Oilfield well sealing device

Abstract

The invention discloses an oilfield well sealing device, comprising a flap assembly and a connection assembly, wherein the flap assembly comprises an overflow box, a conical cover and an extended reducer wire plug, wherein the conical cover is arranged on the top of the overflow box, wherein one end of the conical cover is hinged with the overflow box, and the other end of the conical cover is detachably connected with the overflow box, wherein one end of the extended reducer wire plug extends into the interior of the overflow box, wherein the extended reducer wire plug is connected with a constant pressure air release valve, wherein the extended reducer wire plug is connected with the inner cavity of the overflow box, wherein the overflow box is provided with an air release hole, wherein the air release hole can be connected with the external environment, and wherein the extended reducer wire plug is connected with the casing head of the oil well. The oilfield well sealing device of the invention connects the casing head with the second flange, and connects the first flange with the second flange, and finally connects the extended reducer wire plug with the casing head, and conveniently realizes operations such as pressure relief, oil release and air release, and the overflow box is detachably connected with the conical cover, which is convenient for cleaning and management, and provides convenience for oilfield recovery and reproduction.

Description

Technical Field

[0001] The invention relates to the technical field of oilfield well shutdown management devices, in particular to an oilfield well sealing device. Background Art

[0002] With the continuous deepening of oilfield development, some oil and water wells have been shut down for a long time due to the decline of formation energy, process, geology, measures and other reasons. These wellheads have been exposed to the wild for a long time, and are severely corroded by wind and rain. There are debris thrown in the casing, which is difficult to identify and find. In particular, some oil wells are currently unable to produce normally, but the oil production units need to regularly release, depressurize, and operate, or use oil recovery vehicles to recover the "oil cap" to increase crude oil production. The original well shutdown and plugging process makes it difficult to manage the later plugging and restore production, which is not conducive to safety, environmental protection, and standardized and visual management.

[0003] Therefore, how to change the current situation in which plugging of oil field wells brings great difficulties to the later management and recovery and reproduction in the existing technology is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0004] The purpose of the present invention is to provide an oilfield well sealing device to solve the problems existing in the above-mentioned prior art, simplify the difficulty of well sealing, and facilitate subsequent management and recovery and reproduction.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides an oilfield well sealing device, comprising:

[0006] A flip cover assembly, wherein the flip cover device comprises an overflow box, a conical cover and an elongated reducer wire plug, wherein the conical cover is arranged on the top of the overflow box, one end of the conical cover is hinged to the overflow box, and the other end opposite to the conical cover is detachably connected to the overflow box, one end of the elongated reducer wire plug extends into the interior of the overflow box, the elongated reducer wire plug is connected to a constant pressure air release valve, the elongated reducer wire plug is connected to the inner cavity of the overflow box, a stop valve is arranged between the elongated reducer wire plug and the inner cavity of the overflow box, and the overflow box is provided with an air release hole, and the air release hole can be connected to the external environment;

[0007] A connecting assembly, the connecting assembly includes a first flange and a second flange, one end of the extended reducer wire plug extending out of the overflow box is connected to the first flange, the second flange can be connected to the casing head of the oil well, the first flange and the second flange are connected, and the extended reducer wire plug is in communication with the casing head of the oil well.

[0008] Preferably, the conical cover is a cone structure, and the bottom radius of the conical cover is larger than the bottom radius of the overflow box.

[0009] Preferably, the first flange has a boss, the overflow box is mounted on the outside of the boss, the extended reducer wire plug passes through the through hole of the first flange and enters the inner cavity of the overflow box, the first flange is threadedly connected to the extended reducer wire plug, and a sealing gasket is arranged between the first flange and the overflow box.

[0010] Preferably, the second flange is sleeved on the outside of the casing head of the oil well, the first flange is communicated with the second flange, the second flange is bolted to the first flange, and a sealing steel ring is arranged between the first flange and the second flange.

[0011] Preferably, the second flange is threadedly connected to the casing head of the oil well.

[0012] Preferably, a die block is arranged in the second flange, and the die block can correct the external thread of the casing head of the oil well. The second flange is connected with a fixing block, and the second flange and the fixing block are detachably connected, and the fixing block can fix the relative position of the die block and the second flange; the second flange is also connected with a handle, and the handle is symmetrically arranged with the axis of the second flange as the center line.

[0013] Preferably, the oilfield well sealing device further comprises a straightening sleeve, which is sleeved on the outside of the casing head of the oil well, connected to the second flange, and coaxially arranged with the lengthened reducer wire plug.

[0014] Preferably, the oilfield well sealing device further comprises a positioning pin, wherein the positioning pin connects the first flange and the second flange, and the number of the positioning pins is at least two.

[0015] Preferably, an identification plate is provided on the outer wall of the overflow box, and a lock buckle is provided between the overflow box and the conical cover.

