阅读说明：本技术 一种超深孔扩孔器的制作方法 (Manufacturing method of ultra-deep hole reamer ) 是由 王久全 何蕙岚 刘志强 李婕 罗巍 卢敬利 谷孝宾 孙大力 于 2021-08-16 设计创作，主要内容包括：本发明涉及一种超深孔扩孔器的制作方法,属于地质勘探用钻进技术领域。技术方案是：准备好石墨模具(1)准备烧结扩孔器胎体(5)；扩孔器胎体(5)上加入大颗粒金刚石(2)和高耗比金刚石(3)；将准备好的石墨模具(1)和加入大颗粒金刚石(2)和高耗比金刚石(3)后的扩孔器胎体(5)采用箱式炉进行烧结；将烧结好的扩孔器胎体(5),加工成扩孔器胎环准备后续焊接；将加工好的扩孔器钢体(6)和扩孔器胎环合理配合,准备二次焊接成为扩孔器；将二次焊接好的扩孔器保温处理缓慢降温；扩孔器机加工螺纹,喷砂、喷漆处理,制作完成。本发明的积极效果：克服了扩孔器在超深孔钻探中出现钢体断裂问题,更好提高钻探效率,降低钻探风险。(The invention relates to a method for manufacturing an ultra-deep hole reamer, and belongs to the technical field of drilling for geological exploration. The technical scheme is as follows: preparing a graphite die (1) to prepare a sintering reamer matrix (5); large-particle diamonds (2) and high-consumption-ratio diamonds (3) are added to the reamer matrix (5); sintering the prepared graphite mould (1) and the reamer matrix (5) added with the large-particle diamond (2) and the high-consumption-ratio diamond (3) by adopting a box-type furnace; processing the sintered reamer matrix (5) into a reamer clamping ring for subsequent welding; reasonably matching the machined reamer steel body (6) with a reamer clamping ring, and preparing for secondary welding to form a reamer; slowly cooling the secondarily welded reamer in a heat preservation process; and machining threads by using the reamer, carrying out sand blasting and paint spraying treatment, and finishing the manufacturing. The invention has the following positive effects: the problem of steel body fracture appears in the hyperdeep hole probing in the reamer has been overcome, better improve probing efficiency, reduce the probing risk.)

1. A manufacturing method of an ultra-deep hole reamer is characterized by comprising the following steps:

a. preparing a graphite die (1) to sinter a reamer matrix (5) according to the requirement of the external diameter of the reamer to be manufactured;

b. large-particle diamonds (2) and high-consumption-ratio diamonds (3) are added to the reamer matrix (5);

c. sintering the prepared graphite mould (1) and the reamer matrix (5) added with the large-particle diamond (2) and the high-consumption-ratio diamond (3) by adopting a box-type furnace;

d. processing the sintered reamer matrix (5) into a reamer clamping ring for subsequent welding;

e. preparing a reamer steel body (6), processing the reamer steel body (6) by adopting a 45MnMoB material, and performing thermal treatment and thermal refining;

f. reasonably matching the machined reamer steel body (6) with a reamer clamping ring, and preparing for secondary welding to form a reamer;

g. slowly cooling the secondarily welded reamer in a heat preservation process;

h. and machining threads by using the reamer, carrying out sand blasting and paint spraying treatment, and finishing the manufacturing.

2. The method for manufacturing an ultra-deep hole reamer according to claim 1, wherein: and g, performing secondary welding in the step g by adopting a high-frequency welding process and using a silver welding rod to perform stable welding.

3. The method for manufacturing an ultra-deep hole reamer according to claim 1, wherein the step c is performed by sintering in a box furnace, and the method is characterized in that: and in the sintering process, nitrogen inert gas is continuously filled in the furnace, so that the tire body is protected from oxidation in the sintering process.

4. The method for manufacturing an ultra-deep hole reamer according to claim 1, wherein: the gap distance between the reamer steel body and the reamer carcass ring is 0.1-0.2 mm.

