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Inventor: Anderson; David Z.
Address: Glenpool, OK
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7591317 |
Tubing pressure insensitive control system |
September 22, 2009 |
| A control system can be used with a single control line to a subsurface safety valve. The operating piston is exposed to the flow tube between two blocks with near identical seals to make the piston insensitive to tubing pressure. A control system seal is carried by the piston in the |
| 7552774 |
Control line hydrostatic minimally sensitive control system |
June 30, 2009 |
| A control system for a downhole tool, such as a subsurface safety valve, features an operating piston that is insensitive to tubing pressure in the valve. The hydrostatic forces from the single control line from the surface are significantly reduced with a branch line to a piston bottom |
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