DOUBIL INC. is a member of the Canadian Association of Oilwell Drilling Contractors (CAODC) serving the Oil and Gas and Mining Industries in Eastern Canada with rigs stationed in Ontario and New Brunswick. DOUBIL INC. is experienced with air drilling and down-hole-hammer drilling techniques, as well as standard circulation using fluid or air or any combination of the two, including while directional drilling. Equipment list, rig availability and location available on request.

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On all vertical holes, Doubil’s target circle at the toe of the hole is defined by a 1° cone from surface; ie: the diameter of the target circle is twice the tangent of a 1° angle (approximately 17.5 ft per 1000 ft of vertical depth), as measured from surface. All vertical deviations reported on the Work Summary - Mining sheets (included with Doubil’s brochure) are shown in degrees for vertical holes, and collar and toe coordinates for directional holes. Update - 26th August 2002 FALCONBRIDGE Kidd Creek- ‘D’ Mine - Wet Concrete and Wet Shotcrete Delivery, 12 1/4" blind holes - 4,922 ft, lined First Closure (plan view - collar to toe), slightly under 50 ft at the above depth. Second Closure (plan view - collar to toe), slightly over 14 ft at the above depth. These vertical holes were drilled to service the underground expansion of Kidd Creek mine known as ‘D’ mine. There was no exposed bedrock at the collar, so each 17 ½" surface hole was drilled through overburden into bedrock where a casing was set and cemented to prevent water entry. 12 1/4" main holes were drilled with air hammers top to bottom, however both main holes encountered substantial water incursion delaying drilling progress (until overcome). Deviation surveys were taken at regular intervals to monitor hole bottom position with a gyro survey taken at the toe to determine intercept coordinates. Though the two holes were drilled from the same pad, the first hole crossed through a fault which the second hole did not encounter. Upon completion of the drilling of each hole and an integrity check, a liner was lowered into each hole and cemented into place bottom to top. De-watering of the liner then took place to allow mine interception of a dry liner. Both holes (liners) were intercepted safely by mine crews. Deviations were calculated at 0.577° and 0.165° from surface. The purpose of the two holes is to provide surface access to concrete for the construction of shaft, headframe, hoist room, shaft stations and wet shotcrete for development work without tying up shaft time and crews at a distant surface shaft. With a contractor’s plant now in place, either hole can be used for either product when needed. INCO North Mine - Slag Delivery, breakthrough hole - 2,447 ft, unlined Closure (0,0) to (219,-558) The 890 block at North Mine is situated under the north end of the town of Copper Cliff, more specifically, under several residences. The mining plan for this ore required INCO to backfill the block in order to continue mining, however lack of development rock and direct surface access required a different solution. From nearby INCO property, Doubil Inc. collared a vertical hole then directionally drilled a 2450 ft long 9" pilot to the designated target. The designated target was a surveyed ‘X’ INCO painted on the top sill drift back (at approximately half the block length) where the hole was to break through. The offset collar to toe in the plane of the hole was 600 ft. The hole was then reamed to 15" diameter over the full length. WILLIAMS OPERATING CORP. - Wet Shotcrete Delivery, 9" blind hole, lined Closure (plan view - collar to toe), slightly over 17 ft at 2,306 ft This hole was spudded in the Lake Superior steeply north dipping north shore granites at Hemlo. With the exception of the sediments drilled through at McArthur River, we had never encountered such an abrasive rock to drill. FALCONBRIDGE Lindsley - Rock Fill Delivery, blind hole - 3,904 ft, unlined Closure (plan view - collar to toe), slightly under 5 ft at the above depth. This project called for a 9" pilot hole, a mine interception of the pilot hole, then a hole opening to 15" diameter to total depth. CAMECO McArthur River - Ore Slurry Hydraulic Hoisting, breakthrough holes First Closure (plan view - collar to toe), slightly over 5.5 ft at 2,093 ft. Second Closure (plan view - collar to toe), slightly over 6 ft at 2,106 ft. Massive water filled lost circulation zones within the first 1,600 ft of sediment required Doubil to drill into the Precambrian with a combination fluid/air circulation to get returns. To prevent flooding of the mine, a 9 5/8" casing was run and cemented at this point. Drilling continued with air through this casing to a depth 20 ft less than the breakthrough elevation. A concentric 7" casing was set and cemented back to surface at this point. After drilling out this casing but before breakthrough, the hole was again checked to ensure that all water from above had been stopped. Both holes collared only 6 metres apart on surface broke through into the correct drift as confirmed by visual inspection. To finish the project, CAMECO designed a casing string to be run inside the 7" to handle the radioactive slurry. This casing was suspended from surface and could be replaced if warranted. POTACAN Sussex - Bitumen Injection, blind hole - 2,330 ft, many casings Up to this project, all the main holes had been drilled with air and down-hole tools. This hole was directionally drilled with fluid in sedimentary rock rather than volcanic rock. Several casings of progressively smaller diameters were set and cemented to shut off water and prevent hole sloughing. Two final concentric casing strings were suspended from a surface wellhead. This enabled a hot oil (+400°F) circulation to keep a viscous bitumen flowing into and along a water bearing fault. Many thousand tons of bitumen were pumped down our hole while similar volumes of cement slurry were pumped down another. Contact between hot bitumen and cement slurry immediately hydrated the cement. INCO McCreedy East - Pastefill Delivery, 12 1/4" blind hole, lined, 4,264 ft Closure (0,0) to (61,-666) Directional drilling techniques were used to reach the toe target (which was under the middle of a small lake). This hole was started vertically, then at 600 ft was deviated on an azimuth towards the target. Doubil built angle from the vertical at the rate of 3° per 100 ft until the required tangent angle was established. Regular drilling resumed with frequent checks on tangent angle and azimuth. Corrections were needed when the trajectory crossed an unmapped fault line. The small build rate allowed casing to be run easily. Doubil Inc. installed a casing (liner), cemented it into place and de-watered it prior to INCO’s interception. INCO Stobie - Pump Column, 4 Phases - 3,958 ft, lined This was supposed to be a lined vertical hole, but after drilling down 1,400 ft, the hole was plugged back and deliberately drilled (in a spiral) away from and around an abandoned ore pass. Unwanted ‘communication’ with the ore pass had been established via cracks and faults in the rock between 1,000 and 1,200 ft. This project involved the drilling of a 12 1/4" blind pilot hole, the mine’s interception of the toe, a hole opening to 18" and 20" (reaming from the top down), the installation of a 16" casing at the toe interception to isolate the hole, the running of a combination casing string (13 3/8" OD between 3,900 ft and 1,700 ft and 16" OD from 1,700 ft to surface), a three stage casing cementing job and a casing de-watering. INCO Stobie - Wet Shotcrete Delivery, 9" blind hole - Doubil’s first project The toe of this hole was slightly outside the 1° defined target circle, but the length of the intercepting drift was significantly less than the diameter of the target circle at a depth of 1,878 ft (37 ft vs. 66 ft). Doubil Inc. installed a casing (liner), cemented it into place and de-watered it prior to INCO’s interception. INCO has developed a safe procedure to do this with no damage to the casing.

