CN108425661B - Continuous oil pipe steel shot jet perforation device - Google Patents
Continuous oil pipe steel shot jet perforation device Download PDFInfo
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- CN108425661B CN108425661B CN201810335324.9A CN201810335324A CN108425661B CN 108425661 B CN108425661 B CN 108425661B CN 201810335324 A CN201810335324 A CN 201810335324A CN 108425661 B CN108425661 B CN 108425661B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 115
- 239000010959 steel Substances 0.000 title claims abstract description 115
- 239000007788 liquid Substances 0.000 claims abstract description 235
- 238000003860 storage Methods 0.000 claims abstract description 35
- 239000004576 sand Substances 0.000 claims abstract description 28
- 238000004873 anchoring Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 74
- 239000012530 fluid Substances 0.000 claims description 37
- 238000007789 sealing Methods 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 13
- 210000002445 nipple Anatomy 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000011259 mixed solution Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 238000005516 engineering process Methods 0.000 description 7
- 239000011435 rock Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
Classifications
-
- 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
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention belongs to the field of petroleum drilling and production, and particularly relates to a coiled tubing steel shot jet perforation device which comprises a perforation liquid storage tank, a sand mixing pump, a steel shot storage tank, a screw conveyor, a fracturing pump, a liquid inlet valve body, a liquid discharge valve body, a cable car, a coiled tubing, a whipstock, an anchoring device, a righting device, a perforating device, a nozzle and the like.
Description
Technical Field
The invention relates to a continuous oil pipe steel shot jet perforation device, and belongs to the field of petroleum drilling and production.
Background
In recent years, old oil fields in China generally enter the later period of exploitation, how to ensure stable production of the old oil fields is very important, and newly-increased oil field reserves are mostly compact low-permeability heavy oil reservoirs, so that exploitation difficulty is high. At present, unconventional resources such as shale oil gas and coal bed gas become development hotspots gradually, and in order to improve oil gas yield, perforation fracturing mode is adopted to carry out yield increase improvement on a reservoir at present, but conventional perforation has the problems of small perforation diameter, shallow perforation depth, long construction time, easiness in causing reservoir compaction injury, low reservoir permeability in perforation areas, poor yield increase effect and the like. With the continuous development of the coiled tubing technology, the technology has been widely applied to the petroleum engineering fields of sand washing, gas lifting, paraffin removal, acidification, waxing, drilling, perforation, descaling and the like, the coiled tubing technology can remarkably improve the maneuverability of construction operation, improve the automation degree, greatly improve the operation efficiency, reduce the cost, and enable the operation to be safer and more environment-friendly, and with the update and improvement of special equipment of the coiled tubing technology, the coiled tubing technology can play a greater advantage in the petroleum drilling and production field. The particle impact drilling technology is one of effective ways for solving the problems of low drilling speed and high cost of the existing deep well hard stratum and strong abrasive stratum, and the technology is characterized in that a certain proportion of steel particles are added into drilling fluid, and the steel particles are sprayed out after being accelerated by a downhole drill bit nozzle under the carrying of the drilling fluid, so that the rock breaking efficiency of the rock can be effectively improved, the mechanical drilling speed is improved, and the drilling cost is reduced.
Based on the analysis, the invention provides a coiled tubing steel shot jet perforation device, the method can realize the high-pressure effective sealing of a fracturing pump to solid-liquid two-phase fluid mixed with large-diameter high-density steel shot through an improved liquid inlet valve body and liquid outlet valve body structure on the ground, the service life of the liquid inlet valve body and the liquid outlet valve body of the fracturing pump is prolonged, steel shot and fluid are conveyed to a downhole perforation tool by using a coiled tubing, the tripping efficiency is improved, the steel shot and the fluid are sprayed out from an optimally designed nozzle in the downhole, the high-speed and high-frequency impact of the steel shot on a casing and stratum rock is realized, compared with the conventional hydraulic sand blasting perforation (quartz sand), the density of the steel shot is high, the diameter is large, the shape is regular, the carried energy is high, the penetration efficiency of the casing and a cement ring can be effectively improved, the diameter of a casing hole is increased, the perforation depth and the diameter of a stratum are greatly increased, the oil discharge area of a reservoir is increased, the oil gas flow capacity is improved, and the yield of the reservoir is increased.
