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AssigneeIfp Energies Nouvelles
InventorsBruno GARCIA, Miguel GARCIA, Claudio FERNANDES-MARTO, Virgile ROUCHON
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The invention is a device for sampling fluids under pressure from a well which comprises a chamber for retaining the fluid within a sample chamber (01). The chambers includes a first piston which allows or prevents fluid inflow into the lower part of the chamber. The first piston is displaced by means comprising an elastic element (20) disposed in a chamber filled with oil and connected to the piston by a rod (04). Sampled fluid transfer means allows control of the descent of a second piston (02) from the upper part to the lower part of the chamber so that the fluid remains at constant pressure in chamber during the transfer.
A device for sampling fluids under pressure from a well, comprising a sample chamber (01) defining an inner volume intended to receive the fluid, a body (10, 03, 08) above said sample chamber, circulation means for circulating the fluid in said chamber, means for keeping the fluid in said chamber and means for transferring the fluid out of said chamber, characterized in that:
A device as claimed in any one of the previous claims, wherein said sample chamber (01) is closed in the lower part thereof by an end piece (06) provided with at least a first port, end piece (06) having a length enabling first piston (05) to allow passage of a fluid into said sample chamber (01) via said first port when said elastic element (20) is compressed.
A device as claimed in any one of the previous claims, wherein said circulation means comprise at least a first port allowing fluid to flow out from the upper part of said chamber and at least a second port on said end piece (06).
A device as claimed in any one of the previous claims, wherein said body (10, 03, 08) comprises at least one tube (10, 03, 08), said body comprising said elastic element (20) and means (07, 22, 09, 23) for relaxing or compressing said elastic element (20).
A device as claimed in any one of the previous claims, wherein said elastic element (20) is a spring or a set of Belleville washers.
A device as claimed in any one of the previous claims, wherein said end piece (06) can be removed from said sample chamber (01) and replaced by an end piece (13) without a port allowing said first piston (05) to be kept within said chamber.
A device as claimed in any one of the previous claims, wherein said first piston (05) is equipped with a needle valve (25) and with a high-pressure connection allowing said fluid to be discharged from said sample chamber (01).
Use of the device as claimed in any one of the previous claims, wherein the development of an underground geological site is monitored by sampling fluid under pressure by means of a monitoring well, characterized in that the following stages are carried out:
Dependencies are inferred from the claim text.