CN117328841B - Quick connection environment-friendly negative pressure gun - Google Patents
Quick connection environment-friendly negative pressure gun Download PDFInfo
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- CN117328841B CN117328841B CN202311627975.2A CN202311627975A CN117328841B CN 117328841 B CN117328841 B CN 117328841B CN 202311627975 A CN202311627975 A CN 202311627975A CN 117328841 B CN117328841 B CN 117328841B
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- 210000001503 joint Anatomy 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 53
- 238000007789 sealing Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000005474 detonation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000011435 rock Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000003721 gunpowder Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/119—Details, e.g. for locating perforating place or direction
Abstract
The invention provides a quick-connection environment-friendly negative pressure gun, belongs to the technical field of oilfield production equipment, and solves the problems of heavy construction labor intensity, high engineering cost and incapability of environment-friendly operation of the negative pressure gun. The invention comprises a quick connection negative pressure device, a negative pressure gun body, a maintenance-free middle joint and a reusable environment-friendly negative pressure gun tail; the quick connection negative pressure device consists of a quick connection upper connector and a quick connection lower connector, wherein the quick connection upper connector consists of an upper connector main body and an inner hole piston, and the quick connection lower connector consists of a lower connector main body, a telescopic lock pin, a time delay valve body and a large piston. The negative pressure gun tail consists of a negative pressure gun tail main body, a slideway non-return closing type piston, a gun tail support tube and a guide limit pin, and a main body arc-shaped boss and a lock tongue are arranged on the negative pressure gun tail; the channel non-return closing type piston is provided with a round hole, and the cylinder body of the slide channel non-return closing type piston is provided with a guide limit pin slide channel. And a negative pressure device is quickly connected. The negative pressure gun body, the maintenance-free medium negative pressure gun tail are sequentially connected in a threaded mode.
Description
Technical Field
The invention belongs to the technical field of oilfield production equipment, and particularly relates to a quick-connection environment-friendly negative pressure gun.
Background
The dynamic negative pressure perforating process for cable is one well completion perforating technology capable of instantaneously cleaning perforating passage, and features that during dynamic negative pressure perforating, the pressure difference produced by negative pressure gun acts directly on the perforating passage and stratum around the perforating hole, and the technological process is characterized by utilizing the pressure difference inside and outside the wall of the hole to break the compacted zone on the wall of the hole caused by jet flow to restore the permeability of rock around the passage and raise the productivity of oil and gas well. The perforating process can quickly absorb residual detonation energy in a shaft in technical principle, so that the pressure of a perforating layer section is instantaneously reduced, the pressure difference between the shaft and the ground is manufactured, a negative pressure area in the shaft is formed, and the negative pressure value can reach about 7 Mpa. At this moment, the stratum pressure of the perforating section is far greater than the pressure in the shaft, and due to the compact characteristic of the compaction belt in the perforation tunnel, firstly, gas and liquid in the stratum act on the hole wall compacted by the jet flow of the perforating bullet under the action of the pressure, and then the compaction belt is pressed across the hole wall under the action of the instant high pressure, and secondly, the gas and liquid in the rock gap rapidly flow into the well under the action of huge pressure difference, and the generated reflux can clear broken nitrate in the compaction belt and floating sand between the rock gaps in the tunnel, so that the pollution to the perforation tunnel, geological rock gaps and cracks is cleared, and the effects of recovering the permeability of the rock stratum and improving the oil gas productivity are achieved.
The basic structure of the negative pressure gun used for the negative pressure perforation nowadays comprises a negative pressure device, a negative pressure gun body and a negative pressure gun tail. The piston is designed on the negative pressure device, the piston is in a sealed and closed state before construction, after the construction of the negative pressure perforation, the piston of the negative pressure device moves downwards under the action of detonation energy of the perforating gun to fall into the negative pressure gun, so that a liquid inlet of the negative pressure device is in an open state, well liquid after perforation is flushed into the negative pressure gun through the liquid inlet, the well liquid flushed into the negative pressure gun causes loss of well liquid in a shaft, and the lost well liquid is generated instantaneously, namely, negative pressure of a perforation well section is generated, so that the required dynamic negative pressure perforation is realized. In the whole perforation process, the negative pressure gun tail only plays a role in sealing, well liquid in the negative pressure gun cannot be repeatedly assembled and disassembled in the field due to the construction working condition, so that a liquid inlet hole also forms a hole channel for only discharging the well liquid, the well liquid in the negative pressure gun after perforation cannot be timely played back into a construction well, and can only be brought to the surface of the well field by the negative pressure gun for collecting and processing, so that the labor intensity of workers in the well field is greatly increased, and well liquid is easy to flow to the ground to cause environmental pollution in the well field. Therefore, a new technology and a new product which can improve the construction efficiency and the environment-friendly construction more efficiently are more needed in the negative pressure perforation technology and the product.
