Wellhead back pressure control device for oil exploitation

Abstract

The utility model relates to the technical field of oil exploitation equipment components, and discloses an oil exploitation wellhead back pressure control device which comprises a valve body external mechanism, a valve element component is rotatably installed on the inner side of the valve body external mechanism, the valve body external mechanism and the valve element component are made of hard alloy materials, and the valve body external mechanism comprises a valve seat. The two ends of the inner side wall of the valve seat are each provided with an assembly hole, and a first sealing bearing is rotationally installed in the assembly hole in one end. The reinforced durable valve body structural design is adopted, the valve element and the valve seat which are made of hard alloy materials are adopted, the front end of the valve rod of the valve element is fixedly connected with the valve plate of the valve element, the annular reinforcing ring and the reinforcing ribs are arranged at the front end of the valve plate, and meanwhile the upper side and the lower side of the rear end of the valve plate are connected with the valve rod through the reinforcing seats respectively. The structure of the valve plate is further reinforced, the valve element and valve plate assembly of the valve is not prone to abrasion or corrosion damage, and therefore the sealing performance and the adjusting precision of the valve are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum exploitation equipment component technical field, concretely is petroleum exploitation wellhead back pressure control device. BACKGROUND

[0002] At present, the throttle valve is often used for controlling in the petroleum exploitation wellhead back pressure control, that is, the opening of the valve is adjusted by manual or driving structure driving, so that the flow area of the wellhead fluid is changed, and then the wellhead back pressure is controlled, and the operation is relatively simple, and the petroleum exploitation wellhead back pressure control device is often used for some oil well operation which does not have particularly high pressure control requirement or is small scale.

[0003] The petroleum exploitation wellhead back pressure control device has the following problems in use: there is a certain wear and corrosion problem, that is, the valve core valve plate assembly of the throttle valve is worn or corroded in the long-term use process, and the sealing property and the adjustment accuracy of the valve are affected. UTILITY MODEL CONTENTS

[0004] (I) technical problem solved.

[0005] In view of the defects of the prior art, the petroleum exploitation wellhead back pressure control device is provided, and the problems in the background art are solved.

[0006] (II) technical scheme.

[0007] In order to achieve the above object, the utility model provides the following technical scheme: the petroleum exploitation wellhead back pressure control device, including the valve body external mechanism, the valve core assembly is rotatably installed in the inside of the valve body external mechanism, the valve body external mechanism and the valve core assembly are hard alloy materials, the valve body external mechanism includes a valve seat, a assembly hole is formed in the inner side wall of the valve seat, a first sealing bearing is rotatably installed in the assembly hole at one end, a second sealing bearing is rotatably installed in the assembly hole at the other end, the first sealing bearing is fixedly sleeved with the first connecting rod on the inner side rotating end, the valve core assembly includes the second connecting rod fixedly sleeved on the inner side rotating end of the second sealing bearing, the first connecting rod and the second connecting rod are fixedly connected with the valve rod, the valve rod is fixedly connected with the valve plate at the front end, and the valve plate is arranged in the valve seat.

[0008] As a further scheme of the utility model: the structure reinforcing mechanism is arranged at the front and rear ends of the valve plate, the structure reinforcing mechanism includes the annular reinforcing ring fixedly connected to the outer side of the front end of the valve plate, a plurality of reinforcing ribs are fixedly connected to the inner side wall of the annular reinforcing ring in equal distance from top to bottom, the rear ends of the plurality of reinforcing ribs are fixedly connected to the valve plate, and the structure reinforcing mechanism further includes two groups of reinforcing seats fixedly connected to the upper and lower ends of the valve rod.

[0009] As a further scheme of the utility model: the valve seat other end and the opening of its assembly hole are fixedly connected with a connecting sleeve, the second connecting rod passes through the connecting sleeve and is provided with a connecting hole at the other end, and the valve seat one end and the opening of its assembly hole are fixedly installed with a sealing end cover through bolts.

[0010] As a further scheme of the utility model: the connecting sleeve annular outer side wall is fixedly connected with a plurality of reinforcing seats at equal angles, the reinforcing seat one end is fixedly connected with the valve seat, and the valve seat annular outer side wall middle part is fixedly connected with a plurality of reinforcing ribs at equal angles.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1、In the utility model, through the adoption of the reinforced durable valve body structure design, the valve core and the valve seat adopt the hard alloy material, the valve rod front end of the valve core is fixedly connected with the valve plate of the valve core, the valve plate front end is provided with an annular reinforcing ring and a reinforcing rib, and the upper and lower sides of the valve plate rear end are connected with the valve rod through a plurality of reinforcing seats, which further plays a structure reinforcing role of the valve plate, the valve core valve plate assembly of the valve is not easy to wear or corrode, thereby guaranteeing the sealing performance and adjustment accuracy of the valve.

