公开(公告)号：US4273186A

公开(公告)日：1981-06-16

申请号：US960170

申请日：1978-11-13

申请人： Joseph L. Pearce ,  John H. Yonker ,  Thomas M. Deaton

发明人： Joseph L. Pearce ,  John H. Yonker ,  Thomas M. Deaton

IPC分类号： E21B34/00 ,  E21B34/10

CPC分类号： E21B34/106 ,  E21B2034/002

摘要： A well safety system comprising a tubing retrievable safety valve adaptable for being connected in a well tubing string with means therein, responsive to pressure, for opening and closing the valve. The tubing retrievable safety valve is to be connected, in the tubing string, below a landing nipple for receiving a secondary safety valve. The safety valve and landing nipple are connected by a common conduit for conducting a suitable pressure fluid for control and balance of the safety valve and a secondary valve landed in the landing nipple. Means are provided on the landing nipple for selectively flushing pressure fluid into the tubing bore. This abstract of the disclosure is neither intended to define the scope of the invention which, of course, is measured by the claims nor is it intended to limit the invention in any way.

摘要翻译： 一种井下安全系统，包括可回收的管道，适于在井管柱中与其中的装置连接，其响应于压力，用于打开和关闭阀。 管道可回收安全阀在油管柱中连接在用于接收辅助安全阀的着陆接头下方。 安全阀和着陆接头通过公共管道连接，用于传导合适的压力流体，用于控制和平衡安全阀和落在着陆接头中的次级阀。 装置设置在着陆接头上，用于选择性地将压力流体冲洗到管孔中。 本公开的摘要既不旨在限定本发明的范围，当然，该权利要求由权利要求来衡量，也不以任何方式限制本发明。

公开(公告)号：US4227573A

公开(公告)日：1980-10-14

申请号：US961139

申请日：1978-11-16

申请人： Joseph L. Pearce ,  Thomas W. Ray ,  Donald F. Taylor ,  John H. Yonker

发明人： Joseph L. Pearce ,  Thomas W. Ray ,  Donald F. Taylor ,  John H. Yonker

IPC分类号： E21B23/10 ,  E21B37/10 ,  F16J15/32 ,  E21B33/12

CPC分类号： E21B23/10 ,  E21B37/10 ,  F16J15/3284

摘要： A piston for use as a TFL locomotive or well swab having a seal unit forming a fluid seal between the piston and the inner wall of a flow conductor or tubing string. The seal unit comprising at least one annular fin or lip extending radially from the piston. The annular fin or lip having an exterior portion formed from elastomeric material which is deformable to seal with the flow conductor and an interior portion formed from elastomeric material molded on wire mesh. The interior portion providing increased wear resistance and strength for the annular lip. In one version, the piston carries several individual seal units each having an annular lip.

摘要翻译： 用作TFL机车或井眼用的活塞，其具有在活塞和流动导体或管柱的内壁之间形成流体密封的密封单元。 密封单元包括从活塞径向延伸的至少一个环形翅片或唇缘。 环形翅片或唇缘具有由弹性体材料形成的外部部分，其可变形以与流动导体密封，以及由在金属丝网上模制的弹性体材料形成的内部部分。 内部部分为环形唇缘提供增加的耐磨性和强度。 在一个版本中，活塞承载多个具有环形唇缘的单个密封单元。