Slightly eccentric eye expander
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- Commodity name: Slightly eccentric eye expander
Slightly eccentric reamer, which can be connected to the drill string to achieve while-drilling reaming. The tool has two sets of spiral reaming blades, the lower set is responsible for while-drilling reaming during drilling or positive reaming during tripping, and the upper set is responsible for reverse reaming during tripping. The main function of the tool is to reduce the severity of dog legs in directional wells, clear micro dog legs and small steps downhole, and expand the wellbore slightly larger than the theoretical diameter of the bit in expandable shale formations and creeping salt formations, soft mudstone formations, coal seams, etc., which can reduce the reaming time in conventional drilling and ensure the safe and smooth operation of tripping, logging, running casing, and running inflatable packers. In addition, the tool also has the function of clearing cuttings beds in directional wells and effectively controlling the ECD of horizontal wells and large deviation wells.
A slightly eccentric reamer that can be connected to a drill string for while-drilling reaming. The tool has two sets of helical reaming blades, an upper and a lower set. The lower set is responsible for while-drilling reaming during drilling or positive reaming during downhole operations, while the upper set is responsible for reverse reaming during tripping. The main function of the tool is to reduce dog leg severity in directional wells, clear minor dog legs and small steps downhole, and enlarge the wellbore slightly larger than the theoretical diameter of the bit in expandable shale formations and formations with creep properties such as salt, soft mudstone, and coal seams. This reduces the time required for reaming operations in conventional drilling and ensures safe and smooth operations such as tripping, logging, running casing, and running inflatable packers. In addition, the tool can also clear cuttings beds in directional wells and effectively control ECD in horizontal and large-displacement wells.
Features:
1. Single component, no moving parts, strength higher than the drill string it is connected to;
2. Connected to a single drill string stand, does not affect stand placement and second-tier operations for most rigs;
3. Hydraulic and mechanical dual action to break up and clear cuttings beds;
4. Dual-center design allows for reaming a wellbore larger than the tool's passing diameter;
5. Helical blades help improve the stability of the drill string during operation;
6. Upper and lower cutting structures allow for positive or reverse reaming;
7. Can be used for wellbore cleanup before logging, running casing, running inflatable packers, etc.;
8. Minimizes or eliminates minor dog legs;
9. Reduces reaming time and the number of well cleanups.
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