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The Torque balanced and polymer encapsulated Wireline high pull cable was first introduced in 2012 with 18,000 lbs safe working load rating. The benefits it brought to Wireline Cable armor technological advances have led to a second generation of extreme pull high powered polymer encapsulated cables rated at 30,000 lbs, 9,000 lbs stronger than the highest available in the market today. To accomplish the full potential of the cable and convey wireline toolstrings with the highest efficiency and minimum sticking risk, a complete conveyance system has been developed around the cable. Further, the high pull capacity coupled with the latest generation high power and telemetry integrated acquisition system help avoid pipe conveyed operations, effectively reduce the number of descents with larger tool combinations and increase the logging speed. Substantial rig time savings and associated cost can then be achieved per logging program. In February-March 2016, the operator performed a wireline operation to evaluate an ultra-deepwater Gulf of Mexico well with 31,200 ft total depth. During the drilling process, multiple by-pass operations were needed to reach the targeted total depth. This led to a highly tortuous well path which would drastically increase the expected wireline cable friction in the wellbore leading to unprecedented high logging tensions around 21,000 lbs. The initially planned 26,000 lbs conveyance system would only offer a marginal overpull capacity to prevent and mitigate sticking risk. To avoid lengthy pipe conveyed alternative, the decision was made to deploy the field testing 30,000 lbs polymer encapsulated cable and associated conveyance system. The new cable allowed the successful logging operation in this highly challenging environment. The industry's highest pull capacity permitted avoiding the use of pipeline-conveyance logging (a time consuming, costly and risky operation) and reducing the number of descents by combining multiple tools in single descents, thereby decreasing operating time and associated rig cost. During descent #3, two wireline logging records were broken: highest normal logging tension of 21,200 lbs, and the highest pull ever in a logging operation of 29,361 lbs to free the logging cable, stuck during one of the stationary measurements. With the reservoir monitoring toolstring in sampling configuration (MDT) in the well and the limited pull capacity, a cut and thread fishing operation would have been unavoidable with any other conveyance system available in the industry at the time of logging. A four day fishing operation costing over 3 MUSD was thereby avoided while securing valuable reservoir sampling data during the sampling descent #3. The new second-generation high-pull system integrating extreme-strength polymer-encapsulated wireline cables, fit-for-purpose surface equipment and downhole conveyance accessories, has brought a step change in ultra-deepwater wireline conveyance operations. Tool fishing incidents are minimized while high-quality advanced wireline data acquisition is assured with reduced operational and HSE risk in any well trajectory or adverse wellbore conditions in well depths exceeding 40,000 ft.
The Torque balanced and polymer encapsulated Wireline high pull cable was first introduced in 2012 with 18,000 lbs safe working load rating. The benefits it brought to Wireline Cable armor technological advances have led to a second generation of extreme pull high powered polymer encapsulated cables rated at 30,000 lbs, 9,000 lbs stronger than the highest available in the market today. To accomplish the full potential of the cable and convey wireline toolstrings with the highest efficiency and minimum sticking risk, a complete conveyance system has been developed around the cable. Further, the high pull capacity coupled with the latest generation high power and telemetry integrated acquisition system help avoid pipe conveyed operations, effectively reduce the number of descents with larger tool combinations and increase the logging speed. Substantial rig time savings and associated cost can then be achieved per logging program. In February-March 2016, the operator performed a wireline operation to evaluate an ultra-deepwater Gulf of Mexico well with 31,200 ft total depth. During the drilling process, multiple by-pass operations were needed to reach the targeted total depth. This led to a highly tortuous well path which would drastically increase the expected wireline cable friction in the wellbore leading to unprecedented high logging tensions around 21,000 lbs. The initially planned 26,000 lbs conveyance system would only offer a marginal overpull capacity to prevent and mitigate sticking risk. To avoid lengthy pipe conveyed alternative, the decision was made to deploy the field testing 30,000 lbs polymer encapsulated cable and associated conveyance system. The new cable allowed the successful logging operation in this highly challenging environment. The industry's highest pull capacity permitted avoiding the use of pipeline-conveyance logging (a time consuming, costly and risky operation) and reducing the number of descents by combining multiple tools in single descents, thereby decreasing operating time and associated rig cost. During descent #3, two wireline logging records were broken: highest normal logging tension of 21,200 lbs, and the highest pull ever in a logging operation of 29,361 lbs to free the logging cable, stuck during one of the stationary measurements. With the reservoir monitoring toolstring in sampling configuration (MDT) in the well and the limited pull capacity, a cut and thread fishing operation would have been unavoidable with any other conveyance system available in the industry at the time of logging. A four day fishing operation costing over 3 MUSD was thereby avoided while securing valuable reservoir sampling data during the sampling descent #3. The new second-generation high-pull system integrating extreme-strength polymer-encapsulated wireline cables, fit-for-purpose surface equipment and downhole conveyance accessories, has brought a step change in ultra-deepwater wireline conveyance operations. Tool fishing incidents are minimized while high-quality advanced wireline data acquisition is assured with reduced operational and HSE risk in any well trajectory or adverse wellbore conditions in well depths exceeding 40,000 ft.
