CN203783506U - Cylindrical-tooth milling shoe used for milling of composite bridge plug - Google Patents

Cylindrical-tooth milling shoe used for milling of composite bridge plug Download PDF

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Publication number
CN203783506U
CN203783506U CN201420160110.XU CN201420160110U CN203783506U CN 203783506 U CN203783506 U CN 203783506U CN 201420160110 U CN201420160110 U CN 201420160110U CN 203783506 U CN203783506 U CN 203783506U
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China
Prior art keywords
junk mill
liquid bath
milling
row liquid
tooth
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CN201420160110.XU
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Chinese (zh)
Inventor
卢秀德
段国彬
钟海峰
郭建华
向刚
邱勇潮
邹先雄
宋丹
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China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
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CNPC Chuanqing Drilling Engineering Co Ltd
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Abstract

The utility model discloses a cylindrical-tooth milling shoe used for milling of a composite bridge plug. The cylindrical-tooth milling shoe comprises a joint body and a milling shoe body. One end of the joint body is an internal thread connection end and the other end of the joint body is connected with the milling shoe body. An inner cavity of the joint body is a main operating fluid channel, one end of which penetrates through the internal thread connection end. The other end of the main operating fluid channel is communicated with the bottom of the milling shoe body via an inclined hole. A first fluid discharge tank is arranged in the outer wall of the milling shoe body. A second fluid discharge tank is arranged in a working surface at the bottom of the milling shoe body. The first fluid discharge tank is communicated with the second fluid discharge tank, the depth of which is smaller than that of the first fluid discharge tank. A milling tooth is arranged on the working surface. A plumb hole is formed in the second fluid discharge tank and communicated with the main operating fluid channel via the inclined hole. The cylindrical-tooth milling shoe used for milling of the composite bridge plug has following beneficial effects: drilling chips are carried by the operating fluid to be away from the working surface beneficially and quickly move upwardly, thus preventing the drilling chips from being accumulated on the working surface and from mixing with the operating fluid to from solid-liquid two-phase flow which may cause damage to the milling shoe.