Disclosure of Invention
In view of the above, in order to solve the problems of heavy construction labor intensity, high engineering cost and incapability of environmental protection operation of the existing negative pressure gun, the invention provides a quick connection environmental protection negative pressure gun, in particular to an environmental protection negative pressure gun which is used for dynamic negative pressure perforation of a cable, can be quickly assembled and connected on an operation site and can be repeatedly used.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the quick connection environment-friendly negative pressure gun comprises a quick connection negative pressure device, a negative pressure gun body, a maintenance-free middle joint and a reusable environment-friendly negative pressure gun tail which are connected in sequence;
the quick connection negative pressure device comprises a quick connection upper connector and a quick connection lower connector, the quick connection upper connector is connected with the quick connection lower connector, the quick connection upper connector comprises an upper connector main body, an inner hole piston, a piston fixing ring and a piston stabilizing nail, the inner hole piston is limited by the piston fixing ring and is fixed by the piston stabilizing nail, and an upper connector arc-shaped boss is arranged at the end part of the upper connector main body; the quick-connection lower connector comprises a lower connector main body, a time delay valve body and a large piston, wherein the time delay valve body and the large piston are installed in the lower connector main body, a valve body micropore which is communicated with a blind hole at the right end of the time delay valve body is processed at the middle section of the time delay valve body, which is close to a sealing groove, a main body micropore which is vertically communicated is formed in the lower connector main body provided with the time delay valve body, a large liquid inlet hole is formed in the lower connector main body provided with the large piston, and a lower connector arc-shaped boss is formed at the end part of the lower connector main body;
the reusable environment-friendly negative pressure gun tail comprises a negative pressure gun tail main body, a slide way non-return closing type piston, a gun tail support tube and a guide limit pin, wherein the slide way non-return closing type piston is installed in the negative pressure gun tail main body, and the slide way non-return closing type piston is limited by the guide limit pin installed on the gun tail support tube.
Furthermore, the quick connection negative pressure device is in threaded connection with the negative pressure gun body, the negative pressure gun body is in threaded connection with the maintenance-free middle joint, and the maintenance-free middle joint is in threaded connection with the reusable environment-friendly negative pressure gun tail.
Furthermore, one end of the inner hole of the maintenance-free middle joint is a horn mouth.
Further, the structural gap between the upper joint body and the inner hole piston is sealed by a rubber ring.
Still further, the diameter of the main body micropore is 2mm, and the diameter of the valve body micropore is 1.5mm.
Furthermore, the quick connection upper connector and the quick connection lower connector are connected in a quick plug-in manner through the telescopic lock pin, when the quick connection lower connector is inserted into the quick connection upper connector and rotates by 90 degrees, the arc-shaped boss of the upper connector and the arc-shaped boss of the lower connector are mutually overlapped, and meanwhile, the telescopic lock pin automatically falls into a hollow groove of the quick connection upper connector to lock the two connectors.
Further, the inner hole piston of the quick connection upper joint is pushed by detonation energy of the perforating gun, the inner hole piston moves downwards to push the delay valve body, after the delay valve body moves for a certain distance, well fluid can enter the cavity in the negative pressure device from the micropore to manufacture a delay effect, the pressure of the well fluid acts on the large piston in the quick connection lower joint and cuts off the stable nail, the large piston is pushed into the negative pressure gun, at the moment, the large liquid inlet is completely opened, the well fluid quickly flows into the negative pressure gun, and the well section is caused to lose pressure to enable the underground perforating area to generate negative pressure.
