HTW 1m/ 1.5m/ 2m/ 3m Thin Wall Drill Rod Pipe

HTW is the large-size option of TW thin-wall wireline drill rod series, made to DCDMA standards and interchangeable with regular HQ heavy-wall drill rods as the primary tubing for large-bore medium-depth mineral exploration and major geotechnical projects; engineered for both lightweight build and high structural strength to match medium & large full-hydraulic crawler rigs, it is 13% lighter than standard HQ rods with expanded inner bore for improved mud circulation, manufactured from ZT950 high-strength alloy seamless steel via thin-wall body design plus upset-forged & fully heat-treated rod ends and case-hardened threads that deliver outstanding galling resistance, tight sealing and superior tensile & torsional capacity with internationally interchangeable threads for global replacement compatibility.

1、Wireline core retrieval without tripping full string: Core is fished by overshot via wireline, no need to pull out whole drill string, boosting drilling efficiency over 45%.

2、Lightweight to cut rig load & labor cost: 13% weight reduction vs HQ solid rod, lowering rig torque and field transportation cost in mountainous sites.

3、Large inner bore for fluent mud circulation: Big inner diameter ensures high mud flow rate, efficient cuttings removal and better bit cooling in hard & broken formations.

4、Stable borehole to avoid stuck pipe & hole collapse: Optimized annular clearance per DCDMA for good hole straightness; usable as temporary casing in fractured strata to save extra casing cost.

5、Full universal interchangeability: DCDMA certified, fully compatible with global mainstream HTW drill tools and hydraulic core drill rigs.

Large-scale metal mineral prospecting, coalfield deep exploration, highway & railway geotechnical investigation, water conservancy engineering drilling, geothermal well drilling, large-diameter horizontal underground coring, tailing deposit geological survey.

Q1: Conventional HQ solid drill rod is overweight, leading to high rig fuel cost and difficult hoisting & transportation in mountain areas?
A: Made of high-strength ZT950 seamless tube, around 13% lighter than standard HQ rod. It reduces rig torque and fuel consumption for easier field hoisting and transportation.

Q2: Traditional coring requires pulling out full drill string, causing long tripping time and low drilling efficiency?
A: Matched with complete HTW wireline core barrel and overshot assembly. Core can be retrieved by wireline without tripping out the entire drill string to save lots of non-drilling time.

Q3: Small inner bore of solid rods results in poor mud circulation, poor cuttings removal and frequent bit sticking in hard & broken rock?
A: Large internal diameter ensures high mud flow capacity, smooth cuttings discharge and effective bit cooling for stable drilling in complicated formations.

Q4: Deep boreholes tend to deviate severely; hole collapse in fractured ground requires expensive extra casing?
A: Manufactured per DCDMA standard with optimized annular clearance for excellent hole straightness. It can act as temporary casing in unstable strata to cut extra casing expense.

Q5: Small urgent orders are hard to place due to high MOQ, long lead time and incomplete certification documents?
A: MOQ is only 1 piece with fast stock delivery. ISO, MSDS, RoHS certificates and factory test reports can be supplied upon purchase.