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Drillable water hole

A water-hole and drill-type technology, applied in construction and other directions, can solve problems such as difficult drilling and removal, and achieve the effects of poor impact resistance, high hardness and high melting point.

Inactive Publication Date: 2019-12-20
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Drillable drill cores generally use alloys that are easy to drill and remove, but now the water holes of general drill bits are mostly hard alloys, which are difficult to drill and remove

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 Structural sectional view of the drillable water hole provided for the embodiment of the present invention; figure 2 A cross-sectional view of the structure of the upper casing of the drillable water hole provided by the embodiment of the present invention; image 3 A cross-sectional view of the structure of the lower casing of the drillable water hole provided by the embodiment of the present invention; Figure 4 The structural sectional view of the ceramic water hole of the drillable water hole provided by the embodiment of the present invention; as Figure 1~4 As shown, a drillable water eye provided in this embodiment includes an upper casing 1, a ceramic water eye 3, and a lower casing 5, and the outer walls of the upper casing 1 and the lower casing 5 are provided with The sealing ring groove 4, the O-ring can be filled in the sealing ring groove 4, the ceramic water eye 3 is a hollow ring structure, and its longitudinal section is a "convex" shape str...

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PUM

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Abstract

The invention relates to a drillable water hole. The drillable water hole comprises an upper sleeve body, a ceramic water hole and a lower sleeve body; sealing ring grooves are formed in the outer side walls of the upper sleeve body and the lower sleeve body; the ceramic water hole is of a hollow annular structure, and the longitudinal section thereof is of a convex structure; a first step and a second step matched with the ceramic water hole structure are arranged on the inner side walls of the upper sleeve body and the lower sleeve body; one end of the upper sleeve body is tightly contactedwith one end of the lower sleeve body; and the ceramic water hole is sleeved in a cavity formed by the upper sleeve body and the lower sleeve body, and is limited with the side wall and the bottom endof the ceramic water hole through the first step and the second step. The drillable water hole is easy to drill and capable of resisting wear.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment and tools, in particular to a drillable water hole. Background technique [0002] Casing drilling is to connect the drill bit with the lower part of the casing, and use the casing to transmit torque to drive the drill bit to rotate and drill. When drilling reaches the designed depth, the casing remains in the well for cementing. There are two kinds of casing removable drill bits and drillable drill bits. Drilling with a removable drill bit requires taking out the removable drill bit before cementing. The operation is cumbersome, and wasting time before cementing can easily affect the quality of cementing. Use the drillable bit to drill the well to the designed depth and cement the well without removing the drill bit. After the cementing is completed, use the next drill bit to drill through the drillable bit and the cement plug for the next drilling operation. The operation is convenie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/61
CPCE21B10/61
Inventor 蒋海涛郭超周俊然田晓勇梁国红左岳董颖梁红梅
Owner CNPC BOHAI DRILLING ENG
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