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PDC drill bit with high drilling speed

A drilling speed and drilling head technology, applied in the field of PDC bits, can solve the problems of insufficient rock breaking force, limited exploration speed, limited drilling speed, etc., so as to improve the drilling speed and enhance the rock breaking force. , the effect of speeding up the cutting speed

Inactive Publication Date: 2015-09-09
CHENGDU GAOPU PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing PDC drill bit does not have enough rock-breaking force when exploring in hard rock formations or medium-soft rock formations because it uses cutting teeth to drill into rock formations, so that the penetration speed is limited, that is, drilling speed limit

Method used

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  • PDC drill bit with high drilling speed

Examples

Experimental program
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Effect test

Embodiment 1

[0016] A PDC drill bit with a fast drilling speed, comprising a bit body 1, a blade 3 provided on the bit body 1, and a chip flute 2 between two adjacent blades. The blade 3 is provided with two A row of cutting teeth, each row of cutting teeth includes 3 round cutting teeth 4 and 3 pointed cutting teeth 5, the exposed cutting teeth 5 are higher than the exposed cutting teeth 4, the The drill bit body 1 is provided with a drill bit 6 in the center of the top, and the drill bit 6 is a herringbone drill bit.

[0017] In the technical solution of this embodiment, the prior art is improved, the cutting teeth are set as circular cutting teeth 4 and pointed cutting teeth 5, and the exposure of the pointed cutting teeth is higher than that of the circular cutting teeth. When drilling, the pointed cutting teeth can cut the rock formation first, thereby enhancing the cutting ability of the formation and increasing the drilling speed. Two rows of cutting teeth are provided on the blades, ...

Embodiment 2

[0019] As shown in Question 1, a PDC drill bit with a fast drilling speed. This embodiment is improved on the basis of Embodiment 1: The circular cutting teeth 4 and the pointed cutting teeth 5 on each row of cutting teeth are arranged staggered. The circular cutting teeth 4 and the pointed cutting teeth 5 are arranged alternately, so that the pointed cutting teeth exert a uniform force on the rock formation and improve the service life of the pointed cutting teeth.

[0020] The protrusion of the pointed cutting teeth 5 is 1.0-1.5 mm higher than the protrusion of the circular cutting teeth 4. If the sharp cutting teeth are exposed to a higher level, the circular cutting teeth will only start to cut after they need to penetrate the ground deeper, which will slow down the efficiency. If the exposure of the pointed cutting teeth is low, the effect of rock breaking force is not obvious.

Embodiment 3

[0022] As shown in Question 1, a PDC bit with a fast drilling speed. This embodiment is improved on the basis of the above-mentioned embodiment: the drilling bit 6 is provided with reinforcing ribs. Because the bit body is herringbone, the petals of the bit body are easily damaged during the drilling process. The use of reinforcing ribs to connect between the petals can enhance its service life.

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Abstract

The invention discloses a PDC drill bit with the high drilling speed. The PDC drill bit comprises a drill bit body, blades arranged on the drill bit body and chip grooves arranged between every two adjacent blades. The blades are each provided with two rows of cutting teeth. Each row of cutting teeth comprises three circular cutting teeth and three pointed cutting teeth. The pointed cutting teeth are higher than the circular cutting teeth in exposure. The center of the top of the drill bit body is provided with a drilling head. The drilling head is a drill bit shaped like a Chinese character 'ren'. The PDC drill bit has the advantage of being high in drilling speed.

Description

Technical field [0001] The invention relates to a drilling tool for oil exploitation, in particular to a PDC bit with a fast drilling speed. Background technique [0002] Existing PDC drill bits mainly include cutting teeth, blades, nozzles and bit bodies, and most of the existing cutting teeth are round cutting teeth. Because of their good mechanical efficiency and long service life, they are widely used application. However, the existing PDC drill bit, because it uses cutting teeth to penetrate the rock formations, it does not have enough rock breaking force when drilling in hard rock formations or medium-soft rock formations, which limits the penetration speed, that is, drilling Speed ​​is limited. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a PDC bit with a fast drilling speed. [0004] The technical solutions adopted by the present invention to solve the above problems are: [0005] A PDC drill bit with a fast dr...

Claims

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Application Information

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IPC IPC(8): E21B10/43
Inventor 周斌
Owner CHENGDU GAOPU PETROLEUM ENG TECH
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