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Internal Cable Coiled Tubing Re-deployment and Test Method

IP.com Disclosure Number: IPCOM000130420D
Publication Date: 2005-Oct-24
Document File: 1 page(s) / 11K

Publishing Venue

The IP.com Prior Art Database

Abstract

When ESP systems are deployed into oil wells using Coiled Tubing With Internal Power Cable, the coil is not cut and terminated until tests have been conducted to assure that the pump has properly "landed" in the polished bore located down hole to receive the pump. Such testing is done thru the coil that is on the reel, thru the wellhead providing power to the pump (to start it if needed temporarily to build pressure). Instrumentation lines are also usually provided along the power cable to verify proper operation of the downhole unit. Once proper landing of the unit has been verified, the tubing is cut, the end is terminated in the well head and the connections are completed for normal operation and monitoring of the system. Eventually the need will arise to replace the pump. At that time a method is needed to temporarily connect to the electrical components and to the outer coil itself. Such connection must be the same approximate size as the original coil so that it will pass thru the injector and have sufficient strength to suspend the coil and pump in the well. Once the temporary connection and the original coil are removed from the well and the pump has been replaced or serviced, the system can be re-run into the well and tested thru the special re-deployment coil to verify correct placement. The temporary connection can be removed and the well head connections restored for normal operation.

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Title:

Internal Cable Coiled Tubing Re-deployment and Test Method

Abstract of the Invention:

When ESP systems are deployed into oil wells using Coiled Tubing With Internal Power Cable, the coil is not cut and terminated until tests have been conducted to assure that the pump has properly "landed" in the polished bore located down hole to receive the pump. Such testing is done thru the coil that is on the reel, thru the wellhead providing power to the pump (to start it if needed temporarily to build pressure). Instrumentation lines are also usually provided along the power cable to verify proper operation of the downhole unit. Once proper landing of the unit has been verified, the tubing is cut, the end is terminated in the well head and the connections are completed for normal operation and monitoring of the system. Eventually the need will arise to replace the pump. At that time a method is needed to temporarily connect to the electrical components and to the outer coil itself. Such connection must be the same approximate size as the original coil so that it will pass thru the injector and have sufficient strength to suspend the coil and pump in the well. Once the temporary connection and the original coil are removed from the well and the pump has been replaced or serviced, the system can be re-run into the well and tested thru the special re-deployment coil to verify correct placement. The temporary connection can be removed and the well head connections restored for norm...