Combined type diamond bit with rotary buffer structure

A diamond drill bit and cushioning structure technology, which is applied in the direction of drill bits, drilling tools, drilling equipment, etc., can solve problems such as lateral vibration, external PDC tooth impact collapse or even brittle fracture of the blade, strong drill bit, etc., to achieve uniform wear and avoid rapid failure, enhanced working life effect

Pending Publication Date: 2019-10-22
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, on the one hand, it is easy to cause strong lateral vibration of the drill bit due to the polygonal effect between the drill bit and the well wall; The load state of the blade PDC teeth (especially the outer PDC teeth—the PDC teeth in the outer 1 / 3 area of ​​the radial direction) changes sharply, and it rises sharply under small loads or even zero loads. When the formation rock is hard, this impact It is easy to cause impact damage or even brittle fracture of the outer PDC teeth of the blade

Method used

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  • Combined type diamond bit with rotary buffer structure
  • Combined type diamond bit with rotary buffer structure
  • Combined type diamond bit with rotary buffer structure

Examples

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Effect test

Embodiment 1

[0092] An embodiment of the present invention provides a composite diamond drill bit with a rotation buffer structure. see figure 1 and figure 2 , The drill bit includes a drill bit body 1, a blade 2, a cone consisting of two cone bodies 4 and teeth 41, a tooth palm 3, a water eye or a nozzle 5, and a buffer seat 6. The blade 2 extends from the drill body 1 or is fixed on the drill body 1 , and scraping teeth 21 are arranged on the blade 2 . A blade 2 is arranged between the front gear and the rear gear, and the buffer seat 6 is independently arranged between the front gear and the blade 2 following rotation. The rotary buffer unit 7 is rotationally connected to the buffer seat 6 through the hollow slot 61 on the buffer seat 6 . The rotary damping unit 7 consists of a rotating body 71 and damping elements or damping teeth 72 .

[0093] see figure 1 , when there are only two cones on the drill bit in this embodiment, each cone can be either a front cone or a rear cone. Wh...

Embodiment 2

[0111] The embodiment of the present invention provides a composite drill bit suitable for directional drilling in hard formations. see figure 1 , 16 and Figure 17 , The drill bit includes a drill bit body 1, a blade 2, a cone consisting of two cone bodies 4 and teeth 41, a palm 3, a water eye or a nozzle 5, and a buffer seat 6. The blade 2 extends from the drill body 1 or is fixed on the drill body 1 , and scraping teeth 21 are arranged on the blade 2 . A blade 2 is arranged between the front gear and the rear gear, and a buffer seat 6 is arranged between the front gear and the blade 2 following rotation, and a rotating buffer module is arranged on the buffer base 6 .

[0112] The drill bit also includes a drill bit axis. During the rock breaking process, the drill bit can rotate around the drill bit axis to make the scraping teeth 21 on the blade 2 move relative to the rock, thereby cutting the rock.

[0113] The cone is rotatably connected with the tooth palm 3 through...

Embodiment 3

[0134] The embodiment of the present invention provides a composite drill bit suitable for directional drilling in hard formations. see Figure 28 , The drill bit includes a drill bit body 1, a blade 2, a cone consisting of two cone bodies 4 and teeth 41, a palm 3, a water eye or a nozzle 5, and a buffer seat 6. The blade 2 extends from the drill body 1 or is fixed on the drill body 1 , and scraping teeth 21 are arranged on the blade 2 . A knife wing 2 is arranged between the front toothed wheel and the back toothed wheel, and a buffer seat 6 is arranged between the front toothed wheel and the rotating following knife wing 2 , and a rolling body is arranged on the buffer seat 6 . The rolling body and the buffer seat 6 form a rolling connection with double-side support through the hollow groove 61 on the buffer seat.

[0135] The drill bit also includes a drill bit axis. During the rock breaking process, the drill bit can rotate around the drill bit axis to make the scraping ...

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PUM

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Abstract

The invention discloses a combined type diamond bit with a rotary buffer structure, and belongs to the field of drilling. The bit mainly comprises a bit body, multiple blades and at least two tooth palms extending from the bit body or fixed to the bit body, at least two tooth wheels composed of tooth wheel bodies and teeth, water holes or nozzles; the tooth wheels are rotatably connected with thetooth palms, scraping teeth are arranged on the blades, for any two adjacent tooth wheels, in the rotating direction of the bit, the tooth wheel with the circumferential position close to the front isthe front tooth wheel, the tooth wheel with the circumferential position close to the back is the rear tooth wheel, at least one blade is arranged on the area in front of the rear tooth wheel and behind the front tooth wheel, a buffer base extending from the bit body or fixed to the bit body is arranged between at least one blade and the front tooth wheel, and a rotary buffer element is arrangedon the buffer base. According to the bit, the impact vibration of the bit in the guide drilling process can be obviously reduced, impact failures of the scraping teeth can be reduced, and the continuous drilling capacity of the bit can be improved.

Description

technical field [0001] The invention belongs to the field of technical equipment such as oil and gas drilling engineering, mining engineering, building foundation engineering drilling construction, geological drilling, geothermal drilling, hydrological drilling, tunnel engineering, shield tunneling and non-excavation, and in particular relates to a drilling bit. Background technique [0002] Drill bits are rock-breaking tools used to break rocks and form wellbores in drilling engineering. Polycrystalline diamond compact drill bits (PDC bits), roller cone bits and impregnated diamond bits are commonly used. The PDC bit relies on the polycrystalline diamond composite sheet with high hardness, high wear resistance and self-sharpening ability to shear the rock. The PDC bit has the advantages of high penetration rate, long life and low drilling cost in soft to medium hard formations. , It has been widely used in oil and gas exploration, geothermal drilling operations and other pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B12/00E21B10/43E21B10/54
CPCE21B12/00E21B10/43E21B10/54
Inventor 杨迎新张春亮牛世伟任海涛
Owner SOUTHWEST PETROLEUM UNIV
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