5. The method for manufacturing an ultra-deep hole reamer according to claim 1, wherein: the secondary welding is high-frequency welding, and the high-frequency temperature is controlled to ensure that the gap between the reamer steel body and the reamer carcass body is welded fully.

6. The method for manufacturing an ultra-deep hole reamer according to claim 5, wherein: the high-frequency welding has high temperature rise speed, and the silver welding rod reaches a melting state within 2-3 seconds.

Technical Field

The invention relates to a method for manufacturing an ultra-deep hole reamer, and belongs to the technical field of drilling for geological exploration.

Background

The reamer is used in geological drilling and drilling hole and has the functions of correcting hole diameter and stabilizing drill pipe. The conventional reamer is formed by directly adding a matrix into a steel body adopted by the conventional reamer in a box type furnace, the processing mode is simple and quick, normal use in general geological drilling has no problem, but mineral resources of shallow holes are continuously reduced along with continuous mining of shallow holes on the earth surface, and the requirement of economic development can not be met, so the geological drilling is continuously explored and mined in deep holes and ultra-deep holes, the requirement on the performance of the steel body of the reamer is higher, the material of the conventional reamer, namely the material of the 45# cannot meet the requirement of deep hole drilling, along with continuous deepening of the hole depth, the pressure and the resistance of the hole bottom are continuously increased, the common reamer can be broken frequently, accidents are caused, and the poor treatment can cause the scrapping of drill holes. Therefore, aiming at the problems, the ultra-deep hole reamer is researched and designed, and the reamer test is normally used in 3500-4000-meter drilling construction and has a very good service life.

Disclosure of Invention

The invention aims to provide a method for manufacturing an ultra-deep hole reamer, which solves the problems that the service life of the reamer is low and the reamer is broken when the hole is deep in geological deep hole drilling and solves the problems in the prior art.

The technical scheme of the invention is as follows:

a manufacturing method of an ultra-deep hole reamer comprises the following steps:

a. preparing a graphite mould to prepare a sintered reamer matrix according to the requirement of the outer diameter of the reamer to be manufactured;

b. adding large-particle diamond and high-consumption-ratio diamond on the matrix of the reamer;

c. sintering the prepared graphite mould and the reamer matrix added with the large-particle diamond and the high-consumption-ratio diamond by adopting a box-type furnace;

d. processing the sintered reamer tire body into a reamer tire ring for subsequent welding;

e. preparing a reamer steel body, wherein the reamer steel body is processed by adopting a 45MnMoB material and is subjected to thermal treatment and quenching and tempering;

f. reasonably matching the machined reamer steel body with a reamer clamping ring, and preparing for secondary welding to form a reamer;

g. slowly cooling the secondarily welded reamer in a heat preservation process;

h. and machining threads by using the reamer, carrying out sand blasting and paint spraying treatment, and finishing the manufacturing.

And g, performing secondary welding in the step g by adopting a high-frequency welding process and using a silver welding rod to perform stable welding.

And c, sintering by adopting a box furnace, wherein nitrogen inert gas is continuously filled in the furnace in the sintering process, and the tire body is protected from oxidation in the sintering process.

The gap distance between the reamer steel body and the reamer carcass ring is 0.1-0.2 mm.

The secondary welding is high-frequency welding, and the high-frequency temperature is controlled to ensure that the gap between the reamer steel body and the reamer carcass body is welded fully.

The high-frequency welding has high temperature rise speed, and the silver welding rod reaches a melting state within 2-3 seconds.

The enlarged particle diamond is 20-25 meshes, and the high-wear-ratio diamond is a diamond with a wear ratio of more than 80000.

The invention has the following positive effects: the invention increases the strength and the abrasion-resistant strength of the reamer, overcomes the problem that the reamer breaks steel bodies in the ultra-deep hole drilling, better improves the drilling efficiency and reduces the drilling risk.

Drawings

FIG. 1 is a schematic view of a reamer mold embodying the present invention;

FIG. 2 is a schematic view of a reamer bead embodying the present invention;

FIG. 3 is a schematic representation of a reamer steel body embodying the present invention;

FIG. 4 is a schematic view of an underreamer arrangement embodying the present invention;

in the figure: the diamond-impregnated core-expanding device comprises a graphite mould 1, large-particle diamonds 2, high-specific-energy-consumption diamonds 3, a drainage channel 4, a reamer matrix 5 and a reamer steel body 6.

