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 PDF

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Publication number
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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CN
China
Prior art keywords
ejector
packer
well
staged fracturing
horizontal
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CN2010205203480U
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Chinese (zh)
Inventor
王在强
徐永高
慕立俊
赵振峰
李宪文
付钢旦
赵粉霞
桂捷
赵广民
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中国石油天然气股份有限公司
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Priority to CN2010205203480U priority Critical patent/CN201802376U/en
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Publication of CN201802376U publication Critical patent/CN201802376U/en

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Abstract

The utility model relates to a barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string, applied to staged fracturing construction after gas field horizontal well barefoot well completion. An oil string composed of 31/2'' external upset tubing is connected with a hydraulic anchor, the lower part of the hydraulic anchor is connected with a safety joint, the hydraulic anchor and the safety joint are in the diameter section of a horizontal well; and the oil string at the horizontal well section is sequentially connected with seven groups of ejectors, K344 packers and sliding sleeve bases from top to bottom. The lower end of a first stage ejector is connected with a ball seat, and the lower end of the ball seat is connected with a float shoe. The utility model has the effects that the technical problem of gas field horizontal well multi-stage modification under the conditions of 6'' well bore barefoot well completion and big long horizontal section physical property difference is solved, number of stages to be modified is increased and staged fracturing effect is improved.

Description

Barefoot completion hydraulic sand blasting fixed tubular column staged fracturing tubing string

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)

1. 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; the lower end at well head big four (1) is connected with oil pipe, it is characterized in that: described oil pipe is 3 1/ 2" external upset tubing (2) 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) from top to bottom in turn, 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), 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).
CN2010205203480U 2010-09-07 2010-09-07 Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string CN201802376U (en)

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CN2010205203480U CN201802376U (en) 2010-09-07 2010-09-07 Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string

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CN2010205203480U CN201802376U (en) 2010-09-07 2010-09-07 Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102839920A (en) * 2012-08-07 2012-12-26 中国石油化工股份有限公司 Multi-segment transforming tubular column for horizontal well and use method for same
CN102852504A (en) * 2012-09-13 2013-01-02 中国石油天然气股份有限公司 Immobile pipe column multi-layer fracturing tool string for vertical shaft
CN102979495A (en) * 2012-12-28 2013-03-20 中国石油集团渤海钻探工程有限公司 Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof
CN103075139A (en) * 2011-10-26 2013-05-01 中国石油天然气股份有限公司 Immovable string hydraulic jetting technology for fracture acidizing and string for immovable string hydraulic jetting technology for fracture acidizing
CN103277078A (en) * 2013-06-04 2013-09-04 中国海洋石油总公司 Hydraulic sliding sleeve
CN103628864A (en) * 2013-11-22 2014-03-12 中国石油天然气股份有限公司 Multi-segment fractured horizontal well intelligent test system and method
CN104131782A (en) * 2014-07-10 2014-11-05 上海大学 Drifting bottom hole assembly determining method
CN104278979A (en) * 2013-07-05 2015-01-14 中国石油天然气股份有限公司 Coiled tubing perforation bridge plug sealing, separating and fracturing 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
WO2015074243A1 (en) * 2013-11-22 2015-05-28 中国石油天然气股份有限公司 Intelligent test system and method for multi-segment fractured horizontal well
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
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
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
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

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182438B (en) * 2011-06-03 2013-07-03 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
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
CN103075139A (en) * 2011-10-26 2013-05-01 中国石油天然气股份有限公司 Immovable string hydraulic jetting technology for fracture acidizing and string for immovable string hydraulic jetting technology for fracture acidizing
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
CN102418508B (en) * 2011-12-09 2014-05-07 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 Using method of water jet packing tool
CN102839920A (en) * 2012-08-07 2012-12-26 中国石油化工股份有限公司 Multi-segment transforming tubular column for horizontal well and use method for same
CN102839920B (en) * 2012-08-07 2015-04-22 中国石油化工股份有限公司 Multi-segment transforming tubular column for horizontal well and use method for same
CN102852504A (en) * 2012-09-13 2013-01-02 中国石油天然气股份有限公司 Immobile pipe column multi-layer fracturing tool string for vertical shaft
CN102979495B (en) * 2012-12-28 2016-06-29 中国石油集团渤海钻探工程有限公司 Many bunches of Limited entry fracturing tubing strings of open-hole horizontal well and fracturing process thereof
CN102979495A (en) * 2012-12-28 2013-03-20 中国石油集团渤海钻探工程有限公司 Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof
CN103277078B (en) * 2013-06-04 2016-01-27 中国海洋石油总公司 A kind of hydraulic sliding sleeve
CN103277078A (en) * 2013-06-04 2013-09-04 中国海洋石油总公司 Hydraulic sliding sleeve
CN104278979A (en) * 2013-07-05 2015-01-14 中国石油天然气股份有限公司 Coiled tubing perforation bridge plug sealing, separating and fracturing method
CN103628864A (en) * 2013-11-22 2014-03-12 中国石油天然气股份有限公司 Multi-segment fractured horizontal well intelligent test system and method
WO2015074243A1 (en) * 2013-11-22 2015-05-28 中国石油天然气股份有限公司 Intelligent test system and method for multi-segment fractured horizontal well
CN103628864B (en) * 2013-11-22 2016-01-06 中国石油天然气股份有限公司 Multistage pressure break horizontal well intelligent test system and method for testing
US9605531B2 (en) 2013-11-22 2017-03-28 Petrochina Company Limited Intelligent test system and method for multi-segment fractured horizontal well
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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Granted publication date: 20110420