INTRODUCTION:

In the oil and gas industry, a drill bit is a tool designed to produce a generally cylindrical hole (wellbore) in the earth’s crust by the rotary drilling method for the discovery and extraction of hydrocarbons such as crude oil and natural gas. This type of tool is alternately referred to as a rock bit, or simply a bit. The hole diameter produced by drill bits is quite small, from about 3.5 inches (8.9 cm) to 30 inches (76 cm), compared to the depth of the hole, which can range from 1,000 feet (300 m) to more than 30,000 feet (9,100 m). Subsurface formations are broken apart mechanically by cutting elements of the bit by scraping, grinding or localized compressive fracturing. The cuttings produced by the bit are most typically removed from the wellbore and continuously returned to the surface by the method of direct circulation.

We offer comprehensive range of drilling bits suitable for customer’s needs. Our main goal is to provide efficient, precise and reliable drilling solutions to our customers.

A. Roller Cone Bit

    Type of roller cone bit is indicated by diameter code, series code, IADC classification code and optional feature code.

    For example:  8 1/2MD517X

• 8 ½ is bit diameter, indicating the bit diameter is 5 inches (215.9 mm),
• MD is series code, indicating the bit is a high speed motor bit,
• 517 is classification code, indicating IADC  code,
• X is optional feature code, indicating the main cutters are convex crested wedge

    1.  Instruction of roller cone bits structure.

     2. Type of Roller Cone Bit

         a. MD High Speed Motor Bit

             The bit working condition in directional and horizontal drilling applications is quite

             different than in vertical drilling.

             The MD series motor bit features high RPM, better gage  protection and stability, higher

             reliability, excellent hydraulic  effect and longer working life, etc.

             MD bit is suitable for drilling at 90~300 RPM and is the ideal choice for directional,

             horizontal and horizontal  multilateral  well drilling applications.

             The size range of MD series bit is from 7 7/8 to 12 1/4 inch, and IADC varies from 117 to

             647.  For example:  8 1/2 MD517X.

             Advantage of this Bit

              -  High speed Floating Bearing and Metal face seal.

              -  Higher ROP and longer working life.

              -  To  improve the bits stability, prevent bit diameter shrinkage, and extend the bits

                  working life.

         b. HF Series Bit For Hard Formation Drilling

             HF series bit has the advantages of long service life, high reliability, fast ROP and strong

             gage protection ability etc. HF series bit is the ideal choice for drilling in hard formations

             and high abrasive formations effectively and safely.

             The size range of HF series bit is from 6 to 12 1/4 inch, and IADC varies from 537 to 737.

             For example: 8 1/2 HF637GHLM.

               The advantage of using this Bit

               -  Long working life and high reliability

               -  Numerical experiment and optimized cutter material & shape ensure high efficiency of

                  cutting

B. PDC Drill Bits

    1. Bit Size:

        a. Matrix Body: 3-1/2” to 17-1/2”

        b. Steel Body: 6” to 27”

        c. Cutter Size : 8mm, 11mm, 13mm, 16mm, 19mm, 22mm, 25mm

        d. Blade Number : From 3 to 10 More

    2. PDC Bit Nomenclature

      3. Type of PDC Drill Bit

          a. Bit Size 8 1/2" M1955BGU

             Applications:

             Soft formation with low sticky layers and low compressive strength, such as clay,

             silts and  sand.

             -  Rotary Steerable & Steerable Motor Design:

                This bit incorporates proven design features to match the requirements of Rotary

                Steerable and Motor BHAs.

                The low Make-Up-Length to Bit Diameter Ratio and directional gauge pad design

                 provide excellent transfer of steering forces to achieve the required dog leg

                 severity.

             -  Force Balanced Cutting Structure:

                The bit cutting structure is balanced utilizing proprietary software. This maximizes

                drill bit stability ensuring any available drilling energy is effectively transferred to

                the cutting edge to shear the rock for high penetration rates. Bit stability also

                ensures the frequency and magnitude of vibration related impacts are minimized

                resulting in longer bit life.

             -  Trident Cutter Technology:

                Trident cutters offer the latest technology for higher resistance to abrasion

                and impact.

                Field testing demonstrates improvements can be as much as 50% more footage

                drilled and 30% higher rates of penetration.

