Composite shocking rolling self-adjusted PDC drill

A self-adjusting, drill bit technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve problems such as drilling equipment damage, drill bit braking, and uneven rock hardness, reducing frictional resistance, improving adaptability and drilling. The effect of efficiency

Pending Publication Date: 2018-02-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of oil drilling, due to the different lithology and rock composition structure of the drilled strata, the rocks have different degrees of softness and hardness, resulting in uneven softness and hardness of the stratum rocks encountered by the drill bit during the drilling process. At the same time, due to the alternation of soft and hard formations, the drill bit will be subject to a large impact force during the process of entering another formation from one formation, and may also cause the drill bit to brake due to too deep cutting into the formation and the torque becomes larger. It leads to abnormal wear of the drill bit and even damage to the drilling equipment, seriously affecting the efficiency and benefits of oil and gas drilling

Method used

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  • Composite shocking rolling self-adjusted PDC drill
  • Composite shocking rolling self-adjusted PDC drill

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing:

[0011] like figure 1 As shown, the composite impact rolling self-adjusting PDC drill bit of the present invention includes a drill bit body 1, a sealing compression nut 2, a hydraulic pushing device 3, an impact ball 4, cutting teeth 5, a drill bit inner flow channel 6, and a hydraulic pushing device input Runner 7, drill bit blade 8, impact rolling device jacket 9, piston rod 10, impact ball limit sleeve 11. The drill bit blade 8 is arranged on the lower part of the drill bit body 1, the impact rolling device outer cover 9 is arranged inside the drill bit blade 8, the impact rolling device outer cover 9 is connected with the drill bit blade 8 through threads, and the sealing compression nut 2 is installed on the impact rolling device through threads Inside the casing 9, the high-pressure drilling fluid can be sealed and the lower hydraulic pushing device 3 can be pressed....

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Abstract

The invention belongs to the field of oil well drilling, and particularly relates to a composite shocking rolling self-adjusted PDC drill. The drill comprises a drill body, sealing tightening nuts, hydraulic pushing devices, shocking rolling balls, piston rods, shocking rolling ball limit sleeves and the like; a shocking rolling device cover is arranged in each drill blade wing, the sealing tightening nuts are installed in the shocking rolling device covers, the hydraulic pushing devices are arranged at the lower portions of the sealing tightening nuts, and the piston rods are connected with the hydraulic pushing devices and the shocking rolling balls respectively; the shocking rolling balls are arranged in the shocking rolling ball limit sleeves and installed on the bottoms of the drill blade wings. A shocking effect of the drill can be achieved, the cutting depth of the drill in a stratum is controlled, the friction resistance between the drill and the stratum is reduced, and the adaptability and drilling efficiency of the PDC drill to the stratum can be improved.

Description

technical field [0001] The invention relates to a composite impact rolling self-adjusting PDC drill bit, which belongs to the field of petroleum drilling. Background technique [0002] In the process of oil drilling, due to the different lithology and rock composition structure of the drilled strata, the rocks have different degrees of softness and hardness, resulting in uneven softness and hardness of the stratum rocks encountered by the drill bit during the drilling process. At the same time, due to the alternation of soft and hard formations, the drill bit will be subject to a large impact force during the process of entering another formation from one formation, and may also cause the drill bit to brake due to too deep cutting into the formation and the torque becomes larger. It leads to abnormal wear of the drill bit and even damage to the drilling equipment, which seriously affects the efficiency and benefits of oil and gas drilling. [0003] Aiming at the above probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46E21B10/36E21B10/43
CPCE21B10/36E21B10/43E21B10/46
Inventor 周龙昌赵健徐依吉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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