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Bit block for PDC (polycrystalline diamond compact) bits

A drill body and drill bit technology, applied in construction and other directions, can solve problems affecting drilling speed and downhole safety, and achieve the effect of improving mud inclusion and increasing cross-sectional size

Inactive Publication Date: 2018-12-11
SICHUAN XILIN OIL SUPPLIES EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But in actual operation, the work of hydraulic equipment may affect the drilling speed and downhole safety

Method used

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  • Bit block for PDC (polycrystalline diamond compact) bits

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the drill body for the PDC drill bit includes a drill body body and a plurality of blades 2 installed on the drill body body. The blades 2 are uniformly distributed in a ring relative to the axis of the drill bit, and The bottom groove 1 located at the lower end of the drill body body is surrounded between the lower ends, and also includes a plurality of mud discharge holes 3 provided on the drill body body, the lower ends of the mud discharge holes 3 are connected to the top of the bottom groove 1, the The upper end of the mud discharge hole 3 extends to the side position of the upper end of the drill bit body.

[0020] In this scheme, the blade 2 is a part directly used on the drill body to interact with rock and soil to realize drilling. In this scheme, a plurality of blades 2 are evenly distributed in a ring and form a bottom at the lower end of the drill body. Groove 1, during the working process of the drill bit, the drilling mud produc...

Embodiment 2

[0022] Such as figure 1 As shown, this embodiment is further limited on the basis of embodiment 1: in order to avoid stress concentration on the drill bit, it is set as follows: the side surface of the drill bit body is a smooth surface.

[0023] In order to make the force on each point of the drill bit more uniform during the working process, a plurality of mud discharge holes 3 are uniformly distributed in a circular relationship with respect to the axis of the drill bit.

[0024] In order to enable the drill bit to use hydraulic equipment to realize drilling mud flushing, it is set as follows: the drill bit body is also provided with a flushing water flow channel.

[0025] As an implementation method that can use the drill pipe as the water injection flow channel, the inlet end of the flushing water flow channel is located at the upper end of the drill bit body.

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Abstract

The invention discloses a bit block for PDC (polycrystalline diamond compact) bits. The bit block includes a bit block body and a plurality of wings mounted on the bit block body; the wings are circularly and evenly distributed relative to the axis of a bit; the lower ends of the wings form a bottom groove in the lower end of the bit block body. The bit block also includes a plurality of mud discharge holes arranged in the bit block body; the lower ends of the mud discharge holes are connected with the top of the bottom groove; the upper ends of the mud discharge holes are extended to the lateral side of the upper end of the bit block body. The structural design of the bit block helps improve the mud coating condition in the operating process of a PDC bit.

Description

technical field [0001] The invention relates to the technical field of geological drilling equipment, in particular to a drill bit body for a PDC drill bit. Background technique [0002] In the prior art, the PDC bit is widely used in the oil drilling process. Since the surface of the PDC bit needs to be as clean as possible during the working process of the PDC bit, that is, the bit does not contain mud, so in the prior art, it is used as a supporting tool for the PDC bit. The hydraulic equipment of the device is the guarantee equipment for the normal operation of the PDC drill bit. [0003] But in actual operation, the work of hydraulic equipment may affect the drilling speed and downhole safety. [0004] Further optimizing the structural design of the PDC bit to improve the performance of the PDC bit is a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0005] To further optimize the structural design of the PDC bit prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/55
CPCE21B10/55
Inventor 谭逢林
Owner SICHUAN XILIN OIL SUPPLIES EQUIP
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