CN201802376U - Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string - Google Patents
Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string Download PDFInfo
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- CN201802376U CN201802376U CN2010205203480U CN201020520348U CN201802376U CN 201802376 U CN201802376 U CN 201802376U CN 2010205203480 U CN2010205203480 U CN 2010205203480U CN 201020520348 U CN201020520348 U CN 201020520348U CN 201802376 U CN201802376 U CN 201802376U
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- ejector
- packer
- well
- staged fracturing
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- 280000858576 Barefoot companies 0.000 title claims abstract description 17
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- 238000005488 sandblasting Methods 0.000 claims description 12
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- 238000010276 construction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002585 bases Substances 0.000 abstract 1
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- 230000000704 physical effects Effects 0.000 abstract 1
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- ZRALSGWEFCBTJO-UHFFFAOYSA-N guanidine Chemical compound 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NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 235000009808 lpulo Nutrition 0.000 description 1
- 239000011159 matrix materials Substances 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001885 silicon dioxide Inorganic materials 0.000 description 1
- 239000000243 solutions Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Abstract
Description
Technical field
The utility model relates to oil field underground fracture technical field of construction, and particularly staged fracturing construction behind the gas water horizontal well barefoot completion is a kind of down-hole process pipe string of horizontal segment staged fracturing, can finish the fracturing reform on seven sections stratum at most.
Background technology
At present, foreign level gas well fracturing technology is fairly perfect, has formed technology such as open hole packer completion, casing cementing waterpower bridging plug, self-expanding packer and hydraulic sand blasting staged fracturing.Domestic horizontal gas well fracturing transformation enters the field trial stage, and on the basis of test, the research and development of open hole packer completion staged fracturing kit have been carried out in oil fields such as Sichuan, grand celebration, are primarily aimed at 8 simultaneously 1/ 2" horizontal hole has been carried out the supporting research tackling key problem of open hole packer completion staged fracturing, and packer pressure-bearing laboratory test technical indicator is 50MPa.Long celebrating oil field gas well research and develop in earlier stage 4 1/ 2" sleeve pipe is not cemented the well or sieve tube completion fixed tubular column hydraulic sand blasting fracturing technique; only can realize three sections formation breakdowns; be difficult to satisfy gas water horizontal well 6 " well barefoot completion, multistage pressure break demand more than 4 sections, simultaneously for the big well of long horizontal segment physical difference, the packing validity of staged fracturing is poor.
The utility model content
The purpose of this utility model is: a kind of barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubing string is provided, adopting classification ejector and K344 packer is that main process pipe string satisfies gas water horizontal well 6 and " is lowered to fixed tubular column behind the well barefoot completion, finishes staged fracturing.
The technical solution adopted in the utility model is: barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubing string, and mainly by well head big four 1,3 1/ 2" external upset tubing 2, hydraulic anchor 3, safety joint 4, ejector 5, K344 packer 6, ball seat 7 and float shoe 8 are formed, and are fixed with well head big four 1 at the horizontal well well head, are connected with oil pipe in the lower end of well head big four 1, and it is characterized in that: described oil pipe is 3 1/ 2" external upset tubing is 3 1/ 2" be connected with hydraulic anchor 3 on the tubing string that external upset tubing 2 is formed, the bottom of hydraulic anchor 3 is connected with safety joint 4, and hydraulic anchor 3 and safety joint 4 are in the diameter segment of horizontal well; On the tubing string of net horizontal section, be connected with the 7th grade of ejector 5, K344 packer 6, sleeve base, the 6th grade of ejector 5, K344 packer 6, sleeve base, level V ejector 5, K344 packer 6, sleeve base, fourth stage ejector 5, K344 packer 6, sleeve base, third level ejector 5, K344 packer 6, sleeve base, second level ejector 5, K344 packer 6, sleeve base and first order ejector 5 from top to bottom in turn, be connected with ball seat 7 in the lower end of first order ejector 5, the lower end of ball seat 7 connects a float shoe 8.
Ejector 5, K344 packer 6 have factory to produce and sale are arranged.
The use of summary barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubing string.Consult Fig. 1.