Disclosure of Invention
The invention aims to solve the technical problems that: the continuous oil pipe steel particle jet perforation device can realize effective high-pressure sealing of the fracturing pump on large-diameter high-density steel particle solid-liquid two-phase fluid, steel particles and fluid are conveyed through the continuous oil pipe, the tripping efficiency is improved, the steel particles and the fluid are sprayed out from nozzles which are optimally designed in the underground, the casing pipe and the cement ring are penetrated rapidly, the perforation depth and the diameter are effectively increased, and the reservoir yield is increased.
The invention relates to a coiled tubing steel shot jet perforation device which comprises a perforation liquid storage tank, a sand mixing pump, a steel shot storage tank, a screw conveyor, a fracturing pump, a liquid inlet valve body, a liquid discharge valve body, a cable car, an injector, a blowout preventer, a coiled tubing, a whipstock, an anchoring device, a cement ring, a sleeve, a connecting nipple, a centralizing device, a perforation device, a nozzle, perforation holes, a packer and a positioning device. The perforating liquid storage tank is cylindrical and can store perforating liquid, the perforating liquid in the perforating liquid storage tank is conveyed to the sand mixing pump through a pipeline, the steel particle storage tank is of an upper hemispherical structure, a lower hemispherical structure and a middle cylindrical structure, steel particles can be stored, smooth falling of the steel particles can be achieved, the steel particles are prevented from being deposited and blocked in the steel particle storage tank, a screw conveyor is arranged at an outlet at the lower part of the steel particle storage tank, the steel particles in the steel particle storage tank can be conveyed to the sand mixing pump through the screw action of a blade, the perforating liquid and the steel particles are conveyed to the fracturing pump through the pipeline after being uniformly mixed by the sand mixing pump, three liquid inlet valve bodies and three liquid outlet valve bodies are arranged at the front end of the fracturing pump, the liquid inlet valve bodies are arranged at the lower part of the fracturing pump, the liquid outlet valve bodies are arranged at the upper part of the fracturing pump, grooves with a certain distance are formed in the surface of the liquid inlet valve seat inside the liquid inlet valve bodies, when the liquid inlet valve seat is contacted with the liquid inlet valve bodies, if large-diameter high-density steel particles are blocked in the grooves, high-pressure sealing of the liquid inlet valve bodies and the liquid inlet balls can be achieved, after the liquid inlet particles and the liquid inlet balls are separated from the liquid inlet valve bodies through the pipeline, the liquid inlet valve bodies and the liquid inlet balls can be conveyed to the fracturing pump through the pipeline in sequence, and the pipeline-outlet valve bodies, and the liquid inlet valve bodies are separated from the liquid inlet valve bodies and the liquid inlet valve bodies through the valve bodies and the grooves and the continuous carrier grooves, and the pipeline are conveyed to the continuous oil pipe. The whipstock is arranged at the lower part of the straight well section, the whipstock is fixed in the casing through an anchoring device at the lower part, the whipstock can guide the continuous oil pipe to enter a designed track, the connecting nipple is arranged at the tail part of the continuous oil pipe, the connection of the continuous oil pipe and a centralizing device is realized, the centralizing device can ensure the centering of the continuous oil pipe and the perforating device, the continuous oil pipe and the perforating device can smoothly pass through a borehole, simultaneously, the smooth operation of perforation is ensured, the perforating device is arranged at the lower part of the centralizing device, the nozzles are distributed at the periphery of the perforating device, steel particles and perforating liquid sequentially enter the connecting nipple, the centralizing device and the perforating device and then are sprayed out at a high speed through the nozzles, the casing and a cement ring are penetrated through, perforation holes are formed in the stratum, the depth and the diameter of the perforation ring are increased, a plurality of nozzle mounting ports are arranged on the perforating device, the number of nozzle mounting can be selected, the rest nozzles are blocked by blind nozzles, the packer is arranged at the lower part of the perforating device, fluid and pressure in the perforation can be sealed, the lower part of the packer, the position and orientation can be positioned, the mixed liquid and the position of the steel particles can move along the direction of the perforating device and the mixed liquid reach the perforation pump and the perforation ring through the perforating pump, the perforation ring and the perforation ring after the mixed liquid passes through the perforating pump and the perforating ring, the perforation ring passes through the perforating pump and the perforating ring, and the perforation pump passes through the perforation pump sequentially, and the perforation ring.
