Drilling methods Sample Clauses

Drilling methods. All borings shall be drilled by a method of the Contractor’s choosing unless otherwise specified under the Site Specific Section of the Scope of Service. The method(s) shall be proposed by the Contractor and approved by the COR prior to use. The method(s) shall be discussed in the Contractor work plans. The drilling method must allow, or provisions must be made for, accurate determination of the depth to ground-water surface. If a well is to be installed in a boring, the boring shall be of sufficient diameter to permit at least two inches of annular space between the boring wall and the sides of the centered riser and screen. The boring diameter shall be of sufficient size to allow for the accurate placement of the screen, riser, centralizers, filter pack, bentonite, and grout. The Contractor’s drilling method shall maintain the integrity of the borehole (i.e. prevent collapse) during backfilling or well installation. No grease shall be used on drill pipe joints. The use of any lubricants shall be submitted for approval in the Contractor work plans and shall be noted on the boring logs. The Contractor shall provide documentation (brand name, chemical analysis of product composition, SDS, etc.) to the COR for all materials introduced into the boring during drilling, for approval prior to use.
Sample 1
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Drilling methods. Atna’s program utilized both reverse circulation (RC) and diamond core drilling (DDH) methods. Reverse circulation drilling was used primarily as pre-collars for diamond core tails. This was done to minimize costs in the barren material above the mineralized fault zones. Diamond drilling was utilized to provide better confidence in sample quality than can be expected from RC drilling methods, as well as to provide for rock quality calculations and better geologic definition of the structurally controlled ore zones for engineering and modeling purposes. The distribution of reverse circulation versus core holes is discussed in Section 17.3 of this report. Table 11-2: Summary of Atna Resources Phase I Drilling Hole Number Total Depth RC Footage Diamond Footage APCX-201 440 0 440 APRF-202 788.5 0 788.5 APCX-203 845 400 445 APCX-204 980 385 595 APRF-205 674 385 289 APCX-206 222 0 222 APRF-207 635 635 0 APRF-208 1,090 700 390 APRF-209 676 350 326 APRF-210 645 400 245 APCX-211 1,010 500 510 APRF-212 980 600 380 APCX-213 1,100 700 400 APCX-214 1,020 600 420 APRF-215 1,010 600 410 APCX-216 1,045 460 585 APRF-217 920.5 600 320.5 APCX-218 1080 700 380 APCX-219 1,160 800 360 APCX-220 1248 970 278 APRF-221 1000 000 0000 APRF-222 650 650 0 APRF-223 1300 1000 300 APCX-224 1439 1060 379 APRF-225 1387 1080 307 APCX-226 1412 1100 312 APRF-227 780 260 520 APRF-228 500 500 0 APRF-229 432 432 0 APRF-229A 1515 1045 470 APRF-230 924.5 700 224.50 Total Drilled 29,740.5 18,412 11,328.5
Sample 1
Drilling methods. Any exploration well which the Contractor becomes obligated to drill under this paragraph 1 of Article VI shall be drilled in accordance with generally accepted methods used in the international CBM industry and shall be deemed drilled upon the first to occur of the following:
Sample 1

Related to Drilling methods

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  • Specifications That part of the Contract Documents consisting of written requirements for materials, equipment, systems, standards, and workmanship as applied to the Work, and certain administrative requirements and procedural matters applicable thereto. The term "Specifications" shall also include all written matter in the Project Manual or on the drawings and any Addenda or Change Orders thereto.

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