PROTECTION OF CASING LOWSIDE WHILE MILLING CASING EXIT
摘要
<p>The lowside of a casing joint is protected from wear while milling a casing exit for a lateral borehole. The casing joint is coupled to a casing string and is made of a material that is softer than that of the casing string. A whipstock assembly is arranged within the casing joint and has a deflector surface operable to direct a drilling assembly into a sidewall of the casing joint to create the casing exit. A wear sleeve is coupled to and extends axially from the whipstock assembly, the wear sleeve defining a throat that extends axially along the axial length of the wear sleeve and transitions into the deflector surface. The axial length of the wear sleeve extends beyond a point of contact where the drilling assembly would otherwise engage the lowside of the casing joint.</p>
申请公布号
SG11201403843S(A)
申请公布日期
2014.08.28
申请号
SG11201403843S
申请日期
2012.02.24
申请人
HALLIBURTON ENERGY SERVICES, INC.;PARLIN, JOSEPH, DEWITT;DAHL, ESPEN