CN1208117A

CN1208117A - Geological cutting drill bit

Info

Publication number: CN1208117A
Application number: CN 98117731
Authority: CN
Inventors: 王培林
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-02
Filing date: 1998-09-02
Publication date: 1999-02-17
Anticipated expiration: 2018-09-02
Also published as: CN1081281C

Abstract

The cutting drill bit for well drilling consists of base body, wings, twist drill bit and cutters. It features the twist drill bit and cutter combined into one integral for combined drilling and cutting. The twist drill bit is in the lower part and the wings with fixed cutter are in the middle part. During drilling, the drill bit drills one small hole as breakthrough point and the cutters distributed regularly break stratum effectively. The said cutting drill bit has high drilling efficiency.

Description

Geological cutting drill bit

The present invention relates to a kind of geological cutting drill bit, relate to a kind of geology drill bit with metal cutter cutting principle combination utilization specifically, it is integrated with spiral bit and cutting knife, and composite drilling cutting is used for the fragmentation of creeping on stiff ground stratum, belongs to the drilling well drill bit.

At present, the geologic prospecting party of China is when drilling well, usually a kind of geology drill bit of usefulness is the three wings drag bits, with mud is circulatory mediator, drive the three wings drag bit by drilling rod, fragmentation is cut on the stratum, finish wellhole, yet when adopting this three wings drag bit to cut broken formation, it is very blunt particularly just to seem when running into stiff rock-soil layer, bit speed slows down, though this stiff rock-soil layer is not a lithosphere, do not resemble the lithosphere yet hard, bigger with this three wings drag bit drilling well difficulty.At drill diameter is 0.114 meter, when the degree of depth is 9 meters a well, expend the nearly man-hour about a hour, and drilling efficiency is very low.Adopt the three wings drag bit to cut broken stiff rock-soil layer, not only expended man-hour, also wasted power, material resources and financial resources.Its main cause is exactly in this geo-logical terrain work because of three wings drag bit incompatibility.In order to make geologic prospecting party's drilling well of in the condition of stiff rock-soil layer, constructing faster, better, more smoothly, the principle of broken formation and the cutting principle of metal cutter when the structure of consideration geology drill bit that need be fully comprehensive, drilling well, and on the geology drill bit of this form, work hard, creationaryly design a kind of geological cutting drill bit that stiff rock-soil layer creeps into that is used for.

The objective of the invention is to: design and a kind ofly collect spiral bit and cutting knife is the geological cutting drill bit of one, be beneficial to the broken stiff rock-soil layer geology of drilling, improve the efficient of boring the geology wellhole.

The object of the present invention is achieved like this, it mainly partly is made up of matrix, wing body, spiral bit, cutting knife etc., and above matrix, be provided with connecting thread, the below of matrix is provided with the injection hydrophthalmia, be provided with the angle of wedge and angle of cutting edge on cutting knife, it is characterized in that: spiral bit and cutting knife are integrated, spiral bit be located at matrix under, finned body is established in the middle and upper part of spiral bit, and wing body has cutting knife.

Its feature also is: described wing body can be 2-4, and wing body is centrosymmetric and distributes or axial symmetry is distributed in the middle and upper part, the outside of spiral bit.

Its feature also is: described cutting knife is that from-inner-to-outer, arrangement from bottom to top are fixed in the bottom of wing body.

Its feature also is: described each cutting knife is located at the bottom of wing body respectively, and the space coordinates of each cutting knife is all inequality, and the difference in height of every adjacent two cutting knifes is 0.1-10 centimetre, and radially potential difference is 0.2-10 centimetre, is set in distance with the cutting knife on the wing.

The present invention is compared with prior art: it is an one with spiral bit and cutting knife collection, spiral bit bores an aperture with the stratum earlier during drilling well, for creeping into, cutting knife provides the breach, each cutting knife is established again to go up at various height and is reached on the different diameters, spaced being fixed on the wing body clocklike,, the state work that makes each cutting knife all be in to be easy to broken formation, thereby significantly improved drilling efficiency.

Further specify the present invention below in conjunction with drawings and Examples

The scheme of embodiment described here, do not limit the present invention, one of skill in the art can make improvements and change according to spirit of the present invention, and described these improvement and variation all should be considered as within the scope of the invention, and scope and spirit of the present invention are limited by claim.

Embodiment

Fig. 1 looks schematic diagram for the overall structure master of the embodiment of the invention.

Fig. 2 is the integral right TV structure schematic diagram of the embodiment of the invention.

Fig. 3 looks the broken section structural representation for the integral right of the embodiment of the invention.

