公开(公告)号：US20140326511A1

公开(公告)日：2014-11-06

申请号：US14331692

申请日：2014-07-15

Applicant: CONOCOPHILLIPS COMPANY

Inventor： David H. BEARDMORE ,  Paul D. SCOTT ,  Rick D. WATTS

IPC: E21B21/00 ,  E21B33/138

CPC classification number: E21B21/003 ,  E21B17/1078 ,  E21B31/03 ,  E21B33/138

Abstract: This invention relates to drilling a well, particularly an oil or gas well, where casing or liner will be installed to stabilize the wellbore. The present invention is intended to permit more drilling and longer lengths of casing or liner to be installed at one time. The present invention includes a combination of a smear tool and specially sized granular lost circulation material solids in the drilling mud which work together to close and seal leaking formations and fractures whether pre-existing or induced by drilling. By the natural collection of the inventive solids along with the conventional particles in the drilling mud to form a filter cake at the problem areas along the wall of the wellbore and the smear tool arranged to compress the filter cake into the problem areas, lost circulation is minimized Maintaining circulation naturally allows for longer drilling cycles and potentially fewer liner joints in the well. As such, larger diameter boreholes are located in the hydrocarbon bearing formation and less time is spent installing casing or liner pipe.

Abstract translation: 本发明涉及钻井，特别是钻井或油井，其中将安装套管或衬套以稳定井筒。 本发明旨在允许一次安装更多的钻孔和更长的套管或衬套。 本发明包括在钻井泥浆中的涂抹工具和特殊尺寸的颗粒状流失物质固体的组合，它们一起工作以关闭和密封泄漏的结构和裂缝，无论是否已经存在或通过钻孔引起。 通过将本发明固体与钻井泥浆中的常规颗粒一起天然收集，以在沿着井眼的壁的问题区域形成滤饼，以及布置成将滤饼压缩到问题区域中的涂抹工具，失去循环是 最小化保持循环自然地允许井的更长的钻井循环和潜在的更少的衬管接头。 因此，较大直径的钻孔位于烃轴承地层中，较少的时间用于安装套管或衬管。