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  1. coolbreeze

    Custom Design Ball Thrust Bearing - Where to start?

    If the idea of using a roller bearing instead of a ball bearing is novel to you, than it should be getting more obvious that their are commercially available solutions which you have not considered yet in your application. While Koyo, SKF, Timken and the like will provide basic engineering...
  2. coolbreeze

    Bearing Design Assistance

    Looking for a firm that specializes in bearing design. To much to learn in to short a timeframe. If anyone knows of a reputable engineering firm with expertise in oil field bearing design, please provide leads. Houston/Southwest LA area preferred.
  3. coolbreeze

    Non Linear Analysis

    No conversion necessary, Plastic strain is given in the graph of points that are greater than 0.2% strain or yield point. So if you have 0.848% strain of a metallic material, it is by definition in plastic strain. 0.2% is the point where many metallic materials are no longer elastic, meaning...
  4. coolbreeze

    will grounding prevent aluminum corrosion?

    Some Al alloys will oxidize much faster than others. 2XXX series Al is used extensively in corrosion environments, aircraft wheel wells for example. You may want to consider other forms of corrosion. If the Al frame is under load, SCC may also be a problem.
  5. coolbreeze

    Rotating a liner during cementing

    Rotating a liner is common during cementing...it happens regularly to enhance the bond. Somewhere out there in the world today, a liner is being rotating. Given a simple vertical well using API Class A 14.1lb/gal cement. Let's say a 7-5/8” 1000 ft. liner is being rotated in a 8-1/2” hole...
  6. coolbreeze

    Induction hardening 4140/4340 with corrosion protection

    Thanks for the posts guys! I have been reading about induction hardening lately, lots of great posts from "Redpicker" on the subject...I dont think it will be a problem to gun drill afterwards, I have read about the lack of cold sink effect & cooling severity with hollow shafts, if those are...
  7. coolbreeze

    Induction hardening 4140/4340 with corrosion protection

    Greetings, I am working on a project that will require a case hardened hollow shaft (100mmX77mm) The case depth will be about 5mm. Can I corrosion coat the shaft afterwards with a zinc phospate or Xylan coating successfully? I've just not tried this before and I am wondering if it will still...
  8. coolbreeze

    Rotating a liner during cementing

    ...hole. Assume no inclination in the well bore. This is not a special case; I just want to get the formulation down. From dynamics we know that T=I*ω. The moment of inertia is not that hard to get, but how can we account for friction due to the cement. The formulation must include the...
  9. coolbreeze

    Handle material 4041 al vs. 6061 steel, corrosion in atmosphere.

    6061 is one of the lower strength aluminum alloys, about 20ksi. 2024 has a tensile strength of about 60ksi and has good corrosion resistance. You can be sure that it will not be as cheap as 6061 though. Mil-HDBK-5 is one of the best resources available on aluminum alloy properties and it is...
  10. coolbreeze

    High Percision Vacuum Gauge

    Has anyone ever had a problem with vaporization of a curing agent with an epoxy mix? After mixing our chemicals together, we vacuum to remove entrained air. We are having problems with gas(air?) bubbles that remain trapped in the cured structure. The vapor pressures of the curing agent are...
  11. coolbreeze

    Recommendations on Writing a Business Plan

    The "Portable MBA in Entrepreneurship" is one that I have read. There are references to a financial worksheets that is worth the price of the book. Although it is a bit academic, it's full of good information. There is even a companion guide with case studies. Just so you know...
  12. coolbreeze

    Length Limitation for Pressure Calc in Thin Shells

    I think the issue at hand has more to do with the differences in cross section than anything else. Realize that there are corresponding longitudinal stresses that exist with differences in cross section. This is simply due to internal pressures acting on a piston area. Those stresses are...
  13. coolbreeze

    Looking for any advice for a new MWD hand...

    I started out with Anadrill as well, and I can tell you that if you are married your relationship will suffer because you will live on a drilling rig. Working in the Rockies is hard duty because the drilling is slow. I doubt you will be running anything other than directional and gamma ray...
  14. coolbreeze

    Rotating a liner to TD that's still being made up

    I don't know what you are calling a water bushing but I assume it is some type of cross-over between drillpipe/ (top drive connection) and the casing connection. I have designed these before, nothing to them really but I would be especially careful about over-torque reaming in the hole. If you...
  15. coolbreeze

    Rotating a liner to TD that's still being made up

    Why not under ream the open hole the extra 2000 feet to ensure the liner goes in without getting stuck? Is there any formation issues or dog legs that are giving you problems? I thought this was standard practice when running a casing string back to surface? Frank
  16. coolbreeze

    Hydroforming Tubes

    Greetings Automotive enthusiasts, I have been thinking about an alternative to the cold working processes that my company uses to form pipe and I've read a little about hydroforming. I was hoping that someone has expierence in this area. We expand pipe circumferentially inside another pipe...
  17. coolbreeze

    Downhole hydraulic tubing hangers

    This is what I have so far... The ratch latch is apparently a popular item and still sold today. It has left hand threads so you can release it from the hanger by turning it to the right. I haven't had much luck with the SSH style tubing hanger but it may be retrievable!! Otis used to sell...
  18. coolbreeze

    Downhole hydraulic tubing hangers

    OK, you hit the jackpot! I'm a ME on Halliburotn's newest line of liner hangers..Versaflex The old Otis facility is still in Carrollton but of course it is now Halliburton. I may be able to get access to what you need. Tell me the system size, base casing size, weight, and grade along with...
  19. coolbreeze

    Vibratory Stress Relief

    After reading an earlier thread on vibratory stress relief (VSR), I am intrigued about the application as it applies to cold worked low-alloy steel pipe. Meta-Lax is one company that has applied VSR with repeated commercial success. Their applications are specific, that is for relieving...
  20. coolbreeze

    MACHINING RUBBER ?

    We've been sucessful at machining rubber at extremely low temps. Freeze the part and go for it!!!

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