Furthermore, a round hole is formed in the slide way check type piston, and a guide limit pin slide way is formed in a cylinder of the slide way check type piston.
Furthermore, the end part of the negative pressure gun tail main body is provided with a main body arc-shaped boss and a lock tongue, a torsion spring is arranged on the lock tongue shaft, and after the gun tail support tube is inserted into the negative pressure gun tail main body and then rotated for a certain angle, the lock tongue falls into a limiting slot hole to lock the gun tail support tube.
Furthermore, the end part of the gun stock tube is provided with a support tube arc boss, the tube body of the gun stock tube is provided with a bolt slot hole, the arc lengths of the main body arc boss and the support tube arc boss are smaller than one fourth of the circumference, and after the main body arc boss is inserted into the gun stock tube, the gun stock tube is hung with the support tube arc boss by rotating a certain angle, and when the bolt automatically falls into the bolt slot hole, the bolt is locked and hung.
Compared with the prior art, the quick connection environment-friendly negative pressure gun has the beneficial effects that:
(1) According to the quick connection environment-friendly negative pressure gun, the negative pressure device and the negative pressure gun tail are of quick dismounting structures, the negative pressure gun can be quickly connected with a perforating gun for assembly during construction, the negative pressure gun can be quickly dismounted and maintained after construction, the environment-friendly negative pressure gun tail can be repeatedly used, and construction operation is continued.
(2) According to the quick connection environment-friendly negative pressure gun, the negative pressure device at the connection part of the negative pressure device and the perforating gun is of an inserting and hanging structure, and when the perforating gun is in butt joint with the negative pressure gun, the labor intensity and the working efficiency of operators can be greatly reduced.
(3) The reusable environment-friendly negative pressure gun tail is provided with the piston switch, and the opening and closing of the negative pressure gun tail liquid discharge channel can be realized through the change of the relative position of the piston.
(4) According to the invention, after the dynamic negative pressure perforation is implemented, the gun tail can be automatically opened to timely discharge well liquid in the negative pressure gun into the oil-return gas well, and when the gun tail is closed, the sealing requirement of the negative pressure gun below a kilometer well can be borne. The design of the gun tail solves the difficult problem of environment-friendly operation of dynamic negative pressure perforation, and simultaneously, the gun tail has reusable performance and can reduce the operation cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a quick connect environment-friendly negative pressure gun according to the present invention;
FIG. 2 is a schematic cross-sectional view of a quick connect negative pressure device according to the present invention;
FIG. 3 is a schematic cross-sectional view of a quick connect upper connector according to the present invention;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic cross-sectional view of a quick connect lower connector according to the present invention;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a schematic cross-sectional view of a time delay valve body according to the present invention;
FIG. 8 is a schematic cross-sectional view of a reusable environmentally friendly negative pressure firearm tail according to the present invention;
FIG. 9 is a schematic cross-sectional view of a negative pressure butt body according to the present invention;
fig. 10 is a left side view of fig. 9;
FIG. 11 is a schematic cross-sectional view of a middle butt stock according to the present invention;
FIG. 12 is a schematic cross-sectional view of a slide check piston according to the present invention;
fig. 13 is a cross-sectional view of B-B of fig. 12.
In the figure: the quick connection negative pressure device 1, a negative pressure gun body 2, a maintenance-free middle joint 3, a reusable environment-friendly negative pressure gun tail 4, a detachable quick connection upper joint 101, a quick connection lower joint 102, an upper joint main body 1011, an inner hole piston 1012, a piston fixing ring 1013, a piston stabilizing nail 1014, an upper joint arc boss 10111, a lower joint main body 1021, a telescopic lock pin 1022, a large liquid inlet 1023, a delay valve 1024, a large piston 1025, a valve body micropore 10241, a main body micropore 1026, a lower joint arc boss 10211, a negative pressure gun tail main body 401, a slide check-type piston 402, a gun tail support cylinder 403, a guide limit pin 404, a main body arc boss 4011, a lock tongue 4012, a guide limit pin slide 4021, a round hole 4022, a lock tongue long hole 4031 and a support cylinder arc boss 4032.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, in the case of no conflict, embodiments of the present invention and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.