Description

For the tooth-like junk mill of post of composite bridge plug milling
Technical field
The utility model relates to industrial gas oil underground construction technical field, exactly relates to the tooth-like junk mill of continuous tubing drill mill composite bridge plug construction operation post.
Background technology
In continuous oil pipe operation, continuous tubing drill mill composite bridge plug operation technique is the important means of industrial gas oil down-hole completion practice with pressure, is the new technology that integrates continuous oil pipe device, positive displacement motor helicoid hydraulic motor, milling tool, ground infusion and return discharge opeing filtering technique.It utilizes coiled tubing to transmit positive displacement motor and milling tool, utilize continuous oil pipe device real-time data monitoring system to obtain the crucial construction datas such as infusion pressure, infusion discharge capacity, well head pressure, the pressure of the drill, brill mill drilling depth, implement realtime construction project setting, construction commander and optimization operation, utilize ground pumping-in equipment to implement to bore mill operation by coiled tubing and positive displacement motor helicoid hydraulic motor for milling tool provides power.
Because continuous tubing drill mill bridging plug technique waits that the composite bridge plug that bores mill is made up of materials such as composite plastic, rubber, cast irons, and the performance of different bridging plugs differs widely.Milling talus accumulation is at work plane, form two-phase solid-liquid fluid with working solution, make junk mill bottom surface liquid flow complex shape, junk mill is caused to serious abrasion and erosion, cause falling tooth or broken teeth, and then continuous tubing drill mill construction operation is stopped, and have a strong impact on efficiency of construction, strengthen well control security risk.Therefore, rational in infrastructure, performance is efficient, bulk strength is high, strong shock resistance, be easy to clean and cooling, chip removal is effective, the junk mill that is applicable to the milling of moderate strength material composite bridge plug becomes continuous tubing drill mill bridging plug technique to high-efficiency and removes composite bridge plug in well, guarantees the key tool that pit shaft is unimpeded.
In prior art, common junk mill has multiple, for example China Patent No. " 201210423477.1 " discloses a kind of concave bottom milling shoe, open day is 2013-02-06, comprise successively connected junk mill body, intermediate and fittings body, wherein junk mill body and fittings body are cylinder, and the diameter of junk mill body is greater than the diameter of fittings body; And one end that junk mill body is connected with intermediate is spill, its radian is 33.5 °, is provided with several vertical holes above.
But existing common junk mill easy sideslip when composite bridge plug in milling well, and injury sleeve pipe, junk mill body rectangle rhone easily blocks the row's of returning chip, and the present situation such as junk mill bottom work under bad environment, cause overlay cladding entirety to come off, stock-removing efficiency reduces, and therefore in the operation of continuous tubing drill mill, can not use common junk mill milling moderate strength material composite bridge plug.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that existing junk mill exists, and provides a kind of post for composite bridge plug milling tooth-like junk mill.The utility model is conducive to working solution and carries to bore and grind bits and leave work plane, returns on rapidly, can avoid boring grinding that bits are deposited in work plane and working solution is mixed to form solid-liquid two-phase flow, causes the injury to junk mill.
For achieving the above object, the technical solution adopted in the utility model is as follows:
The tooth-like junk mill of a kind of post for composite bridge plug milling, it is characterized in that: comprise fittings body and junk mill body, described fittings body one end is internal thread link, the other end arranges junk mill body, fittings body inner chamber is main working solution passage, main working solution passage one end connects internal thread link, and the other end is communicated to mill shoe bottom by angling hole; On the external wall of junk mill, be provided with first row liquid bath, on the work plane of mill shoe bottom, be provided with second row liquid bath, first row liquid bath is communicated with second row liquid bath, and the degree of depth of first row liquid bath is greater than the degree of depth of second row liquid bath, on work plane, be provided with mill teeth, in second row liquid bath, be provided with vertical hole, main working solution passage is communicated to vertical hole by angling hole.
Described mill teeth comprises all inlays the carbide cutting element and the tungsten carbide bloom that are arranged on junk mill body running face.
Described tungsten carbide bloom is multiple, forms tungsten carbide steel band on work plane.
Described first row liquid bath and second row liquid bath are three, and corresponding setting one by one, the setting adjacent with second row liquid bath of tungsten carbide steel band.
Described junk mill body top is provided with the changeover portion that is round table-like, on changeover portion, is provided with polycrystalline diamond sheet by built-up welding.
Described angling hole is three, is evenly distributed on fittings body vertical hole and angling hole corresponding setting one by one.
Employing the utility model has the advantage of:
1, in the utility model, the degree of depth of first row liquid bath is greater than the degree of depth of second row liquid bath, shallow sump pit and dark sump pit organically combine, such form of structure, more being conducive to working solution carries to bore and grinds bits and leave work plane, rapidly, return, avoid boring and grind that bits are deposited in work plane and working solution is mixed to form solid-liquid two-phase flow, cause the injury to junk mill.
2, in the utility model, adopt " internal thread link, fittings body, changeover portion, junk mill body, vertical hole, angling hole, main working solution passage, shallow-water tank and bendway " integrated structure design, simple in structure, be skillfully constructed, junk mill intensity is high, safe and reliable, can meet the requirement of continuous tubing drill mill operation, can extensively should have in the down-hole that meets bridging plug and bore mill construction operation.
3, in the utility model; junk mill body bottom surface is by design pitch and hole depth boring; accompany protective material welding-on in hole, junk mill body bottom with welding rod tungsten carbide bloom and carbide cutting element; safe and convenient, intensity are high; can effectively tackle mill shoe bottom operating environment complexity; slow down and treat milling thing and the corrasion of bottom flow to junk mill, can meet the job requirements of continuous tubing drill mill hard composite bridge plug.
