CN103867133A

CN103867133A - Self-sharpening artificial-diamond-impregnated bit with continuous crushing capacity

Info

Publication number: CN103867133A
Application number: CN201410116806.7A
Authority: CN
Inventors: 郑凤祥; 赵世伟; 张秀梅
Original assignee: Sinosteel Luoyang Institute of Refractories Research Co Ltd
Current assignee: Sinosteel Luoyang Institute of Refractories Research Co Ltd
Priority date: 2014-03-27
Filing date: 2014-03-27
Publication date: 2014-06-18

Abstract

The invention discloses a self-sharpening artificial-diamond-impregnated bit with continuous crushing capacity and belongs to geological prospecting coring tools. A main grinding material and auxiliary grinding materials are arranged in a matrix (1) of a matrix working layer in a bezel setting mode; the main grinding material is artificial diamond (3); the auxiliary grinding materials are brittle self-sharpening materials (2) arranged in the matrix in a bezel setting mode; each brittle self-sharpening material (2) is a breakable mixture, with certain grinding capacity, formed by one or more of silicon carbide, tungsten carbide, silicon nitride, adamantine spar and boron carbide; the brittle self-sharpening materials (2) are in any shape with edges and corners and penetrate through the whole matrix working layer. The brittle self-sharpening materials are used in cooperation with the diamond orderly to carry out crushing, separation and grinding in the drilling process and act on the lip surface of the matrix continuously and alternatively to make the diamond arranged in the matrix in a bezel setting mode exposed, and therefore the drilling efficiency of the bit is improved.

Description

A kind of keep continue breaking capacity from sharp impregnated synthetic diamond core bit

Technical field

The present invention relates to geological prospecting and get core instrument, be specifically related to a kind of keep continue breaking capacity from sharp impregnated synthetic diamond core bit.

Background technology

Impregnated with diamond geological drill bit relies on from grinding sword fractured rock, and impregnated bit carcass is used for plating diamond and connects steel body, and its task is to make the micro-dew of impregnated diamond to make it grinding rock, and can protect that diamond is unlikely to come off.In normal drilling process, tyre body abrasion should suitably be ahead of diamond, and extremely slow if carcass does not does not wear and tear or weares and teares, diamond exposure is very micro-, does not bring into play its grinding capacity, and drilling efficiency is low.If tyre body abrasion is too fast, cause the too early threshing of diamond and tipping, lose rapidly drilling ability.

In core drilling, often can run into the slipping formation of hard and compact low-abrasive, creep on this stratum, diamond bit on rock, skid not drilling depth or drilling depth extremely slow.Once generation skidding, even if this rock stratum only has several meters or tens meters also will expend the plenty of time, causes whole drilling construction cycle stretch-out, exploration cost increases.The method that at present people solve drill slipping problem while creeping into mainly contains following four kinds: 1. soft matrix drill bits method: use the carcass of not wear-resisting soft carcass as impregnated impregnated bit, but soft carcass easily weares and teares, the life-span is low.Even be out of shape and cause drill bit to use.2. at the bottom of artificial hole, throw sand polishing: but random large owing to throwing sand at the bottom of artificial hole, if shot feeding per run is too much, or throw the poor timing that sand grinds, can cause the wearing and tearing of drill bit to be accelerated, reduce bit life.3. special-shaped labial surface drill bit method.Manufacture the drill bit of special-shaped labial surface carcass.But such drill bit drilling speed after special-shaped labial surface polishes declines rapidly, and its advantage has not existed, and there is no difference with common drill bit.4. drill bit jacketed and inlaid by diamond method.This method adopts weak-wrapped technique to diamond.Drill bit easily comes off creeping into middle diamond from carcass, and wearing and tearing carcass can improve the timeliness of drill bit, but the life-span of drill bit reduces.

It is a difficult problem that the slipping formation of the hard and compact low-abrasive of extensive development creeps into always.

Summary of the invention

In order to creep into the slipping formation of hard and compact low-abrasive, improve the ability of lasting fractured rock of drill bit, improve drilling efficiency, the present invention propose a kind of keep continuing breaking capacity from sharp impregnated synthetic diamond core bit.

In the time creeping into hard formation, there is drill slipping phenomenon in drill bit, after being the adamantine wearing and tearing due to exposure, bit matrix not wearing and tearing in time makes impregnated diamond exposure, in the time that diamond puts on pressure on rock surface and is less than the compressive strength of rock stratum, just fractured rock effectively of diamond, shows as not drilling depth, skids.