The quick-connection environment-friendly negative pressure gun is used for dynamic negative pressure perforation of cables, can be quickly assembled on an operation site and can be repeatedly used. The quick connection environment-friendly negative pressure gun is a root capable of quickly completing dynamic negative pressure perforation of a cable and realizing environment-friendly operation, and is also a key technology for distinguishing the dynamic negative pressure perforation of a common cable.
Referring to fig. 1-13 for illustrating the present embodiment, a quick connection environment-friendly negative pressure gun includes a quick connection negative pressure device 1, a negative pressure gun body 2, a maintenance-free middle joint 3 and a reusable environment-friendly negative pressure gun tail 4 which are sequentially connected, the quick connection negative pressure device 1 is in threaded connection with the negative pressure gun body 2, the negative pressure gun body 2 is in threaded connection with the maintenance-free middle joint 3, and the maintenance-free middle joint 3 is in threaded connection with the reusable environment-friendly negative pressure gun tail 4.
The quick connection negative pressure device 1 is of a quick detachable two-body structure, and is divided into a quick connection upper connector 1 and a quick connection lower connector 2, wherein the quick connection upper connector 1 is assembled at the lower end of a perforating gun through threads to replace the gun tail of the perforating gun. The quick connection lower joint 2 is assembled at the upper end of the negative pressure gun through threads, and forms an environment-friendly dynamic negative pressure gun together with the negative pressure gun body 2, the maintenance-free middle joint 3 and the reusable environment-friendly negative pressure gun tail 4. The quick connect upper connector 101 is composed of an upper connector body 1011 and an inner hole piston 1012, the inner hole piston is limited by a piston fixing ring 1013 and is fixed by a piston stabilizing nail 1014, the inner hole piston 1012 can only move unidirectionally to the right, a structural gap between the inner hole piston 1012 and the main body of the quick connect upper connector 101 is sealed by a rubber ring, and a middle hole of the upper connector 101 is plugged. An upper joint arc-shaped boss 10111 is arranged at the end part of the upper joint main body 1011; the quick connection lower joint 102 comprises a lower joint main body 1021, a telescopic lock pin 1022, a time delay valve body 1024 and a large piston 1025, wherein the time delay valve body 1024 and the large piston 1025 are arranged in the lower joint main body 102, one side, close to a sealing groove, of the time delay valve body 1024 is provided with a valve body micropore 10241 communicated with an internal cavity, the lower joint main body 102 provided with a time delay valve body 1024 section is provided with a main body micropore 1026 communicated with the internal cavity of the time delay valve body 1024, the main body provided with the large piston 1025 is provided with a large liquid inlet 1023, and the end part of the lower joint main body 1021 is provided with a lower joint arc-shaped boss 10211.
The quick connection upper connector 101 and the quick connection lower connector 102 are connected through quick plug connection, the quick connection lower connector 102 is a male connector, the quick connection upper connector 101 is a female connector, when the quick connection lower connector 102 is inserted into the quick connection upper connector 101 and rotates by 90 degrees, the arc-shaped boss 10111 of the upper connector and the arc-shaped boss 10211 of the lower connector are mutually lapped, meanwhile, the retractable lock pin 1022 automatically falls into a hollow groove of the quick connection upper connector 101 to lock the upper connector and the lower connector from rotating, the upper connector and the lower connector after connection are ensured not to be separated from each other to be disconnected, and locking of the two connectors is realized.
The connected quick connection negative pressure device 1 has enough intensity to bear the negative pressure gun of lower extreme, the inside piston of quick connection negative pressure device 1 has linkage effect, the hole piston is by the promotion of perforating gun detonation energy to move down, linkage promotion time delay valve body 1024 cuts steady nail and moves down, valve body micropore 10241 aligns main part micropore 1026 this moment, well liquid fills the cavity through two micropores, when the liquid pressure in the cavity is greater than 10Mpa, cut big piston 1025 steady nail, push away big piston 1025 in the negative pressure gun barrel, at this moment, big feed liquor hole 1023 is opened completely, well liquid gushes into in the negative pressure gun fast, cause the well section decompression and produce the negative pressure.
