Rock bit

A technology of roller cone bits and drill bits, which is applied to drill bits, drill pipes, drill pipes, etc., can solve the problems of sediment entry, seal wear, bearing wear, etc., and achieve the effect of suppressing horizontal vibration and reducing burden

Inactive Publication Date: 2011-07-27
TIX HLDG COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to wear of the seal 10, entry of sediment into the bearing part 8, and the sediment used as abrasive material causes bearing wear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] refer to figure 1One embodiment of the roller cone bit according to the present invention is described. The roller cone bit includes a bit body 4 having a journal portion 2 , a conical portion 6 rotatable relative to the bit body 4 , and a support portion 8 between the conical portion 6 and the journal portion 2 . The support portion 8 includes a ball bearing 8a and a metal bearing 8b. The roller cone bit further comprises a seal 10 disposed between the conical portion 6 and the journal portion 2 for sealing the bearing portion 8 . A plurality of carbide tips 12 and 14 are embedded in the tapered portion 6 . The cemented carbide tip includes a cemented carbide tip 12 that contacts the bottom of the well and a trimmed tip 14 that contacts the sidewall of the well.

[0038] The tapered portion 6 includes a trimmed surface 16 in contact with the well sidewall. A cemented carbide conditioning surface tip 18 is disposed on the conditioning surface 16 . The diamond comp...

Embodiment approach 2

[0052] Now, refer to Figure 9 A roller cone bit according to another embodiment of the present invention will be described.

[0053] Like the roller cone bit according to Embodiment 1, this tricone bit includes a bit body 4 having a journal portion 2 , a tapered portion 6 rotatable relative to the bit body 4 , and Between the supporting part 8. The support portion 8 includes a ball bearing 8a and a metal bearing 8b. The roller cone bit further comprises a seal 10 disposed between the conical portion 6 and the journal portion 2 for sealing the bearing portion 8 .

[0054] Unlike the case of Embodiment 1, a ring portion 30 is provided on the outer peripheral portion of the drill body 4 . A ring bit 32 is provided at the end of the ring portion 30 . Furthermore, the conical portion 6 of the tricone bit does not include a trimming tip or a trimming tip in contact with the sidewall of the well, only a cemented carbide tip 12 in contact with the bottom of the well.

[0055] A ...

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PUM

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Abstract

The present invention provides a rock bit which enables a reduction in surface pressure from a well wall and which allows possible vibration to be suppressed. A first of the present invention provides a rock bit including a bit body with a journal portion, a cone portion configured to be rotatable with respect to the bit body, a bearing portion located between the cone portion and the journal portion, and a seal provided between the cone portion and the journal portion to seal the bearing portion, wherein the cone portion includes a gauge surface that contacts a side wall of a well, and a diamond composite material is preferably disposed extensively and smoothly on the gauge surface. In a second aspect of the present invention, a ring bit is provided at an outer peripheral portion of a bit body. Furthermore, a cone portion of a tri-cone bit includes no gauge tip or surface chip that contacts the side wall of the well but only cemented carbide tips that contact a bottom of the well.

Description

technical field [0001] The present invention relates to roller cone bits. Background technique [0002] Recently, the tri-cone bit has been used as a bit for digging wells. [0003] like Figure 10 As shown, the tri-cone bit includes a drill body 4 with a journal portion 2, a conical portion 6 capable of rotating relative to the drill body 4, a bearing portion 8 between the conical portion 6 and the journal portion 2, And a seal 10 arranged between the tapered portion 6 and the journal portion 2 to seal the bearing portion 8 . A plurality of carbide tips 12 and 14 are embedded in the tapered portion 6 . The cemented carbide tip includes a cemented carbide tip 12 in contact with the bottom of the well and a trim tip 14 (gauge tip) in contact with the sidewall of the well. A trimmed surface 16 that contacts the sidewall of the well is formed inside each trimmed tip 14 in the tapered portion 6 (the trimmed surface 16 is formed closer to the bit body 4 and journal portion 2 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/50
CPCE21B10/26E21B17/1092E21B10/28
Inventor 栗林伸硕
Owner TIX HLDG COMPANY
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