Thermal expansion liquid pressure bearing deep well seismic source device

Abstract

The present application relates to a kind of hydraulic pressure deep well source device of thermal expansion, which is mainly composed of upper joint, pressure cylinder, ignition fuse, thermal expansion agent, pressure ring, shear piece, tail joint and sealing ring.The upper joint and pressure cylinder are connected by thread, the pressure cylinder is filled with thermal expansion agent, the ignition fuse is placed in the expansion agent in the pressure cylinder through the center hole of the upper joint, the tail joint and the other end of the pressure cylinder are connected by thread and sealed by the sealing ring, the pressure ring is placed in the tail joint near the end of the pressure cylinder, the pressure ring presses the shear piece in the tail joint, and the pressure ring, the tail joint and the shear piece are sealed by the sealing ring.The pressure cylinder and its structure design make the source device can be lowered into deep well for triggering, in addition to ground can be seismic, it can also be lowered into deep well for seismic, whether on the ground or in the well, it can replace the dynamite source;It is safe and reliable, avoids explosives, and solves the source problem.

Description

TECHNICAL FIELD

[0001] The heat expansion source device capable of bearing high temperature and high pressure in a deep well belongs to the field of microseismic monitoring. BACKGROUND

[0002] Traditional geophysical exploration sources include high-pressure air gun sources, ground source vehicles and explosive sources, most of which can only be used on the ground; in microseismic, the position is usually calibrated by using an underground explosive source, but it involves safety risks, and the heat expansion source device used in the well solves the safety problem to replace the underground explosive source. Meanwhile, the device can greatly save costs when used as a ground source compared with high-pressure air guns, source vehicles and explosive sources.

[0003] To solve the above problems, a heat expansion source device capable of bearing liquid pressure in a deep well is developed, which is convenient to use, simple in structure, and has no safety risks, and can be lowered into a well of several thousand meters deep to trigger. SUMMARY

[0004] The following technical scheme is specifically adopted: a heat expansion source device capable of bearing liquid pressure in a deep well, mainly composed of an upper joint, a pressure-bearing cylinder, an ignition fuse, a heat expansion agent, a pressure ring, a shear piece, a tail joint and sealing rings one, two, three and four, the upper joint and the pressure-bearing cylinder are connected by threads and sealed by the sealing ring one, the heat expansion agent is loaded in the pressure-bearing cylinder, the ignition fuse is placed in the expansion agent in the pressure-bearing cylinder through the center hole of the upper joint, the tail joint and the other end of the pressure-bearing cylinder are connected by threads and sealed by the sealing ring two, the pressure ring is arranged on the inner part of the tail joint close to the pressure-bearing cylinder end, the pressure ring presses the shear piece on the tail joint, the pressure ring, the tail joint and the shear piece are sealed by the sealing ring three and the sealing ring four, the tail joint has an axial hole one in the middle and a radial hole two, and the axial hole one and the radial hole two are communicated.

[0005] The thickness of the shear piece is determined according to the pressure in the well and the amount of the heat expansion agent in the pressure-bearing cylinder.

[0006] The upper joint is connected with a cable head, the heat expansion source capable of bearing pressure is lowered into the well through the cable, then the ignition fuse is electrified to ignite the heat expansion agent, a large amount of high-temperature gas is released when the heat expansion agent burns, high pressure is generated in the pressure-bearing cylinder, the high-pressure gas cuts off the shear piece, and the high-pressure gas is released through the hole one and the hole two of the tail joint to generate a vibration wave signal.

[0007] The heat expansion source device capable of bearing liquid pressure in a deep well has the following advantages:

[0008] Due to the pressure-bearing cylinder and its structural design, the source device can be lowered into a deep well of several kilometers deep to trigger, in addition to being able to shock on the ground, it can also be lowered into a deep well through a cable to shock, and it can replace the explosive source on the ground and in the well to avoid the safety risks of using explosives. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a structure diagram of a heat expansion liquid pressure bearing deep well seismic source device. DETAILED DESCRIPTION

[0010] As Figure 1 shown, a heat expansion liquid pressure bearing deep well seismic source device mainly consists of an upper joint 5, a pressure bearing cylinder 1, an ignition fuse 6, a heat expansion agent 7, a pressure ring 4, a shear piece 3, a tail joint 2, a sealing ring 1 4, a sealing ring 2 11, a sealing ring 3 12, and a sealing ring 4 13. The upper joint 5 and the pressure bearing cylinder 1 are connected by threads and sealed by the sealing ring 1 4. The heat expansion agent is loaded in the pressure bearing cylinder 1. The ignition fuse 6 is placed in the expansion agent in the pressure bearing cylinder 1 through the center hole 15 of the upper joint 5. The tail joint 2 and the other end of the pressure bearing cylinder 1 are connected by threads and sealed by the sealing ring 2 11. The tail joint 2 has the pressure ring 4 inside the end close to the pressure bearing cylinder 1. The pressure ring 4 presses the shear piece 3 on the tail joint 2. The pressure ring 4, the tail joint 2, and the shear piece 3 are sealed by the sealing ring 3 12 and the sealing ring 4 13. The tail joint 2 has an axial hole 1 8 in the middle and a radial hole 2 9 in the middle. The axial hole 1 8 and the radial hole 2 9 are communicated.

[0011] The thickness of the shear piece 3 is determined according to the pressure in the well and the amount of the heat expansion agent in the pressure bearing cylinder 1.

[0012] The upper joint 5 is connected with the cable head 10. The heat expansion liquid pressure bearing seismic source is lowered into the well through the cable. Then the ignition fuse 6 is electrified to ignite the heat expansion agent. A large amount of high-temperature gas is released when the heat expansion agent burns, generating high pressure in the pressure bearing cylinder 1. The high-pressure gas cuts off the shear piece 3, which is released through the hole 1 8 and the hole 2 9 of the tail joint 2, generating a vibration wave signal.

[0013] The above describes the preferred embodiment of the present application and the technical principles used. Any equivalent transformation, simple replacement, and other obvious changes based on the technical solutions of the present application without departing from the spirit and scope of the present application are within the protection scope of the present application.

Claims

1. A thermally expandable hydraulic deep well seismic source device, characterized in that... : Mainly by the upper joint (5), pressure cylinder (1), ignition cord (6), thermal expansion agent (7), pressure ring (4), shear piece (3), tail joint (2) and sealing ring one (14), sealing ring two (11), sealing ring three (12), sealing ring four (13) are composed of, the upper joint (5) and pressure cylinder (1) are connected by thread, and are sealed by sealing ring one (14), pressure cylinder (1) is loaded with thermal expansion agent, ignition cord (6) is placed in the expansion agent in pressure cylinder (1) through the center hole (15) of upper joint (5), tail joint (2) and the other end of pressure cylinder (1) are connected by thread, and are sealed by sealing ring two (11), the tail joint (2) is close to the inside of pressure cylinder (1) end and has pressure ring (4), the pressure ring (4) is pressed on the tail joint (2) by shear piece (3), the pressure ring (4) and tail joint (2) and shear piece (3) are sealed by sealing ring three (12), sealing ring four (13), the tail joint (2) has the hole one (8) along the axial direction in the middle, the tail joint (2) has the hole two (9) along the radial direction in the middle, the hole one (8) along the axial direction and the hole two (9) along the radial direction are communicated;The thickness of the shear piece (3) is determined according to the pressure in the well and the amount of thermal expansion agent in pressure cylinder (1);The upper joint (5) is connected with cable head (10), and the heat expansion liquid pressure deep well seismic source device is lowered into the well through the cable.

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