Heavy duty drill bits

Technical Specifications – Heavy Duty 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 applications)
Functional series	Comprehensive drilling series, directional drilling series, hard formation drilling series, core bit series, impregnated bit series
Blade design	Force‑balanced, asymmetrical blade layout for stability
Cutter type	High‑performance PDC cutters with shock absorbers for hard stringers
Hydraulic design	Optimised using dynamic flow pattern simulation technology
API compliance	API Spec 7‑1 certified

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 (steel tooth) and TCI (tungsten carbide insert)
Bearing options	Rubber‑sealed journal bearing, metal‑sealed bearing
Number of types	Over 600 types across 9 series, 25 sizes
API compliance	API Spec 7‑1 certified
Grease temperature rating	Up to 250°C

Hybrid Bit Specifications

Parameter	Specification
Technology	Merges roller cone impact crushing with PDC shearing
Key advantages	Reduced operating torque, extended PDC cutter life, wider formation applicability
Cutting architecture	Three‑stage cutting (fixed + cone elements)
Field applications	Carbonate formations, interbedded hard strata, Sichuan Basin, Kuwait oilfields
Performance data	Average ROP improvement >20% in Kuwait Oil Company operations
Patent status	Multiple domestic and international patents

(Insert image: Kingdream PDC bit – force‑balanced asymmetrical blade design close‑up)

Product Types – Kingdream Heavy Duty Drill Bit Portfolio

1. PDC Bits – Comprehensive, Directional, Hard Formation Series (Sizes 3‑½″ to 26″)

Kingdream's PDC bit offering comprises eight functional product series covering every drilling scenario:

• Comprehensive drilling series – General‑purpose bits for standard vertical wells

• Directional drilling series – Optimised for build sections and steering

• Hard formation series – Reinforced cutting structures for abrasive rocks

• Core bit series – For exploration and coring operations

• Impregnated bit series – For the most abrasive formations where standard PDC cutters wear too quickly

2. Roller Cone Bits – Nine Series, 25 Sizes, 600+ Types

With over 600 IADC‑coded configurations, Kingdream roller cone bits cover every formation:

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

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

3. Hybrid Bits – Proprietary Multi‑Patent Technology

Protected by multiple domestic and international patents, Kingdream hybrid bits are available in multiple architectures:

• Fixed blade + roller cone – Merges impact crushing with shearing

• Insert‑cone hybrid bit – Cutting positions of cone cutting inserts correspond to the nose and shoulder of the cutter wing, forming three‑stage cutting

• RSS hybrid bits – Designed specifically for rotary steerable system applications, widely applied in Kuwaiti oilfields

4. Specialised Bits – Ultra‑Deep and Shale Gas Solutions

Kingdream has developed specialised drill bit solutions for challenging niches:

• Ultra‑deep well bits – For HP/HT environments, proven in Tarim Basin's 5,818‑metre record

• Shale gas PDC bits – Optimised for unconventional resource drilling, featured in the 2024 Kuwait technology promotion conference

• RSS‑compatible hybrid bits – For continuous‑rotation steering applications

Heavy Duty Application Fields – Where Kingdream Bits Dominate

Ultra‑Deep and HP/HT Wells – Tarim Basin Record

In late May of the current drilling season, a combination of a Kingdream 9‑½″ four‑blade KSF fast drilling pioneer diamond drill bit and a high‑torque equal‑stress downhole motor achieved 5,818 metres of "one‑trip drilling” footage in the northern Tarim block, setting a record for the longest single‑trip drilling run in the country and pushing drilling cycles of the second section to a new record. This achievement highlights Kingdream's capability in ultra‑deep, high‑pressure environments, relying on the company's core technologies in ultra‑high pressure structure, ultra‑hard materials, ultra‑high control ability, and ultra‑high precision manufacturing.

Interbedded and Hard Formations – Hybrid Bit Leadership

Interbedded formations—alternating soft and hard layers that cause impact damage to standard PDC cutters—are where Kingdream hybrid bits excel. The technology was developed specifically to address challenges regarding high abrasiveness, low ROP, and interbedded formations encountered in the Sichuan Basin and has since been deployed internationally. Rolling cones pre‑break hard sections, reducing the load on PDC cutters and preventing premature failure.

Middle East Carbonate Reservoirs – Kuwait Oil Company ROP Improvement

In 2022, Kingdream entered into a long‑term drill bit service contract with Kuwait Oil Company (KOC). After two years of field application, the company's advantageous products—large‑size hybrid bits, shaped‑cutter PDC bits, and RSS PDC bits—have been widely applied in Kuwaiti oilfields. Through continuous product iteration in each oilfield block, the average ROP has been improved by more than 20%, providing strong support for drilling efficiency improvement.

Central Asian Drilling – Kazakhstan Single‑Bit Record

In Kazakhstan’s challenging geological conditions, including gypsum rock and mudstone formations, a Kingdream "Peak” series PDC bit achieved 2,252 metres of penetration in a single bit run—50.13% higher than the block average. This demonstrates Kingdream's ability to deliver consistent performance across diverse international drilling environments.

Global Export Operations – 31 Countries

Kingdream’s dominant products have maintained a domestic market share exceeding 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, with 18 domestic service stations and six overseas representative offices providing on‑ground technical support.

