| 主权项 |
1. A remote controlled tilting power swivel assembly attached to a lifting means of a drilling rig for drilling a wellbore, the remote controlled tilting power swivel assembly comprising;
a. connecting means for engaging the lifting means; b. a power swivel having a power swivel housing, movably connected to the connecting means; c. a means of connecting the power swivel moveably to the connecting means; d. a tilt plate secured to the power swivel housing, the tilt plate comprising:
(i) a thru hole, configured to enable the means of connecting to penetrate through the tilt plate into the power swivel housing; and(ii) an adjustable stop mounted to the tilt plate, wherein the adjustable stop is adjustable to control positioning of the power swivel at a substantially vertical position; e. a tilt cylinder assembly connected to the connecting means on a side opposite the tilt plate, the tilt cylinder assembly comprising:
(i) a cylinder, wherein the cylinder comprises an adjustable extension;(ii) a cylinder attachment for connecting the cylinder to the connecting means;(iii) an extend port for communicating hydraulic fluid into the cylinder to extend the cylinder; and(iv) a retract port for communicating hydraulic fluid into the cylinder to retract the cylinder; f. a tilt valve in fluid communication with a hydraulic fluid source, wherein the tilt valve causes hydraulic fluid to enter the extend port, extending the cylinder, thereby tilting the power swivel away from the substantially vertical position until tilting of the power swivel up to a full extension of the cylinder; g. a retract valve mounted on the power swivel and connected to the hydraulic fluid source to the power swivel, wherein the retract valve flows hydraulic fluid into the retract port, retracting the cylinder, thereby retracting the power swivel toward the substantially vertical position; and h. a remote control for operating the tilt valve and the retract valve for controlling extending and retracting of the power swivel. |
