| 摘要 |
<p>A compressed fluid driven downhole cam motor (1) of the type used during drilling/service operations in the ground, comprising an intermediate casing (4), a distributing valve (26), a rotor (18) and two or more pistons (48) arranged radially and distributed with equal or unequal separation about the central axis of the rotor (18), whereby the pistons (48) located in the same radial plane constitute a set of pistons, and where two or more sets of pistons are arranged side by side along the longitudinal axis of the rotor (18).</p> |
