China factory customized 8 1/2 Inches Pdc Drill Bit - Float Valve Sub/Check Valve – LUQI factory and manufacturers

factory customized 8 1/2 Inches Pdc Drill Bit - Float Valve Sub/Check Valve – LUQI

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factory customized 8 1/2 Inches Pdc Drill Bit - Float Valve Sub/Check Valve – LUQI Detail:

Product Description of Float Valve Sub

Float valve Sub/Check valve is an important tool in petroleum exploration and drilling engineering. The float valve sub is connected at upper part of drill bit. The float valve sub is near the bit connecting thread. The float valve sub can also be used at different necessary position of drill string when required. The main application is, when connected with single piece pipe, it prevents mud from coming in and up blocking the hole. When blowout takes place, blowout in drill string will be avoided because nozzle is closed automatically by valve cap of the float valve assembly .

Main Technical Parameters

Model	Sub OD(mm)	Connection	Valve OD (mm)	ID (mm)
FFJT241	Φ243.1	7-5/8 REG B×B	Φ121 (5F6R)	Φ76.2
FFJT228	Φ228.6	7-5/8 REG B×B	Φ121 (5F6R)	Φ76.2
FFJT209	Φ209.6	6-5/8 REG B×B	Φ121 (5F6R)	Φ71.4
FFJT203	Φ203.2	6-5/8 REG B×B	Φ121 (5F6R)	Φ71.4
FFJT178	Φ177.8	4-1/2 REG B×NC50 B	Φ88 (4R)	Φ71.4
FFJT165	Φ165.1	4-1/2 REG B×NC50 B	Φ88 (4R)	Φ71.4
FFJT159	Φ158.8	4-1/2 REG B×NC46 B	Φ88 (4R)	Φ71.4
FFJT127	Φ127	3-1/2 REG B×NC38 B	Φ61 (2F3R)	Φ50.8
FFJT105	Φ104.8	2-7/8 REG B×NC31 B	Φ61 (2F3R)	Φ38.1

Product Description of Float Valve Core

The float valve core is a one-flow valve and is set in the inner cavity of the float valve joint, which can effectively prevent formation and wellbore annulus fluids from gushing out from the drilling tool, thereby ensuring well control safety.

Technical Parameters

Vale Size	D Diameter or Valve	R (D plus 1/32) Diameter Recess for Valve	L Length of Valve	T* Diameter of Recess for Battle Plate	Model F ID or Valve
1R	1-21/32	1-11/16	5-7/8	1-5/16	1
1F-2R	1-29/32	1-15/16	3-1/4	1-1/2	1-1/4
2F-3R	2-13/32	2-17/16	6-1/2	1-29/32	1-9/16
3F	2-13/16	2-27/32	10	2-17/16	1-7/8
3-1/2-1F	3-1/8	3-5/32	10	2-11/16	1-7/8
4R	3-15/32	3-1/2	8-5/6	2-15/16	2-5/16
4F	3-21/32	3-11/16	12	3-1/4	2-1/2
5R	3-7/8	3-29/32	9-3/4	3-3/8	2-3/4
5F-6R	4-25/32	4-13/16	11-3/4	4-9/32	3-1/4
6F	5-11/16	5-23/32	14-5/8	5-3/16	4-1/8

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