Volumetric pump driven by a continuous tube
AssigneeInstitut Francais du Petrole
InventorHenri Cholet
Life of this patent
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Abstract
This invention relates to a system for pumping an effluent that is produced by a geological formation, in which a rotary pump (3) is installed and driven in rotation by a continuous tube (12) that rises up to the surface. The tube makes it possible to inject a fluid, for example, a liquefier or a lubricant. This invention also relates to a pumping method in which rotor (24) of the pump is installed with a continuous tube (12), of the "coil tubing" type.
Claims11
A method of pumping an effluent that is produced by a well that is drilled into a geological formation, in which pumping means (3) that comprise a rotor (24) and a stator (27) are placed at the base of a column (2) that is submerged in said effluent, characterized in that it comprises the following stages:
- winding a continuous tube (12) onto a drum (33) said tube having means of diffusion (23) and said rotor (24) attached to one end of said continuous tube (12),
- lowering said means of diffusion and said rotor into the inner space of said column (2) by unwinding said tube (12) from drum (33),
- said rotor is placed in the stator, with said means of diffusion being located in the vicinity of the output of the pump,
- said tube is driven in rotation to activate the pump.
A system suitable for pumping an effluent that is produced by a well that is drilled into a geological formation, comprising:
- a pump (3) comprising a rotor (24) and a stator (27),
- a coilable column (2) adapted to be submerged in said effluent said pumping means being disposed at the base of the column,
- a continuous coilable tube (12) adapted for winding in a coil on a drum (33), with said tube being in the inner space of said column and being integral with the rotor,
- means (23) for diffusing attached to the end of said tube (12), with the diffusing means 23 being placed between the rotor (24) and said tube (12),
- means (43, 44) for driving the tube (12) in rotation to activate the pump (3), and
- means for fixing the stator (27) to the base of the column (2).
Dependencies are inferred from the claim text.