Wellhead Christmas tree device capable of heating and preserving heat

Abstract

The utility model relates to the technical field of Christmas tree heat preservation, in particular to a wellhead Christmas tree device capable of heating and preserving heat. Comprising a Christmas tree body, the Christmas tree body comprises a lower pipe and an upper pipe, the upper pipe and the lower pipe are in butt joint through two flanges, the two sides of the lower pipe and the two sides of the upper pipe are fixedly communicated with branch pipes, valves are installed on the branch pipes, and an anti-eccentric-wear blowout prevention box is installed at the upper end of the upper pipe. Flange sleeves cover the outer sides of the two flanges, the side pipe sleeve is detachably and fixedly connected with the vertical pipe sleeve on one side of the side pipe sleeve, and the upper vertical pipe sleeve and the lower vertical pipe sleeve are detachably and fixedly connected with the flange sleeves. The heat preservation structure is divided into independent modules such as the side pipe sleeve, the vertical pipe sleeve and the flange sleeve, assemblies can be flexibly increased or decreased according to the number of valves and pipeline layout of different Christmas trees, the Christmas tree heat preservation structure is suitable for the Christmas trees of various models, and the application range is remarkably expanded.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of wellhead Christmas tree device of heating and heat preservation. BACKGROUND

[0002] In oil production engineering, Christmas tree is the wellhead device used for exploiting oil in self-flowing well and machine production well. It is the main equipment for controlling and regulating oil and gas production at the uppermost part of oil and gas well, mainly composed of casing head, tubing head and Christmas tree body. In cold winter, the outside temperature is too low, which causes the condensation of liquid, gas and other media in the Christmas tree, affecting the flow and production, and causing the failure of pipeline, valve and other equipment, resulting in the risk of medium leakage. Moreover, it is inconvenient to disassemble for daily inspection and maintenance, so it is necessary to prevent freezing and heat preservation of the oil production and gas production valve of Christmas tree. The traditional heat preservation of Christmas tree uses a large amount of felt wrapping, then uses glass silk cloth to bundle, and finally paints. The process is complicated, time is tight, task is heavy, and a large amount of manpower and material resources are needed. When there is a new task at the wellhead, the old heat preservation material needs to be destroyed and removed. It is very difficult to remove the paint after it hardens. After disassembly, it needs to be reassembled for a while. Sometimes it needs to be repeated several times a year. A large amount of felt wrapping is used, which cannot adjust the range of heat preservation for Christmas tree, and it is a waste. It is not conducive to cost saving and cost control. Repeated procedures require repeated well shut-down, which affects production and equipment life. At the same time, the heat preservation effect is not good, and the heat preservation effect of the Christmas tree for heavy oil exploitation is limited, which is easy to cause the retention of crude oil.

[0003] To solve the above technical problems, the patent document with publication number CN221277708U discloses a kind of integrated winter wellhead Christmas tree heating and heat preservation device that can be adjusted, the device includes Christmas tree, Christmas tree is wrapped with rear protective shell and front protective shell, rear protective shell and front protective shell are connected, rear protective shell and front protective shell form an internal heat preservation layer, heat preservation cotton is arranged in the internal heat preservation layer, two heat preservation units are arranged along the Christmas tree in the internal heat preservation layer, the two heat preservation units are symmetrically arranged, and the two heat preservation units are connected by a flow guide pipe. The heat preservation unit includes a hot water pipe, the hot water pipe is arranged along the upper part of the Christmas tree, the lower side of the parallel pipe, the side of the vertical pipe in the middle and the upper side of the lower parallel pipe, the two ends of the hot water pipe are both outwardly penetrated through the rear protective shell, the end of the hot water pipe close to the upper horizontal pipe of the Christmas tree is connected with the external heat supply boiler, the other end of the hot water pipe is provided with a first electromagnetic valve, and the end of the hot water pipe close to the lower horizontal pipe of the Christmas tree is connected with the flow guide pipe. The device wraps the Christmas tree by setting the front protective shell and the rear protective shell, sets the heat preservation layer in the front protective shell and the rear protective shell, and sets the hot water pipe in the front protective shell and the rear protective shell to realize the heat preservation of the Christmas tree. However, different Christmas trees need to be provided with different number of valves, and the heating and heat preservation device needs to be made according to the Christmas tree, so the application range is small, and the hot water pipe needs to be connected with the heat supply boiler, which is not suitable for the well site without heat supply boiler. Utility model content

[0004] The utility model discloses a kind of wellhead Christmas tree devices of heating and heat preservation, which is low in cost, wide in application range, and low in requirement for well site facilities.

