Clean-up BHAs are built in the Port Harcourt shop and run as a string: scraper and brush, junk catcher, magnet, circulation tool, vacuum tool when the well needs reverse-circulation pickup.
Vacuum
Elevateur VX and 9-5/8" Elevateur
Both tools pick up debris by negative-pressure reverse circulation. Pumping through the vortex creates a low-pressure zone that draws cuttings, scale, and junk into a screened collection chamber instead of leaving them in the wellbore or on top of a plug or formation-isolation valve.
VX (3.625" tool OD) — borehole range 4-1/2" to 9-5/8". Optimal 4.5–5 bbl/min. 15 collection-chamber joints. Top connection 2-3/8" API Regular. Max make-up 1,800 ft-lb. Tensile yield 180,000 lb.
9-5/8" Elevateur — same reverse-circulation principle with a 65 ft filter-screen chamber for larger casing cleanouts. 4-1/2 IF box × pin, max OD 8.00", min ID 2.80", 5,000 psi test.
Non-rotating casing scraper
Removes residual cement, mud and tie-in burrs, perforation debris, rust, scale, and hard paraffin. Non-rotating mode protects casing; a shear ring converts the tool to rotating mode when needed. Blades hold 360° contact with the casing ID.
- 9-5/8" · 4-1/2" IF · tool OD 7.56" · ID 2.24" · 5.9 ft
- 7" · 3-1/2" IF · tool OD 4.76" · ID 1.77" · 5.8 ft
Non-rotating casing brush
Runs with the scraper. Dual brush bodies clean the scraped wall. 360° coverage, self-centering, non-rotating stabilizers. Flexible brushes that help a later chemical soak.
- 4-1/2" IF · brush OD 9.13" · tool OD 8.26" · 7.14 ft
- 3-1/2" IF · brush OD 6.38–6.92" · tool OD 5.43–6.06" · 6.92 ft
Wiper junk catcher
Spaced above scraper and brush. Running in, fluid bypasses and the wiper dresses the wall. Pulling out, flow is forced through the screen so junk does not ride back to surface uncaptured.
Example 9-5/8" Observateur: 4-1/2 IF box × pin, body OD 8.19", rubber OD 8.79", min ID 2.79", length 158.52".
String magnet
Recovers ferrous swarf that circulation will not lift. The magnet section can stay non-rotating while the string turns, which protects casing and keeps cuttings on the tool.
Multi-function circulation tool
Opens a high-rate side port for hole cleaning, workover, or completion circulation. Clear open/close status. Ball-drop or cable-compatible catcher. Built for HTHP and H2S mud systems.
BOP jetting sub
Bullnose jetting for risers, BOPs, and wellheads. Replaceable nozzles or blanks so the jet pattern matches the job.