Hydraulic type torsion seismic source vibrator

Abstract

The invention relates to a hydraulic type torsion seismic source vibrator which is composed of a flat plate, a stand column, a heavy hammer, a piston rod, an upper seal, a lower seal and a top plate. Conical and spherical teeth are mounted at the bottom of the flat plate; the upright is fixedly connected with the flat plate; the heavy hammer is matched with the piston rod; the upper seal and the lower seal are respectively matched with the piston rod and cannot rotate relatively; the heavy hammer is respectively matched with the upper seal and the lower seal and can rotate relatively; the top plate is fixedly connected with the columns. Different oil inlet holes are selected for oil feeding, so that the heavy hammer rotates around the piston rod in a reciprocating mode, reaction torque is generated and transmitted to the piston rod at the same time, then the reaction torque is transmitted to the ground through the flat plate connected with the piston rod, and therefore torsion excitation is achieved.

Description

Technical Field

[0001] The invention relates to the field of geophysical exploration equipment, and in particular to a hydraulic torsional source vibrator. Background Art

[0002] In recent years, my country's demand for oil and gas resources has shown a significant growth trend, and there is an urgent need to increase exploration and development efforts. However, the objects of oil and gas exploration are becoming increasingly complex, shifting from conventional oil and gas resource exploration to unconventional oil and gas resource exploration, and from medium-deep oil and gas resource exploration to deep and ultra-deep oil and gas resource exploration. The complex structures of unconventional oil and gas reservoirs and deep and ultra-deep oil and gas reservoirs have put forward higher requirements for exploration equipment.

[0003] As the main equipment for oil and gas exploration, controllable vibrators have the advantages of controllable excitation energy, controllable excitation frequency, high construction efficiency, and green environmental protection. As the objects of oil and gas exploration become increasingly complex, whether complex oil and gas reservoirs can be discovered also depends to a certain extent on the performance of exploration equipment. Continuously improving the exploration capabilities of controllable vibrator equipment has always been the pursuit of the industry. Compared with longitudinal waves and shear waves, torsional excitation waves have higher exploration accuracy, better imaging effects, and stronger anti-interference capabilities. At present, shear wave controllable vibrators and longitudinal wave controllable vibrators have been industrialized, while the development of torsional vibrators is still in its early stages, and there are currently no torsional vibrators for industrial applications.

[0004] To this end, the present invention proposes a hydraulic torsional source vibrator to provide a reliable torsional excitation method. Summary of the invention

[0005] The present invention is to meet the exploration needs of complex oil and gas reservoirs, provide a stable and reliable torsional excitation wave excitation source, and design a hydraulic torsional source vibrator.

[0006] To achieve the above-mentioned purpose, the present invention provides a hydraulic torsional source vibrator, including a plate, a column, a piston rod, a weight, a lower seal, an upper seal, and a top plate; the outer ring below the plate is equipped with an annular hemispherical tooth, and the inner ring is equipped with an annular conical tooth, which is conducive to torsional excitation; the plate is fixedly connected to the column; the piston rod cooperates with the weight, and the weight can rotate around the piston rod; two symmetrical wing plates are arranged on the outside of the piston rod, and two oil inlet holes are arranged on the top, each oil inlet hole is connected to a pair of oil outlet holes under the wing plates on both sides; two wing plates are also arranged inside the weight, which cooperate with the wing plates of the piston rod; the lower seal cooperates with the weight and can rotate relative to each other; the lower seal cooperates with the piston rod and cannot rotate relative to each other; the lower seal is an open hole sealing cover; the upper seal cooperates with the weight and can rotate relative to each other; the upper seal cooperates with the piston rod and cannot rotate relative to each other; the upper seal is an open hole sealing cover; the top plate is fixedly connected to the column.

[0007] When the present invention is working, hydraulic oil is injected into an oil inlet hole at the upper end of the piston rod, thereby pushing the weight to reciprocate around the piston rod, while generating a counter torque which is transmitted to the piston rod and then transmitted to the earth through a plate connected to the piston rod, thereby generating a torsional excitation wave signal.

[0008] The present invention has the following advantages:

[0009] 1. The present invention adopts a reciprocating torsion structure, which can generate torsion excitation wave signals in a reciprocating cycle.

[0010] 2. The flat plate proposed in the present invention enables the device to be more stably coupled to the ground, which is conducive to torsional excitation, improves the stability of the device, and enhances the excitation effect.

[0011] 3. The torque generated by the present invention is large, the excitation signal is reliable, and the anti-interference ability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the hydraulic torsional source vibrator of the present invention (front view).

[0013] Figure 2 It is a schematic diagram of the flat plate structure of the hydraulic torsional source vibrator of the present invention.

