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This page displays all 「FI」 in main group E21B1/00. |
HB:Handbook | ||||
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CC:Concordance | |||||
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Percussion drilling[2006.01] | HB | CC | 2D129 | |
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.Surface drives for drop hammers, e.g. with a cable [1,7] | HB | CC | 2D129 | |
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..Devices for reversing the movement of the rod or cable at the surface | HB | CC | 2D129 | |
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.with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) [7] | HB | CC | 2D129 | |
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..driven by a rotating mechanism [7] | HB | CC | 2D129 | |
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...with spring-mounted reciprocating masses, e.g. with air cushion [7] | HB | CC | 2D129 | |
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....with elastic joining of the drive to the push-rod by double buffer springs [7] | HB | CC | 2D129 | |
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...formed as centrifugal hammers [7] | HB | CC | 2D129 | |
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..driven by electromagnets [7] | HB | CC | 2D129 | |
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..the impulse member being a piston driven directly by fluid pressure [7] | HB | CC | 2D129 | |
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...by liquid pressure [7] | HB | CC | 2D129 | |
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....working with pulses [7] | HB | CC | 2D129 | |
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...by air, steam or gas pressure [7] | HB | CC | 2D129 | |
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....working with pulses [7] | HB | CC | 2D129 | |
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.....the impulse member being a piston of an internal-combustion engine [7] | HB | CC | 2D129 | |
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.Tool-carrier piston type, i.e. in which the tool is connected to an impulse member [7] | HB | CC | 2D129 | |
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.Hammer piston type, i.e. in which the tool bit or anvil is hit by an impulse member [7] | HB | CC | 2D129 | |