Rolling gauge protection PDC drill bit

Abstract

The rolling gauge protection PDC drill bit comprises a drill bit screw thread, a drill bit body is arranged at the top of the drill bit screw thread, a crown part is arranged at the top of the drill bit body, a plurality of drill bit blades are arranged on the side face of the drill bit body, and a tooth support is arranged at the top of the crown part. The center water holes are formed in the drill bit screw thread, the drill bit body and the crown part respectively, and a plurality of water holes are formed in the top of the crown part. According to the PDC drill bit with the rolling gauge protection, the drill bit blades, the pin columns, the polycrystalline diamond blocks, the reverse cutting teeth, the first main cutting teeth, the second main cutting teeth, the main cutting teeth and other structures are matched with one another, when the PDC drill bit is used, the gauge protection capacity of the drill bit can be effectively improved, the service life of the drill bit is prolonged, resistance of the gauge protection section of the drill bit is reduced, and the service life of the drill bit is prolonged. The drill bit is convenient to replace, the service life of the drill bit is prolonged, the drilling efficiency is improved, and the drilling cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mine drilling equipment, in particular to a PDC bit with rolling gauge protection. Background Technique

[0002] In drilling engineering such as oil, natural gas, and geological exploration, the bit is a key tool for rock breaking and drilling. PDC (Polycrystalline Diamond Compact) bits have become an important choice in current drilling operations due to their high cutting performance, long service life, and good drilling stability.

[0003] In directional drilling, technology and practice require drilling stability, drilling speed, steerability, durability, and wellbore quality. The design and configuration of the gauge protection of PDC bits directly affect the stability, steerability, and wellbore quality of the bits. There are three existing gauge protection methods for PDC bits: one is to use hard alloy for gauge protection, which is suitable for use in soft formations and has a low cost, but in slightly harder formations or abrasive formations, this gauge protection method is prone to wear and cause bit diameter reduction; the second gauge protection method is polycrystalline diamond gauge protection, which is suitable for use on sintered bits and is not very suitable for steel body bits, and if this gauge protection is damaged, it is not beneficial to the bit; the third gauge protection method is PDC composite sheet gauge protection. For the above three gauge protection forms, if it is necessary to increase the gauge protection strength, only by increasing the gauge protection width or gauge protection length, the resistance during the bit drilling process will increase, the drilling efficiency will decrease, and the directional effect will also decrease.

[0004] Therefore, it is necessary to provide a PDC bit with rolling gauge protection to solve the above technical problems. Content of the Utility Model

[0005] The utility model provides a PDC bit with rolling gauge protection, which solves the problems of increased resistance, reduced drilling efficiency, and reduced directional effect during the drilling process.

[0006] To solve the above technical problems, a PDC bit with rolling gauge protection provided by the utility model includes:

[0007] A bit thread, a bit body is provided at the top of the bit thread, a crown is provided at the top of the bit body, a plurality of bit blades are provided on the side of the bit body, and a tooth support is provided at the top of the crown;

[0008] A central water hole, the central water hole is respectively opened inside the bit thread, the bit body, and the crown, and a plurality of water eyes are opened at the top of the crown;

[0009] Multiple pin columns, multiple of the pin columns are respectively arranged inside multiple drill bit blades, and polycrystalline diamond blocks are rotatably connected to the outer side surfaces of multiple the pin columns;

[0010] Multiple back-cutting teeth, multiple of the back-cutting teeth are respectively arranged on the side surfaces of multiple the drill bit blades, and a first main cutting tooth, a second main cutting tooth and a main cutting tooth are further arranged on the top of multiple the drill bit blades.

[0011] Preferably, a drill bit shackle is opened at the bottom of one side of the drill bit body, and transition bodies are arranged at the bottoms of multiple the drill bit blades.

[0012] Preferably, a chip removal groove is arranged between two adjacent drill bit blades.

[0013] Preferably, the interiors of multiple water holes communicate with the interior of the central water hole.

[0014] Preferably, the first main cutting tooth is arranged on the top of the back-cutting tooth, the second main cutting tooth is arranged on the top of the first main cutting tooth, and the main cutting tooth is arranged on one side of the second main cutting tooth.

[0015] Preferably, threaded holes are opened at the bottoms of multiple the drill bit blades, grooves are opened at the bottoms of multiple the pin columns, and a rotating disc is rotatably connected to the inner side surface of the groove.

[0016] Preferably, a locking screw is arranged on the inner side surface of the threaded hole, and the top of the locking screw abuts against the bottom of the rotating disc.

