| 主权项 |
1. A rig adapted for making up and breaking out tubulars for insertion or withdrawal from a wellbore, the rig comprising:
a. a base, a mast on the base, a prime mover adjacent the mast, and a controller connected to the prime mover; b. a hoist mounted to the mast for lowering the tubulars into or from the wellbore; c. a power turning means on the mast for turning the tubulars into or out of the wellbore; d. a hydraulic power supply connected adjacent the mast for operating the power turning means and the hoist; and e. a tong assembly connected to the hydraulic power supply or a self-maintained and contained hydraulic power supply, and connected to the controller for making up and breaking out the tubulars being run into the wellbore, wherein the tong assembly comprises:
(i) a skid, a hinge connected to the skid, and a body connected to the hinge;(ii) a tong arm assembly for makeup and breakout, wherein the tong arm assembly is mounted to the body and configured to engage a tubular, and wherein the tong arm assembly arm comprises:
(a) an arm frame with a recess, gripping cylinder holes, and a makeup/breakout cylinder hole;(b) a floating jaw partially disposed within the recess and secured to the arm frame, wherein the floating jaw has at least one tong die slidably and removably attached to the floating jaw opposite the recess;(c) a gripping cylinder with a moveable rod extending therefrom, wherein the gripping cylinder is secured to the arm frame via a cylinder fastener and the gripping cylinder holes, and wherein the gripping cylinder nests adjacent to the arm frame and extends longitudinally along the arm frame;(d) a counter gripping member connected on one end to the moveable rod, wherein at least one opposite tong die is disposed on the counter gripping member opposite the at least one tong die of the floating jaw; and(e) a multi-function L-link assembly engaging the counter gripping member and the arm frame; and(iii) a hydraulic control assembly connected to the tong arm assembly, wherein the hydraulic control assembly comprises:
(a) a hydraulic inlet for receiving hydraulic fluid from a fluid source;(b) a hydraulic outlet for releasing the hydraulic fluid back to the fluid source; and(c) a makeup/breakout hydraulic cylinder connected to the arm frame and the body;(d) a spring bar connected to the multi-function L-link assembly;(e) a retaining spring connected between the spring bar and the multi-function L-link assembly;(f) a spring adjustment device for increasing or decreasing compression on the retaining spring;(g) a vertical lifting bar connected to the body for vertically lifting the tong assembly; and(h) a horizontal lifting bar connected to the body for horizontally lifting the tong assembly. |
