After performing extensive job simulations using several different well scenarios, Welltec mobilized to location. A 318 Well Tractor with three-wheel sections was determined to have the adequate force for conveying the perforation guns to the target depth. Proper job planning also took into consideration expected temperature of 270 F, friction forces, weakpoint rating and other parameters required to ensure high service quality for this long lateral. Additionally, a reverse circulating bit (Well Cleaner RCB) was brought to location as a contingency option if debris was encountered that prevented the tool string from reaching target depth.
After successful tool checks, the tool string was rigged up inside the lubricator. Once dropped past the heel on gravity the Well Tractor was powered up and the gun string was successfully conveyed ~ 11,000 ft through the horizontal section to the target depth of > 21,000 ft. After correlation, six guns were selectively fired and the tool string was pulled to surface. After rigging down, the client was now able to pump into the well and initiate the frac job.
From rig up to rig down, Welltec® performed this job in less than 12 hours and delivered the service with limited notice for the call-out. In addition to the increased efficiency, the job was performed at a lower cost and utilized a much smaller equipment footprint and crew, reducing emissions and increasing safety.