Abstract: A cable clamping device of the rotary jaw type is provided with means for adjusting its cable-receiving and cable-clamping capabilities. The adjustment means permits selective adjustment of the effective cable-receiving or cable-clamping dimension of the clamp. For example, the male member of the rotary jaw clamp is fitted with a rotatable sleeve which has an internal bore having a longitudinal axis angularly displaced from the axis of the sleeve. Rotation of the sleeve results in a change in the size of the cable-receiving and cable-clamping bore of the clamp.

Abstract: A bit packer for use with a string of dual concentric drill pipe, having inner and outer tubular members concentrically arranged to mate with the inner and outer pipes of the drill string to provide an annular conduit for fluid from surface to bit and a central conduit for fluid and cuttings from bit to surface, is particularly characterized by flexible packing means mounted slidably and rotatably on the outer tubular member. The packing means deform against the hole wall to seal the annular space between the outer member and the hole wall. Upper and lower ports provide fluid communication between the annular conduit and the annular space; when the packer is moved downwardly in the hole the packing means slides upwardly to close the upper port and open the lower port; when the packer is moved upwardly in the hole, the converse occurs. A milling collar is provided above the packing means.

Abstract: An improved rotary jaw clamping device is disclosed for use with cables, wires and the like which includes means disposed between the rotating jaws of the clamp to adjust the cable-receiving and cable-clamping capability of the clamp to enable its use with cables of varying diameters.