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<br /> <br />SCHEDULE 1 <br />DRILLING BOP SYSTEMS -CLASS II (ROTARY) <br />FOR WELLS WITH 1st CONTROL STRING <br />WITHOUT EXCEEDING A DEPTH OF 1800 m <br />MINIMUM PRESSURE RATING 14,OOOkPa <br />Pit <br />501 <br />out <br />NOTE: <br />1. Bleed off system shall be minimum nominal 75mm diameter throughout except for lines through <br />chokes and to mud systems which may be SOmm. <br />2. Flanged pipe connections from the drilling spool down to and including the connection to the <br />choke manifold, remainder of manifold may contain threaded fittings. <br />3. See page 1 of Schedule !for double gate preventen. <br />4. A second drilling spool moy be installed between the lower pipe ram and easing bowl, in which <br />ease a valve on the casing twwl is not required. <br />5. The fiat control string of casing shall be set and cemented prior to drilling into the target <br />zone. <br />.~ <br />Onn~ S <br />HYDRAULIC CONTROL SYSTEM <br />BLOWOUT PREVENTION STACK <br />MANIFOLD SYSTEM <br />