CN115898287A - Drill rod antiskid component, male end drill rod joint and female end drill rod joint - Google Patents

Abstract

The invention relates to the technical field of drilling, and particularly discloses a drill rod anti-skid component, a male end drill rod joint and a female end drill rod joint, wherein the drill rod anti-skid component comprises a joint body and a wear-resistant part, a first groove is formed in the circumferential direction of the joint body, the joint body is of a cylindrical structure, and the radius of the joint body is R1; the wear-resistant part is formed by wear-resistant materials welded in the first groove in a laser cladding mode, one side, away from the groove bottom of the first groove, of the wear-resistant part is arc-shaped, the radius of the side is R2, R2= R1, and the hardness of the wear-resistant part is larger than HRC50. The wear resistance that sets up improvement drilling rod antiskid component is applied to behind public end tool joint or the female end tool joint with it, with the drilling string connection process, avoids skidding with the tong of detaining on to the mar can not appear, and then can not increase and the sleeve pipe between the coefficient of friction, improve wear resistance and sleeve pipe life-span.

Description

Drill rod antiskid component, male end drill rod joint and female end drill rod joint

Technical Field

The invention relates to the technical field of drilling, in particular to a drill rod anti-skidding component, a male-end drill rod joint and a female-end drill rod joint.

Background

During drilling, the drill string (drill pipe) contacts and generates friction with the inner wall of the casing in the borehole, so that torque and friction are increased, and since the diameter of the drill pipe joint is 20% -30% larger than that of the drill pipe body, the drill pipe joint is more likely to contact and generate abrasion to the inner wall of the casing. When the contact force is large enough, the lubricating effect of the lubricating film is completely lost, the drill rod joint is in direct contact with the inner wall of the casing pipe to generate dry friction, and the wear to the drill rod joint and the casing pipe is serious. The drill rod joint is broken or the wall thickness of the casing is reduced, so that the extrusion resistance is reduced, and even drilling accidents or early scrapping of oil and gas wells are caused, thereby causing huge loss to oil fields.

Research results show that during drilling construction, the drill string is not centered, so that the drill rod joint and the inner wall of the casing pipe rub against each other, which is the main cause of casing pipe abrasion, and the non-centered drill string is inevitable during drilling.

Therefore, how to reduce the frictional contact or coefficient of friction between the pipe joint and the casing is the key and core to wear protection.

In the existing method, a wear-resistant belt is arranged outside a drill rod joint, the wear-resistant belt is fused on the surface of the drill rod joint in a protruding mode, and the wear-resistant belt and a sleeve are rubbed to protect the drill rod joint. Because the hardness of the wear-resistant belt is lower than that of the drill rod and lower than that of the casing, the wear-resistant belt plays a certain role in protecting the casing.

However, when the drill rod joint is connected with a drill string, the upper buckle tongs can slip at the drill rod joint, so that the surface of the drill rod joint is seriously scratched, the friction coefficient between the upper buckle tongs and a sleeve is increased, the wear resistance is reduced, and the service life of the sleeve is shortened.

Therefore, there is a need to research a drill rod anti-slip member, which can prevent the surface of the drill rod joint from being scratched when the drill rod joint is connected with a drill string, improve the friction performance of the drill rod joint and a casing, and prolong the service life of the casing.

Disclosure of Invention

The invention aims to provide a drill rod anti-slip component, which aims to solve the problems that when a drill rod joint is connected with a drill string, a locking tong slips at the drill rod joint, so that the surface of the drill rod joint is seriously scratched, the friction coefficient between the drill rod joint and a sleeve is increased, the wear resistance is reduced, and the service life of the sleeve is shortened.

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

in a first aspect, the present invention provides a drill rod slip prevention member comprising:

the joint comprises a joint body, wherein a first groove is formed in the circumferential direction of the joint body, the joint body is of a cylindrical structure, and the radius of the joint body is R1;

the wear-resistant part, the wear-resistant part by weld with the laser cladding mode in the wear-resistant material in the first recess forms, the wear-resistant part is kept away from one side of the tank bottom of first recess is the arc, and the radius is R2, and R2= R1, the hardness of wear-resistant part is greater than HRC50.

Preferably, the first groove is long and extends along the length direction of the joint body.

Preferably, the first groove comprises a left side wall, a right side wall and a groove bottom, the left side wall is arranged on the left side of the groove bottom, and the right side wall is arranged on the right side of the groove bottom.

Preferably, the distance between the left side wall and the right side wall is L1, and L1 is more than or equal to 10mm and less than or equal to 15mm.

