System and method for sensing a parameter in a wellbore
AssigneeSchlumberger Technology Corporation
InventorsArthur H. Hartog, Hubertus V. Thomeer, Martin E. Poitzsch, Benjamin P. Jeffryes
Life of this patent
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Abstract
A technique enables sensing one or more wellbore parameters along a specific well zone. A section of instrumented coiled tubing is provided with a sensor array extending along its exterior. The sensor array is designed to sense well fluid related parameters and may comprise an optical fiber sensor. A cross-over allows the sensor array to communicate with a surface location via a control line routed along a coiled tubing interior.
Claims23
A system for sensing a wellbore parameter, comprising:
- a coiled tubing having an internal optical fiber disposed within the coiled tubing;
- an instrumented section of coiled tubing having a recess extending along its length;
- an optical fiber disposed in the recess;
- a mechanism to hold the optical fiber along a tubing wall surface of the instrumented section of coiled tubing to facilitate distributed sensing of at least one desired parameter;
- a cross-over through which the optical fiber extends to the internal optical fiber;
- and
- a coiled tubing connector having an optical fiber passage, wherein the connector is able to communicate data via non-contact telemetry.
A system for sensing a wellbore parameter, comprising:
- a coiled tubing having an internal optical fiber disposed within the coiled tubing;
- an instrumented section of coiled tubing having a recess extending along its length;
- an optical fiber disposed in the recess;
- a mechanism to hold the optical fiber along a tubing wall surface of the instrumented section of coiled tubing to facilitate distributed sensing of at least one desired parameter;
- a cross-over through which the optical fiber extends to the internal optical fiber;
- and
- a coiled tubing connector having an optical fiber passage, wherein the coiled tubing connector comprises one of a side exit sub and a T-joint sub.
A system for sensing a wellbore parameter, comprising:
- a coiled tubing having an internal optical fiber disposed within the coiled tubing;
- an instrumented section of coiled tubing having a recess extending along its length;
- an optical fiber disposed in the recess;
- a mechanism to hold the optical fiber along a tubing wall surface of the instrumented section of coiled tubing to facilitate distributed sensing of at least one desired parameter;
- a crossover through which the optical fiber extends to the internal optical fiber;
- and
- wherein the mechanism comprises a potting material.
A method of sensing in a wellbore, comprising:
- forming an instrumented section of coiled tubing;
- holding an optical fiber at a position to sense at least one well parameter along an exterior tubing surface of the instrumented section of coiled tubing;
- and
- routing the optical fiber through a crossover to a coiled tubing interior;
- and
- pumping a well fluid along the instrumented section of coiled tubing and adjusting the pumping of well fluid based on distributed measurements of the at least one well parameter.
A system for using in a wellbore, comprising:
- a section of coiled tubing that may be coupled with a standard coiled tubing in a well string;
- a sensor array positioned at an outside surface of the section of coiled tubing along the length of the section of coiled tubing, the section of coiled tubing having a diameter extending through the sensor array that is the same as the diameter of the standard coiled tubing;
- and
- a crossover through which the sensor array is coupled to an interior control line within the standard coiled tubing.
Dependencies are inferred from the claim text.