Novel ultrasonic blocking-removing and injection-increasing device

Abstract

The utility model discloses a novel ultrasonic plug-removing and injection-increasing device and relates to the technical field of oil extraction. A piezoelectric ceramic tube is installed in the protection tube, an inner hole of the protection tube is a conical hole with the diameter of the lower portion becoming larger, the piezoelectric ceramic tube is of a conical tube structure, the taper of the piezoelectric ceramic tube is the same as that of the protection tube, the upper end face of the lower connector abuts against the bottom face of the piezoelectric ceramic tube, and the lower connector does not make contact with the transverse end face of the protection tube. The utility model has the beneficial effects that the inner hole of the protective tube and the piezoelectric ceramic tube are made into a conical structure, the piezoelectric ceramic tube is assembled into the protective tube from the lower part, and when the lower joint is in threaded connection with the protective tube, the piezoelectric ceramic tube is moved upwards; the piezoelectric ceramic tube and the protection tube are tightly matched together, the transmission efficiency of ultrasonic waves is improved, and the blocking removal and injection increasing effects are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production, in particular to a novel ultrasonic blockage removal and injection device. Background Art

[0002] Currently, oilfield unblocking and injection devices use high-power ultrasonic transducers. Since the electroacoustic conversion material used is piezoelectric ceramics, which are brittle and easily damaged by knocks and impacts, most of them are suspended in a protective tube to avoid damage. Because the gap between the suspended ceramic string and the protective tube is filled with silicone oil, the sound velocity difference between the silicone oil and the protective tube is so great that the ultrasonic wave propagation efficiency of the piezoelectric ceramics is low during unblocking operations, resulting in poor unblocking and injection results.

[0003] Application number CN 108131117 A discloses a high-power ultrasonic transducer. By assembling the protective tube, piezoelectric ceramic, and piezoelectric ceramic positive electrode through interference fit, the obstruction of the intermediate medium is eliminated, significantly improving the efficiency of ultrasonic transmission.

[0004] However, the interference fit process requires striking parts, which can easily damage the piezoelectric ceramics and is not very practical. Utility Model Content

[0005] In order to solve the problems of low ultrasonic wave propagation efficiency and poor unblocking and injection-increasing effect in existing oilfield unblocking and injection-increasing devices, the utility model provides a novel ultrasonic unblocking and injection-increasing device.

[0006] The technical solution provided by the utility model is: a novel ultrasonic blockage removal and injection device, comprising a protective tube, the upper portion of the protective tube is threadedly sealed and connected to an upper joint, the upper portion of the upper joint is threadedly connected to a pressure cap, the pressure cap and the upper joint both have a center hole, the cable passes through the center holes of the pressure cap and the upper joint, a sealing ring is provided between the cable and the center hole of the upper joint, a conical countersunk hole with a large upper opening is provided at the upper end of the upper joint, a conical sleeve is installed in the conical countersunk hole, the conical sleeve has the same taper as the conical countersunk hole, the pressure cap is pressed on the upper end of the conical sleeve, and the conical sleeve has a cutting slit that passes through the pipe wall;

[0007] The lower part of the protection tube is connected to the lower joint through a thread, the outer circle of the lower part of the lower joint is connected to the lower protective cap through a thread, and a pressure balancing cap made of rubber is bonded to the inner side of the lower joint;

[0008] A piezoelectric ceramic tube is installed in the protective tube. The inner hole of the protective tube is a conical hole with a larger diameter at the lower part. The piezoelectric ceramic tube is made into a conical tube structure. The taper of the piezoelectric ceramic tube is the same as the taper of the protective tube. The upper end face of the lower joint is against the bottom face of the piezoelectric ceramic tube. The lower joint does not contact the lateral end face of the protective tube. A sealing gasket is sandwiched between the bottom of the protective tube and the lower joint. The cable has a wire electrically connected to the piezoelectric ceramic tube. The space inside the piezoelectric ceramic tube is filled with silicone oil.

