| Patent Number |
Title Of Patent |
Date Issued |
| 4081027 |
Shear rams for hydrogen sulfide service |
March 28, 1978 |
| Shear rams shearing drill pipe passing through with blowout preventers encountering hydrogen sulfide are disclosed. The ram bodies are formed of an alloy having an upper hardness level of about Rc22 and the shearing blade and drill string engaging surfaces of the rams are hardfaced with |
| 4072122 |
Mooring and release device |
February 7, 1978 |
| A hydro-pneumatic device secures and releases a mooring or towing hawser to a vessel. A carriage reciprocates on a frame on the vessel and moves a bollard between one position securing a hawser to the towing or moored vessel and another position releasing the hawser. Movement of the carr |
| 4043575 |
Riser connector |
August 23, 1977 |
| A connector for use between two riser pipes has a pin fitting at the end of one pipe. An end sleeve on the pin fitting has a cylindrical exterior surface and a first peripheral flange with upper and lower normal surfaces. A box fitting is at the end of the other pipe and has an end box |
| 4023593 |
Valve and control therefor |
May 17, 1977 |
| A hydraulic valve has a non-heating, low-power electric control. A main valve is movable in a main valve body to interconnect and isolate pressure, tank or drain and cylinder passages. Pressure to operate the main valve is controlled by pilot poppet valves having passages joined to t |
| 3973511 |
Bollard |
August 10, 1976 |
| A device for handling a line or rope includes a fixed base. A release lever is horizontally pivoted at one end to the base. An upright bollard drum is, in turn, horizontally pivoted at the bottom to the release lever for restricted movement toward and away from upstanding pads on the rel |
