Why use invert (oil based) drilling mud?
143007
due to formations bearing bentonite type clay bases. in very basic terms they are like a dryed out sponge when water is added they swell. also when the bottom hole temps get too high your mud will cook out if water based. go online and look up mud logger or mud logging you should find some very useful info there or knowlage as to where to go for futher search
1105402
One amount of the oil to double the amount of carrier oil or of course two parts.\nIt's to make sure the complete mixture isn't too strong
12968
Drilling into the earth is done for a number of reasons. Some are exploratory, many are for oil, some for water, some for mining purposes, and others for various reasons. As we explore the layers of the earth, we uncover many things and have a need to dig deeper into the earth into uncharted regions, not knowing what we will find.\n\nThe deepest drilling ever done by mankind is the drilling that has taken place on the Kola Peninsula in Russia. This drilling started in 1970 and had reached a depth of 12,262 meters, in 1994. The drilling itself was done differently in the Kola Peninsula. The entire drill itself was not rotated; only the drill bit was turned by the flow of drilling mud.\n\nThe Kola Peninsula drill's goal drilling depth is 15,000 meters. At this depth it is expected to be 300 degrees Celsius or higher, too high of a temperature for the drill to operate at. Another drilling worth mentioning has been started in the Caspian Sea. This drill also shares the same goal depth as the drilling at the Kola Peninsula. Aside from drillings for research, a noteworthy drilling is the Bertha Rogers well in Oklahoma, Texas, which is a 9,583 m (31,441 ft) deep gas well. This was the previous world record holder prior to the drilling in the Kola Peninsula. The well was started in 1974 and continued until it struck molten sulfur at its final depth.
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No I have not heard that terminology and I have drilled through salt before. Salt usually washes out, i.e. goes into solution if drilling with a water based mud. \n\nIt must refer to the geological structure of the salt dome itself, pretty much like you can get a '4 way dip enclosure' you could get a salt enclosure of sorts.
283162
it is used to expell worms.\nbe careful not do use for long periods.
914989
Well, lets see if we can think of six reasons ...\n\n1) Tap drill size is too small.\n2) No tapping fluid.\n3) Worn tap.\n4) Tap entering hole at an angle.\n5) Inclusions and/or hard spot in metal.\n6) Tap holder not centered over hole.
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Try this site:\n\nhttp://www.grantprideco.com/drilling/catalog/drilling_Catalogs.asp
1034252
I personally would use a genetic algorithm software program to assess the best places to drill for oil, specific mineral deposits, etc. (Choose one thing to look for).  Accumulate the massive data that is available (satellite imagery, topological information, health statistics, etc.) and input this information along with known locations of the item you are researching.  The genetic algorithm program will output the key criteria that are correlated with your search.  Use that criteria to search for undiscovered resource sites.\nI know this technique works -- I use it for my job.  Good luck!
1000716
The oil is usually within a layer of porous material. Imagine a bucket full of marbles and water. You can get the water out of the bucket without disturbing the marbles much at all.
143244
A rock drill is exactly what the name suggests. They are either pneumatic ( air driven) or electric ( smaller applications) and are used to drill holes in rock for any number of reasons. Usually used in construction. In mines, they are used to make the cavity to house the TNT for detonation.
