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Well drilling rod and pulse plasma drilling machine system

A technology for drilling rods and drilling rigs, which is applied in the field of plasma drilling rig systems, can solve the problems that the drill bit electrodes cannot be guaranteed to drill vertically, the drilling rig cannot work continuously, and cannot work normally, so as to improve energy utilization efficiency, simple structure, Reliable effect of connection

Inactive Publication Date: 2012-09-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of device does not have a drilling correction device for the drill electrode, and the gravity of the drill electrode connector alone cannot guarantee that the drill electrode can drill vertically. In the case of external disturbances, the drill electrode may deviate from the vertical direction. In this case, the drill electrode will be "stuck" and cannot work normally
Since the water inlet and outlet pipes have no supporting structure, when the drilling reaches a certain depth, the water pipes collapse due to gravity, and the drilling rig cannot continue to work

Method used

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  • Well drilling rod and pulse plasma drilling machine system
  • Well drilling rod and pulse plasma drilling machine system
  • Well drilling rod and pulse plasma drilling machine system

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Embodiment Construction

[0044] Combine the following figure 1 Explain the principle of pulsed plasma breaking rock. Such as figure 1 As shown, the rock 1 is placed in the deionized water 2, the high voltage electrode 3 and the ground electrode 4 are placed on the surface of the rock 1, and the high voltage electrode 3 and the ground electrode 4 are immersed in the deionized water environment. When a high-voltage pulse is applied between the high-voltage electrode 3 and the ground electrode 4, a discharge occurs between the high-voltage electrode 3 and the ground electrode 4, causing electrical breakdown of the rock 1, and forming a plasma channel 5 in the rock 1. Energy is injected into the plasma channel 5 and causes the plasma channel 5 to expand. The expansion of the channel will cause stress damage to the rock 1, and when the stress intensity of the rock 1 is exceeded, the rock 1 will be broken.

[0045] refer to figure 2 , The drilling rig system is mainly composed of a drilling mechanism 9...

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Abstract

The invention discloses a well drilling rod and a pulse plasma drilling machine system. The well drilling rod comprises at least one well drilling rod unit, wherein each well drilling rod unit comprises at least two open-close type support rings and a connecting rod; two adjacent support rings are fixedly connected through one connecting rod; the well drilling rod units are connected in sequence; and two adjacent support rings of two adjacent well drilling units are fixedly connected. The well drilling machine system comprises a well drilling mechanism comprising the well drilling rod, a high-pressure pulse power supply, a high-pressure low-wave impedance coaxial water cable, a water circulating device and a drill bit electrode for discharging towards rock stone, so that the drill bit electrode can be always contacted with the rock stone and keep drilling vertically downwards, and the problems of collapse of a water pipe and a cable and the like occurring during deep drilling in the conventional plasma drilling machine are avoided simultaneously; and moreover, the length of the well drilling rod is adjusted by increasing or decreasing the well drilling rod units, so that well drilling of different depths can be realized.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration and development, and in particular relates to a pulse plasma drilling rig system used for rock crushing to realize well drilling. Background technique [0002] With the rapid growth of global oil and gas demand and the increasingly prominent crisis of onshore oil and gas resources, the exploration and development of offshore oil and gas resources has become crucial. It is an urgent requirement of my country's oil and gas strategy to develop advanced drilling equipment and exploit the huge and precious resources in my country's ocean field. [0003] Traditional drilling methods include mechanical drilling and conventional blasting. The mechanical drilling method uses the impact and shear action of the drilling tool on the rock to produce stress failure. This method has the advantages of simple structure, convenient operation, and fast rock breaking speed. However, the drilling tool...

Claims

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Application Information

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IPC IPC(8): E21B7/00E21B17/00
Inventor 闫克平章志成裴彦良黄逸凡
Owner ZHEJIANG UNIV
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