CN203515331U

CN203515331U - PDC (polycrystalline diamond compact) drill bit with special gauge protection

Info

Publication number: CN203515331U
Application number: CN201320670208.5U
Authority: CN
Inventors: 王书桂; 任志坤; 王福强; 王亮
Original assignee: Hebei Sharp Stone Drill Bit Manufacturing Co Ltd
Current assignee: Hebei Sharp Stone Drill Bit Manufacturing Co Ltd
Priority date: 2013-10-24
Filing date: 2013-10-24
Publication date: 2014-04-02
Anticipated expiration: 2023-10-24

Abstract

The utility model relates to a PDC (polycrystalline diamond compact) drill bit with special gauge protection. The PDC drill bit is characterized in that the edge of the outermost side of perpendicular projection of each main cutter wing exceeds the outermost peripheral side of a drill bit matrix and is radially and outwardly protruded, PDC cutting teeth arranged on each main cutter wing radially extend towards the central axis of the drill bit matrix at certain curvature radiuses, and the curvature radiuses corresponding to the PDC cutting teeth arranged on each main cutter wing are sequentially increased along the anticlockwise direction of the central axis of the drill bit matrix. The PDC drill bit has the advantages that the PDC drill bit is simple in structure and reasonable in design, is provided with the inwardly concave cutter wings, so that rock debris can be advantageously quickly separated from the PDC drill bit, the PDC drill bit is rotation-resistant, the drilling speed can be increased, and the construction stability can be improved; the PDC drill bit is provided with gauge protection teeth with composite plates, and accordingly the impact resistance of the PDC drill bit can be improved; as the composite plates are high in abrasive ratio performance, the gauge protection abrasion of the PDC drill bit can be effectively suppressed when the drill bit is used for cutting pointing well walls generated by strata, and a gauge protection effect can be improved.

Description

A kind of PDC drill bit of special gauge

Technical field

The utility model relates to the technical field of PDC drill bit, especially a kind of PDC drill bit of special gauge.

Background technology

In known technical field, PDC drill bit Shi Wei China National Petroleum Corporation (CNPC), China PetroChemical Corporation, Chinese Sea Petroleum Group company carry out the important tool of oil drilling in land and ocean.Be the last century Mo high-tech product introduced of China, in the drilling well of homogeneous soft-medium hard formation, use to have that speed is fast, the life-span long, an advantage such as at the bottom of unit drilling depth cost.Domestic PDC drill produced enterprise has grasped design and fabrication technology substantially, but because scientific research drops into far away from offshore company, that develops new product is limited in one's ability, from reliability, compliance or all have larger gap with advanced international standard drilling well performance.

At present PDC drill bit creep into plasticity higher or during expansive medium ground, the external diameter of drill bit very easily weares and teares, and causes drill bit undergauge then to scrap and can not continue to creep into, and has a strong impact on the progress of engineering, increases the cost of engineering.

Utility model content

The technical problems to be solved in the utility model is: overcome the problems referred to above, a kind of PDC drill bit of special gauge is provided.

The utility model solves the technical scheme that its technical problem adopts: a kind of PDC drill bit of special gauge, comprise drill-bit installing seat and bit matrix, on the canopy of described bit matrix, rotation is distributed with many operator wings, on every operator wing, be equipped with two row PDC cutting teeths, on described bit matrix, be inlaid with a plurality of nozzles, the outermost edges of projection in vertical direction of every operator wing all exceeds the external diameter of bit matrix and is radially outwardly convex shape, and the PDC cutting teeth of arranging on the wing every operator diametrically all with certain curvature partly radially the extension of the central axis of bit matrix come, the corresponding radius of curvature of PDC cutting teeth of simultaneously arranging on every operator wing increases successively along the counter clockwise direction of the central axis of bit matrix, on the front end of every operator wing, the lower position of the canopy of bit matrix is equipped with composite sheet gauge teeth.

Further, as a kind of concrete embodiment, the quantity of the wing of operating described in the utility model is 5.

