CN204552665U - A kind of hydraulic inner cutter for deep-sea Casing-Cutting - Google Patents

A kind of hydraulic inner cutter for deep-sea Casing-Cutting Download PDF

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Publication number
CN204552665U
CN204552665U CN201520152106.3U CN201520152106U CN204552665U CN 204552665 U CN204552665 U CN 204552665U CN 201520152106 U CN201520152106 U CN 201520152106U CN 204552665 U CN204552665 U CN 204552665U
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CN
China
Prior art keywords
housing
cutter
cutter hub
cutting
piston
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Expired - Fee Related
Application number
CN201520152106.3U
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Chinese (zh)
Inventor
冯定
孙巧雷
夏成宇
王杰
陈敏
钱利勤
施雷
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Yangtze University
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Yangtze University
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Priority to CN201520152106.3U priority Critical patent/CN204552665U/en
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Publication of CN204552665U publication Critical patent/CN204552665U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a kind of hydraulic inner cutter for deep-sea Casing-Cutting, belongs to oil, natural gas casing repairing technical field of tools.It is made up of housing, cutter assembly, piston assembly etc., and be characterized in: housing two ends are separately installed with piston assembly, lower contact, housing central section is provided with cutter assembly; Outside housing, centralizer is installed; All open in the middle of piston assembly, in the middle of lower contact and be shaped with runner; Embeddingly on the cutting edge of cutter hub be shaped with carbide alloy, cutter hub end both sides are provided with flat spring by bearing pin; Valve disc center is opened and is shaped with centre bore, and its circumference is manufactured with aperture; Piston and valve disc are located by connecting by cylinder sleeve, are provided with spring between piston and housing.Cutter hub hardness is high, long service life; Cutter hub is regained freely, guarantees cutter hub operation placed in the middle, and structure is simple, and easy to operate, cutting efficiency improves greatly; Solve existing cutter hub and regain difficulty in housing, cutter hub hardness is poor, and application life is short, and structure and complicated operation, very easily there is the problem of cutting accident.

