For maximum production over entire life of an oil and gas well, We require a good primary cementing job. This totally depends on proper centralization. So good centralization is necessary to obtain good mud removal, which is only achievable by correct selection of centralizers and their installation pattern. At SledgeHammer You can achive this objective.
Primary cementing is the process of placing cement between the casing to make a shield to well bore and to replace the mud by cement slurry.
The primary cementing process involves pumping of liquid cement through the casing, around the bottom and into the annulus and replacing the drilling fluid or formed mud. Cement is pumped in a manner which is much higher in the well bore or casing annulus then inside the casing to protect and isolate all the previous exposed formation and also to protect casing against corrosion. In today’s scenario, wells are much deeper and hotter as it was in the past. This increased the complexity and engineering techniques in drilling. No wonder therefore cementing and casing operation has become one of the most important and expensive phases of well drilling.
The essential factor for a successful cementing job is the replacement of the drilling mud or the well bore fluid with cement slurry. Removal of mud depends on the various inter linked operations. This helps bore hole to be stabilized, in gauge, free from cuttings and severe Doglegs. The circulation of cement slurry at least in one Hole volume is common processes, which breaks Mud Gel, cleans the hole, homogenize the mud and ensures that gas is not flowing.
The most common factor for mud removal is the degree at which pipe is centered in the well bore. When the pipe is not properly centered, as is the case in most wells the moving fluid tends to move more freely through the wider portion of the annulus and leave displaced mud in narrow pockets in the cement sheath. The undisplaced mud can cause problems with zonal isolation and create the need for secondary cementing job. This results in massive loss of time, labour, money and the overall production. It has been observed that perfect centering is not possible to give a stand off of 100%. A stand off ratio of 75% is considered as a minimum requirement by most of the operators and it considered as a good mud removal.
Therefore, at SledgeHammer, the main critical part of centralizer, which is responsible for centering of casing, all standoff and restoring force is SPRING BOW, An in house production with adequate technique in automated heat treatment furnace controls the uniformity of required hardness of bow, resulti ng in better Stand off & Restoring force for every Centralizers. Twice tested hardness of each bow ensures the required uniform hardness. The 12 times pressing of each bow ensures the required spring action for better Stand off & Restoring force. Our every Spring Bow follows the Quality Standard as per API 10D norms. Testing of Raw material, for Chemical Testing, Tensile, Yield, Elongation and Bend testing on Most Modernize Spectro Meter and Tensile tester Machines. At SledgeHammer we work with the best of process techniques and quality products and always look for the improvement.