Absence of air in well holes eliminate change in pressure?

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Discussion Overview

The discussion revolves around the implications of removing air from an oil well during drilling and whether this action would prevent pressure changes that could lead to a "kick," which is a sudden influx of fluids into the well. Participants explore the effects of pressure dynamics in the context of drilling operations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions if removing air from an oil well and sealing it would eliminate changes in influx and prevent a kick, while also considering the limitations of achieving a complete vacuum.
  • Another participant seeks clarification on the terms "influx" and "kick," indicating confusion about the concepts involved.
  • A different participant suggests that the hydrostatic pressure at great depths would not be significantly affected by reducing the pressure of air at the top of the bore by just one atmosphere.
  • Further elaboration on "kick" describes it as a pressure transient caused by drilling through varying rock densities and porosities, which can lead to sudden pressure increases at the drill head.
  • Some participants reference a previous discussion on the same topic, implying that the question has been raised before and may have been addressed previously.

Areas of Agreement / Disagreement

Participants express uncertainty and confusion regarding the concepts of influx and kick, and there is no consensus on whether removing air would effectively prevent pressure changes in the well.

Contextual Notes

Participants acknowledge limitations in their understanding of the pressure dynamics involved and the complexities of drilling operations, but do not resolve these uncertainties.

ahmed11
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if i sucked air out of an oil well after drilling a few feet and closed the hole by any means and continued drilling without allowing air in, will that eliminate change in influx and won't result in a kick?
or because i can't suck air completely out so the delta p will be really high?
 
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ahmed11 said:
if i sucked air out of an oil well after drilling a few feet and closed the hole by any means and continued drilling without allowing air in, will that eliminate change in influx and won't result in a kick?

hi there
trying to make sense of that ? specially this bit
what influx of what ? what kick ?Dave
 
ahmed11 said:
if i sucked air out of an oil well after drilling a few feet and closed the hole by any means and continued drilling without allowing air in, will that eliminate change in influx and won't result in a kick?
or because i can't suck air completely out so the delta p will be really high?
The hydrostatic pressure at the enormous depths of an oil well wouldn't be affected much by reducing the pressure of air in the top of a bore by just one Atmosphere (which is as much as you can 'suck').
I think that's what you are talking about?
 
davenn said:
hi there
trying to make sense of that ? specially this bit
what influx of what ? what kick ?


Dave
Infux - I don't know.
kick - a pressure transient from the way down at the drill head. Can blow your pipes. I think it comes from plowing (drilling) through changes in porosities ( and densities I guess ) of rock. For example, more porous and the fluid inflow way down under ( maybe that is the influx ) can suddently increase the pressure at the bit and the pressure wave travels up the line to you and your machineray at the surface, and possibly up and down a few time before it dissipates. Probably more complicated that that.
 

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