The liquid inlet valve body can realize the on-off control of the liquid inlet of the fracturing pump, the liquid inlet valve spring is arranged on the upper part of the liquid inlet valve body, the lower liquid inlet valve ball is controlled to reciprocate under the action of spring force to control the entry of fluid, the liquid inlet valve seat is arranged on the lower part of the liquid inlet valve ball, the sealing of the liquid inlet fluid is realized through the cooperation of the liquid inlet valve ball and the contact spherical surface of the liquid inlet valve seat, a series of grooves with a certain distance are arranged on the surface of the liquid inlet valve seat, when the liquid inlet valve ball contacts with the liquid inlet valve seat, if steel particles with large diameters are blocked in the middle, the steel particles can enter the grooves on the surface of the liquid inlet valve seat under the mutual pressing action of the liquid inlet valve ball and the liquid inlet valve seat, the close fitting of the liquid inlet valve ball and the sealing surface of the liquid inlet valve seat is ensured, and the high-pressure sealing of the liquid inlet valve body is realized. The liquid discharge valve body can realize the on-off control of fracturing pump liquid discharge, the liquid discharge valve spring is installed on the upper portion of the liquid discharge valve body, the liquid discharge valve ball at the lower portion is controlled to reciprocate by utilizing the elastic force, the liquid discharge valve seat is arranged at the lower portion of the liquid discharge valve ball, the liquid discharge fluid is sealed through the cooperation of the liquid discharge valve ball and the liquid discharge valve seat contact sphere, a series of grooves with certain intervals are formed in the surface of the liquid discharge valve seat, when the liquid discharge valve ball is contacted with the liquid discharge valve seat, if steel particles with large diameters are blocked in the middle, the steel particles enter the grooves in the surface of the liquid discharge valve seat under the action of mutual pressing of the liquid discharge valve ball and the liquid discharge valve seat, the close fit of the liquid discharge valve ball and the sealing surface of the liquid discharge valve seat is guaranteed, and the high-pressure sealing of the liquid discharge valve body is realized.
The nozzle is arranged on the surface of the perforating device, is connected with the perforating device through threads, can adjust the jet direction of steel particles sprayed out of the nozzle by changing the angle and the direction of a threaded hole of the perforating device, further realizes the adjustment of the perforating direction, is made of hard alloy, comprises four parts, and comprises an arc section, a cone angle section, a straight line section and an expansion section from top to bottom in sequence, wherein the length ratio of the arc section to the cone angle section to the straight line section to the expansion section is 1:3:2:0.4, the cone angle of the cone angle section is 30-40 degrees, the ratio of the length of the nozzle to the inner diameter of the straight line section is 4-6, the cone angle of the expanding section is 100-120 degrees, and the expanding section can enable steel particles and fluid accelerated by the straight line section to be ejected from the nozzle more smoothly, so that the flow field of the steel particle jet flow is optimized.
The invention relates to a continuous oil pipe steel shot jet perforation device, which comprises the following specific operation steps:
the first step: after the well bore is cleaned, connecting the well surface pipeline, and opening an oil pipe and a sleeve valve after the pressure test is qualified;
and a second step of: starting a cable car, conveying a connecting nipple, a centralizing device, a perforating device, a packer and a positioning device to the underground by using a continuous oil pipe, and positioning and depth correction are carried out;
and a third step of: starting a sand mixing pump, a fracturing pump and a valve of a perforating fluid storage tank, and enabling perforating fluid to enter a shaft after passing through the sand mixing pump and the fracturing pump until the perforating fluid is filled in the shaft;
fourth step: opening a valve of a steel particle storage tank, starting a screw conveyor, conveying perforating liquid and steel particles to a sand mixing pump, pressurizing by a fracturing pump, and conveying the perforating liquid and the steel particles to an underground perforating device through a continuous oil pipe, wherein the steel particles and the perforating liquid are sprayed out of a nozzle to impact a sleeve, a cement ring and a stratum, so that a perforating process is completed;
fifth step: and closing a valve of the steel grain storage tank, closing the screw conveyor, only injecting perforating liquid into the shaft, and closing the sand mixing pump and the fracturing pump after the residual steel grains in the shaft are carried, and spraying Guan Jingfang to finish construction operation.
The beneficial effects of the invention are as follows: the fracturing pump can effectively seal large-diameter high-density steel particle solid-liquid two-phase fluid at high pressure, steel particles and fluid are conveyed through the continuous oil pipe, the tripping efficiency is improved, the underground steel particles and fluid are sprayed out through the optimally designed nozzles, the quick penetration of the sleeve and the cement ring is realized, the perforation depth and the diameter of the stratum are effectively increased, the oil drainage area of a reservoir is increased, and the yield of the reservoir is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. perforating fluid storage tank 2, sand mixing pump 3, steel shot storage tank 4, screw conveyer 5, fracturing pump 6, feed liquor valve body 7, flowing back valve body 8, cable car 9, injector 10, preventer 11, coiled tubing 12, whipstock 13, anchor device 14, cement sheath 15, sleeve 16, connection nipple 17, righting device 18, perforating device 19, nozzle 20, perforation hole 21, packer 22, positioner 23, stratum.
