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Impact breaking type PDC bit

A kind of impact crushing and drill bit technology, which is applied in the direction of drill bit, drilling equipment, earthwork drilling and mining, etc., can solve the problems of slow cutting speed of PDC bit, restriction of rock breaking efficiency of PDC bit, influence of mechanical penetration rate of PDC bit, etc. Drillability, improved rock breaking efficiency, and the effect of saving drilling costs

Active Publication Date: 2016-07-27
CHENGDU HUILINGFENG DIAMOND BIT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the PDC bit is working, it breaks rocks in a pure shear state. The cutting speed of several composite sheets in the center of the traditional PDC bit is very low compared with the peripheral composite sheets, which leads to a slow cutting speed of the PDC bit, which seriously affects the PDC bit. ROP
Most of the existing PDC bits are traditional PDC bits, including the new composite PDC bit. The core of the bit still works in the traditional shearing rock-breaking method, because the linear velocity of the bit core is very low, which seriously restricts the rock-breaking efficiency of the PDC bit and affects ROP, if the rock-breaking efficiency of the core of the drill bit can be improved, the ROP of the drill bit can be greatly improved under the same conditions

Method used

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] Such as Figure 1 to Figure 6 As shown, the impact crushing type PDC drill bit of the present invention includes a joint body 1 and a drill body 7 connected to the joint body 1, and a connected water cavity is formed inside the joint body 1 and the drill body 7. The upper impact chamber 2, the impact hammer 3, the impact pad 5 and the core breaker 6 are arranged in sequence from the water outlet to the water outlet. The upper impact chamber 2 is fixed in the joint main body 1, and the impact pad 5 and the core breaker 6 Fixed in the drill body 7, one end of the impact hammer 3 is fixed in the drill body 7, the other end is connected to the impact chamber 2, and the end of the core breaking hammer 6 is provided with a conical composite sheet 8. The joint body 1 forms a water inlet channel 15 , and the upper impact cavity 2 forms a first impact cavity 14 , and the fir...

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Abstract

The invention particularly relates to an impact breaking type PDC bit mainly applied to the field of petroleum drilling. The impact breaking type PDC bit comprises a connector body and a bit body connected with the connector body. A through water-passing cavity is formed in the connector body and the bit body, an upper impact cavity, an impact hammer, an impact cushion block and a rock core breaking hammer which are connected with one another are arranged in the water-passing cavity in sequence from a water inlet to a water outlet, the upper impact cavity is fixed in the connector body, the impact cushion block and the rock core breaking hammer are fixed in the bit body, one end of the impact hammer is fixed in the bit body, the other end of the impact hammer is connected with the upper impact cavity, and conical compacts are arranged at the tail end of the rock core breaking hammer. A traditional shearing rock breaking mode is replaced with the latest conical high-impact-resistance rock breaking mode for the core of the bit, and high-frequency impact is achieved at the core of the bit with pulse energy used by the PDCs, so that the core of the bit works in a rock impact breaking and rock ploughing combined mode, the rock breaking efficiency is improved, the mechanical drilling speed is increased, and the well drilling cost is lowered.

Description

technical field [0001] The invention relates to an impact crushing type PDC drill bit, which is mainly used in the field of petroleum drilling. Background technique [0002] When the PDC bit is working, it breaks rocks in a pure shear state. The cutting speed of several composite sheets in the center of the traditional PDC bit is very low compared with the peripheral composite sheets, which leads to a slow cutting speed of the PDC bit, which seriously affects the PDC bit. mechanical drilling speed. Most of the existing PDC bits are traditional PDC bits, including the new composite PDC bit. The core of the bit still works in the traditional shearing rock-breaking method, because the linear velocity of the bit core is very low, which seriously restricts the rock-breaking efficiency of the PDC bit and affects ROP, if the rock-breaking efficiency of the core of the drill bit can be improved, the ROP of the drill bit can be greatly improved under the same conditions. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/38
CPCE21B10/38
Inventor 贾新伟
Owner CHENGDU HUILINGFENG DIAMOND BIT
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