Drill bit technology

Technical Specifications – Kingdream Drill Bit Parameters

PDC Bit Specifications

Parameter	Specification
Size range	3‑½″ to 26″ (88.9 mm to 660.4 mm)
Body types	Matrix body (abrasive formations), steel body (impact‑prone formations)
IADC classification	M (matrix) / S (steel) with cutter size code
Blade count	3 to 9 blades
Hydraulic design	Optimised using dynamic flow pattern simulation technology
Cutting structure	Force‑balanced, asymmetrical blade design
API standard	API Spec 7‑1
Key features	Shock absorbers for hard stringers; anti‑balling hydraulic optimisation

Roller Cone Bit Specifications

Parameter	Specification
Size range	3‑¾″ to 26″
IADC range	1xx through 8xx (soft to extremely hard formations)
Tooth types	Milled tooth, TCI (tungsten carbide insert)
Bearing types	Rubber‑sealed journal bearing, metal‑sealed bearing
API standard	API Spec 7‑1
Number of types	Over 600 types across 9 series, 25 sizes

Key Performance Indicators – Global Field Results

Application	Performance
Kuwait Oil Company	Average ROP improved by over 20% using large‑size hybrid bits, shaped‑cutter PDC bits and RSS PDC bits
Tarim Basin, China	Record‑setting 5,818 metres "one trip drilling” footage using combination of four‑blade KSF diamond bit and high torque downhole motor
Kazakhstan	"Peak” series PDC bit achieved 2,252 metres in a single run—50.13% above block average
Shale gas wells	Specialised ultra‑deep well and shale gas well drill bit solutions developed and deployed

Product Types – Kingdream Drill Bit Portfolio

Kingdream's drill bit product line is organised into eight functional product series covering PDC bits, hybrid bits and bits with other specialised features.

1. PDC Bits (8 series, sizes 3‑½″ to 26″)

• Matrix body PDC bits – For abrasive formations requiring superior erosion resistance

• Steel body PDC bits – For impact‑prone applications requiring higher toughness and field repairability

• Shaped‑cutter PDC bits – For enhanced ROP in specific formation types, successfully applied in Kuwaiti oilfields

• Force‑balanced, asymmetrical blade design for improved stability

• Dynamic flow pattern simulated hydraulics to prevent bit balling

2. Roller Cone Bits (9 series, 25 sizes, 600+ types)

• Milled tooth bits (IADC 1xx series) – For soft formations with low compressive strength

• TCI bits (IADC 4xx through 8xx) – For medium to extremely hard formations

• Rubber‑sealed and metal‑sealed bearing options – Metal‑sealed bearings for high‑temperature, high‑RPM applications

• Tungsten carbide insert technology – Optimised tooth row number, exposure height and unique alloy tooth shape

3. Hybrid Bits

• Fixed blade + rolling cone design – Merges impact crushing by roller cone with scraping by PDC bit

• Three‑stage cutting architecture – Enhances mechanical drilling rate for hard plastic strata

• Reduced operating torque – Rolling cones reduce torque, making tool face more stable

• Improved cutter life – Preliminary rock breakage by roller cones reduces load on PDC cutters

• Wider formation applicability – Effective in interbedded, hard and plastic formations where conventional bits fail

• Large‑size hybrid bits – Successfully deployed in Kuwait Oil Company operations

• RSS‑compatible hybrid bits – For rotary steerable system applications

4. Specialised Bits

• Ultra‑deep well drill bits – For HP/HT environments exceeding traditional depth and pressure limits

• Shale gas well PDC bits – Optimised for the specific demands of unconventional resource drilling

• Core bits – For core sampling in exploration drilling

Application Fields – Where Kingdream Drill Bit Technology Excels

Conventional Onshore Drilling (Vertical and Directional Wells)

Standard PDC and roller cone bits form the foundation BHA for conventional wells. Kingdream's comprehensive product range covers all IADC codes, ensuring proper bit selection for any formation—from soft clay and shale through hard limestone and dolomite to extremely hard interbedded formations.