Fig. 2 is a schematic structural view of the liquid inlet valve body and the liquid outlet valve body of the present invention.
In the figure: 6-1, a liquid inlet valve spring 6-2, a liquid inlet valve ball 6-3, a liquid inlet valve seat 7-1, a liquid discharge valve spring 7-2, a liquid discharge valve ball 7-3 and a liquid discharge valve seat.
FIG. 3 is a schematic view of the structure of the nozzle of the present invention.
In the figure: 19-1, a nozzle body 19-2, an arc section 19-3, a cone angle section 19-4, a straight line section 19-5, and an expansion section.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the coiled tubing steel shot jet perforation device comprises a perforating liquid storage tank 1, a sand mixing pump 2, a steel shot storage tank 3, a screw conveyor 4, a fracturing pump 5, a liquid inlet valve body 6, a liquid discharging valve body 7, a cable car 8, an injector 9, a blowout preventer 10, a coiled tubing 11, a whipstock 12, an anchoring device 13, a cement ring 14, a casing 15, a connecting nipple 16, a centralizing device 17, a perforating device 18, a nozzle 19, a perforating hole 20, a packer 21, a positioning device 22 and a stratum 23. The perforating liquid storage tank 1 is cylindrical and can store perforating liquid, the perforating liquid in the perforating liquid storage tank 1 is conveyed to the sand mixing pump 2 through a pipeline, the steel grain storage tank 3 is of an upper hemispherical structure, a lower hemispherical structure and a middle cylindrical structure, steel grains can be stored, smooth falling of the steel grains can be realized, the steel grains are prevented from being deposited and blocked in the tank, a screw conveyor 4 is arranged at an outlet at the lower part of the steel grain storage tank 3, the screw conveyor 4 can convey the steel grains in the steel grain storage tank 3 to the sand mixing pump 2 through the spiral action of blades, the sand mixing pump 2 conveys the steel grains and the perforating liquid to the fracturing pump 5 through the pipeline after uniformly mixing the perforating liquid and the steel grains, three liquid inlet valve bodies 6 and three liquid outlet valve bodies 7 are arranged at the front end of the fracturing pump 5, the liquid inlet valve bodies 6 are arranged at the lower part of the fracturing pump 5, the liquid discharge valve body 7 is arranged at the upper part of the fracturing pump 5, a series of grooves with a certain distance are formed in the surface of the liquid inlet valve seat 6-3 in the liquid inlet valve body 6, when the liquid inlet valve seat 6-3 is contacted with the liquid inlet valve ball 6-2, if steel particles with large diameter and high density are blocked, steel balls are pressed into the grooves, high-pressure sealing of the liquid inlet valve body 6 is realized, after the liquid inlet valve seat 6-3 and the liquid inlet valve ball 6-2 are separated, the steel particles in the grooves can leave the grooves under the carrying of fluid, the fracturing pump 5 is connected with a cable car 8 through a pipeline, and a mixture of the steel balls and perforating liquid output by the fracturing pump 5 is conveyed to a continuous oil pipe 11 on the cable car 8 through the pipeline and sequentially passes through an injector 9 and a blowout preventer 10. The whipstock 12 is arranged at the lower part of the straight well section, the whipstock 12 is fixed in the casing 15 through the anchoring device 13 at the lower part, the whipstock 12 can guide the continuous oil pipe 11 to enter a designed track, the connecting nipple 16 is arranged at the tail part of the continuous oil pipe 11 to realize the connection of the continuous oil pipe 11 and the centralizing device 17, the centralizing device 17 can ensure the centralizing of the continuous oil pipe 11 and the perforating device 18, the continuous oil pipe 11 and the perforating device 18 can smoothly pass through a borehole, simultaneously ensure the smooth proceeding of the perforating operation, the perforating device 18 is arranged at the lower part of the centralizing device 17, the perforating device 18 can realize the change of the flowing direction of steel particles and fluid, the nozzle 19 is arranged on the surface of the perforating device 18, after the steel particles and the perforating liquid sequentially enter the connecting nipple 16, the centralizing device 17 and the perforating device 18, the perforating sleeve 15 and the cement ring 14 are ejected at a high speed through the nozzle 19 to form perforation holes 20 in the stratum, the quick penetration of the sleeve 15 and the cement sheath 14 is realized, the depth and the diameter of the perforation holes 20 are increased, a plurality of installing ports of the nozzles 19 are arranged on the perforating device 18, the installing number of the nozzles 19 can be selected, the installing ports of the rest nozzles 19 can be blocked by blind hole nozzles, the packer 21 is arranged at the lower part of the perforating device 18, the packing of fluid and pressure in the perforation holes can be realized, the positioning device 22 is arranged at the lower part of the packer 21, the perforation position and the direction can be positioned, the movement direction of the mixed liquid of steel particles and perforating liquid is that the mixed liquid of the steel particles and the perforating liquid is that after being mixed by the sand mixing pump 2, the mixed liquid enters the coiled tubing 11 on the cable car 8 after being pressurized by the fracturing pump 5, then reaches the underground connection short circuit 16 through the injector 9 and the blowout preventer 10, and then passes through the centering device 17 and the perforating device 18, and the impact sleeve 15 is ejected from the nozzles 19 at high speed, cement sheath 14 and formation 23.
