CN213478308U - Novel perforating exploder - Google Patents
Novel perforating exploder Download PDFInfo
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- CN213478308U CN213478308U CN202022440129.8U CN202022440129U CN213478308U CN 213478308 U CN213478308 U CN 213478308U CN 202022440129 U CN202022440129 U CN 202022440129U CN 213478308 U CN213478308 U CN 213478308U
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Abstract
The utility model relates to a novel perforation detonator relates to oil gas well perforation field. The novel perforation initiator comprises an upper joint, a sealing ring, a ball seat, a production hole, a pin, a lower joint, a locking block, a connecting sleeve, a circulating hole, a piston, a sealing ring, a pin, a firing pin, a charge cake, a pressing cap and a piston sleeve. The utility model discloses a purpose changes the current situation that the detonator pin goes into the well just receives liquid column pressure, the piston that will have the firing pin carries out mechanical locking, this locking need be thrown the ball and suppress and just can remove, any pressure arouses before the locking is removed and all can not be used in on the pin, can circulate killing well or replace liquid before the perforation, there is the production passageway to be used for oil gas production after the perforation, avoid solid phase impurity to deposit and block up the biography pressure passageway and lead to unable the detonation of suppressing on piston upper portion, the success rate of perforation has been improved.
Description
Technical Field
The utility model relates to an oil gas well perforation field, concretely relates to novel perforation exploder.
Background
With the continuous deepening of oil exploration and development, deeper and deeper oil and gas reservoirs are discovered, but the oil and gas reservoirs generally have the characteristics of high temperature and high pressure. For the perforation operation of a high-temperature and high-pressure well, namely the sealing performance of a perforating gun entering the well and the safety of initiating explosive devices are ensured, the perforating gun can be ensured to smoothly fall to a preset depth, the pressure-bearing strength of the perforating gun meets the requirement when the selected operating pressure and negative pressure value are detonated, various performances of the perforating gun are concerned under the safe high-pressure situation, engineering blasting in the field of oil and gas well perforation is concerned, and the safety of operating personnel is more and more concerned.
In the process of petroleum exploration and development, a wellhead needs to be pressed to a higher value when a general negative pressure perforating well is detonated, and certain well control risks exist: the problem is particularly prominent at a machine pumping well mouth with a well mouth of 35MPa, taking a well with the well depth of about 4650m as an example, the setting depth of an initiator is 4600m, the specific gravity of a completion fluid is 1.14 oilfield water when a perforating gun is set, a negative pressure perforating fluid (induced liquid) is thin oil with the specific gravity of 0.86, 21 pins (the pin shear value is 69.09MPa and a single pin is 3.29MPa) are required to be installed for setting the safe additional value of the pins of 15MPa for safe design of setting, and the well mouth is required to be pressurized by 30.28MPa (more than 80 percent of the rated working pressure of the well mouth) when the initiation is carried out after the thin oil is replaced.
Because the perforating screen pipe and the detonator are closed sections, once solid impurities are deposited on the upper part of the piston, the deposits cannot be processed, and pressure transmission is not smooth or even blocked, so that perforating failure is caused; the problem that the perforated detonator used in the old well with the integrity defect of the casing is more prominent, the pipe column above the detonator is completely closed, the liquid needs to be poured while the pipe column is lowered, the liquid in the pipe column is in a static state all the time, and the precipitation possibility is higher.
Chinese patent application 201910046455.X discloses a percussion initiator for perforation of oil and gas wells, which comprises a non-initiating explosive percussion cap, a cap seat, a non-initiating explosive detonator and a body. The invention is used in the oil pipe transmission perforation initiation device of the oil gas well, on one hand, the safety of perforation construction operation is improved from the intrinsic safety, on the other hand, the occurrence of gun blasting construction accidents caused by liquid inlet of a perforating gun can be effectively avoided, but the application does not pay attention to the problem of solid-phase impurity precipitation.
