Wells – Processes – Separating material entering well
Patent
1996-05-03
1999-01-12
Tsay, Frank
Wells
Processes
Separating material entering well
166 7512, E21B 4334
Patent
active
058575227
ABSTRACT:
This invention provides a fluid-handling system for use in underbalanced drilling operations. The system includes a first vessel which acts as a four phase separator. The first vessel includes a first stage for separating solids. Oil and gas are separated at a second stage. A pressure sensor provides signals to a pressure controller, which modulates a gas flow valve coupled to the vessel for discharging gas from the first vessel. The pressure controller maintains the pressure in the first vessel at a predetermined value. An oil level sensor placed in the first vessel provides a signal to an oil level controller. The oil level controller modulates an oil flow valve coupled to the vessel to discharge oil from the first vessel into a second vessel. Water is discharged into a third vessel. Water from the third vessel is discharged via a water flow control valve, which is modulated by a level controller as a function of the water level in the third vessel. Any gas in the third vessel is discharged by modulating a gas control valve as a function of the pressure in the third vessel. In an alternative embodiment, a central control unit or circuit is utilized to control the operations of all the flow valves. During operations, a control unit maintains the pressure and the levels of the fluids in such vessels at their respective predetermined values according to programmed instructions.
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Arnold et al, "Surface Production Operations", vol. 1, 1986, pp. 123-12.
Bradfield David H.
Bridger Philip J.
Cummins David P. J.
Baker Hughes Incorporated
Tsay Frank
LandOfFree
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