CN211777247U

CN211777247U - Efficient anti-torsion threaded drill rod joint

Info

Publication number: CN211777247U
Application number: CN201922491586.7U
Authority: CN
Inventors: 孙小林
Original assignee: Hilong Petroleum Drilling Tool Wuxi Co ltd
Current assignee: Hilong Petroleum Drilling Tool Wuxi Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-27
Anticipated expiration: 2029-12-31

Abstract

The utility model belongs to the technical field of oil drilling tool equipment, especially, relate to antitorque screw drill rod joint of high efficiency, the male joint is equipped with the external screw thread, the female joint is equipped with the internal thread, external screw thread and internal thread mesh mutually, connect through first bulge loop between first outer mesa and the first outer terminal surface, the internal screw thread inwards extends and is equipped with first interior mesa and first interior terminal surface, first stress lightening groove has been seted up between first interior mesa and the first interior terminal surface, connect through the second bulge loop between second outer mesa and the second outer terminal surface, the internal thread inwards extends and is equipped with interior mesa and the second interior terminal surface of second, it alleviates the groove to have seted up second stress between mesa and the second interior terminal surface in the second, first bulge loop alleviates groove looks gomphosis with second stress, second bulge loop and first stress lightening groove looks gomphosis. The utility model provides a torsional screw thread tool joint of high-efficient has higher intensity, high antitorque performance, prolongs tool joint's life, has improved drilling efficiency.

Description

Efficient anti-torsion threaded drill rod joint

Technical Field

The utility model belongs to the technical field of oil drilling tool equipment, especially, relate to antitorque screw drill rod joint of high efficiency.

Background

In recent years, with the development of the petroleum industry in China, the drilling environment of oil and gas becomes more and more severe, particularly, the development of deep wells, gas wells and oil and gas wells with heavy corrosiveness, the exploration and development of the oil engineering are more and more difficult, and the difficulty of the corresponding drilling technology is increased. The exploitation of petroleum and natural gas is realized by connecting a ground driving device and a well bottom drill bit through a drill string. The drill string functions as a drill bit, applies weight on bit, transmits power (torque or shock load), conveys drilling fluid, and other special operations. Because the stress of the drill column is complex in the underground, failure accidents are easy to happen, and when the drill column failure accidents happen, the whole well can be scrapped due to the fact that shutdown measures are not needed, time and labor are consumed, and economic losses are serious. At least 500 drilling string failure accidents occur in oil and gas fields in China every year, direct economic loss is more than 4000 ten thousand yuan, and frequent drilling tool failure accidents seriously affect the normal operation of exploration and development. The drill stem is formed by connecting a plurality of drill stems through drill stem joints in a threaded manner, and according to statistics, more than 86% of drill stem failure accidents in various large oil fields in China occur at the threaded connection part of the joints, so that the threaded part of the drill stem joint becomes a weak link of the whole drill stem. With the development of drilling technology, the well structure is more and more complex, and the formation conditions are more and more severe, so that the drill pipe joint threads need to transmit larger torque load and bear larger axial tension and compression load and bending load, and the torsion resistance of the drill pipe joint is particularly important.

SUMMERY OF THE UTILITY MODEL

The not enough of prior art, the utility model provides a high-efficient antitorque screw thread tool joint, the purpose is not high in order to solve among the prior art tool joint resistance to torsion, causes the drilling tool to become invalid, influences the technical problem of oil engineering exploration and development.

The utility model provides a torsional screw thread tool joint of high-efficient, concrete technical scheme is as follows:

the efficient torsion-resistant threaded drill rod joint comprises a male joint and a female joint, wherein the male joint is provided with an external thread, the female joint is provided with an internal thread, the external thread is meshed with the internal thread,

the external thread is provided with a first outer table surface and a first outer end surface in an outward extending mode, the first outer table surface is connected with the first outer end surface through a first convex ring, the external thread is provided with a first inner table surface and a first inner end surface in an inward extending mode, a first stress relieving groove is formed between the first inner table surface and the first inner end surface,

the internal thread is provided with a second outer table surface and a second outer end surface in an outward extending mode, the second outer table surface is connected with the second outer end surface through a second convex ring, the internal thread is provided with a second inner table surface and a second inner end surface in an inward extending mode, a second stress relieving groove is formed between the second inner table surface and the second inner end surface,

the first convex ring is embedded with the second stress relieving groove, and the second convex ring is embedded with the first stress relieving groove.

In certain embodiments, the thread taper of the internal and external threads is 1: 16.

In certain embodiments, the thread length of the internal threads and the external threads is 184.15 mm.

In some embodiments, the first stress relief groove is radiused and the second collar fits into the first stress relief groove.

In some embodiments, the second stress relief groove is arcuate and the first collar fits into the second stress relief groove.

