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GB570842A
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Improvements in or relating to means for removing debris from bore holes or wells
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GB545271A
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Improvements relating to devices for clearing obstructions from wells or bore holes
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GB539139A
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Improvements in fluid pressure joints for pipes and other conduits, fittings and the like
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GB540625A
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Improvements in and relating to releasable pipe joints as used in well drilling
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GB538666A
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Improvements in and relating to releasable pipe joints as used in well drilling
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GB533752A
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Improvements in and relating to pipe cutters
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GB522824A
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Improvements in and relating to means for withdrawing casing from wells or bore holes
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GB383703A
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Improvements in and relating to rotary well-drilling apparatus
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GB356620A
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Improvements in or relating to well drilling apparatus
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GB304962A
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Improvements in or relating to well drilling machinery and the like
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GB304532A
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Improvements in or relating to well drilling apparatus
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GB307212A
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Improvements relating to drill-pipes for well boring
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GB293128A
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Improvements in or relating to wheels for vehicles
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GB264077A
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Improvements in joints for connecting drill or fishing tools to drill rods and the like
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GB245373A
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Improvements in percussion drill bits for drilling wells and the like
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GB248993A
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An improved coring and reaming tool for rotary well drilling
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GB246372A
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Improvements in fishing tools for use in connection with well drilling
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GB243625A
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Improvements in casing slips for well drilling apparatus
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GB246714A
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Improvements in or relating to means for raising and lowering well-casings, well boring tools and the like
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