发明名称 |
Subsurface release cementing plug |
摘要 |
A subsurface release plug release apparatus comprising a mandrel comprising a bottom plug portion, a top plug portion, a work string attachment portion, a first release portion between the bottom plug portion and the top plug portion, wherein the first release portion comprises a controlled strength segment configured to fail structurally and thereby release the bottom plug portion at a first fluid pressure, and a second release portion between the top plug portion and the work string attachment portion, wherein the second release portion is configured to release the bottom plug portion at a second fluid pressure, wherein the first fluid pressure is less than the second fluid pressure, a bottom plug body disposed about the bottom plug portion of the mandrel, and a top plug body disposed about the top plug portion of the mandrel. |
申请公布号 |
US8967255(B2) |
申请公布日期 |
2015.03.03 |
申请号 |
US201113289642 |
申请日期 |
2011.11.04 |
申请人 |
Halliburton Energy Services, Inc. |
发明人 |
Szarka David D.;Levie David E. Y. |
分类号 |
E21B33/14;E21B33/16 |
主分类号 |
E21B33/14 |
代理机构 |
Baker Botts L.L.P. |
代理人 |
Wustenberg John W.;Baker Botts L.L.P. |
主权项 |
1. A subsurface release plug release apparatus comprising:
a mandrel comprising:
a bottom plug portion;a top plug portion;a work string attachment portion;a first release portion between the bottom plug portion and the top plug portion, wherein the first release portion comprises a controlled strength segment configured to fail structurally and thereby release the bottom plug portion at a first fluid pressure; anda second release portion between the top plug portion and the work string attachment portion, wherein the second release portion is configured to release the bottom plug portion at a second fluid pressure, wherein the first fluid pressure is less than the second fluid pressure, wherein the mandrel is manufactured by a process comprising winding a plurality of fibers around a mandrel template; a bottom plug body disposed about the bottom plug portion of the mandrel; and a top plug body disposed about the top plug portion of the mandrel. |
地址 |
Houston TX US |