发明名称 |
Apparatus And Method For Launching Plugs In Cementing Operations |
摘要 |
An apparatus for use in launching cement plugs in a well cementing operation, comprising: a cylinder (130); a piston (110) slideably received in the bore of the cylinder; and an actuator, operable by the piston, for launching a plug from the apparatus into the well; wherein the cylinder has a resiliently mounted latching member (132) positioned in the wall thereof and biased to project into the bore of the cylinder; and the piston has a profiled outer surface defining a recess (114) into which the latching member (132) can project to hold the piston in position in the cylinder. |
申请公布号 |
US2011290481(A1) |
申请公布日期 |
2011.12.01 |
申请号 |
US200913130852 |
申请日期 |
2009.11.24 |
申请人 |
RONDEAU JOEL;SALVAIRE ANDRE;SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
RONDEAU JOEL;SALVAIRE ANDRE |
分类号 |
E21B43/00;E21B23/00;E21B33/05 |
主分类号 |
E21B43/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|