Section R. 408.15707 - Definitions; SRule 5707.
(1) "Safety valve" means a valve available for quick installation in the pipe string to prevent flow.(2) "Shale shaker" means a vibrating sieve used to remove cuttings from the circulating fluid.(3) "Snubbing" means pulling or running pipe under pressure through a resilient sealing element where special equipment is used to apply external force to push the pipe into the well or to control the pipe movement out of the well.(4) "Special services" means those operations requiring specialized equipment and personnel to perform work processes to support well drilling and servicing operations.(5) "Stabbing a valve" means aligning and screwing a valve onto the end of a pipe.(6) "Stabbing board" means a temporary elevated platform erected in a derrick or mast.(7) "Stripping" means pulling or running pipe under pressure through a resilient sealing element and may also include the removing of rods and tubing from the well at the same time.(8) "Substructure" means a structure that surrounds the wellbore at the surface and provides the working area for certain employees. It may contain the rotary table.(9) "Swabbing" means the planned lifting of well fluids to the surface using a piston-like device installed on a wire line. Swabbing may inadvertently occur due to piston action as pipe or assemblies are pulled from the well.(10) "Swivel" means a device at the top of the drill stem that permits the circulation of fluids and the rotation of the drill string.Mich. Admin. Code R. 408.15707