Preferably, the included angle between the left side wall and the groove bottom is alpha, and the alpha is more than or equal to 90 degrees and less than or equal to 150 degrees;

and/or

The included angle between the right side wall and the groove bottom is beta, and the beta is more than or equal to 90 degrees and less than or equal to 150 degrees.

Preferably, the depth of the first groove is H, and H is more than or equal to 1mm and less than or equal to 2mm.

Preferably, the length of the first groove is L2, and L2 is more than or equal to 200mm and less than or equal to 228mm.

Preferably, the number of the first grooves is a plurality of, the first grooves are uniformly distributed in the axial direction of the joint body, and the number of the wear-resistant pieces is the same as that of the first grooves and is arranged in a one-to-one correspondence manner.

In a second aspect, the present invention provides a male end drill pipe joint comprising a drill pipe slip prevention member according to any one of the preceding claims.

In a third aspect, the invention provides a female end drill pipe joint comprising a drill pipe anti-slip element according to any one of the preceding claims.

The invention has the beneficial effects that:

the invention provides a drill rod anti-slip component, a male end drill rod joint and a female end drill rod joint, wherein the drill rod anti-slip component comprises a joint body, a first groove is arranged in the circumferential direction of the joint body, a wear-resistant material with the hardness larger than HRC50 is welded in the first groove in a laser cladding mode, the radius of the outer side of a wear-resistant part formed by the wear-resistant material is the same as that of the joint body, so that the cross section of the joint body at the wear-resistant part is circular, the wear resistance of the drill rod anti-slip component is improved by means of the structure, and after the drill rod anti-slip component is applied to the male end drill rod joint or the female end drill rod joint, the drill rod anti-slip component is prevented from slipping with a fastening tong in the connection process, scratches cannot occur, the friction coefficient between the drill rod anti-slip component and a sleeve cannot be increased, the wear resistance is improved, and the service life of the sleeve is prolonged.

Drawings

FIG. 1 is a schematic structural view of a drill rod slip prevention member and a male connection part in an embodiment of the invention;

FIG. 2 is a cross-sectional structural schematic view of a drill rod anti-slip member in an embodiment of the invention;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

FIG. 5 is a schematic structural view of a drill rod antiskid member and a female connection part in the embodiment of the invention.

In the figure:

1. a connector body; 11. a first groove; 111. a left side wall; 112. a right side wall; 113. the bottom of the tank;

2. a wear part;

3. a male connection portion;

4. a female connection portion.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Example one

As shown in fig. 1 to 5, the present embodiment provides a drill rod anti-slip member, which includes a joint body 1 and a wear-resistant part 2, wherein the joint body 1 is provided with a first groove 11 in the circumferential direction, the joint body 1 is of a cylindrical structure, and the radius of the joint body 1 is R1; the wear-resistant part 2 is formed by a wear-resistant material welded in the first groove 11 in a laser cladding mode, one side of the wear-resistant part 2, which is far away from the groove bottom 113 of the first groove 11, is arc-shaped, the radius of the wear-resistant part 2 is R2, R2= R1, and the hardness of the wear-resistant part 2 is greater than HRC50, that is, the rockwell hardness of the wear-resistant part 2 is greater than 50. Preferably, the wear part 2 has a hardness of HRC50-55. The hardness of the sleeve is HRC35-37; the hardness of the joint body 1 is HRC32-35. Through the mode of laser cladding welding for wearing parts 2 and joint body 1 firm in connection.

This drilling rod antiskid member is including connecting body 1, circumference at connecting body 1 sets up first recess 11, mode welding hardness through laser cladding is greater than HRC 50's abrasive material in first recess 11, and the radius in the outside of wearing part 2 that abrasive material formed is the same with the radius that connects body 1, make joint body 1 be circular in the cross section of wearing part 2 department, setting with the help of above-mentioned structure, drilling rod antiskid member's wearability has been improved, be applied to behind male end tool joint or the female end tool joint with it, with the drilling string connected process, avoid skidding with the tong of upper thread, thereby the mar can not appear, and then can not increase and the coefficient of friction between the sleeve pipe, improve wearability and sleeve pipe life-span.

In order to improve the processing efficiency, in this embodiment, the first groove 11 is in a long strip shape and extends along the length direction of the connector body 1. The first elongated groove 11 covers the contact body 1 as much as possible.

Of course, in other embodiments, the first groove 11 may be in a dot shape, the cross-sectional shape may be a circle, and a plurality of dot-shaped first grooves 11 are provided, and the plurality of first grooves 11 are uniformly distributed in the circumferential direction of the joint body 1. The first groove 11 may also be annular, and the annular first groove 11 and the joint body 1 are coaxially arranged. The annular first grooves 11 are provided in plural, and the plural annular first grooves 11 are provided at intervals in the extending direction of the joint body 1.

