发明名称 |
Fremgangsmåde til fjernelse af foringsrør i en underjordisk brønd |
摘要 |
A method is for removing casing from a well. The method includes setting a first sealing element into fluid-sealing engagement with the inside of the casing, lowering a flow-through string into the well, a cutting tool and a second, reversibly expandable sealing element being connected to the string, forming perforations into the casing by means of said cutting tool, expanding the second, expandable sealing element into fluid-sealing engagement with the inside of the casing, passing a pressurized fluid through the string and into the annulus via the perforations, so that the viscous and/or solid mass is displaced up the annulus, cutting the casing around its entire circumference; and pulling a length of the casing up from the well. |
申请公布号 |
DK2823133(T3) |
申请公布日期 |
2017.01.09 |
申请号 |
DK20130758073T |
申请日期 |
2013.03.04 |
申请人 |
Well Technology AS |
发明人 |
LARSEN, Arne, Gunnar;ANDERSEN, Patrick;JENSEN, Roy, Inge;DAHL, Arnt, Olav;MYHRE, Morten |
分类号 |
E21B29/00;E21B31/03;E21B31/16 |
主分类号 |
E21B29/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|