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High strength antiwear drilling bit of multiple rollers

A technology of roller cone bits and roller cones, which is applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of damage to the tip of the roller cones, wear of the tooth grooves of the roller cones, and reducing the effective service life of the roller cone bits, etc. Achieve the effect of avoiding wear and breaking, enhancing strength and wear resistance, and eliminating weak links

Inactive Publication Date: 2004-10-27
SINOPEC OILFIELD EQUIP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, directional wells and extended-displacement horizontal construction account for a large proportion and more and more, and during the drilling of these wells, the force of the cone is greater than that of vertical well drilling, and the cone, especially the tooth groove There is a lot of wear, which often leads to damage to the cone tip, which reduces the effective service life of the cone bit

Method used

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  • High strength antiwear drilling bit of multiple rollers
  • High strength antiwear drilling bit of multiple rollers
  • High strength antiwear drilling bit of multiple rollers

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Embodiment Construction

[0014] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0015] The first embodiment, as shown in Fig. 1, 2, 3, 4, 5, is an insert tricone bit, including three palms, wherein one palm 4 has a cantilever shaft 9 with larger diameter and length, and the other The two palms 6 are cantilever shafts 10 with smaller diameters and lengths. The cantilever shafts are composed of a large shaft and a small shaft at the end. The length of the shaft and the small shaft is long, and the ratio of the length is 1:0.6 to 0.8. The diameter of the large shaft and the small shaft of the cantilever shaft 9 is also larger than the diameter of the large shaft and the small shaft of the cantilever shaft 10, and the ratio of the diameter is 1:0.8 ~0.95, the cantilever shaft 9 with larger diameter and length is configured with the cone with enlarged tip 3, the tip of the enlarged cone with tip (the small head part of the cone) has larg...

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Abstract

A high-strength antiwear multi-toothed-roller drill bit for drilling well has two or more palms whose upper parts are connected to form a whold drill bit body and whose lower parts are jibaxle, and multiple toothed rollers installed onto said jibaxle. Said toothed rollers is composed of the rollers with big tip on tooth and the roollers with flat front end on tooth. It has long service life.

Description

technical field [0001] The invention relates to a multi-cone drill bit with high strength and wear resistance used in the fields of petroleum, natural gas drilling and mining drilling. The drill bit is suitable for directional well drilling in various formations ranging from extremely soft to hard. Background technique [0002] Existing multi-cone bits, including two-cone bits, three-cone bits, and five-cone bits, are mainly composed of cones and cones with cutting teeth, wherein the upper parts of each palm are connected into one body to form a drill bit. Body, the lower part of the tooth palm is a cantilever shaft, and the toothed wheel is sleeved on the cantilever shaft. Usually, the shape and size of each palm and the cantilever shaft are exactly the same, and the cone palms are evenly distributed along the circumferential direction with the axis of the drill bit as the center. Since the tip (small head part) of each cone is close to the center of the drill bit, limited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/16
Inventor 樊孝兵刘小波
Owner SINOPEC OILFIELD EQUIP CORP
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