Description

A kind of hydraulic inner cutter for deep-sea Casing-Cutting
Technical field
The utility model relates to a kind of hydraulic inner cutter for deep-sea Casing-Cutting, belongs to oil, natural gas casing repairing technical field of tools.
Background technology
For some without the offshore oil gas well of extraction value, in order to reduce or eliminate its pollution to marine environment, need closed these not have the Oil/gas Well of economic worth, and then progressively complete abandoned well operation, last procedure completing abandoned well operation is recovery of casing.Thermal cutting is mainly for deep-sea cutting technique under water and two kinds of modes are cut in cold cut in prior art, thermal cutting and cold cut are cut and are also comprised a lot of cutting method separately, but according to the problem such as cost, technology, safety, reliability that relevant laws and the needs thereof of National Bureau of Oceanography are considered, alternative cutting technique is not a lot.
In order to safety, efficient, high-quality, environmental protection complete deep water casing cutting, mechanical hydraulic cutter Casing-Cutting is with its safety, stable, economic feature and being widely used.But the blade mechanical strength of this type of hydraulic inner cutter is poor, and application life is short; And cutter hub regains difficulty in cover after cutting; In addition, tool construction and complicated operation, very easily cause cutting accident, have a strong impact on cutting efficiency.
Summary of the invention
The purpose of this utility model is, providing a kind of increases cutter hub hardness, long service life; Freely, ensure cutter hub operation placed in the middle all the time, structure is simple, easy to operate, safety, and cutting efficiency improves greatly for cutter hub withdrawal, relieving; Regain difficulty in housing to solve existing cutter hub, cutter hub hardness is poor, causes application life short, and structure and complicated operation, very easily there is cutting accident, have a strong impact on the hydraulic inner cutter for deep-sea Casing-Cutting of cutting efficiency problem.
The utility model realizes above-mentioned purpose by the following technical solutions
This hydraulic inner cutter being used for deep-sea Casing-Cutting is made up of cylinder sleeve, housing, centralizer, lower contact, limited block, flat spring, compact heap, cutter assembly, piston assembly, it is characterized in that: shell one end is provided with piston assembly, the housing other end is provided with lower contact, and housing central section is provided with cutter assembly; Outside housing, centralizer is installed; Centralizer is made up of six wiper blocks along the uniform installation of housing circumferencial direction; All open in the middle of piston assembly, in the middle of lower contact and be shaped with runner.
Described piston assembly is made up of piston, spring, centerbody, valve disc; The piston end of piston assembly and centerbody, valve disc and centerbody are all by being welded to connect; Piston and valve disc are located by cylinder sleeve and are fastenedly connected, and are provided with spring between piston and housing.
Described cylinder sleeve is made up of equal-sized three arc lobes.
Described valve disc center is opened and is shaped with centre bore, uniformly around centre bore is manufactured with at least five apertures.
Described cutter assembly is made up of cutter hub, knife rest, bearing pin, three knife rests of cutter assembly are along the spaced 120 ° of installations of circumference of inner walls, cutter hub is arranged on knife rest by bolt, cutter hub end both sides are provided with flat spring by bearing pin, the housing in cutter hub end front is provided with limited block, the bonding surface between limited block and housing is provided with compact heap.
The cutting edge of described cutter hub is inlaid with carbide alloy.
Described lower contact is installed on housing by screw thread, and open in the middle of lower contact and be shaped with runner, lower contact one end is manufactured with taper thread.
The utility model beneficial effect is compared with prior art:
This hydraulic inner cutter for deep-sea Casing-Cutting, due to cutter hub being inlaid with carbide alloy, effectively improving cutter hub hardness, greatly strengthens cutting ability, extend the application life of cutter hub.Set up flat spring, ensure that cutter hub income housing is freely smooth and easy.When turn on pump drilling tool rotating speed is less, centralizer can make cutter hub safe operation securely between two parties all the time.Overall structure is simple, easy to operate, safety, and cutting efficiency improves greatly; Solve existing cutter hub perfectly and regain difficulty in housing, cutter hub hardness is poor, causes application life short, and structure and complicated operation, very easily there is cutting accident, have a strong impact on the problem of cutting efficiency.The utility model can accurate, agile, the cutting that completes deep-sea sleeve pipe safely.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of overall structure schematic diagram of the hydraulic inner cutter for deep-sea Casing-Cutting;
Accompanying drawing 2 is the end face structure schematic diagram of valve disc;
Accompanying drawing 3 is the main TV structure schematic diagram of flat spring.
In figure: 1, cylinder sleeve, 2, piston, 3, housing, 4, cutter hub, 5, limited block, 6, centralizer, 7, lower contact, 8, centerbody, 9, spring, 10, knife rest, 11, bearing pin, 12, flat spring, 13, compact heap, 14, valve disc, 15, centre bore, 16, aperture.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail:
This hydraulic inner cutter being used for deep-sea Casing-Cutting is made up of cylinder sleeve 1, housing 3, limited block 5, centralizer 6, lower contact 7, flat spring 12, compact heap 13, cutter assembly, piston assembly, housing 3 one end is provided with piston assembly, housing 3 other end is provided with lower contact 7, is provided with cutter assembly in the middle part of housing 3; Centralizer 6 is installed outside housing 3; All open in the middle of piston assembly, in the middle of lower contact 7 and be shaped with runner; Piston assembly is made up of piston 2, centerbody 8, spring 9, valve disc 14; Cutter assembly is made up of cutter hub 4, knife rest 10, bearing pin 11; Centralizer 6 is made up of six wiper blocks along the uniform installation of housing 3 circumferencial direction.
Three knife rests 10 of cutter assembly are along the spaced 120 ° of uniform installations of circumference of housing 3 inwall, cutter hub 4 is arranged on knife rest 10 by bolt, the cutting edge of cutter hub 4 is inlaid with carbide alloy, cutter hub 4 end both sides are provided with flat spring 12 by bearing pin 11, the housing 3 in cutter hub 4 end front is provided with limited block 5, the bonding surface between limited block 5 and housing 3 is provided with compact heap 13; Piston 2 end of piston assembly and centerbody 8, valve disc 14 and centerbody 8 are all by being welded to connect; Valve disc 14 center is opened and is shaped with centre bore 15, and the surrounding of centre bore 15 is uniform is manufactured with at least five apertures 16; Piston 2 and valve disc 14 are located by cylinder sleeve 1 and are fastenedly connected, and cylinder sleeve 1 is made up of equal-sized three arc lobes; Spring 9 is installed between piston 2 and housing 3; Lower contact 7 is installed on housing 3 by screw thread, and open in the middle of lower contact 7 and be shaped with runner, lower contact 7 one end is manufactured with taper thread.(see accompanying drawing 1 ~ 3)
The taper thread that lower contact 7 one end makes, can attaching plug or other downhole tool.
Limited block 5 plays position-limiting action, the maximum overhang of restriction cutter hub 4.
Flat spring 12 is all equipped with in cutter hub 4 both sides, and flat spring 12 is fixed by compact heap 13 and limited block 5.
This course of work being used for the hydraulic inner cutter of deep-sea Casing-Cutting is as follows:
After turn on pump, drilling fluid is entered by housing 3 upper end, after flowing through housing 3 upper end regulator hole, flowed out by centre bore 15 runner of valve disc 14 and five aperture 16 runners of surrounding, this fluid produces the effect of pressure to piston 2 and valve disc 14 simultaneously, promotes piston 2, valve disc 14 and centerbody 8 and moves downward Compress Spring 9 vertically, centerbody 8 releases cutter hub 4 when moving downward, cutter hub 4 rotates along bearing pin 11 and stretches out, spacing due to limited block 5, and the maximum overhang of cutter hub 4 is limited.Meanwhile, cutter hub 4 stretches out and makes flat spring 12 pressurized, and instrument integral-rotation starts cutting operation; Complete termination of pumping after cutting operation, piston 2 and centerbody 8 return to original position under the effect of spring 9, and now under the effect of flat spring 12, cutter hub 4 can be recovered to smooth and easy, rapidly in housing 3, then pull out of hole, from deep-sea retrieving tool.
This cutter hub 4 being used for the hydraulic inner cutter of deep-sea Casing-Cutting is inlaid with carbide alloy, substantially improves cutting ability, improve cutter life and stock-removing efficiency.Adopt flat spring 12, ensure that cutter hub 4 is more prone to draw in housing 3.When the turn on pump initial stage, drilling tool rotating speed was less, centralizer 6 can make cutter hub 4 keep center condition.Overall structure is simple, and easy to use, the efficiency of Casing-Cutting is high, Neng Gouhao, completes the cutting of deep-sea sleeve pipe soon, safely.
The above is the detailed description of the invention of this invention, above-mentioned illustrating is not construed as limiting flesh and blood of the present utility model, person of an ordinary skill in the technical field can make an amendment above-mentioned detailed description of the invention or be out of shape after having read this manual, and does not deviate from essence of the present utility model and scope.

