Views: 237 Author: CORTECH Publish Time: 2026-10-08 Origin: Site
Content Menu
● Why Source Hydraulic Surface Core Drilling Rigs from China?
>> What the Latest Exploration Report Means for Buyers
● Selection Criteria: How This Manufacturer Shortlist Was Built
● Top 10 Hydraulic Surface Core Drill Manufacturers in China
>> 1. CORTECH Drilling Equipment Co., Ltd.
>> 2. H.H. Drill-Tech Drilling Machinery Co., Ltd.
>> 3. Jiangsu Sinocoredrill Exploration Equipment Co., Ltd.
>> 4. Wuxi Jinfan Drilling Equipment Co., Ltd.
>> 5. Zhengzhou Hanfa Prospecting Machinery Co., Ltd.
>> 6. Henan Rancheng Machinery Co., Ltd.
>> 7. Shandong Hengwang Group Co., Ltd.
>> 8. Shandong HUAYAO Engineering Machinery Co., Ltd.
>> 9. Henan Yugong Machinery Co., Ltd.
>> 10. Shandong Feiyang Machinery Group Co., Ltd.
● Manufacturer Comparison: Capacity, MOQ, and Certification
>> How to Verify Production Capacity
● Technical Buyer's Guide: Compare Operating Envelopes, Not Headline Numbers
>> Define the Correct Drilling Architecture
>> Specify the Rod System Behind the Depth Rating
>> Request Material and Process Evidence
>> Check Compliance for the Actual Destination
● Common Procurement Traps—and How to Avoid Them
>> Trap 1: Components Change After the Quotation
>> Trap 2: Cold Demonstrations Replace Meaningful Acceptance Testing
>> Trap 3: Certification Does Not Match the Contracting Factory
>> Trap 4: "Compatible" Tooling Has Uncontrolled Interfaces
>> The Less-Discussed Procurement Check: Maximum Torque and Maximum Speed
● Factory Verification, Trial Orders, and Logistics
>> Verify the Manufacturing Process
>> Use a Pilot Rig as the "Sample"
>> Plan Shipping Before Final Assembly
● Conclusion: Select a Long-Term Engineering Partner
● FAQ
>> 1. How can I check whether a manufacturer's ISO 9001 certificate is expired or suspended?
>> 2. Can two rigs with the same advertised drilling depth have different practical capacities?
>> 3. What should an EU buyer request for a rig ordered in late 2026?
>> 4. How can an OEM buyer control undocumented changes during repeat orders?
>> 5. How can I tell whether an attractive quotation offers better lifecycle value?
Choosing a hydraulic surface core drill manufacturer in China involves more than comparing drilling depth and quotation price. For professional procurement teams, the real challenge is identifying a supplier that can deliver repeatable performance, transparent specifications, compliant documentation, and dependable support throughout the rig's working life.
A useful supplier evaluation begins with four questions:
- Does the company manufacture the proposed rig, or mainly source it from another factory?
- Can its engineering team explain the operating limits behind the specifications?
- Can its quality-control records be traced to the machine being purchased?
- Can it support commissioning, replacement parts, and technical troubleshooting in the buyer's market?
This guide presents ten China-based manufacturers or manufacturing suppliers with publicly identifiable hydraulic core drilling equipment portfolios. It focuses on surface mineral exploration and geological coring, rather than concrete coring machines, oilfield drilling packages, or foundation piling equipment.
Editorial disclosure: This article is prepared for CORTECH. CORTECH appears first because its all-hydraulic diamond drilling portfolio directly matches the subject. The order is an editorial shortlist—not an independently audited ranking by market share, product quality, or annual production.
China offers buyers several distinct sourcing options: specialist diamond drilling rig manufacturers, established geological equipment producers, and diversified machinery companies supplying hydraulic coring equipment alongside other drilling products.
