CN215718655U - Selective control short circuit device for multi-stage perforation of oil and gas well - Google Patents
Selective control short circuit device for multi-stage perforation of oil and gas well Download PDFInfo
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- CN215718655U CN215718655U CN202121535812.8U CN202121535812U CN215718655U CN 215718655 U CN215718655 U CN 215718655U CN 202121535812 U CN202121535812 U CN 202121535812U CN 215718655 U CN215718655 U CN 215718655U
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Abstract
The utility model discloses a selective control short circuit device for multi-stage perforation of an oil-gas well, which mainly solves the problems of long length, heavy weight and complex assembly of the traditional selective control short circuit. The method comprises the following steps: the device comprises an outer shell, a selection control unit fixing body, a single-path explosion-proof module, a single-path cartridge clip connector, a double-path explosion-proof module and a double-path cartridge clip connector; inner holes at the left end and the right end of the outer shell are provided with three stages of inner steps and are matched with a selective control unit fixing body, and the selective control unit is positioned in the fixing body; the single-double path cartridge clip connectors are respectively installed in first-stage inner steps at the left end and the right end of the outer shell, the single-double path explosion-proof module is connected to the single-double path explosion-proof module along with the screwing of the gun barrel and the outer shell, and the single-double path explosion-proof module is respectively installed in the first-stage inner step at the left end of the outer shell and the second-stage inner step at the right end of the outer shell. The utility model realizes the purpose of connecting the upper and lower perforating guns and the protection circuit, is convenient for later maintenance, is simple in installation and operation, and can effectively improve the operation efficiency and reduce the operation cost in oil and gas exploitation.
Description
Technical Field
The utility model belongs to the technical field of oil and gas exploitation, and further relates to intelligent control over bridge plugs and perforation, in particular to a selective control short circuit device for multi-stage perforation of an oil and gas well, which can be used for underground perforation operation.
Background
In the oil and gas exploitation process, usually, after drilling, a casing is put in, cement is injected for well cementation, and after well cementation, a connecting passage between an oil and gas reservoir and the casing is opened through perforation and fracturing operations. The combination of the bridge plug and the perforation is the most widely used perforation completion mode for the development of unconventional oil and gas reservoirs, and the single well yield can be effectively improved.
The perforating string, typically carrying a plurality of perforating guns, is lowered into the cased hole to a location where one or more hydrocarbon reservoirs in the subterranean formation reside. The perforating gun is internally provided with the shaped perforating bullet, and the shaped perforating bullet can sequentially penetrate through a perforating gun barrel, a sleeve and a cement pouring layer after being detonated, so that hydrocarbon can flow into the sleeve. Once the gun reaches the specified location, the surface instrumentation issues an ignition signal, the kill-switch initiates the detonator within the gun, and in turn, the detonating cord, which detonates the shaped charge to pierce the barrel, casing, and cement layer, thereby allowing formation fluids to flow into the production string.
The assembly of a perforating gun requires a number of parts, typically including at least a barrel, a charge carrier, a wired detonator, a fuse, a shaped charge, a trigger switch, an intermediate sub, and a pressure-bearing line guide. At least two conducting wires need to be manually connected between the wired detonator and the selective firing switch, at least one conducting wire needs to be connected between the selective firing switch and the selective firing switch in the next-stage perforating gun assembly, at least one wire needs to be connected between the selective firing switch and the bullet rack, at least one conducting wire needs to be connected between the selective firing switch and the pressure-bearing wire passing device, the field manual wiring workload is large, rework is often caused by poor wiring, the length of an intermediate joint is long, the weight is large, and the field installation is troublesome and laborious; meanwhile, the prior related art also has the following problems: the wired detonator grounding wire is formed by connecting a detonator grounding wire to a bullet frame, and the phenomenon of poor grounding is easy to occur in the assembly process; the compatibility of the selective firing circuit is poor, and a plurality of detonating wires are reserved at the detonating end aiming at detonators with different specifications, so that wiring errors are easily caused; the selection circuit is installed in the perforating gun, and the circuit is easy to damage after the energy-gathered bullet is detonated.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a selective control short circuit device for multi-stage perforation of an oil-gas well, which combines a selective firing control circuit with an intermediate joint, realizes the connection of an upper perforating gun and a lower perforating gun, and the isolation of high-pressure impact generated when the perforating gun is fired and the static pressure of high-pressure liquid at the bottom of the well, thereby playing a role in protecting the selective firing control circuit, the firing perforating detonator and the firing device.
