There are basically two types of directional well designs
1. Build and Hold
2. Build, Hold and Drop ( S-Type)
These two profiles are basic profiles. We can design our own profile that we need for our well that well is called as "DESIGNERS WELL".
Now the point is this how we can build angle then we have to hold (maintain angle) the angle and if the profile is S-type then we have also to drop.
These three main steps are mainly dependent on Bottom Hole Assemblies. For each purpose we have to use different bottom hole assembly.
Now First of all we have to build angle for building the angle we will use Fulcurm Assembly then after building the angle we have to maintain it then for maintaing anlge we will use Packed-Hole Bottom Hole Assembly and finally in the drop section in which the well is vertical we use common bottom hole assembly which we use to drill vertical wells known as Pendulum Assembly.
In all of these assemblies only the difference is of arranging drill collars,heavy weight drill pipes and stablizers mainly.
This is small article generated by me......
Hope you find this little information helpful
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this article is really contain informative knowledfe..
ReplyDeletesir can u plx elaborate the different assemblies n the conditions under which different wel designs are made?
yes, offcourse these differnet assemblies you can find in any book related to directional drilling the difference in all the assemblies is only of arranging the drill pipes collars and stablizers as i have mentioned above in my article for example you can use only 1 stablizer is run above the bit to achieve fulcurm effect but you can use additonal stablizers to modify the build rate....
ReplyDeleteand secondly for the condition i suggest you read the article directional drilling and its applications.
Thank you