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US3870063A
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Means of transporting crude oil through a pipeline
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Marine foundation structure
|
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US3021680A
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Submergible drilling barge with hull protective devices
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US2895300A
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Method and apparatus for stabilizing submersible vessels
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Liquid level rate of change indicating device
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US2651198A
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Weight on bit indicator
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US2612759A
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Submergible drilling barge
|
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US2699042A
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Portable marine foundation for drilling rigs and method of operation
|
|
US2551375A
|
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Submergible drilling barge and method of operation
|
|
US2540878A
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Submergible drilling rig foundation and method of constructing same
|
|
US2583841A
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Apparatus for measuring rotary well strings and well depths
|
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US2528955A
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Radio-activity logging of wells
|
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US2528956A
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Detection of washouts in rotary drilling strings
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US2528883A
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Weight on bit indicator
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US2528882A
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Method of logging wells
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Apparatus for logging wells in terms of drilling rates
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US2362750A
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Pumping apparatus
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US2372576A
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Method of determining formation porosity during drilling
|
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US2395407A
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Mechanism for measuring the movements of drilling tools and pipe
|
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US2390252A
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Apparatus for determining permeabilities of porous media
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