CN102454370A - Constant-pressure protection device of screw drilling tool - Google Patents

Constant-pressure protection device of screw drilling tool Download PDF

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Publication number
CN102454370A
CN102454370A CN2010105292864A CN201010529286A CN102454370A CN 102454370 A CN102454370 A CN 102454370A CN 2010105292864 A CN2010105292864 A CN 2010105292864A CN 201010529286 A CN201010529286 A CN 201010529286A CN 102454370 A CN102454370 A CN 102454370A
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CN
China
Prior art keywords
valve
hole
pressure
level pressure
valve body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010105292864A
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Chinese (zh)
Inventor
刘延平
胡金铜
郭群
杨继军
王军恒
强华
张立娜
任世举
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Dagang Oilfield Group Co Ltd
Original Assignee
Dagang Oilfield Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dagang Oilfield Group Co Ltd filed Critical Dagang Oilfield Group Co Ltd
Priority to CN2010105292864A priority Critical patent/CN102454370A/en
Publication of CN102454370A publication Critical patent/CN102454370A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a constant-pressure protection device of a screw drilling tool, which is used for overcoming the disadvantage that a pressure safety protection device does not exist in a small-diameter screw drilling tool pipeline used in the current radial hydraulic jetting operation. An upper joint (1), a body (2) and a lower joint (17) are fixedly connected from top to bottom in turn. Both the upper joint (1) and the lower joint (17) are provided with axial through holes. The body (2) is provided with two axial through holes, namely a fluid flow hole (16) and a constant-pressure hole (10). A discharge valve (8) is installed at the upper end of the constant-pressure hole (10). A pressure adjustor (14) is installed at the lower part of the constant-pressure hole (10). A spring (11) is installed between the discharge valve (8) and the pressure adjustor (14). The constant-pressure protection device of the screw drilling tool disclosed by the invention has the benefits that: the device is rational in design and novel in structure; the problems of jamming of the drilling tool and the like in the small-diameter screw drilling tool in the hydraulic jetting construction because of over-high system pressure can be prevented; and the screw drilling tool can be effectively protected.

