CN217327188U

CN217327188U - Optimize mixed drill bit of cloth tooth

Info

Publication number: CN217327188U
Application number: CN202221161987.1U
Authority: CN
Inventors: 涂关富; 李宗昌; 江诗贵; 杨东泽
Original assignee: Kingdream PLC; Sinopec Oilfield Equipment Corp
Current assignee: Sinopec Oilfield Equipment Corp
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-08-30
Anticipated expiration: 2032-05-12

Abstract

The utility model relates to an optimize cloth tooth mixed drill bit, including the bit body, set up wing and nozzle on the bit body, the wing is from interior to dividing interior awl, nasal part, shoulder and the section of protecting footpath outward, has installed fixed cutting tooth on the wing, has installed the bit leg between at least two pairs of adjacent wing, and bit leg upper end and bit body interlock become integrative, and the insert gear wheel has been installed to the lower extreme of bit leg, the insert gear wheel along axial interval laid many rings of rows of teeth, every ring of rows of teeth inlays the cutting tooth along the circumference interval, the round rows of teeth that all insert gear wheels correspond forms a cutting clitellum that corresponds during operation, its characterized in that has at least one cutting clitellum on the cutting tooth profile of tooth different or/and the cutting tooth install the position different for the groove that the gear wheel cutting tooth of a cutting clitellum formed is 2 at least. The utility model discloses an optimize the cloth tooth and make the cutting hole that a cutting clitellum formed have 2 kinds at least, reduce the tooth of a cogwheel and follow old groove phenomenon, promote the cutting efficiency of drill bit, improved drilling efficiency.

Description

Optimize mixed drill bit of cloth tooth

Technical Field

The utility model relates to an optimize cloth tooth mixed drill bit that is used for oil, natural gas and geological drilling usefulness, this drill bit are applicable to in intermediate layer, soft stratum, hard stratum, contain gravel, flint tuberculosis stratum vertical well and directional well application.

Background

The mixed drill bit is formed by combining an insert cone and a PDC drill bit, has the advantages of high mechanical drilling speed of the PDC drill bit, low torque and stable drilling of the cone drill bit and has wider and wider application range. Currently, the method is mainly applied to interlayer drilling, gravel-containing stratum and directional application.

The teeth and orientations of the teeth on existing roller cone drill bits are largely the same, and during rotation of the bit, tracking occurs when the cutting teeth on the bit fall into previous grooves (pits) formed by previous cuts made by other cutting teeth. This condition creates lateral pressure on the teeth, often causing the cone to align with the previous groove. Tracking also occurs when the teeth of the heel row of one cone fall into the grooves formed by the teeth of the heel row of the other cone. Slippage is associated with tracking of the bit, which occurs when the cutting teeth encounter a portion of previously formed grooves and then slide into these previous grooves, rather than cutting into an uncut formation, thereby reducing the cutting efficiency of the bit. Chinese patent CN 207436922U discloses a hybrid drill bit, in which the alloy teeth of the same cutting zone and the gear teeth are distributed on a plurality of gear cones, but because the shapes of the gear teeth are the same, and the installation orientation angle is also the same, the phenomenon that the gear teeth follow old grooves occurs in the process that the gear cones rotate to bite into the rock during drilling, thereby reducing the cutting efficiency of the hybrid drill bit.

Disclosure of Invention

The utility model aims to solve the technical problem that not enough to above-mentioned prior art exists provides an optimize cloth tooth and mix drill bit for reduce gear wheel cutting tooth and follow old groove phenomenon, promote the cutting efficiency of drill bit.

The utility model discloses a solve the technical scheme that the problem that the aforesaid provided adopted and be: the cutting bit comprises a bit body, blades and nozzles are arranged on the bit body, the blades are divided into an inner cone, a nose part, a shoulder part and a gauge section from inside to outside, fixed cutting teeth are arranged on the blades, a bit leg is arranged between at least two pairs of adjacent blades, the upper end of the bit leg is connected with the bit body into a whole, an insert cone is arranged at the lower end of the bit leg, a plurality of circles of tooth rows are distributed on the insert cone at intervals along the axial direction, cutting teeth are embedded in each circle of tooth rows at intervals along the circumferential direction, and a corresponding cutting ring zone is formed when one circle of tooth row corresponding to all insert cones works.

According to the scheme, 2-3 cutting tooth forms are arranged on one cutting ring belt; the installation direction of the cutting teeth is 2-3 on one cutting ring belt.

According to the scheme, the number of the insert cones is 2-3, the cutting tooth profiles of the same tooth row on each insert cone are the same, and the cutting tooth profiles of the tooth rows on the same cutting ring belt on each insert cone are different from each other or at least one of the cutting tooth profiles is different from the others.

According to the scheme, the number of the inserted gear cones is 2-3, the tooth shapes of the cutting teeth distributed on each inserted gear cone are 2-3, and the tooth shapes of the cutting teeth in the same tooth row are the same or different.

