Coiled-tubing cementing operation on HPHT well uses MPD technique to lower costs, ensure integrity

The number of exploration wells drilled in high-pressure, high-temperature (HPHT) environments keeps growing, spurred by the ongoing search for new oil and gas reserves. Per the Norwegian Standards Organization (NORSOK), an HPHT well has a wellhead shut-in pressure exceeding 69 MPa (10,000 psi) and an ambient temperature greater than 150°C (302°F). These operating conditions present a number of well construction challenges, many related to the narrow window between pore pressure and fracture pressure. Keeping a well within this window is a significant challenge for conventional drilling and completions techniques.