Description

Helicoid hydraulic motor level pressure protective device
Affiliated technical field
Patent of the present invention relates to a kind of helicoid hydraulic motor level pressure protective device of radially jetting, is applied to down-hole construction operations such as oil recovery, perforation in the oil exploitation, is the supporting protection instrument of helicoid hydraulic motor in the hydraulic perforation technology radially.
Background technology
Radially the hydraulic perforating technology is the effective ways that solve deep penetrating perforating, and this method can eject flow-guiding channel in subterranean strata, is the new technology that improves oil-gas field development level and oil-water well raising the output.When onshore oil field exploitation gets into the middle and later periods, perforation is worn the depth, later stage measures to reform complex process, and the input expense is high, can cause pollution to oil reservoir, has seriously influenced the raising of field output.In the construction of jetting radially pipeline, when helicoid hydraulic motor creeps into when being hampered suddenly, the screw drill inlet pressure can increase rapidly, causes that circulating pressure increases suddenly in the pipeline, causes helicoid hydraulic motor to damage or surpasses the design of string pipe safe pressure, and major accident takes place.Take place for fear of this type accident, in the minor diameter helicoid hydraulic motor pipeline that need in jetting radially, use the constant pressure valve protective device is installed, thereby guarantee the job safety of helicoid hydraulic motor and pipeline in the jetting process.
Summary of the invention
There is not the pressure security protective device in order to overcome in the helicoid hydraulic motor pipeline that uses in the existing radially jetting operation; When helicoid hydraulic motor creeps into when being hampered suddenly; The screw drill inlet pressure can increase rapidly, causes that circulating pressure increases suddenly in the pipeline, causes helicoid hydraulic motor to damage or surpasses the design of string pipe safe pressure; The generation major accident is not enough, and the present invention provides a kind of helicoid hydraulic motor level pressure protective device.
The technical solution adopted for the present invention to solve the technical problems is: top connection, body, the lower contact of helicoid hydraulic motor level pressure protective device from top to bottom are fixedly connected sequentially; Top connection, lower contact all have axially extending bore, and 2 axially extending bores in liquid flow hole and level pressure hole are arranged on the body; The upper end in level pressure hole is equipped with eduction valve, and the bottom is equipped with pressure regulator, between eduction valve and the pressure regulator spring is installed, and the radial drainage hole is arranged on the level pressure hole.The plug of pressure regulator, precompressed adjusting nut, precompressed adjusting rod are installed in the bottom, level pressure hole of body from the bottom to top successively; Plug is connected with body-fixed; Insert in the endoporus of plug upper end the lower end of precompressed adjusting rod.The valve body of eduction valve, valve ball, valve seat are installed in the upper end, level pressure hole of body from top to bottom successively, and valve body is connected with body-fixed, and the axially extending bore of valve body is a current by pass; The radial drainage hole is positioned at valve body below, pressure regulator top.
Another technical scheme of eduction valve is, the valve body of eduction valve, valve rod are installed in the upper end, level pressure hole of body from top to bottom successively, and valve body is connected with body-fixed, and the axially extending bore of valve body is a current by pass; The valve rod upper end is installed in the current by pass of valve body; Between valve rod and the valve body radial direction seal ring is installed; The radial drainage hole is positioned at valve body below, pressure regulator top.
Plug, valve body are threaded with body; Between plug, valve body and the body radial direction seal ring is installed.
The invention has the beneficial effects as follows that reasonable in design, novel structure prevents that problems such as bit freezing from appearring in the minor diameter helicoid hydraulic motor in the jetting construction because of system pressure is excessive, effectively protects the minor diameter helicoid hydraulic motor.
Description of drawings
Fig. 1 is a helicoid hydraulic motor level pressure protective device structural representation of the present invention.
Fig. 2 is another embodiment of the present invention structural representation.
Among the figure: 1. top connection, 2. body, 3. valve body, 4. current by pass, 5. valve ball, 6. valve rod; 7. valve seat, 8. eduction valve, 9. radial drainage hole, 10. level pressure hole, 11. springs, 12. precompressed adjusting rods; 13. the precompressed adjusting nut, 14. pressure regulators, 15. plugs, 16. liquid flow holes, 17. lower contacts.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.But what those skilled in the art should know is to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
The top connection 1 of helicoid hydraulic motor level pressure protective device of the present invention, body 2, lower contact 17 from top to bottom are fixedly connected sequentially, and top connection 1, lower contact 17 all have axially extending bore. Liquid flow hole 16 and 10 two axially extending bores in level pressure hole are arranged on the body 2; The upper end in level pressure hole 10 is equipped with eduction valve 8, and the bottom is equipped with pressure regulator 14, between eduction valve 8 and the pressure regulator 14 spring 11 is installed; Radial drainage hole 9 is arranged on the level pressure hole 10.
The plug 15 of pressure regulator 14, precompressed adjusting nut 13, precompressed adjusting rod 12 are installed in 10 bottoms, level pressure hole of body 2 from the bottom to top successively; Plug 15 is fixedly mounted in the level pressure hole 10 of body 2; Insert in the blind hole of plug 15 upper ends the lower end of precompressed adjusting rod 12.The structure that plug 15 lower ends can be provided for rotating plug is like radial hole, non-cylinder etc.Plug 15 adopts usually with body 2 and is threaded; Between the level pressure hole 10 of plug 15 and body 2 radial direction seal ring is installed.
First technical scheme of eduction valve 8 is, the valve body 3 of eduction valve 8, valve ball 5, valve seat 7 are installed in 10 upper ends, level pressure hole of body 2 from top to bottom successively, and valve body 3 is fixedly mounted in the level pressure hole 10 of body 2; The axially extending bore of valve body 3 is a current by pass 4; Radial drainage hole 9 on the level pressure hole 10 is between valve body 3 and pressure regulator 14.
Another technical scheme of eduction valve 8 is, the valve body 3 of eduction valve 8, valve rod 6 are installed in 10 upper ends, level pressure hole of body 2 from top to bottom successively, and valve body 3 is fixedly mounted in the level pressure hole 10 of body 2; The axially extending bore of valve body 3 is a current by pass 4; Valve rod 6 upper ends are installed in the current by pass 4 of valve body 3, between valve rod 6 and the valve body 3 radial direction seal ring are installed; Radial drainage hole 9 on the level pressure hole 10 is between valve body 3 and pressure regulator 14.
For the ease of assembling, in two technical schemes of eduction valve 8, valve body 3 all adopts with body 2 and is threaded, and can be provided for the structure of rotary valve in the upper end of valve body 3, like radial hole, non-cylinder etc.Between the level pressure hole 10 of valve body 3 and body 2 radial direction seal ring is installed.
The implementation process of helicoid hydraulic motor level pressure protective device of the present invention is,
At first, with being installed on the body 2 of eduction valve 8 and pressure regulator 14, the precompressed adjusting nut 13 of adjustment pressure regulator 14 is adjusted the height of precompressed adjusting rod 12, confirms the pressure of opening of eduction valve 8 according to drilling tool operation needs; Then, top connection 1 and lower contact 17 are installed in the two ends of body 2 respectively, helicoid hydraulic motor level pressure protective device is connected the helicoid hydraulic motor top in the service line.
When helicoid hydraulic motor service line operating pressure just often, working solution flows into the entrance that arrives helicoid hydraulic motors through the liquid flow hole 16 on top connection 1, the body 2, lower contact 17, this moment, eduction valve 8 was in closed condition.
When helicoid hydraulic motor service line operating pressure surpasses the force value of pressure regulator 14 settings; The valve ball 5 of eduction valve 8 or valve rod 6 are under the effect of working solution; Move down compression spring 11; Open current by pass, the part working solution is discharged the helicoid hydraulic motor pipeline through current by pass 4, level pressure hole 10, the radial drainage hole 9 of valve body 3.
Earial drainage makes when line pressure is lower than setting value, and spring 11 sets back valve ball 5 or valve rod 6 through self elastic force, and eduction valve 8 is closed.Working solution flows to screw drill through liquid flow hole 16, and screw drill entrance pressure is lower than the protection force value that pressure regulator is set, and helicoid hydraulic motor pipeline system pressure is normal, recovers operate as normal.
It should be noted that the foregoing description is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the scope of claims.

