A reversing device for fracturing operation

Abstract

The present invention provides a reversing device for use in fracturing operations, comprising a body, a plug, a valve stem, a piston and a first handle. The plug is assembled in a cavity of the body, and a fracturing mixture inlet is provided at its top, and a first fracturing mixture outlet connected to the fracturing mixture inlet is provided at its side. The side of the body is provided with at least two groups of second fracturing mixture outlets that can be rotatably connected to the first fracturing mixture outlet. The piston is seal-connected to the bottom end of the body, and its internal thread is connected to the valve stem. One end of the valve stem extending into the body is threadedly connected to the bottom end of the plug, and the first handle is fixed to the end extending out of the body. The present invention reduces fluid leakage points, optimizes the overall structure, greatly reduces costs, is conducive to sealing, is simple to operate, and saves installation and maintenance time by integrating the traditional five-way valve and the gate valve into one.

Description

Technical Field

[0001] The invention relates to a reversing device, in particular to a reversing device used in fracturing operations. Background Art

[0002] There are often multiple wellhead operations at oil fields. During fracturing operations, the fracturing fluid is discharged through the high and low pressure manifolds and flows to each wellhead through the diversion device. The traditional diversion device usually consists of a five-way valve 100 and a flat gate valve 200 (such as Figure 1 and 2 When a wellhead is undergoing fracturing, the fracturing fluid enters the five-way cavity through the top of the five-way, the gate valve connected to the wellhead is opened, and the other outlet gate valves are closed to ensure that there is no leakage at the other outlets, and the fracturing operation of the wellhead can be completed. Based on the fact that the traditional diversion device has a large structure and a cumbersome operation process, a reversing device for fracturing operation is now disclosed. Summary of the invention

[0003] The purpose of the present invention is to provide a reversing device for fracturing operations, which reduces fluid leakage points by integrating the traditional five-way valve and the gate valve, optimizes the overall structure, greatly reduces costs, is conducive to sealing, is simple to operate, and saves installation and maintenance time.

[0004] The present invention provides the following technical solutions:

[0005] A reversing device for use in fracturing operations comprises a body, a plug, a valve stem, a piston and a first handle. The plug is assembled in a cavity of the body, and a fracturing mixture inlet is provided at its top, and a first fracturing mixture outlet communicated with the fracturing mixture inlet is provided at its side. The side of the body is provided with at least two groups of second fracturing mixture outlets that can be rotatably connected with the first fracturing mixture outlets. The piston is sealingly connected to the bottom end of the body, and its internal thread is connected to the valve stem. One end of the valve stem extending into the body is threadedly connected to the bottom end of the plug, and the first handle is fixed to the end extending out of the body.

[0006] Preferably, four groups of second fracturing mixture outlets are provided and are evenly distributed on the side of the body.

[0007] Preferably, the plug includes a middle part of the plug with a tapered outer wall, and the middle part of the plug is arranged in a tapered hole in the body, and a dovetail groove matching the second fracturing mixture outlet is also provided on the outer wall of the middle part of the plug, and a first sealing ring is provided in the dovetail groove, which is squeezed between the body outside the second fracturing mixture outlet and the side wall of the middle part of the plug.

[0008] Preferably, the plug also includes an upper plug portion arranged above the middle portion of the plug and a lower plug portion arranged below the middle portion of the plug, a second sealing ring is also provided between the body and the upper plug portion and the lower plug portion, an annular groove is provided in the middle portion of one side of the second sealing ring close to the body, and an injection hole is provided on the body that can be connected to the groove.

[0009] Preferably, the second sealing ring is a FS sealing ring.

[0010] Furthermore, it also includes a labor-saving mechanism, which includes a first pressure injection hole and a second pressure injection hole arranged on the main body, one end of the first pressure injection hole extending into the main body can be connected to a first gap formed between the bottom end of the plug and the main body, and one end of the second pressure injection hole extending into the main body can be connected to a second gap formed between the top end of the piston and the main body.

[0011] Preferably, the main body is further provided with two groups of cleaning holes which can communicate with the main body cavity.

[0012] Furthermore, it also includes a pressure ring and a second handle. The pressure ring is pressed tightly on the top of the upper part of the plug, and its outer side is threadedly connected to the body cavity. The second handle is connected to the top of the pressure ring by screws.

[0013] Preferably, the plug and the valve stem, as well as the valve stem and the piston are connected via a trapezoidal thread transmission connection.

[0014] Preferably, a third sealing ring is provided between the valve stem and the piston, between the valve stem and the body, and between the piston and the body.

[0015] The beneficial effects of the present invention are:

[0016] 1. By integrating the traditional five-way valve and the gate valve into one, the assembly structure of the body, the plug, the valve stem, the first handle and the piston is designed to optimize the overall structure, greatly reduce costs, reduce fluid leakage points, and facilitate sealing. The operation is relatively simple and the installation and maintenance time is saved.

[0017] 2. Trapezoidal transmission threads are used between the plug, valve stem and piston, which have high connection strength and strong load-bearing capacity.