Further, as a kind of concrete embodiment, the diameter of the gauge teeth of composite sheet described in the utility model is 19mm.

The beneficial effects of the utility model are: the utility model is simple in structure, reasonable in design, adopt profile to be the wing of inner concave shape, be conducive to the quick disengaging of landwaste, possess anti-turning ability, improve drilling speed, increase the stability of construction, adopt composite sheet gauge teeth simultaneously, strengthen its impact resistance, because the wear resistance ratio performance of composite sheet is high, the cutting of the sensing borehole wall that drill bit produces on cutting stratum, gauge wearing and tearing are effectively suppressed, thereby play the effect of strengthening gauge.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is sectional view of the present utility model;

Fig. 2 is the top view of the canopy of bit matrix of the present utility model;

In figure: 1. drill-bit installing seat, 2. bit matrix, the 3. operator wing, 4.PDC cutting teeth, 5. nozzle, 6. composite sheet gauge teeth.

The specific embodiment

By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.

The preferred embodiment of the PDC drill bit of a kind of special gauge of the utility model as depicted in figs. 1 and 2, comprise drill-bit installing seat 1 and bit matrix 2, on the canopy of described bit matrix 2, rotation is distributed with many operator wings 3, on every operator wing 3, be equipped with two row PDC cutting teeths 4, on described bit matrix 2, be inlaid with a plurality of nozzles 5, the outermost edges of projection in vertical direction of every operator wing 3 all exceeds the external diameter of bit matrix 2 and is radially outwardly convex shape, and the PDC cutting teeth 4 of arranging on every operator wing 3 diametrically all with certain curvature partly radially the extension of the central axis of bit matrix 2 come, the corresponding radius of curvature of PDC cutting teeth 4 of simultaneously arranging on every operator wing 3 increases successively along the counter clockwise direction of the central axis of bit matrix 2, on the front end of every operator wing 3, the lower position of the canopy of bit matrix 2 is equipped with composite sheet gauge teeth 6.

The quantity of the described operator wing 3 is 5.

The diameter of described composite sheet gauge teeth 6 is 19mm.

The utility model is simple in structure, reasonable in design, adopts profile to be the wing of inner concave shape, be conducive to the quick disengaging of landwaste, possess anti-turning ability, improve drilling speed, increase the stability of construction, adopt composite sheet gauge teeth simultaneously, strengthen its impact resistance, because the wear resistance ratio performance of composite sheet is high, the cutting of the sensing borehole wall that drill bit produces on cutting stratum, gauge wearing and tearing are effectively suppressed, thereby play the effect of strengthening gauge.

The above-mentioned foundation desirable embodiment of the present utility model of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this utility model technological thought, carry out various change and modification completely.The technical scope of this utility model is not limited to the content on manual, must determine its technical scope according to claim scope.

Claims

1. the PDC drill bit of a special gauge, comprise drill-bit installing seat (1) and bit matrix (2), on the canopy of described bit matrix (2), rotation is distributed with many operator wings (3), on every operator wing (3), be equipped with two row PDC cutting teeths (4), on described bit matrix (2), be inlaid with a plurality of nozzles (5), it is characterized in that: the outermost edges of projection in vertical direction of every operator wing (3) all exceeds the external diameter of bit matrix (2) and is radially outwardly convex shape, and the upper PDC cutting teeth (4) of arranging of every operator wing (3) diametrically all with certain curvature partly radially the central axis of bit matrix (2) extend and come, the upper corresponding radius of curvature of PDC cutting teeth (4) of arranging of every operator wing (3) increases successively along the counter clockwise direction of the central axis of bit matrix (2) simultaneously, on the front end of every operator wing (3), the lower position of the canopy of bit matrix (2) is equipped with composite sheet gauge teeth (6).

2. the PDC drill bit of a kind of special gauge as claimed in claim 1, is characterized in that: the quantity of the described operator wing (3) is 5.

3. the PDC drill bit of a kind of special gauge as claimed in claim 1, is characterized in that: the diameter of described composite sheet gauge teeth (6) is 19mm.