4, in the utility model, described junk mill body top is provided with the changeover portion that is round table-like, on changeover portion, is provided with polycrystalline diamond sheet by built-up welding, fittings body and junk mill body is coordinated tightr, and structural strength is higher.
5,, in the utility model, described angling hole is three, be evenly distributed on fittings body, and vertical hole and angling hole corresponding setting one by one, this structure makes discharge opeing more even, further avoids boring grinding to consider to be worth doing being deposited in work plane.
6, the utility model compared with prior art, shallow sump pit and dark sump pit organically combine, and are beneficial on chip and return, and milling chip carries by latent sump pit and takes away work plane by working solution, by returning on dark sump pit, reduce abrasion or the erosion injury of solid particle to junk mill bottom.
7,, compared with the utility model only adopts carbide cutting element with prior art, carbide cutting element and tungsten carbide bloom combination-inlaying, on junk mill body, to hard composite bridge plug, are beneficial to and improve single junk mill milling efficiency, reduce the trip time.
8, in the utility model, described first row liquid bath and second row liquid bath are three, and corresponding setting one by one, the setting adjacent with second row liquid bath of tungsten carbide steel band, adopt this structure, not only improve single junk mill milling efficiency, also help the brill that tungsten carbide steel band is produced and grind bits fast by first row liquid bath and the discharge of second row liquid bath.
Brief description of the drawings
Fig. 1 is the utility model cross-sectional view
Fig. 2 is the utility model polycrystalline substance schematic diagram
In figure, be labeled as: 1, internal thread link, 2, fittings body, 3, changeover portion, 4, junk mill body; 5, angling hole, 6, main working solution passage, 7, carbide cutting element, 8, tungsten carbide bloom; 9, cutting teeth topping, 10, second row liquid bath, 11, vertical hole, 12, first row liquid bath.
Detailed description of the invention
Embodiment 1
The tooth-like junk mill of a kind of post for composite bridge plug milling, comprise fittings body 2 and junk mill body 4, described fittings body 2 one end are internal thread link 1, the other end arranges junk mill body 4, fittings body 2 inner chambers are main working solution passage 6, main working solution passage 6 one end connect internal thread link 1, and the other end is communicated to junk mill body 4 bottoms by angling hole 5; On junk mill body 4 outer walls, be provided with first row liquid bath 12, on the work plane of junk mill body 4 bottoms, be provided with second row liquid bath 10, first row liquid bath 12 is communicated with second row liquid bath 10, and the degree of depth of first row liquid bath 12 is greater than the degree of depth of second row liquid bath 10, on work plane, be provided with mill teeth, in second row liquid bath, 10 are provided with vertical hole 11, and main working solution passage 6 is communicated to vertical hole 11 by angling hole 5.
Preferred embodiment of the present utility model is that described mill teeth comprises all inlays the carbide cutting element 7 and the tungsten carbide bloom 8 that are arranged on junk mill body 4 work planes.Carbide cutting element 7 is identical with prior art.
Another preferred embodiment of the present utility model is that described tungsten carbide bloom 8 is multiple, forms tungsten carbide steel band on work plane.
Another preferred embodiment of the present utility model is that described first row liquid bath 12 and second row liquid bath 10 are three, and corresponding setting one by one, the setting adjacent with second row liquid bath 10 of tungsten carbide steel band.
Another preferred embodiment of the present utility model is that described junk mill body 4 tops are provided with the changeover portion 3 that is round table-like, on changeover portion 3, are provided with polycrystalline diamond sheet by built-up welding.
Another preferred embodiment of the present utility model is that described angling hole 5 is three, is evenly distributed on fittings body 2 vertical hole 11 and angling hole 5 corresponding setting one by one.
Embodiment 2
The tooth-like junk mill of a kind of post for composite bridge plug milling; comprise fittings body and junk mill body; angling hole and vertical hole provide working solution flow channel; second row liquid bath on second row liquid bath and the junk mill body sidewall of junk mill bottom work plane organically combines for chip and returns out; press design pitch and hole depth boring (without particular/special requirement) in junk mill body bottom surface with drilling machine; carbide cutting element and tungsten carbide bloom are accompanied in protective material welding-on and boring with welding rod; and reserved design length, length can adopt prior art.
Fittings body and junk mill body adopt the integrated processing of special material hair Bear-grudge entirety, with gas thread bed, fittings body are processed into standard female and connect, fittings body and tiltedly step transition of junk mill body middle part, and built-up welding polycrystalline diamond sheet.
Angling hole and vertical hole are bored mill with boring machine and are formed, and at an angle to each other, and angle is without particular/special requirement.First row liquid bath and second row liquid bath form with milling machine milling, and second row liquid bath is positioned at junk mill body bottom surface, tangent with fittings body outside cylinder, and first row liquid bath is positioned at the external side of junk mill.The degree of depth of first row liquid bath is greater than the degree of depth of second row liquid bath.
Referring to accompanying drawing, the present embodiment is made up of internal thread link 1, fittings body 2, changeover portion 3, junk mill body 4, angling hole 5, main working solution passage 6, carbide cutting element 7, tungsten carbide bloom 8, cutting teeth topping 9, second row liquid bath 10, vertical hole 11 and first row liquid bath 12.
The utility model patent adopts integrated structure design, process fittings body and junk mill body with milling machine, middle tiltedly step transition, and built-up welding polycrystalline diamond sheet, with gas thread bed, fittings body being processed into standard female connects, in fittings body and junk mill body, bore and ground main working solution passage by design angle with boring machine, angling hole and vertical hole, with milling machine respectively at mill shoe bottom milling second row liquid bath, milling first row liquid bath on the external sidewall of junk mill, press design pitch and hole depth boring in junk mill body bottom surface with drilling machine, accompany protective material welding-on in hole, junk mill body bottom with welding rod tungsten carbide bloom and carbide cutting element, and reserved design length, make the tooth-like junk mill of post.The tooth-like meaning of post mainly refers to being used in combination of carbide cutting element and tungsten carbide bloom.

