发明名称 |
EXPANDER TOOL FOR USE IN A WELLBORE |
摘要 |
The present invention generally relates to apparatus and methods for expanding a tubular. In one embodiment, an expander tool includes a body having at least one recess therein. An expansion assembly disposable in the at least one recess includes a piston that outwardly extends from the body in response to a radially outward force. The expansion assembly includes one or more rollers disposed on a shaft such that the rollers rotate at different speeds. In order to improve a rolling ratio, the shaft is arranged on the piston at an outward angle relative to a longitudinal axis of the tool. The expansion assembly is disposed along the tool at a skew to provide tractoring and reduce slippage due to axial movement. A bearing adjacent the roller and rotationally secured to the roller reduces roller heating and wear. In another aspect, methods for expanding a tubular within a wellbore are provided.
|
申请公布号 |
CA2483812(C) |
申请公布日期 |
2008.09.02 |
申请号 |
CA20042483812 |
申请日期 |
2004.10.05 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
SCOTT, KEVIN;HILLIS, DAVID;PENDLETON, GARY;JOHNSTON, GARY;RUDD, WAYNE |
分类号 |
E21B43/10;E21B29/00 |
主分类号 |
E21B43/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|