MOBILE HYDRAULIC WORKOVER RIG
First Claim
1. In a workover rig having a base support and a derrick mounted on said base support including means for running pipe sections into and out of a completed well, the improvement comprising:
- a pair of elongated ground rails flanking at least one wellhead;
support means between said base support and said rails for slidable advancement of said derrick and said base support into alignment with each said wellhead; and
means for advancing said derrick and said base support along said rails.
2 Assignments
0 Petitions
Accused Products
Abstract
A portable hydraulic rig for workover, drilling or other operations on existing wells in which the rig has a derrick elevated on a base structure comprised of containers for equipment used in association with drilling or workover activities, a work platform including pipe rack sections for storing a plurality of pipes, the derrick being open-sided with a power cylinder at its upper end for lifting and lowering pipe sections away from and into each well, and hydraulic drive cylinders for advancing the rig between wells without telescoping or pivoting the derrick into a travel position, all of the hydraulic components being controlled from a central control panel on the work platform.
-
Citations
21 Claims
-
1. In a workover rig having a base support and a derrick mounted on said base support including means for running pipe sections into and out of a completed well, the improvement comprising:
-
a pair of elongated ground rails flanking at least one wellhead; support means between said base support and said rails for slidable advancement of said derrick and said base support into alignment with each said wellhead; and means for advancing said derrick and said base support along said rails. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
- 11. In a rig for oil and gas wells, a mobile derrick mounted on a base structure for advancement between said wells, said derrick having an open side along its substantial length of generally U-shaped cross-sectional configuration, a double-acting cylinder mounted at an upper end of said derrick for downward extension of a piston along said open side, and means for connecting each of said pipe sections in end-to-end relation to one another for upward and downward extension from a lower end of said piston in lifting and lowering a string of said pipe sections into and out of each of said wells.
-
17. A portable hydraulic rid for servicing, workover, completion and drilling and other operations on a plurality of wells comprising in combination:
-
a derrick comprised of a plurality of open-sided metal frame sections rigidly connected together in end-to-end relation to one another; a double-acting hydraulic cylinder at an upper end of said derrick; and a base structure for said derrick including hydraulic drive means for advancing said derrick into alignment with each of said wells. - View Dependent Claims (18)
-
-
19. The method of running pipe sections into and out of a succession of completed wells in closely spaced relation to one another comprising the steps of:
-
(a) rigidly mounting a derrick in upstanding relation to a slidable base structure; (b) advancing said derrick and base structure into position over each of said wells in succession; (c) side-loading each of a plurality of pipe sections onto said derrick in vertically aligned relation to each said well and fastening said sections together in end-to end relation to one another for advancement into each said well to a predetermined depth for servicing and treatment of each said well; and (d) followed by raising said assembled pipe sections from each said well and disassembling same for return to said platform and repeating steps (b) through (d) above. - View Dependent Claims (20, 21)
-
Specification