[0005] To achieve the above object, the utility model provides technical scheme:

[0006] A wellhead Christmas tree device of heating and heat preservation, comprising a Christmas tree body, the Christmas tree body includes a lower pipe and an upper pipe, the upper pipe and the lower pipe are connected by two flanges, and branch pipes are fixedly connected to the two sides of the lower pipe and the upper pipe; the two branch pipes at the lower side and the lower pipe form a lower cross, and the two branch pipes at the upper side and the upper pipe form an upper cross; valves are installed on the branch pipes; a blowout preventer box is installed on the upper end of the upper pipe; characterized in that, a side pipe sleeve is wrapped outside the branch pipes, vertical pipe sleeves are wrapped outside the upper pipe and the lower pipe, and flange sleeves are wrapped outside the two flanges; the side pipe sleeve and the vertical pipe sleeve on one side thereof are detachably fixed; and the two vertical pipe sleeves and the flange sleeves are detachably fixed.

[0007] Specifically, opposite surfaces of the side pipe sleeve and the vertical pipe sleeve on one side thereof are fixed by magic tape.

[0008] Specifically, first grooves corresponding to valve rods of the valves are formed at the upper and lower ends of the side pipe sleeve; two second grooves are formed at opposite ends of the side pipe sleeve relative to the vertical pipe sleeve; a connecting band is fixed to the upper end of the side pipe sleeve; a connecting buckle is fixed to the lower end of the side pipe sleeve; after the upper and lower ends of the side pipe sleeve are contacted and surrounded to form a cylindrical structure, the valve rod of the valve is located between the two first grooves, and part of the vertical pipe sleeve is located in the two second grooves.

[0009] Specifically, third grooves corresponding to the branch pipes are formed at the left and right ends of the vertical pipe sleeve; a sub Velcro band is fixed to the upper and lower ends of the vertical pipe sleeve; a connecting band is fixed to the right end of the vertical pipe sleeve; a connecting buckle is fixed to the left end of the vertical pipe sleeve; after the left and right ends of the vertical pipe sleeve are contacted and surrounded to form a cylindrical structure, the branch pipe is located in the third groove, and an arc-shaped groove is formed in the part of the vertical pipe sleeve corresponding to the branch pipe; the plug pad is arc-shaped, a female Velcro band is fixed to the upper and lower ends of the plug pad, and the sub Velcro band and the female Velcro band are fixed after the plug pad is placed in the arc-shaped groove of the vertical pipe sleeve corresponding to the branch pipe.

[0010] Specifically, the upper and lower ends of the flange sleeve are processed with convex edges, the left end of the flange sleeve is fixed with a connecting belt, and the right end of the flange sleeve is fixed with a connecting buckle, and after the left and right ends of the flange sleeve contact and enclose the cylindrical structure, the two flanges are located between the two convex edges.

[0011] Specifically, the electric heating belt is fixed in the standpipe sleeve part on the upper and lower sides of the third groove, and the electric heating belt is fixed in the standpipe sleeve part between the two third grooves, and the shape of the iron sheet in the standpipe sleeve is matched with the shape of the standpipe sleeve.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. By dividing the heat preservation structure into independent modules such as the side pipe sleeve, the standpipe sleeve and the flange sleeve, the number of valves and the pipeline layout of different Christmas trees can be flexibly increased or decreased to adapt to various types of Christmas trees, thereby significantly expanding the application range.

[0014] 2. The detachable fixing mode of the magic tape, the connecting belt and the connecting buckle is adopted, without destructive disassembly, so that the installation process is simplified, the repeated operation cost is reduced, and the utility model is especially suitable for the scene of frequent maintenance of well sites, and the disadvantages of repeated removal of traditional felt wrapping are avoided.

[0015] 3. The flexible electric heating belt in the combined heat preservation layer can accurately control the temperature, and the utility model is especially suitable for remote well sites without heating facilities.

[0016] 4. The double heat preservation barriers formed by the heat preservation cotton layer and the waterproof heat preservation cloth layer reduce heat loss, and the iron sheet is embedded in the combined heat preservation layer to enhance the structural rigidity.

[0017] 5. The first groove matches the valve rod to avoid interference between the heat preservation layer and the valve parts and reduce heat leakage points. The arc-shaped groove of the standpipe sleeve and the arc-shaped design of the plug pad fill the gap at the branch pipe connection, are fixed by the primary and secondary sticky buckle belts, form a continuous heat preservation surface, and prevent local cold bridge effect. The flange sleeve is provided with convex edges and wraps the flange to block heat from escaping from the flange gap, and solves the pain point that the traditional heat preservation is difficult to cover the complex joint.