As shown in FIG. 2, the liquid inlet valve body and the liquid outlet valve body comprise a liquid inlet valve spring 6-1, a liquid inlet valve ball 6-2, a liquid inlet valve seat 6-3, a liquid outlet valve spring 7-1, a liquid outlet valve ball 7-2 and a liquid outlet valve seat 7-3. The liquid inlet valve body 6 can realize the on-off control of liquid inlet of the fracturing pump 5, the liquid inlet valve spring 6-1 is arranged at the upper part of the liquid inlet valve body 6, the liquid inlet valve ball 6-2 at the lower part is controlled to reciprocate under the action of spring force, the liquid inlet valve seat 6-3 is arranged at the lower part of the liquid inlet valve ball 6-2, the sealing of liquid inlet fluid is realized through the matching of the contact spherical surfaces of the liquid inlet valve ball 6-2 and the liquid inlet valve seat 6-3, a series of grooves with certain intervals are arranged on the contact surface of the liquid inlet valve seat 6-3 and the liquid inlet valve seat 6-2, when the liquid inlet valve ball 6-2 is contacted with the liquid inlet valve seat 6-3, if large-diameter steel particles are blocked in the middle, the steel particles can enter the grooves on the surface of the liquid inlet valve seat 6-3 under the pressing action between the liquid inlet valve ball 6-2 and the liquid inlet valve seat 6-3, the sealing surfaces of the liquid inlet valve ball 6-2 and the liquid inlet valve seat 6-3 are tightly attached, and the high-pressure sealing of the liquid inlet valve body 6 is realized. The liquid discharge valve body 7 can realize the switch control of liquid discharge of the fracturing pump 5, the liquid discharge valve spring 7-1 is arranged at the upper part of the liquid discharge valve body 7, the lower liquid discharge valve ball 7-2 is controlled to reciprocate under the action of spring force to control the discharge of fluid, the liquid discharge valve seat 7-3 is arranged at the lower part of the liquid discharge valve ball 7-2, the sealing of liquid discharge fluid is realized through the cooperation of the contact spherical surfaces of the liquid discharge valve ball 7-2 and the liquid discharge valve seat 7-3, a series of grooves with certain distance are arranged on the contact surface of the liquid discharge valve seat 7-3 and the liquid discharge valve seat 7-2, when the liquid discharge valve ball 7-2 is contacted with the liquid discharge valve seat 7-3, if steel particles with large diameter are blocked in the middle, the steel particles can enter the grooves on the surface of the liquid discharge valve seat 7-3 under the action of mutual pressing of the liquid discharge valve ball 7-2 and the liquid discharge valve seat 7-3, the close fitting of the sealing surfaces of the liquid discharge valve ball 7-2 and the liquid discharge valve seat 7-3 is ensured, and the high-pressure sealing of the liquid discharge valve body 7 is realized.
