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US 2017/0321687 A1Published application
Linear hydraulic pump and its application in well pressure control
AssigneeSchlumberber Technology Corporation
InventorThomas Eugene Leonard, II
Life of this patent
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Abstract
An apparatus includes a linear motor and a fluid pump functionally connected to the linear motor. A fluid inlet of the fluid pump is in fluid communication with a fluid source. A fluid outlet of the fluid pump in fluid communication with a well. A pressure sensor is in fluid communication with the well. A controller is functionally coupled to the linear motor and the pressure sensor, wherein the controller is configured to operate the fluid pump to maintain a selected pressure in the well.
Claims20
An apparatus , comprising:
- a linear motor;
- a fluid pump functionally connected to the linear motor, a fluid inlet of the fluid pump in fluid communication with a fluid source, a fluid outlet of the fluid pump in fluid communication with a well;
- a pressure sensor in fluid communication with a subsurface well;
- a controller functionally coupled to the linear motor and the pressure sensor, wherein the controller is configured to operate the fluid pump to maintain a selected pressure in the well.
1 more element
A method, comprising:
- measuring a fluid pressure in a well;
- operating a linear motor functionally coupled to a fluid pump at a rate related to a difference between a selected pressure and the measured fluid pressure, a fluid inlet of the fluid pump in fluid communication with a fluid source, a fluid outlet of the fluid pump in fluid communication with a well;
- and
- stopping operation of the linear motor when the measured pressure is substantially equal to the selected pressure.
1 more element
Dependencies are inferred from the claim text.