[0018] 3. The upper and lower parts of the body are sealed with FS sealing rings, and sealing grease can be injected through the injection hole to assist sealing and increase sealing safety.

[0019] 4. By arranging the first sealing ring in the dovetail groove between the middle part of the tapered plug and the body, the gap can be easily adjusted and the tilting moment can be withstood, which can effectively prevent the sealing ring from failing due to extrusion deformation.

[0020] 5. The new reversing device is also equipped with a labor-saving mechanism, which injects hydraulic oil into the two pressure injection holes respectively. Under the action of hydraulic pressure, the handle can be easily operated to quickly connect the plug to the outlet.

[0021] 6. There are two cleaning holes on the main body. When the product is under maintenance, the residual pressure inside the cavity is released from the cleaning holes, and the cleaning liquid is injected from the cleaning holes to effectively remove sand, dust or other debris inside the device and improve the overall safety of the product.

[0022] 7. By setting a pressure ring and a second handle, when the plug needs to be rotated, the pressure ring can be driven by the second handle to rotate, so that space can be left for the plug to float, and when the plug is turned to the corresponding position, the pressure ring can be driven by the second handle to tighten and press the plug again, so as to prevent the plug from loosening and moving due to vibration when the reversing device is working at the fracturing site. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the structure of a traditional diversion device;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure connecting the wellhead;

[0026] Figure 3 It is a schematic diagram of the structure of the wellhead connected to the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the present invention;

[0028] Figure 5 is a cross-sectional view of the structure of the present invention;

[0029] Figure 6 yes Figure 5 Cross-sectional view in the KK direction;

[0030] Figure 7 It is the front view of the cock;

[0031] Figure 8 It is a top view of the cock;

[0032] Markings in the figure: 1 is the body, 2 is the plug, 3 is the valve stem, 4 is the piston, 5 is the first handle, 6 is the fracturing mixture inlet, 7 is the second fracturing mixture outlet, 8 is the dovetail groove, 9 is the first fracturing mixture outlet, 10 is the second sealing ring, 11 is the injection hole, 12 is the first pressure injection hole, 13 is the second pressure injection hole, 14 is the cleaning hole, 15 is the pressure ring, 16 is the second handle, 201 is the middle part of the plug, 202 is the upper part of the plug, and 203 is the lower part of the plug. DETAILED DESCRIPTION

[0033] Combination Figures 1 to 8 A reversing device for use in fracturing operations is shown, in this embodiment, comprising a body 1, a plug 2, a valve stem 3, a piston 4 and a first handle 5. The plug 2 is assembled in the cavity of the body 1, and a fracturing mixture inlet 6 is provided at its top, and a first fracturing mixture outlet 9 connected to the fracturing mixture inlet 6 is provided at its side, and at least two groups of second fracturing mixture outlets 7 rotatably connected to the first fracturing mixture outlet 9 are provided at the side of the body 1. The piston 4 is sealingly connected to the bottom end of the body 1, and its internal thread is connected to the valve stem 3, the end of the valve stem 3 extending into the body 1 is threadedly connected to the bottom end of the plug 2, and the end extending out of the body 1 is fixed with the first handle 5.

[0034] Four groups of second fracturing mixture outlets 7 are arranged and evenly distributed on the side of the body 1 , and can be used for four wellhead operations, thereby improving the efficiency of oilfield operations.

[0035] The plug 2 includes a plug middle part 201 with a tapered outer wall, and the plug middle part 201 is arranged in the tapered hole in the body 1. A dovetail groove 8 is also provided on the outer wall of the plug middle part to cooperate with the second fracturing mixture outlet 7. A first sealing ring is provided in the dovetail groove 8, which is squeezed between the body 1 outside the second fracturing mixture outlet 7 and the side wall of the plug middle part, so as to achieve the effect of easy adjustment of the gap, withstand the tilting moment, and effectively prevent the sealing ring from failing due to extrusion deformation.

[0036] The plug 2 also includes an upper plug part 202 arranged above the middle part 201 of the plug and a lower plug part 203 arranged below the middle part 201 of the plug. A second sealing ring 10 is also arranged between the main body 1 and the upper plug part 202 and the lower plug part 203. The second sealing ring 10 is provided with an annular groove in the middle part of one side close to the main body 1. The main body 1 is provided with an injection hole 11 that can be connected to the groove. The second sealing ring 10 is a FS sealing ring, so that sealing grease can be injected through the injection hole 11 to assist sealing and increase sealing safety.

[0037] The reversing device used in fracturing operation also includes a labor-saving mechanism, which includes a first pressure injection hole 12 and a second pressure injection hole 13 arranged on the main body 1. The end of the first pressure injection hole 12 extending into the main body 1 can be communicated with a first gap formed between the bottom end of the plug 2 and the main body 1, and the end of the second pressure injection hole 13 extending into the main body 1 can be communicated with a second gap formed between the top end of the piston 4 and the main body 1. By injecting hydraulic oil into the first pressure injection hole 12 and the second pressure injection hole 13, the handle can be easily operated under the action of hydraulic pressure to quickly connect the plug 2 with the second fracturing mixture outlet 7, and butter can also be injected into the main body 1, which can not only play a lubricating role and reduce the friction generated when the plug 2 rotates, but also play an auxiliary role in the overall sealing of the cavity.

