Multi-Size New Universal Loading Chamber for Horizontal & Upward Mine Exploration Drilling

New Universal Loading Chamber is the newly upgraded hydraulic wireline coring accessory developed by SINOMACH Group. It is universally compatible with all DCDMA standard BQ, NQ, HQ, PQ wireline drilling tools without separate models for each size.
Overshot can be lowered by gravity in vertical boreholes, while horizontal mine tunnels, upward inclined tunnel boreholes and multi-size alternating underground drilling cannot feed overshot by self-weight. This loading chamber delivers high-pressure flushing fluid to hydraulically push overshot down the drill string to retrieve core barrel. One unit fits all regular wireline sizes, greatly cutting site inventory cost, making it a universal core tool for tunnel, mine and geotechnical investigation projects.

1. Bottom Universal Taper Thread Base
Matched interchangeable adapters for BQ/NQ/HQ/PQ, one main housing works for all drill rod sizes. Anti-slip annular grooves on outer wall for easy assembly, compatible with all DCDMA standard wireline drill rods worldwide.
2. Integrated Stainless Steel High-Pressure Main Housing
One-piece forged 304 stainless steel body with mirror polishing for superior rust & corrosion resistance. Seamless pressure-resistant structure outperforms traditional black oxide carbon steel units, resisting mud and weak acid/alkaline underground fluid to double service life.
3. Quick-Connect Brass Water Inlet
Side brass quick coupling port for high-pressure mud hose, no PTFE tape required for connection, fast plug-and-play with zero leakage. Forged brass resists corrosion and high hydraulic pressure.
4. Top Adjustable Locking Sealing Assembly
Hex thread locking structure to precisely adjust sealing preload for different working pressures. Large central through hole enables smooth feeding & retrieval of overshot without jamming, integrating pressure relief and wire rope guiding protection.

1. One Unit Fits All Sizes, Reduce Inventory Cost
Match interchangeable adapters to support BQ, NQ, HQ, PQ all wireline drill rods. Contractors no longer need to stock separate loading chambers for each size, lowering capital occupation and storage space.
2. Stainless Steel Body, Long Service Life with Anti-Corrosion
Compared with traditional carbon steel models, 304 stainless steel housing withstands muddy, damp underground tunnel environment, free of rust and internal blockage, cutting frequent replacement cost.
3. Quick Brass Water Coupling, Time-Saving & Leak-Free
Side quick plug inlet eliminates tedious thread sealing work on site, fast hose connection without mud seepage under high pressure.
4. Upgraded Adjustable Sealing, Stable Operation in Wide Pressure Range
Tunable top locking seal fits working pressure from 0 to 8MPa. Self-compensating multi-layer composite packings reduce seal replacement frequency during long continuous drilling.
5. Universal for All Angled Borehole Construction
Hydraulic feeding design perfectly solves coring retrieval difficulty for underground mines, tunnel advance drilling, inclined geotechnical investigation where gravity overshot feeding is impossible, applicable for shallow to deep drilling.
6. New Upgraded SINOMACH SOE Quality
60+ years drilling tool manufacturing experience, optimized to fix common defects of old-style loading chambers such as rust, water leakage and single-size limitation. Full set of factory test reports provided, highly recognized by global overseas engineering contractors.

1. Installation: Select matched conversion adapter according to drill rod size and fasten to the bottom; connect mud pump high-pressure hose to side brass quick coupling.
2. Overshot Feeding Operation: Loosen top hex locking nut, insert matching overshot assembly, tighten sealing cap, start mud pump to hydraulically push overshot to borehole bottom and latch inner core barrel.
3. Overshot Retrieval: Shut down mud pump, slowly loosen top nut to release internal cavity pressure, pull wire rope to lift overshot out.
4. Daily Maintenance: Flush residual mud inside cavity with clean water after each shift and wipe stainless steel body dry; clear sediment on brass quick coupling regularly, replace universal seal kit when leakage occurs.