A North Sea field development included installation of long 4½-in. completion liners in the horizontal reservoir sections of each well. To minimize overall risk, the operator planned to use managed-pressure drilling (MPD). Despite the expected positive effects of MPD, a strong understanding of the downhole dynamics during deployment of the lower-completion liner was needed. To address this challenge, the operator installed a newly developed work-string-dynamics logging tool directly above the liner-hanger-running tools.
The logging tool is a compact and robust memory-based surveillance tool made for drillpipe-conveyed well operations. It is designed, manufactured, and maintained to be used without being a weak point in the string. The tool is equipped with an electronics package consisting of sensors, batteries, and memory.
The logging tool records
The logging tool is typically shipped to the rigsite ready to be run in the well. The rig crew treats the tool as though it is a standard drillpipe pup joint, eliminating the need for dedicated field personnel and increased personnel on board. After starting logging, the tool can log for 36 days continuously, enabling multiple installations on a single battery package.
The tool consists of three major components—a main body, housing, and a tool joint. The main body (inner mandrel) contains the electrical package with sensors. The housing protects the electrical package and is installed on the outside of the main body. The tool joint is mounted on the lower section on the main body. Axial loads on the tool are transferred through the main body and the tool joint; the housing is not exposed to axial loads. Torque is transferred through a robust spline system....
Overcoming Challenges and Optimizing Liner Deployment in Long Laterals
01 May 2017