[0013] 2、In the utility model, the valve seat both ends are provided with assembly holes, and the sealing bearings are fixedly installed in the assembly holes, the connecting rods are fixedly sleeved with the inner rotating end of the sealing bearings, the two connecting rods are fixedly connected with the end heads of the corresponding sides of the valve rod through the embedded mode, the valve rod is supported through the connecting rods on both sides, and the stability of rotation is good. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the overall perspective view of the utility model;

[0015] Fig. 2 It is the valve body external mechanism perspective view of the utility model;

[0016] Fig. 3 It is the valve core assembly perspective view of the utility model;

[0017] Fig. 4 It is the valve core assembly perspective view of the utility model.

[0018] In the drawing: 1, valve body external mechanism; 2, valve core assembly; 11, valve seat; 12, reinforcing rib; 13, assembly hole; 14, connecting sleeve; 15, reinforcing seat; 16, sealing end cover; 17, first sealing bearing; 18, first connecting rod; 19, second sealing bearing; 21, second connecting rod; 22, connecting hole; 23, valve rod; 24, valve plate; 25, reinforcing seat; 26, annular reinforcing ring; 27, reinforcing rib. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0020] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0022] Please refer to Figs. 1-4 In the embodiment of the present application, the oil extraction wellhead back pressure control device comprises a valve body external mechanism 1, a valve core assembly 2 is rotatably installed on the inner side of the valve body external mechanism 1, the valve body external mechanism 1 and the valve core assembly 2 are made of hard alloy material, the valve body external mechanism 1 comprises a valve seat 11, a assembly hole 13 is formed at each end of the inner side wall of the valve seat 11, a first sealing bearing 17 is rotatably installed in one end assembly hole 13, a second sealing bearing 19 is rotatably installed in the other end assembly hole 13, a first connecting rod 18 is fixedly sleeved on the inner side rotating end of the first sealing bearing 17, the valve core assembly 2 comprises a second connecting rod 21 fixedly sleeved on the inner side rotating end of the second sealing bearing 19, a valve stem 23 is fixedly connected between the first connecting rod 18 and the second connecting rod 21, a valve plate 24 is fixedly connected to the front end of the valve stem 23, the valve plate 24 is arranged in the valve seat 11, assembly holes 13 are formed at both ends of the valve seat 11, sealing bearings are fixedly installed in the assembly holes 13, connecting rods are fixedly sleeved on the inner side rotating end of the sealing bearings, and the two connecting rods are fixedly connected to the end of the valve stem 23 on the corresponding side in an embedded manner. The valve stem 23 is supported by the connecting rods on both sides, and the rotation stability is good.

[0023] The valve plate 24 is equipped with structural reinforcement mechanisms at both its front and rear ends. These mechanisms include an annular reinforcing ring 26 fixedly connected to the outer front end of the valve plate 24, with multiple reinforcing ribs 27 fixedly connected at equal intervals from top to bottom along the inner wall of the annular reinforcing ring 26. The rear ends of the multiple reinforcing ribs 27 are fixedly connected to the valve plate 24. The structural reinforcement mechanisms also include two sets of reinforcing seats 25 fixedly connected to the upper and lower ends of the valve stem 23. Each set of reinforcing seats 25 comprises multiple seats, with their front ends fixedly connected to the valve plate 24. The entire structure is designed for reinforcement and durability. The valve body structure design uses a valve core and valve seat 11 made of hard alloy material. The valve stem 23 of the valve core is fixedly connected to the valve plate 24 of the valve core at the front end. The valve plate 24 is provided with an annular reinforcing ring 26 and reinforcing ribs 27 at the front end. At the same time, the valve stem 23 is connected to the upper and lower sides of the rear end of the valve plate 24 through multiple reinforcing seats 25, which further strengthens the structure of the valve plate 24. The valve core and valve plate 24 components are not easily worn or corroded, thus ensuring the sealing performance and adjustment accuracy of the valve.

