Well probe able to be uncoupled from a rigid coupling connecting it to the surface
AssigneeInstitut Francais du Petrole, Total Compagnie Francaise des Petroles, Compagnie Generald de Geophysique, Service National Dit: Gaz de France, Societe Nationale Elf Aquitaine (Production)
InventorJean Czernichow
Life of this patent
Estimating the term…
Abstract
A well probe including two offset shoes fixed outside of a tubular column and an intermediate shoe provided with a central passage having a cross section larger than a cross section of the column. The intermediate shoe is connected to a lower offset shoe by a mobile hasp. A mobile harness is adapted to be moved into and out of a lateral cavity of the intermediate shoe for enabling coupling and uncoupling of the intermediate shoe with a wall of the well. The mobile harness includes a casing for accommodating sensors and a hydraulic triggering arrangement, with the sensors and the hydraulic triggering arrangement being connected to a surface installation by cables and an electronic cartridge.
Claims13
A well probe adapted to be mechanical uncoupled from a rigid linking member connecting the well probe to a surface installation, the well probe comprising:
- at least two offset shoes fixed around the rigid linking member at a distance from each other;
- a mobile harness including at least one intermediate shoe disposed around the rigid linking member between the offset shoes, said intermediate shoe including a central passage having a cross-section larger than a cross-section of the rigid linking member, and at least one measuring casing associated with the intermediate shoe;
- means for laterally retractably displacing said measuring casing with respect to said intermediate shoe and said rigid linking member to couple and uncouple the measuring casing with a portion of a well;
- and
- conductive means for connecting the measuring casing to a recording unit,
- wherein said two offset shoes are arranged in such a manner so that, in an anchoring position in the well, the rigid linking member is centered in said central passage of the intermediate shoe so as to suppress any direct contact between the intermediate shoe and the rigid linking member.
Dependencies are inferred from the claim text.