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Apparatus and method for supplying electric power to cable suspended submergible pumps
| Details |
Inventors: Brookbank, III, Earl B.;
Assignee: TRW, Inc. (Cleveland, OH)
Primary Examiner: Askin; Laramie E.
Assistant Examiner:
Attorney, Agent or Firm: Shapiro and Shapiro
Electric power is supplied to downhole equipment, such as a submergible pump, by a power cable that is joined to a support cable by a cable carrier as the carrier and cables are fed into a well. The carrier comprises laterally displaced resilient clamping sections that are clamped about respective cables to form a continuous assembly, and the assembly is fed into the well as the equipment is installed. |
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DETAILED DESCRIPTION OF THE INVENTION As shown in FIGS.
1 and 2, a cable assembly 10 in accordance with the invention comprises an electrical power cable 12 and a support cable 14 joined by a cable carrier 16.
The power cable may be a conventional type comprising a plurality of insulated current-carrying conductors 18 appropriately supported in an outer sheath 20, which may be armored.
The support cable 14 may be a conventional type including helically twisted bundles of steel wire 22.
In the form shown, the cable carrier 16 comprises laterally displaced resilient clamping sections 16A, 16B formed from a continuous strip of metal.
The cable carrier has an S-shaped cross-section providing openings 24 and 26 at opposite sides thereof.
The clamping sections 16A, 16B, may be spread to enlarge the openings 24 and 26 to permit the insertion of cables 12 and 14 into the clamping sections laterally.
To provide additional bending flexibility in planes normal to axial planes and to reduce weight, the cable carrier sheet material may be slotted as shown at 28.
The carrier may be embossed as shown at 30 to provide better spring tension for gripping various cables.
A preferred method for forming the assembly 10 is illustrated in FIG.
3.
Continuous lengths of the cables 12 and 14 and the carrier 16 are fed (as indicated by the arrows) from drums, for example (not shown).
Support cable 14 passes over a crown sheave 32 and then moves downwardly to a cable horn 34.
The carrier 16 passes over an idler sheave 36 and is then advanced to the cable horn 34, passing between the cable horn and a backing roller 38 (which may have an appropriate concave outer contour).
Wedge portion 34a of the cable horn (FIG.
4) spreads the clamping section 16B, so that the support cable 14, which passes through a hole 34b in the cable horn, may enter section 16B through opening 26.
A groove 34c may be provided on the surface of the cable horn to engage an edge of the carrier 16B and help guide the carrier along the cable horn
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