Among the figure: 1, matrix, 2, A wing body, 3, B wing body, 4, spray hydrophthalmia, 5, secondary cutting knife, 6, the C cutting knife, 7, the A cutting knife, 8, spiral bit, 9, the B cutting knife, 10, the D cutting knife, 11, the angle of wedge, 12, angle of cutting edge, 13, connecting thread.

From accompanying drawing as can be seen: it mainly is made up of matrix (1), A wing body (2), B wing body (3), spiral bit (8), secondary cutting knife parts such as (5), and be provided with connecting thread (13) in the top of matrix (1), the below of matrix (1) is provided with injection water limit (4), spray hydrophthalmia (4) during work and constantly pressure mud is imported shaft bottom, impinge upon earth strata; Be provided with the angle of wedge (11) and angle of cutting edge (12) on cutting knife, the described wing body of present embodiment is 2, is A wing body (2) and B wing body (3), and A wing body (2) and B wing body (3) are distributed in the middle and upper part of spiral bit (8) axisymmetricly; The described cutting knife of present embodiment has 5, is secondary cutting knife (5), C cutting knife (6), A cutting knife (7), B cutting knife (9), D cutting knife (10); Its structure is that spiral bit (8) and 5 is the cutting knife collection one, spiral bit (8) be located at matrix (1) under, spiral bit (8) is the same with the structure and the cutting principle of the spiral bit that bores metal, boring ground with it is easy to, it is located at below, center of the present invention, spiral bit (8) bores an aperture with the stratum earlier when boring the geology well, and creeping into for the cutting of cutting knife provides the breach.The middle and upper part of spiral bit (8) is provided with A wing body (2) and B wing body (3), and A wing body (2) and B wing body (3) have 5 cutting knifes.Described 5 is cutting knife from-inner-to-outers, arrange the bottom that is fixed in A wing body (2) and B wing body (3) from bottom to top, be to be connected with B cutting knife (9) and D cutting knife (10) under the A wing body (2) from inside to outside in proper order, B wing body (3) is down from being connected with secondary cutting knife (5) outside to inside in proper order, C cutting knife (6) and A cutting knife (7), the space coordinates of each cutting knife is all inequality, the difference in height of every adjacent two cutting knifes is 1 centimetre, difference in height as B cutting knife (9) and D cutting knife (10) is 1 centimetre, radially potential difference is 1 centimetre, radially potential difference as C cutting knife (6) and A cutting knife (7) is 1 centimetre, be that spacing between C cutting knife (6) and A cutting knife (7) is 1 centimetre, be set in distance with the cutting knife on the wing; 5 cutting knifes and spiral bit (8) are finished the effect of cutting broken formation jointly, because each cutting knife is gone up at various height, spaced being located under A wing body (2) and the B wing body (3) on the different diameters, so the stratum at interval by 5 below A wing body (2) and the B wing body (3) cutting knife additional mutually cutting and fragmentation, and each cutting knife all works being easy to cut under the state of broken formation, during drilling well each cutting knife be from bottom to top, from-inner-to-outer ground cuts broken formation one by one.The order of cutting is, A cutting knife (7) cutting back provides the breach for B cutting knife (9), B cutting knife (9) cutting back provides the breach for C cutting knife (6), C cutting knife (6) cutting back provides the breach for D cutting knife (10), secondary cutting knife (5) has played the effect of trimming moment here, and its effect is that the moment sum that allows A wing body (2) last 2 that cutting knife is produced equals the moment sum that 2 on the B wing body (3) adds cutting knife secondary cutting knife (5) generation.So secondary cutting knife (5) will have a spot of cutting, the cutting output size is decided according to cutting knife long feed amount.

Claims

1, a kind of geological cutting drill bit, it mainly partly is made up of matrix, wing body, spiral bit, cutting knife etc., and above matrix, be provided with connecting thread, the below of matrix is provided with the injection hydrophthalmia, be provided with the angle of wedge and angle of cutting edge on cutting knife, it is characterized in that: spiral bit and cutting knife are integrated, spiral bit be located at matrix under, finned body is established in the middle and upper part of spiral bit, and wing body has cutting knife.

2, a kind of geological cutting drill bit according to claim 1, its feature also is: described wing body can be 2-4, and wing body is centrosymmetric and distributes or axial symmetry is distributed in the middle and upper part of spiral bit.

3, a kind of geological cutting drill bit according to claim 1, its feature also is: described cutting knife is that from-inner-to-outer, arrangement from bottom to top are fixed in the bottom of wing body.

4, a kind of geological cutting drill bit according to claim 1, its feature also is: described each cutting knife is located at the bottom of wing body respectively, the space coordinates of each cutting knife is all inequality, the difference in height of every adjacent two cutting knifes is 0.1-10 centimetre, radially potential difference is 0.2-10 centimetre, is set in distance with the cutting knife on the wing.