The utility model discloses following beneficial effect has: the utility model provides a high-efficient antitorque screw drill rod joint alleviates the groove through setting up first stress and lightening groove, second stress, can effectively fall the stress concentration condition of male joint, female joint, improves its antitorque ability, is provided with first bulge loop, second bulge loop in addition, and the gomphosis respectively in second stress lightening groove, first stress lightening groove, not only improves the lock degree of male joint and female joint, has also improved drill rod joint's intensity. Therefore, the utility model provides a torsional screw thread tool joint of high-efficient has higher intensity, high antitorque performance, prolongs tool joint's life, has improved drilling efficiency.

Drawings

FIG. 1 is a schematic plan view of a high efficiency anti-torque threaded drill pipe joint according to the present invention;

fig. 2 is a schematic plan view of the male connector of the present invention;

fig. 3 is a schematic plan view of the female connector of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings 1-3.

high-efficient antitorque screw drill rod connects, including pin joint 1 and box 2, pin joint 1 is equipped with external screw thread 11, and box 2 is equipped with internal thread 21, and external screw thread 11 meshes with internal thread 21 mutually, and pin joint 1 cooperates the fastening through the meshing of internal thread 21 and external screw thread 11 with box 2. The external thread 11 extends outwards and is provided with a first outer table surface 12 and a first outer end surface 13, the first outer table surface 12 is connected with the first outer end surface 13 through a first convex ring 14, the external thread 11 extends inwards and is provided with a first inner table surface 15 and a first inner end surface 16, and a first stress reduction groove 17 is formed between the first inner table surface 15 and the first inner end surface 16. The first stress relief groove 17 relieves the stress concentration of the first inner land 15 and the first inner end face 16 of the male connector 1, and improves the torsion resistance of the male connector 1. The internal thread 21 outwards extends and is provided with a second outer table surface 22 and a second outer end surface 23, the second outer table surface 22 is connected with the second outer end surface 23 through a second convex ring 24, the internal thread 21 inwards extends and is provided with a second inner table surface 25 and a second inner end surface 26, and a second stress relieving groove 27 is formed between the second inner table surface 25 and the second inner end surface 26. The second stress relief groove 27 relieves stress concentration on the second inner land 25 and the second inner end surface 26 of the male joint 1, and improves the torsion resistance of the female joint 2. The first collar 14 is fitted in the second stress relief groove 27, and the second collar 24 is fitted in the first stress relief groove 17. The first convex ring 14 strengthens the end of the male connector 1, and the second convex ring 24 strengthens the end of the female connector 2; in addition, the first convex ring 14 is embedded with the second stress relieving groove 27, and the second convex ring 24 is embedded with the first stress relieving groove 17, so that the fastening degree of the male connector 1 and the female connector 2 is enhanced. Therefore, the strength and the torsion resistance of the drill rod joint are improved, the service life of the drill rod joint is prolonged, and the drilling efficiency is improved.

In this embodiment, the thread taper of the internal thread 21 and the external thread 11 is 1: 16. The thread length of the internal thread 21 and the external thread 11 is 184.15 mm. Thus further strengthening the torsional strength of the drill pipe joint (the torsional strength is improved by more than 1.5 times) and the degree of rotation of the male joint 1 and the female joint 2.

In this embodiment, the first stress reducing groove 17 is arc-shaped, and the second collar 24 is adapted to the first stress reducing groove 17. In this embodiment, the second stress relief groove 27 has an arc shape, and the first collar 14 is fitted in the second stress relief groove 27. In this way, the second collar 24 is fitted in the first stress relief groove 17, and the first collar 14 is fitted in the second stress relief groove 27, which further improves the degree of engagement between the male connector 1 and the female connector 2.

The above-mentioned only the utility model discloses the feasible embodiment of preferred is not right the utility model discloses a restriction, the utility model discloses also not be limited to the above-mentioned example, technical field's technical personnel the utility model discloses an in the essential scope, change, modification, interpolation or replacement made also should belong to the utility model discloses a protection scope.

Claims

1. The efficient torsion-resistant threaded drill rod joint is characterized by comprising a male joint and a female joint, wherein the male joint is provided with an external thread, the female joint is provided with an internal thread, the external thread is meshed with the internal thread,

2. The highly efficient torque resistant threaded drill pipe joint according to claim 1, wherein the thread taper of the internal and external threads is 1: 16.

3. The highly efficient torque resistant threaded drill pipe joint according to claim 1, wherein the thread length of the internal thread and the external thread is 184.15 mm.

4. The highly efficient torque resistant threaded drill pipe joint according to claim 1, wherein the first stress relief groove is radiused and the second collar is adapted to the first stress relief groove.

5. The high efficiency torque resistant threaded drill pipe joint according to claim 1, wherein the second stress relief groove is arcuate in shape and the first collar fits into the second stress relief groove.