Case Study Single-Trip Perforating and Frac-Packing Completion Saves 1.5 Rig Days Offshore Nigeria
Single-trip perforating and frac-packing completion saves 1.5 rig days offshore Nigeria.
Tubing-conveyed perforating (TCP) completion techniques enable perforating very long intervals in one run—some TCP strings have exceeded 8,000 ft [2,440 m] in length—and in highly deviated and horizontal wells, TCP is the only means of accessing the perforating depth. TCP also facilitates running large guns and using high underbalance. When TCP is deployed in conjunction with drillstem test (DST) tools, well fluids can be easily controlled. Without having to kill the well, TCP strings can be retrieved (shoot and pull) or left as part of the permanent completion (integrated TCP).
Circulating and isolation subs for debris prevention
The debris-circulating sub consists of a ceramic cone seated in a ported sub, usually positioned between the packer and the guns, typically 30 ft above the firing head.
The fluid/debris isolation sub is an enhancement of the standard cone-type debris-circulating sub for heavy mud environments or large amounts of debris.
Side-mounted perforating gun system