CN213116225U

CN213116225U - Drag for cup formula junk mill

Info

Publication number: CN213116225U
Application number: CN202021977801.0U
Authority: CN
Inventors: 曹珍珍; 付敏清; 郭艳丽; 黄金生
Original assignee: TIANHE OIL GROUP HUIFENG PETROLEUM EQUIPMENT CO Ltd
Current assignee: TIANHE OIL GROUP HUIFENG PETROLEUM EQUIPMENT CO Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-05-04
Anticipated expiration: 2030-09-11

Abstract

A salvaging cup type milling shoe. The utility model comprises a body, wherein a straight water hole is arranged in the center of the body, the lower end of the straight water hole is communicated with an inclined water hole, the inclined water hole is communicated with a water tank on the front end surface of a grinding shoe, an internal thread connected with a drill rod is arranged at the upper end of the body, a fishing cup is arranged in the middle of the body, and the fishing cup is formed by fixedly connecting the body and an outer barrel; the lower end of the outer cylinder is fixedly connected with the body; the annular space between the middle part of the outer cylinder and the body is a fishing cup; the body excircle is provided with righting piece and supports urceolus upper end hole. The hydraulic pressure type well drilling fluid return device has the advantages that the structural design is reasonable, fine abrasive dust can return to the ground along with drilling fluid, larger debris falls into the salvaging cup and is taken out of a shaft along with the grinding shoe, the performance is stable, the operation is simple, the operation efficiency is effectively improved, and the salvaging cost is reduced.

Description

Drag for cup formula junk mill

Technical Field

The utility model relates to a milling tool that is used for handling accident in the pit among the drilling process especially relates to a drag for cup formula junk mill, belongs to oil drilling technical field.

Background

In the process of drilling and repairing a well in oil exploration and development, tools are broken and fall into the well (such as underground falling objects, namely falling fish, such as drill rods, drill collars, drill bits, oil pipes, sucker rods, fishing tools and instruments) frequently, some falling objects fall into the well and then are stuck, or the top of the fish (the top of the underground falling objects) is irregular, the falling objects cannot be fished out of the well shaft by using the fishing tools, and at the moment, the falling objects are ground by using grinding shoes and then are taken out of the well shaft through drilling fluid, so that the bottom of the well is cleaned.

At present, the underground falling objects are cleaned by adopting the grinding shoes, large fragments cannot be carried out of a shaft through slurry, the large fragments need to be fished out of the shaft through an additional fishing cup, and the method is complex in operation, low in operation efficiency and high in fishing cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the current complicated operation that exists when adopting the junk to salvage the junk in the pit of adopting the junk mill, the operating efficiency is low, salvages with high costs not enough, the utility model provides a drag for cup formula junk mill.

The utility model provides a technical scheme that its technical problem adopted is: a salvaging cup type milling shoe comprises a body, wherein a straight water hole is formed in the center of the body, the lower end of the straight water hole is communicated with an inclined water hole in a penetrating manner, the inclined water hole is communicated with a water tank on the front end face of the milling shoe, an internal thread connected with a drill rod is arranged at the upper end of the body, a salvaging cup is arranged in the middle of the body and consists of the body and an outer barrel which are fixedly connected; the lower end of the outer barrel is fixedly connected with the body; the annular space between the middle part of the outer cylinder and the body is a fishing cup; the body excircle is provided with righting piece and supports urceolus upper end hole.

Furthermore, the number of the righting blocks is 3 or more than 3, and the righting blocks are uniformly distributed along the circumference of the body.

Further, the outer barrel is provided with a radial liquid flow hole, and the liquid flow hole is used for communicating the fishing cup with the shaft.

Further, the lower end face of the body is in a strip shape and is arranged along the radial direction of the milling shoe through a hard alloy sheet I fixed by welding, and the water tank is positioned on one side of the strip-shaped hard alloy sheet I.