[0014] Figure 3 It is a front view of a schematic diagram of a piston rod of a hydraulic torsional source vibrator of the present invention.

[0015] Figure 4 It is a rear view of a schematic diagram of a piston rod of the hydraulic torsional source vibrator of the present invention.

[0016] Figure 5 It is a perspective view of a top view of a piston rod of a hydraulic torsional source vibrator of the present invention.

[0017] Figure 6 It is a top view of a schematic diagram of the cooperation between the piston rod and the weight of the hydraulic torsional source vibrator of the present invention.

[0018] Figure 7 It is a left view of the front cross-sectional view of the piston rod of the hydraulic torsional source vibrator of the present invention.

[0019] In the figure: 1. flat plate, 2. column, 3. weight, 4. upper seal, 5. top plate, 6. piston rod, 7. lower seal, 8. left wing plate of shaft, 9. right wing plate of shaft, 10. front wing plate of weight, 11. rear wing plate of weight, 100. oil inlet hole A, 101. oil outlet hole C at the upper end of the right wing plate 9 of shaft, 102. oil outlet hole D at the upper end of the left wing plate 8 of shaft, 200. oil inlet hole B, 201. oil outlet hole E at the lower end of the left wing plate 8 of shaft, 202. oil outlet hole F at the lower end of the right wing plate 9 of shaft. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figures 1 to 7 As shown, a hydraulic torsional source vibrator of the present invention comprises a plate 1, a column 2, a weight 3, an upper seal 4, a top plate 5, a piston rod 6, a lower seal 7, a shaft left wing plate 8, a shaft right wing plate 9, a weight front wing plate 10, a weight rear wing plate 11, an oil inlet hole A100, an oil outlet hole C101 at the upper end of the shaft right wing plate 9, an oil outlet hole D102 at the upper end of the shaft left wing plate 8, an oil inlet hole B200, an oil outlet hole E201 at the lower end of the shaft left wing plate 8, and an oil outlet hole F202 at the lower end of the shaft right wing plate 9; the plate 1 is a disc-shaped structure, and two annular hemispherical teeth are installed on the outer ring of the bottom of the plate 1, and one annular conical tooth is installed on the inner ring, which is conducive to torsional excitation; the column 2 is fixedly connected to the plate 1 to improve the stability of the device; the weight front wing plate 10 and the weight 3 of the weight 3 The hammer rear wing plate 11 is cross-matched with the shaft left wing plate 8 and the shaft right wing plate 9 of the piston rod 6; the weight hammer front wing plate 10, the weight hammer rear wing plate 11, the shaft left wing plate 8, and the shaft right wing plate 9 have the same size and shape, and cooperate to form 4 identical cavities; the weight hammer front wing plate 10 and the shaft left wing plate 8 are cavity one, the weight hammer rear wing plate 11 and the shaft left wing plate 8 are cavity two, the weight hammer rear wing plate 11 and the shaft right wing plate 9 are cavity three, and the weight hammer front wing plate 10 and the shaft right wing plate 9 are cavity four; the piston rod 6 is provided with oil inlet holes A100 and B200 inside, and the shaft left wing plate 8 and the shaft right wing plate 9 are provided outside; the oil outlet hole C101 at the upper end of the shaft right wing plate 9 and the oil outlet hole D102 at the upper end of the shaft left wing plate 8 are a pair of oil outlet holes, and the oil outlet hole E100 at the lower end of the shaft left wing plate 8 is a pair of oil outlet holes. 201 and the oil outlet hole F202 at the lower end of the right wing plate 9 of the shaft are another pair of oil outlet holes; the oil outlet hole C101 at the upper end of the right wing plate 9 and the oil outlet hole D102 at the upper end of the left wing plate 8 of the shaft are both connected to the oil inlet hole A100, and the oil outlet hole E201 at the lower end of the left wing plate 8 and the oil outlet hole F202 at the lower end of the right wing plate 9 of the shaft are both connected to the oil inlet hole B200; by selecting different oil inlet holes, the relative rotation direction of the weight 3 and the piston rod 6 can be controlled to generate torques in different directions; the lower seal 7 cooperates with the piston rod 6 and cannot rotate relative to each other; the lower seal 7 cooperates with the weight 3 and can rotate relative to each other; the upper seal 4 cooperates with the piston rod 6 and cannot rotate relative to each other; the upper seal 4 cooperates with the weight 3 and can rotate relative to each other; the top plate 5 is fixedly connected to the column 2 to improve the overall stability of the device.