Why Choose Kingdream for Heavy Duty Drill Bits?

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 heavy duty drill bits are designed, manufactured and tested according to API Spec 7‑1. 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 – Record‑Breaking Results

Kingdream’s heavy duty drill bit portfolio is backed by field‑proven achievements that demonstrate performance at the highest level:

Application	Achievement
Tarim Basin, China	5,818‑metre "one‑trip drilling” national record using four‑blade KSF diamond bit + high‑torque motor
Kuwait Oil Company	Over 20% average ROP improvement using large‑size hybrid bits, shaped‑cutter PDC bits, and RSS PDC bits
Kazakhstan	2,252 metres in a single bit run—50.13% above block average
Domestic market share	Maintained above 60% for many years
International market share	Reached 10% across 31 countries

Integrated Downhole Tool Supply – Bit + Motor + MWD + Tools

Kingdream does not sell drill bits in isolation. The company continues to promote integrated design and supply of drill bits and drilling tools such as downhole motors, torque impactors, and complete sets of down‑hole tool strings. Sales personnel and technical service personnel work together on drilling sites, conducting joint tests and product selection with customers. One manufacturer. One quality standard. One warranty. One service contact.

Four Core Technologies – Ultra‑High Precision Manufacturing

Kingdream's technological edge rests on four core capabilities that enable the manufacture of heavy‑duty bits capable of surviving the most extreme conditions:

• Ultra‑high pressure structure design

• Ultra‑hard materials engineering

• Ultra‑high control ability

• Ultra‑high precision manufacturing ability

The company has achieved 110 domestic patents, 11 foreign patents in the US, Russia and Iran, and 115 proprietary technologies, supported by 341 sets of advanced machinery including Scharmann machining centres and FMS flexible production lines.

Global Service Network – On‑Ground Support Where You Need It

Kingdream has established a service chain for all drilling processes, with 18 domestic service stations and six overseas representative offices. Technical personnel are stationed at drilling sites, collaborating directly with customers on joint testing and product selection to improve drilling efficiency. This global service infrastructure ensures that engineering support is available wherever Kingdream bits are running.

Frequently Asked Questions (FAQ)

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

A: PDC bits drill by shearing the rock, achieving high ROP in soft to medium‑hard, non‑abrasive formations. Roller cone bits drill by impact crushing, offering greater durability in hard and abrasive formations. Hybrid bits combine both cutting mechanisms in a single bit—rolling cones pre‑break the rock while PDC cutters complete the shearing action—reducing torque and extending bit life in interbedded formations where single‑mechanism bits fail.

Q2: What is the size range of Kingdream heavy‑duty drill bits?

A: Kingdream PDC bits range from 3‑½″ to 26″, covering eight functional product series. Roller cone bits range from 3‑¾″ to 26″, with more than 600 types across nine series and 25 sizes. Larger sizes are available on request.

Q3: What steel grades and IADC codes are available for Kingdream roller cone bits?

A: Kingdream covers IADC codes from 1xx through 8xx, from soft to extremely hard formations. TCI bits are available in rubber‑sealed and metal‑sealed bearing options, all lubricated with high‑temperature grease (250°C rating). Milled tooth bits cover IADC 1xx series for soft formations.

Q4: Are Kingdream drill bits API certified?

A: Yes. All Kingdream drill bits are manufactured to API Spec 7‑1. The company has continuously maintained the right to use the API monogram and has passed ISO9001 quality certification and HSE system certification audits. Full API documentation is included with every shipment. Third‑party inspection (BV, SGS, DNV, ABS) is welcome at any stage of manufacturing.

Q5: What is the typical lead time for heavy‑duty drill bit orders?

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

• Standard PDC bits (stock sizes): 4–6 weeks

• Standard roller cone bits (IADC‑coded): 4–6 weeks

• Custom bit designs for specific formations: 6–8 weeks

• Hybrid bits: 6–8 weeks

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

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

Q6: Can Kingdream hybrid bits be used with rotary steerable systems (RSS)?

A: Yes. Kingdream has developed RSS hybrid 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.

Q7: What is a hybrid drill bit, and when should I use it?

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

Q8: Do you provide training and field support for drill bit selection and running?

A: Yes. 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. Technical personnel are stationed at drilling sites, collaborating directly with customers on joint testing and product selection to improve drilling efficiency.

Q9: What is the maximum operating temperature for Kingdream drill bits?

A: Kingdream roller cone bits are lubricated with a wear‑resistant grease that withstands temperatures up to 250°C (482°F). Metal‑sealed bearing bits are specifically recommended for deep rock wells where drilling depth exceeds 1,000 metres and high temperatures prevail.

Q10: How do I request a quote for Kingdream heavy‑duty drill bits?

A: Please provide the following information to our export sales team:

1. Bit type (PDC, roller cone, or hybrid)

2. Size required (inches)

3. Formation type / IADC code (if known)

4. Expected drilling parameters (RPM, WOB, flow rate)

5. Well type (conventional, directional, horizontal, ultra‑deep)

6. Quantity (number of bits)

7. Bearing preference (rubber‑sealed or metal‑sealed)

We will respond within 3–5 business days with a technical proposal and firm price quotation.