Downhole Tools
Technical Specifications — Downhole Tools Complete Reference
Drill Bits — Size and IADC Coverage
Kingdream offers a complete range of API‑certified drill bits covering all IADC codes from 111 through 777, with diameters from 3 3/4″ to 26″. The company’s mining tricone bits also successfully passed ISO 9001 quality management system certification, aligning with international advanced quality management standards.
| Bit Type | Diameter Range | IADC Code Range | Material / Key Features |
|---|---|---|---|
| Steel tooth (milled tooth) tricone bits | 3 3/4″ – 26″ | 111 – 347 | High‑manganese steel with tungsten carbide hardfacing; lower cost, soft‑medium formations |
| TCI (tungsten carbide insert) tricone bits | 3 3/4″ – 26″ | 417 – 777 | Premium tungsten carbide inserts; sealed journal bearing (rubber O‑ring) or metal face seal |
| PDC bits — steel body | 3 3/4″ – 17 1/2″ | All codes | Forged premium alloy steel; good toughness; lower cost |
| PDC bits — matrix body | 3 3/4″ – 17 1/2″ | All codes | Tungsten carbide matrix; superior erosion and abrasion resistance |
| Diamond bits | 3 3/4″ – 26″ | — | Impregnated diamond, surface‑set, four‑blade KSF fast drilling diamond |
| Hybrid bits | 3 3/4″ – 26″ | — | PDC + TCI combined cutting structure |
IADC Code Quick Reference — Tricone Bits
| First Digit | Cutting Structure | Second Digit | Formation Hardness | Third Digit | Bearing/Seal Design |
|---|---|---|---|---|---|
| 1–3 | Steel tooth | 1 | Very soft | 1 | Open roller/ball bearing |
| 4–8 | TCI | 2 | Soft | 2 | Open bearing (air) |
| — | — | 3 | Medium‑soft | 3 | Open bearing, gage protection |
| — | — | 4 | Medium | 4 | Sealed roller bearing |
| — | — | 5 | Medium‑hard | 5 | Sealed journal bearing |
| — | — | 6 | Hard | 6 | Metal face seal bearing |
| — | — | 7 | Very hard | 7 | Metal face seal + gage protection |
| — | — | 8 | Extremely hard | — | — |
Recommended Operating Parameters — By IADC Code
| IADC Code Range | Recommended WOB (kN/mm of bit diameter) | Recommended Rotary Speed (RPM) | Typical Formation |
|---|---|---|---|
| 111–117 | 0.3–0.75 | 200–80 | Very soft, low compressive strength |
| 211–247 | 0.5–1.0 | 180–70 | Soft to medium |
| 417–447 | 0.75–1.1 | 160–60 | Very soft to soft (TCI) |
| 517–547 | 1.0–1.5 | 120–40 | Soft to medium (TCI) |
| 617–647 | 1.3–1.8 | 90–35 | Medium to hard (TCI) |
| 737–777 | 1.5–2.0 | 70–25 | Hard to extremely hard (TCI) |
KD Force Downhole Motor Specifications
| Parameter | Specification |
|---|---|
| Diameter range | 3 1/2″ – 9 1/2″ |
| Rotor material | High‑quality alloy steel |
| Stator material | Rubber with high force and tearing strength |
| Operating temperature (standard) | ~120 ℃ (250 °F) |
| Operating temperature (high‑temp) | ~180 ℃ (355 °F) |
| Torque output | Super‑large torque output (exceeds comparable foreign motors) |
| Stress distribution | Uniform — reduces stress concentration and fatigue failure risk |
| Oil‑mud compatibility | Suitable for high‑oil‑mud conditions |
Drill Collar Specifications
| Collar Type | Diameter Range | Material | Key Feature |
|---|---|---|---|
| Slick drill collar | 3 1/8″ – 10″ | AISI 4145H modified alloy steel | BHA stiffness and weight for WOB transfer |
| Spiral drill collar | 3 1/8″ – 10″ | AISI 4145H modified alloy steel | Reduces differential sticking risk |
| Non‑magnetic drill collar | 3 1/8″ – 10″ | Non‑magnetic alloy steel | MWD‑compatible; directional survey ready |
Product Types — Complete Downhole Tool Portfolio
Kingdream's product portfolio is organised into four integrated categories:
Type 1: Drill Bits (Full API Spec 7‑2 Line)
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Steel tooth tricone bits (IADC 111–347): Soft to medium formations, lower cost, excellent for top‑hole sections
