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A high-frequency dynamic load rock breaking tool and its application method

A dynamic load and rock-breaking technology, applied in the field of oil and gas exploration, can solve the problems of increased energy, low drilling efficiency, and high cost, and achieve the effects of maintaining stable and balanced torque, improving drilling quality, and reducing drilling costs

Active Publication Date: 2020-04-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the drilling process of oil and gas exploration, the hardness, compressive strength and abrasiveness of deep rocks increase significantly, and the energy required to break unit volume increases; at the same time, when the energy transmitted by the drill string cannot ensure the continuous rock breaking of the drill bit, stick-slip will occur Vibration aggravates the lateral and longitudinal vibrations of the drill string. Among them, the circumferential vibration and axial vibration are the most severe without being restricted by the wellbore boundary, and the damage to the drill bit is the most serious, affecting the ROP and footage, resulting in low drilling efficiency, poor quality, issues such as rising costs

Method used

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  • A high-frequency dynamic load rock breaking tool and its application method
  • A high-frequency dynamic load rock breaking tool and its application method
  • A high-frequency dynamic load rock breaking tool and its application method

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Embodiment Construction

[0033] In order to understand the content of the present invention more clearly, it will be described in detail with reference to the drawings and embodiments.

[0034] as attached figure 1 It is an overall schematic diagram of the present invention, the 120° interlocking gap connection between the shell 1 and the lower joint 2 can be seen from the outside, that is, the outer part of the inverted staggered locking mechanism 4 includes three sets of identical interlocking structures.

[0035] as attached figure 2 It is a schematic diagram of the perspective structure of the present invention. It can be seen that the fixed bearing connection between the bottom end of the impact system 3 and the lower joint 2, that is, the inner part of the undercut staggered locking mechanism 4, is attached Figure 4 It is a structural schematic diagram of the fixed bearing connection structure. The top of the shock system 3 is connected to the shunt 31 ; the shock system 3 also includes a to...

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Abstract

The invention relates to a high-frequency dynamic load rock breaking tool and a using method thereof. High-pressure drilling fluid pushes an impact rotary hammer to move to store kinetic energy, a part of the high-pressure drilling fluid is utilized for being combined with a frequency control module to control steering of a control valve, alternating distribution of the high-pressure drilling fluid on both sides of the impact hammer is achieved, pressure potential energy of the drilling fluid is ingeniously converted into torsional, high-frequency, uniform and stable mechanical impact energy and directly transmitted to a PDC drill bit, so that the torque of a whole drill string remains stable and balanced, the drill bit continuously and stably breaks rock, the drilling quality is improved,and the drilling cost is reduced.

Description

technical field [0001] The invention relates to a drilling tool, which belongs to the field of oil and gas exploration, in particular to a high-frequency dynamic load rock-breaking tool. Background technique [0002] During the drilling process of oil and gas exploration, the hardness, compressive strength and abrasiveness of deep rocks increase significantly, and the energy required to break unit volume increases; at the same time, when the energy transmitted by the drill string cannot ensure the continuous rock breaking of the drill bit, stick-slip will occur Vibration aggravates the lateral and longitudinal vibrations of the drill string. Among them, the circumferential vibration and axial vibration are the most severe without being restricted by the wellbore boundary, and the damage to the drill bit is the most serious, affecting the ROP and footage, resulting in low drilling efficiency, poor quality, issues such as rising costs. Contents of the invention [0003] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/14
CPCE21B4/14
Inventor 金衍卢运虎徐梓辰陈勉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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