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Well Drilling Tricone Rock Bit 12 1/4" FG635G With Gauge Protection

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Well Drilling Tricone Rock Bit 12 1/4" FG635G With Gauge Protection

Name: Well Drilling Tricone Rock Bit 12 14quot FG635G With Gauge Protection
Brand: FLRT
Price: 1 USD

Brand Name : FLRT

Model Number : 12 1/4" FG635G

Certification : API-7-1, ISO 9001:2008

Place of Origin : China

MOQ : 20pcs

Supply Ability : 300pcs per quarter

Delivery Time : 5~45 workdays

Packaging Details : plywood box / iron box

name : roller cone drill bit

Cutting Material : TCI

Standard : API-7-1, ISO 9001:2008

Series : FA

IADC : 637G

Supplementary Features : G : Reinforced Gauge Protection

Shirttail : Alloy Hard Facing

Insert Shape : Conical

TCI : Tungsten Carbide Insert

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12 1/4" FG637G , Well Drilling Bit , Sealed Roller Bearing , With Gauge Protection , Tricone Rock Bit , TCI Bit

RECOMMENDED DRILLING PARAMETERS FOR APPLICATION

Types & IADC Code		417	437 447	517 527	517 527	537 547	617 627	637
WOB	KN/mm(Bit Dia.)	0.4~0.9	0.4~0.9	0.35~1.0	0.35~1.0	0.5~1.0	0.6~1.1	0.7~1.2
WOB	Lb/in. (Bit Dia.)	2285~5142	2285~5142	2000~5714	2000~5714	2857~5714	3428~6285	4000~6857
Rotation Speed (Rpm)		140~60	240~70	125~50	~60	110~50	100~40	80~4

Effects of Nozzle Configuration on Roller Cone Bit Performance

Direct hole bottom cleaning can involve the removal of discrete chips before they are re-ground or the erosion of rock flour, generated particularly by the action of blunt bit-teeth. In both these cases the hydraulics are working against chip hold-down forces related to the difference between the mud and pore pressurest . These can be reduced if the bit hydraulics limit the establishment of a low permeability skin on the hole bottom, thereby indirectly increasing the efficiency of hole bottom cleaning. It is expected that the removal of discrete chips will be controlled by the magnitude of the shear stresses and fluctuating pressures exerted on the chips by the flowing mud. On the other hand, the erosion of rock flour or mud cake will probably be controlled by the impact pressures on the hole bottom.

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