Would you like to start a free subscription?
Remember me | Forgot password
For full content view: Log in Now!
Liner drilling systems have been used for penetrating high pressured formations into deeper depleted zones.1 – 4 This article presents a method for using liner drilling to extend casing points in environments where pressure gradients are increasing with depth. The practice should be considered an alternative for reducing trouble time and reaching objectives in critical, narrow-margin wells.
The concept relies on managing annular fluid pressure around the large-diameter liner to create favorable equivalent circulating density (ECD) profiles that allow penetrating farther into narrow pore pressure-fracture gradient windows. However, as liner drilling proceeds beyond normal limits, risks must be managed for making drilling connections, liner cementing and maintaining well control. The approach is consistent with ongoing industry focus on managed-pressure drilling using conventional drillstrings.
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.
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:
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.
World Oil's specialized upstream Engineering Data Tables featuring the Drill Bit Classifier, Tubing Tables and more. Get Total Access today.
Aberdeen - December 2-3
Calgary - December 8-8
Mangaf - December 8-10
All material subject to strictly enforced copyright laws.
© 2014 World Oil. © 2014 Gulf Publishing Company.