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PDC-roller cone multiple drill bit

A compound drill bit and roller cone technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of complex grease compensation process, etc., and achieve the effect of reducing the number, simplifying the manufacturing process, and reducing the complexity

Active Publication Date: 2019-11-22
四川宝石机械石油钻头有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the PDC-cone composite drill bit provided by the present invention solves the problem of complex grease inspection and grease compensation procedures

Method used

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  • PDC-roller cone multiple drill bit
  • PDC-roller cone multiple drill bit
  • PDC-roller cone multiple drill bit

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Embodiment Construction

[0020] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0021] Such as figure 1 As shown, the PDC-cone 3 composite drill bit includes a main body, the main body includes a welded steel core 1 and a connector 4, an oil storage hole is opened on the connector 4, and the thread on the outer surface of the connector 4 covers the oil storage hole The bottom of the opening; preferably the threads cover to 1 cm below the opening of the oil storage hole.

[0022] The setting of the thr...

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Abstract

The invention discloses a PDC-roller cone multiple drill bit. The PDC-roller cone multiple drill bit comprises an oil storage compensation system lubricating seal rings and bearings, the oil storage compensation system comprises an oil storage device installed in an oil storage hole, flow guide piping meshes arranged on a steel core and a connector, and guiding lubricating grease in the oil storage device to the bearings; the oil storage device comprises an installation box, a lower cylinder body and an upper cylinder body, the lower cylinder body is fixedly installed at the bottom of the installation box, and a pressure transferring gap is formed at the bottoms of the cylinder body and the installation box by a step at the bottom of the installation box; the pressure transferring gap communicates with an injection system through a pipeline installed in a through groove of the connector, and the section, close to the injection system, of the pipeline is provided with a polytetrafluoroethylene film; and the lower cylinder body is internally provided with a decompression oil storage bag provided with a decompression pinhole on the end side of the top end in a placement mode, the decompression oil storage bag is fixed in the lower cylinder body by the upper cylinder body, and a closed oil storage cavity is formed by the upper cylinder body and the decompression oil storage bag.

Description

technical field [0001] The invention relates to a drill bit for drilling formations, in particular to a PDC-cone composite drill bit. Background technique [0002] When the cone in the drill bit rotates to cut the formation, in order to cope with the high pressure formed by the drilling fluid at the bottom of the well, an oil storage compensation device is generally designed on the back of the tooth palm. Its task is to ensure that the sealing ring and the bearing have good Working conditions, thereby improving the service life of seal rings and bearings. The bearing lubricating space between the oil storage compensation device and the tooth palm is connected by channels to form a sealed oil storage compensation system, thereby ensuring good lubrication conditions for the bearings and improving the service life of the drill bit bearings. [0003] Existing drill bits are generally equipped with multiple cones to improve drilling efficiency. In order to ensure the service lif...

Claims

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Application Information

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IPC IPC(8): E21B10/24E21B10/43E21B10/50E21B10/54E21B10/60
CPCE21B10/24E21B10/43E21B10/50E21B10/54E21B10/602
Inventor 易畅李晋秦文永川赵维宁张晓华王霞张一鹏邱波黄敏
Owner 四川宝石机械石油钻头有限责任公司
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