[0018] 6. The modular components can be repeatedly disassembled and used, the one-time consumption of traditional felt and glass silk cloth is reduced, the long-term maintenance cost is reduced, no painting and bundling processes are needed, a single person can complete the installation through the magic tape and the connecting belt, manpower and time cost are saved, the well shut-in period is shortened, and the yield is indirectly improved.

[0019] 7. The insulation cotton layer is prone to deformation. The sheet metal, acting as an embedded skeleton, maintains the pre-set shape of the side pipe sleeve, riser sleeve, and flange sleeve, ensuring a tight fit with pipes and valves when the sleeves are assembled into a cylindrical shape, reducing gaps caused by material collapse after installation. After the side pipe sleeve, riser sleeve, and flange sleeve are assembled into a cylindrical structure, the sheet metal maintains the shape of the sleeves, riser sleeve, and flange sleeve, facilitating connection with straps and fasteners. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the oil well tree.

[0021] Figure 2 This is a schematic diagram showing the installation of the side pipe sleeve, riser sleeve, and flange sleeve onto the tree trunk body.

[0022] Figure 3 This is a schematic diagram showing the gasket after installation.

[0023] Figure 4 This is a schematic diagram of the side sleeve after it has been unfolded.

[0024] Figure 5 for Figure 2 Sectional view along line AA.

[0025] Figure 6 for Figure 3 Sectional view along the BB direction.

[0026] Figure 7 This is a schematic diagram of the riser sleeve after it has been unfolded.

[0027] Figure 8 This is a rear view of the plug.

[0028] Figure 9 This is a schematic diagram of the flange sleeve after it has been unfolded.

[0029] The parts in the attached diagram are named as follows: 1. Lower pipe, 2. Upper pipe, 3. Branch pipe, 4. Valve, 5. Anti-wear and anti-spray box, 6. Side pipe sleeve, 7. Riser pipe sleeve, 8. Flange sleeve, 9. Connecting strap, 10. Male hook and loop fastener, 11. Female hook and loop fastener, 12. Gasket, 13. First groove, 14. Second groove, 15. Electric heating belt, 16. Sheet metal, 17. Third groove, 18. Raised edge. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] Example 1: Refer to Figures 1-9As shown, a heatable and heat-preservation wellhead Christmas tree device includes a Christmas tree body, the Christmas tree body includes a lower pipe 1 and an upper pipe 2, the upper pipe 2 and the lower pipe 1 are connected through two flanges, and two branch pipes 3 are fixedly connected on both sides of the lower pipe 1 and the upper pipe 2, the two branch pipes 3 below and the lower pipe 1 form a lower cross, the two branch pipes 3 above and the upper pipe 2 form an upper cross, and a valve 4 is installed on each of the branch pipes 3, and an anti-eccentric wear and blowout prevention box 5 is installed on the upper end of the upper pipe 2.

[0032] The outer side of the branch pipe 3 is covered with a side pipe sleeve 6, the outer sides of the upper pipe 2 and the lower pipe 1 are covered with vertical pipe sleeves 7, and the outer sides of the two flanges are covered with flange sleeves 8.

[0033] The side pipe sleeve 6 and the vertical pipe sleeve 7 on one side thereof are detachably fixedly connected, and the two vertical pipe sleeves 7 and the flange sleeves 8 are detachably fixedly connected.

[0034] Specifically, the opposite surfaces of the side pipe sleeve 6 and the vertical pipe sleeve 7 on one side thereof are fixedly connected through magic tape. The opposite surfaces of the vertical pipe sleeve 7 and the flange sleeve 8 are fixedly connected through magic tape.

[0035] The side pipe sleeve 6, the vertical pipe sleeve 7 and the flange sleeve 8 are made of a flexible combined heat preservation layer. The combined heat preservation layer includes a heat preservation cotton layer, a flexible electric heating belt 15 is arranged in the heat preservation cotton layer, waterproof heat preservation cloth layers are fixed on both sides of the heat preservation cotton layer, and the edges of the waterproof heat preservation cloth layers are fixedly connected and encapsulate the heat preservation cotton layer.

[0036] First grooves 13 corresponding to valve rods of the valves 4 are formed at the upper and lower ends of the side pipe sleeve 6, two second grooves 14 are formed at the opposite end of the side pipe sleeve 6 relative to the vertical pipe sleeve 7, a connecting belt 9 is fixed to the upper end of the side pipe sleeve 6, a connecting buckle is fixed to the lower end of the side pipe sleeve 6, after the upper and lower ends of the side pipe sleeve 6 contact and enclose a cylindrical structure, the valve rods of the valves 4 are located between the two first grooves 13, and part of the vertical pipe sleeve 7 is located in the two second grooves 14.

