CN215256069U

CN215256069U - Drill rod structure stable in connection

Info

Publication number: CN215256069U
Application number: CN202121551069.5U
Authority: CN
Inventors: 蔡纪东
Original assignee: Wuxi Huaxin Petroleum Machine Co ltd
Current assignee: Wuxi Huaxin Petroleum Machine Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-12-21
Anticipated expiration: 2031-07-08

Abstract

The utility model discloses a connect firm drilling rod structure, its technical scheme main points are including male joint and female joint, the tip of male joint is provided with shoulder formula connector, the tip of female joint is opened there is shoulder formula connecting hole, shoulder formula connector and shoulder formula connecting hole screw-thread fit, shoulder formula connector is including the first circular bead that is the frustum shape, the lateral surface of first circular bead is provided with the external screw thread section, it is domatic to be provided with the second on the inner wall of shoulder formula connecting hole, be provided with interior screw thread section on the domatic second, the utility model has the advantages of male joint and female joint connection are firm.

Description

Drill rod structure stable in connection

Technical Field

The utility model relates to a bore drilling rod structure for ground equipment, in particular to connect firm drilling rod structure.

Background

With the development of industrial technology, the demand of industry for energy is increasing day by day, and petroleum is taken as the source of modern industry, the life of economic development, and even energy production restricts the economic and social development of a country. So the development of oil exploration technology and drilling and production equipment is also greatly promoted by the nation and the society. The drill rod is one of necessary parts of drilling equipment, the drill rod is used for connecting surface equipment of a drilling machine and drilling and grinding equipment or a bottom hole device positioned at the bottom end of a drilling well, the main flow connection mode of a male joint and a female joint of the drill rod is linear threaded connection at present, but with the increase of drilling and production depth, the drill rod needs to bear huge internal and external pressure, distortion, bending and vibration, and the male joint and the female joint are easy to loosen.

SUMMERY OF THE UTILITY MODEL

To overcome the disadvantages of the prior art, the present invention provides a drill rod structure with stable connection, which has the advantages of stable connection of a male joint and a female joint.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a connect firm drilling rod structure, includes male joint and female joint, the tip of male joint is provided with shoulder formula connector, open the tip of female joint has shoulder formula connecting hole, shoulder formula connector and shoulder formula connecting hole screw-thread fit, shoulder formula connector is including the first circular bead that is the frustum shape, the lateral surface of first circular bead is provided with the external screw thread section, it is domatic to be provided with the second on the inner wall of shoulder formula connecting hole, it is provided with the internal thread section on the domatic second.

Further, the outer edge of the end part of the first shoulder is provided with a first chamfer, and an included angle between the first chamfer and the first shoulder in the radial direction is 60 degrees.

Further, a second chamfer is arranged on the inner edge of the end part of the first shoulder, and an included angle between the second chamfer and the first shoulder in the radial direction is 60 degrees.

Further, the shoulder type connector comprises a second shoulder, and the second shoulder is arranged at the root of the first shoulder.

Further, the outer edge of the second shoulder is provided with a chamfer, and the chamfer is set to be 45 degrees.

Furthermore, a transition part is arranged between the first shoulder and the second shoulder, the section of the transition part is in a step shape, and a groove is formed at the joint of the transition part and the second shoulder.

Furthermore, the groove surface of the groove is arc-shaped, and the size of the groove surface is R0.8 +/-0.1 mm.

Furthermore, a first slope surface and a third slope surface are arranged on the inner wall of the shoulder type connecting hole, and the first slope surface, the second slope surface and the third slope surface are sequentially arranged from outside to inside.

Further, a transition surface is arranged between the first slope surface and the second slope surface, and an included angle between the transition surface and the radial direction of the shoulder type connecting hole is 60 degrees.

Further, the intersection angle between the third slope surface and the axial direction of the female joint is 30 degrees.

To sum up, the utility model discloses following beneficial effect has:

1. because the shoulder type connector and the shoulder type connecting hole are obliquely arranged, the length of the threaded connection part is longer under the condition that the parts have the same length, so that the male connector and the female connector are connected more tightly, the bearing capacity of acting force in all directions is improved, and the connection looseness or the part fracture condition is reduced.

