Artificial Lift Equipment Power Cables

• US 20130306348A1
• Filed: 05/14/2013
• Published: 11/21/2013
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Holzmueller, Jason, Manke, Gregory H., Metzger, Mark A., Ver Meer, Melissa, Ma, Patrick Zhiyuan, Datta, Sayak
• Granted Patent: US 9,336,929 B2
• Time in Patent Office: Days
• US Class Current: 174/105.R
• CPC Class Codes: E21B 43/128 Adaptation of pump systems with down-hole electric drives
• CPC Class Codes: H01B 7/046 attached to objects sunk in bore holes, e.g. well drilling means, well pumps
• CPC Class Codes: H01B 9/02 with screens or conductive layers, e.g. for avoiding large potential gradients

Abstract

A power cable for artificial lift equipment can include one or more conductor assemblies, each including a copper conductor, a conductor shield with resistivity less than about 5000 ohm-m surrounding the conductor, insulation, an insulation shield having a resistivity less than about 5000 ohm-m surrounding the insulation, a metallic shield surrounding the insulation shield, and a polymer barrier surrounding the metallic shield. Such a cable may include a jacket molded about the one or more conductor assemblies and optionally armor surrounding the jacket. Various other apparatuses, systems, methods, etc., are also disclosed.

Claims

1. A power cable for artificial lift equipment, the power cable comprising:

one or more conductor assemblies, wherein each conductor assembly comprises

a copper conductor,

a conductor shield with resistivity less than about 5000 ohm-m surrounding the conductor,

insulation,

an insulation shield having a resistivity less than about 5000 ohm-m surrounding the insulation,

a metallic shield surrounding the insulation shield, and

a polymer barrier surrounding the metallic shield;

a jacket molded about the one or more conductor assemblies; and

armor surrounding the jacket.

2. The power cable of claim 1 wherein each of the one or more conductor assemblies comprises EPDM.

3. The power cable of claim 1 wherein each of the one or more conductor assemblies comprises PEEK.

4. The power cable of claim 1 wherein each of the one or more conductor assemblies comprises lead (Pb).

5. The power cable of claim 1 wherein each of the one or more conductor assemblies comprises PTFE.

6. The power cable of claim 1 wherein the jacket comprises at least one member selected from a group consisting of EPDM, nitriles, HNBR, fluoropolymers, and chloroprene.

7. The power cable of claim 1 wherein the armor comprises at least one member selected from a group consisting of metals and metal alloys.

8. The power cable of claim 1 wherein the armor comprises multiple layers of armor.

9. The power cable of claim 1 wherein the armor comprises helically spun armor.

10. The power cable of claim 1 wherein the copper conductor comprises a compacted stranded copper conductor and wherein the conductor shield comprises an extruded conductor shield that penetrates spaces in the compacted stranded copper conductor.

11. The power cable of claim 1 wherein the conductor shield and the insulation comprise co-extruded or tandem extruded materials.

12. The power cable of claim 1 wherein each of the one or more conductor assemblies comprises nanoscale fillers.

13. The power cable of claim 1 wherein the insulation comprises PEEK or EPDM.

14. The power cable of claim 1 wherein the metallic shield comprises lead (Pb).

15. The power cable of claim 1 wherein the polymer barrier comprises PTFE tape helically taped for surrounding the metallic shield.

16. The power cable of claim 1 wherein the armor comprises a circular cross-section or a polygonal cross-section.

17. A power cable for downhole equipment, the power cable comprising:

a copper conductor;

a conductor shield with resistivity less than about 5000 ohm-m surrounding the conductor;

insulation;

an insulation shield having a resistivity less than about 5000 ohm-m surrounding the insulation;

a metallic shield surrounding the insulation shield;

a polymer barrier surrounding the metallic shield;

a braided layer surrounding the metallic shield; and

armor surrounding the braided layer.

18. The power cable of claim 17 wherein the insulation comprises EPDM.

19. The power cable of claim 17 wherein the insulation comprises PEEK.

20. A method comprising:

providing a conductor;

providing a semiconductive material;

providing an insulating material;

extruding a portion of the semiconductive material onto the conductor;

extruding the insulating material onto the semiconductive material; and

extruding another portion of the semiconductive material onto the insulating material.