английский => русский Техника Нефтепромысловые науки и технологии oilfield drilling

For over 25 years, NOV Grant Prideco has taken the lead in the development of rotary-shouldered connections. The double-shouldered HI-TORQUE® (HT) connection is still a high-performance workhorse of the drilling industry. Even so, the HT design was based on API thread forms, ultimately limiting performance. The XT® design departed from the constraints of API with an improved thread form and reduced taper. This design optimization resulted in additional improvements in torque capacity and streamlined profiles. For completions, under-balanced drilling (UBD) and other pressure sensitive operations, the Grant Prideco® XT-MTM connection provided the industry's first pressure rated rotary-shouldered connection.