The quick connection negative pressure device 1 is internally provided with a linkage piston, the inner hole piston 1012 of the quick connection upper joint 101 is pushed by detonation energy of the perforating gun, the quick connection upper joint moves downwards to push the delay valve body 1024, after the delay valve body 1024 moves for a certain distance, well fluid can enter the cavity of the quick connection negative pressure device 1 from micropores to manufacture a delay effect, about 100 milliseconds is achieved, the pressure of the well fluid acts on the large piston 1025 in the quick connection lower joint 102 and shears a stable nail, and the large piston 1025 is pushed into the negative pressure gun. At this time, the large liquid inlet 1023 is completely opened, well liquid quickly flows into the negative pressure gun, and the well section is decompressed to generate negative pressure in the underground perforation area.
The structural gap between the upper adapter body 1011 and the internal bore piston 1012 is sealed by a rubber ring.
The diameter of the main body microwells 1026 is 2mm. The diameter of the valve body micropore 10241 is 1.5mm.
The aperture of the valve body micropore 10241 is smaller than that of the main body micropore 1026, the valve body micropore 10241 is communicated with the right end blind hole of the delay valve body 1024, the internal cavities of the delay valve body 1024 and the large piston 1025 are completely filled with the liquid flow passing through the valve body micropore 10241 after being controllable for about 100 milliseconds, the effect of delaying the manufacture of negative pressure after the composite perforation is achieved, the large piston 1025 is separated from the large liquid inlet 1023 of the main body open negative pressure device, sufficient combustion boosting time is provided for the gunpowder of the composite perforation, and the effect of the gunpowder combustion pressure on perforation tunnels and stratum is ensured.
The reusable environment-friendly negative pressure gun tail 4 consists of a negative pressure gun tail main body 401, a slideway non-return closing type piston 402, a gun tail support tube 403 and a guiding limit pin 404, wherein the slideway non-return closing type piston 402 is arranged in the negative pressure gun tail main body 401 and is limited by the guiding limit pin 404 arranged on the gun tail support tube 403. The end part of the negative pressure gun tail main body 401 is provided with a main body arc-shaped boss 4011 and a lock tongue 4012; a round hole 4022 is formed in the slideway check-closing type piston 402, and a guide limit pin slideway 4021 is formed in a cylinder of the slideway check-closing type piston 402; the end of the stock 403 is provided with a stock arc boss 4032, and the barrel of the stock 403 is provided with a bolt slot 4031.
The torsion spring is arranged on the shaft of the lock tongue 4012, and after the support cylinder is inserted into the negative pressure gun tail main body 401 and rotated for a certain angle, the lock tongue 4012 falls into the limiting slot hole to lock the gun tail support cylinder 403.
The negative pressure gun tail 4 on the device adopts a structural design which can be maintained and reused on site, and can automatically open a gun tail liquid drainage channel in the construction process, and well liquid in the negative pressure gun is drained back into a shaft before the perforating gun is lifted out of a well head, so that environment-friendly operation is realized. The slide way non-return closing type piston 402 of the reusable environment-friendly negative pressure gun tail 4 is arranged in the axial hole of the negative pressure gun tail main body 401 and is fixed by the anti-falling stable nail, and the gun tail is in a closed state at the moment. The gun tail support tube and the negative pressure gun tail main body 401 can be rapidly disassembled and are clamped and connected together through the arc-shaped bosses on the main bodies, the arc-shaped bosses 4011 of the main bodies and the arc-shaped bosses 4032 of the gun tail are symmetrically distributed, and the arc length of the bosses is smaller than 1/4 of the circumference. When the bolt 4012 automatically falls into the bolt slot 4031, the bolt support tube 403 is locked, the bolt support tube 403 is installed, and the bolt can be detached and maintained by reverse operation. One end of the glide slope of the slide check type piston 402 extends out from the lower hole of the stock 403 and the movement track of the slide check type piston 402 is regulated by the guide limit pin 404. The large piston 1025 falling off from the negative pressure device 1 after perforation hits the slideway non-return closing type piston 402 and shears the anti-falling stabilizing nail, and falls into the gun tail support tube 403 under the guidance of the guiding limit pin 404, at the moment, the gun tail automatically opens the liquid discharge channel, and the well liquid in the negative pressure gun can be emptied when the negative pressure gun leaves the well liquid level.