To achieve the above object, the present invention comprises: the device comprises an outer shell 1, a selection control unit 12, a selection control unit fixing body 6, a single-path explosion-proof module 4, a single-path cartridge clip connector 2, a double-path explosion-proof module 9 and a double-path cartridge clip connector 11;
the outer shell 1 is divided into two parts which are the same up and down, and the two parts are buckled with each other and connected in a threaded manner; inner holes at the left end and the right end of the outer shell 1 are respectively provided with three stages of inner steps;
the selective control unit 12 is fixed in the selective control unit fixing body 6; the selective control unit fixing body 6 comprises a single-core alloy elastic jack, a double-core alloy elastic jack, a selective control unit fixing groove, an alloy bracket, an insulating sleeve A5 and an insulating sleeve B8; the selective control unit fixing body 6 is provided with three stages of outer steps, and the outer step of the stage with the largest outer diameter of the selective control unit fixing body 6 is matched with the inner step of the deepest stage at the left side of the outer shell 1; wherein the first-stage outer step is the thinnest, an insulating sleeve A5 is embedded in the first-stage outer step, the outer layer of the first-stage outer step is an M18 external thread, and the second-stage outer step is a selective control unit fixing groove; the third-stage outer step is thickest, is embedded with an insulating sleeve B8 and is limited in the outer shell 1; the thin end of the fixed body 6 of the selection control unit is inserted into the outer shell 1 and locked by a fastening nut;
the single-path explosion-proof module 4 is a single-core high-temperature and high-pressure resistant sealed connector and is arranged in a second-stage inner step at the right end of the outer shell 1, and a single-core contact pin at the left end of the single-path explosion-proof module 4 is inserted into a single-core alloy elastic jack wrapped in the insulating sleeve A5;
the single-circuit cartridge clip connector 2 comprises a high-temperature wire, a single-core alloy elastic jack, an alloy shell A and an insulating sleeve C3, the single-circuit cartridge clip connector 2 is installed in a first-stage inner step at the right end of the outer shell 1 and is positioned at the left end of the cartridge frame, the high-temperature wire is connected with a middle core wire of the single-circuit cartridge clip connector 4 at the right end of the cartridge frame, and the single-core alloy elastic jack is sleeved on a right end contact pin of the single-circuit explosion-proof module 4;
the double-circuit explosion-proof module 9 is a double-core high-temperature and high-pressure resistant sealed connector and is arranged in a second-stage inner step at the left end of the outer shell 1, and a double-core contact pin at the right end of the double-circuit explosion-proof module 9 is inserted into a double-core alloy elastic jack wrapped in an insulating sleeve B8;
the double-circuit cartridge clip connector 11 comprises a high-temperature lead, an alloy shell B and an insulating sleeve D10, the double-circuit cartridge clip connector 11 is arranged in a first-stage inner step at the left end of the outer shell 1 and is positioned at the right end of the cartridge rack, wherein the high-temperature lead is connected with a middle core lead of the single-circuit cartridge clip connector 11 at the left end of the cartridge rack of the next-stage gun, and a lead-out wire of a thick core is connected with a detonating wire of a detonator; the double-core alloy elastic jack where the double-circuit cartridge clip connector 11 is located is sleeved on the left-end contact pin of the double-circuit explosion-proof module 9.
