China Petroleum Chemical Corporation

Sinopec Petroleum Engineering Technology Research Institute Co., Ltd.

Exploration & Production Research Institute, Sinopec

Xinghua Tao

Haiping Zhang

Xiaodan Liu

Jiachang Wang

Lingchao Xuan

Renlong Zhang

Yanbin Zang

Mingguang Sun

Lishuang Wang

Yijin Zeng

Guangjun Ma

Xutian Hou

Shidong Ding

Guoqiang Xu

Baoping Lu

A drilling tool has an upstream drilling string, a downstream drilling bit, and a percussive device connected between the upstream drilling string and the downstream drilling bit. In a first state, the upstream drilling string is generated with elastic compression by the percussive device, and in a second state, the upstream drilling string releases the elastic compression to apply impacts on the downstream drilling bit through the percussive device. The drilling tool has a prolonged service life and can effectively reduce the drilling cost.

Well drilling tool and method for determining parameter thereof

A drilling tool includes an outer cylinder; a power rotary shaft arranged in an inner chamber of the outer cylinder; a percussion generator arranged below the power rotary shaft, having a transmission shaft extending in the outer cylinder and can be driven by the power rotary shaft to rotate around its axis, an output main shaft engaged with a lower end of the transmission shaft so as to be driven by the transmission shaft to rotate about its axis and is movable relative to the transmission shaft along an axial direction, and an percussion assembly The percussion assembly is arranged between an annulus formed between the upper end of the output main shaft and the outer cylinder and can generate reciprocating impact along the axial direction on the output main shaft. A drilling bit connected with the output main shaft extending out of the inner chamber of the outer cylinder.

Drilling tool

A speed-enhancing drilling tool includes an upstream drill string (), which has a drive motor and a first driving rod coupled therewith, a downstream drilling bit; and a percussive device connected between the upstream drilling string and the downstream drilling bit. The first driving rod extending axially and the drive motor are configured to drive the first driving rod in rotation. The percussive device has a rotary driving part having an upper end engaged with the first driving rod to rotate together therewith; and a rotary working part having an upper end engaged with a lower end of the rotary driving part and a lower end connected with the downstream drilling bit. The rotary working part can be driven by the rotary driving part to rotate about its axis, and axially movable relative thereto; and a percussion generating part arranged around the rotary working part.

Well drilling acceleration tool

The invention discloses a fluid-driven impactor, a power transmission mechanism for the impactor and the use of the impactor. In the prior art, the working life of the impactor is short, since a rubber primary seal and an upper fluid-diverging lid for the fluid-driven impactor are both liable to erosion and the efficiency in transmitting power is low due to the complexity of the power transmission mechanism. In order to increase the drilling speed and/or extend the life of the impactor, the side cavity passage is formed in such a way that the inner wall of the outer pipe is isolated from the side cavity passage in a watertight manner without the use of the rubber primary seal. The loss in transmitting power is minimized by integrating the anvil of the power transmission mechanism and the lower joint. The problem of abrasion of the fluid-diverging hole is overcome and the nozzle can be used with different fluid flow by mounting a replaceable nozzle in the upper fluid-diverging lid, the nozzle selected from a series of nozzles with various inner diameters and made of a material more wearable than the material for diverging lid the upper fluid.

Power transmission unit of an impactor, a hydraulic jet impactor and the application thereof

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Beijing, China

Xinghua Tao