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Description:
-The Stinger Casing Saver is designed for high-pressure injection of all treating fluids, nitrified acids, and extremely lowpressure CO2 mixtures with high proppant concentrations and flow rates.
Specifications:
-Pressure Rating: 103.5 MPa (15,000 psi) working pressure
-Size specifications (sour and non-sour):
114mm (4 ½ in.) Mandrel ID 57.15mm (2.25 in.) max rate 10m3/min.(62 bbls/min)
139.7mm (5 ½ in.) Mandrel ID up to 57.15mm (2.25 in.) max rate up to 10m3/min 62 bbls/min)
177 mm (7 in.) Mandrel ID up to 57.15mm (2.25 in). max rate up to 10 m3/min (62 bbls/min)
244 mm (9 5/8 in.) Mandrel ID up to 57.15mm (2.25 in.) max rate up to10 m3/min 148 bbls/min)
Stinger can also accommodate high rate fracturing with our big bore casing savers that have a mandrel ID up to 95.25
mm (3.75 in.) with flow rates up to 24m3/min (148 bbls/min) for casing sizes over 139.7 mm (5 ½ in) by special request.
Please refer to our specialty tool section for more information.
Features:
1. Completely isolates the BOPs, valves and casing spool from the stimulation pressure, fluid and proppant
2. Installs securely either by flanged connection on top of the BOPs, by 180mm (7 1/16 in.) valve or by threaded
connection** with premium Grayloc connectors.
3. Safely injects and removes the mandrel and sealing assembly under wellhead pressure by hydraulic means.
4. Reduces friction pressure by eliminating tubing and packer.
5. Double master valves with full sour trim and a remote valve control.
6. Average installation and removal time of 45 minutes each.
7. Capable of flowback off the flowblock located between the hydraulic and manually controlled valves. Stinger trucks
carry 103.5 MPa (15,000 psi) chokes for flowback.
8. Reduces wear on tubular via bullnose nozzle assembly.
9. Utilizes accurate measurement procedure to determine precise landing position of the sealing assembly
10. Three-port and five port connections are available for high rate flow jobs on request.
*See threaded wellhead memo
Valves:
Stinger casing savers are equipped with split gate valves. The top valve is operated hydraulically by remote control with
an accumulator system, which allows operation even without the truck mounted hydraulic system running. The Stinger
designed valve control is safety protected against closing should the hydraulics be rendered inoperable. The bottom
valve is operated manually.
Power System
The Casing Saver mandrel is moved in and out of the well bore by means of hydraulic rams which are capable of
overcoming up to 42 MPa (6000 psi) well pressure.
Mandrel and Sealing Nipple System:
Stinger mandrels are fabricated from high-strength steels and are extremely resistant to erosion and corrosion from the
fluids and abrasives that flow them. Extensions with stroke lengths of up to 135 inches are available. The Stinger nipple
polyurethane seal compounds are compatible with all types of well servicing fluids.

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