Still further, the quantity of carbide piece I is 2 or more than 2, and the equipartition is terminal surface under the body.

1 or more than 1 strip-shaped hard alloy piece II is arranged between every two adjacent 2 strip-shaped hard alloy pieces I along the radial direction, and the length of each strip-shaped hard alloy piece I is larger than that of each strip-shaped hard alloy piece II.

Furthermore, the hard alloy sheet I, the hard alloy sheet II and the lower end of the body are welded and fixed by high-wear-resistance welding rods.

The inclined water hole and the axis of the body form an included angle of 20-30 degrees.

The beneficial effects of the utility model are that, structural design is reasonable, can make tiny abrasive dust return ground, great piece to fall into in the junk cup and take out the pit shaft along with the junk mill along with drilling mud, stable performance, and easy operation effectively improves the operating efficiency, reduces the salvage cost.

Drawings

FIG. 1 is a schematic structural view of the cup-fishing type milling shoe of the present invention.

Fig. 2 is a bottom view of fig. 1.

In the figure: 1. the fishing cup comprises a body, 2 parts of an outer barrel, 3 parts of a centering block, 4 parts of a hard alloy sheet II, 5 parts of a hard alloy sheet I, 6 parts of an inclined water hole, 7 parts of a water tank, 8 parts of a straight water hole, 9 parts of a liquid flow hole and 10 parts of a fishing cup.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. However, it should be understood by those skilled in the art that the present invention is not limited to the specific embodiments listed, and should be included within the scope of the present invention as long as the spirit of the present invention is met.

See figure 1. The utility model discloses drag for cup formula junk mill, including body 1, urceolus 2, the center of body 1 is provided with straight water hole 8, and the lower extreme of

straight water hole

8 and 4 oblique water holes 6 run through mutually and communicate, and the contained angle of oblique water hole 6 and body 1 axis is 20~30 °; the inclined water holes 6 are respectively communicated with 4 water grooves 7 on the front end surface of the mill shoe, and the upper end of the body 1 is provided with an internal thread connected with a drill rod.

The middle part of the body 1 is provided with a fishing cup 10, and the fishing cup 10 is formed by fixedly connecting the body 1 and an outer barrel 2.

Further, the lower end of the outer cylinder 2 is fixedly connected with the body 1, preferably in a threaded connection mode; the annular space between the middle part of the outer cylinder 2 and the body 1 forms a fishing cup 10; the excircle of the body 1 is provided with a righting block 3 for supporting the upper end of the inner hole of the outer cylinder 2.

Still further, the number of the righting blocks 3 is 4, and the righting blocks are uniformly distributed along the circumference of the body 1 and used for supporting the outer barrel 2.

Further, the outer cylinder 2 is provided with a radial fluid hole 9, the fluid hole 9 communicates the fishing cup 10 with the shaft, and fluid in the fishing cup 10 can enter the shaft through the fluid hole 9 and return to the ground along with drilling fluid.

See figure 2. The lower end face of the body 1 is in a strip shape and is arranged along the radial direction of the milling shoe through a hard alloy sheet I5 fixed by welding, and the water tank 7 is positioned on one side of the strip hard alloy sheet I5. Furthermore, the number of the hard alloy sheets I is 4, and the hard alloy sheets I are uniformly distributed on the lower end face of the body 1.

Furthermore, strip-shaped hard alloy pieces II 4 are arranged between 2 adjacent strip-shaped hard alloy pieces I5 along the radial direction, and the length of each strip-shaped hard alloy piece I5 is larger than that of each strip-shaped hard alloy piece II 4, so that the work efficiency of the mill shoe can be effectively improved.

And furthermore, the hard alloy piece I5, the hard alloy piece II 4 and the lower end of the body 1 are welded and fixed by high-wear-resistance welding rods, and preferably, surfacing welding is adopted.