Claims (7)

1. the hydraulic inner cutter for deep-sea Casing-Cutting, it is made up of cylinder sleeve (1), housing (3), limited block (5), centralizer (6), lower contact (7), flat spring (12), compact heap (13), cutter assembly, piston assembly, it is characterized in that: housing (3) one end is provided with piston assembly, housing (3) other end is provided with lower contact (7), and housing (3) middle part is provided with cutter assembly; Centralizer (6) is installed outside housing (3); Centralizer (6) is made up of six wiper blocks along the uniform installation of housing (3) circumferencial direction; All open in the middle of piston assembly, in the middle of lower contact (7) and be shaped with runner.
2. the hydraulic inner cutter for deep-sea Casing-Cutting according to claim 1, is characterized in that: described piston assembly is made up of piston (2), spring (9), centerbody (8), valve disc (14); Piston (2) end of piston assembly and centerbody (8), valve disc (14) and centerbody (8) are all by being welded to connect; Piston (2) and valve disc (14) are located by cylinder sleeve (1) and are fastenedly connected, and are provided with spring (9) between piston (2) and housing (3).
3. the hydraulic inner cutter for deep-sea Casing-Cutting according to claim 1, is characterized in that: described cylinder sleeve (1) is made up of equal-sized three arc lobes.
4. the hydraulic inner cutter for deep-sea Casing-Cutting according to claim 2, is characterized in that: described valve disc (14) center is opened and is shaped with centre bore (15), and centre bore (15) is uniform is around manufactured with at least five apertures (16).
5. the hydraulic inner cutter for deep-sea Casing-Cutting according to claim 1, is characterized in that: described cutter assembly is made up of cutter hub (4), knife rest (10), bearing pin (11); Three knife rests (10) of cutter assembly are along the spaced 120 ° of installations of circumference of housing (3) inwall, cutter hub (4) is arranged on knife rest (10) by bolt, cutter hub (4) end both sides are provided with flat spring (12) by bearing pin (11), the housing (3) in cutter hub (4) end front is provided with limited block (5), the bonding surface between limited block (5) and housing 3 is provided with compact heap (13).
6. the hydraulic inner cutter for deep-sea Casing-Cutting according to claim 5, is characterized in that: the cutting edge of described cutter hub (4) is inlaid with carbide alloy.
7. the hydraulic inner cutter for deep-sea Casing-Cutting according to claim 1, it is characterized in that: described lower contact (7) is installed on housing (3) by screw thread, open in the middle of lower contact (7) and be shaped with runner, lower contact (7) one end is manufactured with taper thread.
CN201520152106.3U 2015-03-18 2015-03-18 A kind of hydraulic inner cutter for deep-sea Casing-Cutting Expired - Fee Related CN204552665U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520152106.3U CN204552665U (en) 2015-03-18 2015-03-18 A kind of hydraulic inner cutter for deep-sea Casing-Cutting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520152106.3U CN204552665U (en) 2015-03-18 2015-03-18 A kind of hydraulic inner cutter for deep-sea Casing-Cutting

Publications (1)

Publication Number Publication Date
CN204552665U true CN204552665U (en) 2015-08-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104712276A (en) * 2015-03-18 2015-06-17 长江大学 Hydraulic internal cutter for cutting sleeve in deep sea

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104712276A (en) * 2015-03-18 2015-06-17 长江大学 Hydraulic internal cutter for cutting sleeve in deep sea

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150812

Termination date: 20170318