MAN-TTT-750

MAN-TTT-750
Dual Flapper Valve
MAN-TTT-750 (R01)
Thru-Tubing Technology
A Division of Owen Oil Tools
402 Machine Loop
Scott, Louisiana, 70583, USA
Phone: +1 (337) 984-1181
Fax: +1 (337) 984-3044
www.corelab.com/owen
Warning: Use of Owen equipment contrary to manufacturer's specifications or operating instructions may result in property damage, serious injury or
fatality.
This technology is regulated by and, if exported, was exported from the United States in accordance with the Export Administration Regulations (EAR).
Diversion contrary to U.S. law is prohibited. Export and/or re-export of this technology may require issuance of a license by the Bureau of Industry and
Security (BIS), U.S. Department of Commerce. Consult the BIS, the EAR, and/or Owen Compliance Services, Inc. to determine licensing requirements
for export or re-export of this technology.
This document contains Confidential Information of Owen Oil Tools LP (Owen) and is furnished to the customer for information purposes only. This
document must not be reproduced in any way whatsoever, in part or in whole, or distributed outside the customer organization, without first obtaining the
express written authorization of Owen. This document is the property of Owen and returnable upon request of Owen.
© 2008 Owen Oil Tools
Dual Flapper Valve
page ii
MAN-TTT-750 (R01)
Dual Flapper Valve
Description
The Dual Flapper Valve is run in the tubing string as a safety mechanism to prevent fluid
flow back up the tubing. This is especially important when running coiled tubing in live
wells or where a hole in the tubing at surface would allow the well to flow uncontrolled.
The Dual Flapper Valve is a flapper type back pressure valve that allows flow down the
tubing, but stops flow coming back up the tubing. The Dual Flapper Back Pressure Valve
has two flappers and flapper seals. The second flapper is redundant to the first and is
run where redundant seals are required. The flappers are designed so that a ball can be
pumped through them at minimum fluid flow rate.
Operation
The Dual Flapper Valve is normally run directly below the CT Connector in CT operations
and at the top of the bottom hole assembly (BHA) in snubbing operations. No tubing
manipulation or pressurization sequence is required to operate the tool. The presence of
the Dual Flapper Valve must be taken into consideration during some downhole
operations because the flapper will not allow pressure in the coiled tubing below the back
pressure valve to be bled off at surface.
Note: Unless otherwise indicated, all the strength figures given in
this manual, are the result of calculations based on the yield strength of
the material used in the manufacture of this product. These strength
calculations are considered accurate within plus or minus 20% and are
to be used only as a guide. They do not constitute a guarantee, actual
or implied. In use, appropriate allowance should be made as a safety
factor.
MAN-TTT-750 (R01)
page 1
Dual Flapper Valve
page 2
MAN-TTT-750 (R01)
Dual Flapper Valve
TTT0750-125A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
TOP SUB
TT0750-125A-001
2
1
BOTTOM SUB
TT0750-125A-002
3
1
0.510" ID Check Valve Cartridge (2 Per Assembly)
4
2
O-RING 2-115 80 DURO HSN
TT0750-125AC
PUR-TORV000-115
Tool Name: 1.250 in. OD Dual Flapper Valve
Product Code: TT0750-125A
Tool OD: 1.250 in. Tool ID: 0.510 in.
Material: AISI 4140 HT 30-360 Rock ‘C’
Tool Length: 9.12 in.
Minimum Yield: 105,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The thread recess of the Stub Acme
box connection of the Bottom Sub, 29,650 lbs. Tensile Load to yield the AMMT
Pin Thread Connection: 31,920 lbs. Tensile Load to yield the AMMT Box Thread
Connection: 36,520 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub, 25,550
psi. Collapse pressure on Bottom Sub, 20,500 psi
Torsional Weak Point and Ft-Lbs to Yield: 400 ft-lbs as a function of torsional
yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection – 110 ft-lbs.
