CN1818328A - Fracturing four-in-one technology - Google Patents
Fracturing four-in-one technology Download PDFInfo
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- CN1818328A CN1818328A CNA2006100654330A CN200610065433A CN1818328A CN 1818328 A CN1818328 A CN 1818328A CN A2006100654330 A CNA2006100654330 A CN A2006100654330A CN 200610065433 A CN200610065433 A CN 200610065433A CN 1818328 A CN1818328 A CN 1818328A
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- 238000005336 cracking Methods 0.000 claims description 27
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
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Abstract
The process method can complete four procedures of perforation, test, fracturing and liquid discharge of a jet pump by adopting one-trip underground pipe column. The fracturing four-combined technology is characterized in that: connecting the pipe column and sending to the well, positioning perforation, throwing test core to ask for production and washing the well, closing the well to measure pressure, fishing test core, testing pressure, adding sand and fracturing, open-flow, pump discharging to ask for production, washing out pump core, washing and killing the well, pulling out the pipe column, and finishing the construction. The effect is as follows: the technology can complete four procedures of perforation, test, sand fracturing and liquid drainage of the jet pump in one string, mainly solves the problem of quick flowback after fracturing, can realize uninterrupted liquid drainage, improves the working efficiency and avoids oil layer pollution.
Description
Technical field
The present invention relates to petroleum exploration and development formation testing field of engineering technology, down-hole string of particularly a kind of employing is finished the process of perforation, test, pressure break, four operations of pump liquid.
Background technology
At present, in petroleum exploration and development, fracturing is one of the routine of transforming the oil-gas Layer measure, effective method.Generally speaking, the original production capacity that layer is implemented in fracturing is lower, presses the back to rely on the less of the continuous blowing of self-energy.Most of well must wait the discharge opeing work of finishing by vaporize water discharge opeing, liquid nitrogen discharge opeing after pressure break.Pressure break and discharge opeing operation are carried out respectively.Not only drain time is long, expense is high for these conventional fluid-discharge methods, and since when construction the pump pressure height, make pit shaft liquid be pressed into the stratum easily, the stratum is damaged.Descend the jet pump tubing string again if trip out fracturing string after the pressure break, the minimum need with 24 hours.In this time of 24 hours, undischarged pressure break raffinate produces precipitation in the stratum, bigger pollution is caused on the stratum.Engineers and technicians have studied a kind of on fracturing string, have jet pump and packer.As the Chinese patent publication number be: CN1556304A, name is called: formation acidizing or pressure break and jet pump connection are made the fluid-discharge technology system.After the combination acidifying of this fracturing string or pressure break are finished, can finish discharge opeing, can also carry pressure gauge and sampler from input jet pump pump core in oil pipe or the drilling rod.Benefit is: finish discharge opeing work continuously and fast.Quick fluid-discharge has improved operating efficiency continuously, avoided oil layer pollution, and High Voltage pumping function has good de-plugging effect to the stratum.In addition, the Chinese patent publication number is: CN1458388A, name is called: perforation and formation testing and jet pump three are made the fluid-discharge technology system.This perforation, formation testing and jet pump three are made technology, have improved operating efficiency, avoid the stratum secondary pollution.
Present down-hole construction technology only can be accomplished pressure break and jet pump discharge opeing bigeminy work, perhaps only can finish test, pressure break, jet pump discharge opeing three works.For a long time, engineers and technicians wish and imagine a down-hole string and can finish perforation, test, sand fracturing, four operations of jet pump discharge opeing.But,,, fail real realization so the down-hole string that engineers and technicians wish is for a long time finished perforation, test, sand fracturing, four operations of jet pump discharge opeing because the pressure break that carries a gun passes sand when having pressure break and hang contradictory problems between the rifle body.Like this, carry a gun pressure break also once by some in the industry the scholar assert it is impossible realize.
Summary of the invention
The objective of the invention is to: a kind of cracking four-linking technology is provided, adopts one time down-hole string, finish perforation, test, sand fracturing and four operations of jet pump discharge opeing.The continuous quick fluid-discharge of energy is increased work efficiency after the pressure break, avoids oil layer pollution.Improve the oil gas production capacity, real embodiment goes out the original looks of stratum production capacity.Another purpose is that design is hung air deflector and lost gun apparatus, pass the contradictory problems between sand and the suspension rifle body when solving pressure break, it is little to overcome the tubing string internal diameter, and the tubing string bottom connects perforating gun, be not suitable for the deficiency of the sand fracturing construction of particle, solve the pressure break problem that carries a gun.Realize perforation, test, sand fracturing and the jet pump discharge opeing tetrad work of engineers and technicians' serious hope for a long time.
