摘要:
A slug mitigation system for subsea pipelines that includes a riser located between a low subsea level and an upper topside level of a pipeline. There is also a separator located at the top of the riser; and a surface jet pump located at a gas outlet of the separator. In another embodiment of a slug mitigation system, the surface jet pump is located downstream of an in-line separator on a gas outlet using high pressure gas from a downstream process or compressor.
摘要:
A system for improving oil-water separator performance wherein an electrostatic coalescer (15) is located upstream of a cyclonic oil-water separator (16). Preferably, the electrostatic coalescer is able to be bypassed and/or is located in parallel with a mechanical coalescer (17). In the case of parallel arrangement, selection of the flow path route between the electrostatic coalescer (15) and mechanical coalescer (17) is determined by use of an upstream phase detector (18).
摘要:
A system for measuring flow rate in a pipeline by use of a surface jet pump that receives input from both a high pressure pipeline and a low pressure pipeline. Rather than installing flow meters at any or all of the inputs/output from the SJP which is an expensive undertaking, flow rate is predicted by utilising existing pressure sensors located on the high pressure pipeline, low pressure pipeline and discharge pipeline respectively. A control processor predicts flow rate based on correlations between flow rate and pressure for a given SJP geometry and, for example, utilises momentum, conservation of mass and continuity equations, balanced against the pressure forces and velocity in the SJP.
摘要:
A separation system for separating a fluid mixture includes a uniaxial cyclonic separator (2) having a first inlet (16) for receiving a fluid mixture, a separation chamber (18) for separating the fluid mixture by cyclonic action into a dense first fluid and a less dense second fluid, a first outlet (22) for the first fluid and a second outlet (26) for the second fluid. The system further includes a reverse flow cyclonic separator (32) having a second inlet (30) for receiving the first fluid from the first outlet (22), a separation chamber for separating the first fluid by cyclonic action into a dense third fluid and a less dense fourth fluid, a third outlet (34) for the third fluid and a fourth outlet (36) for the fourth fluid. A method for the bulk separation of water from an oil/water mixture is also provided.
摘要:
An apparatus for controlling the flow of a fluid includes a LP fluid inlet (18) and a LP fluid outlet (9) connected to a flare/vent system. A LP flow line (20) connects the LP fluid inlet (18) to the LP inlet 6a of a jet pump (6). A supply of HP fluid is connected to jet pump inlet (6b), and a MP line (8) is connected to jet pump outlet (6c). A control unit (28) is configured to control operation of first and second LP flow control valves (4, 3) according to signals received from a flow meter (12), so that LP gas is diverted from the flare system to the LP inlet (6a) of the jet pump for pressurisation.
摘要:
A jet pump (26) includes an elongate tubular housing (30) that has a longitudinal axis (A), an upstream first end (32) and a downstream second end (34). A nozzle assembly (50) and a mixing tube/diffuser assembly (52) are removably received within the housing (30). The housing (30) includes a first inlet vent (40) for a HP first fluid, a second inlet vent (42) for a LP second fluid and an outlet vent (48) at the downstream second end (34) of the housing for the combined first and second fluids. The first and second inlet vents (40, 42) extend non-axially through a circumferential wall (31) of the tubular housing. The nozzle assembly (50) and the mixing tube/diffuser assembly (52) can removed from the housing (30) through the upstream first end (32).
摘要:
A separation system for separating a fluid mixture includes a uniaxial cyclonic separator (2) having a first inlet (16) for receiving a fluid mixture, a separation chamber (18) for separating the fluid mixture by cyclonic action into a dense first fluid and a less dense second fluid, a first outlet (22) for the first fluid and a second outlet (26) for the second fluid. The system further includes a reverse flow cyclonic separator (32) having a second inlet (30) for receiving the first fluid from the first outlet (22), a separation chamber for separating the first fluid by cyclonic action into a dense third fluid and a less dense fourth fluid, a third outlet (34) for the third fluid and a fourth outlet (36) for the fourth fluid. A method for the bulk separation of water from an oil/water mixture is also provided.
摘要:
A jet pump includes a housing having a first inlet for a first fluid, a second inlet for a second fluid and an outlet for a combined fluid comprising said first and second fluids. A nozzle assembly is removably received within the housing and configured to receive the first fluid from the first inlet, and a mixing tube/diffuser assembly removably received within the housing downstream of the nozzle assembly and configured to receive and combine the first and second fluids. The nozzle assembly and the mixing tube/diffuser assembly are removable from the housing through the first inlet.
摘要:
An apparatus for boosting the pressure of flowing fluids includes a plurality of jet pumps (10a, 10b), each having a LP inlet for LP fluid, a HP inlet for HP liquid and a MP outlet for MP fluid. A fluid separator device (16) is connected to receive the MP fluid from the outlets of the jet pumps, a gas outlet line (20) for a separated gas phase and a liquid outlet (22a, 22b) for separated liquid phase. A liquid return line (24b, 38) is connected to the liquid outlet of the fluid separator device and the HP inlets of the jet pumps (10a, 10b) for returning at least some of the separated liquid phase from the fluid separator device to the HP inlets of the jet pumps, and a mechanical pump (32) is connected into the liquid return line for boosting the pressure of the liquid delivered to the HP inlets of the jet pumps. A flow control system (6) is provided for controlling the flow of fluids through the respective jet pumps (10a, 10b).
摘要:
The apparatus consists of modular stages arranged in series, each stage including a main chamber and a nozzle opening. In practice, a fluid passing through the opening is subject to a pressure drop as it enters a main chamber of a subsequent stage in the series. This multi-stage pressure drop avoids a sharp drop in temperature, as would occur if the total pressure drop was achieved in one stage, that may cause hydrates to form in an oil/gas pipeline.