CN102758594A

CN102758594A - Flat grind shoe

Info

Publication number: CN102758594A
Application number: CN201210260211XA
Authority: CN
Inventors: 李道贵; 潘大冬; 任振阳
Original assignee: CHONGQING WANGJIANG XINQI MACHINERY Co Ltd; Chongqing Wangjiang Industry Co Ltd
Current assignee: CHONGQING WANGJIANG XINQI MACHINERY Co Ltd; Chongqing Wangjiang Industry Co Ltd
Priority date: 2012-07-26
Filing date: 2012-07-26
Publication date: 2012-10-31

Abstract

The invention discloses a flat grind shoe, which includes a grind shoe composed of a big cylinder body (1-1) and a small cylinder body (1-2), wherein tungsten steel teeth (2) and a rack (3) are arranged on the surface of the end part of the big cylinder body (1-1); the small cylinder body (1-2) is internally provided with internal threads (4) and connected with a pressing drilling rig (5); and water holes (8) are formed in the cavity bodies of the big cylinder body (1-1) and the small cylinder body (1-2). The flat grind shoe is characterized in that at least one water passing groove (6) is formed on the surface of the end part of the big cylinder body (1-1), and the inner end (6-1) and the outer end (6-2) thereof are arranged adjacent to the center and on the outer edge of the surface of the end part thereof; and a slurry passage (7) communicated with the water holes (8) is arranged at the inner end (6-1) thereof. By adopting the water passing groove (6) and the slurry passage (7), the flat grind shoe has the advantages of high grinding speed, long service life and smooth slurry circulation.

Description

A kind of flat junk mill

Technical field

The present invention relates to the down-hole fishing tool of field of petroleum exploitation, be specifically related to a kind of flat junk mill.

Background technology

Flat junk mill is a kind of downhole tool that is used to handle down-hole accident, milling trouble of lost tool in hole, is mainly used in trouble of lost tool in holes such as milling joint, drilling rod, oil pipe, bit cone.

At present; Disclosed flat junk mill on the domestic and international market comprises junk mill body, wolfram steel tooth, tooth bar, internal thread, exert pressure drilling tool and hydrophthalmia hole, and said junk mill body is made up of large cylinder and small cylinder; Be provided with wolfram steel tooth and tooth bar at the large cylinder end surface; In small cylinder, be provided with internal thread, it is connected with the drilling tool of exerting pressure, and said hydrophthalmia hole is in the cavity of said large cylinder and small cylinder.The flat junk mill of this structure did not have tank, did not have slurry channel yet; Tooth bar is arranged at large cylinder end surface across, exists more defective: as owing to there was not tank to drain current, receive the influence of resistances such as current; Make that milling speed is low, and wearing and tearing are big, application life is short; Owing to there is not slurry channel, make mud circulation have some setbacks again, influenced result of use.In addition, owing to also causing abrasion condition to differ, the tooth bar irrational distribution quickened the lost of life.Above many disadvantages has caused the influence basin of trouble of lost tool in hole accident big, and influence time is long, can not get for a long time solving.

Summary of the invention

The technical problem that the present invention will solve provides a kind of mill, and to advance speed fast, the flat smoothly junk mill of long service life, mud circulation.

For solving the problems of the technologies described above; Flat junk mill of the present invention comprises the junk mill body of being made up of large cylinder and small cylinder, is provided with wolfram steel tooth and tooth bar at the end surface of large cylinder; On the small cylinder inner surface, be provided with internal thread; It is connected with the drilling tool of exerting pressure, and in the cavity of large cylinder and small cylinder, is provided with the hydrophthalmia hole, it is characterized in that: also be provided with a tank of crossing with inner and outer end on the said large cylinder end surface at least;

Said the inner of crossing tank is positioned near the center of said large cylinder end surface, and said outer end is positioned at the place, outer of said large cylinder end surface;

The said tank of crossing has three, distributes evenly and at intervals at said large cylinder end surface;

The said place, the inner of crossing tank is provided with the slurry channel that is connected with said hydrophthalmia hole, and this slurry channel forms the inclination angle with crossing tank, and said inclination angle is preferably 5 degree;

The said tank of crossing forms the covering of the fan zone each other;

Said tooth bar is arranged in the covering of the fan zone evenly and at intervals, equidistantly is distributed with the wolfram steel tooth between the said tooth bar;

Said tooth bar is the benchmark oblique arrangement with said tank excessively each other;

Compared with prior art, the present invention has following advantage:

1, adopted sink structure, and made current etc. pass through tank smoothly and outwards drain, alleviated resistances such as current, and can improve mill and advance speed, reduce wearing and tearing, improve application life.

2, adopted the inner place of tank to be provided with the structure of the slurry channel that is connected with said hydrophthalmia hole; Make current etc. pass through tank and slurry channel smoothly and outwards drain simultaneously; Further alleviated the resistance that current and mud etc. form, can further improve mill and advance speed, reduce wearing and tearing, improve application life.