The slideway non-return closing type piston 402 plays a role of sealing the gun tail to ensure construction safety, and can open a gun tail liquid drainage channel after perforation and discharge well liquid in the negative pressure gun into the well. In order to improve the construction efficiency and reduce the cost, the method can be reused on a well site. The gun tail in the pre-construction state, the slideway non-return closing type piston 402 is provided with a rubber ring, one end of the piston is plugged into the inner hole of the negative pressure gun tail main body 401, and the gap between the piston and the negative pressure gun tail main body is sealed by the rubber ring. The other end of the piston rod penetrates out of the lower hole of the gun stock 403, and two symmetrical guide limit pins 404 are inserted into a guide limit pin slideway 4021 to guide the falling track of the slideway non-return piston 402.
The middle section of the slideway non-return closing type piston 402 is provided with three uniformly distributed round holes for increasing a liquid discharge channel. The assembled reusable negative pressure gun with the environment-friendly negative pressure gun tail 4 can bear working pressure below 70 Mpa. The liquid column of the working well can generate oscillating pressure waves after the negative pressure perforation operation, and the slideway non-return closing type piston 402 can be plugged back to the negative pressure gun tail main body 401 again under the action of the pressure waves to close the liquid discharge channel. To prevent this, after the negative pressure butt 4 is fully opened, the slide check piston 402 is guided by the guide limit pin 404 to slide into the limit section of the guide limit pin slide 4021, preventing the piston from closing the negative pressure butt 4 under the action of the oscillating pressure wave. The slide way check type piston 402 with the slide way is a hollow pipe, and well fluid in the negative pressure gun can be discharged out of the negative pressure gun through a side hole of the hollow pipe and a lower hole of a gun stock tube.
One end of the inner hole of the maintenance-free middle joint 3 is a bell mouth.
In order to ensure that the negative pressure gun can be reused in an operation site, the maintenance-free middle joint 3 is arranged between the negative pressure gun and the negative pressure gun tail 4, the large opening end of the maintenance-free middle joint 3 is a Tr90×4 thread and a sealing groove matched with the perforating negative pressure gun, and the other end is connected with the negative pressure gun tail main body 401 by using the Tr90×4 thread. After the end with the bell mouth of the maintenance-free middle joint 3 is screwed into the threads of the negative pressure gun, the internal threads of the negative pressure gun are protected from being polluted by mud sand, so that the negative pressure gun tail 4 can be repeatedly assembled and disassembled on an operation site. The large cone angle with the horn mouth end can smoothly clean residues such as sand and falling objects in the negative pressure gun after the leading-out operation, and provides conditions for the repeated use of the negative pressure gun barrel and the negative pressure gun tail 4.
The tail of the existing negative pressure gun is a dead plug, when the gun is perforated, well fluid is taken to the ground of a well site after flowing into the negative pressure gun from a liquid inlet hole of a negative pressure device at the upper end, the environment pollution of the well site is easily caused during treatment, and the operation labor intensity of operators is also increased. The negative pressure gun tail 4 used for the quick connection environment-friendly negative pressure gun can automatically open a liquid discharge channel after perforation, well liquid in the negative pressure gun is reinjected into an oil-gas well for perforation construction, the well liquid is not carried to the ground of a well site, the construction environment is polluted, an operator is not required to collect and process the well liquid after perforation at the well site, the labor intensity of the operator is greatly reduced, and the used negative pressure gun tail 4 can be reused after simple maintenance and inspection at the well site, so that the operation cost is further reduced.
During maintenance and inspection, only the negative pressure gun tail 4 needs to be detached from the lower end of the maintenance-free middle joint 3, the rubber ring on the slide way check-closing type piston 402 is inspected or replaced, the anti-falling stabilizing nails are replaced, then the silt residues and falling objects in the negative pressure gun are poured out from the inner hole of the maintenance-free middle joint 3, the massive residues and falling objects in the negative pressure gun are cleaned, and the negative pressure gun body and the negative pressure gun tail 4 can be reused for the subsequent negative pressure perforation.
