China Petroleum Chemical Corporation

Sinopec Petroleum Engineering Technology Research Institute Co., Ltd.

Yanbin Zang

Haiping Zhang

Lingchao Xuan

Renlong Zhang

Jiachang Wang

Xiaodan Liu

Lishuang Wang

Mingguang Sun

Xinghua Tao

Guangjun Ma

Jianhua Liu

Dongqing Zhang

Shidong Ding

Baoping Lu

A turbine type pulse generator for downhole drilling tool has a pulse generating device (), which has a turbine housing (), a turbine shaft () concentrically arranged inside the turbine housing (), a turbine mechanism arranged around the turbine shaft (), and a valve disc mechanism provided at a lower end of the turbine shaft (). The turbine mechanism is configured to drive the turbine shaft () to rotate under an impact of drilling fluid, so that a flow area of the valve disc mechanism is changed periodically to generate pressure pulses. The turbine type pulse generator also has an automatic control mechanism () configured to keep the turbine shaft () static relative to the turbine housing () in a circumferential direction during composite drilling, and to drive the turbine shaft () to rotate relative to the turbine housing () under an impact of the turbine mechanism during sliding drilling.

State self-adaptive turbine type pulse generator and downhole drilling tool

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

A drilling speed-enhancing device has an outer cylinder a rotary main shaft arranged in an inner chamber of the outer cylinder and configured to rotate around its own axis; an output main shaft arranged below the rotary main shaft and configured to be driven by the rotary main shaft to rotate around its own axis, a lower end of the output main shaft extending out of the inner chamber of the outer cylinder for connecting with a drilling bit of a dual-drive drilling tool; and a percussion generator arranged between the output main shaft and the outer cylinder. The percussion generator can drive the outer cylinder and the rotary main shaft to move upward relative to the output main shaft, so that under action of WOB, the rotary main shaft and the outer cylinder move downward to generate impact on the output main shaft.

Drilling speed increasing device

Growing community of inventors

Beijing, China

Yanbin Zang