[0037] Third grooves 17 corresponding to the branch pipes 3 are formed at the left and right ends of the vertical pipe sleeve 7, and a sub-magnetic fastener belt 10 is fixed to the upper and lower ends of the vertical pipe sleeve 7, the right end of the vertical pipe sleeve 7 is fixed with the connecting belt 9, and the left end of the vertical pipe sleeve 7 is fixed with the connecting buckle. After the left and right ends of the vertical pipe sleeve 7 contact and enclose a cylindrical structure, the branch pipes 3 are located in the third grooves 17, and the part of the vertical pipe sleeve 7 corresponding to the branch pipes 3 forms an arc-shaped groove.

[0038] In order to improve the heat preservation performance of the upper pipe 2 and the lower pipe 1, the electric heating belt 15 is fixed in part of the vertical pipe sleeve 7 on the upper and lower sides of the third grooves 17, and the electric heating belt 15 is fixed in part of the vertical pipe sleeve 7 between the two third grooves 17.

[0039] The plug pad 12 is arc-shaped, and the female Velcro 11 is fixed on both upper and lower ends of the plug pad 12. After the plug pad 12 is placed in the arc-shaped groove on the riser sleeve 7 corresponding to the branch pipe 3, the male Velcro 10 and the female Velcro 11 are adhered and fixed.

[0040] The flange sleeve 8 is provided with a convex edge 18 at both upper and lower ends, and the connecting band 9 is fixed at the left end of the flange sleeve 8, and the connecting buckle is fixed at the right end of the flange sleeve 8. After the left and right ends of the flange sleeve 8 contact and enclose the cylindrical structure, the two flanges are located between the two convex edges 18.

[0041] When the oil tree body is insulated, the flange sleeve 8 is wrapped outside the two flanges, and the flange sleeve 8 is stabilized at both ends by the connecting band 9 and the connecting buckle.

[0042] The two riser sleeves 7 are wrapped outside the upper pipe 2 and the lower pipe 1 respectively, and the third groove 17 corresponds to the branch pipe 3, and then the riser sleeves 7 are stabilized at both ends by the connecting band 9 and the connecting buckle. After the plug pad 12 is placed in the arc-shaped groove on the riser sleeve 7 corresponding to the branch pipe 3, the male Velcro 10 and the female Velcro 11 are adhered and fixed.

[0043] The side pipe sleeve 6 is wrapped around the branch pipe 3, and the first groove 13 corresponds to the valve rod of the valve 4. After the side pipe sleeve 6 is wrapped outside the branch pipe 3, the side pipe sleeve 6 is stabilized at both ends by the connecting band 9 and the connecting buckle. At this time, the riser sleeve 7 is partially located in the second groove 14 of the side pipe sleeve 6, which can reduce the gap between the side pipe sleeve 6 and the riser sleeve 7.

[0044] After the side pipe sleeve 6, the riser sleeve 7 and the flange sleeve 8 are installed, the opposite surfaces of the side pipe sleeve 6 and the riser sleeve 7 on one side are adhered and fixed by the magic tape, and the opposite surfaces of the riser sleeve 7 and the flange sleeve 8 are adhered and fixed by the magic tape, thereby ensuring the stability of the connection of the side pipe sleeve 6, the riser sleeve 7 and the flange sleeve 8.

[0045] The electric heating belt 15 is connected to the power supply, and the electric heating belt 15 can provide heat to heat the oil tree body. The side pipe sleeve 6, the riser sleeve 7 and the flange sleeve 8 are made of a flexible combined insulation layer, which can insulate the oil tree body.

[0046] Example two: on the basis of example one, referring to Figure 4 , Figure 7 and Figure 9 , the iron sheet 16 is arranged in the insulation cotton layer, and the shape of the iron sheet 16 in the riser sleeve 7 is matched with the shape of the riser sleeve 7.

[0047] By arranging the iron sheet 16 in the insulation cotton layer, the iron sheet 16 can maintain the shape of the side pipe sleeve 6, the riser sleeve 7 and the flange sleeve 8 after they enclose the cylindrical structure, which facilitates the connection of the connecting band 9 and the connecting buckle.

[0048] The heat preservation cotton layer is easy to deform, the iron sheet 16 serves as an embedded framework, and can maintain the preset shape of the side pipe sleeve 6, the vertical pipe sleeve 7 and the flange sleeve 8, so as to ensure that the pipe sleeve closely fits the pipeline and the valve when being formed into a cylindrical shape, and to reduce the gap formed due to material collapse after installation.

