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PDC ( polycrystalline diamond compact ) drill bit convenient for mud discharge

A convenient, drill-bit technology, used in drill bits, earth-moving drilling, drilling equipment, etc., can solve problems affecting drilling speed and downhole safety, and achieve the effect of improving the mud-packing situation and increasing the 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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  • PDC ( polycrystalline diamond compact ) drill bit convenient for mud discharge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a PDC drill bit convenient for mud discharge includes an upper connecting handle 1 and a drilling part connected to the lower end of the connecting handle 1. The drilling part is provided with a plurality of blades 2, and the blades 2 are connected to each other. They are evenly distributed in a ring with respect to the axis of the connecting handle 1, and the bottom groove 4 at the lower end of the drilling part is surrounded between the lower ends of the blades 2, and a plurality of mud discharge holes 3 are provided on the drilling part. The lower end of the mud discharge hole 3 is in contact with the top of the bottom groove 4, and the upper end of the mud discharge hole 3 extends to the joint position between the connecting handle 1 and the drilling part.

[0020] In this solution, the blade 2 is a part directly used on the drilling part to interact with rock and soil to realize drilling. In this solution, a plurality of blades 2 are even...

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 of the connecting handle 1 and the side of the drilling part are both smooth surfaces, and the connecting handle 1 Connect with the drilled part through 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 connecting handle 1 .

[0024] In order to enable the drill bit to use hydraulic equipment to realize drilling mud flushing, it is configured that a flushing water flow channel is also arranged in the drilling portion.

[0025] As a way to realize that the drill pipe can be used as the water injection flow channel, the connecting handle 1 has a cylindrical structure with an open upper end, and the u...

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Abstract

The invention discloses a PDC (polycrystalline diamond compact) drill bit convenient for mud discharge. The PDC drill bit comprises an upper connection handle, a drilling portion and a plurality of mud discharge holes, wherein the drilling portion is connected with the lower end of the connection handle. A plurality of blades are arranged on the drilling portion, and are in circular uniform arrangement relative to the axis of the connection handle. A bottom groove located at the lower end of the drilling portion is formed by encircling of the lower ends of the blades. The mud discharge holes are formed in the drilling portion. 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 extend to a position where the connection handle is connected with the drilling portion. The PDC drill bit has the advantage that mud coating can be relieved during working of the PDC drill bit through the structural design.

Description

technical field [0001] The invention relates to the technical field of geological drilling equipment, in particular to a PDC drill bit which is convenient for mud discharge. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/55E21B10/60
CPCE21B10/55E21B10/60
Inventor 谭逢林
Owner SICHUAN XILIN OIL SUPPLIES EQUIP
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