Permian Basin, East Texas provide initial fields for new-design land rig

Posted on 23 August 2012

Two of Globe Energy Services’ Mustang 600 Class rigs are operating in the Permian Basin. The rig features a mast with 116 ft of clearance and an adjustable drilling floor.

By Katie Mazerov, contributing editor

Globe Energy Services has designed a five-axle land rig providing quick rig-up/rig-down operations, a mast with 116 ft of clearance and an adjustable drilling floor. Two of the new Mustang 600 Class rigs have been deployed to the Permian Basin for unconventional oil shale wells, and a third is working in the Kilgore gas field in East Texas. A fourth rig will be added this fall, also to the Kilgore field. Opportunities to deploy additional rigs to the Bakken and Eagle Ford are possible as well, according to Johnny Slaughter, vice president of well services. “The taller mast is a key element of this new rig, because the operator can rig up and clear the wellhead control equipment from the ground instead of a ramp,” Mr Slaughter said.

Keeping the rig on the ground rather than on a platform enhances safety by providing more stability, he said. Transportation costs associated with moving a ramp to the well site also can be reduced. Further, Mr Slaughter noted that 96-ft to 112-ft masts on more conventional rigs may have problems clearing taller wellhead control equipment.

Automated features include a hydraulic floor and operator control platform that can be operated from two positions – 1 ft to 15 ft, and 15 ft to 30 ft.  The floor allows the slips to be centered if the rig-up is slightly off to one side, eliminating the hazard of the slips catching on the floor while pulling pipe out of the hole, Mr Slaughter said.

Faster Trip Times

The rig has a 1 1/8-in. tubing line that provides line strength up to 276,000 lbs and allows blocks to be strung on six lines to reach maximum derrick and line rating, resulting in faster trip times. “If we need to go to 290,000 lbs, which is full derrick strength, we can put the blocks on eight strings,” Mr Slaughter said.

Another key design element is a safe mode air adjustor for reducing pressure on the air slips when entering or exiting the wellbore. “Historically, this has been a challenge because when there is too much pressure on the slips, rig operators have accidentally hit the slip control valve and dropped a joint or a stand of pipe in the hole,” he explained. “By reducing the air pressure, the slips won’t kick out, thus eliminating the hazard of dropping pipe in the hole.”

Mounted on a five-axle carrier, the rig maintains optimum highway weight and height tolerances, he said. “The rig is small enough to compete with other smaller rig designs for tight locations and shallow wells.”

Leave a Reply

*

FEATURED MICROSITES


Recent Drilling News

  • 16 April 2014

    Maersk Drilling takes delivery of ultra-deepwater drillship

    Maersk Drilling has taken the delivery of its second drillship, Maersk Valiant from the Samsung Heavy Industries (SHI) shipyard in Geoje-Si, South-Korea. Maersk Valiant has begun its voyage toward the...

  • 16 April 2014

    Ensco orders new jackups from Lamprell

    Ensco has ordered two high-specification jackups, ENSCO 140 and ENSCO 141, for delivery in mid-2016 from Lamprell’s shipyard in the United Arab Emirates. The rigs will also...

  • 16 April 2014

    MPD/UBD successfully drills sidetrack after 6 failed conventional drilling attempts

    In the Brookeland Field in East Texas, conventional drilling methods failed in six attempts to drill a “straightforward” horizontal wellbore. The original well had surface casing installed...

  • 16 April 2014

    Chevron’s DGD training program serves array of learners across generations

    Since 2008, more than 400 people – from operators, drilling contractors, service companies and regulators – have completed Chevron’s dual-gradient drilling (DGD) training...

  • 16 April 2014

    Pacific Drilling integrates ‘disruptive’ DGD technology into 7th-generation drillship

    A disruptive technology is one that “gets its start away from the mainstream of a market and, then, as its functionality improves over time, invades the main market,” as defined by Harvard...

  • Read more news