2. Chamfers are arranged on the edge of the end part of the shoulder type connector and the inner edge of the shoulder type connecting hole, so that the edges are prevented from colliding with each other when the shoulder type connector and the shoulder type connecting hole are connected in an inserting mode; on the other hand, when drilling, the slight axial float can inevitably occur, so the chamfer leaves a certain space at the edge of the connecting part, and the damage of the collision edge of the component is reduced.

3. The transition part is used for realizing smooth transition of the appearance between the first shoulder and the second shoulder, and the groove of the transition part can provide an installation space of the sealing ring, so that the sealing performance of the part connection part is further improved.

4. The groove face of the groove is arranged in a circular arc mode, so that sharp edges are prevented from appearing at transition positions between the first shoulder and the second shoulder, and local stress concentration caused by the sharp edges is avoided.

Drawings

FIG. 1 is a schematic structural view of a jointed and secured drill pipe structure;

FIG. 2 is a schematic half-sectional view of the male connector;

FIG. 3 is an enlarged partial schematic view of FIG. 2 at A;

fig. 4 is a schematic view of a half-section structure of the female joint.

In the figure, 1, a male connector; 11. a shoulder connector; 12. a first chamfer; 13. a second chamfer; 14. an external threaded section; 15. a first shoulder; 151. a transition section; 16. a second shoulder; 2. a female joint; 21. a shoulder type connecting hole; 22. a first slope surface; 221. a transition surface; 23. a second slope surface; 231. an internal thread section; 24. and a third slope surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following device of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

Example (b): a firmly connected drill pipe structure is shown in figure 1 and comprises a male connector 1 and a female connector 2, wherein the male connector 1 and the female connector 2 are detachably connected into a whole through threads.

Further, as shown in fig. 2, the end of the male connector 1 is provided with a shoulder connector 11, and the shoulder connector 11 is inserted into the female connector 2 when the drill rod is installed. An inner hole is formed in the shoulder connector 11, and a corresponding space is reserved for installing a drill rod.

Further, as shown in fig. 2, the shoulder connector 11 includes a first shoulder 15 and a second shoulder 16, and the second shoulder 16 is located at the root of the first shoulder 15. The first shoulder 15 is in the shape of a frustum, and the first shoulder 15 gradually increases in size from the outside to the inside. The outer side surface of the first shoulder 15 is provided with an external thread section 14, and the external thread section 14 is detachably connected with the female joint 2, so that on one hand, compared with a straight thread, the oblique thread has stronger capability of bearing a side load, and on the other hand, under the condition of the same length of parts, the threaded connection length of the oblique thread is longer, and the connection between the male joint 1 and the female joint 2 is more compact and stable.

Further, as shown in fig. 2, the end outer edge of the first shoulder 15 is provided with a first chamfer 12, the included angle between the first chamfer 12 and the first shoulder 15 in the radial direction is 60 degrees, the outer edge of the first shoulder 15 is prevented from generating a right-angled edge, the edge collision situation during the connection of the male joint 1 and the female joint 2 is further reduced, a certain space is reserved at the end outer edge of the first shoulder 15, and if the component slightly shakes or axially moves, the edge collision of the components is avoided as much as possible.

Further, as shown in fig. 2, the end inner edge of the first shoulder 15 is provided with a second chamfer 13, the included angle between the second chamfer 13 and the first shoulder 15 in the radial direction is 60 degrees, and also, in order to avoid the occurrence of a right-angled edge, the drill rod can be conveniently inserted, and a certain space is reserved through the second chamfer 13, so that the collision of components when the components move slightly is avoided, and the service life of the components is prolonged.

Further, as shown in fig. 1 and 2, the radius of the second shoulder 16 is larger than the maximum radius of the first shoulder 15, and the outer edge of the second shoulder 16 near the first shoulder 15 is provided with a chamfer angle of 45 °, also to avoid a square edge.

Further, as shown in fig. 2 and 3, a transition portion 151 is disposed between the first shoulder 15 and the second shoulder 16. The transition part 151 and the first shoulder 15 are in circular arc transition, and the radius R of the transition position is 0.8 +/-0.1 mm. Because the joint of the two parts is the position of stress concentration, the arc transition is adopted to avoid the occurrence of excessive stress concentration of the tip.

Furthermore, as shown in fig. 2 and fig. 3, a groove is formed at the joint of the transition portion 151 and the second shoulder 16, the cross section of the groove is semicircular, the radius R of the transition position is 0.8 ± 0.1mm, the groove is used for smooth transition between the second shoulder 16 and the first shoulder 15, and the groove provides a space for installing a seal ring, so as to ensure the sealing performance of the joint.

