DESCRIPTION
Threaded coupling connection, Ø168–178 mm
APPLICATION
Production string, liners, tail pipes, heavy-wall production string, heavy-wall intermediate string, rotation while cementing, water injection, steam-injection wells
DESIGN FEATURES
C100HT is a gas tight coupling connection for casing with a patented cone-to-cone seal profile. It is a modification of C100 and features increased ultimate make-up torque.
OPERATIONAL FEATURES
In oil and gas wells, the С100HT thread connection ensures gas tightness under the following ultimate loads:
- External pressure—100% as per API5C3;
- Internal pressure—100% of pipe body;
- Tensile load—100% of pipe body;
- Compressive load—70% of pipe body (depending on the standard size);
- Dogleg severity—up to 20°/100 ft (depending on the standard size).

TESTING
- Bench testing for gas tightness and axial failure load, VNIITneft OOO, Samara;
- Ultimate make-up torque testing, Weatherford, Orenburg
DESIGN ADVANTAGES
- Patented seal profile providing the retention of gas tightness under combined and reversal loads;
- Special design of the pin tip provides for high ultimate make-up torque;
- Trapezoidal thread profile combined with optimized design of the seal and shoulder providing the retention of gas tightness under dogleg severity of up to 6°/10 m;
- Internal flushness