Chinese patent application 201320586730.5 discloses an impact detonator for oil well perforation, which comprises an detonator casing, a firing pin sleeve, an impact detonator, a pressure-bearing body, a pressure-bearing spring, a support sleeve, a explosion-proof plate, a support seat, a rotating shaft and the like, wherein the firing pin is installed in the firing pin sleeve and is fixedly connected with the firing pin sleeve through a pin, the firing pin sleeve is installed on the pressure-bearing body, a seal ring is installed on the pressure-bearing body and is arranged in the detonator casing, the support sleeve is installed in an inner hole of the pressure-bearing body, the impact detonator is installed on the support seat, the support seat is installed in the detonator casing, and the pressure-bearing spring is installed between the pressure-bearing body and the support seat.
Therefore, a novel perforation initiator which can improve the success rate of perforation and avoid the situation that solid-phase impurities are deposited on the upper part of the piston to block a pressure transmission channel so as to cause incapability of suppressing detonation needs to be developed.
SUMMERY OF THE UTILITY MODEL
Based on prior art not enough, the utility model discloses an aim at changes the current situation that the detonator pin went into the well just receives liquid column pressure, carries out mechanical locking with the piston that has the firing pin, and this locking needs to be thrown the ball and suppresses and just can remove, and any pressure arouses before the locking is removed and can not be used in on the pin. And reverse circulation can be carried out before perforation, a ball is thrown into the ball seat after slurry is replaced and then is pressed, the ball seat cuts the pin and then descends, the piston is unlocked, the piston cuts the pin and descends under the action of the pressure of the hydraulic column, and the firing pin on the piston impacts the explosive cake to finish detonation.
The purpose of the utility model is realized like this: a novel perforation initiator comprises: the device comprises an upper joint, a sealing ring A, a ball seat, a production hole, a pin E, a lower joint, a locking block, a connecting sleeve, a circulating hole, a piston, a sealing ring B, a pin F, a firing pin, a medicine cake, a pressing cap and a piston sleeve.
One end of the upper joint is connected with the oil pipe, and the other end of the upper joint is connected with one end of the lower joint through threads;
four production holes are uniformly distributed on the circumference of the middle part of the upper joint; four circulation holes are uniformly distributed on the circumference of the middle part of the lower joint;
a sealing ring A is arranged in one end of the upper joint close to the oil pipe, the ball seat is arranged on the inner wall of the upper joint, the middle part of the ball seat is connected with the upper joint through a pin E, one end of the ball seat close to the oil pipe is contacted with the sealing ring A, and the outer side of one end of the ball seat far away from the oil pipe is contacted with the locking block;
the connecting sleeve is L-shaped; one end of the connecting sleeve is locked on the lower joint by a locking block; the other end of the connecting sleeve is provided with a thread;
a piston sleeve is arranged between the piston and the inner wall of the lower joint; the piston sleeve is arranged on the sealing ring B and the pin F; the piston is fixed on the piston sleeve through a screw F and is contacted with the sealing ring B;
one end of the piston is also provided with threads, and the connecting sleeve is connected with the piston through the threads;
the other end of the piston is connected with a firing pin.
The tail of the lower joint, which is far away from one section of the upper joint, is provided with a pressing cap, and the medicine cake is placed in a cavity at the tail end of the lower joint and is fixed by the pressing cap.
In the working process, the upper end of the piston is connected with the connecting sleeve, the connecting sleeve is locked by the locking block, the locking block is clamped by the front end of the ball seat, when a ball is thrown into the seat, the ball seat is pressed to cut off the upper pin, the ball seat moves downwards to release the locking block, the ball seat continues to move downwards to the joint of the connecting sleeve at the front end and the piston to cut off the lower pin, and the piston moves downwards to drive the firing pin to strike the explosive cakes to be detonated.
Specifically, novel perforation detonator include the top connection that upper end and oil pipe are connected, the ball seat is connected with the top connection through the pin, the locking piece is withstood in the ball seat lower extreme outside, the adapter sleeve is locked on the lower clutch by the locking piece.
Four production holes are uniformly distributed on the upper connector in the circumferential direction, and after detonation, the ball seat moves downwards to completely expose the production holes to establish a channel for later-stage oil and gas production.
