China Petroleum Chemical Corporation

Sinopec Tech Houston, LLC

Jun Han

Sheng Zhan

Jinhai Zhao

Fengtao Hu

Herong Zheng

Weiping Xu

A method for obtaining accuracy gravity coefficients out of three orthogonally oriented accelerometer devices and a thermometer by computing, using a pre-programmed micro-control unit processor, temperature errors, bias error coefficients, sensitivity error coefficients, and orthogonality error coefficients during measurement while drilling operations. Particularly, the method uses voltage data values of the three orthogonally oriented accelerometers to compute said error coefficients which provides for zero-error positioning of the MWD tool during long-term downhole surveying as well as while facing high-shock, vibrations, and high temperatures.

Method for obtaining gravity coefficients for orthogonally oriented accelerometer devices during measurement-while-drilling operations

A method and a system implementing the method, are disclosed for computing magnetic interferences in measurement while drilling operations, using the retrieved lateral, and axial magnetic interferences of the measurement while drilling downhole tool system. With the disclosed method and system of implementing the method, it can be determined whether the source of the magnetic interference is from the measurement while drilling downhole tool system lateral direction or its axial direction. When magnetic field strength is abnormal, the lateral and axial magnetic interferences are monitored, and then compared against their values before the abnormal magnetic field strength. This way the direction of the magnetic interference is analyzed to eliminate or judge the cause of the interference, and properly guide the measurement while drilling downhole tool system towards its reservoir or well location.

Method and system for detecting downhole magnetic interference on measurement while drilling operations

A method for controlling a MWD tool in a bottom hole assembly in a borehole includes the steps of installing a plurality of firmware in the MWD tool, turning a mud pump on an earth surface ON or OFF according to a pre-determined sequence; determining a mud flow in the borehole to be ON or OFF so as to form a binary signal; and sending the binary signal to the MWD tool. The plurality of firmware are pre-programmed to perform a plurality of tasks while the binary signal executes one of the plurality of firmware in the MWD tool.

Method for controlling MWD tool in bottom hole assembly

A drilling system that includes a mud pump disposed on an earth surface and a drill string with a bottom hole assembly (BHA) in a borehole. The drilling system can be controlled by turning the mud pump ON or OFF according to a pre-determined sequence so that the mud flow in the borehole fluctuates between high and low. The mud pulser in the bottom hole assembly senses the fluctuation in the mud flow and generates a binary signal accordingly. The mud pulser further sends the binary signal to a measurement-while-drilling (MWD) tool in the bottom hole assembly. The binary signal executes one or more firmware in the MWD tool.

Method for controlling a drilling system

An apparatus for collecting and storing sensor data for an oil drilling system is disclosed. The apparatus for collecting and storing sensor data may include a drill string including a bottom whole assembly which includes a drill bit and a measurement-while-drilling (MWD) assembly; a master board including a master board micro controller unit (MCU) in the MWD assembly; a plurality of sensor boards to sense and collect sensor data; a removable central storage unit, including a central storage unit MCU in the MWD assembly, to store sensor data collected by the plurality of sensor boards; and an internal bus coupled to the master board, the plurality of sensor boards, and the removable central storage unit to carry sensor data from the plurality of sensor boards to the removable central storage unit for storage by the removable central storage unit.

Central storage unit for a measuring-while-drilling assembly for an oil drilling system

An apparatus for traveling between an earth surface and a wellbore in an earth formation contains an instrument sub, a thruster for generating a motive force, and a power source that provides power to the instrument sub and the thruster. The instrument sub contains well logging instruments. The instrument sub, the thruster, and the power source are connected to form or are disposed in a substantially tubular body. The apparatus further contains a buoyance-generating device.

Autonomous through-tubular downhole shuttle

A data sampling and collection system in an oil drilling system includes a data acquirer installed in the measurement sub to transmit a sampling collector identification signal to one of a plurality of sampling collectors coupled to the data acquirer. Each sampling collector includes a sensor and a plurality of random access memory (RAM) pages to store sensor data received from the sensor. When one of the sampling collectors receives the enable signal from the data acquirer, a current RAM page currently receiving sensor data from the sensor continues to receive sensor data without interruption and an immediately preceding RAM page storing a last completed page of received sensor data is transmitted from the one sampling collector to a memory of the data acquirer and from there to a surface computing system. As such, recent data is retrieved and transmitted for processing without interrupting the continuous collection of sensor data.

Independent high-speed sampling for an oil drilling system

A method for operating a drilling system that has a mud pump disposed on an earth surface and a drill string with a bottom hole assembly (BHA) in a borehole. The method involves turning the mud pump ON or OFF according to a pre-determined sequence so that the mud flow in the borehole fluctuates between high and low. The mud pulser in the bottom hole assembly senses the fluctuation in the mud flow and generates a binary signal accordingly. The mud pulser further sends the binary signal to a measurement-while-drilling (MWD) tool in the bottom hole assembly. The binary signal executes one or more firmware in the MWD tool.

System and method for transmitting signals downhole

The present disclosure provides a drilling system that comprises a drilling rig, a device box having a plurality of sensors monitoring operating parameters of the drilling rig, an OPC UA server receiving data from the plurality of the sensors, and an OPC UA client in communication with the OPC UA server. The OPC UA client has a client library between the client application layer and the client SDK layer, which converts a client application to an OPC UA operation.

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Houston, TX, United States of America

Jun Han