CN216665546U

CN216665546U - Novel grinding, milling, expanding and fishing tool

Info

Publication number: CN216665546U
Application number: CN202123417945.8U
Authority: CN
Inventors: 金锋; 王彪; 张军; 杨通华; 马培林; 严锡姣; 胡磊; 宦佳美
Original assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Current assignee: Guizhou Gaofeng Petroleum Machinery Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-03
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a novel milling and expanding fishing tool which comprises an upper joint and a milling shoe body in threaded connection with the lower end of the upper joint, wherein an inner sleeve is in threaded connection with the upper joint, the lower end of the inner sleeve is in contact with the upper end of the milling shoe body, three taper dovetail grooves are uniformly distributed at the lower end of the inner wall of the inner sleeve, a taper slip is connected in each taper dovetail groove in a sliding manner, inverted teeth are uniformly distributed on the inner side of each taper slip, and a hard alloy milling shoe ring is fixedly embedded into the lower end of the milling shoe body. The utility model has the functions of milling, expanding milling and salvaging the fallen objects at the same time, and meets the purpose of realizing multiple functions by one-time well descending; the tool saves the time of the drilling tool assembly for pulling up and down the drilling tool for many times, and saves manpower and material resources.

Description

Novel grinding, milling, expanding and fishing tool

Technical Field

The utility model relates to a novel grinding, milling, expanding and fishing tool, which is used for fishing slurry inside a sleeve, the periphery of a milling and expanding pipe column and a shaft bottom pipe column after a petroleum underground pipe column is disconnected, and belongs to the technical field of oilfield underground tools.

Background

The defects of the existing sleeve milling tool mainly comprise: 1. the sleeve milling tool is lowered into the well once, the functions of milling the inner wall of the casing, expanding and milling slurry around the fish, guiding the fish to enter the tool and fishing the fallen fish cannot be simultaneously met, the function is single, the sleeve milling tool and the fishing tool need to be lowered into the well for multiple times, and a large amount of manpower and material resources are wasted; 2. the hard alloy welding part of the milling tool is easy to fall off, and the service life of the tool is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel milling and fishing expanding tool which is reliable in performance, simple to operate and high in fishing efficiency, so as to overcome the defects in the prior art.

The technical scheme of the utility model is as follows: the utility model provides a novel mill and expand instrument of salvaging, includes the last joint and threaded connection at the last grinding shoe body of last joint lower extreme, has the endotheca at last joint female connection, and the lower extreme of endotheca and the upper end contact of grinding shoe body, has three tapering dovetail at the inner wall lower extreme equipartition of endotheca, and sliding connection has the tapering slips in every tapering dovetail, has the pawl at the inboard equipartition of tapering slips, is fixed with carbide at the lower extreme embedding of grinding shoe body and grinds the shoe ring.

Furthermore, continuous hard alloy spiral ribs are welded on the outer walls of the upper joint, the shoe grinding body and the hard alloy shoe grinding ring.

Furthermore, a group of 3/4 circular arc-shaped clamping grooves are uniformly distributed at the lower end of the shoe grinding body, and a group of 3/4 circular arc-shaped clamping heads matched with the 3/4 circular arc-shaped clamping grooves are arranged at the upper end of the hard alloy shoe grinding ring.

Furthermore, the inner hole of the hard alloy shoe grinding ring is a horn-shaped hole.

Due to the adoption of the technical scheme, the utility model has the advantages that:

1. the tool has the functions of milling, expanding milling and salvaging fallen objects at the same time, and the purpose of realizing multiple functions by one-time well descending is met;

2. the tool saves the time of the drilling tool combination for pulling up and down for many times, and saves manpower and material resources;

3. the tool is a novel milling and expanding fishing tool, has great market application prospect, reliable tool performance, simple and convenient operation, is suitable for various underground operations such as well repairing, fishing and the like, and can be widely used in various domestic oil fields.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a partially expanded schematic view of a cemented carbide shoe grinding ring.

Description of the reference numerals: 1-upper joint, 2-inner sleeve, 3-taper slip, 4-shoe grinding body, 5-hard alloy shoe grinding ring, 6-pawl, 7-horn-shaped hole, 8-hard alloy spiral rib and 9-3/4 circular arc chuck.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.

