China Petroleum & Chemical Corporation

Sinopec Petroleum Engineering Technology Research Institute Co., Ltd.

Beijing Baidu Netcom Science and Technology Co., Ltd.

Haiping Zhang

Renlong Zhang

Yanbin Zang

Jiachang Wang

Lingchao Xuan

Xiaodan Liu

Lishuang Wang

Mingguang Sun

Yang Wang

Yifei Wang

Xinghua Tao

Guangjun Ma

Xunchao Song

Pengcheng Yuan

Xi Chen

Jianhua Liu

Shidong Ding

Dongqing Zhang

Jiepeng Zheng

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

The present disclosure provides a method for graph computing, an electronic device and a non-transitory computer-readable storage medium. An execution engine for managing execution of the graph computing is configured in a CPU. One or more interface functions running in a GPU for processing parameters of the graph computing are configured. During the execution of the graph computing, the one or more interface functions are called by the execution engine through a graph computing interface. The interface functions are executed in the GPU in parallel through multiple parallel threads. The interface functions are configured to process a plurality of graph vertexes in parallel. The multiple parallel threads are configured to feedback respective execution results of the interface functions to the execution engine. The graph computing is completed by the execution engine according to the execution results.

Method and apparatus for graph computing, electronic device and storage medium

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

A method includes obtaining a graph traversal statement; determining at least two operators contained in the graph traversal statement and an execution order, of the at least two operators, allocating a respective thread to each operator, creating a buffer queue for each two adjacent operators; for each two adjacent operators, executing an operation of a former operator by a thread, writing an executing result of the former operator to the buffer queue; an executing an operator of a latter operator by reading the execution result of the former operator by a thread from the buffer queue.

Method and apparatus for traversing graph database based on allocation of threads to operators

A method for storing a determinant text, an electronic device, and a computer-readable storage medium is disclosed. The method includes: obtaining a determinant text that is to be stored, the determinant text including a plurality of fields; obtaining valid fields from the plurality of fields; querying a field type table according to the valid fields to generate a data description field of the determinant text; determining a value storage field of the determinant text according to contents of the plurality of fields and the field type table; and storing the data description field and the value storage field to store the determinant text.

Growing community of inventors

Beijing, China

Haiping Zhang