CN111577157A

CN111577157A - Aluminum alloy drill rod

Info

Publication number: CN111577157A
Application number: CN202010457543.1A
Authority: CN
Inventors: 刘永刚; 朱丽娟; 尹成先
Original assignee: Xi'an Tri Circle Technology Development Corp; China National Petroleum Corp; Pipeline Research Institute of CNPC
Current assignee: Xi'an Tri Circle Technology Development Corp; China National Petroleum Corp; CNPC Tubular Goods Research Institute; Pipeline Research Institute of CNPC
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-08-25

Abstract

The invention discloses an aluminum alloy drill rod, and belongs to the field of drill rods. An aluminum alloy drill rod is characterized in that a circle of groove is formed in the middle section of a drill rod body, an anti-abrasion ring is arranged in the groove, and an anti-abrasion material layer is arranged on the outer surface of the anti-abrasion ring; the drill pipe body is made of aluminum alloy; the material of the anti-abrasion ring is carbon steel; the wear-resistant material layer is coated and welded on the outer surface of the wear-resistant ring by adopting a welding powder/welding wire surfacing process, and the hardness is higher than HRC 53. The aluminum alloy drill rod effectively solves the abrasion-proof problem of the conventional aluminum alloy drill rod, reduces and avoids the risk of abrasion failure of the drill rod pipe body, and prolongs the service life of the drill rod.

Description

Aluminum alloy drill rod

Technical Field

The invention belongs to the field of drill rods, and particularly relates to an aluminum alloy drill rod.

Background

The aluminum alloy drill rod used in the exploration and development of the petroleum and natural gas has the characteristics of corrosion resistance, low density and high strength, and is widely applied to the development of high-acidity oil and gas reservoirs and the drilling operation of ultra-deep wells and large-displacement horizontal wells. Meanwhile, the aluminum alloy drill rod material is low in hardness and poor in wear resistance, and is not protected by a wear-resistant belt layer, so that the aluminum alloy drill rod is seriously worn in use, the application cost and the failure risk of the aluminum alloy are increased, and the application and popularization of the aluminum alloy drill rod are seriously restricted.

Disclosure of Invention

The invention aims to overcome the defect that the existing aluminum alloy drill pipe is easy to wear in use, and provides an aluminum alloy drill pipe.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:

an aluminum alloy drill rod comprises a drill rod pipe body, wherein a circle of groove is formed in the middle section of the drill rod pipe body, an anti-abrasion ring is arranged in the groove, and an anti-abrasion material layer is arranged on the outer surface of the anti-abrasion ring;

the drill pipe body is made of aluminum alloy;

the abrasion-proof ring is made of carbon steel;

the wear-resistant material layer is welded on the periphery of the wear-resistant ring, and the hardness of the wear-resistant material layer is greater than HRC 53.

Further, the thickness of the wear-resistant material layer is larger than 2.5 mm.

Furthermore, the material of the wear-resistant material layer is high-chromium iron-based alloy or tungsten carbide containing 18-25% of chromium.

Furthermore, a plurality of first key grooves are formed in the end surfaces of the two sides of the groove;

the periphery of the anti-abrasion ring is provided with a corresponding second key groove, and the anti-abrasion ring and the drill pipe body are circumferentially fixed through keys.

Furthermore, the anti-abrasion ring is fixed on the groove (1-1) through welding by a first anti-abrasion semi-circular ring and a second anti-abrasion semi-circular ring.

Furthermore, the number of the first key grooves is 4-6, and the first key grooves are uniformly distributed on the end faces of two sides of the groove.

Furthermore, the wear-resistant material layer is welded on the periphery of the wear-resistant ring in a surfacing mode by adopting welding wires or welding powder.

Compared with the prior art, the invention has the following beneficial effects:

according to the aluminum alloy drill rod, the groove is formed in the thickened part of the middle section of the drill rod pipe body, the anti-abrasion ring is arranged at the groove of the aluminum alloy pipe body, and the anti-abrasion material layer is overlaid on the anti-abrasion ring, so that the problem of abrasion resistance of the conventional aluminum alloy drill rod is effectively solved, the risk of abrasion failure of the drill rod pipe body is reduced and avoided, and the service life of the drill rod is prolonged. Meanwhile, multiple repair welding can be carried out between the steel anti-abrasion ring and the wear-resistant material, so that the service life of the pipe body is further prolonged, and the cost performance of the aluminum alloy drill pipe is further improved.

Furthermore, the second key groove on the anti-abrasion ring and the first key groove on the pipe body are in fastening connection through keys, so that the anti-abrasion ring is fixed with the drill pipe body in the circumferential direction.

Drawings

FIG. 1 is a schematic structural diagram of an aluminum alloy drill pipe of the present invention;

fig. 2 is a schematic structural view of an aluminum alloy drill pipe body of the present invention, wherein fig. 2(a) is a front view and fig. 2(b) is a sectional view;

fig. 3 is a schematic structural view of the wear ring of the present invention, wherein fig. 3(a) is a front view and fig. 3(b) is a cross-sectional view.

