High-strength safety type drill pipe

A safe and high-strength technology, applied in the direction of drill pipe, drill pipe, drilling equipment, etc., can solve the problems of drill pipe joint failure accidents, affecting the drilling effect of the drill pipe, and low strength of the drill pipe, so as to improve the overall strength and increase the strength of the drill pipe. Drilling effect, effect of sulfur resistance improvement

Inactive Publication Date: 2018-04-20
DP MASTER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the strength of ordinary drill pipe is not high. After long-term use, failure accidents will occur frequently in the drill pipe joint, making it the mai

Method used

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  • High-strength safety type drill pipe
  • High-strength safety type drill pipe
  • High-strength safety type drill pipe

Examples

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Example Embodiment

[0016] See Figure 1 to Figure 3 , The present invention relates to a high-strength safety drill rod, including a drill rod body 1, the outer thread 2 is provided on the outer periphery of the small end of the male buckle of the drill rod body 1, and the inner wall of the large end of the female buckle of the drill rod body 1 is provided with inner Thread 3, the external thread 2 of two adjacent drill rods meshes with the internal thread 3, so that the two drill rods are connected, and the drill rod body 1 has stepped surfaces on the upper and lower ends of the external thread 2 and the upper and lower ends of the internal thread 3 , Wherein the steps at the lower end of the external thread 2 and the lower end of the internal thread 3 are the main shoulder 4, and the steps at the upper end of the external thread 2 and the upper end of the internal thread 3 are the secondary shoulders 5. The drill rod body 1 is sleeved with a plurality of springs to center The spring centralizer...

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Abstract

The invention relates to a high-strength safety type drill pipe. A CY120N high-strength safety type drill pipe is adopted, and the sulfur resistance surpasses the requirement of an IRP1.8 standard. Meanwhile, an auxiliary circular bead is additionally arranged at the position where a male buckle small end and a female buckle large end are engaged, the auxiliary circular bead and a main circular bead form a double-circular-bead structure, the main circular bead face is in certain interference fit with a threaded section, the auxiliary circular bead rightly has certain auxiliary screwing and positioning functions, and accordingly accurate achievement of interference fit between the main circular bead face and the threaded section is ensured. In addition, the auxiliary circular bead can beara part of loads in the working state as well, a certain overload protection effect is achieved, the antitorque strength of the drill pipe can be improved as well, and the safety of the drill pipe is ensured. The male buckle small end of a drill pipe body is a trapezoid table, the trapezoid table forms a reinforcing section of the male buckle small end, and thus the overall strength of the drill pipe can be improved. Meanwhile, a spring centering guide is additionally arranged outside the drill pipe, the spring centering guide is used for positioning the drill pipe, shaking of the drill pipe isreduced, and the drilling effect of the drill pipe is improved.

Description

technical field [0001] The invention relates to a high-strength safety drill pipe, which belongs to the technical field of petroleum drill pipes. Background technique [0002] Drill pipe is used in drilling for oil, gas, water and mineral deposits. Drill pipes are connected by drill pipe joints. During normal rotation, the drill pipes must bear the effects of internal and external pressure, axial force, bending moment and torque at the same time. [0003] However, the strength of ordinary drill pipes is not high. After long-term use, failure accidents of drill pipe joints will occur frequently, making it the main form of drill pipe failure. In the past, when the drill pipe was drilling, the shaking range was relatively large, which affected the drilling effect of the drill pipe. Contents of the invention [0004] The object of the present invention is to overcome the above disadvantages and provide a high-strength and safe drill pipe with high strength, good safety and s...

Claims

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Application Information

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IPC IPC(8): E21B17/00E21B17/042E21B17/10
CPCE21B17/00E21B17/042E21B17/1042
Inventor 郑银良
Owner DP MASTER MFG
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