|
US3191697A
|
|
Subsurface earth formation treating tool
|
|
US3169579A
|
|
Axially spaced well packers
|
|
US2954827A
|
|
Method and apparatus for placing sealant in wells
|
|
US3012611A
|
|
Well treating tool
|
|
US2783809A
|
|
Differential screw thread construction
|
|
US2671514A
|
|
Well tool
|
|
US2739653A
|
|
Well tool and anchoring means therefor
|
|
US2796937A
|
|
Apparatus for sealing leaks in wells
|
|
GB652469A
|
|
Improvements in or relating to well tools
|
|
US2607425A
|
|
Well cementing tool
|
|
US2607424A
|
|
Well packer
|
|
US2575603A
|
|
Cementing tool
|
|
US2540967A
|
|
Well packer
|
|
US2290441A
|
|
Well cleaning device
|
|
US2156709A
|
|
Oil well device
|
|
US2159023A
|
|
Well cleaning device
|
|
CA527853A
|
|
Well tool
|
|
CA517619A
|
|
Well cementing tool
|
