阅读说明：本技术 一种热膨胀可承液压深井中震源装置 (Thermal expansion bearable hydraulic deep well seismic source device ) 是由 吴东 任道胜 李亚凯 刘志仁 于 2021-01-15 设计创作，主要内容包括：本发明涉及一种热膨胀可承液压深井中震源装置,该装置主要由上接头、承压筒、点火索、热膨胀剂、压环、剪切片、尾部接头和密封圈组成,上接头和承压筒通过螺纹连接,承压筒内装热膨胀剂,点火索穿过上接头的中心孔放置在承压筒内的膨胀剂中,尾部接头和承压筒的另一端通过螺纹连接,并由密封圈密封,尾部接头靠近承压筒端内部有压环,压环把剪切片压在尾部接头内,压环和尾部接头及剪切片之间由密封圈密封。由于承压筒及其结构设计使得震源装置可以下入几千米的深井中进行触发,除了在地面可以地震,还可以下入深井进行地震,不管是在地面还是在井下,都能代替火药震源；安全可靠,避免了爆炸物,解决了震源问题。(The invention relates to a thermal expansion bearable hydraulic deep well seismic source device which mainly comprises an upper joint, a pressure bearing cylinder, an ignition cable, a thermal expansion agent, a pressure ring, a shear slice, a tail joint and a sealing ring. The pressure bearing cylinder and the structural design thereof enable the seismic source device to be put into a deep well of thousands of meters for triggering, and the seismic source device can be put into the deep well for earthquake besides the earthquake on the ground, and can replace a gunpowder seismic source no matter on the ground or in the underground; safe and reliable, avoids explosive and solves the problem of seismic source.)

1. A thermal expansion bearable hydraulic deep well seismic source device is characterized in that: the high-temperature-resistant cable mainly comprises an upper connector (5), a tail connector (1), an ignition cable (6), a thermal expansion agent (7), a pressing ring (4), a shear sheet (3), a sealing ring (14) is arranged in the pressure bearing cylinder (1) after the upper connector (5) and the pressure bearing cylinder (1) are connected through threads, the thermal expansion agent is sealed by the sealing ring (14) in the pressure bearing cylinder (1), the ignition cable (6) penetrates through a center hole (15) and is arranged, And a sealing ring IV (13) is used for sealing, a first hole 8 along the axial direction is arranged in the middle of the tail joint 2, a second hole 9 along the radial direction is arranged in the middle of the tail joint 2, and the first hole 8 along the axial direction is communicated with the second hole 9 along the radial direction.

2. A thermally expansive hydraulic deep well seismic source apparatus according to claim 1, wherein: the thickness of the shear slice (3) is determined according to the pressure in the well and the amount of the thermal expansion agent in the pressure bearing cylinder (1).

3. A thermally expansive hydraulic deep well seismic source apparatus according to claim 1, wherein: the upper joint (5) is connected with a cable head (10), and the thermal expansion hydraulic deep well seismic source device is lowered into the well through a cable.

Technical Field

The invention relates to a seismic source device with thermal expansion capable of bearing high temperature and high pressure in a deep well, and belongs to the field of micro-seismic monitoring.

Background

The traditional seismic sources for geophysical exploration comprise a high-pressure air gun seismic source, a ground seismic source vehicle, a gunpowder explosion seismic source and the like, and most of the seismic sources can only be used on the ground; in the micro-earthquake, the underground gunpowder seismic source is generally used for position calibration, but the safety risk is involved, and the invention solves the safety problem by using the underground thermal expansion seismic source device to replace the underground gunpowder seismic source. Meanwhile, when the device is used as a ground seismic source, the cost is greatly saved compared with a high-pressure air gun, a seismic source vehicle, an explosion source and the like.

In order to solve the problems, a thermal expansion bearable hydraulic seismic source device in a deep well is developed, and the device is convenient to use, simple in structure, free of safety risk and capable of being triggered when being put into a well with the depth of thousands of meters.