The reviewed suppliers illustrate a practical manufacturing concentration in Jiangsu, particularly Wuxi and Lianyungang, with additional manufacturers in Zhengzhou, Henan, and drilling equipment suppliers in Shandong. This geographic pattern gives buyers multiple factories to evaluate within regional sourcing trips; it should not be interpreted as proof that every company in a cluster has equivalent engineering capability.
China's broader export infrastructure is also substantial. An official briefing reported 2025 exports of RMB 26.99 trillion, up 6.1% year over year. These figures describe all Chinese exports, however, not hydraulic surface core drilling rigs specifically. Buyers should avoid using broad machinery or national export statistics as evidence of an individual manufacturer's reliability.
S&P Global's World Exploration Trends 2026 reports that global nonferrous mineral exploration spending totaled $12.40 billion in 2025, approximately 0.6% below the previous year. This is exploration budget data—not drilling rig market revenue or China's core rig export value.
For procurement teams, the useful implication is commercial rather than promotional: compare lifecycle cost, availability, and application fit instead of assuming that a larger advertised depth or lower purchase price automatically creates better value.
The shortlist uses publicly available company profiles, product pages, and identifiable supplier information. No factory visits, customer interviews, or independently witnessed drilling trials were conducted for this article.
Manufacturers were considered against five screening criteria:
1. Product relevance: identifiable hydraulic core drilling equipment suitable for surface exploration or geological investigation.
2. Engineering visibility: published equipment descriptions or technical specifications.
3. Manufacturing identity: an identifiable company rather than an unnamed reseller listing.
4. Procurement usefulness: enough information to establish a meaningful next-stage evaluation.
5. Verification transparency: clear separation between published claims and information still requiring confirmation.
A purchasing team should then apply a more demanding qualification process.
| Evaluation area | Evidence to request | What it helps establish |
|---|---|---|
| Factory identity | Business registration, manufacturing address, live factory walkthrough | Who designs, assembles, and tests the rig |
| Engineering capability | Hydraulic schematic, controlled drawings, revision records | Whether customization is technically managed |
| Material control | Material certificates, heat-treatment records, inspection reports | Whether critical components meet agreed specifications |
| Quality assurance | Serial-number-linked assembly and test records | Whether QC is traceable to the purchased machine |
| Production planning | Current work schedule, purchased-component status, FAT date | Whether the delivery commitment is realistic |
| Export compliance | Destination-specific declaration and supporting documentation | Whether the proposed configuration is suitable for the target market |
| After-sales support | Parts list, warranty terms, service responsibilities | Whether the supplier can support the installed fleet |
These are recommended qualification requirements, not capabilities independently verified for every company below.
CORTECH is a specialist manufacturer focused on the research, development, and manufacturing of all-hydraulic diamond drilling rigs. Its company profile reports more than 1,200 rigs supplied to over 55 countries and describes integrated OEM capabilities alongside engineering design services. These are manufacturer-published figures, not independently audited shipment totals.
- Established: 2005, according to the company's public profile.
- Core advantage: Direct alignment with all-hydraulic diamond core drilling applications.
- Main market coverage: International exploration markets; the company reports deliveries across more than 55 countries.
- Relevant surface products: COREMASTER1800X, COREMASTER1300L, and COREMASTER500L, identified as successors to earlier CSD models.
For smaller drilling contractors, specialist distributors, and emerging equipment brands, CORTECH is a relevant candidate where engineering-led customization matters more than purchasing an unchanged catalog model. Its public website describes tailored solutions and services extending from custom rig design to installation and technical support.
Its potential value proposition is therefore a combination of specialist product focus and OEM engineering support—not an unqualified claim that it is the cheapest supplier.
Procurement teams should establish customization boundaries early: chassis arrangement, operating controls, engine selection, hydraulic cooling, accessories, branding, and technical documentation. Ask CORTECH to assign a technical contact and agree on drawing approval and response procedures. Communication speed, minimum order requirements, and project-specific cost advantages should be demonstrated during quotation rather than assumed.