Before the negative pressure perforation of the cable, the quick connection upper connector 101 is firstly provided with a sealing rubber ring, the sealing grease is coated, then the threaded end of the quick connection upper connector is in threaded connection with the upper end of the negative pressure gun, the maintenance-free middle connector 3 provided with the sealing grease is coated on the sealing rubber ring, the lower end of the negative pressure gun is screwed through threads, the bell mouth end of the maintenance-free middle connector 3 faces upwards, then the reusable environment-friendly negative pressure gun tail 4 is assembled on the maintenance-free middle connector 3, the tail end of the negative pressure gun is blocked, the negative pressure gun forms a closed cavity, a pressure difference space is provided for manufacturing pressure reduction (negative pressure) in a perforation section during the negative pressure perforation, and the assembled dynamic negative pressure perforating gun is ready for use.
During perforation, the threaded end of the quick-connection upper connector 101 is well in threaded connection with the tail part of the perforating gun, and the base part of the perforating gun is blocked. Before the perforating gun goes down the well, the quick connection lower connector 102 of the negative pressure gun is inserted into the quick connection upper connector 102, then the perforating gun is stabilized, the negative pressure gun is rotated by 90 degrees, and when the retractable lock pin 1022 automatically falls into a hollow groove of the quick connection upper connector 102, the connection assembly of the dynamic negative pressure perforating pipe column is completed. The perforating string is conveyed to a perforating layer section of an oil-gas well by a cable, after the perforating gun is ignited and perforated, detonation energy of the perforating gun drives an inner hole piston to move downwards, a linkage push delay valve body 1024 shears a stable nail to move downwards, at the moment, valve body micropores 10241 are aligned with main body micropores 1026, well liquid fills a cavity through the two micropores, when the liquid pressure in the cavity is greater than 10Mpa, a large piston 1025 is sheared to stabilize the nail, the large piston 1025 is pushed into a negative pressure gun barrel, at the moment, a large liquid inlet 1023 is completely opened, well liquid quickly floods into the negative pressure gun, and the well section is decompressed to generate negative pressure. The large piston 1025 falling at high speed impacts the end of the slideway non-return closing type piston 402, and pushes the slideway non-return closing type piston 402 to shear off the anti-falling stable nail and open a liquid discharge channel of the negative pressure gun tail 4. And in the process of extracting the perforating string back to the wellhead by the cable, when the negative pressure gun leaves the liquid level of the well liquid, the well liquid in the negative pressure gun is discharged and injected back into the well along the liquid discharging channel, and after the well liquid is discharged, the perforating string is retracted to the ground and then the subsequent perforation is repeated.
The embodiments of the invention disclosed above are intended only to help illustrate the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (9)
1. The utility model provides a quick connect environmental protection negative pressure rifle which characterized in that: comprises a quick connection negative pressure device (1), a negative pressure gun body (2), a maintenance-free middle joint (3) and a reusable environment-friendly negative pressure gun tail (4) which are connected in sequence;
the quick connection negative pressure device (1) comprises a quick connection upper connector (101) and a quick connection lower connector (102), the quick connection upper connector (101) is connected with the quick connection lower connector (102), the quick connection upper connector (101) comprises an upper connector main body (1011), an inner hole piston (1012), a piston fixing ring (1013) and a piston stabilizing nail (1014), the inner hole piston (1012) is limited by the piston fixing ring (1013) and is fixed by the piston stabilizing nail (1014), and an upper connector arc boss (10111) is arranged at the end part of the upper connector main body (1011); the quick-connection lower connector (102) comprises a lower connector main body (1021), a time-delay valve body (1024) and a large piston (1025), wherein the time-delay valve body (1024) and the large piston (1025) are arranged in the lower connector main body (1021), a valve body micropore (10241) is processed in the middle section of the time-delay valve body (1024) close to a sealing groove and is communicated with a blind hole at the right end of the time-delay valve body (1024), a vertically communicated main body micropore (1026) is formed in the lower connector main body (1021) provided with the time-delay valve body (1024), a large liquid inlet hole (1023) is formed in the lower connector main body (1021) provided with the large piston (1023), and a lower connector arc-shaped boss (10211) is formed at the end part of the lower connector main body (1021);
