CN218177185U

CN218177185U - Milling fishing female tap

Info

Publication number: CN218177185U
Application number: CN202222272144.5U
Authority: CN
Inventors: 李勇; 邢励君; 史宏伟
Original assignee: TONGHUA CITY FORWARD PETROLEUM MACHINERY CO LTD
Current assignee: TONGHUA CITY FORWARD PETROLEUM MACHINERY CO LTD
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-30
Anticipated expiration: 2032-08-29

Abstract

The utility model relates to an oil field well workover tool technical field, the cover mills promptly and salvages female awl. The fishing nut comprises a nut tap body, wherein the upper end of the nut tap body is provided with an internal thread connected with an upper joint, and the inside of the lower end of the nut tap body is provided with a nut tap fishing screw thread. The lower end of the female cone body is connected with an inner milling and grinding shoe body through external threads, a plurality of hard alloy surfaces are arranged at intervals along the circumference in the inner milling and grinding shoe body, water grooves are formed along axial intervals, and each hard alloy surface consists of a YW2 hard alloy blade and surfacing hard alloy. The milling teeth of the milling shoe are designed into a combined method of embedding YW2 hard alloy blades, shoulders and surfacing hard alloy, a milling cutting edge is formed, the hardness of the hard alloy is 91-93HRC and is far higher than that of a fish, so that the fish top can be effectively trimmed, the fish can be conveniently led in to salvage, the fish top for trimming the fish is quick and reliable, the well repairing operation efficiency and the fishing success rate are improved, the reasonable structure is realized, the milling hardness is improved, and the purpose of good use effect is achieved.

Description

Milling fishing female tap

Technical Field

The utility model relates to an oil field well workover tool technical field, the cover mills promptly and salvages female awl.

Background

In the prior art, a fishing female cone for an oil field is a tool specially used for carrying out buckle making and fishing from the outer wall of tubular falling objects such as oil pipes, drill pipes and the like. After the female cone is sleeved in the salvaged object, proper bit pressure is applied and the drilling tool is rotated to force the salvage screw thread to extrude and bite into the outer wall of the fish to make the thread, and when the made screw thread can bear certain pulling force and torque, the method of lifting or reversing can be adopted to completely or partially salvage the object. The fishing female cone is of an integrated structure and comprises an upper connector with an internal thread at one end and a cone with an internal thread at the other end, the fishing female cone is simple in structure and single in function, and the fishing function of making a button can only be realized when the fishing female cone goes into a well every time.

When the top of the fish is bent or broken and seriously deformed, the conventional fishing female cone cannot introduce the fish, which may cause

The fishing fails. At the moment, the top of the fish needs to be repaired by adopting milling shoes, then the fishing female tap needs to be lowered, the pipe column needs to be lifted and lowered for many times, the operation time is long, the well repairing operation efficiency is low, and time and labor are wasted.

And the milling type female cone consists of a female cone and a milling shoe and is used for trimming a fish top and introducing fish. When the milling hardness of the milling teeth of the milling shoe of the milling type female cone is lower than the hardness of the fish, the top of the fish cannot be effectively repaired, and therefore fishing failure may be caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the aforesaid not enough and provide a rational in infrastructure, improve and mill the mill hardness, excellent in use effect's cover mills salvages female awl.

The technical solution of the utility model is that: the sleeve milling fishing female cone comprises a female cone body, wherein the upper end of the female cone body is provided with an internal thread connected with an upper joint, and the lower end of the female cone body is provided with a female cone fishing screw thread.

Each hard alloy surface consists of a YW2 hard alloy blade, a shoulder and a surfacing hard alloy.

The front section of the inner milling and grinding shoe body is in a horn mouth shape, and the rear section of the inner milling and grinding shoe body is in a straight section.