The present invention is achieved in that
Cracking four-linking skill process is:
A, at first adopt vaporize water or gaslift mode to form negative pressure state, reduce the pit shaft level, be generally 1/2～2/3 of formation testing layer depth.
B, connected cracking four-linking skill tubing string in order on ground, be delivered in the well with the pressure break oil pipe.
C, survey gamma and put the magnetic curve, carry out the perforation prelocalization, make perforating gun aim at perforation layer, allowable error ± 20cm.
D, adjustment well head tubing nipple are installed production tree, drop into perforation rod rum point duration and degree of heating from well head, ignite perforating gun.
E, throw and to be with manometric test fuse, descend well testing manometer monitoring perforation then after, liquid level rises in the well, pressure gauge trips out pressure gauge stop 4-8 hour in well after, reads output, and the observation oil.
F, lay down production tree, the upper lifting pipe post is finished the pressure break degree of depth, base sealed packer, and water flushing is implemented the profit amount, and gets each three of oil gas water samples.
G, shut-in pressure survey power recover, and measure formation parameter, under go on foot pressing crack construction data be provided.
H, pull the test fuse out, throw the hydraulic test pump core, packer is sealed pressure testing, pressure testing is in 20MPa.
I, clear water wash out the hydraulic test pump core, throw steel ball from well head, treat that steel ball falls into the ball seat of the stop collar endoporus upper end of losing gun apparatus after, well head is sprained and is pressed 20MPa, pressure to reduce to lose the rifle success.
J, carry out sand fracturing construction by the requirement of sand fracturing working design.
Open flow after K, the pressure testing is thrown test fuse and pump core after the stop-spraying, pump row asks product.Pump applies worker order: face-pumping current drainage journey pressure testing 25-30MPa primarily, and the ground piston pump is started working and is promptly squeezed into power fluid from oil pipe, and the oil jacket annular space flows out the mixed liquor that carries stratum liquid, obtains profit output behind the ground tanks separate measurement;
L, wash out the pump core, wash kill-job, unload production tree dress blowout preventer, trip out in the well cracking four and make tubing string, finish construction.
In order to contrast measure effect, strata pressure of pressure break before measurement recovers, and pump row finishes to survey a strata pressure recovery again after the pressure break.
For realizing the cracking four-linking skill, the cracking four of being taked is made the tubing string syndeton, is from bottom to top: pressure relief device, the body of a gun, igniter head, lose gun apparatus and hang air deflector, the diameter of axle to damper, packer, dropping in and taking off type testing arrangement, holder rubber bowl, jet pump, orientation spool and oil pipe.
In cracking four-linking skill process, connect tubing string, base sealed packer, packer pressure test, add sand fracturing, anti-flushing well, perforation prelocalization and perforation work, under these professional those skilled in the art instructed, operating worker can be finished construction.
The structure that hangs air deflector is: top connection has lower external thread, upper internal threaded and lower internal thread are arranged in the top connection, on the top connection lower external thread, be connected with shielding cylinder, the shielding cylinder external diameter is the 95-120 millimeter, length 280-350 millimeter, be connected with the suspension sand-guiding tube on the top connection lower internal thread, the internal diameter that hangs sand-guiding tube is the 54-76 millimeter, length is the 280-340 millimeter, lead sand hole on the wall of suspension sand-guiding tube, hanging the sand-guiding tube lower end has external screw thread, and the annular that forms the 20-30 millimeter between shielding cylinder and suspension sand-guiding tube is led the sand passage.
Hang the strip that is shaped as of leading sand hole on the sand-guiding tube wall, length is the 150-180 millimeter, and width is the 12-16 millimeter, and quantity is 2-4.
The effect that hangs air deflector is: when the fracturing fluid of high-voltage high-speed enters mozzle, at first enter and lead the sand passage between sand-guiding tube and the shielding cylinder by leading sand hole, enter annular space then downwards, arrive the pressure break stratum.Shielding cylinder has played and has stopped that powerful high pressure fracturing fluid impacts, and sleeve pipe is not damaged around the protection, ensures the unexpected effect that the pressure break that carries a gun can realize.