H.H. Drill-Tech specializes in the design and manufacture of geotechnical drilling equipment. Its website identifies the current company as established in 2015 through the transfer of assets, personnel, and business from the former Lianyungang Huanghai Machinery enterprise. It traces the predecessor's origins to a state-owned geological machinery factory established in 1970.
- Established: 2015 for the current entity; predecessor history dates to 1970.
- Core advantage: A documented geological equipment manufacturing lineage.
- Main markets: Geological and mineral exploration; the company publishes a HYDX-6 operating example in Mongolia.
- Relevant product: HYDX-6 full-hydraulic core drilling machine.
This distinction between company incorporation and predecessor history matters when checking contracts, certificates, and warranty obligations.
OEM/ODM scope was not established from the reviewed public material. Buyers should ask whether the company will support alternate power packages, site-specific configurations, private labeling, and engineering modifications—and which changes require formal design validation.
Sinocoredrill presents itself as a one-stop drilling equipment manufacturer supplying rigs, wireline core barrels, diamond bits, drill rods, and related tooling. Its website states that it has operated since 2006 and claims ISO 9001 and CE credentials. Certificate validity and model coverage still require documentary verification.
- Established: 2006, according to its website.
- Core advantage: Combined rig and tooling procurement.
- Main markets: Mineral exploration, geological engineering, and other drilling applications.
- Relevant surface products: CR-15 and CR-25 full-hydraulic surface core drilling rigs.
This supplier is particularly relevant when a buyer wants one commercial package covering the machine and the drilling string.
However, a complete package is useful only if interfaces are genuinely compatible. Ask for controlled specifications for rods, core barrels, overshots, adapters, and spare parts.
OEM/ODM depth should be confirmed directly. A broad catalog does not, by itself, prove the ability to redesign hydraulic circuits or transfer engineering rights to a private-label buyer.
Wuxi Jinfan states that it was founded in 2003 and manufactures geological core drilling rigs alongside anchoring, sonic, marine investigation, and other drilling equipment. Its YDX-1200 is described as a full-hydraulic power-head core rig for diamond drilling and related exploration work.
- Established: 2003.
- Core advantage: Experience across multiple geological and engineering drilling categories.
- Main markets: Domestic and overseas drilling applications; its supplier profile lists markets including the United States, Germany, and Canada.
- Relevant products: YDX-series hydraulic core drilling rigs.
Jinfan is worth evaluating where the procurement project overlaps mineral exploration and engineering investigation.
For OEM/ODM requests, ask the factory to distinguish standard options from engineering changes. A different engine, mast arrangement, or application package may require different validation work. The reviewed sources do not establish a comprehensive private-label or ODM program.
Hanfa's public profile dates the group's establishment to 1998 and describes research, manufacturing, and sales capabilities across geological exploration and water-well equipment. Its portfolio includes full-hydraulic core drilling equipment such as the HFDX-6+.
- Established: 1998, according to the group profile.
- Core advantage: A diversified drilling equipment portfolio.
- Main markets: Geological prospecting, mining, engineering investigation, water wells, and geothermal applications.
- Relevant products: HFDX-series hydraulic core drilling rigs.
Hanfa may suit buyers sourcing several types of drilling machinery through one commercial relationship.
The important qualification question is model-specific: which rig uses a hydraulic power-head architecture suitable for the intended wireline diamond drilling program?
OEM/ODM services, private labeling, and modification responsibilities should be specified in the quotation. Buyers should also check which group entity manufactures the rig and which entity signs the export contract.
Rancheng states that it was founded in 2010 in Zhengzhou and manufactures drilling rigs, mud pumps, air compressors, and drilling tools. Its product pages include RCJ-series hydraulic diamond wireline machines and RCDX-series surface core drilling rigs.
- Established: 2010.
- Core advantage: Publicly identifiable wireline core drilling models and supporting equipment.
