CN206643418U - A kind of plain type self-constriction casing segment milling tool - Google Patents

A kind of plain type self-constriction casing segment milling tool Download PDF

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Publication number
CN206643418U
CN206643418U CN201720273752.4U CN201720273752U CN206643418U CN 206643418 U CN206643418 U CN 206643418U CN 201720273752 U CN201720273752 U CN 201720273752U CN 206643418 U CN206643418 U CN 206643418U
Authority
CN
China
Prior art keywords
milling
housing
central tube
milling cutter
cutter
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.)
Expired - Fee Related
Application number
CN201720273752.4U
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Chinese (zh)
Inventor
林德树
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Yangtze University
Original Assignee
Yangtze University
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 Yangtze University filed Critical Yangtze University
Priority to CN201720273752.4U priority Critical patent/CN206643418U/en
Application granted granted Critical
Publication of CN206643418U publication Critical patent/CN206643418U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

It the utility model is related to a kind of plain type self-constriction casing segment milling tool, category petroleum gas well section milling tool field.The instrument includes housing, milling cutter, stabilizer and central tube, housing is internally provided with runner, central tube is slidably fitted with runner, positive stop lug boss is provided with runner inner wall, positive stop lug boss contacts connection with central tube, cutter groove is evenly equipped with the housing circumference of positive stop lug boss side, cutter groove is interior to be equipped with milling cutter by knife rest and bolt.The tool construction is simple and convenient to operate;It can carry out spacing to the maximum radius that stretches out of milling cutter by limit spring in the course of work, to prevent that milling is excessive, and can effectively prevent the collision between milling cutter and housing;After the completion of milling, milling cutter can shrink under limit spring effect;Simultaneously by the stabilizer of shell one end, making being capable of effective centering before milling;Can available energy reduce the milling cycle, reduce sidetracking cost.

Description

A kind of plain type self-constriction casing segment milling tool
Technical field
It the utility model is related to a kind of plain type self-constriction casing segment milling tool, category petroleum gas well section milling tool neck Domain.
Background technology
In the middle and later periods of oil field development, in order to increase the exploitation benefit of original well, or discarded well secondary development is being carried out When, generally require to cut the well developed or milling goes out one section of barefoot interval, that is, carry out side-drilling windowing.Sidetracking is opened Window is with the obvious advantage, and cost is low, efficiency high, moreover it is possible to good reply deep-well and the complicated landform and complex hole condition of ultradeep well.Sleeve pipe Because magnetic disturbance is few, the requirement to measuring instrument is not also high, relatively broad in current application for section milling windowing.
Although section milling formula Casing Sidetracking Technology comes into the country for many years, current domestic section milling tool is still There is design not reasonable, complicated, cutter hub to shrink the shortcomings that of poor quality, the control difficulty of difficulty, cutter hub etc. is many.
The content of the invention
The utility model purpose is:Offer one kind is simple in construction, easy to operate, can effectively prevent cutter hub overhang mistake Greatly, cutter hub can shrink automatically after completing section milling, and structure of the cutter body intensity is high, long-lived plain type self-constriction casing section milling Instrument.
The technical solution of the utility model is:
A kind of plain type self-constriction casing segment milling tool, including housing, milling cutter, stabilizer and central tube, it is characterised in that: One end of housing is equipped with stabilizer, and the other end termination of housing is provided circumferentially about taper thread, and housing is internally provided with runner, Central tube is slidably fitted with runner, positive stop lug boss is provided with runner inner wall, positive stop lug boss contacts connection, center with central tube One end termination of pipe is provided with flange, and hydrophthalmia is evenly equipped with the circumference of flange, leads on the central tube between flange and positive stop lug boss Cross pad and piston is housed, spring is set with piston, cutter groove is evenly equipped with the housing circumference of positive stop lug boss side, is passed through in cutter groove Knife rest and bolt are equipped with milling cutter, and milling cutter is extended in housing by cutter groove, and the milling cutter extended in housing contacts company with central tube Connect, connecting hole is provided with the housing of milling cutter side, connecting hole connects built with limit spring, one end and the milling cutter of limit spring Connect, the other end of limit spring is connected with housing.
The central tube is domatic with milling cutter contact position.
The beneficial effects of the utility model are:
The plain type self-constriction casing segment milling tool is simple in construction, easy to operate;Can by limit spring in the course of work Maximum stretching radius progress to milling cutter is spacing, to prevent that milling is excessive, and can effectively prevent the collision between milling cutter and housing;Milling After the completion of cutting, milling cutter can shrink under limit spring effect;Pass through the stabilizer of shell one end simultaneously(Centralizer), before making milling Being capable of effective centering;Can available energy reduce the milling cycle, reduce sidetracking cost.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure:1st, housing, 2, milling cutter, 3, stabilizer, 4, central tube, 5, positive stop lug boss, 6, flange, 7, hydrophthalmia, 8, pad, 9th, piston, 10, spring, 11, limit spring.
Embodiment
The plain type self-constriction casing segment milling tool includes housing 1, milling cutter 2, stabilizer 3 and central tube 4, and the one of housing 1 End is equipped with stabilizer 3, and the other end termination of housing 1 is provided circumferentially about taper thread, for the connection with drilling rod;Housing 1 it is interior Portion is provided with runner, and central tube 4 is slidably fitted with runner, positive stop lug boss 5 is provided with runner inner wall, positive stop lug boss 5 is with The contact connection of heart pipe 4, one end termination of central tube 4 are provided with flange 6, and hydrophthalmia 7, flange 6 and limit are evenly equipped with the circumference of flange 6 Piston 9 is equipped with by pad 8 on central tube 4 between the boss 5 of position, spring 10 is set with piston 9.
Cutter groove is evenly equipped with the circumference of housing 1 of the side of positive stop lug boss 5, cutter groove is interior to be equipped with milling cutter 2, milling by knife rest and bolt Knife 2 is extended in housing 1 by cutter groove, and the milling cutter 2 extended in housing 1 contacts connection, central tube 4 and milling cutter 2 with central tube 4 Contact position is domatic.Connecting hole is provided with the housing 1 of the side of milling cutter 2, connecting hole is built with limit spring 11, limit spring 11 One end be connected with milling cutter 2, the other end of limit spring 11 is connected with housing 1.
When the plain type self-constriction casing segment milling tool works, the position of the side-drilling windowing needed for lower first, then pass to Drilling fluid, drilling fluid enter the upper end runner of housing 1 by the runner of drilling rod, drill collar etc., and drilling fluid passes through central tube 4 simultaneously Centre bore and hydrophthalmia 7, the end face of pad 8 is acted on by the drilling fluid of hydrophthalmia 7, due to differential pressure action, promote piston 9, central tube 4 Motion, makes relative motion between central tube 4 and housing 1, while compression spring 10, during this, due to central tube 4 and milling cutter 2 contact positions are domatic, and between central tube 4 and housing 1 in relative motion, the domatic promotion milling cutter 2 of central tube 4 revolves along bolt Turn, so that milling cutter 2 progressively stretches out, at the same time, the drilling fluid into the rear end of housing 1 acts on the inner face of housing 1, enters one Step promotes the stretching of milling cutter 2, and during milling cutter 2 stretches out, due to the effect of limit spring 11, milling cutter 2 stretches out steadily, and limits The maximum of milling cutter 2 is made and has stretched out radius, thus milling radius has been limited.Rotating disk is rotated, drilling rod drives the instrument overall Rotation, milling proceed by, and after required side-drilling windowing is completed, termination of pumping, piston 9, central tube 4, pad 8 return spring 10 Initial position is returned under multiple power effect, milling cutter 2 is contracted in housing 1 under the effect of limit spring 11, acts drilling tool, that is, complete Casing side tracking opens a window.The plain type self-constriction casing segment milling tool is simple in construction, easy to operate;Pass through housing 1 in the course of work The stabilizer 3 of one end(Centralizer), can make being capable of effective centering before milling;Can available energy reduce the milling cycle, reduce sidetracking into This.