The structure of losing gun apparatus is: stop collar is arranged in the shell, be slidingly matched between stop collar and the shell, between stop collar and the shell sealing ring is arranged, be connected by shear pin between stop collar and the shell, stop collar endoporus upper end is the conical surface, and the conical surface can cooperate with steel ball and seal, and between stop collar and shell claw is arranged, claw connects lower contact, and claw and lower contact also can be as a whole.Lower contact and outer casing underpart endoporus are slidingly matched, and the face of being slidingly matched has sealing ring, and outer casing underpart has stop pin, stop pin fixed housing and lower contact, and external screw thread is arranged at the lower contact bottom, can connect perforating gun.
The pressure of cutting off of shear pin is 15-20MPa, and the quantity of shear pin is at 3-6, and the quantity of stop pin is 2-4.
Lose the gun apparatus bottom and connect perforating gun.After perforating gun is finished perforation, drop into steel ball from well head, steel ball is fallen after the scalene cone of stop collar top, cuts off shear pin from the well head pressurization, and the pressure of cutting off of shear pin is 15-20MPa.The quantity of shear pin is at 3-6.Pressure promotes stop collar and moves downward, and promotes the claw in the lower contact.Be connected the perforating gun string of losing the gun apparatus bottom and under gravity and pressure promotion, be discharged into the shaft bottom.Internal diameter is little before discharging perforating gun, and internal diameter increases behind the release perforating gun, just might be able to realize sand fracturing and every wire rope operation behind the release perforating gun.Produced the unexpected effect of the pressing crack construction safety of guaranteeing to carry a gun.
Can carry out sand fracturing and every wire rope operation after discharging perforating gun; Various perforation modes all can be used; Be not subjected to the perforation time restriction.
Beneficial effect of the present invention:
Pressure break combination operation process technology has overcome pressing crack construction in the past and has caused the pressure break raffinate to precipitate in the stratum owing to the row of returning after pressing is untimely to stop up the duct, form a kind of new formation contaminant, the deficiency of reduction fracturing effect.The pressure break connection is made technology and can be realized uninterrupted discharge opeing, about 24 hours, improves and presses the back discharge speed more than 50%.This technology has dropped on probation respectively at three mouthfuls of wells, all succeed, and saves more than 160.0 ten thousand yuan of engineering costs.G90X1 well wherein, output is brought up to 12.0 tons of day produce oils for 1.58 tons by the day produce oil before pressing, and increases more than 100 ten thousand tons of prediction oils in place.In addition, be 0 through the data interpretation skin factor, illustrate that the stratum is not polluted.This new technology can also be finished perforation, test, sand fracturing, four operations of jet pump discharge opeing simultaneously in one-trip string.In addition, it is little to have overcome in original technology the tubing string internal diameter, and the tubing string bottom is connecting perforating gun, is not suitable for the deficiency of the sand fracturing construction of particle.And also can carry out the construction of no solids treatment liquid such as acidifying.
The present invention is in formation testing, fracturing work, and construction technology and tubular column structure design have bigger improvement, and it is little to have solved the operating tool string internal diameter, and the fracturing string bottom is not suitable for connecting perforating gun, the contradiction between pressing crack construction tubing string and the perforating gun.Solved the pressure break difficult problem that carries a gun, realized that perforation, test, sand fracturing and jet pump discharge opeing tetrad that engineers and technicians for a long time thirst for realizing do; Having broken the pressure break that carries a gun that some insider did is the wrong judgement that impossible realize.Make it have more practicality, meet the needs of oil underground fracture operation fully and produced handy and practical effect.It is a new and innovative, progressive, practical new design.
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
Description of drawings
Accompanying drawing 1 is made tubing string syndeton schematic diagram for cracking four of the present invention.The cracking four that is embodiment is made the tubular column structure schematic diagram.
Accompanying drawing 2 is made suspension air deflector (5) structural representation of tubing string for cracking four of the present invention.It is suspension air deflector (5) structural representation of embodiment.
Accompanying drawing 3 is lost gun apparatus (4) structural representation for what cracking four of the present invention was made tubing string.Be embodiment lose gun apparatus (4) structural representation.
Among the figure, 1. pressure relief device, 2. perforating gun, 3. igniter head is 4. lost gun apparatus, 5. suspension air deflector, 6. the diameter of axle is to damper, 7.P-T packer, 8. dropping in and taking off type testing arrangement, 9. holder rubber bowl, 10. jet pump, 11. orientation spools, 12. oil pipes, 13. top connections, 14. shielding cylinders, 15. the suspension sand-guiding tube, 16. lead sand hole, and 17. lead the sand passage, 18. shells, 19. steel ball, 20. stop collars, 21. shear pins, 22. sealing rings, 23. claw, 24. sealing rings, 25. stop pins, 26. lower contacts.