As shown in FIG. 3, the nozzle structure comprises a nozzle body 19-1, an arc section 19-2, a cone angle section 19-3, a straight line section 19-4 and an expanding section 19-5. The nozzle 19 is arranged on the surface of the perforating device 18, is connected with the perforating device 18 by utilizing threads, and can adjust the jet direction of steel particles sprayed out of the nozzle 18 by changing the angle and the direction of a threaded hole of the perforating device 18, so as to realize the adjustment of the perforating direction, the nozzle body 19-1 is made of hard alloy, the flow path in the nozzle 19 comprises four parts, namely an arc section 19-2, a cone angle section 19-3, a straight line section 19-4 and an expansion section 19-5 from top to bottom in sequence, and the length ratio of the arc section 19-2, the cone angle section 19-3, the straight line section 19-4 and the expansion section 19-5 is 1:3:2:0.4, the cone angle of the cone angle section 19-3 is 30 degrees to 40 degrees, the inner diameter ratio of the length of the nozzle 19 to the inner diameter of the straight line section 19-4 is 4 to 6, the cone angle of the expansion section 19-5 is 100 degrees to 120 degrees, and the expansion section 19-5 can enable steel particles and fluid accelerated by the straight line section to be sprayed out of the nozzle 19 more smoothly, so that the flow field of the steel particle jet flow is optimized.
The invention relates to a continuous oil pipe steel shot jet perforation device, which comprises the following specific operation steps:
the first step: after the well bore is cleaned, connecting the well surface pipeline, and opening an oil pipe and a sleeve valve after the pressure test is qualified;
and a second step of: starting a cable car 8, conveying a connecting nipple 16, a centralizing device 17, a perforating device 18, a packer 21 and a positioning device 22 to the underground by using a continuous oil pipe 11, and positioning and depth correction;
and a third step of: starting a sand mixing pump 2, a fracturing pump 5 and opening a valve of a perforating fluid storage tank 1, wherein the perforating fluid enters a shaft after passing through the sand mixing pump 2 and the fracturing pump 5 until the perforating fluid is filled in the shaft;
fourth step: opening a valve of a steel particle storage tank 3, starting a screw conveyor 4, conveying perforating liquid and steel particles to a sand mixing pump 3, pressurizing by a fracturing pump 5, conveying the steel particles and the perforating liquid to a downhole perforating device 18 through a continuous oil pipe 11, and spraying the steel particles and the perforating liquid from a nozzle 19 to impact a sleeve 15, a cement ring 14 and a stratum 23 to complete a perforating process;
fifth step: and closing a valve of the steel grain storage tank 3, closing the screw conveyor 4, only injecting perforating liquid into the shaft, and closing the sand mixing pump 2 and the fracturing pump 5 after the remaining steel grains of the shaft are carried, closing the well and blowing out to finish construction operation.
Claims (4)
1. The utility model provides a coiled tubing steel shot jet perforation device, including perforating liquid storage tank (1), sand mixing pump (2), steel shot storage tank (3), screw conveyer (4), fracturing pump (5), feed liquor valve body (6), flowing back valve body (7), cable car (8), injector (9), preventer (10), coiled tubing (11), whipstock (12), anchor (13), cement ring (14), sleeve pipe (15), connect nipple joint (16), righting device (17), perforating device (18), nozzle (19), perforation hole (20), packer (21), positioner (22), stratum (23), its characterized in that: the perforating liquid storage tank (1) is cylindrical and can store perforating liquid, the perforating liquid in the perforating liquid storage tank (1) is conveyed to the fracturing pump (2) through a pipeline, the steel particle storage tank (3) is of an upper hemisphere, a lower hemisphere and a middle cylinder structure, steel particles can be stored, smooth falling of the steel particles can be achieved, steel particles are prevented from being deposited and blocked in a tank, a screw conveyor (4) is arranged at an outlet at the lower part of the steel particle storage tank (3), the screw conveyor (4) can convey the steel particles in the steel particle storage tank (3) to the sand mixing pump (2) through the spiral action of a blade, the sand mixing pump (2) uniformly mixes the perforating liquid with the steel particles, the steel particles and the perforating liquid are conveyed to the fracturing pump (5) through the pipeline, three liquid inlet valve bodies (6) and three liquid outlet valve bodies (7) are arranged at the front end of the fracturing pump (5), the liquid inlet valve bodies (6) are arranged at the lower part of the fracturing pump (5), the liquid outlet valve bodies (7) are arranged at the upper part of the fracturing pump (5), grooves are formed in the surfaces of the liquid inlet valve bodies (6-3), when the liquid inlet bodies (6-3) are in contact with the steel particles in the grooves, and the liquid inlet valve bodies (6-6) can be separated from the liquid inlet balls (6) through