- Main markets: Mineral exploration, geological investigation, and engineering drilling.
- Relevant products: RCJ1000C and other full-hydraulic core drilling configurations.
An important procurement observation is that the reviewed RCJ1000C page contains differing engine-power descriptions and several drilling-capacity figures. This is a reason to require a signed, revision-controlled specification—not evidence, by itself, of poor manufacturing quality.
Ask Rancheng to reconcile all technical data before ordering, including engine model, hydraulic pressure, rod system, and depth assumptions. OEM/ODM availability should be confirmed separately from standard configuration options.
Hengwang describes itself as an integrated machinery group covering R&D, manufacturing, sales, and after-sales service. Its drilling portfolio includes hydraulic core rigs, while another product page identifies a fully hydraulic lightweight core drilling rig.
- Established: Not confirmed in the reviewed sources.
- Core advantage: A broad machinery and drilling equipment portfolio.
- Main markets: International construction and drilling equipment customers.
- Relevant category: Fully hydraulic lightweight core drilling equipment.
Buyers must distinguish its fully hydraulic exploration equipment from smaller hydraulic-feed or spindle-type machines. The same supplier may sell equipment with substantially different drilling architectures.
For OEM/ODM evaluation, request a model-specific manufacturing walkthrough and confirm whether the proposed unit is produced directly, assembled within the group, or sourced through another facility.
HUAYAO's website states that the company was founded in 2015 and identifies drilling and mining machinery among its products. Its exploration drilling category describes a full-hydraulic core rig intended for core sampling and multi-angle drilling.
- Established: 2015, according to its website.
- Core advantage: An identifiable full-hydraulic exploration drilling category.
- Main markets: Exploration and engineering drilling applications; a regional sales breakdown was not verified.
- Relevant category: Full-hydraulic exploration core drilling rigs.
The next qualification stage should establish exact model identity, factory location, technical limits, and installed references.
OEM/ODM capability was not sufficiently documented in the reviewed material. Buyers should not infer deep customization support from general statements about adaptability.
Yugong publishes a full-hydraulic rope-coring rig range covering YG-400, YG-600, YG-800, and YG-1000 models. Its page provides machine weights, engine power, lifting-force figures, drilling angles, and nominal depths, and explicitly states that equipment can be customized.
- Established: 2005, according to a company profile.
- Core advantage: A published multi-model hydraulic coring range.
- Main markets: The drilling product page names countries including Mexico, Thailand, Vietnam, the Philippines, Malaysia, Australia, and the United States.
- Customization scope: Customer-specific equipment customization is stated, although engineering and private-label boundaries require confirmation.
When comparing these rigs, do not treat a model number or nominal depth as a guaranteed NQ or HQ capacity. Require the rod system, drilling angle, formation assumptions, and operating limits to be defined.
For private-label projects, separately confirm branding, manuals, parts identification, warranty administration, and responsibility for modifications.
Feiyang's public product category identifies full-hydraulic core drilling rigs for precision coring and operational stability. Its supplier profile describes drilling equipment for industrial and geological applications and reports exports to more than 50 countries. These export claims remain supplier-reported.
- Established: Not confirmed in the reviewed sources.
- Core advantage: An identifiable hydraulic core drilling product category.
- Main markets: International industrial and geological drilling customers.
- OEM/ODM scope: Not sufficiently verified in the reviewed public material.
Feiyang belongs in the initial screening stage rather than being treated as fully qualified from web information alone.
Before proceeding, establish the legal manufacturing entity, production address, model-specific performance data, and references for comparable drilling conditions.
Comparable annual rig production figures were not verified for these ten companies. Installed-base totals, factory floor area, and group revenue are not substitutes for annual surface core rig output.
