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Method and system for pressure control of hydrocarbon well fluids

IP.com Disclosure Number: IPCOM000246483D
Publication Date: 2016-Jun-10

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Method and system for pressure control of hydrocarbon well fluids

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method and a system arranged for pressure control of well fluids produced in hydrocarbon production. The invention particularly relates to a system aiming for reduced power consumption and recovery of energy in rotating equipment used in the production and transportation of hydrocarbon fluid from wells to topside recipient.

BACKGROUND AND PRIOR ART

Hydrocarbon wells in a hydrocarbon production field typically produce at different pressure and flow rate at a given point in time. The individual oil or gas well also usually delivers at a flow rate and pressure that is decreasing over time. Changes in well fluid pressure and control of flow rate and pressure in produced well fluid is conventionally handled by choking or boosting the flow: i.e. if well fluid pressure is higher than desired in downstream equipment the flow is restricted by means of a choke valve arranged on the well head, and if well fluid pressure is lower than required for transport or downstream treatment the flow may be increased by means of a booster pump or compressor arranged downstream of the choke valve. Boosting and choking are processes that either consume energy or reduce the potential production rate from wells in a hydrocarbon production field.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide pressure control of well fluids produced from wells in a hydrocarbon production field.

It is another object of the present invention to provide a power saving method and system arranged for pressure control of well fluids produced from wells in a hydrocarbon production field.

It is still another object of the present invention to provide a method and a system arranged for pressure control and for optimization of production from wells in a hydrocarbon production field.

It is yet another object of the present invention to provide a method and a system arranged for pressure control and for balancing of discharge pressures between wells in a hydrocarbon production field.

At least one of the above objects is met in a system arranged for pressure control of well fluid produced from wells in a hydrocarbon production field, the system comprising:

- a first pump in fluid communication with a first well and a second pump in fluid communication with a second well, the pumps arranged for receiving well fluid produced from the wells respectively and to deliver the fluid to downstream piping or equipment,

- the first and second pumps each comprising a motor/generator unit operable as a generator as the pump is driven by well fluid in power generation mode, and wherein the pump is driven in power consumption mode by operation of the motor/generator unit as a motor, wherein the pumps are operatively interconnected via a power distribution unit configured to distribute recovered power between the pumps or to other recipient.

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