Disclosure of Invention

The following technical scheme is adopted: a thermal expansion bearable hydraulic deep well seismic source device mainly comprises an upper joint, a pressure bearing cylinder, an ignition cable, a thermal expansion agent, a pressure ring, a shear slice, a tail joint, a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring, wherein the upper joint is connected with the pressure bearing cylinder through threads, and is sealed by a sealing ring I, a pressure-bearing cylinder is filled with thermal expansion agent, an ignition cable passes through a central hole of an upper joint and is placed in the expansion agent in the pressure-bearing cylinder, a tail joint is connected with the other end of the pressure-bearing cylinder through threads, the tail joint is sealed by a sealing ring II, a pressing ring is arranged in the tail joint close to the end of the pressure-bearing cylinder, the pressing ring presses the shear slice on the tail joint, the pressing ring, the tail joint and the shear slice are sealed by a sealing ring III and a sealing ring IV, a hole I along the axial direction is arranged in the middle of the tail joint, a hole II along the radial direction is arranged in the middle of the tail joint, and the hole I along the axial direction is communicated with the hole II along the radial direction.

The thickness of the shear slice is determined according to the pressure in the well and the amount of the thermal expansion agent in the pressure bearing cylinder.

The upper joint is connected with the cable head, the thermal expansion pressure-bearing seismic source is put into a well through the cable, then the ignition cable is electrified to ignite the thermal expansion agent, a large amount of high-temperature gas is released when the thermal expansion agent is combusted, high pressure is generated in the pressure-bearing cylinder, the high-pressure gas cuts off the shear slice, and the high-temperature gas is released through the hole I and the hole II of the tail joint to generate a vibration wave signal.

The invention has the beneficial effects that:

the pressure bearing cylinder and the structural design thereof enable the seismic source device to be placed into a deep well with the depth of thousands of meters for triggering, the seismic source device can be shocked on the ground, and can also be placed into the deep well through a cable for shocking, and the ground and the underground can both replace a gunpowder seismic source so as to avoid the safety risk of gunpowder use.

Drawings

FIG. 1 is a block diagram of a thermally expansive hydraulic deep well seismic source apparatus of the present invention.

Detailed Description

As shown in figure 1, the thermal expansion bearable hydraulic deep well seismic source device mainly comprises an upper joint 5, a pressure-bearing cylinder 1, an ignition cable 6, a thermal expansion agent 7, a pressure ring 4, a shearing sheet 3, a tail joint 2, a first sealing ring 14, a second sealing ring 11, a third sealing ring 12 and a fourth sealing ring 13, wherein the upper joint 5 is in threaded connection with the pressure-bearing cylinder 1 and is sealed by the first sealing ring 14, the thermal expansion agent is filled in the pressure-bearing cylinder 1, the ignition cable 6 penetrates through a central hole 15 of the upper joint 5 and is placed in the expansion agent in the pressure-bearing cylinder 1, the tail joint 2 is in threaded connection with the other end of the pressure-bearing cylinder 1 and is sealed by the second sealing ring 11, the end of the tail joint 2 close to the pressure-bearing cylinder 1 is internally provided with the pressure ring 4, the shearing sheet 3 is pressed on the tail joint 2 by the pressure ring 4, the tail joint 2 and the shearing sheet 3 are sealed by the third sealing ring 12 and the fourth, the middle part of the tail joint 2 is provided with a second radial hole 9, and a first axial hole 8 is communicated with the second radial hole 9.

The thickness of the shear slice 3 is determined according to the pressure in the well and the amount of the thermal expansion agent in the pressure-bearing cylinder 1.

The upper connector 5 is connected with a cable head 10, a thermal expansion pressure-bearing seismic source is put into a well through a cable, then an ignition cable 6 is electrified to ignite a thermal expansion agent, a large amount of high-temperature gas is released when the thermal expansion agent is combusted, high pressure is generated in the pressure-bearing cylinder 1, the high-pressure gas cuts off the shear blade 3, and the high-temperature gas is released through a hole I8 and a hole II 9 of the tail connector 2 to generate a vibration wave signal.

The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.