Page 345 - Practical Well Planning and Drilling Manual

Section 3 revised 11/00/bc 1/17/01 12:00 PM Page 321

Well Control [ ]
3.1.4

A swabbed kick was taken, or difference in TVD between the cas-
ing shoe and the horizontal wellbore is small (well kicked off to
horizontal just below shoe or through a casing window).
If a balanced kill is to be used, the Phase 1 calculations require the
static and dynamic pressures to be calculated separately. The increased
dynamic pressure loss through the drillstring is calculated as before,
but the reduction in surface pressure during Phase 1 due to heavy mud
being pumped will be different.
400
350
Pump Pressure Phase 1 250
300

200
150
100

50
0
0 92 184 276 369 461 553 645 737 829 921
Pump Strokes Phase 1
Fig. 3-1 Horizontal Phase 1 Circulating Pressures Using Conventional Kill Formulae

400
350
Pump Pressure Phase 1 250
300

200
150
100
50
0
0 92 184 276 369 461 553 645 737 829 921
Pump Strokes Phase 1

Fig. 3-2 Horizontal Phase 1 Circulating Pressures Calculated for Maintaining
Constant BHP

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