Method for determining formation integrity and optimum...

Details Method for determining formation integrity and optimum... Method for determining formation integrity and optimum...

2011-07-26

2011-07-26

Wright, Giovanna C (Department: 3672)

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Measuring or indicating drilling fluid rate of flow

C175S025000, C175S038000

Reexamination Certificate

active

07984770

ABSTRACT:
A method for determining formation integrity during drilling of a wellbore includes determining an annulus fluid pressure in a wellbore during drilling thereof. The annulus pressure is adjusted by a predetermined amount. Flow rate of drilling fluid into the wellbore is compared to drilling fluid flow rate out of the wellbore. At least one of a formation pore pressure and a formation fracture pressure is determined from the annulus pressure when the compared flow rates differ by a selected amount. The method alternatively to determining pore and/or fracture pressure includes determining a response of the wellbore to the adjusted fluid pressure and determining the optimum annulus fluid pressure from the wellbore response.

REFERENCES:
patent: 6926801 (2005-08-01), Sweatman et al.
patent: 7044237 (2006-05-01), Leuchtenberg
patent: 7185719 (2007-03-01), van Riet
patent: 2003/0079912 (2003-05-01), Leuchtenberg
patent: 2007/0227774 (2007-10-01), Reitsma et al.
International Search Report and Written Opinion, International Application No. PCT/US2009/066422.

Affiliated with

Also associated with

Rating

Method for determining formation integrity and optimum... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for determining formation integrity and optimum..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining formation integrity and optimum... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2677394