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MULTI-OPENING
CIRCULATING SUB
The Multi-Opening Circulating Sub is
designed to replace a conventional drop
ball circulating sub to allow additional cir-
culating capability above the tool string.
The Multi-Opening Circulating Sub is
flow activated and can be cycled as
many times as required without pulling
the BHA.
Assembly
Torsional
Tensile
O.D.
Yield
Strength
2 1/4”
2800 lb-ft
110,000 lbs
2 7/8”
3000 lb-ft
203,500 lbs
3 1/8”
3500 lb-ft
203,500 lbs
Specifications subject to change without notice
1 11/16”
7”
7/16”
1 3/4”
7”
7/16”
2 1/8”
7”
9/16”
2 1/4”
7”
9/16”
2 7/8”
7”
11/16”
3 1/8”
7”
11/16”
Specifications subject to change without notice
Make-up
Full Bore
O.D.
Length
I.D.
1.2501”
0.250”
0.406”
1.500”
10.250”
0.406”
1.687”
12.900”
0.687”
1.750”
12.900”
0.687”
2.000”
13.900”
0.687”
2.125”
13.900”
1.125”
2.250”
13.900”
1.125”
2.375”
13.900”
1.125”
3.125”
17.125”
1.312”
FLAPPER CHECK VALVE
The CT Flapper Check Valve is a safety
component used within a coiled tubing
string. It provides one way flow to allow
fluids, N2, or CO2 to be pumped through
the coiled tubing while preventing well
fluids from flowing back up the tubing
string. A drop ball can pass through the
Flapper Check Valve to operate tools
below the valve. Dual flapper redundancy
ensures a positive seal for safety. The
Flapper Check Valve cartridges within the
tool are available in two types of set/seal-
ing arrangements depending on customer
preference. Cartridges are available in a
low pressure Teflon seal and high
pressure metal-to-metal seal or a low
pressure o-ring seal and high pressure
metal-to-metal seal.
Flapper
Check Valve
DUAL CIRCULATION SUB
The Dual Circulation Sub is designed to
allow additional circulation capabilities
above the tool string by two activation
methods. The tool incorporates drop ball
activated circulating ports and a burst disc.
The pressure at which the tool will open by
the drop ball method can be easily adjusted
at surface by varying the number of shear
pins used. In the event that circulation is
lost, pressure can be applied to the tubing
to burst the disc allowing a drop ball to be
pumped to the circulating sub or discon-
nect. Burst discs are available in 4,000,
5,000 and 6,000 psi ratings.
Assembly
Effective
Assembly
O.D.
Length
I.D.
BALL CHECK VALVE
Typically run in tandem, the Ball Check
Valve is a safety component used within a
coiled tubing string. It provides one-way
flow to allow fluids, N2, or CO2 to be
pumped through the coiled tubing, while
preventing well fluids from flowing back up
the tubing string. Ball check valves will not
permit drop balls or wiper plugs to be
pumped through to the tool string below.
FEATURES:
• Large bore for high flow rates
• Spring actuated valve ball and cage
ensure positive seal
• Easy field servicing
Multi-Opening
Circulating Sub
Make-up
O.D.
Length
1.500”
6.875”
1.687”
8.400”
1.750”
8.375”
2.000”
8.400”
2.125”
8.375”
Check Valves and
Circulating Subs
