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Example: Calculate the hydrostatic pressure for
10,000 feet of 12.0 ppg mud.
Solution: H.P.=0.052×12.0ppgV10,000ft=6.240psi Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 4 2 A mud gradient can also be used to
calculate hydrostatic pressures:
Mud Gradient= .052×Mud Weight (p.p.g.) and
The hydrostatic pressure=Mud Gradient ×Depth 5 3. Blowout preventers
The equipment designed to seal the well is
called blowout preventers and may consist
of either drill pipe blowout preventers
designed to control the flow through the
drill pipe or annular prevetners designed to
control the flow in the annulus.
6 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 3 B. Description and special design
features of blowout preventers.
1.Annular blowout preventers
Spherical preventers 7 Fig.1 Spherical Preventer Sealing Action Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 4 Fig.2 Cut the new rubber between the ribs and install the new
element in a process reversed from the removal sequence 9 F...
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This document was uploaded on 03/28/2014.
- Fall '14