Abstract

The scope of this project was to intervene in highly deviated wells without the use of wireline electric tractors. The main objective of this case study is to provide a technology that allows operators and service companies to optimize their intervention strategy by lowering costs and increasing flexibility within the intervention planning process. This technology has verified that extended target depth is feasible with slackline operations, minimizing the use of expensive electrically powered conveyance systems and also the operational risk. In this novel the UK Patented technology enables all types of operations to be carried out with a universal design for any downhole tool-string, offering an agile supply chain opportunity to the good intervention industry. This novel conveyance roller used, requires no screws to assemble nor any special tools to service and redress between runs in the well. A patented interlock system was designed to retain all the components safely to reduce the risk of human error and also allow field service during each operation, as required. With its automotive design characteristics and its high conveyance performance, this technology can deploy tool-strings faster and safer. Its integrated novel stabilization rollers prevent the tool-string scoring or damaging the tubing during deployment, but also enable more runs per day to be completed. The results obtained in this case study have clearly demonstrated that this novel technology has fully delivered on the objectives set through a series of operations in Africa, India, and also South East Asia. In summary, the target depth was reached in all the deviated wells without the assistance of powered tractor(s). Operations were carried out using slackline toolstrings, which kept the operational costs to a minimum. The operators involved, completed operations with minimal use of e-line operations, saving up to approximately 90% in rental equipment and significant cost in operational time