TECHNICAL MANUAL
TM 202
R-1 INJECTION PRESSURE
OPERATED GAS LIFT VALVE
ASSY. # 0101-XXX
DESCRIPTION
The R-1 Wireline Retrievable Injection Pressure Operated Gas Lift
Valve is a 1 inch O.D. valve primarily controlled by injection gas
pressure. The valve is used to control gas pressure and its flow from
the casing annulus into the tubing during gas lift operations. The
valve is installed in SM-1, SMO-1, SFO-1, SMR-1 or SMOR-1 series
side pocket mandrels.
The valve is designed with a sealed chamber, including a bellows
assembly that contains a nitrogen charge over damp ening fluid. The
bellows serves as an interface between the dome pressure and
injection gas pressure. The dome charge provides the closing force
of the valve. When injection gas pressure exceeds the closing force,
the bellows compresses, lifting the valve stem off the seat, allowing
gas to be injected through the valve and into the tubing.
The R-1 valve consists of a tail plug, upper packing, bellows assembly
with valve core and bellows, bellows housing, stem with tungsten
carbide ball, seat housing, floating seat, lower packing, lower packing
retainer, and nose with reverse flow check dart and optional choke
sizes. The valve is constructed of premium materials for corrosion
resistance in wells with high concentrations of H2S and/or CO2.
Packing and elastomeric materials for the valve are available for
standard and special service.
FEATURES
• Stainless steel or premium materials.
• Three ply monel bellows
• Mechanical stop prevents bellows overstroke.
• Viscous fluid shear dampening prevents bellows fatigue and stem
pounding.
• Tungsten carbide ball and stem assembly.
• Replaceable floating monel seat (tungsten carbide seat
available).
• Integral reverse flow check valve.
• Silver brazed bellows connections.
• Compatible with other manufacturers’ side pocket mandrels.
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TECHNICAL MANUAL
TM 202
VALVE APPLICATION AND OPERATION
The dome of the R-1 valve is charged with nitrogen to a predetermined test
rack opening pressure. Before setting the test rack opening pressure, the
valve temperature or dome charge should be stabilized in a temperature
controlled water bath (industry standard is 60 degrees F). The appropriate top
mounted latch is then threaded on to the top of the valve. This assembly is
then installed into a side pocket mandrel using standard wireline tools and
methods.
When the valve has been installed in the mandrel pocket, the tubing is
isolated from the casing annulus by the valve’s two sets of packing located
above and below the mandrel side ports.
In operation, high pressure gas that is injected into the casing annulus enters
through the ports in the side pocket mandrel. This gas then enters through
the ports in the valve that are located in the bellows housing between the two
sets of packing. When the gas pressure overcomes the nitrogen charge
contained by the bellows assembly, the bello ws is compressed and the valve
stem is lifted off the valve seat, opening the valve. The high pressure gas
then flows through the seat, past the reverse flow check dart, through the
nose and into the tubing. When the gas pressure in the casing annulus drops
below the nitrogen charge pressure contained in the bellows assembly, the
bellows extends, causing the valve stem to seat and close the valve.
The reverse flow check dart in the valve’s nose prevents reverse flow back
through the valve. The check dart seats against a fixed elastomeric primary
seal with a metal to metal secondary seal.
The stem, seat and bellows assembly of the R-1 valve is protected from
damage during valve operation by the dampening effect of silicon fluid
contained in the bellows. When the bellows compresses or extends, the
silicon fluid has to shear flow past a rod installed in the bellows assembly.
The R-1 valve is available with stem and seat sizes of 1/8 through 5/16 inch
and is utilized for continuous flow and intermittent gas lift operations.
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TECHNICAL MANUAL
TM 202
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TECHNICAL MANUAL
TM 202
DISASSEMBLY PROCEDURE
1. Place the valve into a mounted friction wrench gripping onto the bellows assembly (Item 5) just below the
packing such that the latch protrudes to the right of the friction wrench. Using an eight-inch pipe wrench, remove
the latch from the R-1 valve if required. Refer to figure 1.
2. Using a 1/2 inch box end wrench, remove the tail plug (Item 1) from the bellows assembly (Item 5).
CAUTION! High pressure may be contained behind the tail plug and caution must be exercised when
removing the tail plug.
3. Using the valve core tapper, depress the valve core of the bellows assembly (see figure 2 for details of the
bellows assembly) so that the dome charge is vented to atmosphere.
