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Drill pipe float valves, or non-return valves, are downhole safety valves that create barriers to prevent unwanted flow of fluids up the drill string. The valve locks down the flow of fluids while the crew at the rigfloor is making or breaking connections.
The Model F Plunger Type Valve provides positive and instantaneous shut off against high and low pressure, assuring continuous control of fluid flow during drilling. For normal drilling operations, the durable Model F is the most economical choice and is available in all sizes. The "Heavy Duty" Model F Drill Pipe Float Valve is designed with a low alloy steel body that increases the life of the Drill Pipe Float Valve. It provides high impact resistance and is dimensionally identical to the standard Forum Drill Pipe Float Valve, allowing interchangeability of the trim. This type of Drill Pipe Float Valve is recommended for use with downhole mud motors.
The Model G "Flapper Type" Full Open Valve incorporates a specially designed flapper which opens quickly and fully to provide a completely unrestricted bore through the valve. The Model G is especially good for use with highly abrasive fluids. When circulation stops, the flapper closes instantly to prevent cuttings from entering the drill string and plugging the bit. The valve opens when the first joint is raised out of the hole assuring the first joints drain and are not pulled wet. The flapper-type valve complements primary blowout prevention equipment to provide complete internal pressure control.
The Model GA Differentail Pressure Monitoring Valve is identical to the Model G except for a hardened1/4 in. diameter tungsten carbide orifice bean insert in the flapper to provide automatic partial filling of the drillpipe during running in. This valve is used when monitoringthe bit head for gas pressure and/or gas pockets, allowing measurement of differential pressure when required.
Model | OD mm (inch) | ID mm (inch) | Thread connection | Float valve |
FZF83 | 82.6(3-1/4) | 31.8(1 1/4) | NC23 B×2-3/8REG B | 1R |
FZF89 | 88.9(3-1/2) | 31.8(1 1/4) | NC26 B×2-3/8REG B | 1R |
FZF105 | 104.8(4-1/8) | 31.8(1 1/4) | NC31 B×2-7/8REG B | 1F-2R |
FZF121-1 | 121(4 3/4) | 50.8(2) | 3 1/2REG B×NC38 B | 2F-3R |
FZF127 | 127(5) | 50.8(2) | 3 1/2REG B×NC38 B | 2F-3R |
FZF121-2 | 121(4 3/4) | 50.8(2) | NC38(B×P) | 3-1/2 F |
FZF165-1 | 165(6 1/2) | 71.4(2 13/16) | NC46(B×P) | 4F |
FZF165-2 | 165(6 1/2) | 71.4(2 13/16) | 4 1/2REG B×NC50 B | 4R |
FZF178 | 178(7) | 71.4(2 13/16) | 4 1/2REG B×NC50 B | 4R |
FZF165-3 | 165(6 1/2) | 71.4(2 13/16) | NC50(B×P) | 5R |
FZF203 | 203(8) | 71.4(2 13/16) | 6 5/8REG B×6 5/8REG B | 5F-6R |
FZF229 | 229(9) | 76.2(3) | 7 5/8REG B×7 5/8REG B | 5F-6R |
FZF241 | 241(9 1/2) | 76.2(3) | 7 5/8REG B×7 5/8REG B | 5F-6R |
Valve model | Vale dia. mm (inch) | Valve length mm (inch) | Hole Dia. mm (inch) | Sub Box thread | |
Thread | Hole mm (inch) | ||||
1R | 42.1 (1 21/32) | 149.2 (5 7/8) | 42.9 (1 11/16) | 2 3/8REG | 231.8 (9 1/8) |
1F-2R | 48.42 (1 29/32) | 158.8 (6-1/4) | 49.21 (1 15/16) | 2 7/8REG | 25.4 (1) |
2F-3R | 61.1 (2 13/32) | 165.1 (6 1/2) | 61.9 (2 7/16) | 3 1/2REG | 266.7 (10 1/2) |
3F | 71.44 (2 13/16) | 254 (10) | 72.23 (2 27/32) | 3 1/2REG | 266.7 (10 1/2) |
3 1/2F | 79.4 (3 1/8) | 254 (10) | 80.2 (3 5/32) | 3 1/2REG | 266.7 (10 1/2) |
4R | 88.1 (3 15/32) | 211.1 (8 5/116) | 88.9 (3 1/2) | 4 1/2REG | 325.4 (12 13/16) |
4F | 92.87(3 21/32) | 304.8 (12) | 93.66 (3 11/16) | 4 1/2REG | 325.4 (12 13/16) |
5R | 98.4 (3 7/8) | 247.7 (9 3/4) | 99.2 (3 29/32) | 5 1/2REG | 374.7 (14 3/4) |
5F-6R | 121.4 (4 25/32) | 298.5(11 3/4) | 122.2 (4 13/16) | 6 5/8REG | 431.8 (17) |
1. Available with a wide variety of sizes and end connections
2. Operating wrench and thread protectors included
3. Major repair kits available for every valve
4. Comes with certified test report
5. Identifiable open and close markings
6. Can be H2S corrosion resistant as per NACE MR0175
Xi′an BOBAN Oil Tools Co., Ltd. Make & Supply a full line of equipment for O& G, horizontal directional drilling (HDD), micro-tunnelling, pipe jacking, etc, In O& G section, we can supply drilling rig component, downhole drilling tools, fishing tools, tubular handling tools, well control equipments, drilling fluid mixing & Recycling system, solid controling equipments and other relevant oiltools,
All our products are API certified, and we are also authorized by ISO: 9001-2000. With advanced production facilities, rigorous quality management, and the joint efforts of our experting staff, Boban has been qualified vendor for many renowned companies in Italy, Germany, Poland, UAE, Kuwait, Egypt, & South East Asia, etc since its establishment in 2018. And obtained a good reputation among the offshore customers as well as other industrial clients.
With our reasonnal prices, quick reaction, high quality products and deliver anywhere on time as well as superior service, Boban has stablished good cooperation relationship with many well-known customers in the world, and also wish to have the chance to work with more and more customers from all over the world! 
1. As a professional oil and gas service company, Boban petroleum has many good experience is selling and serve for the oilfield industries, quality is the culture of the company, we obtained the API standard for all the oiltools, and also certified by ISO:9001-2000.
2. Good service for the communication, delivery and after sales.
3. With rich experience, so we can be your long term supplier.
4. Own factories in China mainland
5. QUALITY SESTEM to make sure the superior high quality
6. Large product series for one-stop service
7. Consulting, suggesting, help find perfect solution
