01 - Valves 2c1u3y

Surface Testing

VALVES Schlumberger Private

Valves – slide 1

Surface Testing

VALVES

•ex: a 3” gate, ball or butterfly valve, means a 3” ID Valves – slide 2

Schlumberger Private

•Valves or taps are devices fitted to piping or equipment and designed to control the flow of fluids.

VALVES HIGH pressure (5000 psi and above)

Surface Testing MEDIUM pressure (~1500 psi)

LOW pressure (~180 psi)

Separators Oil/Gas manifolds Pumps, Burners

Tanks

1)GATE valves 2)NEEDLE valves (~sampling~)

1)BALL valves 2)PLUG valves

1)BUTTERFLY 2)GLOBE valves

1)WOM new, (McEvoy, Malbranque, Sereg old) 2)Kerotest, Autoclave

1)Mapegaz, Gachot 2)Texseal, Balon

Valves – slide 3

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Flowhead Choke manifold, Sand-trap Heater & Steam-exchanger

GATE valves

Surface Testing

•Used for shut off, (on/off function)

•ex: FH, CM, Steam-exchanger, Sand-trap •Sealing method: -metal/metal for WOM valve -grease sealing compound for McEvoy valve •Standard sizes= 3 1/16” to 4 Valves – slide 4 1/16”

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•High pressure (5, 10, 15, 20Kpsi)

GATE valves

Surface Testing

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WOM

Valves – slide 5

GATE valves

Surface Testing Gate Seal assembly with 0-ring

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WOM

Grease Fitting (for storage only)

metal seals

Valves – slide 6

GATE valves GATE

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WOM

Surface Testing

WOM.exe metal/metal seal

Valves – slide 7

GATE valves

Surface Testing Surface Testing

McEvoy

Sealing done with the special grease

Grease fittings for Special sealing compound grease

Grease fitting for standard grease VALVE CLOSED Valves – slide 8

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(pressure trapped)

reservoir

GATE valves

Surface Testing Surface Testing reservoir

McEvoy

Schlumberger Private

seat gates

• possibility to inject grease under pressure

seat

• selfgreasing/sealing under pressure with valve closed

bottom grease fitting for normal grease only

Valves – slide 9

NEEDLE valves

Surface Testing

Schlumberger Private

•Used for shut off, (on/off) + Flow control (bleed off part of flow) •High pressure (5, 10, 15, 20Kpsi) •ex: instrumentation on FH, CM, Steam-exchanger, Sandtrap •Kerotest (up to 10Kpsi) •Autoclave Engineers (10, 15, 20K) Valves – slide 10

(~sizes= ¼”, ½”, ¾”)

BALL / PLUG valves

Surface Testing

•Used for shut off, (on/off) Schlumberger Private

•¼ turn •Medium pressure (~1500 psi) •ex: separator, burners, pumps, etc. •Sealing method: -PTFE (Teflon) seal ring or seat Standard sizes= 1” to 4” Valves – slide 11

BALL valve (spherical)

Surface Testing

Mapegaz (white teflon ring) (Spherical)

white teflon ring seal

Cross Section of a Mapegaz valve Valves – slide 12

Schlumberger Private

•Sealing=

BALL valve (spherical)

Surface Testing

Gachot Schlumberger Private

•Medium pressure •Sampling / bleedoff points •Sealing= white teflon seal ring

•Standard sizes= ¼”, ½”, ¾”, 1” Valves – slide 13

Surface Testing

PLUG valve (cylindrical) Texseal

top hexagonal nut

O-ring

•Sealing= black teflon seat

Plug (cylindrical)

Valves – slide 14

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Seats (black teflon)

stem

BUTTERFLY valve

Surface Testing

Weco Schlumberger Private

•Used for shut off, (on/off) •Low pressure •Tanks •Sealing= rubber seal •Standard sizes= 1”, 2” 3”

Valves – slide 15

GLOBE valves

Surface Testing

•Low pressure

•Rig Water / air lines •Sealing= metal/metal •Standard sizes= 1”, 2” 3”

Valves – slide 16

Schlumberger Private

•Used for control of flow and shut off

Automatic Control valves

Surface Testing

Fisher Schlumberger Private

•Used for flow control + throttle action •Medium pressure •Separator, Surge tank •Sealing (not 100%)= metal/metal •Standard sizes= 1”, 2”, 3”,4” Valves – slide 17

Swing check valves

Surface Testing Flow through valve

•High/Medium/Low pressure

Flow ceases or fails below back pressure

•Separator inlet, pump outlet

•Sealing= metal/metal •Standard sizes= 1”, 2”, 3”,4” CHECK valves

Valves – slide 18

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•To allow flow in one direction only

Surface Testing

RELIEF Farrisvalves

•High/Medium/Low pressure •Separator, flowlines, Steamexchanger, Surge-tank

•Sealing= metal/metal •Standard sizes= 1”, 2”, 3”,4”

Valves – slide 19

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•Spring loaded and set to open at a given pressure to protect systems from over pressure

RELIEF valves

Surface Testing

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•Piloted safety relief valves •High/Medium/Low pressure •New Separator and Surge-tank

•Sealing= metal/metal •Standard sizes= 3”,4”, 6”

Anderson Greenwood Valves – slide 20

SAFETY

Surface Testing

GATE / BALL / PLUG valves:

Valves – slide 21

Schlumberger Private

• must not be used for throttling (i.e.: must be fully open or fully closed) because a restricted flow through it will erode the seal or gate or seat, and the valve will not seal correctly / reliably.

SAFETY

Surface Testing

GATE valves:

Valves – slide 22

Schlumberger Private

• it is common practice to count the number of turns taken to open / close a valve because the operator can tell if the valve has become plugged or is not seating correctly.

SAFETY

Surface Testing

GATE / GLOBE valves:

Valves – slide 23

Schlumberger Private

• it is best to close the gate and globe valves by ¼ turn after they are fully opened and vice-versa because over tightening the valve upon closing may damage the disk and seat. Leading to seizure or leakage.

SAFETY

Surface Testing

NEEDLE valves:

Valves – slide 24

Schlumberger Private

• when used with an instrument, the valve should only be opened enough: - to permit flow and allow the instrument to correctly. - to allow a quick closure of the valve and to isolate the dial gauge in case of a sudden increase of pressure, above the range of the gauge. One or two turns is usually sufficient.

Surface Testing

Valves – slide 25

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VALVE S The END