Method and device for carrying out measurings and/or servicings in a wellbore or a well in the process of being drilled
AssigneeInstitut Francais du Petrole
InventorChristian Wittrisch
Life of this patent
Estimating the term…
Abstract
A method and a device for carrying out measurings and/or servicings in a wellbore or a well in the process of being drilled by means of electric connection linking the surface to an assembly fastened to the end of a drill string involve the use of an assembly comprising measuring and/or servicing means linked to a first connector integral with the assembly; a cable section comprising at the lower end thereof, a second connector and at the upper end thereof, a first intermediate connector integral with a support; and a cable linked to the surface comprising at the lower end thereof a second intermediate connector.
Claims17
A method for carrying out measurings and/or servicings in a wellbore or in a well in the process of being drilled, comprising the following stages:
- a) fastening to the end of a first pipe of a drill string, an assembly comprising measuring and/or servicing means, said means being electrically linked to a first electric connector integral with said assembly and accessible from the inside of a drill string,
- b) assembling the drill string by connecting end to end new drillpipes above said first pipe and lowering progressively into the well said assembly and the drill string as the drill string is assembled,
- c) introducing into said drill string, from the surface, a second electric connector adapted for connecting to the first connector, this second connector being mechanically fastened to the lower end of a cable section of non zero length comprising electric conductors and whose other end is fastened to a support adapted for being integral with said drill string and comprising a first intermediate electric connector,
- d) introducing into said drill string, from the surface, a second intermediate electric connector adapted for connecting to said first intermediate connector, this second intermediate electric connector being mechanically fastened to the lower end of a cable comprising electric conductors and electrically connected to the surface,
- e) connecting said second connector to the first connector,
- f) making said support of the first intermediate connector integral with said drill string,
- g) connecting said second intermediate connector to the first intermediate connector,
- h) carrying out the measurings and/or the servicing,
- i) disconnecting the second intermediate connector and taking it up to the surface by means of cable.
A method as claimed in any one of the previous claims, wherein said support holds said section substantially taut.
A device for carrying out measurings and/or servicings in a wellbore or a well in the process of being drilled, comprising in combination:
- an assembly fastened to a first pipe and comprising measuring and/or servicing means,
- a first electrical connector integral with said assembly and accessible from the inside of a drill string, said connector being electrically connected to said measuring and/or servicing means,
- said drill string connecting to the upper part of said first pipe,
- a cable section of non zero length comprising electric conductors, a second connector at the lower end thereof adapted for connecting to said first connector and a first intermediate connector at the other end thereof, said first intermediate connector being accessible from the inside of the drill string,
- a support of said intermediate connector adapted to be integral with said drill string, and
- a cable extending up to the surface, comprising electric conductors and at the end of which a second intermediate connector adapted for connecting to the first intermediate connector.
Dependencies are inferred from the claim text.