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US2600761A
|
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Offshore drilling means
|
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US2058688A
|
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Apparatus for plugging back or bridging wells
|
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US2004606A
|
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Process of cementing wells
|
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US2029369A
|
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Monolithic cementitious pipe
|
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US1992424A
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Method of regulating flow from wells and apparatus therefor
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US2005367A
|
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Grouting plug
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US1541352A
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Method of and apparatus for mixing materials
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US1500385A
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Method of and apparatus for mixing materials
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US1703234A
|
|
Method and apparatus for drilling wells, such as oil wells
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|
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Method and means for cementing oil-wells
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CA251095A
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Method of hydrating cement, etc.
|
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CA261256A
|
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Well drilling machinery
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