Case Histories

Application: Electric-line Logging and Perforating - Middle East
Equipment: Mono-conductor and Perforating Roller Bogie Tools
Various Mono-conductor Electric-Line and Perforating Roller Bogie tools were used to convey reservoir saturation, cement bond log and perforating toolstrings at a wellbore angle of eighty seven (87°) degrees. These toolstrings were all deployed under gravity using Roller Bogie tools without the need for more expensive intervention techniques such as coiled tubing or wireline tractor. The cost savings, together with reduced personnel requirement and a much lower exposure to overall risk has ensured that the Roller Bogie conveyance system is now regarded as this client's first choice intervention product when faced with challenging wellbore access.

Application: Roller Bogie tools out-perform intervention simulation - North Africa
Equipment: Slickline and Low Loader Roller Bogie Tools
A combination of Slickline Roller Bogie tools and a Low Loader Roller Bogie jar successfully deployed a selective test tool, setting a production packer at a depth of 13,600 feet and 68 degrees deviation during the installation of a new completion. Using standard roller stem friction coefficients to model the intervention, simulation software had predicted a risk to wire integrity, with a pulling weight close to breaking strain, and had recommended the use of coiled tubing. In the event, the Roller Bogie toolstring was deployed successfully and the actual maximum overpull was recorded at only 35% of the predicted value. All intervention operations were performed successfully and all operational objectives were achieved without incident.

Application: Changing gas lift valves in deviated wells - Southeast Asia
Equipment: Slickline Roller Bogie Tools, Low Loaders & Enhanced Performance Kickover Tools
A customer has a number of production wells equipped with gas lift mandrels set at depths below 9,000ft and at deviations greater than 70 degrees. Intervention operations to service these mandrels had always been problematic and sometimes simply impossible. In one particular well, several previous attempts had failed to locate and change out a valve in a mandrel was set at 77 degrees - a combination of Roller Bogie tools and Wireline Engineering's Enhanced Performance Kickover Tool was used to deliver immediate and the valve was changed out first time with no mis-runs. The Low Loader Roller Bogie jar has now been included to provide reliable jarring in what has become the standard toolstring used in these gas lift operations.

Applications: Roller Bogie tools greatly reduce perforating time - Middle East
Equipment: Mono-conductor and Perforating Roller Bogie Tools
A combination of Electric-Line and Perforating Roller Bogie tools has become a standard part of wireline logging and perforating toolstrings in deviated offshore wells for a Middle East customer. Roller Bogie tools are used to eliminate frictional drag, allowing much longer perforating gun assemblies to be run and retrieved. This has reduced the time taken to complete perforating operations by almost 50% in each well, resulting in large cost savings.