Keep continue breaking capacity from a sharp impregnated synthetic diamond core bit, described drill bit comprises matrix, carcass working lining and carcass inoperative layer; Described carcass inoperative layer is used for connecting carcass working lining and matrix; In the carcass of described carcass working lining, there is main and auxiliary abrasive material; Described main abrasive material is diamond; Described auxiliary abrasive material is that the fragility that plates in carcass is from sharp material; Described fragility is one or both the easy fragmentations in carborundum, tungsten carbide, silicon nitride, corundum, boron carbide and the mixture with the abrasive material of certain grainding capacity from sharp material; Described fragility is the arbitrary shape with corner angle from sharp material, and described fragility runs through whole carcass working lining from sharp material; In the carcass of drill bit working lining, the two combination of main and auxiliary abrasive material, is improved bit performance, and improves bit life and creep into timeliness, solves " skidding " problem existing when massive and hard to grind layer creeps into.

Main abrasive material in carcass working lining is diamond, is wrapped in firmly in carcass material, is not easy to come off, as the main detritus material of drill bit working lining, in order to rock cutting.The diamond working time extends, and can greatly improve bit life.Auxiliary abrasive material in carcass working lining adopts one or both the mixture in carborundum, tungsten carbide, silicon nitride, corundum, boron carbide, is less important detritus material, mainly in order to realize carcass from sharp.In bit matrix, plate in order the fragility with corner angle from sharp material, fragility is from the orderly gold conjugate hard rock co-operation of sharp material, and auxiliary abrasive material fragility is high, and intensity is low, poor with carcass adhesion; In drilling process, auxiliary abrasive material easily comes off and enters wearing and tearing carcass at the bottom of hole from carcass material, broken-to depart from-to grind, continue alternating action in carcass labial surface, make the in good time exposure of main abrasive material and rock cutting, improve the stylish old metabolic capability of drill bit work, keep labial surface diamond reasonably to go out sword, the ability that continues fractured rock is provided.

Brief description of the drawings

Fig. 1 is the schematic diagram of the embodiment of the present invention 1 drill bit working lining.

Fig. 2 is the drawing in side sectional elevation of Fig. 1.

Fig. 3 is the schematic diagram of the embodiment of the present invention 2 drill bit working linings.

Fig. 4 is the drawing in side sectional elevation of Fig. 3.

Fig. 5 is the schematic diagram of the embodiment of the present invention 3 drill bit working linings.

Fig. 6 is the drawing in side sectional elevation of Fig. 5.

In figure, 1, carcass, 2, fragility is from sharp material, 3, diamond.

Detailed description of the invention

The present invention is illustrated in conjunction with the embodiments:

As shown in Figure 1 and Figure 2, a kind of keep continue breaking capacity from sharp impregnated synthetic diamond core bit, the agent structure of described drill bit is identical with existing synthetic diamond core bit, includes matrix, carcass working lining and carcass inoperative layer; Described carcass inoperative layer is used for connecting carcass working lining and matrix; Described carcass material is identical with the carcass material of existing synthetic diamond core bit, comprises the elements such as copper, iron, cobalt, manganese, zinc; Fig. 1, Fig. 2 only provide the signal of the carcass working lining of drill bit; In the carcass of described carcass working lining, there is main and auxiliary abrasive material; Described main abrasive material is the diamond 3 plating in carcass; Described auxiliary abrasive material is that the fragility that plates in carcass is from sharp material 2; Described fragility is one or both the easy fragmentations in carborundum, tungsten carbide, silicon nitride, corundum, boron carbide and the mixture with the abrasive material of certain grainding capacity from sharp material; Described fragility is the arbitrary shape with corner angle from sharp material, and described fragility runs through whole carcass working lining from sharp material.

Fig. 3, Fig. 4 and Fig. 5, Fig. 6 provide the signal of the distribution of main and auxiliary abrasive material in bit matrix working lining; Described fragility runs through the whole working lining of carcass from sharp material 2, fragility distributes at the interior ordered arrangement of carcass 1 from sharp material 2: fragility is that upper and lower multilayer is arranged and arranges along carcass circumference multilayer from sharp material 2 in carcass 1.

Claims

Keep continue breaking capacity from a sharp impregnated synthetic diamond core bit, described drill bit includes matrix, carcass working lining and carcass inoperative layer; Described carcass inoperative layer is used for connecting carcass working lining and matrix; It is characterized in that: in the carcass (1) of described carcass working lining, plated main and auxiliary abrasive material; Described main abrasive material is diamond (3); Described auxiliary abrasive material is that the fragility that plates in carcass is from sharp material (2); Described fragility from sharp material (2) for easily broken and there is the mixture of one or more abrasive materials in the carborundum, tungsten carbide, silicon nitride, corundum, boron carbide of certain grainding capacity; Described fragility is from sharp material (2) for having the arbitrary shape of corner angle, and described fragility runs through the whole working lining of carcass from sharp material (2).
As claimed in claim 1 a kind of keep continuing breaking capacity from sharp impregnated synthetic diamond core bit, it is characterized in that: described fragility from sharp material (2) carcass (1) in for the arrangement of upper and lower multilayer and arrange along carcass circumference multilayer.