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Surface Control Equipment

This an illustration of the Surface Control Equipment layout. The configuration from the drill pipe safety valve up through the test head, through the steel flow lines to the floor manifold up to the rigs flare line, is the standard layout for the Surface Equipment.

All of BJs DSTs surface equipment is pressure tested regularly at the shop to 6,000 PSI. We suggest the running of a drill pipe safety valve in the test string, most drilling contractors have the safety valve on the rig floor, and if not BJs DST has the valve available. The rotational test head is made to hold a drop bar, held in place with a pin, the bar is there in case reverse circulation is necessary without the removal of the head from the drill pipe. The valve on the head is in place for various reasons, mainly as a backup should something unforeseen happen or shut the valve so you can pull up to the drill pipe safety valve. It also can be used to keep the test string shut in while rigging up the rest of the surface equipment. The steel flow lines come in 12 lengths, connecting together with hammer unions, they connect the test head to the floor manifold. The Floor Manifold has four valves to route pressure and fluid along with interchangeable bean chokes (8/64 to 64/64) to handle any situation. The manifold has two places made to receive a needle valve and pressure gauge, samples and pressures are taken here during the DST. The manifold is also used during reverse circulation as a place to catch fluid samples, gas samples and route the recovery through a choke (if necessary) to the test line on location. All of the surface equipment is rigged up to the test string prior to opening the test tool down hole.

From the manifold the gas and/or fluid are directed to the test line, which has been rigged up on location prior to test point. A simple test line consists of 2 pipe routed from the rig floor, along with a series of valves, to a flare pit, test tank and reserve pit. Some operators also rig up a separator in the test line to handle high volumes of gas and oil. When testing on federal lands, a flare igniter at the flare pit and a separator in the test line are required. The separator proves very useful when high gas and oil volumes are encountered.


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Copyright 2006 BJ's Drill Stem Testing
Last modified: 08/13/06
Original text written by Paul Myers