Unconventional Shale Gas and Tight Oil Drilling

Shale gas wells present unique challenges: long lateral sections, interbedded formations, and the need for consistent ROP through thousands of metres of variable rock. Kingdream has developed specialised drill bit solutions for shale gas wells, with shaped‑cutter PDC bits and RSS PDC bits widely applied in Kuwaiti oilfields.

Ultra‑Deep and HP/HT Wells

Deep drilling pushes bits to their limits. At depths exceeding 5,000 metres, formations become harder, temperature extremes degrade cutter materials, and pressure conditions require robust bit designs. Kingdream's ultra‑deep well drill bit solutions have been deployed in record‑setting applications including the Tarim Basin's 5,818‑metre achievement.

Hard and Interbedded Formations – Hybrid Bit Advantage

Hybrid bits perform where PDC bits stall and roller cone bits wear prematurely. Interbedded formations—alternating soft and hard layers that cause impact damage to PDC cutters—are the ideal application for Kingdream hybrid bit technology. By allowing roller cones to pre‑break the rock before PDC cutters engage, the hybrid bit reduces impact loads and extends service life.

International Oilfield Operations

Kingdream has established a strong international presence through six overseas representative offices and a distribution network spanning 31 countries and regions. Key international operations include:

• Kuwait – Long‑term drill bit service contract with Kuwait Oil Company since 2022; large‑size hybrid bits, shaped‑cutter PDC bits and RSS PDC bits widely applied, with average ROP improved by over 20%

• Kazakhstan – "Peak” series PDC bit achieved 2,252 metres in a single run, 50.13% above block average

• Tarim Basin, China – Record‑setting 5,818 metres "one trip drilling” using four‑blade KSF diamond bit combined with high torque downhole motor

• Russia – Extensive operations with Kingdream brands recognised by Russian customers

Why Choose Kingdream for Drill Bit Technology?

Founded in 1973 – Over 50 Years of Drill Bit Engineering Excellence

Kingdream traces its roots to 1973 when the Jianghan Drill Bit Factory was established. After successfully introducing advanced foreign oil drill bit technology in the 1980s, the company was restructured and listed in 1998. Today, Kingdream operates as a public limited company with two drill bit manufacturing bases and a headquarters in Wuhan, China.

The company has been awarded the "National Manufacturing Single Item Champion Demonstration Enterprise” for its roller cone bits—the highest national recognition for manufacturing excellence in a specialised industrial category.

API Spec 7‑1 Certified – Full API Documentation

All Kingdream drill bits are designed, manufactured and tested according to API Spec 7‑1 for rotary drill stem elements. Kingdream has continuously maintained the right to use the API monogram and has passed ISO9001 quality certification and HSE system certification audits.

Complete certification documentation—material test reports, dimensional inspection records, and certificates of conformance—is included with every shipment. Third‑party inspection by BV, SGS, DNV or ABS is welcome at any stage of manufacturing.

Global Field‑Proven Performance – 31 Countries, 60%+ Domestic Share

Kingdream's leading oil drilling roller bits have maintained a domestic market share of over 60% for many years, with an international market share reaching 10%. Products are exported to 31 countries and regions including the United States, Canada, Iran, Russia, Kazakhstan and Sudan.

The company has established 18 domestic service stations and six overseas representative offices, with technical and sales personnel stationed at drilling sites providing on‑ground support.

End‑to‑End Downhole Tool Ecosystem – Bit + Motor + MWD + Tools

Kingdream does not just sell drill bits. The company manufactures the complete downhole tool ecosystem: PDC and roller cone bits, downhole motors, MWD/LWD tools, drilling jars, stabilisers, non‑magnetic drill collars and fishing tools. One manufacturer. One quality standard. One warranty. One service contact.

National‑Level R&D – 110 Patents, 115 Proprietary Technologies

Kingdream has achieved 110 Chinese patents, 11 foreign patents in the US, Russia and Iran, and 115 proprietary technologies. The company operates a national‑level rock cutting research centre and laboratory, with advanced equipment including Scharmann machining centres and FMS flexible production lines totaling 341 sets.

