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Agentm said:This is the way I see it..
initially there was a plan to drill an 8 1/2" drill bit from 14,200 to TD, with the plan to go clean through Sligo and then into the primary..
last week we get the news that the Sligo is methane only... ok thats cool,, I like success just like anyone else on this stock. then they stop.. run wirelines and then case it in..
Hang on case it in????
This wasnt in the plan.. we were told 14,200 to TD 8 1/2" drill..
8. At about 3,000’ the drill string is raised and 14” surface casing is lowered into the hole and cemented in place. About 24 hours is allowed for the cement to set. It becomes a permanent part of the well. Casing is thick steel pipe which comes in various diameters. The purpose of casing is to keep the sides of the hole from caving in. It also keeps drilling fluids from coming up the hole and leaking into surface formations which may contain groundwater. Removing the drill string is a time consuming process because, to do so, it has to be taken apart. This is done 3 or 4 sections at a time, depending on the height of the rig. They raise the drillstring, take off 4 sections (120’ of pipe) stack it off to the side, raise it again, remove 4 more sections etc. At 12,000’, there will be 400 sections of drill pipe in the hole so it takes 100 operations to take it all apart.
9. The drill string is then put back together and drilling continues again with a 12” drill bit.
10. By the time the drill bit gets to around 8,000’ drilling has slowed down to a rate of about 500’ per day.
11. At around 8,500 the drill string is raised. A wireline log is run (see more detail below) and intermediate casing, about 10” in diameter, is installed, cemented in place, and allowed to set for 24 hours. An entire 8,500 length of casing is inserted inside the surface casing. It goes from the top of the hole to the bottom. The bottom section of casing is temporarily plugged with cement. When drilling starts again, this cement will be drilled out by the new bit.
12. A smaller bit, about 8” in diameter is installed on the drill string and drilling recommences. From here to the bottom of the hole, the rate of penetration may slow to 200’ to 300’ per day.
13. At the target depth (around 11,500 to 12,000’) drilling ends. The drill string is raised and the remainder of the well is logged (see below) and analyzed. If it is determined that gas can be produced profitably, production casing (between 4.5 and 5.5” in diameter) is installed and cemented in place. An entire 12,000’ length of casing is installed reaching from the surface to the bottom of the hole (inside the intermediate casing). The well is “shut-in,” that is, capped to keep anything from escaping at the top of the well.
Casing is heavy, large-diameter pipe that is placed into the hole to give the well more structural integrity than would be achieved by a simple hole in the ground. The hole is drilled in sections of decreasing diameter. For instance, in a 12,000’ well, the first section of hole may be drilled to around 3,000 with a bit of around 13 ½” in diameter. Surface casing of around 12” in diameter will be lowered to the bottom of the hole. (Casing also comes in 40’ lengths like drill pipe so it is screwed together section by section). Surface casing is usually run to a depth below the lowest known ground water. The next section of the hole will be drilled with a smaller bit of around 9 ½”. At the desired depth, intermediate casing of around 8 ½” in diameter will be lowered into the hole. This second casing string will extend from the top of the hole, through the intermediate casing, all the way to the bottom. The next section will be drilled to total depth with a 7” drill bit. 5 ½” production casing will then be set extending from the top to the bottom of the hole. Inserting and cementing casing into the hole is sometimes referred to as “running pipe.” In a deeper well, each of the casing sizes described above may be much larger. For instance, in an 18,000' well the surface casing might be around 16" in diameter
Broadside said:the ADI quarterly doesn't seem to reveal anything we don't already know from a cursory glance at the Sugarloaf section
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