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Downhole Wirefinder Tool with Power Unit

IP.com Disclosure Number: IPCOM000124864D
Publication Date: 2005-May-10
Document File: 1 page(s) / 19K

Publishing Venue

The IP.com Prior Art Database

Abstract

This present invention addresses the use of a downhole wirefinder with a downhole power unit. A downhole wirefinder tool, such as that disclosed in U.S. Patent Application 10/217,679, published on February 19, 2004 (Pub. No. 20040031604), uses a locator profile in the tubing string to expand the wirefinder fingers into the operating position. The wirefinder is then lowered to the top of the wire that is loose in the well and is "tapped down" to compress the loose wire into a configuration that can be fished with conventional wire fishing tools. Without the wirefinder, the loose wire may be extended over a very long region inside the casing and can't be fished with conventional tools. This wirefinder works well in tubing where locating profiles are available to expand the wirefinder fingers into the operating configuration. But, if profiles are not available or if the tool needs to travel from tubing into larger casing, the current technology may need improvement. In the present invention, a downhole power unit ("DPU"), such Model No. 146 DPU 11 sold by Halliburton Energy Services, Inc. or another suitable DPU, is coupled to the wirefinder. By attaching or otherwise coupling the DPU to the wirefinder, the wirefinder may be run to the target area and use the electromechanical power from the DPU to extend the power rod out and extend the wirefinder fingers into the operating configuration. By activating the wirefinder with the DPU, locating profiles are not needed and the wirefinder can travel from tubing into larger casing. After the wirefinder compresses the loose wire, the wirefinder and DPU can be retrieved to the surface with the wireline unit. The wirefinder fingers will retract to conform to the tubing ID after the job is completed. An advantage to this new approach is that the combination can travel in tubing and then be activated in casing with locating profiles. Any wireline fishing operation can use this tool. Slickline DPUs and Eline DPUs can be used to extend the wirefinder fingers at the target location in the well.

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DOWNHOLE WIREFINDER TOOL WITH POWER UNIT

This present invention addresses the use of a downhole wirefinder with a downhole power unit.

A downhole wirefinder tool, such as that disclosed in U.S. Patent Application 10/217,679, published on February 19, 2004 (Pub. No. 20040031604), uses a locator profile in the tubing string to expand the wirefinder fingers into the operating position. The wirefinder is then lowered to the top of the wire that is loose in the well and is "tapped down" to compress the loose wire into a configuration that can be fished with conventional wire fishing tools. Without the wirefinder, the loose wire may be extended over a very long region inside the casing and can't be fished with conventional tools. This wirefinder works well in tubing where locating profiles are available to expand the wirefinder fingers into the operating configuration. But, if profiles are not available or if the tool needs to travel from tubing into larger casing, the current technology may need improvement.

In the present invention, a downhole power unit ("DPU"), such Model No. 146 DPU 11 sold by Halliburton Energy Services, Inc. or another suitable DPU, is coupled to the wirefinder. By attaching or otherwise coupling the DPU to the wirefinder, the wirefinder may be run to the target area and use the electromechanical power from the DPU to extend the power rod out and extend the wirefinder fingers into the operating configuration. By activating the wirefinder with th...