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Double-tooth PDC drill bit high in drilling speed

A drilling speed, double-tooth technology, applied in drill bits, drilling equipment, earth-moving drilling and other directions, can solve the problems of cuttings discharge limitation, affecting the drilling speed of the drill bit, and blade clearance limitations, etc., and achieve the effect of reducing the impact.

Inactive Publication Date: 2014-06-04
CHENGDU DAMO PETROLEUM MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the existing PDC drill bit adopts the main blade and the auxiliary blade to set the cutting teeth respectively. This structure makes it necessary to arrange a lot of blades, so that the gap between the blades is limited, and the discharge of cuttings is restricted.
Due to the poor discharge of cuttings, the resistance of the drill bit increases during drilling, which affects the drilling speed of the drill bit, and the constant friction between the cuttings and the drill bit will seriously affect the use of the blades and cutting teeth of the drill bit. influences

Method used

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  • Double-tooth PDC drill bit high in drilling speed

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Comparison scheme
Effect test

Embodiment 1

[0017] The double-teeth PDC drill bit with fast drilling speed includes a drill body 1, a nozzle 6, and blades uniformly arranged on the drill body 1. The blade includes an upper blade 3 and a lower blade 2. The upper The blade 3 is provided with a first PDC cutting tooth row 4 and a second PDC cutting tooth row 5, the exposure of the first PDC cutting tooth row 4 is higher than that of the second PDC cutting tooth row 5, adjacent The included angle between the gap formed between the two lower blades 2 and the central axis of the drill body 1 is greater than 5 degrees and less than 35 degrees.

[0018] The number of cutting teeth of the first PDC cutting tooth row 4 and the second PDC cutting tooth row 5 is equal.

[0019] In the present invention, since a certain angle is formed between the gap formed by two adjacent lower blades 2 and the central axis of the drill body 1, the gap is a spiral arc with respect to the central axis of the drill body, and the drill bit is drilled...

Embodiment 2

[0021] In this embodiment, a set of data is optimized within the angle range disclosed in Embodiment 1, that is, the angle between the channels formed by two adjacent lower blades 2 and the central axis of the drill body 1 is 15 degrees.

Embodiment 3

[0023] In this embodiment, a set of data is optimized within the angle range disclosed in Embodiment 1, that is, the angle between the channels formed by two adjacent lower blades 2 and the central axis of the drill body 1 is 30 degrees.

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Abstract

The invention discloses a double-tooth PDC drill bit high in drilling speed. The double-tooth PDC drill bit comprises a drill bit body, a nozzle and blades evenly arranged on the drill bit body. Each blade comprises an upper blade body and a lower blade body, a first PDC cutting tooth row and a second PDC cutting tooth row are arranged on each upper blade, the exposure of the first PDC cutting tooth rows is higher than that of the second PDC cutting tooth rows, and the included angle between a clearance formed by two adjacent lower blade bodies and the axis of the drill bit body is larger than five degrees and smaller than 35 degrees. The double-tooth PDC drill bit has the advantages that rock debris can be discharged conveniently, and the drilling speed of the drill bit is high.

Description

technical field [0001] The invention relates to the field of special drill bits for oil drilling, in particular to a double-teeth PDC drill bit with fast drilling speed. Background technique [0002] The existing PDC drill bit is drilling into the soil layer. When the drill bit is drilling at a high speed, there are many cuttings produced by the cutting teeth, and the accumulation of cuttings is easy to occur. Since the channel between the blades is parallel to the central axis of the bit body, cuttings will accumulate in the channel during the drilling and rotation of the bit body, making it difficult to discharge the cuttings, and the cuttings will only follow the movement of the cuttings. Constantly increasing, being squeezed out of the ditch. And the existing PDC bit, it adopts main blade and auxiliary blade to set cutting teeth respectively, this structure makes it necessary to arrange a lot of blades, so that the gap between the blades is limited, so that the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
Inventor 贺昶明
Owner CHENGDU DAMO PETROLEUM MACHINERY GRP