CN1081281C

CN1081281C - Geological cutting drill bit

Info

Publication number: CN1081281C
Application number: CN98117731A
Authority: CN
Inventors: 王培林
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-02
Filing date: 1998-09-02
Publication date: 2002-03-20
Anticipated expiration: 2018-09-02
Also published as: CN1208117A

Abstract

The present invention relates to a geological slitting drill bit, and belongs to a well drilling tool. The geological slitting drill bit is composed of a base body, wing bodies, a twist drill bit, cutters, etc. The geological slitting drill bit is characterized in that the twist drill bit and the cutters are integrated to drill; the twist drill bit is arranged at the bottommost part of the center of the base body; wing bodies are arranged on the middle upper part of the twist drill bit; each wing body is respectively and fixedly connected with the cutters. During well drilling, a small hole is drilled in the ground by the twist drill bit, and thus, a breaking opening is provided for the cutters to drill. Each cutter is regularly and fixedly connected with the wing bodies at intervals at different heights and different diameters, and thus, each cutter works under the state of easy stratum breakage. Therefore, the well drilling efficiency is obviously enhanced.

Description

Drill bit

The present invention relates to a kind of 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 the combination 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, and bit speed slows down, though this stiff rock-soil layer is not a lithosphere, do not resemble the lithosphere yet hard, but 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, has also wasted human and 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 of drilling, improve the efficient of boring the geology wellhole.

The object of the present invention is achieved like this, it is made up of matrix, wing body, spiral bit, cutting knife, and above matrix, be provided with connecting thread, the below of matrix is provided with the injection hydrophthalmia, cutting knife has the angle of wedge and angle of cutting edge, 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.

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.

Described cutting knife is that from-inner-to-outer, arrangement from bottom to top are fixed in the bottom of wing body.

Described each cutting knife is located at the bottom of wing body respectively, and the space coordinates of each cutting knife is all different, 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.

Can find out from accompanying drawing: it is mainly by matrix (1), A wing body (2), B wing body (3), fluted drill 5 parts such as head (8), secondary cutting knife (5) form, and are provided with connecting thread (13), base in the top of matrix (1) The below of body (1) is provided with sprays hydrophthalmia (4), sprays hydrophthalmia (4) during work and constantly Pressure Slurry is imported well The end, impinge upon earth strata; Cutting knife has the angle of wedge (11) and angle of cutting edge (12), and the described wing body of present embodiment is 2 Individual, be A wing body (2) and B wing body (3), A wing body (2) and B wing body (3) are distributed in fried dough twist axisymmetricly The middle and upper part of drill bit (8); The described cutting knife of present embodiment has 5, be 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 Body, spiral bit (8) be located at matrix (1) under, spiral bit (8) and the spiral bit that bores metal Structure and cutting principle are the same, bore ground with it and are easy to, and it is the most lower that it is located at center of the present invention The side, 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 breakthrough Mouthful. The middle and upper part of spiral bit (8) is provided with A wing body (2) and B wing body (3), under A wing body (2) and the B wing body (3) Be provided with 5 cutting knifes. Described 5 cutting knife be from-inner-to-outer, from bottom to top arrange be fixed in A wing body (2) and The bottom of B wing body (3) namely is connected with B cutting knife (9) and D cutting knife (10) from inside to outside in proper order under the A wing body (2), B wing body (3) is lower to being connected with in proper order outside to inside secondary cutting knife (5), C cutting knife (6) and A cutting knife (7), each cutting knife Space coordinates all not identical, the difference in height of every adjacent two cutting knifes is 1 centimetre, such as B cutting knife (9) and D cutting knife (10) difference in height is 1 centimetre, and radially potential difference is 1 centimetre, such as the radially position of C cutting knife (6) and A cutting knife (7) Difference is 1 centimetre, and namely the spacing between C cutting knife (6) and A cutting knife (7) is 1 centimetre, is the interval with the cutting knife on the wing Arrange; 5 cutting knifes and spiral bit (8) are finished the effect of cutting broken formation jointly, because each cutting knife Go up at various height, spaced being located under A wing body (2) and the B wing body (3) on the different diameters, so Stratum in the interval by 5 below A wing body (2) and the B wing body (3) mutually additional cutting and fragmentation of cutting knife, And each cutting knife all works being easy to cut under the state of broken formation, during drilling well each cutting knife be from lower and Upper, from-inner-to-outer ground cuts broken formation one by one. The order of cutting is, is the B cutting knife after A cutting knife (7) cutting (9) provide the breach, provide the breach for C cutting knife (6) after B cutting knife (9) cutting, C cutting knife (6) cutting Provide the breach for D cutting knife (10) afterwards, secondary cutting knife (5) has played the effect of trimming moment here, it Effect be that the moment sum that allows A wing body (2) upper 2 that cutting knife is produced equals 2 on the B wing body (3) cutting knife is added The moment sum that upper secondary cutting knife (5) produces. So secondary cutting knife (5) will have a small amount of cutting, the cutting output size Decide according to cutting knife long feed amount.

Claims

1, a kind of drill bit, it is by matrix (1), wing body (2,3), spiral bit (8), cutting knife (5,6,7,9,10) form, and be provided with connecting thread (13) in the top of matrix (1), the below of matrix (1) is provided with sprays hydrophthalmia (4), cutting knife (5,6,7,9,10) have the angle of wedge (11) and angle of cutting edge (12), it is characterized in that: spiral bit (8) and cutting knife (5,6,7,9,10) integrated, spiral bit (8) be located at matrix (1) under, finned body (2 is established in the middle and upper part of spiral bit (8), 3), wing body (2,3) have cutting knife (5,6,7,9,10).

2, a kind of drill bit according to claim 1, its feature also is: described wing body can be divided into 2-4, and wing body is centrosymmetric and distributes or axial symmetry is distributed in the middle and upper part of spiral bit (8).

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

4, a kind of 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.