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TCI tricone bits (IADC 417–777): Tungsten carbide insert bits for medium‑hard to extremely hard, abrasive formations
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PDC bits (steel body and matrix body): 3 3/4″ to 17 1/2″, 13 mm to 25 mm cutters, 5 to 9 blades
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Diamond bits: Four‑blade KSF fast drilling pioneer diamond bit; impregnated diamond; surface‑set natural diamond
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Hybrid bits: PDC + TCI combined cutting structure for complex interlayered formations
Type 2: Downhole Motors and Drilling Tools
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KD Force ultra‑high‑torque downhole motors: Super‑large torque output, uniform stress distribution
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KD Force equal‑stress downhole motors: High temperature (180 °C) and high‑oil‑mud compatible
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Torque impactors: Reduces stick‑slip and torsional vibration; protects BHA and drill bit
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PDM tools: Rotor manufactured from high‑quality alloy steel; rubber stator with high force and tearing strength
Type 3: BHA Components and Accessories
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Drill collars: Slick, spiral, non‑magnetic (AISI 4145H modified alloy steel, full‑length heat‑treated)
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Stabilisers: Integral blade and sleeve stabilisers
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Rotary subs: Lift subs, crossover subs, kelly saver subs
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Drill pipe accessories
Type 4: Integrated Downhole Tool Strings
Complete BHA packages including bit selection, motor sizing, stabiliser placement, and accessory specification — engineered as a single integrated system with a single point of technical support
Field Performance — Proven in the World's Most Demanding Wells
Tarim Basin — 5,818 m "One Trip Drilling” National Record
In late May 2024, using a combination of a Kingdream customized 9 1/2‑inch four‑blade KSF fast drilling pioneer diamond drill bit and a 197 mm high‑torque equal‑stress downhole motor, the crew in the northern Tarim block finished drilling the second section of the Repu 901H well in an integrated manner. The "one trip drilling” footage reached 5,818 m — setting a record for the longest "one trip drilling” footage in the country.
Since the introduction of the four‑blade KSF pioneer diamond bit paired with the high‑torque equal‑stress downhole motor in the Tarim Basin, Kingdream has successfully shattered over 30 performance records.
Kuwait — 20%+ ROP Improvement
Kingdream entered a long‑term drill bit service contract with Kuwait Oil Company (KOC) in 2022. After two years, the company's large‑size hybrid bits, shaped‑cutter PDC bits and RSS PDC bits have been widely applied in Kuwait. Through continuous product iteration in each oilfield block, the average rate of penetration has been improved by more than 20%.
Algeria — Breaking Complex Strata Bottlenecks
Full‑size drill bits from Kingdream have effectively broken through the technical bottlenecks of complex strata in Algeria, contributing to oil and gas development in one of the world’s most challenging geological basins.
North America — Exported for Over a Decade
Kingdream downhole tools have been exported to North America as part of Sinopec's core product offering — proven in some of the industry’s most competitive drilling markets.
