HPHT environment requires reliable, high-strength completion systems ///
In 2010, the Duvernay formation in Western Canada was unchartered territory. With an estimated 73 Bbbl of oil and natural gas liquids, and 443 Tcf of natural gas in this unconventional shale play, the return on investment could be substantial1; but at depths ranging from 2,000–4,000 m, the challenge of extraction is nearly as daunting. Early in the play’s development, wells were completed using standard equipment rated to 10,000 psi. However, high formation breakdown pressures forced an operator to push a fracture treatment to 12,000 psi, well over the tool’s 10,000-psi maximum rating. After encountering problems in subsequent stages, the operation was shut down, due to downhole tool failure. It was obvious that tools with higher pressure ratings would be required to stimulate wells in the area.
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