[0016] Compared with the prior art, the present invention has achieved the following technical effects: the oilfield well sealing device of the present invention comprises a flap assembly and a connecting assembly, the flap assembly comprises an overflow box, a conical cover and an extended reducer wire plug, the conical cover is arranged on the top of the overflow box, one end of the conical cover is hinged with the overflow box, the other end opposite to the conical cover is detachably connected with the overflow box, one end of the extended reducer wire plug extends into the interior of the overflow box, the extended reducer wire plug is connected with a constant pressure vent valve, the extended reducer wire plug is connected with the inner cavity of the overflow box, a stop valve is arranged between the extended reducer wire plug and the inner cavity of the overflow box, the overflow box is provided with a vent hole, and the vent hole can be connected with the external environment; the connecting assembly comprises a first flange and a second flange, one end of the extended reducer wire plug extending out of the overflow box is connected with the first flange, the second flange can be connected with the casing head of the oil well, the first flange and the second flange are connected, and the extended reducer wire plug is connected with the casing head of the oil well. The oilfield well sealing device of the present invention connects the casing head with the second flange, and then connects the first flange with the second flange, and finally connects the extended reducer wire plug with the casing head, so as to conveniently realize operations such as pressure relief, oil discharge and air discharge, and the overflow box and the conical cover can be detachably connected, which is convenient for cleaning and management, and provides convenience for oilfield recovery and reproduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 creative labor.

[0018] Figure 1 It is a schematic diagram of the cutaway structure of the oil field well sealing device of the present invention;

[0019] Among them, 1 is an overflow box, 2 is a conical cover, 3 is an extended reducer wire plug, 4 is a constant pressure vent valve, 5 is a stop valve, 6 is a vent hole, 7 is a first flange, 8 is a second flange, 9 is a casing head, 10 is a sealing gasket, 11 is a sealing steel ring, 12 is a die block, 13 is a fixing block, 14 is a lever, 15 is a straightening sleeve, 16 is a positioning pin, 17 is an identification plate, and 18 is a lock. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The purpose of the present invention is to provide an oilfield well sealing device to solve the problems existing in the above-mentioned prior art, simplify the difficulty of well sealing, and facilitate subsequent management and recovery and reproduction.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the cutaway structure of the oil field well sealing device of the present invention.

[0024] The present invention provides an oilfield well sealing device, comprising:

[0025] A flip cover assembly, the flip cover device includes an overflow box 1, a conical cover 2 and an extended reducer wire plug 3, the conical cover 2 is arranged on the top of the overflow box 1, one end of the conical cover 2 is hinged to the overflow box 1, and the other end of the conical cover 2 is detachably connected to the overflow box 1, one end of the extended reducer wire plug 3 extends into the interior of the overflow box 1, the extended reducer wire plug 3 is connected to a constant pressure vent valve 4, the extended reducer wire plug 3 is connected to the inner cavity of the overflow box 1, a stop valve 5 is arranged between the extended reducer wire plug 3 and the inner cavity of the overflow box 1, and the overflow box 1 is provided with a vent hole 6, which can be connected to the external environment;

[0026] The connecting assembly includes a first flange 7 and a second flange 8. One end of the extended reducer wire plug 3 extending out of the overflow box 1 is connected to the first flange 7. The second flange 8 can be connected to the casing head 9 of the oil well. The first flange 7 and the second flange 8 are connected. The extended reducer wire plug 3 is connected to the casing head 9 of the oil well.

[0027] The oilfield well sealing device of the present invention connects the casing head 9 with the second flange 8, and connects the first flange 7 with the second flange 8, and finally connects the extended reducer wire plug 3 with the casing head 9, so as to conveniently realize the operations of pressure relief, oil discharge and air discharge, and the overflow box 1 and the conical cover 2 can be detachably connected, which is convenient for cleaning and management, and provides convenience for oilfield recovery and reproduction.

[0028] Among them, the conical cover 2 is a cone structure, and the surface of the conical cover 2 will not retain rainwater and other debris. The bottom radius of the conical cover 2 is larger than the bottom radius of the overflow box 1, which prevents rainwater and the like from entering the overflow box 1.

[0029] Specifically, the first flange 7 has a boss, the overflow box 1 is mounted on the outside of the boss, the lengthened reducer plug 3 passes through the through hole of the first flange 7 and enters the inner cavity of the overflow box 1, the first flange 7 is threadedly connected with the lengthened reducer plug 3, and is easy to disassemble and assemble, and a sealing gasket 10 is arranged between the first flange 7 and the overflow box 1 to enhance the sealing effect. In this specific embodiment, the axial cross section of the first flange 7 is a "convex" shape.

[0030] In addition, the second flange 8 is mounted on the outside of the casing head 9 of the oil well, the first flange 7 is connected to the second flange 8, and the second flange 8 is bolted to the first flange 7 for easy disassembly and assembly. A sealing steel ring 11 is arranged between the first flange 7 and the second flange 8 to prevent leakage.

[0031] More specifically, the second flange 8 is threadedly connected to the casing head 9 of the oil well, and the axial cross-section of the second flange 8 is an inverted "convex" shape.

