Drill Pipe Float Valves Features and Benefits Overview
Valve Body
Oteco valve bodies are manufactured for today’s increasingly harsh drilling environment. All valve bodies are cast out of ductile iron or a low-alloy carbon steel and are heat treated to a hardness equal to or less than 22 Rockwell C (≤ 22 Rockwell C 2 HR) to address the corrosive effects of hydrogen sulfide gas (H2S). Oteco’s integral valve bodies are manufactured from a one-piece casting and are not welded together the way some other competitors produce their bodies. This means that customers receive a superior and more reliable valve body.
Integral Plunger Valves
All of Oteco’s plunger valves are machined from one solid piece of material to produce a more reliable float valve and reduce the risk of downhole valve failure.
Flapper Valves
All Oteco standard-service flapper valves are made of low-alloy steel and then case hardened for wear resistance, thus giving a longer operating life.
Elastomers
Available elastomers are nitrile butadiene (NBR, Buna-N), hydrogenated nitrile butadiene (HNBR) and Viton® (fluoroelastomer, FKM).
Springs
Inconel® springs come standard on all our valves. Inconel® springs are significantly more resistant to corrosion when compared with the standard service springs provided by most other manufacturers. Inconel® springs are also good for sour-gas (H2S) applications.
Interchangeability
All Oteco drill-pipe float valves and replacement parts are manufactured to standard industry dimensions and interchangeable with other major manufacturer’s parts.
Sour-Gas (H2S) Service
Available in both F and G models.
PLUNGER-TYPE FLOAT VALVES:
Model F-Plunger Type Standard
The Model F is a plunger-type float valve that provides a positive instantaneous shut off, providing constant fluid control while drilling. The Model F is a reliable and economical selection under standard drilling operations.
Model FC-Plunger Type Automatic Fill
The Model FC Automatic-Fill plunger-type float valve incorporates a unique key assembly and slotted valve stem to hold the plunger open during run in of the drill pipe and allows the pipe to fill from the bottom, saving time, reducing mess, and avoiding hazards. The plunger is automatically released once circulation begins.
Model FA-Plunger Type Pressure Monitoring
The Model FA Pressure-Monitoring plunger-type float valve has a special port running through the plunger of the float valve. This valve is used when monitoring the bit head for gas pressure and allowing differential pressure measuring when required. The port also permits partial automatic fill during run in.
FLAPPER-TYPE FLOAT VALVES:
Model G-Flapper Type Standard
The Model G is a flapper-type float valve that, when opened, offers an unobstructed bore through the float valve. The uniquely designed flapper closes rapidly to prevent shavings from entering the drill string when circulation stops and also assists primary BOP equipment in maintaining internal pressure control. The valve will fully open when the first joint is raised from the hole, preventing pulling wet joints.
Model GA-Flapper Type Pressure Monitoring
The Model GA Pressure-Monitoring flapper-type float valve is indistinguishable from the Model G with the exception of a tungsten-carbide insert in the flapper valve. The insert has a quarter-inch orifice through the center that allows for differential pressure monitoring. The orifice also allows for partial automatic filling of the drill pipe during run in.
Model GC-Flapper Type Automatic Fill
The Model GC Automatic-Fill flapper-type float valve incorporates a unique self-releasing key assembly that holds the flapper partially open during run in, allowing the pipe to fill from the bottom. This eliminates the need for filling the drill pipe from the top, saving time and money. The valve will fully open when the first joint is raised from the hole, preventing pulling wet joints while avoiding the environmental and safety risks related to having mud on the rig floor. The valve can be run with the automatic-fill option or in the standard, closed position.
Model GCA-Flapper Type Auto Fill/Pressure Monitoring
The Model GCA Automatic-Fill/Pressure-Monitoring flapper-type float valve includes all the advantages of the Models G, GC, and GA. An unobstructed bore through the float valve, when open, permits automatic partial filling of the drill pipe from the bottom and measuring differential pressures when necessary.