Likewise, "one set" in a marketplace listing is not necessarily the MOQ for a customized OEM project.
| Manufacturer | Procurement focus | Annual surface core rig capacity | MOQ evidence | Certification evidence reviewed |
|---|---|---|---|---|
| CORTECH | Specialist all-hydraulic diamond rigs; engineering-led OEM | Not verified; reports 1,200+ cumulative rigs supplied | Confirm by configuration | Request current documents and model coverage |
| H.H. Drill-Tech | Geological drilling manufacturing lineage | Not verified | Confirm directly | Request current documents |
| Sinocoredrill | Rigs plus wireline tooling | Not verified | One-set/piece entries appear in supplier listings; reconfirm | Website claims ISO 9001 and CE |
| Wuxi Jinfan | YDX core rigs; broader engineering drilling | Not verified | A YDX listing states one set; reconfirm | Request current documents |
| Hanfa | Diversified drilling equipment | Not verified | Confirm directly | Historical ISO references appear in listings; current status unverified |
| Rancheng | RCJ/RCDX exploration rigs and supporting equipment | Not verified | Confirm directly | Request current documents |
| Hengwang | Broad machinery range; hydraulic coring options | Not verified | Confirm directly | Request model-specific documents |
| HUAYAO | Full-hydraulic exploration category | Not verified | Confirm directly | Request current documents |
| Yugong | YG-series hydraulic rope-coring rigs | Not verified | Confirm directly | Request current documents |
| Feiyang | Hydraulic exploration drilling category | Not verified | Confirm directly | Request current documents |
The specific published shipment, MOQ, and certification statements above come from company or supplier materials and should be verified before contract award. Blank or unverified certification information does not establish that a supplier lacks certification.
Instead of asking only, "How many rigs can you produce per year?", request:
- Completed deliveries for the relevant model family.
- Current assembly slots and component availability.
- Hydraulic testing capacity and inspection staffing.
- The planned date for factory acceptance testing.
- Evidence of previous delivery performance.
- A schedule showing engineering approval, purchasing, assembly, testing, and shipment.
These questions turn a promotional capacity claim into a project-specific delivery assessment.
"Hydraulic core drill" is not a sufficiently precise purchasing description. Suppliers may offer spindle-type rigs with hydraulic functions and fully hydraulic power-head wireline rigs within the same catalog. Sinocoredrill's published portfolio, for example, separates spindle-type models from full-hydraulic surface rigs.
Your RFQ should identify the required drilling method, wireline system, surface application, hole-angle range, and power-head arrangement.
A depth claim without a rod specification is incomplete.
Ask the manufacturer to state:
- Rod size and actual thread system.
- Rod mass per meter.
- Vertical or inclined drilling basis.
- Continuous pullback capability.
- Casing and tooling assumptions.
- Any limitations imposed by formation conditions.
Boart Longyear's rod information provides a concrete example of why this matters: its lighter W-Wall drill string can increase a drill's rated depth capacity without changing the drilling machine itself. Therefore, identical rig hardware can have different depth ratings with different rod configurations.
Do not assume that naming a steel grade proves component quality.
For critical rods, shafts, pins, and mast components, specify the required material properties and supporting records. Where a supplier proposes grades such as 42CrMo or an equivalent, require documented equivalence and agreed acceptance criteria rather than treating the grade name as a universal industry requirement.
The inspection package should address:
- Material traceability.
- Heat-treatment condition.
- Dimensional tolerances.
- Thread inspection and compatibility.
- Welding inspection requirements.
- Replacement-part interchangeability.
Heat treatment and thread design deserve particular attention in drilling tools; established rod manufacturers explicitly link these features to performance in demanding applications.
CE marking is not an environmental quality award, and ISO certification is not a substitute for machine conformity assessment.
For machinery placed on the EU market before 20 January 2027, the European Commission identifies the Machinery Directive 2006/42/EC as the applicable framework. The Machinery Regulation (EU) 2023/1230 becomes mandatory from that date. A late-2026 order therefore needs a compliance plan tied to the intended market-placement date, not merely the quotation date.