According to the scheme, the number of the insert cones is 2-3, the cutting teeth of the same row on each insert cone are arranged in the same direction, and the cutting teeth of the rows on the same cutting ring belt on each insert cone are arranged in different directions or at least one cutting tooth is different from the other cutting teeth.

According to the scheme, the number of the insert cones is 2-3, the installation directions of the cutting teeth distributed on each insert cone are 2-3, and the installation directions of the cutting teeth of the same tooth row are the same or different.

According to the scheme, the tooth shape of the cutting tooth is a wedge-shaped tooth, a spoon-shaped tooth or a cone-sphere tooth.

According to the scheme, the cutting teeth are hard alloy teeth or polycrystalline diamond composite teeth.

According to the scheme, the number of the blades is 2-6, the number of the cones is 2-3, and the number of the cones is equal to or less than the number of the blades.

The beneficial effects of the utility model reside in that: 1. the tooth distribution is optimized to ensure that the tooth types or the installation angles of the gear cutting teeth of one cutting ring belt are different, so that at least 2 cutting pits formed by the gear cutting teeth impacting the stratum are formed, the phenomenon that the tooth of the gear follows the old groove is reduced, the cutting efficiency of the drill bit is improved, and the drilling efficiency is improved. 2. The cutting ring belt tooth teeth are distributed on different roller cones, when a single roller cone fails due to other factors, other roller cones continue to protect the PDC composite sheet of the fixed cutting teeth, failure expansion is prevented, and therefore the service life of the hybrid drill bit is prolonged. Simultaneously, the number of the tooth rows of a single cone is large, the stress of the cone is uniform, and the service life of the cone is prolonged.

Drawings

Fig. 1 is a bottom view of an embodiment of the present invention.

Fig. 2 is a perspective view of the structure of fig. 1 when it is inverted.

Fig. 3 is a bottom view of a second embodiment of the present invention.

Fig. 4 is a bottom view of a third embodiment of the present invention.

Fig. 5 is a bottom view of a fourth embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the following examples and drawings.

1-2, a hybrid drill bit is provided that includes a bit body 101 having 4 blades 102 and 6 nozzles 103; the blade is divided into an inner cone, a nose part, a shoulder part and a gauge section from inside to outside, each part of the blade is provided with a fixed cutting tooth 104 which is a diamond compact, and the fixed cutting tooth 104 of the drill blade covers the whole shaft bottom from inside to outside. Bit legs are arranged between two pairs of blades which are adjacent in the circumferential direction and have larger intervals, the number of the arranged bit legs 106 is 2, and 2

insert cones

105 and 107 are arranged at the lower ends of the 2 bit legs. The first cone 105 is provided with 6 circles of tooth rows at intervals along the axial direction, cutting teeth are embedded in each circle of tooth row at intervals along the circumferential direction, the cutting teeth are hard alloy teeth, the tooth rows of the cone are arranged from the maximum position to the minimum position in the radial direction at intervals and are respectively 1 tooth row, 2 tooth rows and 3 to 6 tooth rows, wherein the cutting teeth 110 of the 1-2 tooth rows and the cutting teeth 108 of the 3-6 tooth rows have the same tooth form and are cone spherical teeth; the arrangement of the row structure and the cutting teeth of the second cone 107 is the same as that of the first cone 105, 6 circles of rows are also arranged, the tooth form of the cutting teeth 111 of the rows of teeth 1-2 of the cones is cone spherical teeth, the tooth form of the cutting teeth is the same as that of the corresponding row of teeth of the first cone, the tooth form of the cutting teeth 109 of the rows of teeth 3-6 of the second cone is wedge-shaped teeth, and the installation directions (the angles of cutting edges relative to the cones) of the cutting teeth of each circle of rows are the same. When the mixed drill bit moves at the bottom of the well, 2 gear rows have the same radial track at the bottom of the well, a corresponding cutting ring zone is formed when a circle of gear rows corresponding to the 2 gears works, and tooth pits formed on the cutting ring zone by two gears of 3-6 gear rows have different shapes, so that the phenomenon of old groove circulation can be reduced, and the cutting efficiency is improved.

The second embodiment of the present invention is shown in fig. 3, and the main differences from the first embodiment are: the tooth forms of 1-2 tooth rows of cutting

teeth

206 and 209 of two

cones

205 and 208 are cone spherical teeth, the cutting teeth of 3-6 tooth rows of the two cones are wedge-shaped teeth, but the installation orientations of the

cutting teeth

207 and 210 of 3-6 tooth rows of the two cones are different, wherein the wedge-shaped surfaces of the 3-6 tooth rows of the first cone are the same in installation orientation, the wedge-shaped surfaces of the wedge-shaped teeth are 45 degrees to the left relative to the cone axis, the wedge-shaped surfaces of the 3-6 tooth rows of the second cone are the same in installation orientation, the wedge-shaped surfaces of the wedge-shaped teeth are 45 degrees to the right relative to the cone axis, and the wedge-shaped surfaces of the 3-6 tooth rows of the two cones are perpendicular to each other at an angle of 90 degrees. The rest of the structure is the same as the first embodiment.