This R&D infrastructure develops next‑generation drill bits for ever‑deeper wells, harder formations and more extreme drilling environments.

Proven Commercial Success – Record‑Setting Performance

Kingdream's track record includes the 5,818‑metre "one trip drilling” record in the Tarim Basin, 2,252‑metre single‑bit run in Kazakhstan, and over 20% ROP improvement in Kuwait Oil Company operations. These achievements are not isolated successes—they represent the consistent performance of a world‑class drill bit manufacturer.

Frequently Asked Questions (FAQ)

Q1: What is the difference between PDC, roller cone and hybrid drill bits?

A: PDC bits use synthetic diamond cutters and drill by shearing the rock. They achieve high ROP in soft to medium‑hard, non‑abrasive formations but can be damaged in hard, interbedded or highly abrasive rocks. Roller cone bits use rotating cones with teeth or inserts that drill by crushing and gouging. They are more durable in hard, abrasive formations and interbedded sequences. Hybrid bits combine both cutting mechanisms in a single bit. The roller cones pre‑break the rock while the PDC cutters complete the shearing action, reducing torque and extending bit life while maintaining high ROP in challenging formations.

Q2: What does the IADC code mean for roller cone bits?

A: The IADC (International Association of Drilling Contractors) code indicates the bit's intended formation application. The first digit indicates formation hardness—1 through 8 from soft to extremely hard. The second digit indicates the cutting structure type. The third digit specifies bearing and seal type. The fourth digit indicates gauge protection. For example, IADC 447 indicates a series 4 (medium formation) TCI bit with sealed journal bearing.

Q3: What is the size range of Kingdream drill bits?

A: Kingdream PDC bits range from 3‑½″ to 26″ covering all common hole diameters. Roller cone bits range from 3‑¾″ to 26″. For specialised applications outside these ranges, custom designs are available on request.

Q4: What is force‑balanced cutting structure, and why does it matter?

A: Force‑balanced cutting structure means the side forces acting on the bit are cancelled out, causing the bit to rotate around its centre rather than wobbling. This reduces vibration, improves directional control, prevents bit whirl and extends cutter life. Kingdream achieves this through asymmetrical blade design.

Q5: Can Kingdream drill bits be used with rotary steerable systems (RSS)?

A: Yes. Kingdream has developed RSS PDC bits specifically for rotary steerable system applications. These bits have been widely applied in Kuwaiti oilfields and are designed for the unique demands of continuous rotation steering.

Q6: What is the typical lead time for drill bit orders?

A: Lead time depends on bit type, size and customisation level:

• Standard PDC or roller cone bits (stock sizes, IADC codes): 4–6 weeks

• Custom bit designs for specific formation types: 6–8 weeks

• Hybrid bits: 6–8 weeks

• Large fleet orders (10+ bits): 8–10 weeks

Expedite options may be available—contact our sales team for current availability.

Q7: Do Kingdream drill bits carry API certification?

A: Yes. All Kingdream drill bits are manufactured to API Spec 7‑1 and the company has continuously maintained the right to use the API monogram. Complete certification documentation is included with every shipment. Third‑party inspection is welcome at any stage of manufacturing.

Q8: What is a hybrid drill bit, and when should I use it?

A: A hybrid drill bit combines fixed PDC cutters with rolling cones. It is most effective in interbedded formations where soft layers alternate with hard stringers. The rolling cones pre‑break harder sections of rock, reducing the impact load on the PDC cutters and preventing premature cutter breakage. The result is longer bit life and more consistent ROP compared to either bit type alone.

Q9: What training and field support do you provide for drill bit selection and running?

A: Kingdream provides comprehensive field support: pre‑run engineering consultation for bit selection based on formation data, on‑site technical supervision during bit runs when required, post‑run bit dull grading and performance analysis, and recommendations for bit optimisation on subsequent runs. Our technical personnel are stationed at drilling sites, collaborating directly with customers on joint testing and product selection to improve drilling efficiency.