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Doubil Inc. has drilled a number of exploratory and development holes in sedimentary basins in Ontario and the Maritime Provinces. Usually several casings are run to satisfy provincial government requirements to maintain well control, and to prevent commingling of fluids from different production zones. The majority of exploratory holes are vertical, unless surface access is somehow restricted. Development holes tend to be drilled directionally towards defined targets, or as has happened in the industry within the last 15 years, turned 90° to horizontal and drilled within a particular productive horizon. In all cases of either directional or horizontal work, sub contractor’s tools and expertise are melded with our equipment and expertise to produce the desired end result. Update - 26th August 2002 DUKE ENERGY (Union Gas Limited) These two horizontal gas storage wells were unique. The Operator did not want to flood its porous gas reservoir with fluid while drilling, choosing instead to under-balance drill the formation even though the reservoir was at a pressure greater than 500 psi. The Operator chose to drill the gas reservoir with air. The wells were started with conductor and surface casings installed by cable tool rig. Doubil Inc. then rigged up its Rig #3, nipped up BOPs and fluid drilled to intermediate casing point. Below intermediate, the hole was turned from vertical with a motor assembly and directionally drilled with fluid towards the flank of the reef. As the bit and motor assembly approached the flank, timed drilling and continuous sampling allowed progress to be stopped in the cap rock formation for the setting of production casing. A smaller bit and motor assembly drilling inside the production casing finished the turn to horizontal then drilled across the designated stratum of the production zone using air to power the motor and circulate cuttings to surface. A special containment unit on surface separated the solids and liquids from the natural gas, sending the latter to a flare stack. Total measured length of air drilling in each well was approximately 700 metres. CORRIDOR RESOURCES INC. DEVON CANADA CORPORATION Both of the above wells were drilled with air and down hole hammers where possible to minimize hole deviations in this ‘crooked hole area’. COLUMBIA NATURAL RESOURCES CANADA This well is the longest hole that Doubil Inc. has drilled to date. Measured length was in excess of 2500 metres. Surface, intermediate and main hole sizes were drilled with air using down hole hammers as much as possible to minimize hole deviation problems. ENBRIDGE CONSUMERS’ GAS These wells, though horizontals, were drilled with fluid through the storage reef producing horizon. GREENTREE GAS & OIL As above, these horizontals were drilled with fluid through the producing formation. CAMBRIGHT GAS CORP. These two wells were the first wells in Ontario to be drilled horizontally with air. One well had a horizontal leg of 350 metres, the other 425 metres. The Operator did not want to contaminate the low pressure gas production zone with fluid.

[Mining Project Highlights] | [Oil & Gas Project Highlights] | [Contact Info]

[Mining Project Highlights] | [Oil & Gas Project Highlights] | [Contact Info]