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PDC drill bit suitable for middle-shallow formation directional well drilling

A directional well and drill bit technology, applied in directional drilling, drill bits, drilling equipment, etc., to improve directional capability, reduce production costs, and improve processing efficiency

Inactive Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] These methods have played a positive role in promoting the development of PDC bit technology, and alleviated the above-mentioned contradictions to a certain extent, but none of them can fundamentally solve the contradiction between shallow well and directional well PDC bit drilling ability and directional ability

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  • PDC drill bit suitable for middle-shallow formation directional well drilling
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  • PDC drill bit suitable for middle-shallow formation directional well drilling

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] see Figure 1~3 , in an embodiment of the present invention, a PDC drill bit suitable for medium and shallow directional well drilling, including a drill body 1 and a blade 2, a cutting tooth 3 and a water eye 4 arranged on the drill body 1, the blade 2 Set on the crown of the drill body 1, each of the blades 2 has a gage area 22, part of the blades 2 has a cutting area 21, and the blades 2 are located on the upper end surface of the drill body 1 The p...

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Abstract

The invention discloses a PDC drill bit suitable for middle-shallow formation directional well drilling. The PDC drill bit comprises a drill bit body and further comprises blades, a cutting teeth anda water hole. The blades are arranged at the crown of the drill bit body, and each blade is provided with a gauge protection area. Parts of the blades are provided with cutting areas, and the positions, above the planes where the upper end faces of the drill bit body is located, of the blades are the cutting areas. The portions below the panels are the gauge protection areas. The number of the cutting areas is smaller than that of the blades, and the number of the gauge protection area is equal to that of the blades. According to the PDC drill bit suitable for soft formation directional drilling, through separation-type structural design of the cutting areas and the gauge protection areas, the number of the cutting areas and the gauge protection areas can be independently adjusted according to the formation characteristics and the directional drilling needs, and thus the directional well drilling capacity of the PDC drill bit in a middle-shallow formation can be greatly improved.

Description

technical field [0001] The invention relates to the field of drill bits for oil and gas drilling, in particular to a PDC drill bit suitable for directional well drilling in middle and shallow layers. Background technique [0002] With the continuous development of drilling technology, the directional drilling technology of medium and shallow layers is becoming more and more mature, and the three-section trajectory design mode of vertical well section-increasing section-stabilizing section is usually adopted. Drilling in vertical section usually adopts compound drilling; drilling in directional section adopts the combination of sliding drilling and compound drilling to control the wellbore trajectory, in which sliding drilling is mainly used for trajectory control of directional deflection section, To ensure that the actual drilling trajectory meets the designed well inclination and azimuth, compound drilling is mainly used to optimize the wellbore trajectory in the inclinati...

Claims

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Application Information

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IPC IPC(8): E21B10/54E21B7/04
CPCE21B10/54E21B7/04
Inventor 贺庆沈建中周玉仓曹建山邹宽王洪亮樊华汪琼秦杜胡进科李璨张晓荣韦富
Owner CHINA PETROLEUM & CHEM CORP
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