DANGER! If this step is not accomplished, there is a possibility of injury to the people in the work area when
the bellows assembly is removed from the valve.
4. Use an easy-out to remove the copper gasket (Item 2) and a valve core wrench to remove the valve core
respectively.
5. Remove the upper packing vee rings (Item 4) and the upper follower packing ring (Item 3) from the valve.
FIGURE 1
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TECHNICAL MANUAL
TM 202
FIGURE 2
6. Place the valve into the mounted friction wrench and clamp onto the bellows housing (Item 6)
such that the bellows assembly is protruding to the right. Lock the second friction wrench onto
the bellows assembly (Item 5), loosen and remove. See figure 3.
DANGER! If the bellows assembly resists movement at this time, verify step 3 has been
accomplished or injury could result. Galling of threads can also occur.
CAUTION! The bellows can be easily damaged during removal.
FIGURE 3
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TECHNICAL MANUAL
TM 202
7. Place the valve into the mounted friction wrench with the nose protruding to the right. Grip the seat housing
(Item 11) just above the packing. Lock the second friction wrench onto the lower packing retainer (Item 12)
and remove the packing retainer along with the nose assembly. Refer to figure 4.
8. Remove the lower packing vee rings (Item 4) and lower follower packing ring (Item 3) from the seat housing
(Item 11).
9. Using the friction wrenches remove the lower packing retainer (Item 12) from the nose (Item 17).
10. Remove the check dart, check retainer, check seal and check spring from the nose. Inspect the check parts
for damage.
FIGURE 4
11. Place the bellows housing (Item 6) in the mounted friction wrench in such a way that only the seat housing
(Item 11) protrudes to the right. Lock the second friction wrench to the seat housing. Loosen and remove the
seat housing. See figure 5.
12. Remove the retaining ring (Item 8) from the seat housing (Item 11) using internal snap ring pliers.
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TECHNICAL MANUAL
TM 202
13. Tap the seat (item 10) from the seat housing (item 11) by inserting a 1/4" diameter x 6" long wooden or
teflon dowel through the nose end of the seat housing.
FIGURE 5
14. Place the bellows adapter into a vise such that the stem assembly and bellows are protruding out. Loosen
and remove the stem assembly from the bellows assembly using a crescent wrench
WARNING! Be certain not to clamp on the bellows. The bellows material is very thin and even a small nick
from the vise can render the bellows defective.
15. Using an O-Ring pick, remove all O-Rings.
16. Clean all parts thoroughly.
17. Buff the bello ws and bellows assembly clean. Carefully file smooth any marks, which may have been
formed, on the bellows assembly outside diameter.
18. If the valve has been in service, discard the packing, copper gasket, valve core, O-Rings and the check
seal.
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TECHNICAL MANUAL
TM 202
ASSEMBLY PROCEDURE
1. Apply Lubrimatic (white lithium grease) to all O-Rings, vee packing rings, and follower packing
rings.
2. Insert the O-Ring (Item 9) into the seat's (Item 10) O-Ring groove
3. Insert the seat (Item 10) into the seat housing (Item 11). Use a 1/2” x 6” wood dowel to push the
seat into the seat housing (Item 11) so as not to scar the seating surface of the seat. The seat
must be seated at the flat bottom of the seat housing.
4. Using inner snap ring pliers, insert the retainer ring (Item 8) into the retainer ring groove just above
the seat and in the seat housing (Item 11). Be sure it is completely seated in the groove.
5. Apply an even layer of Loctite Thread Locker (Loctite # 243) to the stem threads (Item 7) and
thread the stem into the bellows assembly (Item 5). Be sure that enough Loctite is applied to
assure that there are no voids or cavities between the threads.
6. Prior to assembling each of the following threaded parts, apply Surrender Anti-Seize (non-
petroleum based anti-seize) to the threads.
7. Lock the bellows assembly (Item 5) into one of the friction wrench tools so that the threads are off
to the left side of the wrench. Install the bellows housing (Item 6) over and onto the bellows
assembly, threading it up to its stop. Lock the second friction wrench tool over the bellows
housing (Item 6) and tighten.
NOTE: Care must be taken not to damage the bellows surface during this application.
NOTE: New bellows assemblies come with a new valve core and already have the G.E.
silicon oil fluid injected and more fluid should not be added.
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TECHNICAL MANUAL
TM 202
9. If silicon fluid has leaked from the valve or has been removed, the fluid must be replaced. Remove the
valve core using a valve core wrench. Drain off any remaining fluid from the bellows assembly. Hold the
valve vertically. Inject 4 cubic centimeters of G.E. silicon oil SF96-500 into the bore at the upper end of the
bellows assembly using a large hypodermic syringe.