Wherein: 1-a drill pipe body; 2-an anti-abrasion ring; 3-a layer of wear resistant material; a 4-bond; 1-1-groove; 1-2-a first keyway; 2-1-a second keyway; 2-2-welding seam; 2-3-a first anti-wear semicircular ring; 2-4-second abrasion-proof semicircular ring.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, fig. 1 is a schematic structural diagram of an aluminum alloy drill pipe of the present invention, including a drill pipe body 1, an anti-wear ring 2, a wear-resistant material layer 3 and a key 4; the drill pipe body 1 is provided with a circle of grooves 1-1, the wear-resistant ring 2 is sleeved in the grooves 1-1 and fixed circumferentially through keys 4, the wear-resistant material layer 3 is welded on the outer surface of the wear-resistant ring 2, specifically, the wear-resistant material layer 3 is welded on the wear-resistant ring 2 in a powder/welding wire surfacing mode, the wear-resistant material layer 3 has enough hardness and thickness, if the hardness is larger than HRC53, the thickness of the wear-resistant material layer 3 is larger than 2.5 mm.

Referring to fig. 2, fig. 2(a) and fig. 2(b) are a front view and a cross-sectional view of the aluminum alloy drill pipe body of the present invention, respectively, a circle of groove 1-1 is processed on the outer surface of the

drill pipe body

1, and 2 first keyways 1-2 are respectively formed on the end surfaces of both sides of the groove 1-1; the width of the groove 1-1 is 76.2 +/-0.2 mm, and the depth is 5.5 +/-0.1 mm; the width of the first key groove 1-2 is 10 +/-0.1 mm, and the depth is 3.0 +/-0.1 mm.

Referring to fig. 3, fig. 3(a) is a front view of an anti-abrasion ring, fig. 3(b) is a cross-sectional view of the anti-abrasion ring, the anti-abrasion ring 2 is formed by welding two symmetrical semicircular rings, and after the first anti-abrasion semicircular ring 2-3 and the second anti-abrasion semicircular ring 2-4 are welded, the anti-abrasion semicircular ring is fixed at a groove 1-1 of a drill pipe body, and a welding seam 2-2 is left; the anti-abrasion ring 2 is made of carbon steel with good strength and toughness, a second key groove 2-1 corresponding to the first key groove 1-2 is processed on the outer ring surface of the anti-abrasion ring 2, the second key groove 2-1 is arranged to be flush with the axial direction of the first key groove 1-2, and the two are connected and fixed through a key 4.

The width of the anti-abrasion ring 2 is 76 +/-0.2 mm, and the thickness is 5 +/-0.2 mm; the second key groove 2-1 has a width of 10 + -0.1 mm and a depth of 2.5 + -0.1 mm.

The thickness of the wear-resistant material layer 3 is 3.0 +/-0.2 mm, and the hardness is more than HRC 53.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. An aluminum alloy drill rod is characterized by comprising a drill rod pipe body (1), wherein a circle of groove (1-1) is formed in the middle section of the drill rod pipe body (1), an anti-abrasion ring (2) is arranged in the groove (1-1), and an abrasion-resistant material layer (3) is arranged on the outer surface of the anti-abrasion ring (2);

the drill pipe body (1) is made of aluminum alloy;

the abrasion-proof ring (2) is made of carbon steel;

the wear-resistant material layer (3) is welded on the periphery of the wear-resistant ring (2), and the hardness of the wear-resistant material layer (3) is greater than HRC 53.

2. An aluminium alloy drill rod according to claim 1, characterized in that the thickness of the wear resistant material layer (3) is more than 2.5 mm.

3. The aluminum alloy drill rod as recited in claim 1, characterized in that the wear-resistant material layer (3) is made of high-chromium iron-based alloy or tungsten carbide containing 18-25% of chromium.

4. The aluminum alloy drill rod as claimed in claim 1, wherein a plurality of first key grooves (1-2) are arranged on the end surfaces of two sides of the groove (1-1);

the periphery of the anti-abrasion ring (2) is provided with a corresponding second key groove (2-1), and the anti-abrasion ring (2) and the drill pipe body (1) are circumferentially fixed through a key (4).

5. The aluminum alloy drill rod as claimed in claim 4, wherein the number of the first keyways (1-2) is 4-6, and the first keyways are uniformly distributed on the end surfaces of the two sides of the groove (1-1).

6. The aluminum alloy drill rod as claimed in claim 1, wherein the wear-resistant ring (2) is welded and fixed on the groove (1-1) by a first wear-resistant semicircular ring (2-3) and a second wear-resistant semicircular ring (2-4).

7. The aluminum alloy drill rod as recited in claim 1, characterized in that the wear-resistant material layer (3) is welded on the periphery of the wear-resistant ring (2) by means of surfacing welding with welding wire or welding powder.