The specific embodiment
Embodiment: pound sign: G88 well construction date: 20 days-November 5 October in 2005
Annotate grey seal in 17 to 19 October in 2005, visit 3040.53 meters of the red dog degree of depth, 2000 meters of vaporize water negative pressure.Following cracking four was made tubing string on 20th, caber perforation on the 21st, downforce instrumentation build-up of fluid, 14.29 tons of folding day produce oils, on carry tubing set packer, finish well-flushing, test, pump row and fracturing string, wherein under the jet pump dark 2901.18 meters, under the testing arrangement dark 2902.63 meters, under the packer dark 2903.8 meters, hang under the air deflector dark 2955.8 meters.October 22, well-flushing was fuel-displaced 7.3 cubic metres.
On October 23rd, 2005 is qualified to packer pressure test 20MPa, product is asked in the jet pump discharge opeing, pump pressure 20MPa day produce oil 11.31, complex acid on the 26th and fracturing fluid, 14:30-18:50 carried out acidifying and pressing crack construction on 27, with 60 cubic metres of 20% hydrochloric acid, and pump pressure 47MPa during construction, discharge capacity 3.0 cubic meters per minute, acid back open flow and anti-flushing well.249.8 cubic metres of pressure break fluid volumes, pump pressure 45MPa, 21 cubic metres of back-up sands, discharge capacity 42 cubic meters per minute are pressed back open flow, well-flushing.Product is asked in the jet pump discharge opeing, and pump drains into 31 end of day, and fuel-displaced 49.84 cubic metres of accumulative total is discharged 68 cubic metres of pressure break raffinates, 27.8 cubic metres of pump pressure 25MPa day produce oils.Well head pressurization in 1 to 3 November 5MPa shut-in pressure survey power is recovered, and finishes this layer formation testing work.
G88 well cracking four-linking skill process:
1, October 20: at first adopting vaporize water or gaslift mode to form negative pressure state, reduce the pit shaft level, is 2/3 of formation testing layer depth.
2, October 21: connected cracking four-linking skill tubing string on ground in order.
Consult accompanying drawing 3.Be from bottom to top: 102 millimeters of pressure relief device (1) external diameters, 72 millimeters of internal diameters, 3000 millimeters of length are down to 3018.8 meters of well depths.89 millimeters of perforating gun (2) external diameters, bullet type 89 bullets are down to well depth 3005.7-3015.8 rice.93 millimeters of igniter head (3) external diameters, 24 millimeters millimeters of internal diameter, 600 millimeters of length are down to 3004.76 meters of well depths.Lose gun apparatus (4) and hang 112 millimeters of air deflector (5) external diameters, 54 millimeters of internal diameters, 550 millimeters of length are down to 3006.99 meters of well depths.The diameter of axle is respectively 102 millimeters of external diameters, 127 millimeters to damper (6); 48 millimeters, 40 millimeters of internal diameters, 1165 millimeters, 494 millimeters of length are down to 2955.72 meters of well depths.118 millimeters of P-T packer (7) external diameters, 45 millimeters of internal diameters, 1200 millimeters of length are down to 2951.37 meters of well depths.110 millimeters of dropping in and taking off type testing arrangement (8) external diameters, 56 millimeters of internal diameters, 900 millimeters of length are down to 2950.82 meters of well depths.128 millimeters of holder rubber bowl (9) external diameters, 55 millimeters of internal diameters, 560 millimeters of length are down to 2950.12 meters of well depths.110 millimeters of sliding sleeve jet pump (10) external diameters, 64 millimeters of internal diameters, 1120 millimeters of length are down to well depth 2949.37m.89 millimeters of orientation spool (11) external diameters, 76 millimeters of internal diameters, 1500 millimeters of length are down to 2909.0 meters of well depths.89 millimeters of oil pipe (12) external diameters, 76 millimeters of internal diameters.All adopt and be threaded.Be delivered in the well with oil pipe (12).
3, October 22: survey gamma and put the magnetic curve, carry out the perforation prelocalization, make perforating gun (2) aim at the perforation layer, error+10 centimetre.
4, October 22: adjust the well head tubing nipple, production tree is installed, drop into perforation rod rum point duration and degree of heating (3), ignite perforating gun (2) from well head.
5, October 22: throw and to be with manometric test fuse, descend well testing manometer monitoring perforation then after, liquid level rises in the well, pressure gauge trips out pressure gauge stop 6 hours in well after, reads output, and the observation oil.
