| MOHAWK ENERGY LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100052319 | Dual Seal Expandable Tubular Connection - The present invention provides an expandable tubular connection that may be expanded to large degrees of expansion (i.e., 15-25%) in highly constrained conditions, such as Fix-Fix conditions, by hydraulic means and produces a metal-to-metal seal after expansion. The expandable tubular connection incorporates a combination of elastomeric and metal-to-metal sealing components in the sealing system. The elastomeric sealing component provides sealing of the connection during hydraulic expansion and allows control of deformation rates of pin and box members to achieve a high stress interference contact between pin and box members resulting in a metal-to-metal seal after expansion. | 03-04-2010 |
| 20090255592 | Reverse Action Flow Activated Shut-Off Valve - A flow activated valve includes an outer body and a piston disposed in an inner cavity of the outer body. The flow activated valve also includes one or more fluid passage exits in the outer body and one or more piston fluid passages in the piston. The one or more fluid passage exits and the one or more piston fluid passages allow fluid flow out of the valve. The flow activated valve also includes a flow restriction member disposed in a piston inner cavity. In addition, the flow activated valve includes a shear member disposed in the outer body, and a bias member disposed in an inner cavity of the outer body. The flow activated valve further includes a position control member disposed in the piston and a sealing member. | 10-15-2009 |
| 20090229835 | Method and Apparatus for Downhole Tubular Expansion - A method and apparatus for expanding tubulars are disclosed. In one embodiment, an apparatus for radially expanding a tubular in a wellbore is disclosed. The apparatus includes an expansion swage. In addition, the apparatus includes at least one anchoring device for selective and releasable anchoring of selected parts of the apparatus to an inner surface of the tubular. The apparatus also includes a thruster providing a force for longitudinal movement of the expansion swage inside the tubular. Moreover, the apparatus includes a hydraulic valve for selective control of a flow of operating fluid to the thruster. The hydraulic valve includes a valve cylinder slidably positioned on a shaft and a position control device for selective and releasable securing a position of the valve cylinder on the shaft. The hydraulic valve also includes an elastic device for shifting the valve cylinder between two end positions. | 09-17-2009 |