[0022] The working principle of this example is as follows: when the present invention is working, the oil inlet hole A100 is first selected to enter the hydraulic oil, and the hydraulic oil flows out from the oil outlet hole C101 at the upper end of the right wing plate 9 of the shaft and the oil outlet hole D102 at the upper end of the left wing plate 8 of the shaft respectively, thereby entering cavity one and cavity three, generating pressure on the surface of the front wing plate 10 and the rear wing plate 11 of the heavy hammer, pushing the heavy hammer 3 to rotate clockwise, and at the same time, the hydraulic oil generates a torsional moment of equal magnitude and opposite direction on the shaft left wing plate 8 and the shaft right wing plate 9 of the piston rod 6, which is transmitted to the earth through the flat plate 1 connected to the piston rod 6. During this period, cavity two and cavity four are squeezed, so that the hydraulic oil in cavity two and cavity four flows out from the oil outlet hole E201 at the lower end of the shaft left wing plate 8 and the oil outlet hole F202 at the lower end of the shaft right wing plate 9 through the oil inlet hole B200; when the hydraulic oil enters from the oil inlet hole B200 , the hydraulic oil flows out from the oil outlet hole E201 at the lower end of the left wing plate 8 and the oil outlet hole F202 at the lower end of the right wing plate 9, respectively, and then enters the cavity two and the cavity four, generating pressure on the surface of the front wing plate 10 and the rear wing plate 11 of the heavy hammer, pushing the heavy hammer 3 to rotate counterclockwise, and at the same time, the hydraulic oil generates a torsional moment of equal magnitude and opposite direction on the left wing plate 8 and the right wing plate 9 of the piston rod 6, which is transmitted to the earth through the flat plate 1 connected to the piston rod 6. During this period, cavity one and cavity three are squeezed, so that the hydraulic oil in cavity one and cavity three flows out from the oil outlet hole C101 at the upper end of the right wing plate 9 and the oil outlet hole D102 at the upper end of the left wing plate 8 through the oil inlet hole A100; in this way, the oil inlet hole A100 and the oil inlet hole B200 are alternately filled with oil, thereby realizing a circulating work, generating a torsional moment on the earth, thereby realizing torsional excitation.

Claims

1. A hydraulic torsional source vibrator, comprising a plate (1), a column (2), a weight (3), an upper seal (4), a top plate (5), a piston rod (6), and a lower seal (7), characterized in that: The flat plate (1) is fixedly connected to the column (2); spherical and conical teeth are installed below the flat plate (1).

2. A hydraulic torsional source vibrator according to claim 1, characterized in that: The piston rod (6) is provided with an oil inlet hole (A100) and an oil inlet hole (B200) inside, and a shaft left wing plate (8) and a shaft right wing plate (9) outside; the oil outlet hole (C101) at the upper end of the shaft right wing plate (9) and the oil outlet hole (D102) at the upper end of the shaft left wing plate (8) form a pair of oil outlet holes, and the oil outlet hole (E201) at the lower end of the shaft left wing plate (8) and the oil outlet hole (F202) at the lower end of the shaft right wing plate (9) form another pair of oil outlet holes; the oil outlet hole (C101) at the upper end of the shaft right wing plate (9) and the oil outlet hole (D102) at the upper end of the shaft left wing plate (8) are both in communication with the oil inlet hole (A100), and the oil outlet hole (E201) at the lower end of the shaft left wing plate (8) and the oil outlet hole (F202) at the lower end of the shaft right wing plate (9) are both in communication with the oil inlet hole (B200).

3. A hydraulic torsional source vibrator according to claim 1, characterized in that: The weight (3) is provided with a weight front wing plate (10) and a weight rear wing plate (11); the weight (3) and the piston rod (6) are matched in a cross shape to form four identical cavities.

4. A hydraulic torsional source vibrator according to claim 1, characterized in that: The lower seal (7) cooperates with the piston rod (6) and cannot rotate relative to each other; the lower seal (7) cooperates with the weight (3) and can rotate relative to each other; the upper seal (4) cooperates with the piston rod (6) and cannot rotate relative to each other; the upper seal (4) cooperates with the weight (3) and can rotate relative to each other.

5. A hydraulic torsional source vibrator as claimed in claim 4, characterized in that: The weight (3) can reciprocate around the overall structure of the piston rod (6), the upper seal (4) and the lower seal (7), thereby cyclically generating a torsional moment.

6. A hydraulic torsional source vibrator according to claim 1, characterized in that: The top plate (5) is fixedly connected to the piston rod (6); the flat plate (1) is fixedly connected to the piston rod (6); the piston rod (6) transmits the torsional moment to the earth through the flat plate (1), thereby generating a torsional moment on the earth, thereby achieving torsional excitation.

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