the grooves when the liquid inlet balls (6) and the liquid inlet balls are in the grooves, and the liquid inlet balls are sealed in the grooves are separated, and the liquid inlet valve bodies (6 are separated when the liquid inlet bodies are separated in the grooves and the liquid inlet valve bodies (6 grooves are arranged, when the next time the liquid inlet valve seat (6-3) is contacted with the liquid inlet valve ball (6-2) and steel particles are blocked, the steel particles can be continuously pressed into the grooves, the fracturing pump (5) is connected with the cable car (8) through a pipeline, a steel ball and perforating liquid mixture output by the fracturing pump (5) is conveyed to the continuous oil pipe (11) on the cable car (8) through the pipeline, the steel ball and perforating liquid mixture sequentially passes through the injector (9) and the blowout preventer (10), the whipstock (12) is arranged at the lower part of the straight well section, the whipstock (12) is fixed in the casing (15) through the anchoring device (13) at the lower part, the whipstock (12) can guide the continuous oil pipe (11) to enter a designed track, the connecting nipple (16) is arranged at the tail part of the continuous oil pipe (11) to realize the connection of the continuous oil pipe (11) and the centralizing device (17), the centralizing device (17) can ensure the continuous oil pipe (11) and the perforating device (18) to be centered, the continuous oil pipe (11) and the perforating device (18) can smoothly pass through the well hole in the well, simultaneously, the whipstock (18) is arranged at the lower part of the anchoring device (13) can be arranged to realize the smooth operation, the fluid flow direction of the perforating device (18) and the perforating particles can be sequentially changed after the steel particles enter the perforating device (18) and the perforating device (17), through the high-speed blowout of nozzle (19), shoot through sleeve pipe (15) and cement sheath (14), form perforation hole (20) in stratum inside, realize the quick penetration of sleeve pipe (15) and cement sheath (14), increase the degree of depth and the diameter of perforation hole (20), set up the installing port of a plurality of nozzles (19) on perforating device (18), the installation number of selectable nozzle (19), the installing port of remaining nozzle (19) can utilize blind hole nozzle to block up, packer (21) set up in perforating device (18) lower part, can realize packing up perforation inside fluid and pressure, positioner (22) are installed in packer (21) lower part, can fix a position perforation position and position, steel shot and perforation liquid mixed solution's direction of motion is, after the steel shot is mixed by sand pump (2), continuous oil pipe (11) on entering cable car (8) after pressing through fracturing pump (5), through injector (9) and blowout preventer (10), reach underground connection nipple (16), through righting device (17), device (18) in proper order, high-speed blowout of cement sheath pipe (15) and stratum (23) are impacted by nozzle (19).
2. The coiled tubing steel shot jet perforation device as set forth in claim 1, wherein: the liquid inlet valve body (6) and the liquid outlet valve body (7) comprise a liquid inlet valve spring (6-1), a liquid inlet valve ball (6-2), a liquid inlet valve seat (6-3), a liquid outlet valve spring (7-1), a liquid outlet valve ball (7-2) and a liquid outlet valve seat (7-3), the liquid inlet valve body (6) can realize the on-off control of liquid inlet of the fracturing pump (5), the liquid inlet valve spring (6-1) is arranged at the upper part of the liquid inlet valve body (6), the liquid inlet valve ball (6-2) is controlled to reciprocate under the action of spring elasticity, the inlet of fluid is controlled, the lower part of the liquid inlet valve ball (6-2) is provided with the liquid inlet valve seat (6-3), the liquid inlet valve seat (6-2) and the liquid inlet valve seat (6-3) are matched to realize the sealing of liquid inlet flow, the liquid outlet valve body (7) can realize the on-off control of the liquid outlet of the fracturing pump (5), the liquid outlet valve spring (7-1) is arranged at the upper part of the liquid outlet valve body (7), the liquid outlet valve ball (7-2) is controlled to reciprocate under the action of the spring elasticity, the liquid outlet valve ball (7-2) is controlled to contact the liquid outlet valve seat (7-3) with the liquid outlet valve seat (7-3), the surface of the contact surface of the liquid discharge valve seat (7-3) and the liquid discharge valve ball (7-2) is provided with a groove, when the liquid discharge valve ball (7-2) is in contact with the liquid discharge valve seat (7-3), if steel particles are blocked in the middle, the steel particles can enter the groove on the surface of the liquid discharge valve seat (7-3) under the action of mutual pressing of the liquid discharge valve ball (7-2) and the liquid discharge valve seat (7-3), so that the close contact of the sealing surfaces of the liquid discharge valve ball (7-2) and the liquid discharge valve seat (7-3) is ensured, and the high-pressure sealing of the liquid discharge valve body (7) is realized.
