It is widely known that the drilling fluid´s primary function is to keep well control and prevent an influx of formation fluid to the well causing a blowout. The mud also prevents loss to the formation by keeping the hydrostatical pressure. Not a big issue in the top sections of the well. As we approach the reservoir, however, the consequences of a loss to the formation is critical. The permeability is reduced, and the danger of emulsion is lurking in the dark.
If you were guaranteed to save 30 hours rig time by investing NOK 250.000 extra - would you do it? Well, someone did and they saved close to NOK 3 million. And got ahead of plan already after drilling the top hole.
Most clients send their equipment on shore to get it inspected and maintained. Is this because of old habits, the nature of the business, or are there situations where it is beneficial to send certified inspectors to the rig?
Topics: Down Hole
A revolution in Wellbore Clean Up as we know it is at hand. OWS is launching a tool designed to withstand the rigors of drilling with the finesse of wellbore cleaning. The technology allows the well to be drilled, and then the casing to be scraped on the same run, eliminating the need for a separate dedicated trip. The new DrillRdillo™ Drilling Scraper can reduce completion time by hours or even days. OWS’ Product Line Manager for Wellbore Clean-Up, Simon Leiper, tells you how it works.
There is always a discussion about where to put the most flow, through the bit or through the hole opener. There are as many points of views on this topic as there are specialist working with top hole drilling.
The question is - when 20% of the opening effect comes from the bit and 80% comes from the hole opener, shouldn't that be reflected in the flow distribution?
We may call them the three defenders of the wellbore: The mud, the casing and the BOP. They all play a vital part in every project. Each one covering up for the other and helping you keeping well control and prevent blow-out.
The drilling jar is the driller’s best friend. Just like a dog will drag its passed out owner out of danger, the drilling jar will help you if your drill string is stuck down hole. However, getting it right is all about the placement.