[0032] Since the casing head 9 of the oil well may be rusted due to environmental factors, which may affect the connection between the casing head 9 and the second flange 8, in the present specific embodiment, a die block 12 is arranged in the second flange 8, and the die block 12 can correct the external thread of the casing head 9 of the oil well. After the correction, the second flange 8 and the casing head 9 are threadedly connected through the die block 12. The second flange 8 is connected to a fixing block 13, and the second flange 8 and the fixing block 13 are detachably connected. The fixing block 13 can fix the relative position of the die block 12 and the second flange 8; the second flange 8 is also connected to a lever 14, and the lever 14 is symmetrically arranged with the axis of the second flange 8 as the center line, so as to facilitate the operator to apply force.

[0033] Furthermore, the oilfield well sealing device also includes a straightening sleeve 15, which is mounted on the outside of the casing head 9 of the oil well. The straightening sleeve 15 is connected to the second flange 8. The straightening sleeve 15 is coaxially arranged with the extended reducer wire plug 3. With the help of the straightening sleeve 15, it can be quickly positioned so that the casing head 9 and the extended reducer wire plug 3 are coaxial.

[0034] Similarly, the oilfield well sealing device also includes a positioning pin 16, which connects the first flange 7 and the second flange 8 to quickly position the first flange 7 and the second flange 8. The number of the positioning pins 16 is at least two to prevent the first flange 7 and the second flange 8 from rotating relative to each other during the installation process, thereby improving the positioning accuracy.

[0035] Furthermore, a stainless steel identification plate 17 is provided on the outer wall of the overflow box 1 for recording the information of the oil well, so as to facilitate the operator to understand the usage of the oil well; in addition, in this specific embodiment, a transparent window is also provided on the overflow box 1 to realize visualization inside the overflow box 1, and a lock buckle 18 is provided between the overflow box 1 and the conical cover 2 for easy management.

[0036] The oilfield well sealing device of the present invention comprises a flap assembly and a connecting assembly, which connects the casing head 9 with the second flange 8, and connects the first flange 7 with the second flange 8, and finally connects the extended reducer wire plug 3 with the casing head 9, and the extended reducer wire plug 3 is connected with the inner cavity of the overflow box 1, which not only simplifies the difficulty of well sealing, but also can conveniently realize operations such as pressure relief, oil release and air release; one end of the overflow box 1 is hinged with the conical cover 2, and the other end of the overflow box 1 is detachably connected with the conical cover 2, which is convenient for the operator to check the situation in the overflow box 1 in time as well as operate and clean; a transparent window is arranged on the outer wall of the overflow box 1 to improve the visualization degree, and at the same time provide convenience for oil well recovery and reproduction.

[0037] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An oilfield well sealing device, characterized in that: include: A flip cover assembly, the flip cover assembly comprises an overflow box, a conical cover and an extended reducer wire plug, the conical cover is arranged on the top of the overflow box, one end of the conical cover is hinged to the overflow box, the other end opposite to the conical cover is detachably connected to the overflow box, one end of the extended reducer wire plug extends into the interior of the overflow box, the extended reducer wire plug is connected with a constant pressure air release valve, the extended reducer wire plug is connected to the inner cavity of the overflow box, a stop valve is arranged between the extended reducer wire plug and the inner cavity of the overflow box, the overflow box is provided with an air release hole, and the air release hole can be connected to the external environment; the conical cover is a cone structure, and the bottom radius of the conical cover is larger than the bottom radius of the overflow box; A connecting assembly, the connecting assembly includes a first flange and a second flange, the end of the extended reducer wire plug extending out of the overflow box is connected to the first flange, the second flange can be connected to the casing head of the oil well, the first flange and the second flange are connected, the extended reducer wire plug is in communication with the casing head of the oil well; the first flange has a boss, the overflow box is sleeved on the outside of the boss, the extended reducer wire plug passes through the through hole of the first flange and enters the inner cavity of the overflow box, the first flange is threadedly connected to the extended reducer wire plug, and a sealing gasket is arranged between the first flange and the overflow box; the first The two flanges are mounted on the outside of the casing head of the oil well, the first flange is communicated with the second flange, the second flange is bolted to the first flange, and a sealing steel ring is arranged between the first flange and the second flange; a die block is arranged in the second flange, and the die block can correct the external thread of the casing head of the oil well, the second flange is connected to a fixing block, the second flange is detachably connected to the fixing block, and the fixing block can fix the relative position of the die block and the second flange; a lever is also connected to the second flange, and the lever is symmetrically arranged with the axis of the second flange as the center line.

2. The oilfield well sealing device according to claim 1, characterized in that: The second flange is threadedly connected to the casing head of the oil well.

3. The oilfield well sealing device according to claim 1 or 2, characterized in that: It also includes a straightening sleeve, which is sleeved on the outside of the casing head of the oil well, connected to the second flange, and coaxially arranged with the lengthened reducer wire plug.

4. The oilfield well sealing device according to claim 1 or 2, characterized in that: It also includes positioning pins, which connect the first flange and the second flange, and the number of the positioning pins is at least two.

5. The oilfield well sealing device according to claim 1, characterized in that: An identification plate is arranged on the outer wall of the overflow box, and a lock buckle is arranged between the overflow box and the conical cover.

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