A streamlined pdc drill bit and its design method for improving rock-carrying capacity

A design method and a streamlined technology, applied to drill bits, drilling equipment, design optimization/simulation, etc., can solve problems such as low rock-carrying efficiency

Active Publication Date: 2022-04-08
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mud bag problem and low rock-carrying efficiency of PDC bits in the drilling process of mudstone or formations with high mud content are all problems that need to be further solved at present.

Method used

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  • A streamlined pdc drill bit and its design method for improving rock-carrying capacity
  • A streamlined pdc drill bit and its design method for improving rock-carrying capacity
  • A streamlined pdc drill bit and its design method for improving rock-carrying capacity

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Embodiment Construction

[0036] In order to have a clearer understanding of the design, purpose and effect of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0037] Such as figure 1 As shown, a structural schematic diagram of a streamlined PDC drill bit that improves rock-carrying capacity provided by the present invention includes: a drill body 1, a new streamlined blade 2, PDC teeth 3, gauge teeth 4, splitter blades 5, and a drill body 1 Five new streamlined blades 2 are arranged on the top, and a splitter blade 5 is arranged on the flow channel between the tails of each adjacent two blades, and the splitter blade 5 is fixedly connected with the drill body 1 .

[0038] The splitter blade 5 is an asymmetrically twisted blade, and the airfoil from the root of the blade to the edge of the blade is composed of airfoils with different thicknesses and different chord lengths. It is fitted by five diff...

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Abstract

The invention relates to a streamlined PDC drill bit for improving rock-carrying capacity and a design method thereof. The streamlined PDC drill bit body is provided with five novel streamlined blades, and a flow channel between the tails of each adjacent blade is arranged with one Asymmetric twisted splitter vanes. The streamlined PDC bit design method for improving rock-carrying capacity includes two parts: a new streamlined blade design method and an asymmetric twisted split blade design method. Compared with the traditional PDC bit, the present invention adds a splitter vane in the flow channel between the tails of two adjacent blades, and the blade adopts a new streamlined design, which accelerates the fluid flow rate in the annular space, thereby improving the rock-carrying efficiency and Prevent mud bag generation and improve drilling efficiency.

Description

technical field [0001] The invention relates to a streamlined PDC drill bit with enhanced rock-carrying capacity and a design method thereof, belonging to the field of drilling engineering equipment. [0002] technical background [0003] The PDC bit is a cutting type drill bit that appeared in the 1920s. It is welded or inlaid with a synthetic diamond composite sheet on the bit body or rigid body. This composite sheet can break the bottom of the well by cutting. Due to the advantages of high ROP and long service life, rock has become the main drilling equipment in oil and gas exploration and development in recent years. However, the mud bag problem and low rock-carrying efficiency of PDC bits in the drilling process of mudstone or formations with high mud content are all problems that need to be further solved at present. [0004] In view of the above problems, a streamlined PDC bit and its design method to improve the rock-carrying capacity are proposed. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/43E21B10/60G06F30/17G06F30/20
CPCE21B10/43E21B10/602G06F30/17G06F30/20
Inventor 蔡灿蒲治成高超谭政博王官平杨显鹏张沛曹煜磊何文
Owner SOUTHWEST PETROLEUM UNIV
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