Accumulator working pressure rating Minimum acceptable operating pressure Desired pre-charge pressure Maximum acceptable pre-charge pressure Minimum acceptable pre-charge pressure 1,500 psi 1,500 psi 750 psi 800 psi 700 psi 2,000 psi 2,000 psi 1,000 psi 1,100 psi 900 psi 3,000 psi 3,000 psi 1,000 psi 1,100 psi 900 psi Power for the closing unit pumps must be available to the unit at all times so that the pumps will automatically start when the closing valve manifold pressure has decreased to the pre-set level. Minimum standards for accumulator pump capacity. Each BOP closing unit must be equipped with a sufficient number and sizes of pumps so that, with the accumulator system isolated from service, the pumps will be capable of opening the hydraulically-operated gate valve (if equipped), plus closing the annular preventer on the smallest size drill pipe in use, and maintained a minimum of 200 psi above specified accumulator pre-charge pressure. See well control accumulator system for more details on pump sizing. Minimum standards and provisions for locking devices. A manual locking device (i.e., hand wheels) or automatic locking devices must be installed on all systems of 2M or greater. A valve should be installed in the closing line as close as possible to the annular preventer to act as a locking device. This valve must be maintained in the open position and closed only when the power source for the accumulator system is inoperative. Minimum standards provisions for remote controls. Remote controls shall be readily accessible to the driller. Remote controls for all 3M or greater systems shall be capable of closing all preventers. Remote controls for 5M or greater systems shall be capable of both opening and closing all preventers. Master controls must be at the accumulator and must be capable of opening and closing all preventers and the choke line valve (if so equipped). No remote control for a 2M system is required. A second remote control should be installed within or just beside the toolpusher office and should be function testes along with all other test Minimum standards and enforcement provisions for well control equipment testing. All tests described below should be perform using clear water or an appropriate clear liquid for subfreezing temperatures with a viscosity similar to water. Ram type preventers and associated equipment must be tested to approved stack working pressure if isolated by a test plug or to 80 percent of internal yield pressure of casing if BOP stack is not isolated from casing. I.E "test cup". Pressure should be maintained for at least 15 minutes or until requirements of test are met, whichever is longer. If a test plug is utilized, no bleed-off of pressure is acceptable. For a test not utilizing a test plug, if a decline in pressure of more than 10 percent in 30 minutes occurs, the test must be considered to have failed. The valves on casing head below test plug must be open during test of BOP stack. Annular type preventers must be tested to 60 percent of rated working pressure. Pressure Must be maintained at least 15 minutes or until provisions of test are met, whichever is longer. As a minimum, an test should be performed: A. When initially installed: B. Whenever any seal subject to test pressure is broken: C. Following related repairs: D. At 14-day intervals: E. Before any drill stem testing unless recently tested