Patent ID: 9103167
Filing Date: 2015-08-11
Classification: E21B

Abstract:
1. A rod-mounting apparatus for a drilling apparatus, comprising: a bracket disposed under a lid which is mounted on a main body of the drilling apparatus; a base member rotatably mounted on the bracket; a rotating member hinged to one side of the base member to hold an end of a rod which is connected to or separated from a driving shaft which is mounted on the lid and to rotate the rode; a clamping unit mounted on the rotating member to clamp the end of the rod; and an actuator installed on the base member to rotate the rotating member in a direction that the rod is being rotated between a vertical and horizontal position, wherein the clamping unit includes a fixed jaw fixed on a top surface of the rotating member, a movable jaw rotatably installed on the fixed jaw with a hinge shaft and forming a holding part, in which the end of the rod is inserted, along with the fixed jaw, and a driving cylinder connected between the rotating member and the movable jaw and rotating the movable jaw with respect to the fixed jaw and wherein a stroke span of the driving cylinder by which the movable jaw is rotated to be opened from the fixed jaw is restricted in a range that the rod is prevented from being dislodged from the holding part when the movable jaw is maximally opened from the fixed jaw, the movable and fixed jaws each comprising an elongated half-cylinder that axially extends beyond each side of a pair of axially spaced arms joining the fixed and movable jaws, thereby forming the hinge shaft.