Float Valves(Flapper Type Check Valve)
Float Valve (Flapper Type Check Valve) & Float Valve Sub
This Float Valve is normally installed in a standard bore-back of the bit sub, to provide fluid flow control at the
bottom of the drill stem. It also prevents backflow of cuttings from plugging the drill bit jets while making connections.
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Type
|
Dia. of Valve Assembly
mm（inch）
|
Length Of Valve Assembly
mm(inch)
|
Dia. Of Float Recess
mm(inch)
|
Sub Box
|
Other Popular Connections
|
|
Connection
API
|
Depth Of Recess
mm(inch)
|
Connection
API
|
Depth Of Recess
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)
|
NC23
|
231.8(9-1/8)
|
|
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)
|
NC31
|
260.35(10-1/4)
|
|
3-1/2 F
|
79.4(3-1/8)
|
254(10)
|
80.2(3-5/32)
|
|
|
NC38
|
362.0(14-1/4)
|
|
4R
|
88.1(3-15/32)
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211.1(8-5/16)
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88.9(3-1/2)
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4-1/2Reg.
|
325.4(12-13/16)
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NC44
|
331.8(13-1/16)
|
|
5R
|
98.4(3-7/8)
|
247..7(9-3/4)
|
99.2(3-29/32)
|
5-1/2Reg.
|
374.7(14-3/4)
|
NC50
|
368.3(14-1/2)
|
|
5F-6R
|
121.4(4-25/32)
|
298.5(11-3/4)
|
122.2(4-13/16)
|
6-5/8Reg..
|
431(17)
|
5-1/2IF
|
431.8(17)
|
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