CGE WUXI HW Geological Drilling Casing Pipe

CGE WUXI HW casing is a DCDMA standard W-series flush joint casing, engineered for HQ wireline coring and deep complex formation wall protection. As a heavy-duty, medium-large diameter casing, it delivers unmatched durability, high torque resistance, and seamless compatibility for mineral exploration, geotechnical drilling, water well, and foundation projects. It can be run once or permanently left in the hole for long-term borehole stability.

Certificates: RoHS, MSDS, ISO (available upon purchase)

Material: 4130 steel

Custom lengths: 0.6m, 1.5m, 3m

MOQ: 1 piece 

1.Flush Joint (Coupling-Free) Design – No Coupling, Higher Strength

Male/female direct connection with inner/outer shoulder fit, 2x contact area vs. conventional coupled casings.

Superior torque & collapse resistance, eliminates thread climbing under heavy torque; reduces stuck pipe and borehole wall scraping.

Smooth OD for easy running/pulling, ideal for deep & deviated holes.

2. Heavy-Wall Parallel Body – Precision & HQ System Compatibility

Uniform wall thickness (6.35mm), excellent concentricity & straightness.

Full compatibility with HQ wireline coring system, allows smooth passage of HQ inner tube assemblies.

Minimizes borehole deviation & tool wear, extends service life.

3. High-Strength 4 TPI Threads – Hardened & Wear-Resistant

DCDMA standard 4 TPI straight threads with surface heat treatment (50–55 HRC).

High pullout & shear resistance under impact/vibration; prevents galling, seizing & wear.

Repeated make-and-break reliability, reduces downtime & replacement costs.

4. Full-Body Quenching & Tempering – Ultimate Toughness for Deep Holes

Made of premium 4130 alloy steel (R780 grade) with full-body heat treatment.

High strength + high toughness, resists deformation & cracking in hard rock, deep drilling conditions.

Long service life (up to 3000m), cuts operational costs.

Mineral Exploration & Core Drilling, Geotechnical & Geological Investigations, Water Well Drilling & Groundwater Projects, Foundation & Civil Engineering, Deep Hole & Hard Rock Drilling holes, water wells and pile foundation holes.

Why Choose HW Casing?

Heavy-Duty Performance: Built for deep, hard, unstable formations; prevents borehole collapse.

100% HQ System Compatibility: Seamless fit with HQ wireline tools, no tool jamming.

Cost-Effective: Long life + low maintenance; reduces downtime & replacement frequency.

Global Standard: DCDMA compliant, interchangeable with BW/NW/PW casings for staged drilling.

Flexible Use: Single-run or permanent installation; ideal for surface/intermediate casing.

Q1: How to solve frequent borehole collapse and slurry leakage in fractured formations, loose rock layers and aquifers during deep hole drilling?
A: HW casing is a heavy-wall and high-rigidity drilling pipe. It effectively supports unstable complex formations, prevents borehole wall collapse, and isolates water leakage layers. It perfectly solves common drilling problems such as slurry loss and poor water return, ensuring stable borehole forming in high-risk formations.

Q2: Ordinary casing is easily squeezed and deformed under high formation pressure in deep drilling. How to avoid casing deformation?
A: Made of premium 4130 alloy steel with full-body quenching and tempering treatment, HW casing features ultra-high collapse resistance and compression resistance. It withstands strong formation extrusion force and structural pressure, avoiding pipe deformation and damage in deep, high-pressure drilling conditions.

Q3: Traditional coupled casing causes high running resistance, borehole scraping and stuck pipe issues. How to improve drilling efficiency?
A: HW casing adopts a flush joint, coupling-free design with uniform outer diameter. It greatly reduces running and pulling resistance, eliminates coupling sticking and borehole wall scraping, and ensures smooth operation in deep holes and deviated holes.

Q4: Ordinary casing threads easily slip, climb or break under high torque drilling conditions.
A: Equipped with standard 4 TPI high-strength threads and precise inner & outer shoulder fitting structure, HW casing provides excellent torque resistance, tensile resistance and shear resistance. It effectively prevents thread loosening, slipping and breaking under heavy-load high-torque working conditions.
Q5: Repeated make-and-break causes thread galling, seizing and severe wear, shortening casing service life.
A: The threads adopt professional surface heat treatment with high hardness and wear resistance. They resist galling and seizing after repeated assembly and disassembly, reducing tool loss and drilling downtime caused by thread failure.