Products - Drill Collars
Stabil Drill steel drill collars are made from AISI 4145-modified alloy steel, heat-treated to API standards with 3 1/8" to 11" ODs.
The standard drill collar length is 31' 6" . For outside diameters larger than 4", slip or elevator recesses can be cut according to API-recommended practice RP7G. Connections are cut with standard API relief features, cold rolled and kemplated.
For enhanced resistance to corrosion on non-magnetic collars, Stabil Drill applies a mechanical bore treatment (RSC or roller burnishing) and shot peening on outside diameters.
Stabil Drill's new exclusive process "MAGCOAT" can also be applied to all non-magnetic equipment to extend tool life and reduce galling by up to 99%.
Stabil Drill non-magnetic drill collars are usually manufactured slick. Spiraling can be added upon request. In addition, the collars can be manufactured with a scribe line and an interface for top landing.
Stabil Drill also offers a non-magnetic flex collar to be used in conjunction with MWD collars in three nominal sizes (3 1/2" , 5" and 6 5/8" ).
Machining of end connections is done on one of Stabil Drill's CNC machines with constant profile cutting tools. Thread profile, lead, depth, taper and stand-off are constantly inspected during and after machining.