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Hydraulic control system for drilling systems

A technology of hydraulic control system and flushing system, which is applied in the direction of automatic control system of drilling, earthwork drilling, drilling equipment, etc., can solve problems such as increasing capital cost and downtime.

Inactive Publication Date: 2012-02-22
LONGYEAR TM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, when conditions change, a different bit needs to be replaced (if not the entire rig), which increases capital costs and / or downtime

Method used

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  • Hydraulic control system for drilling systems
  • Hydraulic control system for drilling systems
  • Hydraulic control system for drilling systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The control system provided here is for controlling multiple motors connected in parallel and in series, such as drilling motors. The control may include control or drive of parallel and series star valve (VIS) type motors. Such an arrangement can provide relatively high power and efficiency. This efficiency results in a corresponding reduction in heat build-up and problems associated therewith. For ease of reference, a hydraulic control system will be described here, but it should be understood that the control system can be applied to other types of control systems. As discussed below, the hydraulic control system allows the use of motors with different hydraulic displacements without the use of mechanical clutches. Further, due to the flexibility of the hydraulic control system, more gear combinations can be provided than other systems. Control systems can use various power sources, but for ease of reference, control systems with hydraulic power as the source of p...

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Abstract

A hydraulic control system includes a first motor, a second motor, a pump operatively associated with the first motor, a first coupling valve operatively associated with the second motor, first parallel valves operatively associated with the second motor, and a first switching valve operatively associated with the first coupling valve and the first parallel valves. The first switching valve is configured to switch the first coupling valve between a first coupling state and a second coupling state opposite the first coupling state and to switch the first parallel valves between a first parallel state and a second parallel state opposite the first parallel state.; While the first parallel valves are in the first parallel state a portion of the output of the first motor drives the second motor while the first parallel valves are in the second parallel state, the output of the pump drives the second motor.

Description

technical field [0001] The present invention relates to a hydraulic control system for a drilling system, in particular a hydraulic control system for a drill bit. Background technique [0002] Drilling machines are commonly used to drill holes in various substrates. Such drilling machines typically include a drill head mounted on a derrick. Drilling rigs typically include mechanisms and equipment capable of moving a drill bit along at least a portion of a derrick. The drill bit usually further includes a mechanism for receiving and engaging the upper end of the drill rod or pipe. The drill rod or pipe may be a separate rod or tube, or it may be part of a drill string that includes a cutting bit or other device on an opposite end, which may be referred to as a bit end. [0003] The drill bit applies a force to the drill pipe or pipe, which is transmitted to the drill string. If the applied force is rotational, the drill bit can cause the drill string to rotate within the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B44/00E21B44/06E21B4/02
CPCE21B7/022Y10T137/87225
Inventor 斯蒂芬·弗雷德克里斯托弗·克鲁泽
Owner LONGYEAR TM