Sealing structure and jar with sealing structure

Abstract

The invention discloses a sealing structure and a jar with the sealing structure, and belongs to the technical field of sealing and petroleum logging. A second sealing ring of the sealing structure isarranged at the inner side of the circumference of a first sealing ring, the mechanical strength of the first sealing ring is greater than that of the second sealing ring, the elasticity and resilience of the second sealing ring are greater than those of the first sealing ring, and the sealing effect is achieved through the combined use of the first sealing ring and the second sealing ring. The jar with the sealing structure is characterized in that the first sealing ring and the second sealing ring are arranged at the contact faces of a jar shell and jar hammer, the axial displacement of thefirst sealing ring is limited through a pressing ring, when the first sealing ring is pulled upward to an unlocking position, pressure jump exists, one side of the first sealing ring is pressed by the pressing ring, and the other side of the first sealing ring is pressed by the jar hammer, so that the first sealing ring cannot be squeezed out; when jarring is ended, the second sealing ring can utilizes the good elasticity to restore the shape of the first sealing ring and prepare for next jarring.

Description

technical field

[0001] The invention belongs to the technical field of sealing and petroleum well logging, and in particular relates to a sealing structure and a jar with the structure. Background technique

[0002] The jar is used in well logging operations, such as conventional instrument logging, shell perforation and other operations. When the instrument is stuck, the jar needs to be used to release the jam when the instrument is stuck. When the jar is shaking, after the hammer is released, there will be a sudden change in pressure between the hammer and the shell. The conventional sealing method will cause the seal to be squeezed out of the sealing groove by the hydraulic oil and lose its sealing effect, resulting in equipment failure. damage. Contents of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a sealing structure and a jar with the structure. The sealing structure adopts the first sealing ring an...

Examples

Embodiment 1

[0040] Such as figure 2 , when the shock shaft 1 is pulled up, the pressure in the high-pressure chamber rises, the hydraulic oil pushes the sealing piston 4 to move, and the sealing piston 4 pushes the push sleeve 3 to move. At this time, the push sleeve 3 is subjected to the elastic member 2 in the shock shell 6 Active force, so the greater the force of the elastic member 2, the higher the pressure in the high-pressure chamber. When the shock shaft 1 moves to a certain position, the pressure in the high-pressure chamber is released, and there is a process of pressure balance on both sides, which produces a sudden change in pressure. The vibration shaft 1 is connected with the vibration hammer 7, and the middle is sealed by a second O-ring. The shock shaft 1 and the shock housing 7 are sealed by a first O-ring. The vibration hammer 7 and the vibration shell 6 are sealed by a combined sealing ring, and the combined sealing ring is arranged between the vibration hammer 7 and...

Embodiment 2

[0043] Such as image 3, when the shock shaft 1 is pulled up, the pressure in the high-pressure chamber rises, the hydraulic oil pushes the sealing piston 4 to move, and the sealing piston 4 pushes the push sleeve 3 to move. At this time, the push sleeve 3 is subjected to the elastic member 2 in the shock shell 6 Active force, so the greater the force of the elastic member 2, the higher the pressure in the high-pressure chamber. When the shock shaft 1 moves to a certain position, the pressure in the high-pressure chamber is released, and there is a process of pressure balance on both sides, which produces a sudden change in pressure. The vibration shaft 1 is connected with the vibration hammer 7, and the middle is sealed by a second O-ring. The shock shaft 1 and the shock housing 7 are sealed by a first O-ring. The vibration hammer 7 and the vibration shell 6 are sealed by a combined sealing ring, and the combined sealing ring is arranged between the vibration hammer 7 and t...

