Downhole tool technology
Technical Specifications — Complete Reference
Tricone Bit Technology — IADC Code Coverage
The IADC code remains the global standard for roller cone bit classification. Kingdream offers complete coverage from 111 through 777:
| IADC Code Range | Cutting Structure | Formation Type | Recommended RPM | WOB (kN/mm) |
|---|---|---|---|---|
| 111–117 | Steel tooth | Very soft | 200–80 | 0.3–0.75 |
| 211–247 | Steel tooth | Soft to medium | 180–70 | 0.5–1.0 |
| 311–347 | Steel tooth | Medium to hard | 160–60 | 0.75–1.1 |
| 417–447 | TCI | Very soft to soft | 160–60 | 0.75–1.1 |
| 517–547 | TCI | Soft to medium | 120–40 | 1.0–1.5 |
| 617–647 | TCI | Medium to hard | 90–35 | 1.3–1.8 |
| 737–777 | TCI | Hard to extremely hard | 70–25 | 1.5–2.0 |
Steel Tooth (Milled Tooth) Tricone Bits
| Parameter | Specification |
|---|---|
| Bit diameter range | 3 3/4″ to 26″ |
| Material | High‑manganese steel with tungsten carbide hardfacing |
| Hardfacing application | On all surfaces of the cutting structure and shirttail tip |
| Common IADC codes | 111, 115, 116, 117, 126, 127, 131, 136, 137, 216, 217, 316, 317, 326, 327, 336, 337 |
TCI (Tungsten Carbide Insert) Tricone Bits
| Parameter | Specification |
|---|---|
| Bit diameter range | 3 3/4″ to 26″ |
| Insert material | Premium tungsten carbide (spherical, conical, chisel shapes) |
| Bearing options | Sealed journal bearing (rubber O‑ring) or metal face seal |
| Common IADC codes | 417, 437, 515, 517, 535, 537, 617, 637 |
PDC Bits — Steel Body & Matrix Body
| Parameter | Specification |
|---|---|
| Bit diameter range | 3 3/4″ – 17 1/2″ |
| Body type | Steel body (good toughness, lower cost) or matrix body (superior erosion/abrasion resistance) |
| Cutter diameter | 13 mm, 16 mm, 19 mm, 25 mm premium synthetic diamond compacts |
| Cutter shape | Planar and non‑planar (shaped‑cutter, multiple‑ridge) options |
| Blade count | 5 to 9 blades |
| Cutting structure | Force‑balanced, asymmetrical blade design, bit whirl prevented |
KD Force Downhole Motor Technology
| Parameter | Specification |
|---|---|
| Diameter range | 3 1/2″ – 9 1/2″ |
| Core configurations | KD Force motor profile, high‑hardness rubber, high‑strength high‑wear transmission system (8 total) |
| Torque output | Exceeds foreign equivalents; 2× conventional high‑torque motors |
| Stress distribution | Uniform — reduces stress concentration and fatigue failure |
| Operating temperature | ~120 ℃ standard; high‑temp up to 180 ℃ |
| Oil‑mud compatibility | Suitable for high‑oil‑mud conditions |
Torque Impactor Technology
| Parameter | Specification |
|---|---|
| Function | Reduces stick‑slip and torsional vibration |
| Integration | Placed between drill bit and downhole motor |
| Application | Interbedded formations, directional drilling, extended laterals |
Drill Collar Technology — Slick, Spiral & Non‑Magnetic
| Collar Type | Diameter Range | Material | Key Technology Feature |
|---|---|---|---|
| Slick drill collar | 3 1/8″ – 10″ | AISI 4145H modified alloy steel | Full‑length heat‑treated, Brinell 285–341 |
| Spiral drill collar | 3 1/8″ – 10″ | AISI 4145H modified alloy steel | Spiral grooves reduce differential sticking risk |
| Non‑magnetic drill collar | 3 1/8″ – 10″ | Non‑magnetic alloy steel | MWD‑compatible; directional survey ready |
Field Technology Validation — Records & Performance
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 this integrated solution 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 ROP has been improved by more than 20%. The technology promotion conference in Kuwait in October 2024 showcased Kingdream’s technical strength in ultra‑deep wells and shale gas wells, with innovative applications of hybrid bits in Kuwait's carbonate formations.
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.
Tarim Basin Ultra‑Deep Well — 10,000 m
The diamond bit technology that set the 5,818 m record is the same technology proven in China’s first 10,000‑m ultra‑deep well, Shendi Take 1, designed with a vertical well depth of 11,100 m. The diamond bit relies on circular superhard diamond composite sheets that drill through extremely hard rock layers using both "drilling force” and "grinding force” .
Why Choose Kingdream for Downhole Tool Technology
1. 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 company has also been recognised as a National "Little Giant” enterprise for specialisation and innovation — the highest level of SME recognition in China.
