Apparatus for obtaining wellbore pressure measurements
AssigneeZiebel AS
InventorNeil Gardner
Life of this patent
Estimating the term…
Abstract
The present invention concerns apparatus (1) for obtaining distributed pressure measurements in a wellbore (2), the apparatus (1) comprising: a flexible rod (10; 110) arranged to be disposed in the wellbore (2); and an elongate sensing member (15; 115) extending along the rod, the sensing member comprising at least one optical sensing fibre member (16; 116) arranged to afford a continuous length of sensing capability, wherein the sensing member extends in a groove formed in the exterior surface of the rod.
Claims25
An apparatus for obtaining distributed pressure measurements in a wellbore, the apparatus comprising:
- a flexible rod arranged to be disposed in the wellbore;
- and
- an elongate sensing member extending along the rod, the sensing member comprising at least one optical sensing fibre member arranged to afford a continuous length of sensing capability, wherein the sensing member extends in a groove formed in the exterior surface of the rod;
- wherein the optical sensing fibre member is combined with at least one supporting fibre in an elongate sensing member, wherein the elongate sensing member is provided along the rod in parallel with the longitudinal axis of the rod;
- and
- wherein the optical sensing fibre member is twisted or braided in combination with the supporting fibre in the elongate sensing member.
A rod for use in a wellbore for obtaining distributed pressure measurements, the wellbore containing wellbore fluid, the rod having an elongate retaining means for retaining an elongate sensing member, the elongate sensing member comprising at least one optical sensing fibre member for sensing a pressure in the wellbore fluid, the retaining means comprising a groove formed in the exterior surface of the rod and being configured to communicate wellbore fluid pressure to the optical sensing fibre member along its length within the retaining means;
- wherein the optical sensing fibre member is combined with at least one supporting fibre in an elongate sensing member, wherein the elongate sensing member is provided along the rod in parallel with the longitudinal axis of the rod;
- and
- wherein the optical sensing fibre member is twisted or braided in combination with the supporting fibre in the elongate sensing member.
Dependencies are inferred from the claim text.