Multi-piston type oil pressure balancing device for oil well operation

Abstract

The utility model relates to the field of oil well operation, in particular to a multi-piston type oil pressure balancing device for oil well operation, which comprises a sampler body, a through flow guide hole is arranged at the central position inside the sampler body, and a plurality of piston holes are arranged at the middle position of the sampler body. A limiting seat is arranged at one end, close to the outer side of the sampler body, in each piston hole, a piston is arranged at one end, close to the flow guide hole, in each piston hole, a sealing ring is arranged on the outer side of the piston, and an oil guide hole communicated with the flow guide hole is formed in the bottom of each piston hole. A plurality of annularly distributed piston holes are formed in the outer side of the sampler body, and a moving piston is limited by a limiting seat on each piston hole, so that enough balance area is ensured.

Description

Technical Field

[0001] The utility model relates to the field of oil well operations, in particular to a multi-piston oil pressure balancing device used for oil well operations. Background Art

[0002] During the oil well sampling process, the oil well sampling device has a very high pressure and temperature inside the oil well. In order to ensure the sealing of the power oil and the volume expansion of the oil due to the increase in temperature, a balancing device is set. The balancing device in the prior art is generally a large piston (the axis of the large piston coincides with the axis of the sampler, and is sealed and connected along the left and right directions. One side of the large piston is the power oil and the other side is the well environment; the reason for setting the large piston is that the volume of the oil changes greatly, but it is basically incompressible, so the cross-sectional area of ​​the balancer is relatively large, so the piston is relatively large). Due to the sealing requirements, it is difficult to adjust the position of the large piston during the assembly process, and the operation is inconvenient. Utility Model Content

[0003] The purpose of the present utility model is to provide a multi-piston oil pressure balancing device for oil well operations in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A multi-piston oil pressure balancing device for oil well operations includes a sampler body, a through diversion hole is opened at the center position inside the sampler body, a plurality of piston holes are opened in the middle position of the sampler body, a limit seat is provided at the end of each piston hole close to the outside of the sampler body, a piston is provided at the end of each piston hole close to the diversion hole, a sealing ring is provided on the outside of the piston, and an oil guide hole connected to the diversion hole is opened at the bottom of the piston hole.

[0006] Preferably, the piston hole is provided with an internal thread at the position of the limiting seat, and the outer side of the limiting seat is provided with an external thread that matches the internal thread of the piston hole.

[0007] Preferably, a hexagonal hole for inserting a hexagonal wrench is provided on the limiting seat, and the hexagonal hole passes through the upper and lower ends of the limiting seat.

[0008] Preferably, an annular groove for mounting a sealing ring is provided at a middle position on the outer side of the piston, and a threaded blind hole is provided at one end of the piston away from the oil guide hole.

[0009] Preferably, the axes of the multiple piston holes are arranged along the radial direction of the sampler body to form hole rings, and the piston holes in two adjacent hole rings are staggered.

[0010] Preferably, the pistons are arranged in a "closest cubic packing" form along the unfolded plane of the sampler body.

[0011] Compared with the prior art, the beneficial effects are as follows: by arranging a plurality of annularly distributed piston holes on the outside of the sampler body, the limiting seat on each piston hole limits the moving piston, thereby ensuring sufficient balancing area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a structural schematic diagram of a multi-piston oil pressure balancing device for oil well operations described in the utility model;

[0014] Figure 2 This is a radial cross-sectional view of a multi-piston oil pressure balancing device for oil well operations according to the present invention;

[0015] Figure 3 This is an axial cross-sectional view of a multi-piston oil pressure balancing device for oil well operations according to the present invention;

[0016] Figure 4 This is a schematic diagram of the sealing ring structure of a multi-piston oil pressure balancing device for oil well operations described in the utility model;

[0017] Figure 5 This is a schematic diagram of the piston structure of a multi-piston oil pressure balancing device for oil well operations described in the utility model;

[0018] Figure 6 This is a schematic diagram of the limit seat structure of a multi-piston oil pressure balancing device for oil well operations described in the utility model;

[0019] Figure 7 This is a piston hole distribution diagram of a multi-piston oil pressure balancing device for oil well operations described in the utility model.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Sampler body; 2. Limit seat; 21. Hexagonal hole; 3. Piston; 31. Threaded blind hole; 4. Sealing ring; 5. Piston hole; 6. Oil guide hole; 7. Diversion hole. DETAILED DESCRIPTION

