Control Flow CF-2 is a straight-bore casing head that accepts any of two heavy duty interchangeable hangers. Each of these hangers (CF-1 and CF-2) can support weight beyond the joint strength of the pipe itself, with minimum casing deflection. Both can be lowered through blowout preventers. The CF2''s straight bore prevents test plugs from wedging when pressure is applied, reduces maintenance costs, avoids damage to sealing area by drill bits, and permits hanging more casing weight. These casing heads are usually furnished with two 2-inch outlets, but larger outlets plus studded or flanged, can be provided if desired. Bottoms of casing heads can be male, female, or slip-on type for welding. Top flanges are available in working pressures up to 10,000 psi. All casing head spools will accept bit guides and secondary seals if desired. When using bowl protector in CF-2 Casing Heads, we use two lock screws in upper flange (CF-2BP) or a hold down flange with lock screws can be furnished.
The CF-9 and CF-9L Head can be provided with an internal slip-on weld with inner "Seal" ring bottom.
The CF-2 Casing Hanger combines packoff, slip bowl, and slips into a single unit. The packoff automatically seals the casing annulus below the slips when casing load is applied, thus allowing annulus packoff before removing blowout preventer and cutting casing.
This wraparound hanger is easy to install. Simple construction and few parts make the CF-2 easy and economical to repair, and the individual tapered slip bowl reduces casing head repairs.
The CF-1 Casing Hanger consists of slips, slip bowl, and a floating seal ring (Type H packoff). Slips and slip bowl can easily be wrapped around the casing. The seal ring slips over the casing and into the casing head after casing has been suspended and cut off, providing a positive annulus packoff.
The double packoff flange provides an auxiliary casing seal and a means for pressure testing the casing seal and the primary annulus seal below the flange.
The double packoff flange also serves as an intermediate crossover flange when a restricted area ring gasket is used in the smaller diameter top groove. When a crossover is used, the top connection can be exposed to a higher pressure than the original rated working pressure.
The double packoff flange has two molded elastomer P seals which are energized by plastic packing. Pressure applied to the upper test port tests the P seals. Pressure applied to the lower test port tests the gasket and the primary casing seal.
A nominal 10" test plug and bowl protector running tool converted to run and retrieve a 12" nominal bowl protector. When run as a running and retrieving tool, the pin connection must be up.
A nominal 10" test plug converted with a sleeve bushing to test a 12" nominal bowl casing head. Test plug must be run with pin connection down.
The Control Flow, Type CF-T-16 Tubing Head is a full opening, threaded bore head. It's available with API top and bottom flanges, or with threaded or slip-on type bottom for welding. Outlets normally are two, 2 inch screwed or studded flanges, and large outlets or extended flanged outlets are available on request. All studded outlets have VR (Valve removal) threads to accept valve removal plugs. This feature allows you to replace full opening Valves under pressure.
All Control Flow, hangers for CF-T-16 can be installed through full opening blowout preventers.
The Control Flow, Type CF-T-16 Tubing provides lockdown screws sufficient to hold down all styles of tubing hangers and provides additional compression on the annulus packing flanged bottom available on CF-T-16.
Flanged bottoms available on CF-T-16, CF-00 Secondary Seals, CF-PE, CF-PR and Plain Bottoms. All flanges have test ports with ball checks for testing the secondary and primary seal of the casing head below. Standard bottom size for the CF-16 Packoff or CF-16-00 Reducer Bushing is used. This feature provides additional interchangeability and flexibility, permitting you to change the bit guide or bushing instead of the tubing head.
The WR-TC-1A is a threaded top and bottom mandrel-type hanger with an annulus seal energized by tubing weight and lockdown screws. The tubing is suspended directly from the hanger. For use in the WR-TC and WR-TCM Tubing Heads. Internal back pressure valve threads are available upon request.
The CF-TCD-2C is a straight bore hanger, which fits the TC tubing head and is easily aligned to suspend dual strings of tubing. This hanger contains two mandrel bushings, which are internally threaded to accept the WR back pressure valve. Both mandrels are suspended in a master bushing. The packing element is a sandwich-type packoff, easily lowered through the preventers and energized with the lock-down screws in the tubing head.
Simple to install through blowout preventers.
Packoff is integral part of hanger segment, eliminates extra procedure to install sandwich-type packoff. Annulus seal is achieved when hangers are installed and seal actuated by lockdown screws.
Tubing strings can be installed and removed independently, with maximum clearance for subsurface safety valves or gas lift valves.
Hangers are available with Control Flow, back pressure valve profile and are available with control line preparation for down hole surface controlled subsurface safety valves.
The CF-TC-1W is a split type, wraparound hanger, which can be easily assembled around the tubing and lowered through the preventers. The hanger has a compression type packoff, which is actuated by lock screws. The tubing must be suspended from a tubing head adapter or the CF-BO-2 Hanger Coupling.
The CF-1A-EN is a mandrel-type threaded hanger with back pressure valve threads and extended neck seals that provide a positive seal to isolate the flange and the ring gasket from well pressure and fluids. The bowl seal is effected by o-ring or compression type packoff. The CF-1A-EN accepts downhole control lines or injection tubing lines.
The CF-02 Tubing Spool Assembly is made up of a CF-02 Spool, CF-02 Tubing Hanger, CF-W Hanger, and a CFM or CFC Tubing Spool.
The CF-02 Tubing Hanger and Back Pressure Valve are installed on the last tubing joint and the CF-W Hanger is wrapped around the tubing below the CF-02 Hanger. This assembly is lowered through the blowout preventers until the CF-W lands in the tubing spool. The tubing spool tie-down screws are tightened to energize the CF-W Annulus Seal.
Once the CF-W Hanger is installed and the tie-down screws are tightened, the tubing string can be manipulated above and below the point of suspension, the blowout preventers can be removed, and the Christmas tree can be installed.
The CF-02 Spool or Christmas tree is screwed directly onto the CF-02 Hanger while the hanger and tubing string remain stationary.
Adapter seal flanges fit over Type CF Extended Neck Tubing Hangers to provide a secondary seal and a means of testing the lower connection.
CF-11 Bottom Hole Test Adapters are furnished in various sizes and working pressures to 15,000 psi. The CF-11 Adapters are for use in extreme pressure requirements.
The C-H Back Pressure Valve is a one-way check valve used to seal tubing pressure to 20,000 psi while the blowout preventers are removed and the Christmas trees is installed. It also permits fluid to be circulated down the tubing and prevents back flow.
The C-H Two-Way Check Valve is installed in the tubing hanger to allow the Christmas tree to be tested to 15,000 psi. The two-way check valve allows pressure to be equalized above and below the seal, ensuring safe removal from the tubing hanger.
The shallow threads on the C-H Back Pressure Valve and C-H Two-Way Check Valve provide strength, allowing the valves to withstand extremely high pressure without significantly reducing the tubing hanger bore size.
The control plug is a check valve, which allows a pressure gauge to be installed in the housing or spool outlet companion flange.
The check valve contains well pressure when the 1/2" pipe plug is removed.
The control plug is ported to eliminate the passage of well fluid around the threads when the pressure gauge taps the well pressure.
The valve removal plug allows the installation and removal of a valve under pressure by means of a lubricator.