Due to adverse hole conditions, Operators in the Nam Con Son Basin have had difficulties carrying out their wireline logging programs. Unplanned wiper trips and pipe conveyed logging have often been necessary to acquire log data. These remedies are expensive and time consuming and lead to substantial inefficiencies during execution. In search for operational efficiency, a revolutionary conveyance technology was used with the wireline logging tools. The conveyance system consists of wheeled carriages which are secured to the exterior of the logging tool housings and aligned at regularly spaced intervals. The carriages have large diameter wheels with an active bearing lubrication system and carry the tool-string over and above wellbore cuttings. The wheels significantly reduce tool drag, facilitating conventional logging in very high angle wells. The carriwages orientate the logging tool sensors to enhance sample recovery and data quality. The holefinder consists of an upturned nose cone, analogous to a ski tip, which effortlessly slides over ledges without stopping. The intermediate logging operation continued over 5 days, during which 5 runs were made with up to nine carriages and a hole-finder on each tool string. All tool-strings ran seamlessly to TD and logged out smoothly without issues, facilitating excellent data acquisition. Following success in the intermediate hole section, the conveyance system was deployed on all wireline runs in both the main wellbore and sidetrack with similar results. The conveyance devices allowed the drilling and exploration team to achieve all of the pre-drill objectives while eliminating the unplanned costs experienced with previous logging programs. The conveyance system provides a cost effective method for managing high deviation wellbores while enhancing the operator's data acquisition needs for exploration evaluation. By avoiding pipe conveyed logging and wiper trips, 11 days of rig time was saved on a floating rig, with associated cost savings of USD 9.4M. Together, these complimentary devices form a complete conveyance system that uniquely resolve all the challenges that have plagued wireline logging for over 50 years while enhancing data quality. The technology also has applications in well intervention operations.
A new high-strength electrical release device has been developed that supersedes the typical weakpoint and achieves the same strength as the tool tension rating. A stronger release device facilitates running heavier tools on wireline, along with the ability to run significantly longer gun strings, which increases operational efficiency. The release device was subjected to a rigorous qualification program conducted to ensure the highest safety and reliability of this device under demanding conditions. This technology uses a motorized release that holds two sections together via retractable dogs. The release device operates using new telemetry protocols that are combinable and segregated from other communication schemes. An optional battery with a preset timer provides redundant control if electrical communication is lost during operations. After the electrical release signal is sent, the motor activates the release mechanism, enabling the device to separate, even with significant residual tension on the toolstring. Completion of rigorous qualification testing was necessary to confirm performance for the heavy load requirements and high shock levels characteristic of long perforating toolstrings. The new electrical release device has delivered flawless performance in seemingly impossible well programs. In field cases, the device was the optimal answer in providing a secondary release device that is high functioning in the harsh perforating environment. One case presents the completion of a project that involved the collaboration of six product lines. The release device was used with coiled tubing deployment of extremely long gun strings in a reservoir containing high H2S and CO2 content. The device enabled a significant reduction in the number of coiled tubing runs, which resulted in a significant increase in operational efficiency. Another application enabled the conveyance of large gun strings using wireline, which reduced the number of descents required and saved valuable time for the operator. These well programs were successfully completed because of the extreme engineering qualification achieved. For example, surface integration testing involved a maximum allowable gun string of more than 120 ft in a well to model downhole exposure. If this trend continues, it is possible that this device will change the future of wireline perforating operations. The new controllable electrical release device with exceptional strength enables the deployment of heavy tools and long guns on both coiled tubing and wireline. This will lead to efficiencies in well design as well as optimization and a higher standard in wireline perforating operations.
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