10. Install the seat housing (Item 11) onto the bellows housing (Item 6) and tighten.
CAUTION! Damage to the bellows housing may result if over torqued.
11. Install the valve core in the opening at the top of the bellows assembly using a valve core wrench, screw
the valve core in firmly, but do not over tighten.
12. Charge up the valve with nitrogen to the desired set pressure. See setting procedures.
11. Install the copper gasket (Item 2) over the tail plug (Item 1). At completion of setting each valve, thread the
tail plug into the bellows assemb ly (Item 5).
13. Fit eight packing vee rings (Item 4) and one follower packing ring (Item 3) onto the seat housing (Item
11) oriented as in Figure 4.
14. Thread the Lower packing retainer (Item 12) onto the seat housing (Item 11) and tighten with friction
wrenches.
15. Place the compression spring (Item 16), check dart (Item 15), check seal retainer (Item 14), and check
seal (Item 13) respectively into the nose (Item 17). Be sure that the orientation is correct on Items 13 &
14 to maintain proper seal.
16. Thread the check nose assembly (Items 13 thru 17) onto the lower packing retainer (12) and tighten
with friction wrenches.
17. Fit the remaining eight packing vee rings (Item 4) and the follower packing ring (Item 3) onto the
bellows assembly (Item 5)
18. Apply an even layer of Loctite Thread Locker (# 243) to the threads of the bellows assembly (Item 5)
and install the latch. Tighten with a friction wrench clamped to the valve and a pipe wrench on the
latch. Be certain that enough Loctite is applied to assure no voids or cavities are between the threads.
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TECHNICAL MANUAL
TM 202
ENGINEERING DATA
Upper Valve Thread 11/16-16 UN 2B
Maximum O.D. 1.015 in.
Overall Length 13.12 in.
Port Sizes 0.125, 0.156, 0.187, 0.250, 0.312 in.
Latch BK-2
Mandrels SM-1, SMR-1, SFO-1, SMO-1, SMRO-1
Metallurgy / Seal Material Stainless Steel, Monel / Nitrile, Viton, GFT/MPS, AFLAS, Neoprene, Moly/Teflon
Max. Test Rack Open Pressure 1,800 p.s.i.
TOOLS REQUIRED QUANTITY
1” Friction Wrench 2
8” Pipe Wrench 1
1/2” Box End Wrench 1
#4 Easy-Out 1
Valve Core Tapper (3/16” X 6” Rod) 1
Wood or Teflon Dowel (1/4 ” X 6” & 1/2” X 6”) 1 each
Hammer 1
Small Bench Vise 1
6” Adjustable Wrench (Crescent) 1
O-Ring Pick 1
File (Me tal) 1
Valve Core Wrench 1
Internal Snap Ring Pliers 1
Hypodermic Syringe (cubic centimeters) 1
SUPPLIES REQUIRED
LubriMatic (white Lithium grease)
Loctite Thread Locker (#242 or #243)
Surrender Anti-Seize (non-petroleum based thread compound)
G.E. Silicon Oil SF96-500
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TECHNICAL MANUAL
TM 202
OPERATIONS HEADQUARTERS
Weatherford Artificial Lift Systems
McMurry-Macco Gas Lift Products
515 Post Oak Blvd.
Houston, TX 77027
713/693-4000
713/693-4372 (Fax)
DOMESTIC OPERATIONS
Texas
Houston Bryan Perryton
281/449-1383 409/778-3778 806/435-5365
281/449-6235 (Fax) 409/260-0447 (Fax) 806/435-5681 (Fax)
Kilgore Odessa Victoria
903/983-5895 915/561-9626 361/575-2328
903/983-5899 (Fax) 915/561-9635 (Fax) 361/575-2155 (Fax)
California
Bakersfield
661/326-0287
661/326-0365
Louisiana
Belle Chasse Lafayette
504/394-2614 318/839-8871
504/394-2674 (Fax) 318/837-0013 (Fax)
New Mexico
Farmington
505/564-8381
505/564-8194 (Fax)
Utah
Roosevelt
435/722-4092
435/722-2087 (Fax)
INTERNATIONAL OPERATIONS WORLDWIDE
Call or fax Weatherford Artificial Lift Headquarters in
Houston, Texas for information regarding the nearest
Representative for your geographic location.
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