A water well drilling accessory, mountable on cable tool drilling machinery, in turn mounted on a vehicle, and when so mounted operated to drive water well casing pipe sections into the ground without interfering with the prior and continuing placement and operation of the drill bit and the overall drill string thereof, and thereby at times operating at the same time the water well drill is operating, comprising:
- a. a reciprocally guided hammer-head-ram integrally formed to provide:
- i. an axially aligned cylindrical chamber having a bottom entry to pass down over the top of the then uppermost water well casing pipe section and slidably continue on down to preferably surround at least a substantial length of the then guiding and aligning top portion of the exterior of this water well casing pipe section;
- ii. an axially aligned cylindrical chamber arranged concentrically above the axially aligned chamber that slides down the top portion of the uppermost water well casing pipe section, and having a bottom entry that will not pass over the top of the uppermost water well casing pipe section, but will allow the passing of the drill bit and the overall drill string thereof, other debris removing cylindrical units, and their respective supporting and operating cables;
- iii. an axially aligned impact transferring shoulder structure having a larger diameter matching the diameter of the axially aligned cylindrical chamber which receives the top portion of a water well casing pipe section, and a smaller diameter matching the diameter of the axially aligned cylindrical chamber which does not receive this top portion of the water well casing pipe section;
- iv. a top portion utilized during the securement of this reciprocally guided hammer-head-ram to a supporting and operating cable.