Control mechanism
AssigneeFlexidrill Limited
InventorsGregory Donald West, Peter Evan Powell
Life of this patent
Estimating the term…
Abstract
The use in a drillstring of a positive displacement motor (PDM) with both an output upwardly and an output downwardly to devices spaced at least by the PDM.
Claims22
1-22. (canceled)
A dual output positive displacement motor (PDM) comprising:
- (i) a stator surround,
- (ii) a single PDM rotor located within the surround;
- (iii) a first take-off extending from a first end of the PDM rotor for providing rotational output to a first tool, and
- (iv) a second take-off extending from a second end of the PDM rotor for providing rotational output to second tool.
A downhole assembly forming part of a drilstring, or to be part of a drillstring, said assembly comprising or including:
- (i) a stator surround,
- (ii) a single positive displacement motor (PDM) rotor located within the surround;
- (iii) a first take-off extending from a first end of the PDM rotor for providing rotational output to a first tool, and
- (iv) a second take-off extending from a second end of the PDM rotor for providing rotational output to second tool.
A drillstring assembly having a bit, and having a downfeed in use of drilling mud or other fluid;
- the assembly
- being wherein at least part of the fluid acts through a single positive displacement motor (PDM) having a single PDM rotor within a stator surround in use to cause rotation of the PDM rotor;
- and being further characterised in that the PDM rotor has a first take-off that provides downwardly a rotational output to a first tool downwardly of the PDM rotor, or to the bit and has a second take-off that provides upwardly a rotational output to a second tool upwardly of the PDM rotor.
An apparatus having a control mechanism for a fluid to be provided downhole as a pressurised stream, the mechanism allowing pressurised fluid to bypass or not, whether wholly or in part, and whether through or about, a downhole rotary output(s) generator so that it can be treated as turned off or on.
A control mechanism that works in conjunction with downhole tools which generate rotary output(s) as a result of a pressurised drilling fluid input whereby;
- the control mechanism allows pressurised fluid to bypass (or not) through the rotary generation tool so that the tool is able to be turned off or on, such a device is then able to rotationally activate a downhole axially oscillating device, such a device including a cam/wobble plate or other, a compliant member that transmits rotational torque and controls an axially oscillating mass in both compression and tension.
Dependencies are inferred from the claim text.