             -  Matrix Bit Body:

                 The matrix body material provides the greatest abrasion resistance in abrasive

                 environments, such as high solids content or formations with quartz.

                 Higher body abrasion resistance reduces matrix loss between cutters and increases

                 drilling hours for longer runs to TD. 

                 Likewise, matrix body bits offer the potential for additional reruns and lower cost

                 per foot.

            -  Diamond Gauge Protection:

                The gauge pads are protected with abrasion resistant TSP diamond to ensure an

                in-gauge bit and stable directional response.

                This gauge feature is used on steel and matrix body bits.

          b. Bit Size 12 1/4’’ MS1955GUV

              Applications:

              Soft formation with low sticky layers and low compressive strength, such as clay,

              and silts.

               -  Rotary Steerable & Steerable Motor Design:

                  This bit incorporates proven design features to match the requirements of Rotary

                  Steerable and Motor BHAs. The low Make-Up-Length to Bit Diameter Ratio and

                  directional gauge pad design provide excellent transfer of steering forces to

                  achieve the required dog leg severity.

               -  Force Balanced Cutting Structure:

                  The bit cutting structure is balanced utilizing proprietary software. This maximizes

                  drill bit  stability ensuring any available drilling energy is effectively transferred to

                  the cutting edge to shear the rock for high penetration rates. Bit stability also

                  ensures the frequency and magnitude of vibration related impacts are minimized

                  which resulting in longer bit life.

               - Trident Cutter Technology:

                 Trident cutters offer the latest technology for higher resistance to abrasion and impact.

                  Field testing demonstrates improvements can be as much as 50% more footage 

                  drilled and 30% higher rates of penetration.

               -  Steel Body:

                  Steel Body bits are designed to maximize Junk Slot Area (JSA) and Face Volume (FV)

                  by taking advantage of high strength steel alloy material properties. Abrasion resistant

                  hardfacing is welded around the cutter pockets and up the blade front to prevent cutter

                  loss and maximize bit life.  The combination of Steel & Hardfacing assists to maximize

                  drilling efficiency in balling prone applications, possibly due to swelling clay, high mud

                  weight, low flow rate or H.S.I.

               -  Diamond Gauge Protection:

                  The gauge pads are protected with abrasion resistant TSP diamond to ensure and

                  in-gauge bit and stable directional response. This gauge feature is used on steel

                  and matrix body bits.

C. Benefits of using Drill Bits

    1.  High performance bit cutters with good wear resistance, impact resistance,

        and thermostability is  designed so that overall performance of cutting element is improved.

    2.  High performance matrix body material is designed to improve ability of body's abrasive

         resistance.

    3.  Crown profile and cutters placement are optimized brings the bit with higher abrasive

         resistance ability and impact resistance ability in medium and medium-hard formation.

    4.  Hydraulic system of the bit is optimized and cooling effects of the bit is improved to

         prevent the compact failure under high temperature.

    5.  Optimized Hydraulic design and enhanced cleaning and cooling effects of the bit to

         prevent bit from balling.

    6.  The bit's body material is made of steel of high quality. The good steel material and

         thinner blade design as well as deeper junk slot design helps to get higher ROP.

    7.  Wear-resistant materials are hardfaced on the surface of blade which can prevent body

         materials erosion.

    8.  From enhanced gauge protection, depth-of-cut control technology, optimized cutting

         structures to innovative anti-balling designs, our full line of PDC drill bits offer a wide

         range of solutions to the most common drilling problems. Our PDC drill bits provide

         greater drilling efficiencies and lower cost per foot.

    9.  Our economy line of bits come from a family of time tested and field proven legacy

         design products which offer excellent performance for highly drivable and predictable 

         formations. Where bit cost is a considerable portion of the overall drilling costs,

         this cost-effective product line delivers a good balance of durability and

         aggressiveness for optimum performance at a minimal cost.

RANGE/SIZE:

SUCCES STORY:

 A. CNOOC SES Ltd , Project : COO Drill Bit, 2010

 B. Odira Energy Karang Agung, Project Supply 12 EA Rock Bit, 2012

 C. Husky Cnooc Madura Limited (HCML), with project

    Purchase of PDC Drilling Bit Package A for MDA, MBH, MDK Drilling – 2018