RoHS applicability also requires a scope assessment. EU guidance identifies exclusions that can include non-road mobile machinery made available exclusively for professional use. Do not demand or advertise a generic "RoHS-certified drilling rig" without establishing which requirements apply to the proposed configuration.
A quotation may identify a component brand without fixing the exact model or performance specification.
Prevention: Include a controlled bill of materials and require written approval for substitutions. Evaluate a proposed substitute against operating pressure, displacement, control characteristics, serviceability, and warranty—not brand familiarity alone.
A short no-load demonstration cannot establish performance under the buyer's drilling duty cycle.
Prevention: Agree on factory acceptance test conditions in advance, including warm-up, loading method, recorded temperatures, operating duration, and acceptance limits. Distinguish what the FAT proves from what requires a site drilling trial.
A certificate may show a related company, a different site, or a scope that does not cover the relevant manufacturing activity.
Prevention: Match the certificate's legal entity, address, scope, issuing body, and current status to the factory and contract. IAF CertSearch provides a mechanism for checking accredited management-system certificates.
A familiar size designation does not replace thread drawings and assembly testing. Established rod product lines use different thread forms and load-bearing designs, illustrating why detailed interface verification matters.
Prevention: Approve the exact tooling system and test the intended rods, adapters, core barrel, and overshot together.
A useful technical check is whether advertised maximum torque and maximum rotational speed are available simultaneously.
Hydraulic power-head specifications may describe different operating points. Rancheng's published description, for example, refers to mechanical gears combined with stepless speed regulation. A table of separate maxima does not establish the continuous torque available at the buyer's working speed.
Ask for a torque-speed operating map, continuous-duty limits, and performance at the planned drilling RPM. Apply the same scrutiny to winch ratings: request the conditions behind the stated pulling force.
This is a specification-validation method, not an allegation that every supplier overstates performance.
A factory visit should follow the proposed rig through material receiving, fabrication, machining, assembly, hydraulic installation, testing, and final inspection.
If a physical visit is impractical, request a live walkthrough tied to an actual production machine. Confirm where outsourced processes occur and who controls their inspection.
For a capital-equipment purchase, the practical sample is usually a pilot unit, not a small product sample.
Define the trial before payment:
1. Approve a controlled specification.
2. Conduct the agreed FAT.
3. Perform commissioning and operator training.
4. Record site performance under defined conditions.
5. Review faults, service response, and parts consumption.
6. Approve follow-on orders only after corrective actions are closed.
Core recovery and penetration rate should not be attributed to the rig alone. The trial must document geology, tooling, flushing, and operating practices so comparisons remain meaningful.
Confirm packed dimensions, lifting arrangements, center of gravity, accessory packing, corrosion protection, fluid-handling requirements, and destination unloading facilities.
For OEM orders, document spare-part numbers and manuals before shipment. A lower freight quotation has limited value if the buyer cannot safely unload or identify replacement components.
The right hydraulic surface core drill manufacturer is the one that can demonstrate application fit, traceable quality control, realistic delivery planning, and support for the proposed configuration.
CORTECH is a relevant first candidate for buyers seeking a specialist all-hydraulic diamond drilling manufacturer with published OEM capabilities and international deliveries. Its suitability for a particular project should still be established through technical review, a controlled quotation, and agreed acceptance testing.
For a project-specific proposal, submit your target depth, rod system, geology, hole angles, operating altitude and temperature, destination market, and customization requirements to CORTECH. Request an engineering-reviewed configuration, supporting compliance documentation, spare-parts package, and FAT plan—not only a headline price.
Search by company name or certificate details in IAF CertSearch, then compare the legal entity, address, standard, scope, and status with the supplier's documents. If information is missing or inconsistent, contact the issuing certification body. A failed database search alone should not be treated as definitive proof of invalid certification.
Yes. The drill string can materially change the depth rating. Boart Longyear documents how lighter rod configurations can increase rated depth capacity. Compare identical rod systems, hole angles, and operating assumptions before comparing rigs.