In order to improve the connection strength between the wear-resistant part 2 and the joint body 1, in the present embodiment, the first groove 11 includes a left side wall 111, a right side wall 112, and a groove bottom 113, the left side wall 111 is disposed on the left side of the groove bottom 113, and the right side wall 112 is disposed on the right side of the groove bottom 113. The groove bottom 113 is of a plane structure, so that the contact area between the wear-resistant part 2 and the first groove 11 is large, and the connection strength between the wear-resistant part 2 and the joint body 1 is improved. Further, the groove bottom 113 is provided with a plurality of dimples, further enlarging the contact area with the wear part 2.

In other embodiments, when the first groove 11 has an annular structure, the cross-sectional shape of the first groove 11 in the axial direction of the joint body 1 may be V-shaped.

In the embodiment, the distance between the left side wall 111 and the right side wall 112 is L1, and L1 is more than or equal to 10mm and less than or equal to 15mm. I.e. the width of the first groove 11 is L1.

Regarding the structure of the left side wall 111 and the right side wall 112, in the first embodiment of the present embodiment, the included angle between the left side wall 111 and the groove bottom 113 is α, and α is 90 ° or more and 150 ° or less. In the second embodiment of this embodiment, the angle between the right sidewall 112 and the bottom 113 is β, and β is greater than or equal to 90 ° and less than or equal to 150 °. In the third embodiment of this embodiment, the angle between the left sidewall 111 and the bottom 113 is α, and α is greater than or equal to 90 ° and less than or equal to 150 °. The included angle between the right side wall 112 and the groove bottom 113 is beta, and beta is more than or equal to 90 degrees and less than or equal to 150 degrees. When the left side wall 111 and the right side wall 112 are disposed obliquely, the minimum distance between the left side wall 111 and the right side wall 112 is L1.

In order to avoid influencing the strength of the joint body 1, the depth of the first groove 11 is H, and H is more than or equal to 1mm and less than or equal to 2mm. In other embodiments, the diameter of the joint body 1 can be set properly.

The length of the first groove 11 is L2, and L2 is more than or equal to 200mm and less than or equal to 228mm. In this embodiment, the first groove 11 may not penetrate the entire joint body 1 in the length direction, so as to avoid the outflow of molten material during the welding process. That is, the first recess 11 includes a first front end wall and a first rear end wall, and the distance between the first front end wall and the first rear end wall is L2. This setting makes the both ends of first recess 11 all can with wearing parts 2 contact, increases area of contact, improves the firm degree that connects body 1 and wearing parts 2 and connect.

The quantity of first recess 11 is a plurality of, and a plurality of first recess 11 equipartitions are in the axial that connects body 1, and the quantity of wearing parts 2 is the same with the quantity of first recess 11 and the one-to-one setting. Preferably, the included angle between every two adjacent first grooves 11 is γ, and γ =30 °. Of course, in other embodiments, the included angle γ between every two adjacent first grooves 11 is any angle in the range of 10 ° to 90 °, and may be reasonably set according to the outer diameter of the joint body 1, and is not limited thereto.

Regarding the structure and layout of the grooves, in this embodiment, in an implementation manner, a first groove 11 and a second groove may be provided, wherein the first groove 11 is a long strip, the first groove 11 extends along the axial direction of the joint body 1, the second groove is a ring, and the second groove is disposed around the outer circumference of the joint body 1 and is coaxial with the joint body 1. Furthermore, the first grooves 11 are uniformly distributed on the periphery of the joint body 1, and an included angle between every two adjacent first grooves 11 is 30 degrees; two second grooves are located at both ends of the first groove 11. Optionally, the first groove 11 and the second groove communicate. The wear part 2 fills the first recess 11 and the second recess, the wear part 2 is shaped in a manner as described above with reference to the embodiments and does not ultimately affect the outer diameter of the male end tool joint or the female male end tool joint.

In another mode, a first groove 11 and a second groove may be provided, where the first groove 11 is cylindrical or hemispherical, an axial direction of the first groove 11 is perpendicular to an axial direction of the joint body 1, the second groove is annular, and the second groove is annularly disposed on an outer periphery of the joint body 1 and is coaxially disposed with the joint body 1. Further, first recess 11 is equipped with a plurality ofly, and a plurality of first recesses 11 equipartitions form first region in the periphery that connects body 1, and two second recesses are located the both ends of first region. The wear part 2 fills the first recess 11 and the second recess, the wear part 2 being shaped in a manner as described with reference to the above embodiments.