[Product images: Kingdream downhole tools in operation — Tarim Basin ultra‑deep well site]
Applications — Where Kingdream Downhole Tools Excel
| Application | Formation Characteristics | Recommended Tools | Key Advantage |
|---|---|---|---|
| Conventional vertical wells (land) | Soft to medium shale, sandstone, limestone | Steel tooth tricone or PDC (steel body) + standard BHA | Cost‑effective, high ROP |
| Deep wells (5,000–7,000 m) | Hard, compacted, abrasive | TCI tricone (IADC 5xx‑6xx) or matrix body PDC | Extended bit life, gage retention |
| Ultra‑deep wells (>7,000 m) | Extremely hard, high confining stress, ultra‑high temperature | Diamond bit + KD Force motor + non‑magnetic collars | 5,818 m "one trip drilling” national record |
| Horizontal / directional wells | Variable hardness, interbedded | Shaped‑cutter PDC or RSS PDC bit + KD Force motor + stabilisers | Consistent build‑up, reduced steering adjustments |
| Complex interlayered formations | Alternating soft/hard beds, hard plastic | Three‑stage hybrid bit + torque impactor | Superior formation biting — solves conventional bit limitations |
| Middle East carbonate reservoirs | Hard, fractured carbonates | Large‑size hybrid bits, shaped‑cutter PDC, RSS PDC | 20%+ ROP improvement — proven in Kuwait |
| Algeria complex strata | High geological complexity, technical bottlenecks | Kingdream full‑size drill bits + integrated tools | Breaking through complex strata constraints |
| Unconventional shale gas wells | Shale with chert lenses, interbedded layers | High blade count PDC + KD Force motor + stabilisers | Vibration mitigation, consistent ROP |
| Offshore platform drilling | Variable, interbedded, marine corrosion risk | Matrix body PDC + corrosion‑protected BHA | Long runs, reduced trips |
Why Choose Kingdream for Your Downhole Tools
1. Global Tier‑1 Manufacturer — Listed Among Industry Leaders
Kingdream is recognised as a major global manufacturer of downhole drilling tools alongside Baker Hughes, Schlumberger, Halliburton, National Oilwell Varco, and Varel International. The company is described as "domestically leading, Asia’s largest, world‑advanced” in petroleum drill bit and tool R&D and manufacturing.
2. 40+ Years of Dedicated Downhole Tool Manufacturing
Founded in 1973, Kingdream has been dedicated to drill bits and tools for over 40 years in the oil and gas industry. This cumulative expertise spans multiple global geological basins.
3. Complete Downhole Tool Strings — One Supplier, One Warranty
Unlike most downhole tool manufacturers that specialise in only one product line, Kingdream produces complete sets of down‑hole tool strings — from drill bits to downhole motors to stabilisers and drill collars — all under one roof.
4. National Manufacturing Champion — Industry‑Highest Recognition
Kingdream has been honoured as a National Manufacturing Single Item Champion Demonstration Enterprise for its roller cone bits — the highest recognition for Chinese manufacturing in the drill bit sector. The KINGDREAM trademark is recognised as a well‑known trademark in China.
5. 5,818 m "One Trip Drilling” National Record
The 5,818 m record in the Tarim Basin — using a Kingdream diamond bit paired with a KD Force downhole motor — is a verified national record that validates the company's integrated approach. Since the introduction of this solution, Kingdream has shattered over 30 performance records.
6. API Spec 7‑2 and ISO 9001 Certified Across All Tools
All Kingdream downhole tools comply with API Spec 7‑2 (rotary shouldered connections) and API Spec 7‑1 (rotary drill stem elements). The company holds API monogram licences for roller cone bits and diamond bits.
7. "Four‑Ultra” Technology System — Backbone of Innovation
The core "Four‑Ultra” technology system — ultra‑high pressure structure, ultra‑hard materials, ultra‑high control ability, and ultra‑high precision manufacturing ability — provides the technological backbone for continuous innovation in downhole tools.
8. Vertically Integrated Manufacturing — 17 Production Lines
Sinopec Oilfield Equipment Corporation operates 17 production lines, an 8,000 hp pump test centre and seven professional laboratories — ensuring consistent quality and complete traceability for every certified component.
9. Global Reach — 40+ Countries, All Major Continents
Kingdream has exported downhole tools to more than 40 countries and regions across North America, South America, Russia, the Middle East and Africa.
10. Integrated Service Chain — On‑Site Technical Support
Sales personnel and technical service personnel work together on drilling sites, conducting joint tests and product selection with customers. Kingdream has established a service chain for all drilling processes and carries out effective services.
Frequently Asked Questions (FAQ)
Q1: What downhole tools does Kingdream manufacture?
