Fascinating Graphs

How do scientists know what is going on when the drill bit is some 300 meters below the seafloor, which is another 1 ½ miles below the ship? By graphs!

Certainly not by watching the whales that came by tonight as the Karaoke music was playing. One of my favorite early morning stops is the Operations Office. Here are a few examples of the graphs I like. (Nice colors!!)

See how the line variations on the third graph(depth) on the chart above, is fairly uniform and slanted to the right. The yellow line shows a progressive increase in the depth. If this line is smooth, drilling is progressing well. The spikes in the first graph, in this case, show changes in the rock resistance, (I believe), and are OK.

In this next graph, the change in the third graph over in the chart is when they had to lift up a little on the drill string to add another pipe length.

The graph above shows that the first graph on the chart, RPMs, is varying. This means that the bit is having difficulty keeping a constant turning speed for some reason so the progression downwards (third graph on the chart) is not progressing smoothly.

 Good night big whale, I hope you enjoyed the music!

 

Comments

Hi Mrs. Kane! I have to say I

Hi Mrs. Kane!

I have to say I agree with Missy about being a little overwhelmed when looking at these graphs! They look fascinating but a little complicated to me as well! I think it is really great that even you still have the opportunity to learn from the other great teachers in this program! Your knowledge must be increasing immensely! I'm really looking forward to your physics class this year because I do not know much about this area of science but I'm sure it will be very interesting! I've heard nothing but great things about the class!

-Madison Riley

Hi Madison! Sometimes I feel

Hi Madison! Sometimes I feel I am in a foreign land listening to a foreign language. I hear that is the best way to learn a language. So, perhaps full emersion (but out to the water still) is the best way to learn this! Thanks for writing

Hi again Mrs. Kane! I am

Hi again Mrs. Kane! I am blogging a lot tonight!
but that whale is so amazing! How big was it, and how close was it?
Also, I am kinda confused about what exactly the graphs mean. I one better than the others?
And also, was everyone on the JR having a karaoke night? That sounds like so much fun!!!
-Emily Fawcett

It is hard to judge distances

It is hard to judge distances out hear. Next time I will bring one of those golf gadgets that tells you how far away something is. The graphs are fascinating because they tell a wonderful story. I have another one from a few days ago that shows how the temperature changes. Many of the crew who work on the rig sing karaoke in the evening. The music come up through the thruster opening. We all enjoy the music. Thanks for writing, Mrs. Kane

Hello again Mrs. Kane! I have

Hello again Mrs. Kane! I have been reading a lot about the JR tonight and I have understood everything pretty well, but when I first saw these graphs, I was so overwhelmed! Did you understand everything at first or did someone have to teach you how to read the graph and understand how they related to the tools being used underwater?
p.s. I like the bright colors!
~Missy Lankard

Hi Missy. I like the bright

Hi Missy. I like the bright colors too! We will both enjoy the color physics unit. The science is so exciting here because people know the science so well and are willing to share. It is very exciting to learn from a good teacher too. There are several here! I find I have more questions than answers which is a bit discouraging sometimes. Still, I ask questions! Thanks for writing, Mrs.Kane

HI mrs kane! Sorry I haven't

HI mrs kane!
Sorry I haven't blogged in a while! It has been crazy with school and soccer. I was wondering if they ever figured out why the drill bit was having difficulty keeping a constant turning speed? If not, do they just let the drill continue until it begins to have a constant turning speed? I can't wait for you to come back to SUA!
-Emily m

Hi Emily, Good to hear from

Hi Emily, Good to hear from you. Wow, 10 blogs this summer!! Thanks for your question!.I think I have the answer. Sometimes the rock they drill through does not easily flush out with the sea water and/ mud they force down the hole. In that case the broken rocks from the drill or perhaps fallen rocks from farther up the hole get in the way of the drill rotation. One thing the drillers do raise is the drill bit some to see if it returns to the same rpms. Carpenters do this too when drilling a hole in wood; if the drill starts binding they pull it up a bit before continuing. Perhaps it should be called "a bit up"...
:)
Mrs. Kane