What is the largest drilling rig in North America?

by Patty Sullivan and Jill Rutherford

This month, a new extended reach drilling (ERD) rig with breakthrough capabilities is beginning its 2,400-mile journey from Nisku, Alberta, Canada to a drilling pad on Alaska&#;s North Slope. Called Doyon 26, the 9.5-million-pound rig &#; equivalent to almost 10 fully loaded Boeing 747s &#; will be hauled to Deadhorse, Alaska in pieces. The last of its 267 separate tractor-trailer loads will arrive by November .

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&#;We will take the rig apart in Canada and transport it via trucks to Alaska, running up the Alaska Highway and then up the Dalton Highway. When all the pieces arrive, we&#;ll put it back together like a big Lego to make seven rig modules,&#; said Paul McGrath, ERD project director. The modules will cross the resupply roads to Alpine in the first quarter of , he said. The anticipated &#;first drill&#; date for the new rig is April .

ERD Project Director Paul McGrath   

SMALLER FOOTPRINT

The ERD rig is expected to increase oil production by accessing previously unreachable resources without expanding the surface footprint. Doyon 26 will enable the development of Fiord West, a field discovered in , located northwest of the main Alpine field.

&#;ConocoPhillips Alaska has worked on the rig about four years, from initial FEED (front end engineering design) studies and concept stage. During construction we had assistance from our colleagues in Canada. The team recognizes what a game changer this will be for ConocoPhillips Alaska,&#; McGrath said.

LONGER REACH, SELF-PROPELLED

The development rigs working for ConocoPhillips on the North Slope today do not have the capability to access Fiord West without a newly constructed gravel pad, additional pipelines and more roads. Doyon 26 does. Extended reach technology enables the more powerful rig to drill targets seven miles from the surface location. Existing rigs are designed to drill about 22,000 feet from the pad, while the highly specialized Doyon 26 will be able to reach 37,000 feet. That means from a 14-acre drilling pad the high-tech rig will be able to develop 154 square miles of reservoir versus today&#;s 55 square miles. 

Alaska Drilling Manager Chip Alvord

Doyon 26 is the largest mobile land rig in North America and some 1.5 to 2 times as powerful as existing rigs.

&#;Even though it&#;s bigger, it&#;s more agile and more effective at fitting into tight well spacing,&#; McGrath said. &#;Special stomper feet will allow us to very accurately walk the rig modules in around tight tolerance areas.&#;

A development rig often needs to be moved hundreds of miles in a single winter, so mobility is another key factor. &#;We asked the manufacturer to make this large rig as mobile as typical North Slope rigs,&#; said Chip Alvord, Alaska drilling manager. &#;That&#;s quite a challenge given the size of the rig, but Doyon&#;s design met that challenge.&#; The rig moves as fast as the other rigs, and it&#;s also self-propelled. &#;The rig&#;s mobility will allow it to get online and drill a well more quickly,&#; Alvord said.

During their April visit, a team from ConocoPhillips Alaska tours the drilling rig floor.

WHY ASSEMBLE A DRILLING RIG FOR ALASKA IN ALBERTA

ConocoPhillips Alaska signed the contract with Doyon Drilling in October , continuing a 30-year working relationship with Doyon, an Alaska Native regional corporation.

&#;There are no facilities for constructing drilling rigs in Alaska, so most Arctic rigs are built in Washington state or in the Edmonton area,&#; McGrath said. Doyon subcontracted with NOV, a company recognized as the foremost designer and fabricator of arctic drilling rigs.

&#;From size to scale to scope, Doyon and NOV were the obvious choice to build this new rig, with the necessary facilities and expertise for the project,&#; McGrath said. 

 Canada Drilling Superintendent Dwaine Ringguth

TWO BUSINESS UNITS AS PARTNERS

For two years, on two-week rotations, two rig supervisors from ConocoPhillips Alaska joined the team in Canada, led by Peter Meier, manager, Drilling & Completions. From Alaska, Matt Shotenski, ERD project analyst, and Mike Winfree, staff drilling engineer, joined the team.

Throughout the construction of the rig, the business units learned from each other. &#;One area we have shared knowledge on is rig automation. The business units are using similar systems and see the benefits of continuing to collaborate on this exciting area of digital transformation,&#; said McGrath. 

Dwaine Ringguth, drilling superintendent for ConocoPhillips Canada, appreciates the new technology. &#;The rig is three years younger than what we have at Montney, and that three years of technology can make a big difference,&#; he said.

 Alaska President Joe Marushack speaks during his April visit to the Doyan rig construction site in Canada. Alaska Drilling & Wells Manager Shon Robinson

&#;Each business unit does things a bit differently, but being able to look over the fence at what your neighbor is doing and take what learnings you can to make your own business unit successful, that&#;s one of the benefits of joining forces on a project such as this. We don&#;t have to repeat each other&#;s mistakes,&#; Ringguth said.

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On April 23, Shon Robinson, manager, Drilling & Wells Alaska, and Peter Meier joined ConocoPhillips Alaska President Joe Marushack and representatives of ConocoPhillips, Doyon, and NOV in Nisku for a tour of what is one of the world&#;s largest mobile land drilling rigs.

&#;The size is impressive,&#; said Robinson. &#;But more impressive are the technology steps and capability that will come with the rig. It will serve ConocoPhillips well for the next decade and beyond.&#;

During their April visit, a team from ConocoPhillips Alaska tours the drilling rig floor.

ConocoPhillips says that the largest mobile land rig in North America is on its way from a National Oilwell Varco fabrication shop in Nisku to Alaska&#;s North Slope, where it will unlock previously unreachable oil resources. 

The extended reach drilling system, called Doyon 26, is estimated to be 1.5 to 2 times as powerful as existing rigs; a &#;game-changer&#; for ConocoPhillips Alaska, the company said on its Spirit Now web publication in July.

The rig has been in development since with Doyon Drilling Inc. (DDI), an Alaska Native regional corporation that ConocoPhillips says it has had a relationship with for 30 years.

Anchorage-based DDI says it &#;proudly supports a number of &#;firsts&#; in the industry,&#; including the first self-propelled, wheel-mounted rig developed for the North Slope.

Doyon 26 is also self-propelled, which is quite a challenge given the size of the rig, ConocoPhillips Alaska drilling manager Chip Alvord said on Spirit Now.

The kit also has &#;special stomper feet&#; that will allow the company to &#;very accurately walk the rig modules in around tight tolerance areas,&#; said Paul McGrath, ERD project director.

ConocoPhillips says the more powerful rig has capability to drill targets seven miles from the surface location.

&#;Existing rigs are designed to drill about 22,000 feet from the pad, while the highly specialized Doyon 26 will be able to reach 37,000 feet. That means from a 14-acre drilling pad the high-tech rig will be able to develop 154 square miles of reservoir versus today&#;s 55 square miles.&#;

ConocoPhillips says there are no facilities for constructing drilling rigs in Alaska, so most Arctic rigs are built in Washington state or the Edmonton area.

&#;During construction we had assistance from our colleagues in Canada. The team recognizes what a game changer this will be for ConocoPhillips Alaska,&#; McGarth said.

The company says the 9.5-million-pound rig &#; equivalent to almost 10 fully loaded Boeing 747s &#; is being hauled to Deadhorse, Alaska in 267 separate tractor-trailer loads, the last of which are expected to arrive by November .

After that, the pieces will be assembled into seven rig modules that will be transported over resupply roads to Alpine, Alaska in the first quarter of .

The anticipated first drill date for Doyon 26 is April .

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