(1) Flushing tubular column well-flushing under in the sleeve pipe, and for mud.Requirement is returned out the flushing fluid content of impurities less than 0.2%.
(2) drift size gauge tool passes to the net horizontal section bottom, trips out the drifting drilling tool.
(3) 6 " the barefoot completion hydraulic sand blasting fixed tubular column staged fracturing technology tube pillars of well under.
(4) finish for horizontal segment mud, well-flushing after, the upper lifting pipe post is to the staged fracturing position.
Unload preventer, adorn big latus rectum fracture well head.
(5) jetting staged fracturing construction:
A, first section perforation, pressure break:
At first carry out first section hydraulic perforation: inject guanidine matrix liquid in the oil pipe, adopt 20～40 order quartz sands to make proppant, load fluid density is at 120～160kg/m 3Between, when load fluid during, improving the discharge capacity abrasive perforating apart from the nozzle 250m left and right sides, operational discharge capacity and well head pressure draw with reference to the jetting calculation method of parameters.During perforation, load fluid injects from oil pipe, and warp is hydraulic ejector 5 down, is returned out by the oil jacket annular space.
Next carries out first section jetting pressure break: after perforation is finished, discharge capacity is fallen, close well head big four 1 cover and put the gate kill-job, after pressing off the stratum, the maximum pump speed that is allowed according to design annular space discharge capacity or annular space maximum pressure enters load fluid by annular space, in order to satisfy the requirement of required discharge capacity of pressure break and reservoir fracture propagation pressure, it is 1/3～1/2 of oil pipe injection discharge capacity that the oil jacket annular space injects discharge capacity.
After B, first section pressure break are finished, drop into steel ball from oil pipe top well head big four 1, treat that steel ball drops on the sliding sleeve of second level ejector 5, strengthen pump pressure, shear the pin that is connected between ejector and the sliding sleeve, sliding sleeve and steel ball together fall on the sleeve base.At this moment, link up by second ejector 5 and K344 packer 6 and second section horizontal well gas-bearing formation section, sliding sleeve and steel ball shutoff the passage of oil pipe and first section gas-bearing formation section.Under the situation that need not drag tubing string, when carrying out upper strata jetting pressure break by above-mentioned operation again, since hydraulic ejector under normal pressing crack construction discharge capacity its inside and outside differential pressure greater than 10MPa, and the pressure reduction that sets of K344 packer only needs 4～8MPa, that is to say that during upper strata jetting pressure break, the K344 packer is in the state of setting always, the fracturing fluid lower floor of can " not bleeding " can only enter the upper strata that needs pressure break.
C, repeat A step and B step successively, finish multistage layering perforation and pressure break.
(6) discharge opeing: the oil jacket annular space injects liquid nitrogen and carries out discharge opeing.In the oil jacket annular injection liquid nitrogen process, note the control casing pressure.If stop-spraying occurs in the discharge opeing process, then carry out the discharge opeing of handling up of the positive fluid injection nitrogen of oil pipe.If still discharge opeing is obstructed, adopt the discharge opeing of handling up of the positive fluid injection nitrogen of coiled tubing.
(7) finish discharge opeing after, test and ask product.
The beneficial effects of the utility model:
The first,, drop into the smooth recovery of steel ball after the trafficability characteristic of multistage steel ball and the pressure break when having guaranteed pressure break owing to adopted high voltage bearing big latus rectum fracture well head.
The second, with 3 of grade of steel P110 1/ 2" external upset tubing injects pressure break, satisfies the requirement of pressing crack construction tensile strength.
Three, adopt hydraulic anchor, guaranteed passing through of steel ball, satisfied the requirement of anchorage force simultaneously, guaranteed the safety of fracturing technology tubing string.
Four, adopt the difunctional mode of giving up, minimum latus rectum 76mm.Adopt the mode that pitching hydraulic pressure is given up and rotational release combines, farthest reduced the risk that the later stage tubing string pulls out of hole.
Five, K344 packer sealing pressure reduction 70MPa, sliding sleeve control sets, and with the shared steel ball of respective injectors, can control the opportunity that packers at different levels have an effect and the validity of packing.Guarantee the contribution rate of each interval, improved the effect of construction.
