Would you like to start a free subscription?
Remember me | Forgot password
For full content view: Log in Now!
In the conventional drilling circulation flow path, drilling fluid exits the top of the wellbore open to the atmosphere via a bell nipple, then through a flowline to mud-gas separation and solids control equipment, an open vessel approach. Drilling in an open vessel presents difficulties during operations that frustrate every drilling engineer. Annular pressure management is primarily controlled by mud density and mud pump flowrates. In the static condition, bottomhole pressure (PBH) is a function of the hydrostatic column’s pressure (PHyd). In the dynamic condition, when the mud pumps are circulating the hole, PBH is a function of PHyd and annular friction pressure (PAF), Fig. 1.
In an open-vessel environment, drilling operations are often subjected to kick-stuck-kick-stuck scenarios that significantly contribute to Non-Productive Time (NPT), an add-on expense for many drilling AFEs. In an open vessel, pressures cannot be adequately monitored unless the well is shut-in.
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.
New Delhi - January 11-14
Muscat - January 26-29
Bogota - January 28-29
All material subject to strictly enforced copyright laws.
© 2014 World Oil. © 2014 Gulf Publishing Company.