公开(公告)号：US09784088B2

公开(公告)日：2017-10-10

申请号：US15035449

申请日：2015-07-13

Applicant: Landmark Graphics Corporation

Inventor： Robello Samuel ,  Gabriela M Morales-Ocando ,  Aniket Aniket

IPC: E21B21/08 ,  E21B44/00 ,  E21B41/00

CPC classification number: E21B44/00 ,  E21B21/08 ,  E21B41/0092 ,  E21B2021/006

Abstract: Bottom-hole pressure operating envelops for underbalanced drilling take into account the lithologies of the formations being drilled through.

公开(公告)号：US20170167240A1

公开(公告)日：2017-06-15

申请号：US15035449

申请日：2015-07-13

Applicant: Landmark Graphics Corporation

Inventor： Robello Samuel ,  Gabriela M Morales-Ocando ,  Aniket Aniket

IPC: E21B44/00 ,  E21B41/00 ,  E21B21/08

CPC classification number: E21B44/00 ,  E21B21/08 ,  E21B41/0092 ,  E21B2021/006

Abstract: Bottom-hole pressure operating envelops for underbalanced drilling take into account the lithologies of the formations being drilled through.