Compared with the prior art, the utility model has the following advantages:
firstly, the selective control short circuit provided by the utility model can be repeatedly used after being simply maintained, so that the oil and gas exploitation cost is reduced, and the operation time is saved;
secondly, the double-core pressure-bearing explosion-proof module is designed in the device, so that high-pressure impact generated when the perforating gun is detonated and static pressure of high-pressure liquid at the bottom of a well can be isolated, and a selective firing control circuit, a detonating perforating detonator and an igniter are protected from being damaged easily due to high pressure;
thirdly, the device adopts the gold-plated copper crown spring nests with different outer diameters as the connection mode of the double-core connector, thereby effectively avoiding a plurality of faults caused by wiring between rotating parts, facilitating field installation and use and reducing the dependence of construction links on manual operation proficiency;
fourthly, as the intermediate joint is optimally designed, compared with the traditional joint, an external thread sliding sleeve structure is not needed, and a selecting and sending circuit mounting bin, a pressure-bearing explosion-proof module fixing position and the like are integrated in the intermediate joint, the connecting length between two stages of guns is shortened, the weight of the joint is reduced, and the utility model has the characteristics of convenience for later maintenance and simplicity and convenience in construction operation.
Drawings
FIG. 1 is a schematic axial sectional view of the present invention;
fig. 2 is an overall outline view of the present invention.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the utility model provides a specific structure of a selective control/tail control short circuit device for multi-stage perforation of an oil-gas well, and the device specifically comprises: the device comprises an outer shell 1, a selection control unit 12, a selection control unit fixing body 6, a single-path explosion-proof module 4, a single-path cartridge clip connector 2, a double-path explosion-proof module 9 and a double-path cartridge clip connector 11;
the outer shell 1 is divided into two parts which are the same up and down, and the two parts are buckled with each other and connected in a threaded mode; inner holes at the left end and the right end of the outer shell 1 are respectively provided with three stages of inner steps;
the selection control unit 12 is fixed in the selection control unit fixing body 6; the selective control unit fixing body 6 comprises a single-core alloy elastic jack, a double-core alloy elastic jack, a selective control unit fixing groove, an alloy bracket, an insulating sleeve A5 and an insulating sleeve B8; the selective control unit fixing body 6 is provided with three stages of outer steps, and the outer step of the stage with the largest outer diameter of the selective control unit fixing body 6 is matched with the inner step of the deepest stage at the left side of the outer shell 1; wherein the first-stage outer step is the thinnest, an insulating sleeve A5 is embedded in the first-stage outer step, the outer layer of the first-stage outer step is an M18 external thread, and the second-stage outer step is a selective control unit fixing groove; the third-stage outer step is thickest, is embedded with an insulating sleeve B8 and is limited in the outer shell 1; the thin end of the fixing body 6 of the selection control unit is inserted into the outer shell 1 and locked by using a fastening nut. The selection control unit 12 is specifically an intelligent selection control circuit for the combined operation of a bridge plug and a perforation, is connected with a selection control device through a logging cable, and comprises: the device comprises a microprocessor demodulation module, a power management module, a modulation module, an AD sampling circuit and a detonator priming circuit. Of course, other intelligent selective sending control circuits with selective control function are also possible.
The one-way explosion-proof module 4 is a single-core high-temperature and high-pressure resistant sealed connector and is arranged in a second-level inner step at the right end of the outer shell 1, and a single-core contact pin at the left end of the one-way explosion-proof module 4 is inserted into a single-core alloy elastic jack wrapped in the insulating sleeve A5; the one-way cartridge clip connector 2 comprises a high-temperature wire, a single-core alloy elastic jack, an alloy shell A and an insulating sleeve C3, the one-way cartridge clip connector 2 is installed in a first-level inner step of the right end of the outer shell 1 and is located at the left end of the cartridge rack, the high-temperature wire is connected with a middle core wire of the one-way cartridge clip connector 4 at the right end of the cartridge rack, the single-core alloy elastic jack is sleeved on a right end contact pin of the one-way explosion-proof module 4, and the one-way cartridge clip connector is specifically realized in the screwing process of threads.
