CN2349344Y

CN2349344Y - High-efficient grind shoe

Info

Publication number: CN2349344Y
Application number: CN 98237437
Authority: CN
Inventors: 尹德才; 刘风梅; 王文昆
Original assignee: CHINA TONGHUA PETROLEUM TOOL Co Ltd
Current assignee: CHINA TONGHUA PETROLEUM TOOL Co Ltd
Priority date: 1998-04-24
Filing date: 1998-04-24
Publication date: 1999-11-17
Anticipated expiration: 2008-04-24

Abstract

The utility model discloses a well repair tool for an oil field, namely a high-efficient grind shoe. The utility model is composed of a rod body with changed diameters, four blocks of knife plate bodies which are inserted and welded on the end face with changed diameters and are in cross arrangement and hard alloy blocks which are provided with cutting edges and are densely arranged on the knife plate bodies. The utility model has the advantages that drilling pressure is low, and the work efficiency can be increased by four to five timers.

Description

Efficient milling shoes

The utility model is a kind of oil field workover tool, promptly is used to remove the useless pipe of oil well casing internal memory, the efficient milling shoes of drilling rod.

In existing technology, be at shaft-like body front end hardfacing alloy head as the junk mill of workover tool, be the almost plane end.In the use, in sleeve pipe, utilize the junk mill of rotation to grind off remaining pipe, bar thing in the sleeve pipe.Its shortcoming is that grinding speed is slow, the pressure of the drill is big, efficient is low.

The utility model purpose is that provide a kind of at above-mentioned deficiency be working method, the efficient milling shoes that improves work efficiency with the milling.

Efficient milling shoes is made of the reducing body of rod, hard alloy blocks, horizontal at least two above knife plates that protrusion is arranged on body of rod reducing end face, and solid matter has the hard alloy blocks of band cutting edge on the knife plate plate face.

It is scraping that the utility model advantage is to change grinding in the past, can improve milling speed, reduces the pressure of the drill, improves work efficiency 4-5 doubly.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1 is the efficient milling shoes structure diagram

Fig. 2 is the left view of Fig. 1

Referring to Fig. 1, the efficient milling shoes body is a reducing bar, comprises thick section 1 and thin segment 2.

Referring to Fig. 2, on the reducing end face, insert to be welded with four knife plates 3 and to be cross and arrange along the reducing end.Solid matter has the hard alloy blocks 4 that has cutting edge on the every knife plate 3, and formed hard alloy blocks basal plane is crossed the center of circle, only is subjected to normal pressure so that mill thing during milling, reduces the pressure of the drill, and is laborsaving.Adopt and insert the promptly convenient processing of weldering knife plate 3, be beneficial to welding hard alloy blocks 4 again.Certainly knife plate 3 also can be along uniform three, five, six of circumferential end surfaces etc.Hard alloy blocks 4 is a short cylindrical shape, and has the arc milling sword along circumference, does not have the dead angle when shelling so that cut.In four knife plates 3, hard alloy blocks 4 is arranged identical on the knife plate 3 of center of circle symmetry relatively.In the adjacent knife plate 3, first to arrange the hard alloy blocks of being arranged 4 identical on second row institute's hard alloy blocks of arrange 4 and the last knife plate 3 on second knife plate 3, with the assurance milling.

During use, drilling rod drives the junk mill rotation, and when touching the useless pipe that needs to remove, thin segment 2 inserts in the useless pipe and can locate, and knife plate 3 touches when giving up the pipe end face, and it is carried out milling, and its broken cutting by water under high pressure is taken out of, realizes efficient well workover.

Claims

1, a kind of efficient milling shoes comprises the reducing body of rod, hard alloy blocks, it is characterized in that horizontal at least two above knife plates that protrusion is arranged on body of rod reducing end face, and solid matter has the hard alloy blocks of band bite on the knife plate plate face.

2,, it is characterized in that knife plate is four, is cross along the reducing end and arranges according to the described efficient milling shoes of claim 1.

3,, it is characterized in that the hard alloy blocks basal plane of each solid matter is crossed the center of circle according to claim 1 or 2 described efficient milling shoes.

4,, it is characterized in that knife plate is inserted to be welded on the reducing end face according to the described efficient milling shoes of claim 3.

5,, it is characterized in that described hard alloy blocks is short garden cylindricality, and have the arc milling cutter along circumference according to the described efficient milling shoes of claim 4.