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High-drilling-speed PDC drill bit

A technology of drilling speed and drilling head, which is applied in the direction of drill bit, drilling equipment, earthwork drilling and mining, etc., can solve the problems of insufficient rock-breaking force, limited exploration speed, and limited drilling speed, etc. Feed speed, enhanced rock-breaking force, and faster cutting speed

Inactive Publication Date: 2014-09-03
CHENGDU LAIBAO PETROLEUM EQUIP
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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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  • High-drilling-speed PDC drill bit

Examples

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Effect test

Embodiment 1

[0016] A PDC drill bit with high drilling speed, comprising a drill body 1, a blade 3 arranged on the drill body 1 and a chip removal groove 2 between two adjacent blades, the blade 3 is provided with two Rows of cutting teeth, each row of cutting teeth includes 3 circular cutting teeth 4 and 3 pointed cutting teeth 5, the exposure of the pointed cutting teeth 5 is higher than that of the circular cutting teeth 4, and the A drilling head 6 is arranged at the center of the top of the drill body 1, and the drilling head 6 is a herringbone drill.

[0017] In the technical solution of this embodiment, the existing technology 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 sharp cutting teeth can first cut the rock formation, enhance the cutting ability of the formation, and increase the drilling speed. Two rows of cutt...

Embodiment 2

[0019] As shown in Question 1, a PDC drill bit with a high penetration rate, this embodiment is improved on the basis of Embodiment 1: the circular cutting teeth 4 and pointed cutting teeth 5 on each row of cutting teeth are arranged alternately. The circular cutting teeth 4 and the pointed cutting teeth 5 are alternately arranged, so that the pointed cutting teeth are evenly stressed on the rock formation, and the service life of the pointed cutting teeth is improved.

[0020] The exposure of the pointed cutting teeth 5 is 1.0-1.5 mm higher than that of the circular cutting teeth 4 . If the sharp cutting teeth are exposed higher, the circular cutting teeth start to cut after the depth of the ground cutting needs to be deep, which makes the efficiency slower. If the exposure of the sharp cutting teeth is low, the effect of rock breaking force is not obvious.

Embodiment 3

[0022] As shown in Question 1, a PDC drill bit with a high drilling speed, this embodiment is improved on the basis of the above embodiment: the drill bit 6 is provided with reinforcing ribs. Because the drill bit body is herringbone, the petals of the drill bit body are easily damaged during the drilling process, and the ribs are used to connect the petals to increase their service life. Due to the need to connect the ribs, in Embodiment 1, the herringbone drill bit is used, which is also beneficial to the fixing of the ribs compared to other forms.

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Abstract

The invention discloses a high-drilling-speed PDC drill bit. The high-drilling-speed PDC drill bit comprises a drill bit body, tool wings arranged on the drill bit body, and chip grooves formed between the tool wings. Two rows of cutting teeth are arranged on each tool wing. Each row of cutting teeth include the three circular cutting teeth and the three sharp cutting teeth. The exposed portions of the sharp cutting teeth are higher than the exposed portions of the circular cutting teeth. A drilling head is arranged in the center of the top of the drill bit body. A Y-shaped drill bit body serves as the drilling head. The high-drilling-speed PDC drill bit has the advantage of being high in the drilling speed.

Description

technical field [0001] The invention relates to a drilling tool for oil production, in particular to a PDC drill bit with a high 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 circular cutting teeth, which are widely used due to their good mechanical performance and long service life. application. 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 ​​is limited. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a PDC drill bit with high drilling speed. [0004] The technical solution adopted by the present invention to solve the above problems is: [0005] A PDC drill...

Claims

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Application Information

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IPC IPC(8): E21B10/43E21B10/26
Inventor 谭正怀
Owner CHENGDU LAIBAO PETROLEUM EQUIP
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