The embodiment of the utility model comprises the following steps: the novel milling and expanding fishing tool is structurally schematic shown in figures 1-2 and comprises an upper connector 1 and a milling shoe body 4 which is in threaded connection with the lower end of the upper connector 1, an inner sleeve 2 is in threaded connection with the upper connector 1, the lower end of the inner sleeve 2 is in contact with the upper end of the milling shoe body 4, three taper dovetail grooves are uniformly distributed at the lower end of the inner wall of the inner sleeve 2, a taper slip 3 is connected in each taper dovetail groove in a sliding mode, inverted teeth 6 are uniformly distributed on the inner side of each taper slip 3, and a hard alloy milling shoe ring 5 is fixedly embedded in the lower end of the milling shoe body 4. The outer walls of the upper joint 1, the shoe grinding body 4 and the hard alloy shoe grinding ring 5 are welded with continuous hard alloy spiral ribs 8. A group of 3/4 circular arc-shaped clamping grooves are uniformly distributed at the lower end of the shoe grinding body 4, and a group of 3/4 circular arc-shaped clamping heads 9 matched with the 3/4 circular arc-shaped clamping grooves are arranged at the upper end of the hard alloy shoe grinding ring 5; the inner hole of the hard alloy shoe grinding ring 5 is a horn-shaped hole 7.

The working principle of the utility model is as follows: when the underground pipe column falls off, the upper joint 1 of the tool is connected with the underground drilling tool assembly, and the drilling tool is put down, because the lower pipe column is in the casing pipe and underground adhesion exists between the inner wall of the casing pipe and the pipe column, the hard alloy spiral ribs 8 on the outer wall of the tool can play a role in righting and milling the inner wall of the casing pipe in the process that the drilling tool assembly rotates and is gradually put down along the axial direction; the horn-shaped hole 7 at the lower end of the shoe grinding body 4 can play a role in expanding and milling mud around the fish and guiding the fish into a tool; when a fish gradually enters the tool, the taper slips 3 move upwards in the range of L along the taper dovetail groove on the inner wall of the inner sleeve 2, after the fish enters the tool for a distance, the tool is lifted up at the moment, the taper slips 3 slide downwards in the taper dovetail groove on the inner wall of the inner sleeve 2, the fish is tightly embraced by the inverted teeth 6 on the taper slips 3, and the fish is fished up at the moment, namely the whole working process of milling, expanding milling and fishing the fish is completed.

In conclusion, the hard alloy spiral ribs 8 are adopted on the outer wall of the sleeve, and the hard alloy spiral ribs 8 can play a role in righting and milling the inner wall of the sleeve; the end face part adopts the horn-shaped hole 7, the structure can expand the functions of milling mud around the fish and guiding the fish into the tool, and the welding part of the hard alloy shoe grinding ring 5 adopts an embedded structure, the structure can enhance the welding stability of the welding part and prevent the hard alloy shoe grinding ring 5 from falling off; the tool is internally provided with a taper slip 3 with inverted teeth 6, and the structure of the tool can effectively salvage the fallen objects at the bottom of the well. Meanwhile, when the underground pipe column in the casing is separated, the mud on the inner wall of the casing needs to be milled, expanded and milled, and the mud on the periphery of the fallen fish needs to be guided into the tool, and when the fallen fish is salvaged, the tool can enter the well once to salvage the position to work, and after the inner wall of the casing is straightened and milled, the mud on the periphery of the fallen fish is expanded and milled, and the fallen fish is guided into the tool, the fallen fish is salvaged, so that the time for the casing milling and the fishing tool to go into the well for multiple times is greatly saved, and the waste of manpower and material resources is avoided. The tool has reliable performance, simple and convenient operation, and is suitable for various underground operations such as well repair, salvage and the like.

Claims

1. The utility model provides a novel grind and mill and expand instrument of salvaging, includes top connection (1) and threaded connection at the last grinding shoe body (4) of top connection (1) lower extreme, its characterized in that: an inner sleeve (2) is connected with the upper joint (1) through internal threads, the lower end of the inner sleeve (2) is in contact with the upper end of a shoe grinding body (4), three taper dovetail grooves are uniformly distributed at the lower end of the inner wall of the inner sleeve (2), a taper slip (3) is connected in each taper dovetail groove in a sliding mode, inverted teeth (6) are uniformly distributed on the inner side of each taper slip (3), and a hard alloy shoe grinding ring (5) is fixedly embedded into the lower end of the shoe grinding body (4).

2. The novel milling and fishing tool of claim 1, characterized in that: the outer walls of the upper joint (1), the shoe grinding body (4) and the hard alloy shoe grinding ring (5) are welded with continuous hard alloy spiral ribs (8).

3. The novel milling and reaming tool as claimed in claim 1, wherein: a group of 3/4 circular arc-shaped clamping grooves are uniformly distributed at the lower end of the shoe grinding body (4), and a group of 3/4 circular arc-shaped clamping heads (9) matched with the 3/4 circular arc-shaped clamping grooves are arranged at the upper end of the hard alloy shoe grinding ring (5).

4. The novel milling and fishing tool of claim 3, characterized in that: the inner hole of the hard alloy shoe grinding ring (5) is a horn-shaped hole (7).