| 发明名称 |
DOWNHOLE HOLE CLEANING JOINTS AND METHOD OF USING SAME |
| 摘要 |
A hole cleaning joint for a drill string is deployed into a wellbore penetrating a subterranean formation. The hole cleaning joint includes a tubular body connectable to the drill string and a hole cleaning section positionable about the tubular body. The hole cleaning section has an outer surface engageable with a wall of the well bore. The outer surface has spiral grooves extending therein defining blades therebetween, and an uphole end and a downhole end with a spiral cavity therebetween. The spiral cavity has a width that decreases towards the uphole end of the spiral cavity to define a tapered flow channel to receive cuttings therethrough whereby uphole movement of cuttings is facilitated during drilling. |
| 申请公布号 |
US2016237764(A1) |
申请公布日期 |
2016.08.18 |
| 申请号 |
US201415031670 |
申请日期 |
2014.10.22 |
| 申请人 |
NATIONAL OILWELL VARCO, L.P. |
发明人 |
Jellison Michael Joseph;Plessis Guillaume;Muradov Andrei;Price John Forester;Hain Stephen C. |
| 分类号 |
E21B17/22;E21B37/02;E21B17/042 |
主分类号 |
E21B17/22 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A hole cleaning joint for a drill string deployable into a wellbore penetrating a subterranean formation, comprising:
a tubular body connectable to the drill string; and a hole cleaning section positionable about the tubular body, the hole cleaning section having an outer surface engageable with a wall of the wellbore, the outer surface having spiral grooves extending therein defining blades therebetween, the spiral grooves having an uphole end and a downhole end with a spiral cavity therebetween; wherein at least a portion of the spiral cavity has a width that decreases towards the uphole end of the spiral cavity to define a tapered flow channel to receive cuttings therethrough whereby uphole movement of cuttings is facilitated during drilling. |
| 地址 |
Houston TX US |
