Development of laboratory and field drilling tools to measure bit operating conditions and drill string motions

Gao, Qian (2015) Development of laboratory and field drilling tools to measure bit operating conditions and drill string motions. Masters thesis, Memorial University of Newfoundland.

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Abstract

The advanced drilling laboratory (ADL) has been developing a Vibration Assisted Rotary Drilling (VARD) System for several years, which is used for seeking the advantages brought by combining drilling bit vibration and rotation together in drilling operation. In order to achieve the laboratory and field data acquisition and processing several integrated data acquisition systems are necessary. These systems are based on the most suitable sensors, acquisition parameters, and software to monitor different bit operating conditions and drill string motions in different experiments. The laboratory and field measurement systems include i) the control system of a Small Drilling Simulator (SDS), ii) a Mobile Data Acquisition system for field experiments, and iii) a Down Hole Measurement Tool, or Sensor Sub for drilling field trials. The system for the SDS is based on the LabVIEW programming language and includes the data acquisition, processing and system control ability. In this system, the LabVIEW user interface allows the operator to perform data acquisition, processing and logging. The Mobile data acquisition (DAQ) system is an extension of the SDS system based on the Signal Express Program and includes data acquisition and processing. It was designed to be able to be carried and operated in tough environments and has numerous data acquisition configurations for a range of different experimental requirements. The Down Hole Measurement Tool (Sensor Sub) is based on the use of accelerometers and magnetometers, along with onboard data acquisition and battery power systems; it is designed to operate in the down-hole environment with high temperature, high pressure and severe vibration to supply raw data for each drilling experiment. The field trial results show that the Sensor Sub can provide compatible and accurate data to identify drill string motions (including rotary speed and bit orientation), and bit vibrations (including axial lateral torsional and bit whirl).

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