Torque-balanced, gas-sealed wireline cables

Patent metadata

Field	Value
Publication number	US-2018366240-A1
Application number	US-201816113705-A
Country	US
Kind code	A1
Filing date	Aug 27, 2018
Priority date	Apr 17, 2009
Publication date	Dec 20, 2018
Grant date	—

Abstract

A smooth torque balanced cable that includes an electrically conductive cable core for transmitting electrical power. The smooth torque balanced cable also has a first polymer surrounding said cable core. An inner layer of a plurality of first armor wires surrounds the cable core. The first armor wires being in partial contact with the first polymer and partial contact with a second polymer disposed opposite the first polymer.

First claim

We claim:

1 . A smooth torque balanced cable, comprising:
an electrically conductive cable core for transmitting electrical power; a first polymer surrounding said cable core; an inner layer of a plurality of first armor wires surrounding said cable core, said first armor wires being at least in partial contact with the first polymer and at least partial contact with a second polymer disposed opposite the first polymer; and an outer layer of a plurality of second armor wires surrounding said inner layer, said second armor wires having a stranded configuration, wherein interstitial spaces between the second armor wires are at least partially filled with a third polymer, and wherein the outer layer of a plurality of second armor wires is at least partially covered by the third polymer, and wherein the third polymer comprises ethylene-tetrafluoroethylene, and wherein coverage of the outer layer of armor wires over the inner layer of armor wires is less than or approximately equal to 88 percent, and wherein the second polymer separates the plurality of first armor wires from the plurality of second armor wires.

2 . The cable of claim 1 , wherein said first armor wires carry approximately 60 percent of a load applied to the cable.

3 . The cable of claim 1 , wherein at least a portion of the ethylene-tetrafluoroethylene is carbon-fiber reinforced.

4 . The cable of claim 1 , wherein the first polymer is fluorinated ethylene propylene.

5 . The cable of claim 1 , wherein the second polymer is ethylene-tetrafluoroethylene.

6 . The cable of claim 1 , wherein the third polymer is not chemically or physically bonded to armor wirers of the plurality of the second armor wires.

7 . The cable of claim 1 , wherein the first polymer is bond with the second polymer and the second polymer is bonded with the third polymer.

8 . The cable of claim 1 , wherein the first polymer comprises fluorinated ethylene propylene, and the second polymer comprises ethylene-tetrafluoroethylene, and wherein both the second polymer and third polymer also comprise carbon-fibers.

9 . The cable of claim 1 , further comprising at least one optical fiber in the electrically conductive cable core.

10 . The cable of claim 1 , further comprising annular array of shielding wires circumferentially disposed adjacent a periphery of the core.

11 . The cable of claim 1 , wherein coverage of the outer layer of armor wires over the inner layer of armor wires is from about 60 percent to about 88 percent.

12 . A method of conveying torque balanced cable into a wellbore:
connecting a cable to downhole equipment, wherein the cable comprises an electrical conductive core and at least a smooth outer jacket; passing the cable and downhole equipment through pressure control equipment, wherein a seal is formed between the smooth outer jacket and a rubber pack-off, and the running of the cable into the wellbore is done without the use of grease in the pressure control equipment, and wherein the torque in the cable is balanced.

13 . A method of forming a cable, the method comprising:
providing an electrically conductive cable core for transmitting electrical power; surrounding the cable core with a first polymer material; providing a plurality of first armor wires and winding the first armor wires around the first polymer to form an inner layer of armor wires imbedded in the first polymer; and providing a second polymer about the inner layer of first armor wires; providing a plurality of second armor wires and winding the second armor wires around the inner layer to form an outer layer of armor wires, wherein coverage of the outer layer of armor wires over the inner layer of armor wires is less than or approximately equal to 88 percent, and wherein the second polymer separates the plurality of first armor wires from the plurality of second armor wires.

Assignees

• Schlumberger Technology Corp

Inventors

• Varkey Joseph
• Chang Sheng
• Kim Byong Jun
• Yun Jushik
• Altintas Burcu Unal

Classifications

• H01B13/02

  Stranding-up · CPC title

• H01B7/046 Primary

  attached to objects sunk in bore holes, e.g. well drilling means, well pumps · CPC title

• H01B13/24

  by extrusion {(extrusion of cables with plastic material in general B29C48/15)} · CPC title

• H01B7/1895

  Internal space filling-up means · CPC title

• Y10T29/49117

  Conductor or circuit manufacturing · CPC title