Six, with gas water horizontal well 4 in early stage 1/ 2The technical problem that the gas water horizontal well multistage that " sleeve pipe is not cemented the well or sieve tube completion fixed tubular column hydraulic sand blasting fracturing technique is compared; solved 6 " under the well barefoot completion mode, long horizontal segment physical difference are big is transformed, increase the transformation hop count, improved the staged fracturing effect.
Description of drawings
Fig. 1 is a barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubular column structure generalized section.
Among the figure, 1. well head big four, 2.3 1/ 2" external upset tubing, 3. hydraulic anchor, 4. safety joint, 5. ejector, 6.K344 packer, 7. ball seat, 8. float shoe.
The specific embodiment
Embodiment 1: with a barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubing string is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubing string is mainly by well head big four 1,3 1/ 2" external upset tubing 2, hydraulic anchor 3, safety joint 4, ejector 5, K344 packer 6, ball seat 7 and float shoe 8 are formed.Be fixed with well head big four 1 at the horizontal well well head, be connected with oil pipe in the lower end of well head big four 1.Oil pipe is that grade of steel is 3 of P110 1/ 2" external upset tubing 2.3 1/ 2" be connected with a hydraulic anchor 3 on the tubing string that external upset tubing 2 is formed, the bottom of hydraulic anchor 3 is connected with a big latus rectum safety joint 4.Hydraulic anchor 3 and safety joint 4 are in the diameter segment of horizontal well.On the tubing string of net horizontal section, be connected with the 7th grade of ejector 5, K344 packer 6, sleeve base, the 6th grade of ejector 5, K344 packer 6, sleeve base, level V ejector 5, K344 packer 6, sleeve base, fourth stage ejector 5, K344 packer 6, sleeve base, third level ejector 5, K344 packer 6, sleeve base, second level ejector 5, K344 packer 6, sleeve base and first order ejector 5 from top to bottom in turn, be connected with ball seat 7 in the lower end of first order ejector 5, the lower end of ball seat 7 connects a float shoe 8.
Claims (1)
Priority Applications (1)
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| CN102182438A (en) * | 2011-06-03 | 2011-09-14 | 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 | Layered fracturing technology for variable-length graded sliding sleeve |
| CN102418508A (en) * | 2011-12-09 | 2012-04-18 | 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 | Water jet packing tool |
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| CN104131782A (en) * | 2014-07-10 | 2014-11-05 | 上海大学 | Drifting bottom hole assembly determining method |
| CN104373103A (en) * | 2014-12-08 | 2015-02-25 | 中国石油天然气股份有限公司 | Old well slot temporary blockage refracturing tubular column and method capable of achieving large-displacement construction |
| CN105822253A (en) * | 2015-01-06 | 2016-08-03 | 中国石油天然气股份有限公司 | Bushing sliding sleeve and hydraulic bridge plug combined type completion pipe string and rapid fracturing method |
| CN105649598A (en) * | 2016-03-11 | 2016-06-08 | 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 | Archimedean-double-helix flow split type double-cluster hydraulic ejection and fracturing integrated tubular column |
| CN105649598B (en) * | 2016-03-11 | 2019-01-04 | 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 | The double cluster hydraulic jetting fracturing integrated pipe columns of Archimedes's double helix shunt |
| CN105781515A (en) * | 2016-03-18 | 2016-07-20 | 河南理工大学 | Coiled tubing staged fracturing stimulation method for super high seams of vertical wells of coal bed gas |
| CN107489405A (en) * | 2017-09-20 | 2017-12-19 | 中国石油集团西部钻探工程有限公司 | Coiled tubing drags abrasive perforating and the method for annular space back-up sand staged fracturing |
| CN108868734A (en) * | 2018-04-24 | 2018-11-23 | 中国石油天然气股份有限公司 | Gas well solvable packer multiple fracturing completion integral partial pressure tubular column and method |
| CN110005374A (en) * | 2019-03-26 | 2019-07-12 | 山西沁盛煤层气作业有限责任公司 | A kind of coal bed gas well one-trip string multilayer partial pressure reforming technology |
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