The double-circuit explosion-proof module 9 is a double-core high-temperature-resistant high-pressure-sealed connector and is arranged in a second-stage inner step at the left end of the outer shell 1, and a double-core contact pin at the right end of the double-circuit explosion-proof module 9 is inserted into a double-core alloy elastic jack wrapped in an insulating sleeve B8;
the double-circuit cartridge clip connector 11 comprises a high-temperature lead, an alloy shell B and an insulating sleeve D10, the double-circuit cartridge clip connector 11 is arranged in a first-stage inner step at the left end of the outer shell 1 and is positioned at the right end of the cartridge frame, wherein the high-temperature lead is connected with a middle core lead of the single-circuit cartridge clip connector 11 at the left end of the cartridge frame of the next-stage gun, and a lead-out wire of a thick core is connected with a detonating wire of a detonator; the double-core alloy elastic jack where the double-circuit cartridge clip connector 11 is located is sleeved on a left-end contact pin of the double-circuit explosion-proof module 9, and is specifically realized in the screwing process of threads.
The single-path explosion-proof module 4 and the double-path explosion-proof module 9 are processed by a sintering process.
The single-path cartridge clip connector 2 and the double-path cartridge clip connector 11 are respectively installed in first-stage inner steps at the left end and the right end of the outer shell 1, are screwed and installed and fixed on the cartridge frame through threads, and are connected to the single-path explosion-proof module and the double-path explosion-proof module along with the screwing of the gun tube and the outer shell.
The device leads the input end of a selective firing control circuit and the detonation output end of a detonator out of the left end of an intermediate joint, the input end of the selective firing control circuit is connected to a thin core of a double-core jack, the detonation output end of the detonator is connected to a thick core of the double-core jack, the cascade output end of the selective firing control circuit is led out of the right end of the intermediate joint, the cascade output end of the selective firing control circuit is connected to a core of a single-core jack, the thin core of the double-core jack and the core of the single-core jack both adopt a conductive ring spring jack of 3mm, and the thick core of the double-core jack adopts a crown spring jack of 10 mm. The left end of the intermediate joint realizes the leading-out and high-voltage isolation of the line by using a double-core pressure-bearing wire passing module, and the left end of the intermediate joint realizes the leading-out and high-voltage isolation of the line by using a single-core pressure-bearing wire passing module; the circuit led out from the left end is connected with a double-core bullet rack connector, and the output end of the double-core bullet rack connector is connected with a lead in a detonator bullet rack; the output end of the single-core bullet rack connector is connected with a lead in a bullet rack of a next-level gun. The functions of connecting an upper perforating gun and a lower perforating gun, isolating high-pressure impact generated when the perforating gun is detonated and static pressure of high-pressure liquid at the bottom of a well, protecting and protecting a selective firing control circuit, a detonating perforating detonator and a primer are realized. The device is convenient for later maintenance, installation easy operation, and the cost is lower, can effectively promote the operating efficiency in the practical application of oil gas exploitation, reduces the operating cost.
The utility model has not been described in detail in part of the common general knowledge of those skilled in the art.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (6)
1. A releasable short circuit device for perforation of an oil and gas well, comprising: the device comprises an outer shell (1), a selection control unit (12), a selection control unit fixing body (6), a single-path explosion-proof module (4), a single-path cartridge clip connector (2), a double-path explosion-proof module (9) and a double-path cartridge clip connector (11);
the outer shell (1) is divided into two parts which are the same up and down, and the two parts are buckled with each other and connected in a threaded manner; inner holes at the left end and the right end of the outer shell (1) are respectively provided with three stages of inner steps;