6, October 23: lay down production tree, the upper lifting pipe post is finished the pressure break degree of depth, seat envelope P-T packer (7), and water flushing is implemented the profit amount, and gets each three of oil gas water samples.
7,23-25 day in October: product is asked in the jet pump discharge opeing.
8, October 25: pull the test fuse out, throw the hydraulic test pump core, P-T packer (7) is sealed pressure testing 20MPa.
9, October 26: carry out the sand fracturing construction by the requirement of sand fracturing working design.
10,27-31 day in October: open flow after the pressure testing, throw test fuse and pump core after the stop-spraying, pump row asks products (ground flow pressure testing 25MPa, rely on the ground piston pump to advance from oil pipe that annular space goes out circulation power liquid, the ground tanks metering asks product to obtain the profit amount).
11,1-4 day in November: shut-in pressure survey power is recovered, well head pressurization 5MPa.
12, November 5: wash out the pump core, wash kill-job, unload production tree dress blowout preventer, trip out the interior cracking four of well and make tubing string, finish construction.
Hang air deflector (5) embodiment: consult accompanying drawing 2.The structure that hangs air deflector (5) is: top connection (13) has lower external thread, top connection has upper internal threaded and lower internal thread in (13), on top connection (13) lower external thread, be connected with shielding cylinder (14), 112 millimeters of shielding cylinder (14) external diameters, 325 millimeters of length, be connected with on top connection (13) lower internal thread and hang sand-guiding tube (15), the internal diameter that hangs sand-guiding tube (15) is 63 millimeters, length is 310 millimeters, lead sand hole (16) on the wall of suspension sand-guiding tube (15), hanging sand-guiding tube (15) lower end has external screw thread, and the annular that forms 26 millimeters between shielding cylinder (14) and suspension sand-guiding tube (15) is led sand passage (17).Hang the strip that is shaped as of leading sand hole (16) on sand-guiding tube (15) wall, length is 168 millimeters, and width is 14 millimeters, and quantity is 3.
Lose gun apparatus (4) embodiment: consult accompanying drawing 3.The structure of losing gun apparatus (4) is: 93 millimeters of shell (18) external diameters, in stop collar (20) is arranged, be slidingly matched between stop collar (20) and the shell (18).Between stop collar (20) and the shell (18) sealing ring (22) is arranged.Be connected by shear pin (21) between stop collar (20) and the shell (18), the quantity of shear pin (21) is at 3, and the pressure of always cutting off of shear pin (21) is 15-20MPa.Stop collar (20) endoporus upper end is the conical surface, and the conical surface can cooperate with steel ball (19) and seal when pitching built the pressure.Steel ball (19) diameter is 41.3 millimeters.Between stop collar (20) and shell (18) claw (23) is arranged, lower contact (26) is as a whole with claw (23).Lower contact (26) is slidingly matched with shell (18) bottom endoporus, and the face of being slidingly matched has sealing ring (24), and 2 stop pins (25) are arranged at shell (18) bottom.Stop pin (25) fixed housing (18) and lower contact (26), external screw thread is arranged at lower contact (26) bottom.Lose the withstand voltage 70MPa of being of gun apparatus (4).The latus rectum that release is lost before the rifle is 38 millimeters; The latus rectum that release is lost behind the rifle is 60 millimeters.Lose stimulating the menstrual flow behind the rifle and be 2.49 times that lose before the rifle, can ensure pressure break safety.