Description of drawings

Fig. 1 is the flat junk mill structural representation of the present invention, demonstrates tank and the slurry channel distributed architecture on the junk mill body;

Fig. 2 is the left view of Fig. 1, is to show tank 6, wolfram steel tooth 2 and tooth bar 3 isostructural sketch mapes;

Among the figure, junk mill body 1, large cylinder 1-1, small cylinder 1-2, wolfram steel tooth 2, tooth bar 3, internal thread 4, the drilling tool 5 of exerting pressure, mistake tank 6, inner 6-1, outer end 6-2, covering of the fan zone 6-3, slurry channel 7, inclination angle A, hydrophthalmia hole 8.

The specific embodiment

Further specify the specific embodiment of the present invention below in conjunction with accompanying drawing;

Referring to Fig. 1, shown in Figure 2, flat junk mill of the present invention comprises the junk mill body of being made up of large cylinder 1-1 and small cylinder 1-2 1; Be provided with wolfram steel tooth 2 and tooth bar 3 at large cylinder 1-1 end surface; On small cylinder 1-2 inner surface, be provided with internal thread 4, it is connected with the drilling tool 5 of exerting pressure, and in the cavity of large cylinder 1-1 and small cylinder 1-2, is provided with hydrophthalmia hole 8; It is characterized in that: also be provided with a tank 6 excessively on the said large cylinder 1-1 end surface at least with inner 6-1 and outer end 6-2; Its inner 6-1 is positioned near the center of said large cylinder 1-1 end surface, and outer end 6-2 is positioned at the place, outer of said large cylinder 1-1 end surface, and this crosses tank 6 can have some; As two, three, four, five; Can confirm that diameter is little then can be provided with several, diameter less and greatly then can be provided with several more, is as the criterion to guarantee result of use and enough intensity according to the size of the diameter of large cylinder 1-1 end surface; What show among Fig. 2 is three tanks 6 excessively, distributes evenly and at intervals at said large cylinder end surface.This crosses depth, width, cross sectional shape of tank 6 etc.; Also can preestablish according to the needs such as size of current and mud excretion; Its cross sectional shape can be semicircle, semiellipse, trapezoidal etc.; Also can be for rectangle etc., drain resistance can reduce current and mud, and can unobstructed drainage be as the criterion.

The said inner 6-1 place of crossing tank 6 is provided with the slurry channel 7 that is connected with said hydrophthalmia hole 8; This slurry channel 7 can be for conical, cylindrical; Perhaps elliptical cylinder-shape etc. is with convenient processing with guarantee that mud is drained smoothly and be as the criterion that slurry channel 7 is cylindrical among Fig. 2; The size of slurry channel 7 can select to confirm that the diameter of large cylinder 1-1 is then bigger when big according to the diameter of large cylinder 1-1, and is hour then less, to guarantee enough working strengths; This slurry channel 7 with cross tank 6 formation inclination angle A, its angular range between 90 degree to 175 degree, with 95 degree for preferable.Such angle can make the layout of slurry channel 7 in hydrophthalmia hole 8 more concentrated preferably; Mud can maximize through hydrophthalmia hole 8 and get into slurry channel 7; And disperse in junk mill body 1 end, mud can successfully get into tank 6 the junk chip is taken out of, and the band upper ground surface.

The said tank 6 of crossing forms covering of the fan zone 6-3 each other, and said tooth bar 3 is arranged in the covering of the fan zone evenly and at intervals, equidistantly is distributed with wolfram steel tooth 2 between the said tooth bar 3; Said tooth bar 3 is the benchmark oblique arrangement with said tank 6 excessively each other, and this reasonable distribution can make life of product increase greatly.

Claims

1. flat junk mill; Comprise the junk mill body of forming by large cylinder (1-1) and small cylinder (1-2) (1); Be provided with wolfram steel tooth (2) and tooth bar (3) at large cylinder (1-1) end surface; On small cylinder (1-2) inner surface, be provided with internal thread (4); It is connected with the drilling tool of exerting pressure (5), in the cavity of large cylinder (1-1) and small cylinder (1-2), is provided with hydrophthalmia hole (8), it is characterized in that: also be provided with a tank (6) excessively with the inner (6-1) and outer end (6-2) on said large cylinder (1-1) end surface at least.

2. flat junk mill as claimed in claim 1; It is characterized in that: said the inner (6-1) of crossing tank (6) is positioned near the center of said large cylinder (1-1) end surface, and said outer end (6-2) is positioned at the place, outer of said large cylinder (1-1) end surface.

3. flat junk mill as claimed in claim 1 is characterized in that, the said tank (6) of crossing has three, distributes evenly and at intervals at said large cylinder (1-1) end surface.

4. flat junk mill as claimed in claim 1 is characterized in that, the slurry channel (7) that is connected with said hydrophthalmia hole (8) is located to be provided with in said the inner (6-1) of tank (6) excessively, and this slurry channel (7) forms inclination angle (A) with mistake tank (6).

5. flat junk mill as claimed in claim 4 is characterized in that, said inclination angle (A) is 5 degree.

6. like each described flat junk mill in the claim 1 to 5; It is characterized in that; The said tank (6) of crossing forms covering of the fan zone (6-3) each other; Said tooth bar (3) is arranged in this covering of the fan zone (6-3) evenly and at intervals, equidistantly is distributed with wolfram steel tooth (2) between the said tooth bar (3).

7. flat junk mill as claimed in claim 6 is characterized in that, said tooth bar (3) is the benchmark oblique arrangement with said tank (6) excessively each other.