Storm Choke® H safety valves are ambient-type, wireline retrievable valves that are normally closed and precharged with a set dome pressure. When the well flowing pressure drops below the predetermined dome-pressure charge, as a result of a rupture in the flowline or surface equipment, the dome pressure and valve spring are designed to close the valve, shutting in the well. The H valve is used in wells producing large volumes of abrasive fluids. Its large bore is not restricted by a flow bean. The valve is designed to resist pressure surges. A metal-to-metal (MTM) ball and seat is used as the primary closure mechanism. The H valve is ideal for protecting wells with declining bottomhole pressure because this valve is tubing pressure sensitive instead of velocity sensitive. To reopen, the valve pressure must be fully equalized either by applying pressure in the tubing from the surface or by running a prong to allow equalization from below. The valve will reopen when the tubing pressure acting on the internal piston area overcomes the dome charge. Applications » Wells producing large volumes of abrasive fluids » Wells with declining bottomhole pressure » Wells with no provisions for surface-controlled valves Features » Large bore not restricted by a flow bean » MTM ball and seat » Designed to resist pressure surges *description excerpted from manufacturers catalogue.

The FRN wireline-retrievable flapper valve, which is normally closed, is held open by hydraulic control pressure from the surface. The valve operates on a hydraulic-piston principle. To open, tubing pressure slightly higher than the well pressure below the closed flapper is applied. Once well pressure is equalized across the closed flapper, hydraulic pressure is applied to the piston, which pushes the flapper open. The flapper hinge assembly is designed so the force on the piston is not applied directly on the hinge pin. Upon loss of hydraulic pressure in the control line, the valve's large spring serves to lift the hydrostatic head of the control fluid. The flapper spring is designed to close the valve when the piston moves up past the flapper. Opening Prong Nose Seal The FRN valve uses the valve housing as the downstop for the opening prong. This metal-to-metal (MTM) interface is designed to prevent flow from passing between the valve housing and opening prong. The MTM interface isolates the flapper and seat from fluid flow while the valve is open. This design creates an MTM interface with the full force exerted by the hydraulic piston, minus the spring compression force, holding the two metal faces in contact. Radius of Curvature at Flow Entrance Halliburton conducted a study with various curvatures on the entrance to the valve. The study tested abrasive fluids flowing through different test subs and examined the resulting wear patterns. As a result, an optimum radius of curvature was determined and implemented on the valve housings of all wireline retrievable safety valves. Applications » New completions » Deep set » High pressure Features » High-strength rod-piston actuation » Non-equalizing flapper closure » Solid construction flapper made from bar stock » Spherical radius seat on flapper improves seal reliability » Sealing and seating surfaces are out of flow path of well production when valve is in open position » Designed for easy field servicing *information referenced from supplier catalog.

The T, T-CL, C-SRL-CL and CXS Tubing Hangers are all single completion, mandrel-type hangers for use in either the C Tubing Spool or the CD-2 Tubing Spool. T Tubing Hanger The T Tubing Hanger withstands stress of high pressure, corrosive/erosive elements associated with well flow. Its flexible neck maintains the metal seal despite thermal or pressure cycling. T-CL Tubing Hanger The T-CL Tubing Hanger withstands stress of high pressure, corrosive/erosive elements associated with well flow. A control line exit block is available in either a bull plug style or block needle valve style. C-SRL-CL Tubing Hanger The C-SRL-CL Tubing Hanger incorporates a pressure energized SRL neck seal which accommodates vertical movement in the tubing hanger during BOP testing. A control line exit block is available in either a bull plug style or block needle valve style. The C-SRL-CL hanger should be used in 7-1/16” 10,000 psi Type C Tubing Spools. CXS Tubing Hanger The CXS Tubing Hanger includes two neck seals which may be used to isolate one control line.