US 2011/0297366 A1 · JUMPER

Abstract

A jumper for insuring electrical or fluid communication between the liner and the casing of an oil field downhole. The jumper has a first tubing adapted to be inserted in the liner, a second tubing adapted to be inserted in the casing and an anchor adapted to be rigidly mounted in the casing. The first and second tubings are composed of an electrically conductive material and are supported by the anchor with an insulated joint. Each of the first and second tubings has a plurality of centering devices, each consisting of a pair of rings surrounding the tubing and an array of bowed springs bridging between the rings and biased to bow outwardly from the tubing into engagement with the inner circumference liner or the casing, as the case may be. One of the two rings is electrically connected to the tubing, for example by welding, whereas the other ring is free to be displaced longitudinally of the tubing so that the outer diameter of the array of bowed springs may expand or contract, as needed. Each bowed spring in the array is provided with a series of electrical contacts which insure electrical conductivity between the welded ring and the surrounding liner or casing through the bowed spring.

Claims11

Dependent claims

An electrical jumper for an oil field downhole having a plurality of interconnected conduit sections including a hollow casing and at least one hollow liner, the bore of said at least one liner being longitudinally aligned with the bore of said casing, said jumper adapted to insure electric conductivity between said interconnected conduit sections and comprising:

a first tubing adapted to be inserted in a first conduit section,
a second tubing adapted to be inserted in a second conduit section,
said first and second tubings being composed of an electrically conductive material,
a plurality of centering devices mounted on each of said first and second tubings,
each centering device consisting of a pair of rings surrounding the tubing and an array of bowed springs bridging between the rings and biased to bow outwardly from the tubing into contact with the bore of the associated conduit section,
at least the first of said two rings being electrically connected to the tubing, and
each bowed spring of said array having electrical contacts connected to said electrically connected ring,
the second of said two rings being adapted to be displaced longitudinally of the tubing relative to said connected ring, so that the outer diameter of the array of bowed springs may expand or contract to maintain said electrical contacts in operative engagement with the bore of the associated conduit section.

5 more elements

A jumper for a downhole for extracting fluids from an underground formation, said downhole having at least two intercommunicating plurality of conduit sections including a hollow casing and at least one hollow liner, said jumper having two liners, one line adapted to be inserted into the bore of said at least one of said conduit section longitudinally aligned with the bore of an adjoining intercommunicating conduit sections, said jumper adapted to insure fluid communication between said conduit sections and comprising

a first tubing adapted to be inserted in a first conduit section,
a second tubing adapted to be inserted in a second conduit section,
centering devices mounted on each of said first and second tubings,
each centering device consisting of a pair of rings surrounding the tubing and an array of bowed springs bridging between the rings and biased to bow outwardly from the tubing into contact with the bore of the associated conduit section,
the first of said two rings being connected to the tubing, and
the second of said two rings being adapted to be displaced longitudinally of the tubing relative to said connected ring, so that the outer diameter of the array of bow springs may expand or contract to maintain said bowed springs in operative engagement with the bore of the associated conduit section.

3 more elements

Dependencies are inferred from the claim text.

Jumper

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Jumper

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Abstract

Claims11