Detailed Description

The invention is further described with reference to the following figures and examples:

a manufacturing method of an ultra-deep hole reamer comprises the following steps:

a. preparing a graphite die 1 to prepare a sintered reamer matrix 5 according to the requirement of the external diameter of the reamer to be manufactured;

b. adding large-particle diamond 2 and high-consumption-ratio diamond 3 on the reamer matrix 5;

c. sintering the prepared graphite mold 1 and the reamer matrix 5 added with the large-particle diamond 2 and the high-consumption-ratio diamond 3 by adopting a box furnace;

d. processing the sintered reamer carcass 5 into a reamer clamping ring for subsequent welding;

e. preparing a reamer steel body 6, wherein the reamer steel body 6 is processed by adopting a 45MnMoB material and is subjected to thermal treatment and thermal refining;

f. reasonably matching the machined reamer steel body 6 with a reamer clamping ring, and preparing for secondary welding to form a reamer;

g. slowly cooling the secondarily welded reamer in a heat preservation process;

h. and machining threads by using the reamer, carrying out sand blasting and paint spraying treatment, and finishing the manufacturing.

And g, performing secondary welding in the step g by adopting a high-frequency welding process and using a silver welding rod to perform stable welding.

And c, sintering by adopting a box furnace, wherein nitrogen inert gas is continuously filled in the furnace in the sintering process, and the tire body is protected from oxidation in the sintering process.

The gap distance between the reamer steel body and the reamer carcass ring is 0.1-0.2 mm.

The secondary welding is high-frequency welding, and the high-frequency temperature is controlled to ensure that the gap between the reamer steel body and the reamer carcass body is welded fully.

The high-frequency welding has high temperature rise speed, and the silver welding rod reaches a melting state within 2-3 seconds.

The enlarged particle diamond is 20-25 meshes, and the high-wear-ratio diamond is a diamond with a wear ratio of more than 80000.

The high-consumption ratio diamond is polycrystalline with high consumption ratio.

The reamer matrix is a hard alloy matrix.

Referring to fig. 1, the raw material of the graphite mold in this example is high-purity graphite, which requires two-impregnation and three-culture graphite, and the overall density of the graphite reaches 1.78g/cm 3. Machining a preset shape by adopting a lathe and a milling machine, adhering large-particle diamond and high-consumption-ratio polycrystalline on a die according to the preset position, and finally filling powder for sintering. The sintering adopts nitrogen protection of a box furnace, and the sintering temperature is 1000 ℃.

Referring to fig. 2, the reamer bead ring of the present embodiment is formed by machining a sintered bead ring of the mold of fig. 1 by a numerically controlled lathe.

Referring to fig. 3, the steel body of the reamer of this embodiment is made of 45MnMoB, and is formed by thermal treatment and thermal refining, and then is machined by a numerically controlled lathe.

The processing precision and the matching of the reamer carcass 5 and the reamer steel body 6 are the most critical, and the matching precision is required to be controlled to be 0.1-0.2 mm. Undersizing or out of tolerance can affect reamer life. And (3) welding the sintered reamer matrix 5 and the reamer steel body 6 in a high-frequency mode, wherein the high-frequency welding is characterized in that: the temperature rises quickly, the oxidation degree of the tire ring and the steel body is reduced, and the welding strength can be ensured to the maximum extent. And the welding is carried out by adopting a silver welding rod, and the silver welding rod is melted and filled in a gap of 0.1-0.2mm between the reamer matrix 5 and the reamer steel body 6 in the welding process. And the block is rotated during welding to ensure that the gap is fully welded by silver welding. And (5) slowly cooling the semi-finished product subjected to the flux in a heat preservation furnace.

Referring to fig. 4, after the sintered reamer carcass 5 and reamer steel body 6 are welded for the second time, the reamer is machined by a numerically controlled lathe.