Schlumberger

ProLATCH Wellhead Retrieval System

Overview Library

Reliable, single-trip recovery of surface casing and wellhead

The ProLATCH wellhead retrieval system combines a high-performance wellhead spear, hydraulic pipe cutter, and nonrotating stabilizers to recover surface casing and subsea wellheads for plug and abandonment operations.

Simplify mechanical abandonment operations

The ProLATCH wellhead retrieval system eliminates the need for a marine swivel and ‭a long drill collar string, and reduces workstring handling time. Once ‭engaged, the system can retrieve both the surface casing and the ‭subsea wellhead. ‭‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

Reliable recovery of surface casing and wellhead ‭‬‬‬‬

The ProLATCH system hydraulic pipe cutter ‭severs the casing, and a pressure indication confirms that the cut has been ‭successful, eliminating the possibility of the cutter being pulled ‭out of the hole before the cutting operation is complete. Once the casing is ‭severed, the ProLATCH system wellhead spear remains engaged to ‭recover the surface casing, wellhead, and guide base to the surface. ‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

The system can be operated using a topdrive for rotary cutting operations ‭or deployed with a positive displacement motor (PDM). In offshore operations, weight does not have to be slacked off on to a marine swivel, thereby reducing the bowing effect in the workstring. This reduces the risk of rotating bending fatigue failures.‬‬

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Comprehensive Plug and Abandonment Systems
ProMILL, ProLATCH, and ProCISE systems bring single-trip efficiency to well abandonment milling, cutting, and retrieving operations. Download brochure (11.06 MB PDF)