Page 118 - Formulas and Calculations for Petroleum Engineering

Drilling engineering formulas and calculations Chapter 2 111

Formula(s)

ð
ð
QM MW POÞ QW PO PWÞ
QU ¼
PU PO
35 PU
FU ¼
QW
35 MW + 35 PWð Þ
QM
QM QU FUÞ
ð
QC ¼ CC
42
ð
QM QU FUÞ
QD ¼ CD
42
ð
ð
ð QM 35 MWÞÞ QU 35 PUÞÞ 0:6129 QC 0:6129 QD
ð
QP ¼
35 PW
QC QD

QB ¼ QM QU QP 35
21:7 21:7
Reference: Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 99.
2.84 Evaluation of hydrocyclone
Input(s)
MW: Average Density of discarded mud (ppg)
V: Volume of Slurry sample collected (quarts)
T: Time to collect slurry sample (s)

Output(s)
SF: Fraction percentage of solids (fraction)
MS: Mass rate of solids removed by one come of a hydroclone (lb/h)
WR: Volume of wate ejected by one cone of a hydroclone (gal/h)

Formula(s)

MW 8:33
SF ¼
13:37
V
MS ¼ 19530 SF
T
V
WR ¼ 900 1 SFÞ
ð
T
Reference: Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 97.

2.85 Fluid volume required to spot a plug

Input(s)

L t : Length of Tubing or Pipe (ft)
L p : Length of Plug (ft)
C t : Tubing or Pipe Capacity (bbl/ft)
V s : Spacer Volume behind Slurry (bbl)