CN217400842U - Improved structure of double-wall drill rod - Google Patents
Improved structure of double-wall drill rod Download PDFInfo
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- CN217400842U CN217400842U CN202221357581.0U CN202221357581U CN217400842U CN 217400842 U CN217400842 U CN 217400842U CN 202221357581 U CN202221357581 U CN 202221357581U CN 217400842 U CN217400842 U CN 217400842U
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- drill rod
- wear
- resistant sleeve
- rod
- wall
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Abstract
The utility model discloses an improved structure of a double-wall drill rod, which comprises an outer drill rod, an inner drill rod and a wear-resistant sleeve, wherein the outer drill rod comprises an outer rod body, two ends of the outer rod body are connected with a male joint and a female joint through friction welding, and a welding seam is formed on the inner wall of the joint; the wear-resistant sleeve is embedded in the end part of the outer rod body connected with the female joint so as to form a thickened section, one end of the wear-resistant sleeve is limited by a raised step on the inner wall of the outer rod body, and the other end of the wear-resistant sleeve is limited by a welding seam; the inner drill rod penetrates through the outer rod body, and one end of the inner drill rod is matched and limited by the wear-resistant sleeve. The improved structure of the double-wall drill rod is provided with the wear-resistant sleeve aiming at the position, needing to be thickened, of the outer drill rod and the inner drill rod during assembly, so that the thickening difficulty of the outer drill rod is reduced, a multi-time upsetting process is omitted, the wear resistance of the matching position of the outer drill rod and the inner drill rod is enhanced, the overall strength and toughness of the drill rod are guaranteed, the production cost is reduced, and a new design thought is provided for the structure of the double-wall drill rod.
Description
Technical Field
The utility model relates to a drilling rod technical field especially relates to an improvement structure of double-walled drilling rod.
Background
Generally, the drill rod needs to be subjected to upsetting and thickening treatment to ensure the internal matching size, specifically, at the male and female joints, as shown in fig. 4, the internal cavity structure of the outer drill rod of the existing double-wall drill rod is shown, and the upsetting and thickening part is used for matching with the assembly of the inner drill rod to ensure the connection strength.
SUMMERY OF THE UTILITY MODEL
Based on the problem, the utility model aims to provide an improvement structure of double-walled drilling rod replaces the inside size forming process of traditional drilling rod, reduces the technology degree of difficulty, guarantees the drilling rod wholeness ability.
In order to achieve the purpose, the utility model adopts the following technical proposal:
an improved structure of a double-wall drill rod comprises an outer drill rod, an inner drill rod and a wear-resistant sleeve, wherein the outer drill rod comprises an outer rod body, two ends of the outer rod body are connected with a male joint and a female joint through friction welding, and a welding seam is formed on the inner wall of the connection part; the wear-resistant sleeve is embedded in the end part of the outer rod body connected with the female joint so as to form a thickened section, one end of the wear-resistant sleeve is limited by a raised step on the inner wall of the outer rod body, and the other end of the wear-resistant sleeve is limited by a welding seam; the inner drill rod penetrates through the outer rod body, and one end of the inner drill rod is matched and limited by the wear-resistant sleeve.
Preferably, one end of the inner drill rod is provided with a first connector, the other end of the inner drill rod is provided with a second connector, the first connector is embedded in the wear-resistant sleeve and forms axial spacing, and the second connector is preassembled with a connecting sleeve connected with the first connector of the other inner drill rod.
Preferably, the wear-resistant sleeve is in clearance fit with the outer rod body.
Preferably, a sealing ring is clamped between the wear-resistant sleeve and the outer rod body.
Preferably, the outer drill rod and the inner drill rod are made of 35CrMo materials, and the hardness of the outer drill rod and the inner drill rod is HRC 30-35 through heat treatment.
Preferably, the wear-resistant sleeve is made of 50CrV material, and the hardness of the wear-resistant sleeve is HRC 42-47 through heat treatment.
To sum up, the beneficial effects of the utility model are that, the improved structure of double-walled drilling rod has set up wear-resisting cover with the position that interior drilling rod assembly needs the thickening on to outer drilling rod to having reduced the outer drilling rod thickening degree of difficulty, having saved many times upsetting technology, both having strengthened the wear resistance of outer drilling rod with interior drilling rod cooperation department, guaranteed drilling rod bulk strength and toughness again, reduced manufacturing cost, proposed a new design for the structure of double-walled drilling rod.
Drawings
Fig. 1 is an overall schematic view of an improved structure of a double-wall drill rod provided by an embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is a schematic diagram illustrating the butt joint of a double-wall drill rod according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an outer drill rod among existing double-wall drill rods.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and can include, for example, fixed or removable connections, mechanical or electrical connections, direct connections, indirect connections through an intermediary, communication between two elements, or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include both the first and second features being in direct contact, and may also include the first and second features being in contact, not in direct contact, but with another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 and 2, the preferred embodiment provides an improved structure of a double-wall drill rod, which comprises an outer drill rod 1, an inner drill rod 2 and a wear-resistant sleeve 3.
