| 摘要 |
<p>A MWD mud pulser (1) or similar oil tool, comprising one or more of the following novel components: a hydraulic system comprising an accumulator (667) forming a reservoir maintainable under pressure operatively attached to a pressure operated, one-way valve (647) to permit hydraulic fluid to be added under pressure to the reservoir, a turbine assembly (500) having a stator (536) structured to form a passageway (536a) through which electrical wires may pass through the turbine assembly (500) and/or a turbine assembly (500) comprising a stator (536) and rotor (538) wherein only one of the stator (536) or rotor (538) is constructed having curved fins, one or more pipe collars (4) having at least two internally extending shoulder sections (4a) for supporting and retaining the turbine assembly (500) and an actuator assembly (600) within the pipe collar or collars (4), and a circuit board mounting assembly (202) comprising a plate (214) to which the circuit board (218) may be positioned and a clamp (216) to fix the circuit board (218) to the plate (214) to substantially reduce any mechanical vibrations which may occur during use of the oil tool.</p> |
