BQ Water Swivel Crossover Sub Alloy Steel Drilling Reducing Adapter

BQ Adapter Sub faucet size-changing connector (also known as faucet adapter or conversion connector) is a specialized transitional connection accessory for wireline coring drilling. It is mainly used for changing the thread size between the drilling rig faucet and different specifications of drill pipes, active drill pipes, and water connectors. It solves the problem of incompatible threads between the conventional faucet thread and the BQ small-diameter drilling tools, preventing direct connection failure. It enables multi-purpose use and universal switching of various drilling tools, making it a frequently necessary connection accessory for small shallow-hole, tunnel drilling, and geological survey projects.
The entire product is precision-machined from high-strength alloy steel, with precise threads, tight sealing, strong pressure-bearing capacity, smooth water flow without throttling, and no leakage of high-pressure mud, water leakage, or pressure relief. It is suitable for both clean water and mud drilling processes. 
Product Function and Applicable Scenarios
- Specification Conversion: Convert the standard large-diameter faucet threads into BQ standard threads, which are suitable for BQ small-diameter drill pipes and BQ inner pipe assembly drilling operations.
- Equipment General Transformation: The conventional NQ/HQ drilling rigs' water faucets do not need to be replaced. By installing BQ reducer joints, they can directly be used for BQ small-diameter drilling, significantly improving equipment utilization rate.
- Water Flow Stabilization: With a reasonable diameter and no reduced diameter water blocking, it ensures stable pressure of the mud pump, and the effects of discharging waste materials at the bottom of the hole and cooling the drill bit are not affected.
- Working Condition Adaptation: Specifically designed for shallow-hole exploration, mountainous area surveying, tunnel advance drilling, underground tunnel sampling, and small-scale geological surveying projects.

- Up-down different diameters and different thread designs: The upper end is compatible with the common faucet thread type, while the lower end is a standard BQ drill pipe thread. There is a precise transition, tight connection, and smooth disassembly.
- Integrated forging and molding: Made of high-quality alloy structural steel through quenching and tempering treatment, it has high strength and good toughness, is resistant to high pressure, torsion, and is not prone to fracture or deformation.
- Precise CNC threading: The thread is full and precise, with a small fit gap, high coaxiality. It rotates at high speed without wobbling or uneven wear, eliminating thread sticking and leakage or pressure loss.
- Smooth inner diameter: The internal diameter is uniform without steps, facilitating the smooth flow of mud, without generating vortices, clogging, pressure loss, and ensuring efficient and stable drilling.
- Surface anti-rust and hardening treatment: Resistant to mud corrosion and outdoor damp environments, it is not prone to rust or thread loosening during repeated disassembly over a long period, and has a longer service life.

1. Multi-functional in one unit, saving equipment costs
No need to replace the dedicated BQ faucet. By simply installing this adapter, ordinary NQ/HQ drilling rigs can directly drill BQ small-diameter holes. One drilling rig is compatible with multiple specifications of drilling tools, significantly reducing equipment procurement costs.
2. High-pressure sealing without leakage, stable pressure drilling
The precise screw connection ensures uniform force distribution. Under high-pressure mud conditions, there is no water leakage or pressure relief, ensuring stable pump pressure, good cooling effect of the drill bit, and excellent hole bottom slag discharge performance. This avoids slow progress due to leakage and drill burn issues.
3. High coaxiality, stable rotation
The overall precision processing ensures high coaxiality. The drilling rotation is stable with little vibration, effectively protecting the main shaft of the faucet and the drill pipe screw, reducing the probability of internal faults.
4. Wear-resistant and durable, suitable for complex field conditions
The quenched alloy steel material is resistant to impact, torsion, and corrosion. It can adapt to long-term high-frequency disassembly and assembly in mountainous areas, mining areas, and humid field conditions. It is not prone to slipping, cracking, or breaking.
5. Easy disassembly and assembly, efficient construction
Simple structure, standard connection. Quick on-site installation, able to switch between different sizes of drilling modes at any time. No need for complex modifications, significantly improving construction efficiency on the construction site.