Further, as shown in fig. 4, a shoulder type connecting hole 21 is formed at an end portion of the female connector 2, and the shoulder type connecting hole 21 is screw-engaged with the shoulder type connector 11, thereby connecting the male connector 1 and the female connector 2.

Further, as shown in fig. 4, a first slope 22, a second slope 23 and a third slope 24 are disposed on the inner wall of the shoulder type connecting hole 21. The first slope surface 22, the second slope surface 23 and the third slope surface 24 are sequentially arranged from outside to inside, so that the inner wall of the shoulder type connecting hole 21 forms a step structure. The outer edge of the orifice of the shoulder connecting hole 21 is provided with a chamfer, and the radial included angle between the chamfer and the shoulder connecting hole 21 is 45 degrees. As shown in fig. 1, the male connector 1 and the female connector 2 are connected, and the end of the female connector 2 abuts against the second shoulder 16, and a buffer space is formed by the chamfer of the outer edge of the shoulder type connecting hole 21 and the chamfer of the second shoulder 16, so that when the male connector 1 or the female connector 2 slightly shakes in the radial direction, the edges of the parts are prevented from colliding as much as possible.

Further, as shown in fig. 4, a transition surface 221 is disposed between the first slope surface 22 and the second slope surface 23, the transition surface 221 is an inclined surface, and an included angle between the transition surface 221 and the radial direction of the shoulder type connecting hole 21 is 60 °. The inclination degree of the first slope surface 22 is greater than that of the second slope surface 23, and the opening of the shoulder type connecting hole 21 is enlarged to facilitate the entering of the shoulder type connecting head 11.

Further, as shown in fig. 4, the slope surface 23 has a slope degree corresponding to the slope degree of the first shoulder 15, and the second slope surface 23 is provided with an internal thread section 231, and the internal thread section 231 is in threaded engagement with the external thread section 14.

Further, as shown in fig. 4, the third ramp surface 24 intersects the axial direction of the box 2 at an angle of 30 °.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a connect firm drilling rod structure which characterized in that: including male joint and female joint, the tip of male joint is provided with shoulder formula connector, the tip of female joint is opened there is shoulder formula connecting hole, shoulder formula connector and shoulder formula connecting hole screw-thread fit, shoulder formula connector is including the first circular bead that is the frustum shape, the lateral surface of first circular bead is provided with the external screw thread section, it is domatic to be provided with the second on the inner wall of shoulder formula connecting hole, be provided with internal thread section on the domatic second.

2. A firmly connected drill rod structure as claimed in claim 1, wherein: the outer edge of the end part of the first shoulder is provided with a first chamfer, and an included angle between the first chamfer and the first shoulder in the radial direction is 60 degrees.

3. A firmly connected drill rod structure as claimed in claim 2, wherein: and a second chamfer is arranged on the inner edge of the end part of the first shoulder, and the radial included angle between the second chamfer and the first shoulder is 60 degrees.

4. A firmly connected drill rod structure as claimed in claim 1, wherein: the shoulder type connector comprises a second shoulder which is arranged at the root of the first shoulder.

5. A firmly connected drill rod structure as claimed in claim 4, wherein: the outer edge of the second shoulder is provided with a chamfer, and the chamfer is set to 45 degrees.

6. A firmly connected drill rod structure as claimed in claim 5, wherein: a transition part is arranged between the first shoulder and the second shoulder, the section of the transition part is in a step shape, and a groove is formed in the joint of the transition part and the second shoulder.

7. A firmly connected drill rod structure as claimed in claim 6, wherein: the groove surface of the groove is arc-shaped, and the size of the groove is R0.8 +/-0.1 mm.

8. A firmly connected drill rod structure as claimed in claim 1, wherein: the inner wall of the shoulder type connecting hole is provided with a first slope surface and a third slope surface, and the first slope surface, the second slope surface and the third slope surface are sequentially arranged from outside to inside.

9. A firmly connected drill rod structure as claimed in claim 8, wherein: a transition surface is arranged between the first slope surface and the second slope surface, and an included angle between the transition surface and the radial direction of the shoulder type connecting hole is 60 degrees.

10. A firmly connected drill rod structure as claimed in claim 8, wherein: the intersection angle between the third slope surface and the axial direction of the female joint is 30 degrees.