[0009] A copper tube is installed in the inner hole of the piezoelectric ceramic tube. The copper tube is made into a conical tube structure. The taper of the copper tube is the same as that of the piezoelectric ceramic tube. The wire is electrically connected to the inner hole of the copper tube. A conical spring is installed in the inner hole of the copper tube. The taper of the conical spring is the same as that of the copper tube. The bottom of the conical spring is against the lower joint, and the conical spring is in a compressed state.

[0010] An elastic washer is sandwiched between the piezoelectric ceramic tube and the upper joint.

[0011] The roughness of the inner hole of the protection tube is between Ra0.4 and 0.8, and the roughness of the outer circle of the piezoelectric ceramic tube is between Ra0.4 and 0.8.

[0012] The beneficial effects of the utility model are as follows: the inner hole of the protective tube and the piezoelectric ceramic tube are made into a conical structure, the piezoelectric ceramic tube is assembled into the protective tube from the bottom, and when the lower joint is threadedly connected to the protective tube, the piezoelectric ceramic tube is moved upward. Since the piezoelectric ceramic tube and the protective tube are combined through the conical surface, the piezoelectric ceramic tube and the protective tube are tightly fitted together, thereby improving the transmission efficiency of ultrasonic waves and improving the effect of unblocking and increasing injection. The two are processed into a smooth contact surface, the microscopic contact area is larger, and the ultrasonic transmission efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attachment Figure 1 It is a structural diagram of the present utility model.

[0014] In the figure, 1-protective tube, 2-piezoelectric ceramic tube, 3-lower joint, 4-pressure balance cap, 5-lower protective cap, 6-upper joint, 7-sealing gasket, 8-pressure cap, 9-cable, 10-elastic washer, 11-copper tube, 12-conical spring, 13-wire, 14-conical sleeve. DETAILED DESCRIPTION

[0015] like Figure 1As shown, a novel ultrasonic plugging removal and injection device includes a protective tube 1, the upper portion of the protective tube 1 is threadedly sealed and connected to an upper joint 6, the upper portion of the upper joint 6 is threadedly connected to a pressure cap 8, both the pressure cap 8 and the upper joint 6 have a center hole, a cable 9 passes through the center holes of the pressure cap 8 and the upper joint 6, a sealing ring is provided between the cable 9 and the center hole of the upper joint 6, a conical countersunk hole with a large upper opening is provided at the upper end of the upper joint 6, a conical sleeve 14 is installed in the conical countersunk hole, the conical sleeve 14 has the same taper as the conical countersunk hole, the pressure cap 8 is pressed on the upper end of the conical sleeve 14, and the conical sleeve 14 has a cutting slit that runs through the pipe wall from top to bottom;

[0016] The lower part of the protection tube 1 is threadedly connected to the lower joint 3, the lower outer circle of the lower joint 3 is threadedly connected to the lower protective cap 5, and a pressure balancing cap 4 made of rubber is bonded to the inner side of the lower joint 3;

[0017] A piezoelectric ceramic tube 2 is installed in the protective tube 1. The inner hole of the protective tube 1 is a conical hole with a larger diameter at the lower part. The piezoelectric ceramic tube 2 is made into a conical tube structure. The taper of the piezoelectric ceramic tube 2 is the same as that of the protective tube 1. The upper end face of the lower joint 3 is against the bottom face of the piezoelectric ceramic tube 2. The lower joint 3 does not contact the lateral end face of the protective tube 1. A sealing gasket 7 is sandwiched between the bottom of the protective tube 1 and the lower joint 3. The cable 9 has a wire 13 electrically connected to the piezoelectric ceramic tube 2. The space inside the piezoelectric ceramic tube 2 is filled with silicone oil.

[0018] The inner hole of the protection tube 1 and the piezoelectric ceramic tube 2 are made into a conical structure. The piezoelectric ceramic tube 2 is assembled into the protection tube 1 from the bottom. When the lower joint 3 is threadedly connected to the protection tube 1, the piezoelectric ceramic tube 2 is moved upward. Since the piezoelectric ceramic tube 2 and the protection tube 1 are combined through the conical surface, the piezoelectric ceramic tube 2 and the protection tube 1 are tightly fitted together, thereby improving the transmission efficiency of ultrasonic waves and improving the deblocking and injection effect.

