CN203879434U

CN203879434U - Specially-made drilling, grinding and milling tool

Info

Publication number: CN203879434U
Application number: CN201420228473.2U
Authority: CN
Inventors: 孔春岩; 张德荣; 王国军; 曾涛; 陈颖
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2014-05-07
Filing date: 2014-05-07
Publication date: 2014-10-15
Anticipated expiration: 2024-05-07

Abstract

The utility model relates to a specially-made drilling, grinding and milling tool used for petroleum engineering well drilling and well maintaining operation. The tool can tear rubber skin fast, effectively grind and mill an aluminum alloy rigid body, break cement fast, and further increase the speed of drilling, grinding and milling a rubber plug and a cement plug. According to the technical scheme, a tool body is formed by a screwed joint and a column body, four water tanks are formed in the column face of the column body, T1 type hard alloy teeth are inlaid in the end face of the column body in a staggering mode, a groove is formed in the end face of the column body, a sharp knife block is welded in the groove in an inlaid mode, T1 type hard alloy blocks are inlaid in the two end faces of the sharp knife block in a staggering mode, a special hard alloy cutting body is welded to the top of the sharp knife block in an inlaid mode, and an A1 type hard alloy block is inlaid on the column face, close to the end face, of the column body. The tool has the function of drilling, grinding and milling the rubber plug, the cement plug and an aluminum alloy, effectively solves the problems that the speed for grinding and milling a drilling plug in a tail pipe is low and the cycle is long, and saves the well drilling cost.

Description

A kind of special brill milling tool

Technical field

The utility model belongs to oil drilling and well workover engineering field downhole tool class, particularly a kind of special brill milling tool.

Background technology

In drilling liner cementing process, metering often occurs to replace to be forbidden to cause failing normal bruising, restrictive ring seal sternly not cause that cement paste returns, the little plug of drilling rod is hampered stuck or cement dodges suddenly coagulation phenomena, these all easily cause and in tail pipe, have left very long cement plug, later stage need to be lowered to drill bit again, grinds off successively little plug, large rubber plug and the cement plug of aluminum alloy material.Use common junk mill or drill bit milling rubber very slow, especially grind off after large and small plug aluminum alloy part, its acutance reduces, and later stage drilling out is slower, even needs multiple trips to change green bit, has greatly extended the completion time, has increased drilling cost.

Summary of the invention

The purpose of this utility model is: in order to meet efficient drilling milling needs in tail pipe, further save completion period, an inefficient difficult problem while solving conventional bit brill milling plug, cement plug, a kind of Novel drill milling tool that spy provides, can greatly improve and bore milling efficiency, effectively solve plug in tail pipe, cement plug and bore that milling is slow, a difficult problem for long construction period, save drilling cost.In order to achieve the above object, the utility model is by the following technical solutions: a kind of special brill milling tool, by tool body, central block, T1 type hard-metal insert, cemented carbide powder, formed, it is characterized in that: tool body consists of nipple, cylindrical body, cylindrical body cylinder is distributed with four tanks, and cylindrical body end face is inlaid with T1 type hard-metal insert; Cylindrical body end face has a groove, and in groove, welding-on has sharp knife piece, is inlaid with T1 type hard-metal insert in sharp knife piece both ends of the surface, and the top welding-on of sharp knife piece has a speciality carbide cutting body; On cylinder in cylindrical body near end face, be inlaid with A1 type hard alloy blocks; The cutting edge installation direction of all A1 type hard alloy blocks and T1 type hard-metal insert is and bores milling tool circumference cutting direction, A1 type hard alloy blocks and T1 type hard-metal insert grinningly highly all within the scope of 2.5mm negative common difference.The T1 type hard-metal insert of cylindrical body and sharp knife piece surface inserting all adopts equidistantly staggered cloth tooth gauge rule.

The beneficial effects of the utility model: (1) the utility model combines flat-bottom grind shoes with the advantage of drag bit, shearing-crushing and the flushing action to shaft bottom milling article of instrument have effectively been improved, not only can tear fast rubber, effective milling aluminum alloy rigid body, quick crashing cement, and in time by shaft bottom detritus zone from shaft bottom, further improve the speed of boring plug, cement plug, reach the construction task of boring milling plug, cement plug one time; (2) tool post body cylinder tungsten carbide button piece plays the effect of gauge.

Accompanying drawing explanation

Fig. 1 is the special brill milling tool of the utility model structural representation.

Fig. 2 is the special brill milling tool of the utility model front view.

Fig. 3 is the top view of Fig. 2.

In figure: 1-tool body, 1a-nipple, 2-cylindrical body, 2a-tank, 3-sharp knife piece, 4-A1 type hard alloy blocks, 5-T1 type hard-metal insert, 6-speciality carbide cutting body.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in more detail.

Shown in Fig. 1 and Fig. 2, process the feature of tool body 1: joint 1a, cylindrical body 2, tank 2a, and process sharp knife piece 3; As shown in Figure 3, bore equally spaced hole the end face of cylindrical body 2 and sharp knife piece 3 is staggered respectively, cylindrical body 2 is near groove milling on the cylinder of end face, T1 type hard-metal insert 5 is embedded in the hole of cylindrical body 2 and sharp knife piece 3 end faces, A1 type hard alloy blocks 4 is embedded in the groove of cylindrical body 2, its cutting edge installation direction is and bores milling tool circumference cutting direction, and it is grinningly highly all within the scope of 2.5mm negative common difference; As shown in Figure 1, at speciality carbide cutting body 6 of the top of sharp knife piece 3 welding-on; Finally by sharp knife piece 3 welding-ons of having inlayed tooth in the groove of cylindrical body 2 end faces.

During use, special brill milling tool is connected with drill string by joint 1a, then descends well construction.

Claims

1. a special brill milling tool, by tool body, central block, T1 type hard-metal insert, cemented carbide powder, formed, it is characterized in that: tool body (1) consists of nipple (1a), cylindrical body (2), cylindrical body (2) cylinder is distributed with four tanks (2a), and cylindrical body (2) end face is inlaid with T1 type hard-metal insert (5); Cylindrical body (2) end face has a groove, in groove, welding-on has sharp knife piece (3), in sharp knife piece (3) both ends of the surface, be inlaid with T1 type hard-metal insert (5), the top welding-on of sharp knife piece (3) has a speciality carbide cutting body (6); In cylindrical body (2), near on the cylinder of end face, be inlaid with A1 type hard alloy blocks (4); The cutting edge installation direction of all A1 type hard alloy blocks (4) and T1 type hard-metal insert (5) is and bores milling tool circumference cutting direction, A1 type hard alloy blocks (4) and T1 type hard-metal insert (5) grinningly highly all within the scope of 2.5mm negative common difference.

2. special brill milling tool according to claim 1, is characterized in that: the T1 type hard-metal insert (5) at above-mentioned cylindrical body (2) and sharp knife piece (3) surface inserting adopts equidistantly staggered cloth tooth gauge rule.