Require the supplier to explain whether its rating is nominal, calculated, or demonstrated—and under what conditions.
Request a compliance assessment linked to the date the machine will be placed on the EU market. The current Machinery Directive applies before 20 January 2027; the new Machinery Regulation applies mandatorily from that date. Obtain configuration-specific conformity documentation rather than relying on a generic certificate image.
Use a contractually controlled specification, bill of materials, approved drawings, and revision register. Require advance approval for changes to engines, hydraulic components, controls, mast construction, and safety functions.
Also define spare-part continuity, branding rights, manual ownership, warranty responsibility, and which engineering documents the buyer may retain. "OEM available" is not enough to establish these rights.
Compare the proposed configuration and support package on a common basis. Include landed cost, commissioning, training, initial spares, maintenance requirements, parts lead times, and warranty responsibilities.
Then identify what evidence supports each assumption. A cheap replacement part is not necessarily economical if delivery takes weeks; a higher-priced rig is not automatically more reliable. The purpose is to quantify the trade-off rather than substitute brand reputation for verification.
1. CORTECH Drilling Equipment Co., Ltd. — Company Profile
Supports the description of CORTECH’s all-hydraulic diamond drilling specialization, engineering and OEM capabilities, and manufacturer-reported international installed base. Shipment figures should be treated as company statements rather than independently audited totals. [cortechdrilling]
2. H.H. Drill-Tech Drilling Machinery Co., Ltd. — Corporate and Product Information
Supports the distinction between the current company’s establishment in 2015 and its predecessor’s manufacturing history, together with its geological drilling equipment focus and HYDX hydraulic core drilling products. [hh-jx]
3. Jiangsu Sinocoredrill Exploration Equipment Co., Ltd. — Company and Equipment Portfolio
Supports the company’s stated operating history, rig-and-tooling offering, and published ISO 9001 and CE claims. Buyers should independently verify certificate validity and the applicability of conformity documentation to the selected rig. [sinocoredrills]
4. Wuxi Jinfan Drilling Equipment Co., Ltd. — Company Profile and YDX Product Information
Supports the stated establishment year of 2003, its geological and engineering drilling portfolio, and the identification of YDX-series hydraulic core drilling equipment. [wuxijinfan]
5. Zhengzhou Hanfa Prospecting Machinery Co., Ltd. — Company Profile and HFDX-6+ Product Information
Supports the group’s stated establishment year, diversified drilling equipment portfolio, and full-hydraulic core drilling product offering. [hanfagroup]
6. Henan Rancheng Machinery Co., Ltd. — Corporate and Wireline Core Drilling Product Pages
Supports the company’s stated manufacturing background and the identification of RCJ-series hydraulic diamond wireline rigs. Published specifications should be reconciled in a signed technical schedule before purchase. [ranchengmachine]
7. Hengwang — Drilling Equipment Portfolio
Supports the identification of hydraulic core drilling equipment and a fully hydraulic lightweight core drilling category within its broader machinery range. [en.hengwang]
8. Shandong HUAYAO Engineering Machinery Co., Ltd. — Corporate and Exploration Drilling Information
Supports the website-stated establishment year of 2015 and the identification of a full-hydraulic exploration core drilling category. Model specifications and manufacturing identity require further buyer verification. [huayaodrillingmachinery]
9. Henan Yugong Machinery Co., Ltd. — Full Hydraulic Rope Coring Drilling Rig
Supports the identification of YG-series hydraulic coring rigs, published model specifications, and the company’s stated availability of equipment customization. [yugongmachinery]
10. Shandong Feiyang Machinery Group Co., Ltd. — Hydraulic Core Drilling Portfolio and Supplier Profile
Supports the identification of a full-hydraulic core drilling product category and supplier-reported international sales coverage. The establishment year, manufacturing arrangements, and OEM/ODM scope were not independently verified for this article. [feiyangdrilling]