[0038] The main body 1 is also provided with two groups of cleaning holes 14 which can be connected to the cavity of the main body 1, and the main body 1 is also connected with a plug which blocks the injection hole 11, the first pressure injection hole 12, the second pressure injection hole 13 and the cleaning hole 14. When the product is under maintenance, the residual pressure inside the cavity is released from the cleaning hole 14, and the cleaning liquid is injected from the cleaning hole 14 to effectively remove sand and dust or other debris inside the device, thereby improving the overall safety of the product.

[0039] The reversing device used in the fracturing operation also includes a pressure ring 15 and a second handle 16. The pressure ring 15 is pressed against the top of the upper part 202 of the plug, and its outer side is threadedly connected to the cavity of the body 1. The second handle 16 is connected to the top of the pressure ring 15 by a screw. When the plug 2 needs to be rotated, the pressure ring 15 can be driven by the second handle 16 to rotate, so that space can be left for the plug 2 to float. After the plug 2 is rotated to the corresponding position, the pressure ring 15 can be driven by the second handle 16 again to tighten and press the plug 2, so as to prevent the plug 2 from loosening and moving due to vibration when the reversing device is working at the fracturing site.

[0040] The plug 2 and the valve stem 3 as well as the valve stem 3 and the piston 4 are connected through trapezoidal thread transmission.

[0041] A third sealing ring is provided between the valve stem 3 and the piston 4 , between the valve stem 3 and the body 1 , and between the piston 4 and the body 1 .

[0042] The working principle of the present invention is: when working, first determine the wellhead to be operated on site at the oil field, then rotate the first handle 5 to drive the valve stem 3 and the plug 2 to rotate to the outlet corresponding to the wellhead at the same time, and the fracturing mixture pumped out by the high and low pressure manifold group is pumped into the top of the new reversing device and flows into the wellhead.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reversing device for use in fracturing operations, characterized in that: It comprises a body, a plug, a valve stem, a piston and a first handle, wherein the plug is assembled in the cavity of the body, and a fracturing mixture inlet is arranged at the top thereof, and a first fracturing mixture outlet is arranged at the side thereof which is connected with the fracturing mixture inlet, and at least two groups of second fracturing mixture outlets which can be rotatably connected with the first fracturing mixture outlets are arranged at the side of the body, the piston is sealingly connected to the bottom end of the body, and its internal thread is connected with the valve stem, one end of the valve stem extending into the body is threadedly connected with the bottom end of the plug, and the first handle is fixed to one end extending out of the body; The plug includes a plug middle portion with a tapered outer wall, and the plug middle portion is disposed in a tapered hole in the body, a dovetail groove matching the second fracturing mixture outlet is also provided on the outer wall of the plug middle portion, and a first sealing ring is provided in the dovetail groove between the body and the side wall of the plug middle portion and squeezed outside the second fracturing mixture outlet; It also includes a labor-saving mechanism, which includes a first pressure injection hole and a second pressure injection hole arranged on the main body, one end of the first pressure injection hole extending into the main body can be connected to a first gap formed between the bottom end of the plug and the main body, and one end of the second pressure injection hole extending into the main body can be connected to a second gap formed between the top end of the piston and the main body.

2. A reversing device for use in fracturing operations according to claim 1, characterized in that: The second fracturing mixture outlets are provided with four groups and are evenly distributed on the side of the body.

3. A reversing device for use in fracturing operations according to claim 2, characterized in that: The plug also includes an upper plug portion arranged above the middle portion of the plug and a lower plug portion arranged below the middle portion of the plug. A second sealing ring is also arranged between the body and the upper plug portion and the lower plug portion. An annular groove is arranged in the middle portion of one side of the second sealing ring close to the body, and an injection hole that can be connected to the groove is arranged on the body.

4. A reversing device for use in fracturing operations according to claim 3, characterized in that: The second sealing ring is a FS sealing ring.

5. A reversing device for use in fracturing operations according to claim 1, characterized in that: The body is also provided with two groups of cleaning holes which can be communicated with the body cavity.

6. A reversing device for use in fracturing operations according to claim 1, characterized in that: It also includes a pressure ring and a second handle. The pressure ring is pressed tightly on the top of the upper part of the plug, and its outer side is threadedly connected to the body cavity. The second handle is connected to the top of the pressure ring through screws.

7. A reversing device for use in fracturing operations according to claim 1, characterized in that: The plug and the valve stem, as well as the valve stem and the piston, are connected via trapezoidal thread transmission.

8. A reversing device for use in fracturing operations according to claim 1, characterized in that: A third sealing ring is provided between the valve stem and the piston, between the valve stem and the body, and between the piston and the body.

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