Comments on: Understand Hydrostatic Pressure

By: How much pressure will we see at cement head in case of float shoe fail?‎

How much pressure will we see at cement head in case of float shoe fail?‎ — Sun, 16 May 2010 18:19:38 +0000

[...] still have the simple but interesting question about hydrostatic pressure which you can apply this calculation into drilling/cementing operation. The question I got about [...]

By: Let’s apply U-Tube concept‎

Let’s apply U-Tube concept‎ — Sat, 16 Jan 2010 18:45:40 +0000

[...] drill pipe side: BHP = 0 psi (Drill pipe Pressure) + 0.052×9.8×8,500 (Hydrostatic Pressure at drill pipe side) = 4,331 [...]

By: Doug Hubbard

Doug Hubbard — Tue, 05 Jan 2010 12:47:15 +0000

We do Horizontal Directional Boring with hole diameters upward to 54″ through which we pull a 36″ HDPE pipe.
The depths are geneally only 20-40 feet deep and the lenghts are upwards to 2000 lineal feet.
We are constantly in discussions that we need to be deeper to help prevent frac outs and potential groung heave issues with the Engineers reoresenting our customers.
I know that there are many variables that impct these issues, but it would be most helpful to be able to identify where the ground pressures vs hyrostatic indicate potential problems in soil conditions of sand, clay, or rock.
Can you help?
Thanks.

By: Bottom Hole Pressure Relationship ‎

Bottom Hole Pressure Relationship ‎ — Mon, 04 Jan 2010 23:47:53 +0000

[...] so formation pressure at 8000’ TVD = 8000 ft x 0.465 psi/ft = 3720 psi. Click here to learn how to calculate hydrostatic pressure in [...]

By: What is Primary Well Control?‎

What is Primary Well Control?‎ — Wed, 23 Dec 2009 21:25:33 +0000

[...] Well Control is hydrostatic pressure provided by drilling fluid more than formation pressure but less than fracture gradient while [...]