API 10-5/8 Inch 7 Blades PDC Drill Bit for Drilling Tool Oilfield

Introduction of Steel-body:

Steel is metallurgically opposite of matrix.

It is capable of withstanding high impact loads, but is relatively soft and, without protective features, would quickly fail by abrasion and erosion.

Quality steels are essentially homogeneous with structural limits that rarely surprise their users.

Steel body bits are manufactured by machining the steel bars per design.

Advantage of steel-body PDC bits:

The strength and ductility of steel give steel-bit bodies high resistance to impact loading.

Steel bodies are considerably stronger than matrix bodies.

Because of steel material capabilities, complex bit profiles and hydraulic designs are possible and relatively easy to construct on a multi-axis, computer-numerically-controlled milling machine.

A beneficial feature of steel bits is that they can easily be rebuilt a number of times because worn or damaged cutters can be replaced rather easily.

This is a particular advantage for operators in low-cost drilling environments.

Development of PDC bits:

Fortunately, both steels and matrix are rapidly evolving, and their limitations are diminishing.

As hard-facing materials improve, steel bits are becoming extremely well protected with materials that are highly resistant to abrasion and erosion.

At the same time, the structural and wear-resisting properties of matrix materials are also rapidly improving, and the range of economic applications suitable for both types is growing.

Today's matrix has little resemblance to that of even a few years ago. Tensile strengths and impact resistance have increased by at least 33%, and cutter braze strength has increased by ≈80%.

At the same time, geometries and the technology of supporting structures have improved, resulting in strong, productive matrix products.

Applications:

Water Well drilling

Having higher ROP, diamond PDC drill bits are also widely used as water well drill bits for geothermal drilling.

Oil & Gas drilling

- It is the most widely used bit in the Oil &Gas drilling. Hydraulic factors are very important during drilling.

- PDC bits have been used in the areas that can't be available previously, such as harder, more abrasive, and more variable formations.

- The diamond PDC bit is mainly composed of the bit body, cutting teeth, nozzle, gauge protection, and API Thread connection.

Cutters

The primary contact point of a drill bit is its PDC cutters, which are made of Polycrystalline Diamond Composite (PDC).
PDC bits excel at efficiently removing rock by chopping through it.
Operating in a challenging environment, PDC cutters experience frequent heating and cooling within the well.
To maximize performance, PDC cutters with superior thermal stability and minimal thermal deterioration are preferred.
These optimized cutters demonstrate higher Rate of Penetration (ROP) and enhanced wear resistance.

Nozzles
Drill bit nozzles play a crucial role in maintaining the temperature of the PDC cutters and clearing the cutting zone.
By keeping the PDC cutters cool, the nozzles contribute to their longevity and performance.
The positioning and angle of these nozzles significantly influence the effectiveness of the drill bit. Properly placed nozzles ensure efficient cooling and help prevent heat-related issues.
Additionally, the strategic arrangement of fluid channels, in conjunction with the nozzle location, facilitates improved removal of cuttings during drilling operations.

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