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US 2007/0183900 A1Published application
Submersible pumping system
AssigneeSchlumberger Technology Corporation
InventorsMurat Ocalan, Steven Dornak
Life of this patent
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Abstract
A technique is provided for pumping fluids in a subterranean wellbore. A submersible pumping system can be deployed in a wellbore for moving desired fluids within the wellbore. The pumping system energizes the desired fluid movement by reciprocating a working fluid between expandable members.
Claims23
A system to pump fluid in a wellbore, comprising:
- a pump housing with a fluid inlet and a fluid outlet, the pump housing having a pair of chambers;
- a pair of expandable members with one of the expandable members deployed in each chamber of the pair of chambers;
- a working fluid;
- and
- a hydraulic control system to control reciprocation of the working fluid from one expandable member to the other, the resulting sequential contraction and expansion of the expandable members drawing well fluid into one chamber while well fluid is discharged from the other chamber, the reciprocation being controlled via a control valve shifted between flow positions by a sensing system having a sequence valve connected in series with a spool valve.
2 more elements
A pump to move a well fluid, comprising:
- a pump housing having a well fluid inlet and a well fluid outlet;
- a first chamber having a first expandable member therein;
- a second chamber having a second expandable member therein;
- a working fluid segregated for reciprocating movement between the first expandable member and the second expandable member;
- and
- a control system having a control valve that is sequentially shifted between positions that enable reciprocation of the working fluid between the first and second expandable members, the control valve sequencing being controlled by a sensing system positioned upstream of the control valve.
3 more elements
A method of pumping well fluid in a subterranean location, comprising:
- deploying a pair of expandable members within a pair of pump chambers;
- placing a well fluid inlet and a well fluid outlet in communication with each pump chamber of the pair of pump chambers;
- alternating the drawing in of well fluid and the discharging of well fluid for each pump chamber by reciprocating a working fluid between the pair of expandable members;
- controlling the movement of working fluid between expandable members with a control valve shiftable between flow positions;
- and
- repeatedly shifting the control valve between flow positions based on inputs from a sensing system positioned on an upstream side of the control valve with respect to flow of working fluid.
3 more elements
Dependencies are inferred from the claim text.