4. E - Fixed Constructions
  5. 21
  6. B

Leon Van Den Steen

E - Fixed Constructions – 21 – B

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Inventor

Country: Netherlands

Device for controlling the weight on an earth drill bit

E - Fixed Constructions – 21 – B
Patent

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Drilling assembly with reduced stick-slip tendency

E - Fixed Constructions – 21 – B
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Hydraulic thruster for use in a drill string

E - Fixed Constructions – 21 – B
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Method of determining drill string stiffness

E - Fixed Constructions – 21 – B
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Profile ID: LFCA-PAI-P-1376806

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