the reusable environment-friendly negative-pressure gun tail (4) comprises a negative-pressure gun tail main body (401), a slideway non-return closing type piston (402), a gun tail support tube (403) and a guide limit pin (404), wherein the slideway non-return closing type piston (402) is arranged in the negative-pressure gun tail main body (401), and the slideway non-return closing type piston (402) is limited by the guide limit pin (404) arranged on the gun tail support tube (403);
the quick connection upper joint (101) and the quick connection lower joint (102) are connected in a quick plug-in manner through the telescopic lock pin (1022), when the quick connection lower joint (102) is inserted into the quick connection upper joint (101) and rotates for 90 degrees, the arc-shaped boss (10111) of the upper joint and the arc-shaped boss (10211) of the lower joint are mutually overlapped, and meanwhile, the telescopic lock pin (1022) automatically falls into a hollow groove of the quick connection upper joint (101) to lock the two joints;
the end of the gun tail support tube (403) is provided with a support tube arc-shaped boss (4032), a bolt slot hole (4031) is formed in the tube body of the gun tail support tube (403), the main body arc-shaped boss (4011) is inserted into the gun tail support tube (403) and then is connected with the support tube arc-shaped boss (4032) in a hanging mode through rotating a certain angle, and when a bolt (4012) automatically falls into the bolt slot hole (4031) and then is locked and connected in a hanging mode.
2. The quick connect environment friendly negative pressure gun of claim 1, wherein: the quick connection negative pressure device (1) is in threaded connection with the negative pressure gun body (2), the negative pressure gun body (2) is in threaded connection with the maintenance-free middle joint (3), and the maintenance-free middle joint (3) is in threaded connection with the reusable environment-friendly negative pressure gun tail (4).
3. The quick connect environment friendly negative pressure gun of claim 1, wherein: one end of the inner hole of the maintenance-free middle joint (3) is a horn mouth.
4. The quick connect environment friendly negative pressure gun of claim 1, wherein: the structural gap between the upper joint body (1011) and the inner bore piston (1012) is sealed by a rubber ring.
5. The quick connect environment friendly negative pressure gun of claim 1, wherein: the diameter of the main body micropore (1026) is 2mm, and the diameter of the valve body micropore (10241) is 1.5mm.
6. The quick connect environment friendly negative pressure gun of claim 1, wherein: the inner hole piston (1012) of the quick connection upper connector (101) is pushed by detonation energy of the perforating gun, the inner hole piston moves downwards to push the delay valve body (1024), after the delay valve body (1024) moves for a certain distance, well fluid can enter the inner cavity of the quick connection negative pressure device (1) from micropores to manufacture delay effect, the pressure of the well fluid is applied to the large piston (1025) in the quick connection lower connector (102) and cuts off a stable nail, the large piston (1025) is pushed to fall into the negative pressure gun, at the moment, the large liquid inlet (1023) is completely opened, the well fluid quickly flows into the negative pressure gun, and the well section is decompressed to generate negative pressure in a downhole perforating area.
7. The quick connect environment friendly negative pressure gun of claim 1, wherein: the slide check-closing type piston (402) is provided with a round hole (4022), and the cylinder of the slide check-closing type piston (402) is provided with a guide limit pin slide (4021).
8. The quick connect environment friendly negative pressure gun of claim 7, wherein: the end part of the negative pressure gun tail main body (401) is provided with a main body arc-shaped boss (4011) and a lock tongue (4012), a torsion spring is arranged on the lock tongue (4012) in a shaft, and after the gun tail support tube (403) is inserted on the negative pressure gun tail main body (401) and then rotates for a certain angle, the lock tongue (4012) falls into a limiting slot hole to lock the gun tail support tube (403).
9. The quick connect environment friendly negative pressure gun of claim 8, wherein: the arc length of the main body arc-shaped boss (4011) and the arc length of the supporting barrel arc-shaped boss (4032) are smaller than one quarter of the circumference.
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| CN202311627975.2A CN117328841B (en) | 2023-12-01 | 2023-12-01 | Quick connection environment-friendly negative pressure gun |
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| CN117307110B (en) * | 2023-12-01 | 2024-02-27 | 大庆金祥寓科技有限公司 | Reusable slideway non-return closing type environment-friendly dynamic negative pressure gun tail |
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