0.750 in. MT Connection: Min. Torque – 229 ft-lbs Nom. Torque – 252 ft-lbs Max
Torque – 367 ft-lbs
MAN-TTT-750 (R01)
page 3
Dual Flapper Valve
TTT0750-150A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
TOP SUB
TT0750-150A-001
2
1
BOTTOM SUB
TT0750-150A-002
3
1
0.510" ID Check Valve Cartridge (2 Per Assembly)
4
2
O-RING 2-115 80 DURO HSN
Tool Name:
TT0750-125AC
PUR-TORV000-115
1-1/2 in. OD Dual Flapper Valve w/1.25 in. DFV INTERNALS
Product Code: TT0750-150A
Tool OD: 1.50 in. Min. Tool ID: 0.510 in.
Material: AISI 4140 HT 30-36 Rock ‘C’ Tool Length: 9.12 in. (w/o 0.750 in.
AMMT PIN)
Minimum Yield: 105,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The thread recess of the Stub Acme
box connection of the Bottom Sub, 86,300 lbs. Tensile Load to yield the AMMT
Pin Thread Connection: 31,920 lbs. Tensile Load to yield the AMMT Box Thread
Connection: 36,520 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub, 32,100
psi. Collapse pressure on Bottom Sub, 30,300 psi
Torsional Weak Point and Ft-Lbs to Yield: 600 ft-lbs as a function of torsional
yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection – 390 ft-lbs.
0.750 in. MT Connection: Min. Torque – 344 ft-lbs Nom. Torque – 378 ft-lbs
Max. Torque – 458 ft-lbs
page 4
MAN-TTT-750 (R01)
Dual Flapper Valve
TTT0750-169A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
Top Sub
TT0750-169A-001
2
1
Bottom Sub
TT0750-169A-002
3
1
11/16" I.D. Check Valve Cartridge (2 Per Assembly)
4
1
2-122 O-Ring 1 1/8" x 1 5/16" x 3/32"
PUR-TORV000-122
5
2
8-122 Back-Up Ring 1 1/8" x 1 5/16" x 3/32"
PUR-TOBU000-122
TT0750-169AC
Tool Name: 1.688 in. OD Dual Flapper Valve
Product Code: TT0750-169A
Tool OD: 1.688 in. Tool ID: 0.688 in.
Material: AISI 4140 HT
Tool Length: 12.5 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The thread recess of the Stub
Acme box connection of the Bottom Sub, 29,200 lbs.
Burst Point and Burst Pressure: The o-ring bore of the Bottom Sub,
24,100 psi.
Torsional Weak Point and Ft-Lbs to Yield: 610 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 150 ft-lbs.
MAN-TTT-750 (R01)
page 5
Dual Flapper Valve
TTT0750-175A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
Top Sub
TT0750-175A-001
2
1
Bottom Sub
TT0750-175A-002
3
1
11/16" ID Check Valve Cartridge (2 Per Assembly)
4
1
O-Rings 1 1/8" x 1 5/16" x 3/32" 2-122
PUR-TORV000-122
5
2
Back-Up Rings 1 1/8" x 1 5/16" x 3/32" 8-122
PUR-TOBU000-122
TT0750-169AC
Tool Name: 1.750 in. OD Dual Flapper Valve
Product Code: TT0750-175A
Tool OD: 1.750 in. Tool ID: 0.688 in.
Material: AISI 4140 HT
Tool Length: 12.5 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The thread recess of the Stub
Acme box connection of the Bottom Sub, 37,900 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub,
27,500 psi.
Torsional Weak Point and Ft-Lbs to Yield: 800 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 200 ft-lbs.
page 6
MAN-TTT-750 (R01)
Dual Flapper Valve
TTT0750-181A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1 Top Sub
TT0750-181A-001
2
1 Bottom Sub
TT0750-181A-002
3
1 11/16" ID Check Valve Cartridge (2 Per Assembly)
4
1 O-Rings 1 1/8" x 1 5/16" x 3/32" 2-122
PUR-TORV000-122
5
2 Back-Up Rings 1 1/8" x 1 5/16" x 3/32" 8-122
PUR-TOBU000-122
TT0750-169AC
Tool Name: 1.813 in. OD Dual Flapper Valve
Product Code: TT0750-181A
Tool OD: 1.813 in. Tool ID: 0.688 in.
