... across the tubing-retrievable safety valve (TRSV) to permanently hold open its flapper and serve as a sub-surface controlled safety valve. The notable advantages of a vessel based operation were the reduced personnel and reduced number of third-party service contractor interfaces to manage. The rig-up...

.... The SSSV is critical to the protection of the lives, assets, and the environment in the surrounding vicinity of the well completion. During normal operations or after a well-shut-in event occurs, pressure must be equalized across the SSSV closure device; typically, a flapper device to reopen the valve...

... of a comprehensive depiction of the new reservoir. Specifically, the system was designed to improve zonal isolation and flow barriers, minimize trips in hole and pipe manipulation, and eliminate well intervention. Enhancement of well control was considered paramount. buildup pressure flapper offshore...

... in the open position by application of hydraulic pressure at the surface, which is transmitted via a capillary to the SCSSV. In simplistic terms, the pressure places a force on a hydraulic piston, which moves downward, compresses a spring, and pushes a flapper (biased in closed position by a second spring...

... by the lower cost, ease, the simplicity and reliability of this development. Performance of the valve in cycle testing, sand slurry testing, flow erosion testing and temperature testing is discussed in summary Introduction The most common SCSSVS on the market today have flapper closures, and are biased...

... equipment that have been required by the need to support the new requirements of siimhoie monobore technology. The paper wiii present an overview of: . The evoiution of the fiapper design . The constraints various flapper designs piace on OD / ID ratios of the safety monobore completions. vaive for slimhole...

... at an extremely viscous 5 ppb (120#/Mgals). Typical pill volumes were 20 barrels and they were effective at reducing fluid loss to roughly 3 BPH. A second pill was only required on one well. Following the gravel pack, fluid loss was controlled mechanically by a ceramic flapper valve that closed when the washpipe...

... on the other downhole services resulting from the small hole size imposed an obstacle that was insurmountable with the technology available at that time. otc 7551 flowtube requirement completion installation and operations monobore completion nipple profile flapper monobore well completion...

... ABSTRACT A curved flapper configuration in surface-controlled subsurface safety valves provides either a larger bore for well production or a smaller valve outside diameter. However, this configuration often relies heavily on resilient or elastomeric seals to achieve acceptable sealing...

... loss upstream oil & gas safety valve trsv drillstem/well testing otc 7013 closure test objective testing shallow high-rate gas well downhole shut-in new technique flapper ~\lOIJi W OTC 7013 A New Technique for Testing Shallow High-Rate Gas Wells Using a Deep-Set Surface-Controlled...

...OTC 6756 Curved Flapper Safety Valves Reduce Flow Area Restrictions W.S.Going, Cameo Products & Services Copyright 1991, Offshore Technology Conference This paper wee presented at the 23rd Annual OTC In Houston, Texas, May 6-9, 1SS1. by 300/0 This paper wae seleoted for presentation by the OTC...

... valve production enhancement labyrinth seal gap belleville spring seal area solution-variable labyrinth seal upstream oil & gas flapper labyrinth seal downhole intervention reservoir surveillance nitrogen poppet valve seal housing completion installation and operations erosion...