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figure 1-Figure 7 As shown, a multi-piston oil pressure balancing device for oil well operations includes a sampler body 1, a guide hole 7 is provided at the center position of the sampler body 1, and a plurality of piston holes 5 are provided in the middle position of the sampler body 1. The axes of the plurality of piston holes 5 are arranged along the radial direction of the sampler body 1 to form a hole ring, and the piston holes 5 in two adjacent hole rings are staggered. A limit seat 2 is provided at one end of each piston hole 5 close to the outside of the sampler body 1, a piston 3 is provided at one end of each piston hole 5 close to the guide hole 7, a sealing ring 4 is provided on the outside of the piston 3, and an oil guide hole 6 connected to the guide hole 7 is provided at the bottom of the piston hole 5.

[0025] In this embodiment: the piston hole 5 is provided with an internal thread at the position of the limit seat 2, and the outer side of the limit seat 2 is provided with an external thread that cooperates with the internal thread of the piston hole 5, and the limit seat 2 is provided with a hexagonal hole 21 for inserting a hexagonal wrench, and the hexagonal hole 21 runs through the upper and lower ends of the limit seat 2, so that the position of the piston 3 can be observed more conveniently and intuitively when assembling the sampler body 1.

[0026] In this embodiment, an annular groove for mounting a sealing ring 4 is provided in the middle of the outer side of the piston 3, a threaded blind hole 31 is provided at the end of the piston 3 away from the oil guide hole 6, and the piston 3 is arranged in the form of "closest cubic packing" along the unfolded plane of the sampler body 1, so that more sampler bodies 1 can be arranged in a smaller volume.

[0027] Working principle: When in use, first install the sealing ring 4 into the annular groove of the piston 3, and then screw the corresponding screw on the threaded blind hole 31 of the piston 3, and then put the piston 3 into the corresponding piston hole 5 of the sampler body 1 by holding the screw, and then unscrew the screw, and insert the hexagonal wrench into the hexagonal hole 21 of the limit seat 2, and then tighten the limit seat 2 to the internal thread of the piston hole 5, and then repeat the above operation to install the limit seat 2 and piston 3 in multiple piston holes 5 in turn, and then complete the assembly of the entire sampler body 1; then the assembled sampler body 1 can be installed to the corresponding position. In addition, when filling oil, the multiple pistons 3 of the first hole ring can be fit with the limit seat 2, and then the multiple pistons 3 in the second hole ring can be fit with the oil guide hole 6. When the oil filling is completed, the multiple oil guide holes 6 on the sampler body 1 are just in the middle position of the piston hole 5, which is convenient for adjusting the amount of oil added.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A multi-piston oil pressure balancing device for oil well operations, characterized by: The invention comprises a sampler body (1), wherein a through flow guide hole (7) is provided at the center position of the sampler body (1), a plurality of piston holes (5) are provided at the middle position of the sampler body (1), a limit seat (2) is provided at one end of each piston hole (5) close to the outside of the sampler body (1), a piston (3) is provided at one end of each piston hole (5) close to the flow guide hole (7), a sealing ring (4) is provided on the outside of the piston (3), and an oil guide hole (6) connected to the flow guide hole (7) is provided at the bottom of the piston hole (5).

2. The multi-piston oil pressure balancing device for oil well operations according to claim 1, characterized in that: The piston hole (5) is provided with an internal thread at a position of the limiting seat (2), and the outer side of the limiting seat (2) is provided with an external thread that matches the internal thread of the piston hole (5).

3. The multi-piston oil pressure balancing device for oil well operations according to claim 1, characterized in that: The limiting seat (2) is provided with a hexagonal hole (21) for inserting a hexagonal wrench, and the hexagonal hole (21) passes through the upper and lower ends of the limiting seat (2).

4. The multi-piston oil pressure balancing device for oil well operations according to claim 1, characterized in that: An annular groove for mounting the sealing ring (4) is provided at the middle position of the outer side of the piston (3), and a threaded blind hole (31) is provided at one end of the piston (3) away from the oil guide hole (6).

5. The multi-piston oil pressure balancing device for oil well operations according to claim 1, characterized in that: The axes of the plurality of piston holes (5) are arranged along the radial direction of the sampler body (1) to form a hole ring, and the piston holes (5) in two adjacent hole rings are staggered.

6. The multi-piston oil pressure balancing device for oil well operations according to claim 1, characterized in that: The piston (3) is arranged in a "closest cubic packing" form along the unfolding plane of the sampler body (1).

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