OTECO Gate Valves
High Quality Oilfield Equipment and Accessories Since 1948
Model 72
Model 72 Overview
Designed for the oilfield, the Model 72 gate valve is the proven, reliable choice for applications requiring up to 5,000 psi (345 bar) working pressure. The Model 72 gate valve is ideal for corrosive water flood applications, sour gas and crude oil service, as well as certain wellhead applications. Whether used in mud system, floor and standpipe manifold, or flow line application, the Model 72 is field proven for easy operation, tight shut-offs, long life, and simple, fast, low-cost field renewal. Manufactured at OTECO Houston facility, each Model 72 is rigorously tested prior to shipment from the factory.
Sizes: 2 Inch, 3 Inch, 4 Inch, and 5 Inch
Pressures:2000, 3000, & 5000 psi
Services Types: Standard, Sour Gas, Waterflood
Temp. Rating: 250°F / 121°C
Connections: Threaded, Buttweld, Flanged, Union, and OTECO Connector
Model 72 Features & Benefits
- Utilization of Body Subs allow change out of valve connections without changing valve body or entire valve
- Full rising, one piece forged gate and stem displays current valve orientation: open, partially open, or closed
- Extra large ball bearings and heavy duty stem threads minimize torque required for valve operation
- Proven interlocking gate packing and wear plate design protects the valve body and cap during repeated valve opening and closing
- Standard gate packing is designed for a wide range of fluid environments
- Model 72 parts are interchangeable with Cameron type S Flex-Seal valve parts
*Model 66 parts are interchangeable with Cameron type R Flex-Seal valve parts. Although no longer in production, Model 66 support and replacement parts are still available.*
nd mechanical shock. In addition, the heavy duty seals restrict line fluid from entering the gauge mechanism. The gauge mechanism itself is surrounded by a special oil providing resistance to extreme temperatures, as well as vibration and shock. For additional safety, a low pressure plug is installed to prevent gauge case and lens damage. All gauges are available for standard, salt water, sour gas, and oil service.
Model 6 Pressure Gauge
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Model 7 Pressure Gauge
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Model 8 Pressure Gauge
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Manifold Fittings
OTECO manufactures ten different styles of manifold fittings in 2 inch, 3 inch, 4 inch, and 5 inch with working pressures ranging from 3,000 psi to 5,000 psi with test pressures up to 10,000 psi. Each fitting can be supplied with either line pipe threads, or Schedule XX or 160 buttweld end connections. Special connections are available upon request. All fittings are hydrostatically tested prior to shipment and full certification can be supplied upon request.
Available OTECO Manifold Fittings include:
- 45° Long Sweep Ells
- 180° Standpipe Gooseneck
- 90° Long Sweep Ells
- Long Sweep Full Flow Cross
- 90° Long Sweep Ells with 2 in. outlet
- Long Sweep Full Flow Tee
- 160° Standpipe Gooseneck
- Long Sweep Tee
- 160° Standpipe Gooseneck with top outlet
- Long Sweep Y
Wireline Equipment
OTECO manufactures wireline turnback assemblies and components. In addition, we have replacement rollers for BJ model code Roliguide. OTECO also offers complete wireline guide units and wireline guide hanging assemblies for most beam or angle type derrick.
Mud Guards and Oil Guards
OTECO mud guards come in two models: the MG-600 and MG-800. OTECO mud guards have proven cost effective in saving the expense of lost drilling fluids, reduced labor for rig wash down, as well as reducing the potential for accidents due to slippery rig floors. The MG-600 is 6ft. x 10-3/4 in. and can handle drill pipe sizes from 2-3/8 in. to 5-1/2 in. The MG-800 is 6ft. x 16 in., its larger cavity is designed for drill pipe sizes from 2-3/8 in. to 6-5/8 in. and can handle larger volumes of line fluids. Both models can be supplied with neoprene or nitrile end and side seals.
Oil guards have similar in design as the mud guards, the OTECO Oil Guard, MG-500 is 4 ft. x 6 in. and is designed to handle tubing sizes from 2-3/8 in. to 3-1/2 in. The oil guard is proven effective in saving lost oil as well as protecting the environment. As with mud guard, end and side seals are available in either neoprene or nitrile compounds.