[0017] Compared with the related art, a rolling gauge protection PDC drill bit provided by the present utility model has the following beneficial effects:

[0018] The present utility model provides a rolling gauge protection PDC drill bit. Through the cooperation of structures such as drill bit blades, pin columns, polycrystalline diamond blocks, back-cutting teeth, a first main cutting tooth, a second main cutting tooth and a main cutting tooth, when in use, the gauge protection ability of the drill bit can be effectively improved, the service life of the drill bit can be increased, the resistance of the gauge protection section of the drill bit can be reduced, drilling accidents such as drill bit sticking can be prevented, replacement is convenient, the service life and drilling efficiency of the drill bit can be improved, and the drilling cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a first embodiment of a rolling gauge protection PDC drill bit provided by the present utility model;

[0020] Figure 2 is Figure 1 a schematic diagram of the drill bit thread structure shown;

[0021] Figure 3 is Figure 1Schematic diagram of the structure of a polycrystalline diamond compact

[0022] Figure 4 is Figure 3 Schematic diagram of the cross-sectional structure of the polycrystalline diamond compact shown;

[0023] Figure 5 Schematic diagram of the structure of the second embodiment of a rolling gauge-keeping PDC bit provided by the present invention;

[0024] Figure 6 is Figure 5 Schematic diagram of the threaded hole structure shown;

[0025] Figure 7 is Figure 6 Schematic diagram of the cross-sectional structure of the cutting column shown.

[0026] Reference numerals in the figure: 11, bit thread; 12, bit body; 13, bit blade; 14, bit shackle; 15, transition body; 16, crown; 17, chip groove; 18, tooth carrier; 21, central water hole; 22, water eye; 31, pin column; 32, polycrystalline diamond compact; 41, back-cutting tooth; 42, first main cutting tooth; 43, second main cutting tooth; 44, main cutting tooth; 5, threaded hole; 51, locking screw; 52, groove; 53, rotating disc. Detailed implementation manners

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] First embodiment

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , wherein Figure 1 Schematic diagram of the structure of the first embodiment of a rolling gauge-keeping PDC bit provided by the present invention; Figure 2 is Figure 1 Schematic diagram of the bit thread structure shown; Figure 3 is Figure 1 Schematic diagram of the structure of the polycrystalline diamond compact shown; Figure 4 is Figure 3 Schematic diagram of the cross-sectional structure of the polycrystalline diamond compact shown. A rolling gauge-keeping PDC bit includes: a bit thread 11, a bit body 12 is provided at the top of the bit thread 11, a crown 16 is provided at the top of the bit body 12, a plurality of bit blades 13 are provided on the side of the bit body 12, and a tooth carrier 18 is provided at the top of the crown 16;

[0030] A central water hole 21 is respectively opened inside the drill bit thread 11, the drill bit body 12 and the crown 16, and a plurality of water eyes 22 are opened at the top of the crown 16;

[0031] A plurality of pin posts 31 are respectively arranged inside a plurality of drill bit blades 13, and polycrystalline diamond blocks 32 are rotatably connected to the outer sides of the plurality of pin posts 31;

[0032] A plurality of back cut teeth 41 are respectively arranged on the sides of a plurality of drill bit blades 13, and a first main cut tooth 42, a second main cut tooth 43 and a main cutting tooth 44 are further arranged at the tops of the plurality of drill bit blades 13.

[0033] A drill bit shackle 14 is opened at the bottom of one side of the drill bit body 12, and transition bodies 15 are arranged at the bottoms of the plurality of drill bit blades 13.

[0034] A chip removal groove 17 is arranged between two adjacent drill bit blades 13.

[0035] The interiors of the plurality of water eyes 22 communicate with the interior of the central water hole 21.

[0036] The first main cut tooth 42 is arranged at the top of the back cut tooth 41, the second main cut tooth 43 is arranged at the top of the first main cut tooth 42, and the main cutting tooth 44 is arranged on one side of the second main cut tooth 43.

[0037] The drill bit blade 13 belongs to the drill bit guiding part and adopts polycrystalline diamond blocks 32, and the polycrystalline diamond blocks 32 are connected to the drill bit body 102 by pin posts 31; 19 main cutting teeth 44 are provided at the edge of the outer wall of the crown 16, and 16 main cut teeth 43 and 13 main cut teeth (402) are densely arranged in a staggered manner, and back cut teeth 41 are arranged on the same side of the main cut teeth;

[0038] The drill bit shackle 14 is far from the drill bit body 12 and the drill bit thread 11; each water eye 22 communicates with the central water hole 21, and the central axis of each water eye 22 forms an acute angle with the central axis of the central water hole 21; the cutting heights of the 19 / 16 main cutting teeth 44 and the 16 / 13 main cut teeth 43, and the tooth support 18 behind the teeth can protect the composite chips; the tooth support 18 and the crown 16 are integral.

[0039] The working principle of a rolling gauge-keeping PDC drill bit provided by the present utility model is as follows:

[0040] The drill bit is integrally composed of a crown 16, a transition body 15, a drill bit shackle 14, drill bit blades 13, a drill bit body 12, and a drill bit thread 11. The crown 16 is connected to the drill bit blades 13, the drill bit blades 13 are connected to the transition body 15, the transition body 15, the drill bit shackle 14 are connected to the drill bit body (102), the drill bit body 12 is connected to the drill bit thread section 11. A central water hole 21 and six water eyes 22 are provided in the crown 16, the transition body 15, the drill bit shackle 14, the drill bit blades 13, the drill bit body 12, and the drill bit thread 11;

[0041] Five drill bit blades 13 are distributed on the outer wall of the drill bit body 12. A plurality of 19 / 16 primary cutting teeth 44, 16 / 13 primary cutting teeth 43, and 13 / 08 primary cutting teeth 42 are provided at the edge of the outer wall of the crown 16 on each drill bit blade 13. A 13 / 05 back cutting tooth 41 is provided at one side edge of the outer wall of the transition body 15 section on each drill bit blade 13;

[0042] A chip removal groove 17 is provided between two adjacent drill bit blades 13, and a polycrystalline diamond block 32 is provided inside the drill bit blade 13.

