Double power head derrick and full hydraulic double power head casing drilling rig

Abstract

The invention relates to the technical field of drilling machinery, in particular to a double-power-head derrick and a full hydraulic double-power-head casing pipe drilling machine. The double-power-head derrick comprises a stand column and a carriage. A first hydraulic motor, a first power head, a second hydraulic motor and a second power head are arranged on the carriage. An inner drill pipe is installed on the first power head, and an inner drill is installed at the lower end of the inner drill pipe. An outer casing pipe is installed on the second power head, a casing pipe drill is installed at the lower end of the outer casing pipe, and the outer casing pipe is located outside the inner drill pipe. The double-power-head derrick and the full hydraulic double-power-head casing pipe drilling machine are reasonable and compact in structure and convenient to use; the two power heads are installed on the stand column, the two power heads can work simultaneously or work separately according to needs, and the full hydraulic double-power-head casing pipe drilling machine has remarkable advantages compared with a single-power-head drilling machine with boundedness; the inner drill pipe and the outer casing pipe can conduct drilling at the same time, so that efficiency is high, and drilling of stratums with cracks is achieved; the outer casing pipe is used repeatedly, so that a great amount of cost is saved; and the double-power-head derrick and the full hydraulic double-power-head casing pipe drilling machine have the characteristics of being safe, easy, convenient and efficient and saving labor.

Description

technical field [0001] The invention relates to the technical field of drilling machinery, and relates to a double-power-head derrick and a full-hydraulic double-power-head casing drilling rig. Background technique [0002] At present, drilling rigs are generally single-head drilling rigs. When drilling into complex formations such as fractured formations and gravel boulders, single-power-head drilling rigs have the problems of weak well walls, prone to collapse, low drilling efficiency, and high failure rate. Therefore, there is an urgent need to provide a new type of drilling rig, which can adapt to complex formations such as cracks, gravel, and boulders, protect the well wall, improve drilling efficiency, and reduce failure rates. Contents of the invention [0003] The present invention provides a double power head derrick and a fully hydraulic double power head casing drilling rig, which overcomes the above-mentioned deficiencies in the prior art, and can effectively s...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a double power head derrick and a fully hydraulic double power head casing drilling rig, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problems of low drilling efficiency and low Problems prone to failure

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