[0019] A copper tube 11 is installed in the inner hole of the piezoelectric ceramic tube 2. The copper tube 11 is made into a conical tube structure. The taper of the copper tube 11 is the same as that of the piezoelectric ceramic tube 2. The wire 13 is electrically connected to the inner hole of the copper tube 11. A conical spring 12 is installed in the inner hole of the copper tube 11. The taper of the conical spring 12 is the same as that of the copper tube 11. The bottom of the conical spring 12 is against the lower joint 3. The conical spring 12 is in a compressed state. The conical spring 12 lifts the copper tube 11 and tightly adheres to the inner hole of the piezoelectric ceramic tube 2, with high conductive efficiency.

[0020] An elastic washer 10 is sandwiched between the piezoelectric ceramic tube 2 and the upper connector 6 to provide vibration isolation.

[0021] The roughness of the inner hole of the protection tube 1 is between Ra0.4 and 0.8, and the roughness of the outer circle of the piezoelectric ceramic tube 2 is between Ra0.4 and 0.8. The contact area between the two at the microscopic level is larger, further improving the transmission efficiency of ultrasonic waves.

Claims

1. A novel ultrasonic blockage removal and injection device, comprising a protective tube (1), characterized in that: The upper part of the protective tube (1) is threadedly connected to the upper joint (6), and the upper part of the upper joint (6) is threadedly connected to the pressure cap (8). Both the pressure cap (8) and the upper joint (6) have a center hole. The cable (9) passes through the center holes of the pressure cap (8) and the upper joint (6). A sealing ring is provided between the cable (9) and the center hole of the upper joint (6). The upper end of the upper joint (6) is provided with a conical countersunk hole with a large upper opening. A conical sleeve (14) is installed in the conical countersunk hole. The conical sleeve (14) has the same taper as the conical countersunk hole. The pressure cap (8) is pressed on the upper end of the conical sleeve (14). The conical sleeve (14) has a cutting seam that passes through the pipe wall. The lower portion of the protection tube (1) is threadedly connected to the lower joint (3), the lower outer circle of the lower joint (3) is threadedly connected to the lower protective cap (5), and a pressure balancing cap (4) made of rubber is bonded to the inner side of the lower joint (3); A piezoelectric ceramic tube (2) is installed in the protective tube (1). The inner hole of the protective tube (1) is a conical hole with a larger diameter at the bottom. The piezoelectric ceramic tube (2) is made into a conical tube structure. The taper of the piezoelectric ceramic tube (2) is the same as the taper of the protective tube (1). The upper end face of the lower joint (3) is pressed against the bottom face of the piezoelectric ceramic tube (2). The lower joint (3) does not contact the transverse end face of the protective tube (1). A sealing gasket (7) is sandwiched between the bottom of the protective tube (1) and the lower joint (3). The cable (9) has a wire (13) electrically connected to the piezoelectric ceramic tube (2). The inner space of the piezoelectric ceramic tube (2) is filled with silicone oil.

2. The novel ultrasonic blockage removal and injection device according to claim 1 is characterized in that: A copper tube (11) is installed in the inner hole of the piezoelectric ceramic tube (2). The copper tube (11) is made into a conical tube structure. The taper of the copper tube (11) is the same as the taper of the piezoelectric ceramic tube (2). A wire (13) is electrically connected to the inner hole of the copper tube (11). A conical spring (12) is installed in the inner hole of the copper tube (11). The taper of the conical spring (12) is the same as the taper of the copper tube (11). The bottom of the conical spring (12) is pressed against the lower joint (3), and the conical spring (12) is in a compressed state.

3. The novel ultrasonic blockage removal and injection device according to claim 1 is characterized in that: An elastic washer (10) is sandwiched between the piezoelectric ceramic tube (2) and the upper joint (6).

4. The novel ultrasonic blockage removal and injection device according to claim 1 is characterized in that: The roughness of the inner hole of the protection tube (1) is between Ra0.4 and 0.8, and the roughness of the outer circle of the piezoelectric ceramic tube (2) is between Ra0.4 and 0.8.

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