Keystone Energy offers a wide variety of different types of float valves for all drilling applications.
Keep reading to see what Drill Pipe Float Valves we have to offer and what makes them the best oilfield tools on the market.
How are Keystone's Drill Pipe Float Valves Made?
At Keystone, we recognize the severity of drilling with a reliable and trusted valve - float valves are essential for drilling, and must stand the test of harsh environments.
Keystone's float valves are precision manufactured from high-grade materials and perform optimally in drilling environments.
We offer certified, pressure-tested float valves. As a leading manufacturer of float valves, we recognize the severity of drilling with a reliable and trusted float valve; For this reason, we offer certified float valves that are serialized.
Additionally, we will provide certification of high-and-low pressure tests upon request.
What Are The Spec Details of Keystone's Drill Pipe Float Valves?
Unique Valve Body
All of Keystone's drill pipe float valve cages are manufactured for today’s increasingly harsh drilling environment.
Superior and more reliable valve cage
- All cages are cast out of alloy 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).
- Keystone’s integral cages are manufactured from one-piece casting, and are not welded together the way some other competitors produce their cages.
- We offer stainless steel & Nickle Plated valves for highly corrosive environments
Interchangeability Options
All Keystone drill-pipe float valves and replacement parts are:
- Manufactured to standard industry dimensions
- Interchangeable with other major manufacturers’ parts
Baker® Style Model Compatible
All KET Float Valves, baffle plates, and valve pullers are interchangeable with:
- Baker® Style Model F Float Valves
- Baker® Style Model G Float Valves
Spring Options
Elgiloy, Inconel® or stainless steel springs come standard on all our valves.
Our high alloy springs offer unique qualities:
- Can be used in sour gas (H2S) applications
- Significantly more resistant to corrosion when compared with the standard-service springs provided by most other manufacturers.
Elastomer Options
Available elastomers are nitrile butadiene (NBR, Buna-N) and Viton® (fluoroelastomer, FKM)(H2S Applications) and Aflas (steam service).
- Standard Service Buna Nitrile (212 Deg F) Temperature Rating
- Hi-Temp Viton (450 Deg F) Temperature Rating
- H2S Service Viton (450 Deg F) Temperature Rating
- Steam Service Aflas (475 Deg. F.) Temp rating
Different Operating Pressure Options
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- For Standard valves - 7,500 PSI working pressure
- For High pressure valves - 10,000 PSI working pressure
Sour-Gas (H2S) Service Option
Available in both F and G models.
Dimensional Data
A = L (Length of Float Valve) + Length of Tool Joint Pin + 1/4” Clearance
Which Types of Casing Drill Pipe Float Valves Does Keystone Offer?
Keystone offers the following three types of Drill Pipe Float Valves:
- Plunger-Type
- Flapper-Type
Plunger-Type Float Valves
All plunger valves are machined from one solid piece of material, producing a more reliable float valve and reducing the risk of down hole valve failure.
This produces plungers that are invariably either shrunk fit, screwed, or welded together.
Model F – 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 – 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.
This assembly allows the pipe to fill from the bottom, saving time, reducing mess, and avoiding hazards.
Model FA – Pressure Monitoring
The Model FA Pressure-Monitoring plunger-type float valve has a special port running through the plunger of the float valve. The port also permits partial automatic fill during run in.
This valve is used when monitoring the bit head for gas pressure and allowing differential pressure measuring when required.
Flapper-Type Float Valves
Our standard-service flapper valves are made of low-alloy steel and then case hardened for wear resistance, thus giving a longer operating life.
Model G – 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 GC – 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 GA – 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 GCA – 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.
Keystone's Full Line of Float Valves
At Keystone, we recognize the severity of drilling with a reliable and trusted valve - float valves are essential for drilling, and must stand the test of harsh environments.
KET’s full line of Float Valves includes
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Drill Pipe Float Valves
About Keystone Energy Tools
Keystone Energy Tools is a manufacturer with over fifty years of combined experience in designing, manufacturing, and delivering high-quality oilfield tools, including elevators, slips, dies and inserts, tongs dies, safety clamps, stabbing guides, drill pipe float valves, baffle plates, float valve pullers, rotating mouseholes, and tong blocks.
By using the latest in 3D modeling for product design and by staying current with the rapid advances in manufacturing technology and quality-assurance standards, Keystone is able to manufacture and produce the most reliable products on the market today.