Example two

The embodiment also provides a male-end drill pipe joint which comprises the drill pipe anti-slip component in the scheme. The hardness of the male end drill rod joint is HRC32-35. Wherein, public end tool joint includes public connecting portion 3, and public connecting portion 3 is equipped with the external screw thread, and public connecting portion 3 is located the one end of drilling rod anti-skidding component, and integrated into one piece sets up.

Example two

The embodiment also provides a female-end drill rod joint which comprises the drill rod anti-skid component in the scheme. The hardness of the female-end drill pipe joint is HRC32-35. Wherein, female end tool joint includes female connecting portion 4, and female connecting portion 4 is equipped with the internal thread, and female connecting portion 4 is located the one end of drilling rod antiskid member, and integrated into one piece sets up.

The abrasion test is carried out on the drill rod anti-skid component in the embodiment, a comparison workpiece is a common titanium alloy body, a pin-disc friction abrasion model is adopted, namely a drill rod (with or without a wear-resistant part) is used as a disc, a sleeve is used as a pin, a certain contact force is arranged between the pin and the disc, the pin reciprocates at a certain frequency, the friction coefficient of the pin and the disc is recorded in the experimental process, and the abrasion loss of the pin and the disc is recorded after the experiment is finished. The experimental parameters are room temperature T =25 ℃; contact load F =100N; sliding distance l =10mm; reciprocating frequency f =3Hz; experimental time t =2h (hours).

After the experiment lasts for 2 hours, obvious abrasion grooves can be seen on the surface of the titanium alloy body, and the abrasion is severe; the surface of the drill rod antiskid component has no obvious abrasion groove, only slight abrasion traces can be seen, and the abrasion is not serious.

The weight loss of the drill pipe and casing samples after 2h of the experiment is shown in the following table.

From the above data, the following conclusions can be drawn:

the frictional wear performance test shows that after 2 hours of frictional wear, the surface of the anti-skid component of the drill rod has no obvious wear groove, and the wear depth and the weight loss are smaller, which shows that the wear-resistant performance of the wear-resistant belt of the titanium alloy drill rod is better. In addition, the casing has less weight loss, which indicates that the drill rod antiskid component can also reduce the abrasion to the casing.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Drilling rod antiskid component, its characterized in that includes:

the joint comprises a joint body (1), wherein a first groove (11) is formed in the circumferential direction of the joint body (1), the joint body (1) is of a cylindrical structure, and the radius of the joint body (1) is R1;

wear-resisting piece (2), wear-resisting piece (2) by weld with the laser cladding mode in the wear-resisting material in first recess (11) forms, wear-resisting piece (2) keep away from one side of tank bottom (113) of first recess (11) is the arc, and the radius is R2, R2= R1, the hardness of wear-resisting piece (2) is greater than HRC50.

2. Drill rod slip-prevention element according to claim 1, characterized in that the first groove (11) is elongated and extends in the length direction of the joint body (1).

3. The drill rod slip-resistant member according to claim 2, wherein the first groove (11) comprises a left side wall (111), a right side wall (112) and a groove bottom (113), the left side wall (111) being provided on the left side of the groove bottom (113), the right side wall (112) being provided on the right side of the groove bottom (113).

4. Drill rod slip-prevention member according to claim 3, characterized in that the distance between the left side wall (111) and the right side wall (112) is L1 and 10mm ≦ L1 ≦ 15mm.

5. A drill rod slip-prevention member according to claim 3, characterized in that the angle between the left side wall (111) and the groove bottom (113) is α, and 90 ° ≦ α ≦ 150 °;

and/or

The included angle between the right side wall (112) and the groove bottom (113) is beta, and the beta is more than or equal to 90 degrees and less than or equal to 150 degrees.

6. Drill rod slip-prevention element according to claim 1, characterized in that the first groove (11) has a depth H, and 1mm ≦ H ≦ 2mm.

7. Drill rod slip-prevention member according to claim 1, characterized in that the length of the first groove (11) is L2 and 200mm ≦ L2 ≦ 228mm.

8. The drill rod antiskid member according to any one of claims 1 to 7, wherein the number of the first grooves (11) is several, the several first grooves (11) are uniformly distributed in the axial direction of the joint body (1), and the number of the wear resistant pieces (2) is the same as the number of the first grooves (11) and is arranged in a one-to-one correspondence manner.

9. A male end drill pipe joint comprising a drill pipe slip prevention member as claimed in any one of claims 1 to 8.

10. A female end drill pipe joint comprising a drill pipe slip prevention member as claimed in any one of claims 1 to 8.

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