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RU1788202C
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Toggle-type core catcher
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RU1786241C
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Device for shutting up wells
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RU1795098C
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Method for investigating deformation properties of rock mass and device for its realization
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RU1778367C
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Working members of multistart single-screw hydraulic machine
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SU1751292A1
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Core-lifter
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RU1779742C
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Coupling for stage cementing
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RU1788192C
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Device for drilling vertical wells
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SU1758219A2
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Method of shutoff of formation water influx
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RU1788209C
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Packer
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SU1745749A1
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Drilling mud
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RU1798432C
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Device for assessment of deformation and strength properties of rock mass
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SU1763470A1
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Composition for drilling fluid treatment
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RU1772346C
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Seam development method
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Hydraulic hammer
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Method and apparatus for studying deformation and strength properties of rock masses
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Rolling-cutter drilling bearing
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Mud pump piston
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RU1793079C
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Cone drill bit
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SU1767185A1
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Planetary drill
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SU1754922A1
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Part joint
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