottom end of the upper joint (1) is sleeved at the top end of the lower joint (14) and is fixedly connected through threads, so that an annular step arranged on the inner wall of the upper joint (1) is formed at the top end of the lower joint (14); the flow hole (16) is arranged on the lower joint (14).
7. A pressure tapping device as claimed in claim 6, wherein an annular limiting step (101) is provided on the inner wall of the upper fitting (1) of said retaining sleeve (4).
8. A pressure hole-closing device according to claim 6, characterized in that the top inner wall of the upper joint (1) is provided with a T-shaped threaded buckle, and the bottom outer wall of the lower joint (14) is provided with a connecting external thread.
9. Pressure shut-off device according to claim 6, characterised in that at least one fourth O-ring (11) is arranged between the upper fitting (1) and the lower fitting (14) to form a screw-tight connection between the upper fitting (1) and the lower fitting (14).
10. The pressure hole-closing device according to claim 9, characterized in that the upper joint (1) and the lower joint (14) are further fixed and integrated by a plurality of second screws uniformly distributed along the circumferential direction of the upper joint (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921713656.2U CN210918979U (en) | 2019-10-14 | 2019-10-14 | Pressure hole closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921713656.2U CN210918979U (en) | 2019-10-14 | 2019-10-14 | Pressure hole closing device |
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| Publication Number | Publication Date |
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| CN210918979U true CN210918979U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921713656.2U Active CN210918979U (en) | 2019-10-14 | 2019-10-14 | Pressure hole closing device |
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| CN (1) | CN210918979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145116A (en) * | 2020-10-19 | 2020-12-29 | 中石化石油工程技术服务有限公司 | Oil and gas well packing device and using method thereof |
-
2019
- 2019-10-14 CN CN201921713656.2U patent/CN210918979U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145116A (en) * | 2020-10-19 | 2020-12-29 | 中石化石油工程技术服务有限公司 | Oil and gas well packing device and using method thereof |
| CN112145116B (en) * | 2020-10-19 | 2024-06-04 | 中石化石油工程技术服务有限公司 | Oil-gas well packing device and use method thereof |
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