Claims (1)

1. a kind of plain type self-constriction casing segment milling tool, including housing(1), milling cutter(2), stabilizer(3)And central tube(4), It is characterized in that:Housing(1)One end stabilizer is housed(3), housing(1)Other end termination it is provided circumferentially about have taper thread, Housing(1)Be internally provided with runner, be slidably fitted with central tube in runner(4), positive stop lug boss is provided with runner inner wall (5), positive stop lug boss(5)With central tube(4)Contact connection, central tube(4)One end termination be provided with flange(6), flange(6)'s Hydrophthalmia is evenly equipped with circumference(7), flange(6)With positive stop lug boss(5)Between central tube(4)On pass through pad(8)Equipped with piston (9), piston(9)On be set with spring(10), positive stop lug boss(5)The housing of side(1)Cutter groove is evenly equipped with circumference, is led in cutter groove Cross knife rest and bolt is equipped with milling cutter(2), milling cutter(2)Housing is extended to by cutter groove(1)It is interior, extend to housing(1)Interior milling cutter (2)With central tube(4)Contact connection, milling cutter(2)The housing of side(1)On be provided with connecting hole, the built-in limited location bullet of connecting hole Spring(11), limit spring(11)One end and milling cutter(2)Connection, limit spring(11)The other end and housing(1)Connection;It is described Central tube(4)With milling cutter(2)Contact position is domatic.
CN201720273752.4U 2017-03-21 2017-03-21 A kind of plain type self-constriction casing segment milling tool Expired - Fee Related CN206643418U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720273752.4U CN206643418U (en) 2017-03-21 2017-03-21 A kind of plain type self-constriction casing segment milling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720273752.4U CN206643418U (en) 2017-03-21 2017-03-21 A kind of plain type self-constriction casing segment milling tool

Publications (1)

Publication Number Publication Date
CN206643418U true CN206643418U (en) 2017-11-17

Family

ID=60279671

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720273752.4U Expired - Fee Related CN206643418U (en) 2017-03-21 2017-03-21 A kind of plain type self-constriction casing segment milling tool

Country Status (1)

Country Link
CN (1) CN206643418U (en)

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GR01 Patent grant
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: 20171117

Termination date: 20180321