[0043] Compared with the related art, a rolling gauge protection PDC drill bit provided by the present utility model has the following beneficial effects:

[0044] Through the cooperation of structures such as the drill bit blade 13, the pin 31, the polycrystalline diamond block 32, the back cutting tooth 41, the first primary cutting tooth 42, the second primary cutting tooth 43, and the primary cutting tooth 44, when in use, it can effectively improve the gauge protection ability of the drill bit, increase the service life of the drill bit, reduce the resistance of the gauge protection section of the drill bit, prevent drilling accidents such as drill bit sticking, facilitate replacement, improve the service life and drilling efficiency of the drill bit, and reduce the drilling cost.

[0045] Second Embodiment

[0046] Please refer to Figure 5 、 Figure 6 and Figure 7 Based on a rolling gauge protection PDC drill bit provided in the first embodiment of the present application, the second embodiment of the present application proposes another rolling gauge protection PDC drill bit. The second embodiment is only a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0047] Specifically, the difference of a rolling gauge protection PDC drill bit provided in the second embodiment of the present application is that for a rolling gauge protection PDC drill bit, threaded holes 5 are provided at the bottoms of a plurality of the drill bit blades 13, grooves 52 are provided at the bottoms of a plurality of the pins 31, and a rotating disk 53 is rotatably connected to the inner side surface of the groove 52.

[0048] A locking screw 51 is provided on the inner side of the threaded hole 5, and the top of the locking screw 51 abuts against the bottom of the rotating disc 53.

[0049] The working principle of a rolling gauge-keeping PDC bit provided by the present utility model is as follows:

[0050] After long-term use, when the polycrystalline diamond compact 32 needs to be replaced, the user can rotate the locking screw 51 so that the locking screw 51 is threadedly connected to the inner side of the threaded hole 5, thereby moving the top of the locking screw 51 out of the inner side of the groove 52. Then the user can remove the pin 31 from the inner side of the drill bit blade 13, and then replace the polycrystalline diamond compact 32.

[0051] Compared with the related art, a rolling gauge-keeping PDC bit provided by the present utility model has the following beneficial effects:

[0052] By threadedly connecting the locking screw 51 to the inner side of the threaded hole 5 and then making the top of the locking screw 51 abut tightly against the inner side of the rotating disc 53, the top of the pin 31 abuts against the inner side of the positioning hole inside the drill bit blade 13, thereby installing the pin 31. In this way, it is convenient for the user to replace the polycrystalline diamond compact 32.

[0053] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.

Claims

1. A rolling gauge-keeping PDC bit, characterized in that, Comprising: A drill bit thread, a drill bit body is provided at the top of the drill bit thread, a crown is provided at the top of the drill bit body, a plurality of drill bit blades are provided on the side of the drill bit body, and a tooth carrier is provided at the top of the crown; A central water hole, the central water hole is respectively opened inside the drill bit thread, the drill bit body and the crown, and a plurality of water eyes are opened at the top of the crown; A plurality of pin posts, the plurality of pin posts are respectively arranged inside the plurality of drill bit blades, and polycrystalline diamond blocks are rotatably connected to the outer sides of the plurality of pin posts; A plurality of back-cut teeth, the plurality of back-cut teeth are respectively arranged on the sides of the plurality of drill bit blades, and a first main cutting tooth, a second main cutting tooth and a main cutting tooth are further provided at the tops of the plurality of drill bit blades.

2. The rolling gauge-holding PDC bit according to claim 1, wherein A drill bit release is opened at the bottom on one side of the drill bit body, and a transition body is provided at the bottom of each of the plurality of drill bit blades.

3. The PDC bit with rolling gauge protection according to claim 2, wherein A chip discharge groove is provided between two adjacent drill bit blades.

4. The PDC bit with rolling gauge protection according to claim 3, wherein The interiors of the plurality of water eyes communicate with the interior of the central water hole.

5. A rolling gauge-holding PDC bit according to claim 4, wherein The first main cutting tooth is provided at the top of the back-cut tooth, the second main cutting tooth is provided at the top of the first main cutting tooth, and the main cutting tooth is provided on one side of the second main cutting tooth.

6. The PDC bit with rolling gauge protection according to claim 1, wherein Threaded holes are opened at the bottoms of the plurality of drill bit blades, grooves are opened at the bottoms of the plurality of pin posts, and a rotating disc is rotatably connected to the inner side of the groove.

7. A PDC bit with rolling gauge protection according to claim 6, characterized in that, A locking screw is provided on the inner side of the threaded hole, and the top of the locking screw abuts against the bottom of the rotating disc.

Images