Four circulation holes are uniformly distributed on the upper circumference of the lower connector, the circulation holes are in a normally open state before detonation, fluid in a shaft can enter the pipe column through the circulation holes when the pipe column is lowered, grouting operation is reduced, time is saved, and the circulation hole can be used as a channel for later-period circulation replacement of fluid.
The connecting sleeve and the piston are connected into a whole through threads, and once the connecting sleeve is locked by the locking block, the piston cannot move.
The right side of the piston is connected with a firing pin, after the connecting sleeve is unlocked, the pressure on the left side of the piston pushes the piston to move downwards to cut off the pin, and the firing pin impacts the explosive cake to complete detonation.
Compared with the prior art, the beneficial effects of the utility model reside in that:
this application can improve the success rate of perforation, avoids solid phase impurity to deposit and blocks up the biography pressure passageway and lead to unable the detonation of suppressing on piston upper portion, guarantees initiating explosive device safe handling, practices thrift the working costs of taking off the perforation rifle, changing initiating explosive device etc..
Drawings
FIG. 1 is a schematic diagram of the novel perforation initiator configuration described in the examples;
reference numerals: 1. the device comprises an upper joint, 2, a sealing ring, 3, a ball seat, 4, a production hole, 5, a pin, 6, a lower joint, 7, a locking block, 8, a connecting sleeve, 9, a circulating hole, 10, a piston, 11, a sealing ring, 12, a pin, 13, a firing pin, 14, a medicine cake, 15, a pressing cap, 16 and a piston sleeve.
Detailed Description
The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.
Embodiment of the invention relates to a novel perforating detonator
The perforation initiator comprises: the device comprises an upper connector 1, a sealing ring A2, a ball seat 3, a production hole 4, a pin E5, a lower connector 6, a locking block 7, a connecting sleeve 8, a circulating hole 9, a piston 10, a sealing ring B11, a pin F12, a firing pin 13, a medicine cake 14, a pressing cap 15 and a piston sleeve 16.
One end of the upper joint 1 is connected with an oil pipe, and the other end of the upper joint is connected with one end of the lower joint 6 through threads;
four production holes 4 are uniformly distributed on the circumference of the middle part of the upper joint 1; four circulation holes 9 are uniformly distributed on the circumference of the middle part of the lower joint 6;
a sealing ring A2 is arranged in one end of the upper joint 1 close to the oil pipe, the ball seat 3 is arranged on the inner wall of the upper joint 1, the middle part of the ball seat 3 is connected with the upper joint 1 through a pin E5, one end of the ball seat 3 close to the oil pipe is contacted with the sealing ring A2, and the outer side of one end of the ball seat 3 far away from the oil pipe is contacted with the locking block 7;
the connecting sleeve 8 is L-shaped; one end of the connecting sleeve 8 is locked on the lower joint 1 by the locking block 7; the other end of the connecting sleeve 8 is provided with a thread;
a piston sleeve 16 is arranged between the piston 10 and the inner wall of the lower joint 6; the piston sleeve 16 is arranged on a sealing ring B11 and a pin F12; the piston 10 is fixed on the piston sleeve 16 through a pin F12, and the piston 10 is contacted with the sealing ring B11;
one end of the piston 10 is also provided with threads, and the connecting sleeve 8 is connected with the piston 10 through the threads;
the other end of the piston 10 is connected to a striker 13.
The tail of one section of the lower joint 6 far away from the upper joint 1 is provided with a pressing cap 15, and the medicine cake 14 is placed in a cavity at the tail end of the lower joint 6 and is fixed by the pressing cap 15.
In the working process, the upper end of the piston 10 is connected with the connecting sleeve 8, the connecting sleeve 8 is locked by the locking block 7, the locking block 7 is clamped by the front end of the ball seat 3, the upper pin 5 is cut off by pressing after a ball is placed in the seat, the ball seat 3 descends, the locking block 7 is released, the ball seat 3 continues to descend to the joint of the connecting sleeve 8 at the front end and the piston 10, the lower pin 12 is cut off, and the piston 10 descends to drive the firing pin 13 to strike the explosive cake 14 for detonation.