A third embodiment of the present invention is shown in fig. 4, and the main difference from the second embodiment is that: the teeth of 1-2 rows of cutting

teeth

306 and 310 of the two

cones

305 and 309 are cone spherical teeth, the teeth of 3-6 rows of cutting teeth of the two cones are wedge-shaped teeth, wherein the installation direction of each circle of cutting teeth in the 3-6 rows of the first cone is 2, the installation directions of adjacent teeth of the same row are different, the wedge face of the wedge-shaped tooth 307 deviates 45 degrees from the right relative to the axis of the cone, the wedge face of the adjacent wedge-shaped tooth 308 deviates 45 degrees from the left relative to the axis of the cone, and the installation direction of the wedge faces of the adjacent two wedge-shaped teeth of the same row is 90 degrees vertical. The second cone tooth row and the tooth arrangement structure are the same as the first cone, the installation direction of each circle of cutting teeth in the 3-6 tooth rows is 2, the wedge surface of the wedge-shaped tooth 311 deviates 45 degrees from the left of the cone axis, the wedge surface of the adjacent wedge-shaped tooth 312 deviates 45 degrees from the right of the cone axis, namely the installation directions of the adjacent teeth in the same tooth row are different. The fourth embodiment of the present invention is shown in fig. 5, and the main differences from the first embodiment are as follows: the structure of the first cone 405 is the same as that of the first cone, 6 circles of tooth rows are distributed at intervals along the axial direction, wherein the cutting teeth 406 of 1-2 tooth rows are the same as the cutting teeth 407 of 3-6 tooth rows in tooth shape, and are cone spherical teeth; the tooth row and tooth arrangement structure of the second cone 408 is the same as that of the cone in the third embodiment, that is, the tooth form of the cutting teeth 411 of the tooth rows of the second cone 1-2 is a cone ball tooth, the cutting teeth of the tooth rows of 3-6 are wedge-shaped teeth, wherein the installation direction of the cutting teeth of each circle of the tooth rows of 3-6 tooth rows is 2, the installation directions of the adjacent teeth of the same tooth row are different, the wedge surface of the wedge-shaped tooth 409 deviates 45 degrees from the cone axis, the wedge surface of the adjacent wedge-shaped tooth 410 deviates 45 degrees from the right relative to the cone axis, and the installation direction of the wedge surfaces of the adjacent two wedge-shaped teeth of the same tooth row is perpendicular to 90 degrees.

Claims

1. A mixed drill bit with optimized tooth distribution comprises a drill bit body, wherein blades and nozzles are arranged on the drill bit body, the blades are divided into an inner cone, a nose part, a shoulder part and a diameter protection section from inside to outside, fixed cutting teeth are arranged on the blades, a tooth leg is arranged between at least two pairs of adjacent blades, the upper end of the tooth leg is connected with the drill bit body into a whole, an insert cone is arranged at the lower end of the tooth leg, a plurality of circles of tooth rows are distributed on the insert cone at intervals along the axial direction, cutting teeth are embedded in each circle of tooth row at intervals along the circumferential direction, and a corresponding cutting ring zone is formed when one circle of tooth row corresponding to all insert cones works.

2. The optimized tooth layout hybrid drill bit of claim 1, wherein said cutting tooth profiles are 2-3 in a cutting annulus; the installation direction of the cutting teeth is 2-3 on one cutting ring belt.

3. The optimized tooth distribution hybrid drill bit according to claim 1 or 2, wherein the number of the insert cones is 2-3, the teeth of the cutting teeth in the same row on each insert cone are the same, and the teeth of the cutting teeth in the rows on the same cutting ring belt on each insert cone are different from each other, or at least one of the teeth is different from the others.

4. The optimized tooth distribution hybrid drill bit according to claim 1 or 2, wherein the number of the insert cones is 2-3, the tooth profiles of the cutting teeth arranged on each insert cone are 2-3, and the tooth profiles of the cutting teeth in the same row are the same or different.

5. The optimized tooth distribution hybrid drill bit according to claim 1 or 2, wherein the number of the insert cones is 2 to 3, the cutting teeth of the same row on each insert cone are arranged in the same direction, and the cutting teeth of the rows on the same cutting ring belt on each insert cone are arranged in different directions or at least one of the cutting teeth is different from the other cutting teeth.

6. The optimized tooth distribution hybrid drill bit according to claim 1 or 2, wherein the number of the insert cones is 2-3, the installation directions of the cutting teeth arranged on each insert cone are 2-3, and the installation directions of the cutting teeth in the same row are the same or different.

7. The optimized tooth-distribution hybrid drill bit as claimed in claim 1 or 2, wherein the cutting teeth are wedge-shaped teeth, spoon-shaped teeth or cone-shaped teeth.

8. The optimized tooth distribution hybrid drill bit as claimed in claim 7, wherein said cutting teeth are cemented carbide teeth or polycrystalline diamond compact teeth.

9. The optimized tooth distribution hybrid bit according to claim 1 or 2, wherein the number of the blades is 2-6, the number of the cones is 2-3, and the number of the cones is equal to or less than the number of the blades.