The utility model has the advantages that: 1. adopt and salvage box tap and milling shoe to combine, the cover mills and salvages integratively, can once transfer the tubular column, realizes milling the salvage once accomplishing to the fish cover, has improved workover efficiency. 2. The milling teeth of the milling shoe are designed into a combined method of embedding YW2 hard alloy blades, shoulders and surfacing hard alloy, a milling cutting edge is formed, the hardness of the hard alloy is 91-93HRC and is far higher than that of a fish, so that the fish top can be effectively trimmed, the fish can be conveniently led in to salvage, the fish top for trimming the fish is quick and reliable, the well repairing operation efficiency and the fishing success rate are improved, the reasonable structure is realized, the milling hardness is improved, and the purpose of good use effect is achieved.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 isbase:Sub>A schematic view of the expanded structure of fig. 1 taken along the linebase:Sub>A-base:Sub>A.

Detailed Description

Referring to fig. 1 and 2, the names of the components are as follows: the main body of the female cone 1, the inner milling shoe body 2, the water tank 3, the surfacing hard alloy 4, the YW2 hard alloy blade 5, the shoulder 6 and the fishing screw thread 7 of the female cone.

Referring to fig. 1 and 2, the milling and fishing female tap comprises a female tap body 1, wherein the upper end of the female tap body 1 is provided with an internal thread connected with an upper joint, and the lower end of the female tap body is internally provided with a female tap fishing screw thread 7. The lower end of the female cone body 1 is connected with an inner milling and grinding shoe body 2 through external threads, the front section body of the inner milling and grinding shoe body 2 is in a horn mouth shape, fish guiding is facilitated, and the rear section body is a straight section. A plurality of hard alloy surfaces are arranged at intervals along the circumference in the inner milling and grinding shoe body 2, water grooves 3 are formed along axial intervals, and each hard alloy surface consists of a YW2 hard alloy blade 5, a shoulder 6 and a surfacing hard alloy 4. The shoulder 6 is formed by processing the inner milling shoe body 2 and has the following functions: and the YW2 hard alloy blade 5 is supported, so that the blade is convenient to arrange and weld.

A shoulder 6 is milled in the inner milling and grinding shoe body 2, a YW2 hard alloy blade 5 is welded at the front end of the inner milling and grinding shoe body, and the cutting direction of a blade is the same as the rotating direction of a female cone; and (3) overlaying and welding the hard alloy 4 on the rear side of the shoulder 6 by using a 3-5MM high-efficiency hard alloy welding rod to form an overlaying and welding area of the overlaying and welding hard alloy 4, and a water tank 3 is reserved for circulating cooling liquid during milling and grinding. After the welding of the inner milling shoe is completed, the minimum drift diameter is smaller than a fishing thread big hole of the female cone body 1 (the specific size needs to be determined according to the actual fishing size of the fish), and the female cone body 1 is conveniently led in to make a buckle and salvage after being repaired.

The working principle is as follows: after this device went into the well in, rotatory tubular column, the pump cycle is driven, and the mill shoe (interior mill shoe body 2) is maintained the fish top, and the limit is rotatory to be transferred simultaneously, and female awl salvage screw 7 extrusion is eaten into the fish outer wall of falling and is made the knot, lifts to fish out the fish that falls to avoided earlier maintaining the fish top, and the brill is salvaged again, lifts many times and transfers the tubular column, has practiced thrift the well workover activity time greatly, has improved workover efficiency.

The above description is only exemplary of the present invention, and the various illustrations do not limit the essence of the present invention.

Claims

1. Cover mills and salvages female awl, including female awl body (1), female awl body (1) upper end has the internal thread of being connected with the top connection, the lower extreme the inside has female awl salvage screw thread (7), its characterized in that female awl body (1) lower extreme has interior milling and grinding shoes body (2) through threaded connection, a plurality of carbide faces have been arranged along the circumference interval in interior milling and grinding shoes body (2), basin (3) have been formed along axial interval gap, every carbide face comprises YW2 carbide blade (5) and build-up welding carbide (4).

2. The shell milling fishing mother cone according to claim 1, characterized in that each cemented carbide face consists of a YW2 cemented carbide blade (5), a shoulder (6) and a bead weld cemented carbide (4).

3. The milling and fishing female tap according to claim 1 or 2, characterized in that the front section of the inner milling and grinding shoe body (2) is bell mouth shaped, and the rear section is straight.