3. The coiled tubing steel shot jet perforation device as set forth in claim 1, wherein: the nozzle (19) comprises a nozzle body (19-1), an arc section (19-2), a cone angle section (19-3), a straight line section (19-4) and an expansion section (19-5), wherein the nozzle (19) is arranged on the surface of a perforating device (18), the nozzle is connected with the perforating device (18) through threads, the jet direction of steel particles sprayed out of the nozzle (19) can be adjusted by changing the angle and the direction of a threaded hole of the perforating device (18), and then the adjustment of the perforation direction is realized, the nozzle body (19-1) is made of hard alloy, the inner flow path of the nozzle (19) comprises four parts, the arc section (19-2), the cone angle section (19-3), the straight line section (19-4) and the expansion section (19-5) are sequentially arranged from top to bottom, and the length ratio of the arc section (19-2), the cone angle section (19-3), the straight line section (19-4) and the expansion section (19-5) is 1:3:2:0.4, the cone angle of the cone angle section (19-3) is 30 degrees to 40 degrees, the inner diameter ratio of the length of the nozzle (19) to the inner diameter of the straight line section (19-4) is 4 to 6, the cone angle of the expansion section (19-5) is 100 degrees to 120 degrees, and the expansion section (19-5) can enable steel particles and fluid accelerated by the straight line section to be ejected from the nozzle (19) more smoothly, so that the flow field of steel particle jet flow is optimized.
4. A coiled tubing steel shot jet perforation device as claimed in any one of claims 1 to 3, comprising the following specific steps:
the first step: after the well bore is cleaned, connecting the well surface pipeline, and opening an oil pipe and a sleeve valve after the pressure test is qualified;
and a second step of: starting a cable car (8), conveying a connecting nipple (16), a centralizing device (17), a perforating device (18), a packer (21) and a positioning device (22) to the underground by using a continuous oil pipe (11), and positioning and depth correction;
and a third step of: starting a sand mixing pump (2) and a fracturing pump (5), opening a valve of a perforating fluid storage tank (1), and enabling perforating fluid to enter a shaft after passing through the sand mixing pump (2) and the fracturing pump (5) until the perforating fluid is filled in the shaft;
fourth step: opening a valve of a steel particle storage tank (3), starting a screw conveyor (4), conveying perforating liquid and steel particles to a sand mixing pump (2), pressurizing by a fracturing pump (5), conveying the steel particles and the perforating liquid to a downhole perforating device (18) through a continuous oil pipe (11), and spraying the steel particles and the perforating liquid from a nozzle (19) to impact a sleeve (15), a cement ring (14) and a stratum (23) to complete a perforating process;
fifth step: and closing a valve of the steel grain storage tank (3), closing the screw conveyor (4), only injecting perforating liquid into the shaft, and closing the sand mixing pump (2) and the fracturing pump (5) after the remaining steel grains of the shaft are carried, and spraying Guan Jingfang to finish construction operation.
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| CN109281628B (en) * | 2018-10-09 | 2020-10-23 | 中国石油大学(华东) | Abrasive particle jet flow blockage removal and yield increase device for continuous oil pipe |
| CN110181407B (en) * | 2019-05-30 | 2020-10-27 | 重庆大学 | Abrasive jet system for cutting down-hole casing and use method thereof |
| CN110847889A (en) * | 2019-11-20 | 2020-02-28 | 河南工程学院 | Hydraulic fracturing test system and test method |
| CN111649967A (en) * | 2020-04-26 | 2020-09-11 | 四川宏华石油设备有限公司 | High-power electric fracturing equipment test system |
| CN112963127B (en) * | 2021-02-02 | 2023-04-07 | 中国石油天然气股份有限公司 | Oil pipe diverter |
| CN112943151B (en) * | 2021-04-21 | 2022-12-09 | 新疆中能西域石油技术有限公司 | Oil field downhole packer |
| CN114427367B (en) * | 2022-01-14 | 2023-06-23 | 中国石油大学(华东) | High-pressure abrasive jet cutting system and method in abandoned shaft of offshore oil production platform |
| CN117365396A (en) * | 2023-12-05 | 2024-01-09 | 大庆金祥寓科技有限公司 | Cable type precise old well secondary perforation process and new well secondary perforation process |
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