Claims (6)

1. the tooth-like junk mill of the post for composite bridge plug milling, it is characterized in that: comprise fittings body (2) and junk mill body (4), described fittings body (2) one end is internal thread link (1), the other end arranges junk mill body (4), fittings body (2) inner chamber is main working solution passage (6), main working solution passage (6) one end connects internal thread link (1), and the other end is communicated to junk mill body (4) bottom by angling hole (5); On junk mill body (4) outer wall, be provided with first row liquid bath (12), on the work plane of junk mill body (4) bottom, be provided with second row liquid bath (10), first row liquid bath (12) is communicated with second row liquid bath (10), and the degree of depth of first row liquid bath (12) is greater than the degree of depth of second row liquid bath (10), on work plane, be provided with mill teeth, in second row liquid bath (10), be provided with vertical hole (11), main working solution passage (6) is communicated to vertical hole (11) by angling hole (5).
2. the tooth-like junk mill of the post for composite bridge plug milling according to claim 1, is characterized in that: described mill teeth comprises all inlays the carbide cutting element (7) and the tungsten carbide bloom (8) that are arranged on junk mill body (4) work plane.
3. the tooth-like junk mill of the post for composite bridge plug milling according to claim 2, is characterized in that: described tungsten carbide bloom (8), for multiple, forms tungsten carbide steel band on work plane.
4. the tooth-like junk mill of the post for composite bridge plug milling according to claim 3, it is characterized in that: described first row liquid bath (12) and second row liquid bath (10) are three, and corresponding setting one by one, tungsten carbide steel band and the adjacent setting of second row liquid bath (10).
5. according to the tooth-like junk mill of the post for composite bridge plug milling described in claim 1,2,3 or 4, it is characterized in that: described junk mill body (4) top is provided with the changeover portion (3) that is round table-like, changeover portion (3) is upper is provided with polycrystalline diamond sheet by built-up welding.
6. the tooth-like junk mill of the post for composite bridge plug milling according to claim 5, is characterized in that: described angling hole (5) is three, is evenly distributed on fittings body (2) upper, vertical hole (11) and angling hole (5) corresponding setting one by one.
CN201420160110.XU 2014-04-03 2014-04-03 Cylindrical-tooth milling shoe used for milling of composite bridge plug Active CN203783506U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105422032A (en) * 2015-12-24 2016-03-23 中国石油天然气股份有限公司 Special efficient grinding shoe for drift-diameter bridge plugs
CN110984895A (en) * 2019-11-27 2020-04-10 淮安市井神钻采机具有限公司 High-efficiency composite milling tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105422032A (en) * 2015-12-24 2016-03-23 中国石油天然气股份有限公司 Special efficient grinding shoe for drift-diameter bridge plugs
CN110984895A (en) * 2019-11-27 2020-04-10 淮安市井神钻采机具有限公司 High-efficiency composite milling tool

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20200925

Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No.

Patentee after: CHINA NATIONAL PETROLEUM Corp.

Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd.

Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province

Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd.