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

Pump Output, bbl/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

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