Specifically, the novel perforation detonator include top connection 1 that upper end and oil pipe are connected, ball seat 3 is connected with top connection 1 through pin 5, 3 lower extreme outsides of ball seat withstand locking piece 7, the adapter sleeve 8 is locked on lower clutch 2 by locking piece 7.
Four production holes 4 are uniformly distributed on the upper circumference of the upper joint 2, and after detonation, the ball seat 3 moves downwards to completely expose the production holes 4 to establish a channel for later-stage oil and gas production.
Four circulation holes 9 are uniformly distributed on the upper circumference of the lower joint 6, the circulation holes 9 are in a normally open state before detonation, fluid in a shaft can enter the pipe column through the circulation holes 9 when the pipe column is lowered, grouting operation is reduced, time is saved, and meanwhile, the circulation replacement liquid channel can be used as a channel for later-period circulation replacement liquid.
The connecting sleeve 8 and the piston 10 are connected into a whole by screw threads, and once the connecting sleeve 8 is locked by the locking block 7, the piston 10 can not move.
The right side of the piston 10 is connected with a firing pin 13, after the connecting sleeve 8 is unlocked, the pressure on the left side of the piston 10 pushes the piston 10 to move downwards to shear the pin, and the firing pin 14 impacts the explosive cake 14 to complete detonation.
This application can improve the success rate of perforation, avoids solid phase impurity to deposit and blocks up the biography pressure passageway and lead to unable the detonation of suppressing on piston upper portion, guarantees initiating explosive device safe handling, practices thrift the working costs of taking off the perforation rifle, changing initiating explosive device etc..
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect.
Claims (7)
1. A novel perforation detonator is characterized in that: the perforation initiator comprises: the device comprises an upper joint, a sealing ring A, a ball seat, a production hole, a pin E, a lower joint, a locking block, a connecting sleeve, a circulating hole, a piston, a sealing ring B, a pin F, a firing pin, a medicine cake, a pressing cap and a piston sleeve; one end of the upper joint is connected with the oil pipe, and the other end of the upper joint is connected with one end of the lower joint through threads; four production holes are uniformly distributed on the circumference of the middle part of the upper joint; four circulation holes are uniformly distributed on the circumference of the middle part of the lower joint.
2. The novel perforation initiator according to claim 1, wherein: the ball seat is arranged on the inner wall of the upper joint, the middle of the ball seat is connected with the upper joint through the pin E, one end of the ball seat, close to the oil pipe, is in contact with the sealing ring A, and the outer side of one end of the ball seat, far away from the oil pipe, is in contact with the locking block.
3. The novel perforation initiator according to claim 1, wherein: the connecting sleeve is L-shaped; one end of the connecting sleeve is locked on the lower joint by a locking block; the other end of the connecting sleeve is provided with a thread.
4. The novel perforation initiator according to claim 1, wherein: a piston sleeve is arranged between the piston and the inner wall of the lower joint; the piston sleeve is arranged on the sealing ring B and the pin F; the piston is fixed on the piston sleeve through a screw F and is contacted with the sealing ring B.
5. The novel perforation initiator according to claim 1, wherein: one end of the piston is also provided with threads, and the connecting sleeve is connected with the piston through the threads; the other end of the piston is connected with a firing pin.
6. The novel perforation initiator according to claim 1, wherein: the tail of the lower joint, which is far away from one section of the upper joint, is provided with a pressing cap, and the medicine cake is placed in a cavity at the tail end of the lower joint and is fixed by the pressing cap.
7. The novel perforation initiator according to claim 1, wherein: the circulation holes can be used for circulation of perforating fluid between the oil pipe and the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022440129.8U CN213478308U (en) | 2020-10-28 | 2020-10-28 | Novel perforating exploder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022440129.8U CN213478308U (en) | 2020-10-28 | 2020-10-28 | Novel perforating exploder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213478308U true CN213478308U (en) | 2021-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022440129.8U Active CN213478308U (en) | 2020-10-28 | 2020-10-28 | Novel perforating exploder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213478308U (en) |
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2020
- 2020-10-28 CN CN202022440129.8U patent/CN213478308U/en active Active
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