the selective control unit (12) is fixed in the selective control unit fixing body (6); the selective control unit fixing body (6) comprises a single-core alloy elastic jack, a double-core alloy elastic jack, a selective control unit fixing groove, an alloy support, an insulating sleeve A (5) and an insulating sleeve B (8); the selective control unit fixing body (6) is provided with three stages of outer steps, and the outer step with the largest outer diameter of the selective control unit fixing body (6) is matched with the inner step with the deepest stage on the left side of the outer shell (1); wherein the first-stage outer step is the thinnest, an insulating sleeve A (5) is embedded in the first-stage outer step, the outer layer of the first-stage outer step is an external thread of M18, and the second-stage outer step is a selective control unit fixing groove; the third-stage outer step is thickest, is embedded with an insulating sleeve B (8) and is limited in the outer shell (1); the thin end of the fixed body (6) of the selection control unit is inserted into the outer shell (1) and locked by a fastening nut;
the single-path explosion-proof module (4) is a single-core high-temperature and high-pressure resistant sealed connector and is arranged in a second-stage inner step at the right end of the outer shell (1), and a single-core contact pin at the left end of the single-path explosion-proof module (4) is inserted into a single-core alloy elastic jack wrapped in the insulating sleeve A (5);
the single-circuit cartridge clip connector (2) comprises a high-temperature wire, a single-core alloy elastic jack, an alloy shell A and an insulating sleeve C (3), the single-circuit cartridge clip connector (2) is installed in a first-stage inner step at the right end of the outer shell (1) and is located at the left end of the cartridge frame, the high-temperature wire is connected with a middle core wire of the single-circuit cartridge clip connector (4) at the right end of the cartridge frame, and the single-core alloy elastic jack is sleeved on a right-end contact pin of the single-circuit explosion-proof module (4);
the double-circuit explosion-proof module (9) is a double-core high-temperature-resistant high-pressure-sealed connector and is arranged in a second-stage inner step at the left end of the outer shell (1), and a double-core contact pin at the right end of the double-circuit explosion-proof module (9) is inserted into a double-core alloy elastic jack wrapped in the insulating sleeve B (8);
the double-circuit cartridge clip connector (11) comprises a high-temperature lead, an alloy shell B and an insulating sleeve D (10), the double-circuit cartridge clip connector (11) is arranged in a first-stage inner step at the left end of the outer shell (1) and is positioned at the right end of the cartridge frame, the high-temperature lead is connected with a middle core lead of the single-circuit cartridge clip connector (11) at the left end of the cartridge frame of the next-stage gun, and a lead-out wire of a thick core is connected with a detonating wire of a detonator; the double-core alloy elastic jack where the double-circuit cartridge clip connector (11) is located is sleeved on the left-end contact pin of the double-circuit explosion-proof module (9).
2. The apparatus of claim 1, wherein: the single-path explosion-proof module (4) and the double-path explosion-proof module (9) are processed by a sintering process.
3. The apparatus of claim 1, wherein: the selective control unit (12) is an intelligent selective-sending control circuit used for the combined action of a bridge plug and a perforation, is connected with a selective-sending control device through a logging cable, and comprises: the device comprises a microprocessor demodulation module, a power management module, a modulation module, an AD sampling circuit and a detonator priming circuit.
4. The apparatus of claim 1, wherein: the single-path cartridge clip connector (2) and the double-path cartridge clip connector (11) are respectively installed in the first-stage inner steps at the left end and the right end of the outer shell (1), are screwed and installed and fixed on the cartridge frame through threads, and are connected to the single-path explosion-proof module and the double-path explosion-proof module along with the screwing of the gun barrel and the outer shell.
5. The apparatus of claim 1, wherein: the single-core alloy elastic jack is sleeved on a right end contact pin of the single-path explosion-proof module (4) and is realized in the screwing process of the thread.
6. The apparatus of claim 1, wherein: the double-core alloy elastic jack is sleeved on a left-end contact pin of the double-circuit explosion-proof module (9) and is realized in the screwing process of threads.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121535812.8U CN215718655U (en) | 2021-07-07 | 2021-07-07 | Selective control short circuit device for multi-stage perforation of oil and gas well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121535812.8U CN215718655U (en) | 2021-07-07 | 2021-07-07 | Selective control short circuit device for multi-stage perforation of oil and gas well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753809A (en) * | 2022-06-16 | 2022-07-15 | 大庆华翰邦石油科技有限公司 | Shale reservoir high-pressure self-orienting clustering perforator |
-
2021
- 2021-07-07 CN CN202121535812.8U patent/CN215718655U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114753809A (en) * | 2022-06-16 | 2022-07-15 | 大庆华翰邦石油科技有限公司 | Shale reservoir high-pressure self-orienting clustering perforator |
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