Claims (5)

1. helicoid hydraulic motor level pressure protective device; Comprise top connection, body, lower contact; Top connection, body, lower contact from top to bottom are fixedly connected sequentially, and top connection, lower contact all have axially extending bore, it is characterized in that: (10) 2 axially extending bores in liquid flow hole (16) and level pressure hole are arranged on the body (2); The upper end in level pressure hole (10) is equipped with eduction valve (8), and the bottom is equipped with pressure regulator (14), between eduction valve (8) and the pressure regulator (14) spring (11) is installed; Radial drainage hole (9) is arranged on the level pressure hole (10).
2. according to the said helicoid hydraulic motor level pressure of claim 1 protective device, it is characterized in that: the plug (15) of said pressure regulator (14), precompressed adjusting nut (13), precompressed adjusting rod (12) are installed in the bottom, level pressure hole (10) of body (2) from the bottom to top successively; Plug (15) is fixedly connected with body (2); Insert in the blind hole of plug (15) upper end the lower end of precompressed adjusting rod (12).
3. according to the said helicoid hydraulic motor level pressure of claim 2 protective device; It is characterized in that: the valve body (3) of said eduction valve (8), valve ball (5), valve seat (7) are installed in the upper end, level pressure hole (10) of body (2) from top to bottom successively; Valve body (3) is fixedly connected with body (2), and the axially extending bore of valve body (3) is current by pass (4); Radial drainage hole (9) is positioned at valve body (3) below, pressure regulator (14) top.
4. according to the said helicoid hydraulic motor level pressure of claim 2 protective device; It is characterized in that: the valve body (3) of said eduction valve (8), valve rod (6) are installed in the upper end, level pressure hole (10) of body (2) from top to bottom successively; Valve body (3) is fixedly connected with body (2), and the axially extending bore of valve body (3) is current by pass (4); Valve rod (6) upper end is installed in the current by pass (4) of valve body (3), between valve rod (6) and the valve body (3) radial direction seal ring is installed; Radial drainage hole (9) is positioned at valve body (3) below, pressure regulator (14) top.
5. according to claim 3 or 4 said helicoid hydraulic motor level pressure protective devices, it is characterized in that: said plug (15), valve body (3) are threaded with body (2); Between the level pressure hole (10) of plug (15), valve body (3) and body (2) radial direction seal ring is installed.
CN2010105292864A 2010-10-28 2010-10-28 Constant-pressure protection device of screw drilling tool Pending CN102454370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105292864A CN102454370A (en) 2010-10-28 2010-10-28 Constant-pressure protection device of screw drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105292864A CN102454370A (en) 2010-10-28 2010-10-28 Constant-pressure protection device of screw drilling tool

Publications (1)

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CN102454370A true CN102454370A (en) 2012-05-16

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CN2010105292864A Pending CN102454370A (en) 2010-10-28 2010-10-28 Constant-pressure protection device of screw drilling tool

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563908A (en) * 2015-01-19 2015-04-29 西南石油大学 Friction decreasing and resistance reducing torque clutch device and method thereof
CN109538211A (en) * 2019-01-25 2019-03-29 吉林大学 Self-action hydraulic mining drilling tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980135A (en) * 1971-08-18 1976-09-14 Schlumberger Technology Corporation Self-contained, retrievable valving assembly
CN2434500Y (en) * 2000-07-21 2001-06-13 中国石油天然气股份有限公司大港油田公司 Anti-freeze-clog fixed pressure exhaust valve
CN2635906Y (en) * 2003-07-03 2004-08-25 辽河石油勘探局工程技术研究院 Pressure control valve for downhole leakage detection
CN201818247U (en) * 2010-10-28 2011-05-04 大港油田集团有限责任公司 Constant pressure protecting device of screw drilling tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980135A (en) * 1971-08-18 1976-09-14 Schlumberger Technology Corporation Self-contained, retrievable valving assembly
CN2434500Y (en) * 2000-07-21 2001-06-13 中国石油天然气股份有限公司大港油田公司 Anti-freeze-clog fixed pressure exhaust valve
CN2635906Y (en) * 2003-07-03 2004-08-25 辽河石油勘探局工程技术研究院 Pressure control valve for downhole leakage detection
CN201818247U (en) * 2010-10-28 2011-05-04 大港油田集团有限责任公司 Constant pressure protecting device of screw drilling tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563908A (en) * 2015-01-19 2015-04-29 西南石油大学 Friction decreasing and resistance reducing torque clutch device and method thereof
CN109538211A (en) * 2019-01-25 2019-03-29 吉林大学 Self-action hydraulic mining drilling tool
CN109538211B (en) * 2019-01-25 2023-09-15 吉林大学 Automatic hydraulic exploitation drilling tool

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Application publication date: 20120516