Material: AISI 4140 HT
Tool Length: 12.5 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The thread recess of the Stub
Acme box connection of the Bottom Sub, 47,200 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub,
30,800 psi.
Torsional Weak Point and Ft-Lbs to Yield: 1,010 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 250 ft-lbs.
MAN-TTT-750 (R01)
page 7
Dual Flapper Valve
TTT0750-213A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1 Top Sub
TT0750-213A-001
2
1 Bottom Sub
TT0750-213A-002
3
1 3/4" I.D. Check Valve Cartridge (2 Per Assembly)
4
1 O-Ring 1 3/8" x 1 5/8" x 1/8" 2-219
PUR-TORV000-219
5
2 Back-Up Rings 1 3/8" x 1 5/8" x 1/8" 8-219
PUR-TOBU000-219
TT0750-169AC
Tool Name: 2.125 in. OD Dual Flapper Valve
Product Code: TT0750-213A
Tool OD: 2.125 in. Tool ID: 0.688 in.
Material: AISI 4140 HT
Tool Length: 14.0 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The thread recess of the Stub
Acme box connection of the Bottom Sub, 57,800 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub,
25,800 psi.
Torsional Weak Point and Ft-Lbs to Yield: 1,490 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 370 ft-lbs.
page 8
MAN-TTT-750 (R01)
Dual Flapper Valve
TTT0750-225A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
Top Sub
TT0750-225A-001
2
1
Bottom Sub
TT0750-225A-002
3
1
3/4" I.D. Check Valve Cartridge (2 Per Assembly)
4
1
O-Ring 1 3/8" x 1 5/8" x 1/8" 2-219
PUR-TORV000-219
5
2
Back-Up Rings 1 3/8" x 1 5/8" x 1/8" 8-219
PUR-TOBU000-219
TT0750-169AC
Tool Name: 2.250 in. OD Dual Flapper Valve
Product Code: TT0750-225A
Tool OD: 2.250 in. Tool ID: 0.688 in.
Material: AISI 4140 HT
Tool Length: 14.0 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The fillet on the Top Sub
before the Stub Acme pin connection, 77,400 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub,
31,100 psi.
Torsional Weak Point and Ft-Lbs to Yield: 2,110 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 520 ft-lbs.
MAN-TTT-750 (R01)
page 9
Dual Flapper Valve
TTT0750-288A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
Top Sub
TT0750-288A-001
2
1
Bottom Sub
TT0750-288A-002
3
1
1" ID Check Valve Cartridge (2 Per Assembly)
4
1
O-Ring 1 3/4" x 2" x 1/8" 2-224
PUR-TORV000-224
5
2
Back-Up Rings 1 3/4" x 2" x 1/8" 8-224
PUR-TOBU000-224
TT0750-288AC
Tool Name: 2.875 in. OD Dual Flapper Valve
Product Code: TT0750-288A
Tool OD: 2.875 in.
Material: AISI 4140 HT
Tool ID: 1.00 in.
Tool Length: 16.9 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The fillet on the Top Sub
before the Stub Acme pin connection, 104,000 lbs.
Burst Point and Burst Pressure: The o-ring bore of the Bottom Sub,
31,800 psi.
Torsional Weak Point and Ft-Lbs to Yield: 4,110 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 1,020 ft-lbs.
page 10
MAN-TTT-750 (R01)
Dual Flapper Valve
TTT0750-313A BOM, Schematics and Specs
ITEM QTY
TOOL PARTS DESCRIPTION
PART NUMBER
1
1
Top Sub
TT0750-313A-001
2
1
Bottom Sub
TT0750-313A-002
3
1
1" ID Check Valve Cartridge (2 Per Assembly)
4
1
O-Ring 1 3/4" x 2" x 1/8" 2-224
PUR-TORV000-224
5
2
Back-Up Rings 1 3/4" x 2" x 1/8" 8-224
PUR-TOBU000-224
TT0750-288AC
Tool Name: 3.125 in. OD Dual Flapper Valve
Product Code: TT0750-313A
Tool OD: 3.125 in. Tool ID: 1.00 in.