Embodiment 3

[0046] Such as Figure 4 , when the shock shaft 1 is pulled up, the pressure in the high-pressure chamber rises, the hydraulic oil pushes the sealing piston 4 to move, and the sealing piston 4 pushes the push sleeve 3 to move. At this time, the push sleeve 3 is subjected to the elastic member 2 in the shock shell 6 Active force, so the greater the force of the elastic member 2, the higher the pressure in the high-pressure chamber. When the shock shaft 1 moves to a certain position, the pressure in the high-pressure chamber is released, and there is a process of pressure balance on both sides, which produces a sudden change in pressure. The vibration shaft 1 is connected with the vibration hammer 7, and the middle is sealed by a second O-ring. The shock shaft 1 and the shock housing 7 are sealed by a first O-ring. The vibration hammer 7 and the vibration shell 6 are sealed by a combined sealing ring, and the combined sealing ring is arranged between the vibration hammer 7 and...

technical field

[0001] The invention belongs to the technical field of sealing and petroleum well logging, and in particular relates to a sealing structure and a jar with the structure. Background technique

[0002] The jar is used in well logging operations, such as conventional instrument logging, shell perforation and other operations. When the instrument is stuck, the jar needs to be used to release the jam when the instrument is stuck. When the jar is shaking, after the hammer is released, there will be a sudden change in pressure between the hammer and the shell. The conventional sealing method will cause the seal to be squeezed out of the sealing groove by the hydraulic oil and lose its sealing effect, resulting in equipment failure. damage. Contents of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a sealing structure and a jar with the structure. The sealing structure adopts the first sealing ring an...

Examples

Embodiment 1

[0040] Such as figure 2 , when the shock shaft 1 is pulled up, the pressure in the high-pressure chamber rises, the hydraulic oil pushes the sealing piston 4 to move, and the sealing piston 4 pushes the push sleeve 3 to move. At this time, the push sleeve 3 is subjected to the elastic member 2 in the shock shell 6 Active force, so the greater the force of the elastic member 2, the higher the pressure in the high-pressure chamber. When the shock shaft 1 moves to a certain position, the pressure in the high-pressure chamber is released, and there is a process of pressure balance on both sides, which produces a sudden change in pressure. The vibration shaft 1 is connected with the vibration hammer 7, and the middle is sealed by a second O-ring. The shock shaft 1 and the shock housing 7 are sealed by a first O-ring. The vibration hammer 7 and the vibration shell 6 are sealed by a combined sealing ring, and the combined sealing ring is arranged between the vibration hammer 7 and...

Embodiment 2

[0043] Such as image 3, when the shock shaft 1 is pulled up, the pressure in the high-pressure chamber rises, the hydraulic oil pushes the sealing piston 4 to move, and the sealing piston 4 pushes the push sleeve 3 to move. At this time, the push sleeve 3 is subjected to the elastic member 2 in the shock shell 6 Active force, so the greater the force of the elastic member 2, the higher the pressure in the high-pressure chamber. When the shock shaft 1 moves to a certain position, the pressure in the high-pressure chamber is released, and there is a process of pressure balance on both sides, which produces a sudden change in pressure. The vibration shaft 1 is connected with the vibration hammer 7, and the middle is sealed by a second O-ring. The shock shaft 1 and the shock housing 7 are sealed by a first O-ring. The vibration hammer 7 and the vibration shell 6 are sealed by a combined sealing ring, and the combined sealing ring is arranged between the vibration hammer 7 and t...

Embodiment 3

[0046] Such as Figure 4 , when the shock shaft 1 is pulled up, the pressure in the high-pressure chamber rises, the hydraulic oil pushes the sealing piston 4 to move, and the sealing piston 4 pushes the push sleeve 3 to move. At this time, the push sleeve 3 is subjected to the elastic member 2 in the shock shell 6 Active force, so the greater the force of the elastic member 2, the higher the pressure in the high-pressure chamber. When the shock shaft 1 moves to a certain position, the pressure in the high-pressure chamber is released, and there is a process of pressure balance on both sides, which produces a sudden change in pressure. The vibration shaft 1 is connected with the vibration hammer 7, and the middle is sealed by a second O-ring. The shock shaft 1 and the shock housing 7 are sealed by a first O-ring. The vibration hammer 7 and the vibration shell 6 are sealed by a combined sealing ring, and the combined sealing ring is arranged between the vibration hammer 7 and...

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