QEP ENERGY COMPANY / MOUNTRAIL CO. / MCKENZIE CO. / OIL & GAS ND INC. / CONTINENTAL RESOURCES INC. / WILSON / WILLIAMS CO. / HRC OPERATING LLC / BOTTINEAU CO. / TRIANGLE USA PETROLEUM CORPORATION / WHITING OIL AND GAS CORPORATION / DENBURY ONSHORE LLC / HUNT OIL COMPANY / GAS (USA) INC. / TENNECO / DUNN CO. / STATOIL OIL & GAS LP / HESS BAKKEN INVESTMENTS II LLC / BOWMAN CO. / /