Kingdream manufactures a complete range: tricone bits (steel tooth and TCI), PDC bits (steel body and matrix body), diamond bits, hybrid bits, KD Force downhole motors, torque impactors, drill collars (slick, spiral, non‑magnetic), stabilisers (integral blade, sleeve), rotary subs (lift, crossover, kelly saver), and complete BHA packages. The company can produce complete sets of down‑hole tool strings.
Q2: What size range do Kingdream downhole tools cover?
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Tricone bits: 3 3/4″ to 26″
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PDC bits: 3 3/4″ to 17 1/2″
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Diamond bits: 3 3/4″ to 26″
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Downhole motors: 3 1/2″ to 9 1/2″
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Drill collars: 3 1/8″ to 10″
Q3: What API certifications does Kingdream hold?
Kingdream holds API Spec 7‑2 (rotary shouldered connections) and API Spec 7‑1 (rotary drill stem elements) certifications, ISO 9001 quality management system certification, HSE system certification, and CNAS national laboratory accreditation. The company holds API monogram licences for roller cone bits and diamond bits.
Q4: What is the IADC code, and why does it matter?
The IADC (International Association of Drilling Contractors) code is the global classification standard for roller cone bits. The three digits tell you: first digit (1‑8) = cutting structure/formation series (1‑3 steel tooth; 4‑8 TCI); second digit (1‑8) = formation hardness; third digit (1‑7) = bearing/seal/gage protection design. The IADC code is the fastest way to match the right bit to your formation.
Q5: What is the difference between steel tooth and TCI tricone bits?
Steel tooth bits have cutting elements machined directly into the steel cones, hardfaced with tungsten carbide. They are lower‑cost bits for soft to medium formations (IADC 111–347). TCI (tungsten carbide insert) bits have pressed‑to‑shape tungsten carbide inserts installed into the cones. TCI bits are much more durable and used in medium‑hard to extremely hard, abrasive formations (IADC 417–777).
Q6: What is the KD Force downhole motor?
The KD Force downhole motor features super‑large torque output and uniform stress distribution, handling complex formations with ease while effectively reducing the risk of stress concentration and fatigue failure. According to industry data, advanced downhole motors can increase drilling speed by up to 20%.
Q7: What is the operating temperature rating for Kingdream downhole motors?
Standard Kingdream downhole motors are rated for approximately 120 ℃ (250 °F) . For high‑temperature and ultra‑deep well applications, Kingdream offers motors with high‑temperature elastomers rated for continuous operation up to 180 ℃ (355 °F) — validated in high‑oil‑mud conditions.
Q8: What is the advantage of the integrated downhole tool string approach?
When bits, downhole motors and accessories are sourced from different manufacturers, compatibility issues, interface mismatches and finger‑pointing can arise. Kingdream's integrated model means one engineering team designs all components together, one quality system tests the complete string, and one service team supports the entire BHA. This approach achieved the 5,818 m "one trip drilling” national record and is available for your wells.
Q9: What is the typical lead time for Kingdream downhole tools?
For standard tools — common sizes and IADC codes — typical lead time is 4–6 weeks from order confirmation to shipment. Custom tool strings and integrated BHA packages require 6–8 weeks depending on specifications.
Q10: What is the global downhole tools market outlook?
The global downhole drilling tools market size will reach 9,267.81 Million USD in 2025 and is projected to reach 11,609.04 Million USD by 2032, with a CAGR of 3.27% (2025‑2032). The major global manufacturers include Baker Hughes, Schlumberger, Halliburton, National Oilwell Varco, Varel International, Kingdream, Baoshi Machinery, and Jiangxi Feilong Rock Bit Manufacture.
Q11: Does Kingdream provide on‑site technical support?
Yes. Kingdream has established a service chain for all drilling processes. Sales personnel and technical service personnel work together on drilling sites, conducting joint tests and product selection with customers. Technology isn't just shipped — it’s applied at the wellsite.
Q12: What is the difference between steel body and matrix body PDC bits?
Steel body PDC bits are machined from high‑strength alloy steel — excellent toughness, lower cost, suitable for softer formations. Matrix body PDC bits use a tungsten carbide matrix material cast around a steel core — superior erosion and abrasion resistance, ideal for hard, abrasive formations and high‑velocity drilling fluids.
