Press Esc to close

WorldOil

CONTENT PREVIEW

For full content view: Log in Now!

  • Petroleum Technology Digest: Reverse circulation drilling avoids damage to low pressure gas reservoirs


    P. Mackay

    PressSol Ltd. of Calgary has adapted reverse-circulation, center-discharge drilling (RCCD) for oil and gas drilling. Because RCCD drilling returns cuttings through the ID of the inner portion of double-wall drill pipe, it does not expose the formation to possible damage from drilling fluid and, thus, is particularly well suited for drilling low-pressure reservoirs. K2 Energy of Calgary has applied RCCD to successfully drill and test gas wells in the low-pressure (formation pressure estimated at 150 psi) Bow Island formation on the Blackfeet Indian Reservation in northern Montana, US. As of February 1, 2003, the system has been used to drill 11 Bow Island wells on the reservation and an additional five wells in the Thrust Belt. Drilling cost is competitive with mud or air drilling in that area; $15/ft for surface string to 600 ft and $10/ft for a long string to 2,500 ft. The system can be adapted to any rig with the addition of a dual-wall drillstring.

This area of the site is restricted. In order to gain access, please either Log In, or subscribe to World Oil.

Two options are available to you for creating an account.

1. Get a Free Trial Subscription to World Oil Magazine and gain immediate access to select content on World Oil Online.

Start a Free Trial Subscription and gain immediate access to the complete current issue of World Oil Magazine. Plus, you’ll receive 3 upcoming issues of World Oil Magazine in print or digital format.* You also receive access to the Energy Events Calendar, Industry Statistics and WO Wire’s news and industry coverage.

Free Trial


2. Purchase a subscription to World Oil magazine and gain immediate and complete access to World Oil Online. As a Total Access subscriber you will have access to all areas of the site available to registered users and free subscribers as well as having access to such premium content areas as:

  • The Archives section containing over ten years of complete magazine archives,
  • The WO DataHub's engineering tables and directories,
  • The World Oil annual forecasts, including past predictions,
  • Select World Oil technical handbooks,
  • And much, much more!

Subscribe


Physical copies of this content may be available for purchase. Visit the Reprints & Back Issues section.


If you are already a paid subscriber and do not have access, please email CustomerService@worldoil.com.

WO DATA HUB

EngineeringTablesIcon-Large

Engineering Data Tables

World Oil's specialized upstream Engineering Data Tables featuring the Drill Bit Classifier, Tubing Tables and more. Get Total Access today.

WO SUPPLEMENTS

2013 Fracturing Technology

2013 Fracturing Technology

ENERGY EVENTS