The utility model discloses drag for cup formula junk mill, rely on the carbide piece on its bottom surface rotatory junk grinding with in the pit under the weight effect of boring in the work. Because the outer diameters of the upper end and the lower end of the grinding shoe body 1 are larger, the annular clearance with a well hole is small, the fishing cup 10 and the outer circle of the body 1 above the fishing cup are necking necks, the diameters are smaller, and the annular clearance with the well hole is large, the flow speed of the drilling fluid at the cup mouth of the fishing cup 10 is suddenly reduced, a vortex is formed, the carrying capacity of the drilling fluid is greatly reduced, and therefore heavier broken materials in the drilling fluid fall into the fishing cup and are fished out along with the pulling of a drill; smaller debris is carried out of the wellbore by the drilling fluid, thereby achieving the purpose of cleaning the bottom of the well.

The utility model has the following characteristics

1. The fishing cup and the grinding shoe are integrally designed, so that heavy falling objects which cannot be brought out by the drilling fluid can be fished out when falling into the fishing cup and being taken out;

2. the shoe grinding and cup fishing device has the functions of grinding shoes and fishing cups, so that the cost can be saved and the working efficiency can be improved;

3. the bottom of the grinding shoe is provided with four inclined water holes forming an angle of 20-30 degrees with the axis, so that circulating drilling fluid can wash falling objects from different directions, abrasive dust can be timely and effectively washed from the top of the falling objects, secondary grinding and milling of the grinding shoe on the iron dust are reduced, the service life of the grinding shoe is prolonged, the cost is reduced, and the working efficiency is improved;

4. the bottom of the milling shoe is provided with a plurality of strip-shaped hard alloy sheets, the milling shoe is reasonable in structural design, has good cutting capacity, can mill falling objects quickly, is long in service life, reduces the time for replacing the milling shoe, and greatly improves the working efficiency.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims.

Claims

1. The utility model provides a drag for cup formula junk mill, includes the body, and the center of body is provided with straight water hole, and the lower extreme and the oblique water hole of straight water hole run through the intercommunication mutually, the basin intercommunication of terminal surface before oblique water hole and junk mill, the body upper end is provided with the internal thread of being connected with the drilling rod, characterized by:

the fishing cup is arranged in the middle of the body and consists of the body and an outer barrel which are fixedly connected;

the lower end of the outer barrel is fixedly connected with the body; the annular space between the middle part of the outer cylinder and the body is a fishing cup; the body excircle is provided with righting piece and supports urceolus upper end hole.

2. The cup scooping type milling shoe as set forth in claim 1, wherein: the number of the righting blocks is 3 or more than 3, and the righting blocks are uniformly distributed along the circumference of the body.

3. The cup scooping type milling shoe as set forth in claim 2, wherein: the outer barrel is provided with a radial liquid flow hole which communicates the fishing cup with the shaft.

4. The cup scooping type milling shoe as set forth in claim 1, wherein: the lower end face of the body is in a strip shape and is arranged along the radial direction of the milling shoe through a hard alloy sheet I fixed by welding, and the water tank is positioned on one side of the strip-shaped hard alloy sheet I.

5. The cup scooping type milling shoe as set forth in claim 4, wherein: the quantity of hard alloy piece I is 2 or more than 2, and the equipartition is terminal surface under the body.

6. The cup scooping type milling shoe as set forth in claim 5, wherein: 1 or more than 1 strip-shaped hard alloy piece II is arranged between every two adjacent 2 strip-shaped hard alloy pieces I along the radial direction, and the length of each strip-shaped hard alloy piece I is larger than that of each strip-shaped hard alloy piece II.

7. The cup scooping type milling shoe as set forth in claim 6, wherein: and the hard alloy sheet I and the hard alloy sheet II are welded and fixed with the lower end of the body by high-wear-resistance welding rods.

8. The cup scooping type milling shoe as set forth in claim 1, wherein: the inclined water hole and the axis of the body form an included angle of 20-30 degrees.