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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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500<br />

400<br />

3w<br />

200<br />

Nozzle Selection Chart for Given Drilling Sti 'ing, Hole Size<br />

& Working Pressure With Varying Depth & Mud Density<br />

0<br />

1M)<br />

de-1 I . I . I..<br />

1<br />

0<br />

% 250<br />

s<br />

m<br />

z 500<br />

E<br />

v)<br />

750<br />

- 1. loo0<br />

c,j a<br />

1 lZ50<br />

%<br />

s<br />

3 1750<br />

a<br />

0<br />

z2ow<br />

2250<br />

2<br />

Circulation Ra& GPM. (US.)-<br />

ANNUM MLOClPl Ft./Mln. -<br />

,I I I I I I . I I J T I I I I , I I I I I 1 I I I I I I I<br />

120 140 160 180 200 220 240 260 280 300 320 340 360 380 400<br />

USED "SECURITY HYDRAULIC CALCULATOR"<br />

DRILLING STRINGS:<br />

400' of 6 1/4" 0.0. Drill Mlars<br />

+5" Extra Hole Drill Pipes<br />

Hole size: 8 1/2"<br />

Worlting Pressure= 2250 P.S.I.<br />

WMFW<br />

AssurneAnnularVelocity= 230 FVmin<br />

Mud Density= 11 IWgal<br />

Depth= 7000'<br />

Start at 230 F.P.M. Reach 'A' (7000' Line)<br />

Turn for '6' (on 10 P.P.G. Line)<br />

Slant to 'C' (on 11 P.P.G. Line)<br />

Slant back to 'D (on 10 P.P.G. line)<br />

Reach for 'E' (on 224 F.P.M. Line)<br />

(Nearest higher nozzle line to be taken)<br />

Nozzle set 3 x 13/32"<br />

Follow 230 F.P.M. Line to 'F<br />

Find Jet Velocity (360 F.P.S.)<br />

A typical nozzle program<br />

1 x 11/32".<br />

3x318"<br />

Cumdrawn for 10 1Mgal.f~ 10 P.P.G.<br />

AMwill be Me m e point<br />

4<br />

00<br />

00<br />

p1<br />

3<br />

a<br />

8 e<br />

Figure 4-143. Bit nozzle selection nomogram [47]. (Courtesy Harcouff Brace & Co.)

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