Cement mixer and multiple purpose pumper (CMMP) for land rig
AssigneeSchlumberger Technology Corporation
InventorsJacques Orban, Shunfeng Zheng, Bartley Patton, Eric Erickson
Life of this patent
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Abstract
Embodiments disclosed provide a pump assembly including a first pump for delivering at least one fluid. The first pump may include a first inlet coupled to the first pump for delivering at least one first fluid to the first pump, a second inlet coupled to the first pump for delivering at least one second fluid to the first pump, a first discharge coupled to the first pump for delivering the at least one first fluid at a first pressure, and a second discharge coupled to the first pump for delivering the at least one second fluid at a second pressure. In some embodiments, the first discharge and the second discharge are isolated from each other.
Claims20
A method of delivering fluids to a borehole, the method comprising:
- feeding a first fluid to a first pump;
- pumping the first fluid into the borehole at a first pressure with the first pump and a first discharge;
- feeding a second fluid to the first pump;
- circulating the second fluid through the first pump and the first discharge to clean the first pump;
- feeding a third fluid to the first pump;
- pumping the third fluid into the borehole at a second pressure with the first pump and a second discharge, wherein the second pressure is different than the first pressure;
- and
- isolating the first pump from the first fluid and the second fluid while feeding the third fluid to the first pump and pumping the third fluid into the borehole with the first pump.
Dependencies are inferred from the claim text.