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Pup joint and well drilling device

A technology of short joints and drilling fluid, applied in drilling equipment, vibration generating devices, drill pipes, etc., can solve the problems of slow drilling speed and low drilling rock breaking efficiency, so as to reduce drilling costs, prolong the life of drill bits, and reduce drilling accidents. Effect

Pending Publication Date: 2021-12-31
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a pup joint and a drilling device to solve the problems of low drilling and rock breaking efficiency and slow drilling speed of the drilling device in the prior art

Method used

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  • Pup joint and well drilling device

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Embodiment Construction

[0025] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] In order to solve the problem of low drilling efficiency of the drilling device in the prior art, the present invention provides a pup joint and the drilling device.

[0027] Please refer to Figure 1 to Figure 3 , a short joint, used to connect with a drill bit 20, the short joint includes: a short joint body 10, an oscillation cavity 11 is provided in the short joint body 10, so that the drilling fluid flowing into the oscillation cavity 11 forms a The mholtz resonance is used to drive the short joint body 10 and the drill bit 20 connected to the short joint main body 10 to generate resonance at a preset frequency.

[0028] The present invention provides a pup joint, which is arrange...

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Abstract

The invention provides a pup joint and a well drilling device. The pup joint is used for being connected with a drill bit, the pup joint comprises a pup joint body, an oscillation cavity is formed in the pup joint body, so that drilling fluid flowing into the oscillation cavity forms Helmholtz resonance in the oscillation cavity to drive the pup joint body and the drill bit connected with the pup joint body to generate ultrahigh-frequency vibration with preset frequency, and when the vibration frequency is close to the rock resonance frequency, rock resonance crushing is induced. The pup joint solves the problems that in the prior art, a drilling speed increasing device is low in drilling and rock breaking efficiency, low in drilling speed and long in drilling period in deep hard formation drilling.

Description

technical field [0001] The invention relates to the technical field of drilling tools, in particular to a pup joint and a drilling device. Background technique [0002] With the development of my country's oil and gas exploration and development to deep, ultra-deep and complex formations, the problems of low rock breaking efficiency and slow drilling speed in deep well drilling have become increasingly prominent, which have a great impact on well construction period and drilling cost. How to increase the drilling speed of deep and ultra-deep wells is one of the major technical problems that need to be solved urgently in the field of drilling engineering. Foreign research and practice have shown that if the drilling efficiency is doubled, the total drilling cost can be reduced by about 25%. Therefore, the increase in drilling speed is of great value for reducing drilling costs, maximizing benefits and scientific production. One of the key measures to increase the drilling sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/18E21B17/042E21B28/00
CPCE21B17/18E21B17/042E21B28/00
Inventor 纪国栋汪海阁武强黄洪春周波张佳伟崔柳刘力周翠平
Owner BC P INC CHINA NAT PETROLEUM CORP
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