Analyzing the Dynamic Behavior of Some Typical Rotary Bottom Hole Assemblies During Startup
- Key words
- Drilling; Bits; Rotary Rig
- Conference
- Geothermal Resources Council Transactions
- Year
- 1985
- Session
- Software; Drilling; Computer modeling; Bottom hole assemblie
- Language
- English
Abstract
This paper described the current development of a finite element computer program, GEODYN2, capable of simulating the three dimensional transient dynamic interaction behavior of a rotating bottom hole assembly (BHA) interacting within a wellbore intersecting non-uniform formations (comprised of variable lithology and topology). The GEODYN2 Program facilitates a very detailed analysis of the interaction behavior between a PDC bit, in addition of variably shaped (blade dimensions, spiral vs. straight, etc.) stabilizers, and the non-uniform wellbore formations. This capability, in addition to the Programs' ability to simulate response variations attributable to well bore non-uniformities, will be demonstrated. Planned developmental phases will address a drill ahead (rock penetration and removal) simulation capability, and ultimately, the response of the entire drill string.
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