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Many universities offer courses, either in the Geology or Petroleum Engineering departments.  The AAPG offers a short course coming up in August titled "Basic Well Log Analysis", that is taught by one of the best instructors on this subject, George Asquith. \nhttp://www.aapg.org/education/shortcourse/details.cfm?ID=45\nThere is a mudlogging course being taught at the AAPG convention in Houston in April:\nhttp://www.aapg.org/houston/courses.cfm\n\nI suggest you buy yourself a copy of "Basic Well Log Analysis" by George Asquith and Daniel Krygowski. This is published by the American Association of Petroleum Geologists. To order a copy go here:\nhttp://www.aapg.org/   \nIn the short cut tab at the top of the page go to "bookstore"\n\nWhen you have digested that another valuable resource is the Society of Petrophysicists and Well Log Analysts. You will want to download all of the mnemonics for well logs in order to understand what you are reading. \nhttp://www.spwla.org/\nThey also sell some useful publications. \n\nThere is a logging company called Wellog that has put a free web seminar up on well log interpretation that looks informative (I have not used it):\nhttp://www.wellog.com/interp.htm\n\nThe Society of Petroleum Engineers is another useful resource with excellent publications. \nhttp://www.spe.org/\nSPE publishes many books on well logging but the two introductory books I would recommend are:\n"Well Logging 1- Rock properties, Borehole environment, Mud and Temperature Logging" Monograph Volume 9\nand \n"Well Logging II- Electric and Acoustic Logging" Monograph Volume 10.\nThere are available at:\nhttps://www.spe.org/mbrservices/ShopperIndex.cfm?RptCategPassed=Web&RptCodePassed=mono\n\nIf you have some well log interpretation software, or even if you don't you can find what are called raster logs (image files) on the internet for many states. Louisiana has these at http://sonris-www.dnr.state.la.us/sonlite.htm\nOther states offer them in LAS or LIS format, which requires special software to interpret, but at Schlumberger you can download a free LAS toolbox that will allow you to read these logs:\nhttp://www.slb.com/content/services/evaluation/software/log_data_toolbox.asp\n\nAnother resource you can use that is on my own website (which probably needs to have some links updated) is this list of core and well log repositories:\nhttp://www.carbonates.us/cores.htm
269077
Essentially, used engine oil is better and easier to refine (IE cleaner) then crude. More on it. http://www.epa.gov/epaoswer/hazwaste/usedoil/usedoil.htm
283982
The answer to how oil is drilled can be found here:
226789
I would say because the molecules are too big to be effectively dissolved by chloroform. Or the oils are not polar where chloroform would be polar (remember like disolves like).
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There are several other mnemonics for these types of logs, depending on the company who is logging the well. These include FMI and FMS (Schlumberger), EMI (Halliburton), HMI, OBMI (Schlumberger), STAR (Baker Atlas), CAST, UBI (Shlumberger),FMS, EarthImager (Baker Atlas), and FAC-40. They are generically referred to as electrical borehole images and are essentially sophisticated dipmeter logs. It is a map of the shallow resistivity. Both UBI and OBMI are Schlumberger logs for application in oil-base mud. Schlumberger’s product brochure is here (link to pdf):\n\nhttp://www.slb.com/media/services/evaluation/geology/obmi.pdf\n\nA good introduction is in “Basic Well Log Analysis” by George Asquith and Daniel Krygowski published by AAPG. ISBN 0891816674  If you can’t find this in your library you can get it from AAPG directly (the link is below) and by joining AAPG can get a discount on books. \n\nIn my experience using these logs I have found them incredibly useful for detailed facies analysis, yielding detailed information such as paleoflow direction. Baker Atlas in Houston has a team that is dedicated to this type of depositional analysis. Another excellent application for these logs is in fracture analysis. It is possible to determine frequency and orientation of macro-fractures and use them for directional drilling or other applications such as reservoir evaluation. My experience with oil-based mud image logs has been that they are not as good as water-based logs, however, when oil-base mud is needed, the quality of the image log is not likely to be a priority. Another difficulty you will encounter researching these logs is that they are almost never in the public domain. Unlike common logs such as Gamma Ray and Resistivity, these logs are not required to be turned over to the state (in the US) so they remain locked up in oil company libraries and are not shared with the common suppliers of well logs such as A2D and IHS Energy. In some countries this may be different, but because these logs are expensive to produce they have not been used in many places.   \n\nTo find detailed information I suggest using GeoRef. Most university libraries have access. \nhttp://www.agiweb.org/georef/\nOther resources were you will find information on these logs will be the Society of Petroleum Engineers:\nhttp://www.spe.org/\nSWPLA (Society of Professional Well Log Analysts):\nhttp://www.spwla.org/\nAAPG (American Association of Petroleum Geologists):\nhttp://www.aapg.org/\nA2D is at:\nhttp://www.a2d.com/\nIHS Energy is at:\nhttp://energy.ihs.com/\n\n\nOne resource I found:\nhttp://www.spe.org/elibinfo/eLibrary_Papers/spe/2004/04ADIPEC/00088688/00088688.htm
684008
I've learned that reinventing the well is not really the best solution.\n\nI've tried this solution and it works perfect for my need:\n\nhttp://www.codeproject.com/cs/miscctrl/csharpgridcontrol.asp
779935
Use Good Engine oil for the Best Speed for your PC. HA HA HA dont mind.