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Streamline PDC drill bit capable of improving rock carrying capability and design method of streamline PDC drill bit

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

Active Publication Date: 2021-07-13
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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  • Streamline PDC drill bit capable of improving rock carrying capability and design method of streamline PDC drill bit
  • Streamline PDC drill bit capable of improving rock carrying capability and design method of streamline PDC drill bit
  • Streamline PDC drill bit capable of improving rock carrying capability and design method of streamline PDC drill bit

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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] like 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 differe...

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Abstract

The invention relates to a streamline PDC drill bit for improving rock carrying capability and a design method of the streamline PDC drill bit. Five novel streamline blades are arranged on a streamline PDC drill bit body, and a flow channel between tails of every two adjacent blades is provided with an asymmetric twisted splitter blade. The design method of the streamline PDC drill bit capable of improving the rock carrying capability comprises two major parts including a design method of a novel streamline blade and a design method of an asymmetric twisted splitter blade. Compared with a traditional PDC drill bit, the streamline PDC drill bit provided by the invention has the advantages that the flow channel between every two adjacent blades is additionally provided with the splitter blade, and in addition, the blades adopt the novel streamline design, so that the flow speed of annular fluid is accelerated, and the rock carrying efficiency of the drill bit can be improved, the generation of mud drums is avoided, and the drilling efficiency is improved.

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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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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