2. 40+ Years of Technology Development
Kingdream has been dedicated to drill bits and tools for over 40 years. The company has developed a strong foundation of proprietary intellectual property, with 140 domestic patents, 13 foreign patents and 123 proprietary technologies.
3. "Four‑Ultra” Technology System — The Backbone of Innovation
The core "Four‑Ultra” technology system provides the technological backbone for continuous innovation, ensuring consistent breakthrough performance in the world's most challenging drilling environments.
4. Integrated Design & Supply — One Supplier, One System
Kingdream’s R&D and marketing for different types of products are not divided or separated. The company continues to promote integrated design and supply of drill bits and drilling tools. From diamond bits to KD Force motors to torque impactors and BHA components — one manufacturer designs the complete system.
5. API Spec 7‑2 & ISO 9001 Certified
All Kingdream downhole tools comply with API Spec 7‑2 (rotary shouldered connections) and API Spec 7‑1 (rotary drill stem elements), with full third‑party inspection available through any accredited agency.
6. Field‑Proven Technology — 5,818 m National Record
The 5,818 m "one trip drilling” footage isn't a marketing claim — it’s a verified national record that validates the effectiveness of Kingdream's integrated approach. Since the introduction of this integrated solution, Kingdream has shattered over 30 performance records.
7. 20%+ ROP Improvement — Kuwait Oil Company
Two years of field iteration in Kuwait oilfields have validated Kingdream’s technology: average ROP improved by more than 20%.
8. Vertically Integrated Manufacturing — 17 Production Lines, 8,000 hp Test Center
Kingdream has 17 production lines across drill bits, drilling rigs, cementing equipment, fracturing units, steel pipe and hydrogen energy equipment, supported by an 8,000 hp pump test center and seven professional laboratories — ensuring consistent quality and complete traceability.
9. Intellectual Property Leadership
Kingdream has constructed a national rock‑breaking R&D centre and laboratory, with a large team of experts in roller cone bits, diamond bits, screw motors and other petroleum machinery. The company has established a technological innovation system with independent intellectual property rights.
10. Integrated Service Chain — On‑Site Technical Support
Kingdream has established a service chain for all drilling processes, with sales personnel and technical service personnel working together on drilling sites, conducting joint tests and product selection with the customers.
Frequently Asked Questions (FAQ)
Q1: What is the "Four‑Ultra” technology system?
The "Four‑Ultra” technology system is Kingdream’s core technological foundation: ultra‑high pressure structure, ultra‑hard materials, ultra‑high control ability, and ultra‑high precision manufacturing ability. These four pillars enable Kingdream to produce integrated downhole tool strings that deliver breakthrough performance.
Q2: What is the advantage of the three‑stage cutting hybrid bit?
Conventional hybrid bits offer two‑stage cutting. Kingdream's patented three‑stage cutting hybrid bit adds a third stage — with the cone cutting inserts cutting higher than the fixed cutting inserts, forming an additional crushing stage. According to the patent, this design effectively improves the mechanical drilling rate for hard plastic strata, maintains or prolongs service life, and further expands stratum adaptability.
Q3: What makes the KD Force downhole motor different from conventional motors?
The KD Force motor integrates eight core configurations and delivers output torque exceeding comparable foreign downhole motors — more than twice that of conventional high‑torque constant‑wall‑thickness motors. It features super‑large torque output and uniform stress distribution, reducing the risk of stress concentration and fatigue failure.
Q4: What is the significance of Kingdream's 5,818 m "one trip drilling” record?
The 5,818 m record was achieved using a Kingdream customized 9 1/2‑inch four‑blade KSF fast drilling pioneer diamond drill bit combined with a 197 mm high‑torque equal‑stress downhole motor. This national record validates the effectiveness of Kingdream’s integrated design and supply approach — engineering the bit and motor as one system, not two separate products.
Q5: How much has Kingdream improved ROP in Kuwait?
Since entering a long‑term drill bit service contract with Kuwait Oil Company (KOC) in 2022, Kingdream's large‑size hybrid bits, shaped‑cutter PDC bits and RSS PDC bits have been widely applied. Through continuous product iteration in each oilfield block, the average ROP has been improved by more than 20%.
Q6: 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 (Health, Safety, Environment) system certification, and CNAS national laboratory accreditation.
Q7: What size range do Kingdream downhole tools cover?
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Drill bits: 3 1/2″ to 26″ (complete IADC coverage from 111 through 777)
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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″
Q8: What intellectual property does Kingdream hold?
Kingdream has 140 domestic patents, 13 foreign patents and 123 proprietary technologies. The company has constructed a national rock‑breaking R&D centre and laboratory, with a large team of experts in roller cone bits, diamond bits, screw motors and other petroleum machinery.
Q9: 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.
Q10: Does Kingdream provide on‑site technical support?
Yes. Kingdream has established a service chain for all drilling processes, with sales personnel and technical service personnel working together on drilling sites, conducting joint tests and product selection with the customers. Technology isn't just shipped — it’s applied at the wellsite.
