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US 2018/0030968 A1Published application
Methods and systems for pressurizing harsh fluids
AssigneeSchlumberger Technology Corporation
InventorsSandeep Verma, Terizhandur S. Ramakrishnan, Jahir Pabon, John David Rowatt
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Abstract
Methods and systems relate to a pressure exchanger which exchanges pressure energy from a high pressure clean fluid system to a relatively low pressure harsh fluid system for use in pressurizing the harsh fluid and directing the fluid to a wellbore as high pressure harsh fluid without the harsh fluid contacting identified portions of the pressure exchanger.
Claims26
A method of pumping an oilfield fluid from a well surface to a wellbore, comprising:
- providing a low pressure source of harsh fluid;
- operating at least one high pressure pump to pump a clean fluid;
- and
- using a piston assembly which is in contact with clean fluid in a direction of movement and which pushes the clean fluid using the pressure from the at least one high pressure pump in order to provide high pressure to the harsh fluid, thereby pushing the harsh fluid under high pressure toward the wellbore.
1 more element
A system for pumping an oilfield fluid from a well surface to a wellbore comprising:
- a low pressure supply of harsh fluid;
- a high pressure pump in communication with a clean fluid;
- and
- at least two tubulars each comprising a piston assembly wherein each piston assembly is in contact with the clean fluid in the direction of movement of that piston assembly and pushes the clean fluid using the pressure from the high pressure pump in order to provide pressure to and push the harsh fluid, thereby pushing the harsh fluid under pressure toward the wellbore.
1 more element
Dependencies are inferred from the claim text.