Claims (8)
1, a kind of cracking four-linking technology is characterized in that:
A, at first adopt vaporize water or gaslift mode to form negative pressure state, reduce the pit shaft level, be generally 1/2～2/3 of formation testing layer depth;
B, connected cracking four-linking skill tubing string in order on ground, be delivered in the well with pressure break oil pipe (11);
C, survey gamma and put the magnetic curve, carry out the perforation prelocalization, make perforating gun (2) aim at perforation layer, allowable error ± 20cm;
D, adjustment well head tap are installed production tree, drop into perforation rod rum point duration and degree of heating (3) from well head, ignite perforating gun (2);
E, throw and to be with manometric test fuse, descend well testing manometer monitoring perforation then after, liquid level rises in the well, pressure gauge stops 4-8 hour in well after, trips out and is with manometric test fuse, reads output, and the observation oil;
F, lay down production tree, the upper lifting pipe post is finished the pressure break degree of depth, base sealed packer (7), and water flushing is implemented the profit amount, and gets each three of oil gas water samples;
G, shut-in pressure survey power recover, and measure formation parameter, under go on foot pressing crack construction data be provided;
H, throwing hydraulic test pump core seal pressure testing to packer (7), and pressure testing is in 20MPa;
I, clear water wash out the hydraulic test pump core, throw steel ball (19) from well head, treat that steel ball (19) falls into the ball seat of stop collar (20) the endoporus upper end of losing gun apparatus (4) after, well head is sprained and is pressed 20MPa, pressure to reduce to lose the rifle success;
J, carry out sand fracturing construction by the requirement of sand fracturing working design;
Open flow after K, the pressure testing is thrown test fuse and pump core after the stop-spraying, product is asked in jet pump (10) discharge opeing.Pump applies worker order: face-pumping current drainage journey pressure testing 25-30MPa primarily, and the ground piston pump is started working and is promptly squeezed into power fluid from oil pipe (12), and the oil jacket annular space flows out the mixed liquor that carries stratum liquid, obtains profit output behind the ground tanks separate measurement;
L, wash out the pump core, wash kill-job, unload production tree dress blowout preventer, trip out in the well cracking four and make tubing string, finish construction;
Cracking four is made the tubing string syndeton, is from bottom to top: pressure relief device (1), perforating gun (2), igniter head (3), lose gun apparatus (4), hang air deflector (5), the diameter of axle is to damper (6), packer (7), dropping in and taking off type testing arrangement (8), holder rubber bowl (9), jet pump (10), orientation spool (11) and oil pipe (12).
2, cracking four-linking technology according to claim 1 is characterized in that: strata pressure of pressure break before measurement recovers, and pump row finishes to survey a strata pressure recovery again after the pressure break.
3, cracking four-linking technology according to claim 1, it is characterized in that: the structure of employed suspension air deflector (5) is: top connection (13) has lower external thread, top connection has upper internal threaded and lower internal thread in (13), on top connection (13) lower external thread, be connected with shielding cylinder (14), shielding cylinder (14) external diameter is the 95-120 millimeter, length 280-350 millimeter, be connected with on top connection (13) lower internal thread and hang sand-guiding tube (15), the internal diameter that hangs sand-guiding tube (15) is the 54-76 millimeter, length is the 280-340 millimeter, lead sand hole (16) on the wall of suspension sand-guiding tube (15), hanging sand-guiding tube (15) lower end has external screw thread, and the annular that forms the 20-30 millimeter between shielding cylinder (14) and suspension sand-guiding tube (15) is led sand passage (17).
4, cracking four-linking technology according to claim 3 is characterized in that: hang the strip that is shaped as of leading sand hole (16) on sand-guiding tube (15) wall, length is the 150-180 millimeter, and width is the 12-16 millimeter, and quantity is 2-4.
5, according to claim 1,2,3 or 4 described cracking four-linking technologies, it is characterized in that: employed structure of losing gun apparatus (4) is: stop collar (20) is arranged in the shell (18), be slidingly matched between stop collar (20) and the shell (18), between stop collar (20) and the shell (18) sealing ring (22) is arranged, be connected by shear pin (21) between stop collar (20) and the shell (18), stop collar (20) endoporus upper end is the conical surface, the conical surface can cooperate with ball (19) and seal, between stop collar (20) and shell (18), claw (23) is arranged, claw (23) connects lower contact (26), lower contact (26) is slidingly matched with shell (18) bottom endoporus, the face of being slidingly matched has sealing ring (24), stop pin (25) is arranged at shell (18) bottom, stop pin (25) fixed housing (18) and lower contact (26), external screw thread is arranged at lower contact (26) bottom.
6, cracking four-linking technology according to claim 5 is characterized in that: the pressure of cutting off of losing the shear pin (21) of gun apparatus (4) is 15-20MPa, and the quantity of shear pin (21) is at 3-6, and the quantity of stop pin (25) is 2-4.
7, cracking four-linking technology according to claim 5 is characterized in that: the lower contact (26) of losing gun apparatus (4) is as a whole with claw (23).
8, according to claim 1,2,3 or 4 described cracking four-linking technologies, it is characterized in that: jet pump (10) adopts sliding sleeve jet pump (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100654330A CN100395428C (en) | 2006-03-24 | 2006-03-24 | Fracturing four-linkage method |
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| CN101761323A (en) * | 2009-12-29 | 2010-06-30 | 中国石油天然气集团公司 | Alliance method of oil well perforation, fracturing and snubbing transferring pumping |
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| CN102518426A (en) * | 2011-12-31 | 2012-06-27 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Hydrofracture bottom-hole pressure monitoring process |
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