This case study will examine the removal of an obstruction in Well BC-14 on the Shell operated Brent Charlie platform. Obstructing access to the well was a 3.6″ OD wireline roller bogie cutter, 6600ft of 0.125″ wire, a slickline tool string and a 4-1/2″ PES HE-3 bridge plug complete with setting tool. The fish had been in the well for three and a half years with the condition of the wire lost down hole undetermined, in addition the well had tubing to 'A' annulus communication. The operational objective was to remove all obstructions from the well in order to allow access to set a plug and secure well integrity.
This paper will detail the operation while highlighting the limiting factors and challenges overcome as well as demonstrate how the use of Heavy Duty Wireline Fishing (HDWF) equipment and downhole tools, in conjunction with detailed planning, provided a cost effective solution to alternative options such as Coiled Tubing.
The successful utilization of HDWF techniques were applied with no lost time or safety incidents and resulted in the complete recovery of well obstructions, allowing the well to be plugged and its' integrity to be regained.