Integrated Services
Geotechnical Surveying
Subsea Engineering
Casing & Tubing Running
Pipe Inspection & Repair
Directional Drilling
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Directional Drilling

COSL can provide a wide variety of engineering designs and onsite operation with mud motor and RSS, and other down-hole tools, in addition to offering directional and trajectory measuring services via electronic single/multi-shot and gyroscope. The operation areas include Offshore China and the Southeast Asia. The key clients are CNOOC, Sinopec, China United Coalbed Methane Co. Ltd., PNOC, Conoco-Phillips and Anadarko. COSL proprietary RSS, WELLEADER®, has proven excellent wellbore trajectory-control performance, helping customers effectively improve overall drilling efficiency while significantly reducing drilling costs.

The main services include:

offshore cluster-well with big platform and small well spacing

horizontal well drilling

extended reach drilling (ERD)

twinhole-in-monobore drilling

3D multi-target directional drilling

slim-hole directional drilling

sidetracking, and other methodologies