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Two-way reamer

A reamer and reverse technology, applied in the direction of drilling equipment, earthwork drilling, drill bits, etc., can solve the problems of reamer sticking accidents, no cutting ability, etc., to shorten the construction time, reduce the difficulty of construction, Avoid the effect of reverse reaming stuck drill

Inactive Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect that the reamer has no cutting ability in the reverse direction in the above-mentioned prior art, which is easy to cause the reamer stuck drill accident, and to provide a reverse reamer that can be used when the forward reaming cannot be performed. Two-way reamer for reverse reaming by gear set

Method used

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Embodiment Construction

[0011] As shown in the figure, the present invention is composed of a hollow transmission shaft 1, a roller cone bit, and a centralizer. One end of the hollow transmission shaft 1 is a joint 6, and the other end is provided with a connecting thread 6. A stopper is welded in the center hole of the hollow transmission shaft 1. Plate 7, a mounting seat 3 is welded on the outer tube wall of the hollow transmission shaft 1 corresponding to the baffle plate 7; A through hole 11 communicating with the water eye 8 of the forward cone 2 and the reverse cone 4 and the center hole of the hollow transmission shaft 1 .

[0012] The centralizer includes two centralizer plates 5 and a rib 9 between the two centralizer plates 5 , grooves are arranged on the edges of the centralizer plates 5 .

[0013] When performing reaming drilling, the present invention is connected with the main and auxiliary drilling rigs respectively through the joint 6 and the thread 10 on the hollow transmission shaft...

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Abstract

The invention relates to a two-way reamer, belonging to the technical field of special tools for horizontal directional drilling crossing engineering. The two-way reamer consists of a hollow transmission shaft, a roller bit and a centralizer, wherein one end of the hollow transmission shaft is a joint, and the other end of the hollow transmission shaft is provided with connecting threads; a baffle is welded in a central hole of the hollow transmission shaft; an installation base is welded on an outer pipe wall of the hollow transmission shaft corresponding to the baffle; a positive roller and a negative roller are welded on the installation base; and a through hole communicated with water holes of the positive roller and the negative roller and the central hole of the hollow transmission shaft is arranged on the installation seat. Due to the positive roller and the negative roller, the two-way reamer is controlled by a primary drilling machine and a secondary drilling machine respectively; when the hole cannot be extended in a positive direction, the hole can be extended in a negative direction by a secondary roller group; the hole can be extended for several times in a section in which the hole is difficult to form, therefore, the problem that the drilling machine is clamped during the negative hole extension is avoided, the construction difficulty is reduced, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a two-way reamer, which belongs to the technical field of special tools used in horizontal directional drilling crossing projects. technical background [0002] During the reaming process of the rock layer during the reaming construction stage of the horizontal directional drilling project, due to the long crossing distance and high rock strength, the displacement of the mud pump is limited, and some rock cuttings cannot be carried out of the hole. One is that the working efficiency of the gear teeth decreases under the high-intensity wear of the rock, and it is often difficult for one reamer to complete the reaming task of the entire hole. When the reaming operation is slow, the rock reamer must be withdrawn to replace the rock reamer. The second is the accumulation of rock cuttings in the hole, which may easily cause the drilling accident of the reamer. When a sticking accident occurs in the traditional reamer, the reamer ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/34
Inventor 李刚何勇庞海涛许再胜张戈李肇军
Owner CHINA PETROLEUM & CHEM CORP
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