Wherein the outer drill rod 1 is made of 35CrMo material, and the hardness is HRC 30-35 through heat treatment, so that sufficient performance is ensured. The outer drill rod 1 comprises an outer rod body, wherein two ends of the outer rod body are connected with a male joint 4 and a female joint 5 through friction welding, and a welding seam 6 is formed on the inner wall of the connection part.
The wear-resistant sleeve 3 is made of 50CrV material, and the hardness is HRC 42-47 through heat treatment, so that the wear-resistant characteristic is ensured. The wear-resistant sleeve 3 is embedded at the end part of the outer rod body connected with the female joint 5, so that a thickening section is formed, and the processing difficulty is reduced compared with the original upsetting and thickening process.
The wear-resistant sleeve 3 and the outer rod body are in small clearance fit, and before the working procedure of welding the male joint 4 and the female joint 5 on the outer rod body, a sealing ring 11 is further clamped between the wear-resistant sleeve 3 and the outer rod body, so that the position accuracy during preassembly is ensured.
What needs to be particularly noted is that one end of the wear-resistant sleeve 3 is limited by the protruding step 7 on the inner wall of the outer rod body, and the other end of the wear-resistant sleeve is limited by the welding line 6 generated when the outer rod body is welded with the female joint 5, so that the assembly reliability of the wear-resistant sleeve 3 is ensured, and an additional fixing process is not needed.
The inner drill rod 2 is made of 35CrMo materials, and the hardness is HRC 30-35 through heat treatment, so that sufficient performance is guaranteed. This interior drilling rod 2 wears to locate in the outer body of rod, and the one end of interior drilling rod 2 is spacing by the cooperation of wear-resisting cover 3, specifically is, and the one end of interior drilling rod 2 is provided with first connector 8, and the other end is provided with second connector 9, and first connector 8 dress inlays in wear-resisting cover 3, and it is spacing to form the axial, and pre-assembly has adapter sleeve 10 on the second connector 9.
When two double-wall drill rods are connected, the male joint 4 of the outer drill rod 1 of the first double-wall drill rod is in threaded connection with the female joint 5 'of the outer drill rod 1' of the second double-wall drill rod, and the second connector 9 of the inner drill rod 2 of the first double-wall drill rod is inserted into the first connector 8 'of the inner drill rod 2' of the second double-wall drill rod through the connecting sleeve 10, so that reliable connection and performance are guaranteed, as shown in fig. 3.
In conclusion, the improved structure of the double-wall drill rod is provided with the wear-resistant sleeve aiming at the position, needing to be thickened, of the outer drill rod and the inner drill rod during assembly, so that the thickening difficulty of the outer drill rod is reduced, the multi-upsetting process is omitted, the wear resistance of the matching part of the outer drill rod and the inner drill rod is enhanced, the overall strength and toughness of the drill rod are ensured, the production cost is reduced, and a new design idea is provided for the structure of the double-wall drill rod.
The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. An improved structure of a double-wall drill rod is characterized by comprising an outer drill rod, an inner drill rod and a wear-resistant sleeve,
the outer drill rod comprises an outer rod body, two ends of the outer rod body are connected with the male joint and the female joint through friction welding, and a welding seam is formed on the inner wall of the connection part;
the wear-resistant sleeve is embedded in the end part of the outer rod body connected with the female joint, so that a thickened section is formed, one end of the wear-resistant sleeve is limited by a raised step on the inner wall of the outer rod body, and the other end of the wear-resistant sleeve is limited by the welding line;
the inner drill rod penetrates through the outer rod body, and one end of the inner drill rod is matched and limited by the wear-resistant sleeve.
2. The improved structure of the double-wall drill rod as claimed in claim 1, wherein: the one end of interior drilling rod is provided with first connector, and the other end is provided with the second connector, first connector dress inlay in the wear-resisting cover, and it is spacing to form the axial, the adapter sleeve that is equipped with in advance on the second connector and links up with the first connector of another interior drilling rod.
3. The improved structure of the double-wall drill rod as claimed in claim 1, wherein: the wear-resistant sleeve is in clearance fit with the outer rod body.
4. The improved structure of the double-wall drill rod as claimed in claim 1, wherein: and a sealing ring is clamped between the wear-resistant sleeve and the outer rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221357581.0U CN217400842U (en) | 2022-05-31 | 2022-05-31 | Improved structure of double-wall drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221357581.0U CN217400842U (en) | 2022-05-31 | 2022-05-31 | Improved structure of double-wall drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217400842U true CN217400842U (en) | 2022-09-09 |
Family
ID=83146999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221357581.0U Active CN217400842U (en) | 2022-05-31 | 2022-05-31 | Improved structure of double-wall drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217400842U (en) |
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2022
- 2022-05-31 CN CN202221357581.0U patent/CN217400842U/en active Active
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