[0049] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heatable and heat-preserved wellhead Christmas tree device, comprising a Christmas tree body, the Christmas tree body comprising a lower pipe (1) and an upper pipe (2), the upper pipe (2) and the lower pipe (1) being butted by two flanges, and branch pipes (3) being fixedly connected to both sides of the lower pipe (1) and the upper pipe (2), and valves (4) being installed on the branch pipes (3), and an anti-eccentric-wear and anti-blowout box (5) being installed on the upper end of the upper pipe (2), characterized in that, The outer side of the branch pipe (3) is covered with a side pipe sleeve (6), the outer side of the upper pipe (2) and the lower pipe (1) is covered with a vertical pipe sleeve (7), the outer side of the two flanges is covered with a flange sleeve (8), the side pipe sleeve (6) and the vertical pipe sleeve (7) on one side are detachably fixedly connected, and the two vertical pipe sleeves (7) and the flange sleeve (8) are detachably fixedly connected; the side pipe sleeve (6), the vertical pipe sleeve (7) and the flange sleeve (8) are made of a flexible combined heat preservation layer, the combined heat preservation layer comprises a heat preservation cotton layer, the heat preservation cotton layer is provided with an iron sheet (16) and a flexible electric heating belt (15), and the two sides of the heat preservation cotton layer are fixedly provided with waterproof heat preservation cloth layers, the edges of the two waterproof heat preservation cloth layers are fixedly connected and the heat preservation cotton layer is packaged.

2. The heated and insulated wellhead Christmas tree apparatus of claim 1, wherein, The opposite surfaces of the side pipe sleeve (6) and the vertical pipe sleeve (7) on one side are fixedly connected through magic tape.

3. The heated and insulated wellhead Christmas tree apparatus of claim 1, wherein, The upper end and the lower end of the side pipe sleeve (6) are both provided with a first groove (13) corresponding to the valve rod of the valve (4), one end of the side pipe sleeve (6) opposite to the vertical pipe sleeve (7) is provided with two second grooves (14), the upper end of the side pipe sleeve (6) is fixedly provided with a connecting belt (9), and the lower end of the side pipe sleeve (6) is fixedly provided with a connecting buckle; after the upper end and the lower end of the side pipe sleeve (6) are contacted and surrounded to form a cylindrical structure, the valve rod of the valve (4) is located between the two first grooves (13), and part of the vertical pipe sleeve (7) is located in the two second grooves (14).

4. The heated and insulated wellhead Christmas tree apparatus of claim 1, wherein, The left end and the right end of the vertical pipe sleeve (7) are both provided with a third groove (17) corresponding to the branch pipe (3), the upper end and the lower end of the vertical pipe sleeve (7) are both fixedly provided with a sub Velcro belt (10), the right end of the vertical pipe sleeve (7) is fixedly provided with a connecting belt (9), and the left end of the vertical pipe sleeve (7) is fixedly provided with a connecting buckle; after the left end and the right end of the vertical pipe sleeve (7) are contacted and surrounded to form a cylindrical structure, the branch pipe (3) is located in the third groove (17), and part of the vertical pipe sleeve (7) corresponding to the branch pipe (3) forms an arc-shaped groove; the plug pad (12) is further arranged, the plug pad (12) is arc-shaped, the upper end and the lower end of the plug pad (12) are both fixedly provided with a female Velcro belt (11), and after the plug pad (12) is placed in the arc-shaped groove on the vertical pipe sleeve (7) corresponding to the branch pipe (3), the sub Velcro belt (10) and the female Velcro belt (11) are fixedly connected.

5. The heated and insulated wellhead Christmas tree apparatus of claim 1, wherein, The upper end and the lower end of the flange sleeve (8) are both provided with a convex edge (18), the left end of the flange sleeve (8) is fixedly provided with a connecting belt (9), and the right end of the flange sleeve (8) is fixedly provided with a connecting buckle; after the left end and the right end of the flange sleeve (8) are contacted and surrounded to form a cylindrical structure, the two flanges are located between the two convex edges (18).

6. The heated and insulated wellhead Christmas tree apparatus of claim 4, wherein, The electric heating belt (15) is fixedly arranged in part of the vertical pipe sleeve (7) on the left side and the right side of the third groove (17), the electric heating belt (15) is fixedly arranged in part of the vertical pipe sleeve (7) between the two third grooves (17), and the shape of the iron sheet (16) in the vertical pipe sleeve (7) is matched with the shape of the vertical pipe sleeve (7).

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