CHIMERA Eco-Max
The Eco-Max? is a comprehensive solution to improve completion deployment in a cost driven market. The tool consists of a scraper, brush and high capacity magnet elements integrated onto a completion deployed mandrel. The Eco-Max? can be run as part of the permanent completion string and eliminates the need for a dedicated wellbore clean-up run.
- Single piece mandrel complete with connections becomes an integral component of the completion
- Scraper cage manufactured from single piece mandrel without the need for springs, bolts or pads
- All components can be supplied with compatible metallurgy
- Mandrel ID is matched to tubing ID to prevent restrictions
- Available with any tubing connection to run directly on the completion tubing
Each Eco-Max? includes a single piece caged scraper element with 360° overlapping blades which ensure 100% casing wall coverage. The scraper features self-cleaning teeth to remove cement, perforation burrs, scale and other potentially damaging debris from the casing.
Immediately behind the scraper are rows of brushes which scour corrosion pits and coupling recesses. The brush also acts as a barrier preventing debris from passing below the tool and interfering with the completion. The scraper and brush element complement each other and form a highly efficient dual cleaning mechanism.
Large bypass channels allow unhindered circulation rates to facilitate removal of debris. Rotation and reciprocation is possible but may be limited by the completion hardware. Magnets remove ferrous debris from the wellbore during cleaning. The magnets are arranged along ribs to maximize the exposure area available to trap debris while running out of hole.
The Eco-Max? can be run below the lowest packer and made up directly to the tubing string. While running in the hole it is possible to reciprocate the Eco-Max? across each subsequent packer setting depth. If circulation or rotation is possible this can be done to maximize the cleaning efficiency. The scraper will remove any cement while the brush scours stubborn debris as well as acting as a debris barrier. The magnets capture any metal debris to protect the completion
CHIMERA N-Gage
The N-GAGE??SWIVEL is a selectively engageable screen deployment swivel. It allows selective rotation of an upper drill string while allowing a screen assembly below to remain stationary. This simple yet highly effective technology assists in screen deployment in high angle wells by allowing the drill pipe to rotate without rotating the screen assembly. This reduces the friction of the drill pipe allowing additional string weight to be applied to push the screens to TD.
- Ceramic bearings allow extended rotation at high loads without the risk of damage to the bearing and will not become damaged by high compressive loads
- Robust spline mechanism disengages the lower string in compression and locks rotationally in tension
- Internal polymer bearings and rotating seals allow seamless rotation
- Available in API and Premium thread connections
- Full through bore for circulation
The N-GAGE? SWIVEL is typically run immediately above a Running Tool used to install a Lower Completion Packer or Liner Hanger. The most common application is to allow deployment of long screen sections in extended high-angle wells, although many other applications exist.
While running the Screen Lower Completion, as the Screens are run into the horizontal section, drag tends to increase. Screen completions typically cannot be rotated without damage. Drag will increase and the neutral point will move up the string. Ultimately drag will exceed the applied weight until the string cannot move further.
Once the N-GAGE? SWIVEL is in compression, the tool strokes closed and the engagement spline will release allowing rotation of the upper string. Rotating the upper string reduces axial drag and allows additional string weight to overcome the drag preventing the screens from being deployed.
The upper string can then be rotated into the hole, without fear of damage to the Lower Completion. Once at depth, the through bore allows balls or darts to be pumped to activate the Lower Completion Packer or Liner Hanger. Picking the tool into tension re-engages the splines and allows the Running Tool to be backed off by left or right hand rotation.
CHIMERA BOP Jetting SUB
The BOP Jetting SUB is a simple and robust BOP jetting device. It allows jetting of the BOP ram cavities, annular and wellhead to dislodge debris. It is available with variable external diameters to suit surface and subsea BOP stacks.
Debris can collect inside the BOP and wellhead area during drilling, due to the sudden drop in fluid annular velocity. This debris can then fall back into the
well, during completion deployment, preventing setting of packers or installation of the tubing hanger.
- Replaceable jetting nozzles
- Dart activated Shear-able Sleeve allows the jetting ports to be openedon demand
- Dart can be fished to re-establish flow below the tool if desired
- Available with various external diameters for various applications
- Available in API and Premium thread connections
- Full through bore for circulation
The BOP Jetting SUB can either be short tripped into the well or run as part of a comprehensive wellbore cleanup string. When required, the BOP Jetting SUB is positioned at the BOP or Wellhead depth. The Activation Dart is dropped into the string which lands on the Shear-able Sleeve.
Pressure is applied to shift the Shear-able Sleeve and allow circulation through the Jetting Nozzles. For surface BOP stacks, it is not always necessary to install the Shear-able sleeve, and it can be run in an open position and short tripped into the well.
To jet the BOP stack, it is typical to pump at 10 BPM while slowly rotating the string, making 3 passes across the BOP stack and wellhead. It is recommended to reduce the circulation rate to 5 BPM while jetting the annular to prevent damage. Functioning the annular or BOP rams (not shear rams) can help dislodge any debris.
It is recommended to run a junk catcher tool below to catch any dislodged debris that may fall down the well while jetting the BOP stack.
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