Page 4 Advertisements Column 3

Taranaki Daily News, Volume LIV, Issue 259, 2 May 1912, Page 4

PBOPOSED To be introduced for the BONITHON FREEHOLD PROPERTY, TARANAKI. 1912 Parker-Mogul 20-inch Rotary. Weight 7300 pounds, 6y 2 -incTi diameter Mandrels, 12y 2 -inch diameter Grip Rings, 3-inch circular Pitch Gear Teeth, 3-inch diameter Rotary Screws, 5y,-inch •diameter Rotary- Shaft Bearings Locking Dogs, Chain Guide, recessed base represent important, features of this 1912 special 20-inch Extra Heavy Rotary, for depths up to 5000 feet or for very large diameter holes. ADVANTAGES of the PARKER ROTARY DRILLING SYSTEM.

Ist.—The importance of ADVANCE KNOWLEDGE in the matter of formation in drilling, before it is necessary to set pipe or casing in the hole, will he readily appreciated by producers and prospectors, especially in what is called WILDCAT DRILLING, when seeking oil or gas. With the Rotary System of drilling, prospecting or DRILLING AHEAD to ascertain the formation in which to set casing or to locate artesian water stratas, showings of CAS.or OIL, before it is necessary to finish the hole, is accomplished by using a small -bit and drill stem, -drilling a- SMALL HOLE AHEAD. This gives the producer exact information, without any danger of mistake, as to the proper location for setting casing. This Cannot be done with cable tools. 2nd.—The drilling of a well with the ROTARY SYSTEM, avoiding the setting of pipe until hole is carried down to the depth desired, will save on- an average of nearly 50 per cent, of pipe com.pared with percussion drilling methods., .3rd—ln drilling with the -ROTARY SYSTEM, the bore hole is made LARGE ENOUGH to set casing, without requiring "under-reaming or driving of pipe. 4th.—ln Rotary drilling the use of LEAD SEALS and TELESCOPE SETTING of pipe- for a given depth practically finishes the hole wfth an equal number of feet of pipe to a foot of depth of well. 6th.—NO COLLAPSING of drive shoes, NO STICKING OF PIPE or casing when being set, KO CONSTANT MOVING OP PIPE to prevent sticking, as required in percussion or.cable tool method of drilling, is necessary when drilling with a ROTARY. 6th.—The use of a THICK column of MUD, when, boring with the Rotary System, sustains the walls of the bore hole, prevents" shattering, caving or sloughing, so prevalent when drilling through soft formations, with percussion or Cable Tools/ The Rotary System of drilling makes a perfectly round hole, does not disturb the walls of the formation, and the constant pressure of the column of THICK MUD sustains the walls perfectly until you are ready to set casing. * 7th.—ln shale, clay, sand and gravel beds, so difficult to drill with cable tools, the Rotary System of drilling is the only practical method, at any economical cost, to drill through such formation. The absorption in loss sand and gravel, under pressure of sufficient quantity of mud, WALLS OFF these stratas and PREVENTS CAVING. When drilling into an oil sand, before setting the KEYSTONE WELL SCREEN, such mud as has been" absorbed in the oil sand is WASHED OUT. - Only in very rare instances it is necessary to set any casing through a sand, gravel bed, or artesian water flow, before. finishing the well complete. . Bth.—The saving in pipe cost over the heavy weights required for drive pipe, used in percussion drilling, is an important item, sustaining the walls of the bore hole, with a thick column of mud and boring a hole of ample size to subsequently set pipe with the Rotary is much more economical than the Cable Tool System of drilling in most formations. Oth.-The PARKER BLOW-OUT PREVENTER in' connection with the Rotary System of drilling protects against the loss of a well from high gas or oil pressure of caving from artesian water flows or heaving sand. You Cannot do these things with cable tools. 10th.-The KEYSTONE WELL SCREEN or strainer prevents the heaving of sand, prevents caving of formation above the oil sand, provides a perfect pumping proposition for any loose oil sand formation. nth.-More than TWO HUNDRED MILLION BARRELS of oil have been produced within tho past ten years in the oil fields of Texas, Louisiana and California (U.S.A.) and MANY MILLION BARRELS of oil in Mexico, Dutch East Indies and other sections, from wells drilled with Rotary Tools. 12th.—In any formation containing stratas of rock, the special tools and appliances shown under the title of CORE HEADS, CORE BARRELS, SPECIAL BITS, etc., enables successful drilling of rock strata, either by coring or otherwise without having to set pipe and change over to cable tools advisable in cases where the percentage of rock is not greater than the softer formations. In many instances the Rotary System is used to great advantage in drilling from the surface down to a depth of 2000 or 2500 feet through shales, clays and caving material, at which depth large pipe is set, and then, when advisable, depending on the hardness of the formation, a combination outfit is used, the balance of the drilling being finished with percussion tools. This practice is in vogue quite largely in California and Mexico. , 13th.-The Rotary System of drilling is being rapidly and widely adopted by experienced operators throughout the world WHO HAVE HAD THEIR TROU BLES WITH OTHER METHODS. The ROTARY system of boring « not an expenment, but a thoroughly efficient, RAPID and PRACTICAL method of BORING for GAS, OIL or WATER, where the time of drilling and cost of material is an item. Send us a log or sectioa of your bore holes and we will be pleased to point out other marked advantages of the ROTARY SYSTEM

The Bonithon Freehold Petroleum Company Extended, Limited, having raised sufficient capital to secure a Rotary Boring Plant for Taranaki, are prepared to receive applications for a limited number of shares, not exceeding 1000. Applications to he made at the Company's office, Bank Chambers, Laiubton Quay, Wellington. William McLean, Secretary.