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S & B Engineers Patents |
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Assignee: S & B Engineers
Address: Houston, TX
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4576235 |
Downhole relief valve |
March 18, 1986 |
| A downhole relief valve connected to a tubing string in a producing well above the packer for controlling the well to prevent excess pressure built up in the annulus and casing damage following a tubing rupture at a point where the flowbore pressure exceeds the annulus pressure. The valv |
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