HQ Wireline Loading Chamber for Medium Deep Inclined & Horizontal Core Drilling

HQ Loading Chamber is a professional hydraulic wireline coring accessory manufactured by SINOMACH Group, fully compliant with international DCDMA standards, perfectly matched with complete HQ series drilling tools including wireline drill rods, water swivels and overshots.
Overshot can be lowered by gravity in vertical boreholes, while horizontal and upward inclined underground boreholes cannot feed overshot by self-weight. This loading chamber injects high-pressure drilling fluid to hydraulically push the overshot down the drill string to latch and retrieve core barrel. It is an essential tool for medium-deep underground mine exploration and tunnel advance geological coring.

1. Bottom Standard HQ Male Taper Thread
Strictly follows DCDMA HQ taper thread specification, directly connects to the top of HQ wireline drill rod. Knurled outer surface enables easy assembly and disassembly, universal interchangeable with all brands of HQ drilling tools.
2. Integrated Forged High-Pressure Main Housing
One-piece forged seamless pressure-resistant hollow body, with a hollow observation & pressure relief window in the middle for visual inspection of internal mud flow. Large lateral channel stably bears hydraulic thrust pressure.
3. Side Female Thread High-Pressure Water Inlet Port
Standard internal thread connector for mud pump high-pressure delivery hose, continuously conveying flushing fluid to generate downward thrust for overshot.
4. Top Locking & Sealing Assembly
* Anti-slip knurled locking knob: Rotates to compress internal sealing components, locking tightly to prevent mud leakage during continuous drilling.
* Forged brass guide nipple: Smooth brass contact surface drastically reduces abrasion on steel wire rope, anti-corrosion and avoids wire scratching.

1. Full Compatibility with Complete HQ Wireline Tool Series
Matches HQ wireline drill rods, HQ double-tube core barrels, HQ overshots and HQ water swivels perfectly, no modification required for existing drilling rig equipment.
2. One-Piece Forged Housing, Stable High-Pressure Sealing
Seamless integral forging eliminates leakage risk, rated working pressure ≤8MPa, max instantaneous peak pressure up to 10MPa. Multi-layer composite seals ensure zero mud seepage during long-hour continuous drilling.
3. Brass Wire Rope Protection, Lower Site Consumable Cost
Smooth brass top guide minimizes steel wire abrasion, extends service life of wire rope and overshot, reducing frequent replacement cost on construction site.
4. Solve Construction Pain Points of Horizontal & Upward Boreholes
Hydraulic feeding design overcomes the difficulty of gravity feeding overshot in underground mines and tunnel horizontal holes, greatly improving coring efficiency for medium-deep boreholes.
5. Visual Observation Window, Simple Maintenance & Repair
Middle hollow window allows direct inspection of internal fluid condition; modular split design enables separate replacement of oil seals and brass guide nipple, single operator can finish disassembly and maintenance quickly.
6. Reliable SINOMACH State-Owned Enterprise Quality
SINOMACH Group owns over 60 years of R&D and manufacturing experience in drilling tools, strict state-owned enterprise quality control. Factory NDT test reports and full set of qualification documents are available, trusted by global geological and tunnel engineering contractors.

1. Installation: Tighten the bottom HQ male taper thread onto drill rod top, connect mud pump high-pressure delivery hose to side inlet port.
2. Overshot Feeding Operation: Loosen top locking knob, insert HQ overshot assembly, tighten brass sealing nipple, start mud pump to hydraulically push overshot down to borehole bottom to catch inner core barrel.
3. Overshot Retrieval: Shut down mud pump, release internal cavity pressure via middle observation window, loosen top knob and pull wire rope to lift overshot out.
4. Daily Maintenance: Flush residual mud inside cavity with clean water after every shift, store in dry environment to prevent rust; regularly disassemble and replace aging oil seals, coat thread with special lubricating grease to avoid thread seizure.