Material: AISI 4140 HT
Tool Length: 17.5 in.
Minimum Yield: 100,000 psi
Strength Properties of Tool:
Minimum Yield Point and Load to Yield: The fillet on the Top Sub
before the Stub Acme pin connection, 116,000 lbs.
Burst Point and Burst Pressure: The O-ring bore of the Bottom Sub,
39,100 psi.
Torsional Weak Point and Ft-Lbs to Yield: 5,670 ft-lbs as a function of
torsional yield of the Stub Acme box connection of the Bottom Sub.
Recommended Make Up Torque:
1st Connection: The Top Sub - Bottom Sub Stub Acme connection 1,410 ft-lbs.
MAN-TTT-750 (R01)
page 11
Dual Flapper Valve
page 12
MAN-TTT-750 (R01)
Dual Flapper Valve
1.0 Pre-Assembly
Warning: Make sure all tool parts and components have been
thoroughly cleaned or serious damage and/or injury could occur!
Note: Verify that the correct O-ring redress kit and quantities are
used as specified on the Bill Of Materials (for example, 5 each etc.…).
Lay out all redress kit components on a clean surface.
Note: Make sure to lubricate all O-rings and threaded surfaces.
Note: Visually inspect all parts for damage or wear. Thread parts
together without the O-rings to check fit. Repair or replace damaged
parts.
Caution: Always file wrench marks or burrs and clean off
debris!
Caution: Always visually inspect the Flapper Cartridges after
each job! Check the functioning of the flapper hinge to make sure
that it opens freely and totally! Make sure that the spring applies
sufficient closing force to the flapper hinge and that the flapper
hinge seats sufficiently against the Flapper Cartridge Seat! Also
make sure that the Flapper Cartridge’s pins and springs are
correctly installed! Incorrectly installed, these could cause
damage to the bore of the Bottom Sub!
2.0 Assembly
2.1 Place a Viton seat (included in item #3) onto one of the metal Seats (included in item
#3), then in the Seat groove, position the O-ring (included in item #3) on the side nearest
the Viton seat. Now put the Back up (included in item #3) next to the O-ring.
Note: The Backup O-ring is not required for TT0750-125A or
TT0750-150A.
2.2 Repeat step 1 for the other metal Seat.
MAN-TTT-750 (R01)
page 13
Dual Flapper Valve
2.3 Grease the entire ID of the Bottom Sub (item #2), then take the Bottom Sub and
stand it on it’s pin end.
2.4 Grease the Seats and Flapper Cartridges. Insert one of the Seats, Viton Seal end
first, into the flapper end of a Flapper Cartridge, then insert into Bottom Sub with the Seat
facing up. Tap in with a brass rod that is the same OD as the Seat OD. Repeat for the
second Flapper Cartridge/Seat.
Note: It is recommended to insert the flappers with the side holes of
each Flapper Cartridge facing opposite directions.
2.5 Vise the assembly on the middle of the Bottom Sub.
2.6 Grease the entire ID of the Top Sub (item #1), then thread onto the Bottom Sub.
Make wrench tight.
2.7 A pressure test should be performed to test the integrity of the tool before being ran
in the well bore.
3.0 Disassembly
3.1 Vice the tool in the middle of the Bottom Sub (item #2), then remove the Top Sub
(item #1).
3.2 Take the assembly from the vise and drop it, large ID end first, onto a wood block, to
remove the cartridges and Seats.
Note: Remove and discard all O-rings. Replace O-rings after each
use. Thoroughly clean tool parts in a cleaner approved by state and/or
local laws.
Note: Visually inspect tool for swelling after each use. Damaged or
swelled components must be replaced.
Note: It is recommended that a Magnetic Particle Inspection (MPI)
be completed on all components after each job.
page 14
MAN-TTT-750 (R01)
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