## Annular Velocity

What is the annular velocity at 110 SPM on one pump, opposite:

a. Drill Collars/Open Hole (AV0h/dc) _ft/min b. Drill Pipe/Open Hole (AV0H/DP) _ft/min c. Drill Pipe/Casing (AVCSG/DP) _ft/min

The annular velocity defines the average velocity at which the mud passes through a specific annular space and is normally expressed in units of ft/min.

Annular Velocity( AV), ft/min

Annular Capacity, bbl/ft Q

Annular Capacity

The following annular velocities opposite specific intervals will be based on pump output at 110 SPM and 94% volumetric efficiency.

a. Drill Collars/Open Hole, AV0h/dc Q

OH/DC

OH/DC

AnnOH/DC = (8'5]2 (6'5)2 = 0.02914 bbl/ft OH/DC 1029.4

am (7.634 bbl/min) ftlmin

b. Drill Pipe Open Hole, AVOH/DP Q

Ann AV

OH/DP Ann nOH/DP

0.05051 bbl/ft

c. Casing/Drill Pipe, AVCSG/DP

CSG/DP

CSG/DP

CSG/DP

AnnCSG/DP

### (8l835)2-(4l5)2

1. 4 (7.634 bbl/mln) ( 0.0561 6 b b l / f t )
2. 05616 bbl/ft 136 ft/min
• Figure 6]
• Figure 6]
• Figure 6]

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### Responses

• Demsas
What is Opposite Drill pipe in open hole ?
1 year ago
• ELLIOTT KELLY
How is annular velocity expressed in drilling?
7 months ago