[0024] A connecting sleeve 14 is fixedly connected to the other end of the valve seat 11 at the opening of its mounting hole 13. The second connecting rod 21 passes through the connecting sleeve 14 and has a connecting hole 22 at the other end. A sealing end cap 16 is fixedly installed at one end of the valve seat 11 at the opening of its mounting hole 13 by bolts. The valve opening can be adjusted by inserting the connecting rod into the connecting hole 22 and manually prying the second connecting rod 21 to rotate, thereby driving the valve plate 24 to rotate, thereby changing the flow cross-sectional area of ​​the wellhead fluid and controlling the wellhead back pressure. Alternatively, a drive device can be used, with its drive end connected to the connecting hole 22 via a connecting component, to drive the second connecting rod 21 to rotate.

[0025] Multiple reinforcing seats 15 are fixedly connected to the annular outer wall of the connecting sleeve 14 at equal angles. One end of the reinforcing seat 15 is fixedly connected to the valve seat 11. Multiple reinforcing ribs 12 are fixedly connected to the middle of the annular outer wall of the valve seat 11 at equal angles, which serves to reinforce the structure of the valve seat 11.

[0026] The working principle of this utility model is as follows: the valve seat 11 can be installed at the back pressure control point of the oil wellhead. During operation, the connecting rod can be inserted into the connecting hole 22, and the second connecting rod 21 can be manually pried to rotate, thereby driving the valve plate 24 to rotate to adjust the valve opening, thereby changing the flow cross-sectional area of ​​the wellhead fluid and controlling the wellhead back pressure. Alternatively, a driving device can be used, and its driving end can be connected to the connecting hole 22 via the connecting component to drive the second connecting rod 21 to rotate. Since both ends of the valve seat 11 are provided with assembly holes 13, and sealed bearings are fixedly installed in the assembly holes 13, the rotating end of the sealed bearing is fixedly sleeved with a connecting rod. The two connecting rods are embedded and fixedly connected to the end of the valve stem 23 on the corresponding side. The valve stem 23 is supported by the connecting rods on both sides, and its rotation is stable.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A back pressure control device for oil wellheads, comprising an external valve body mechanism (1), wherein a valve core assembly (2) is rotatably mounted on the inner side of the external valve body mechanism (1). Its features are: The valve body external mechanism (1) and valve core assembly (2) are made of hard alloy. The valve body external mechanism (1) includes a valve seat (11). Each end of the inner side wall of the valve seat (11) is provided with an assembly hole (13). A first sealing bearing (17) is rotatably installed in the assembly hole (13) at one end, and a second sealing bearing (19) is rotatably installed in the assembly hole (13) at the other end. The first connecting rod (18) is fixedly sleeved on the inner rotating end of the first sealed bearing (17), and the valve core assembly (2) includes a second connecting rod (21) fixedly sleeved on the inner rotating end of the second sealed bearing (19), and a valve stem (23) is fixedly connected between the first connecting rod (18) and the second connecting rod (21). The valve stem (23) is fixedly connected to a valve plate (24) at its front end. The valve plate (24) is located inside the valve seat (11). The valve plate (24) is provided with structural reinforcement mechanisms at both ends.

2. The oil wellhead backpressure control device according to claim 1, characterized in that: The structural reinforcement mechanism includes an annular reinforcement ring (26) fixedly connected to the outer side of the front end of the valve plate (24).

3. The oil wellhead backpressure control device according to claim 2, characterized in that: The inner wall of the annular reinforcing ring (26) is fixedly connected with multiple reinforcing ribs (27) at equal intervals from top to bottom, and the rear ends of the multiple reinforcing ribs (27) are fixedly connected to the valve plate (24).

4. The oil wellhead backpressure control device according to claim 1, characterized in that: The structural reinforcement mechanism also includes two sets of reinforcement seats (25) fixedly connected to the upper and lower ends of the valve stem (23). Each set of reinforcement seats (25) consists of multiple seats and the front end is fixedly connected to the valve plate (24).

5. The oil wellhead backpressure control device according to claim 1, characterized in that: A connecting sleeve (14) is fixedly connected to the other end of the valve seat (11) and at the opening of its mounting hole (13). The second connecting rod (21) passes through the connecting sleeve (14) and has a connecting hole (22) at the other end. Multiple reinforcing seats (15) are fixedly connected to the annular outer wall of the connecting sleeve (14) at equal angles. One end of the reinforcing seat (15) is fixedly connected to the valve seat (11).

6. The oil wellhead backpressure control device according to claim 1, characterized in that: A sealing end cap (16) is bolted to one end of the valve seat (11) at the opening of its mounting hole (13).

7. The oil wellhead back pressure control device according to claim 1, characterized in that: The valve seat (11) has multiple reinforcing ribs (12) fixedly connected at equal angles in the middle of the annular outer wall.

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