Wellhead Christmas tree device capable of preserving heat and preventing leakage

Abstract

The utility model discloses a heat preservation anti-leakage wellhead Christmas tree device which comprises a Christmas tree body, the Christmas tree body comprises a main pipeline, the main pipeline is vertically communicated with a plurality of side pipelines, valves are arranged on the main pipeline and each side pipeline, a collecting barrel penetrates through the main pipeline, and the collecting barrel is arranged below the valve of the main pipeline. The valve of each side pipeline is sleeved with a collecting pipe, heating wires are arranged on the outer wall of the collecting pipe and the outer wall of the collecting barrel, the Christmas tree body is sleeved with a protective shell, heat preservation cotton is arranged in the protective shell, and the heat preservation cotton makes contact with the outer walls of the main pipeline and the side pipelines. According to the Christmas tree, heat preservation of all pipelines and valves of the Christmas tree in winter can be achieved, and meanwhile leaked oil at the positions of all the pipeline valves of the Christmas tree can be collected and guided.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil production, and in particular relates to a wellhead Christmas tree device with heat preservation and leakage prevention. Background Art

[0002] In oil production engineering, the Christmas tree is a wellhead device used to extract oil in self-flowing wells and machine-extracted wells. It is the main equipment for controlling and regulating oil and gas production at the top of the oil and gas well. It mainly consists of three parts: casing head, tubing head, and Christmas (gas) tree body. The Christmas tree is a component located at the opening leading to the top of the oil well, including valves for measurement and maintenance, safety systems and a series of monitoring equipment. The Christmas tree connects the production pipeline and oil flow pipe from the well, and serves as an important barrier to isolate the top of the oil well from the external environment. It includes many valves that can be used to regulate or prevent the produced crude oil vapor, natural gas and liquid from gushing out of the well. The Christmas tree is connected to the production manifold system through a submarine pipeline.

[0003] Oilfield Christmas tree insulation cover Since the insulation valves of the thermal system need regular inspection and irregular maintenance, the valves are often disassembled. After disassembly, general insulation materials will be damaged and it is difficult to restore normal operation. In this way, the valves often need to be re-insulated. Repeated valve insulation increases the workload and production costs. Therefore, the oilfield Christmas tree insulation cover is selected to solve this long-standing problem in the insulation of the thermal system. The removable valve insulation cover is a special-shaped insulation product that is "tailor-made" for the frequent disassembly of thermal equipment, pipelines and their accessories in the thermal system. It is quick and reproducible. Disassembly and assembly. However, the current Christmas tree insulation device lacks protection and preventive measures against oil seepage and leakage.

[0004] In the patent application with application number CN201721050989.2, "Device for Insulating Oil Trees and Oil Production Ground Equipment" (publication number CN207177865U, publication date April 3, 2018), a device for insulating oil trees and oil production ground equipment are disclosed. The oil tree has a front side wall provided with a gate valve and a back side wall facing away from the front side wall; the insulation device includes: a support frame, the support frame has a receiving groove capable of accommodating the back side wall; an insulation mechanism, the insulation mechanism includes a first insulation part, a second insulation part and The third insulation part, wherein the first insulation part and the second insulation part are connected to the third insulation part, the third insulation part is arranged in the receiving tank, the first insulation part and the second insulation part extend out of the receiving tank, the insulation layers of the first insulation part and the second insulation part can be wound and wrapped on the front side wall, and the third insulation part can face the back side wall; the heating pipe arranged in the receiving tank can be connected with the liquid injection source; the insulation device can actively insulate and prevent freezing of the oil production tree, and the insulation and antifreeze effects are better, but the insulation device still does not have good protection and preventive measures against oil seepage and leakage. Utility Model Content

[0005] The utility model aims to provide a heat-insulating and leak-proof wellhead Christmas tree device, which solves the technical problem that the leaked oil cannot be collected in the prior art.

[0006] The technical scheme adopted by the utility model is a heat-insulating and leak-proof wellhead Christmas tree device, comprising a Christmas tree body, the Christmas tree body comprising a main pipeline, the main pipeline is vertically connected with a plurality of side pipelines, valves are provided on the main pipeline and each side pipeline, a collecting barrel runs through the main pipeline, the collecting barrel is arranged below the main pipeline valve, a collecting pipe is sleeved at the valve of each side pipeline, heating wires are provided on the outer wall of the collecting pipe and the collecting barrel, a protective shell is sleeved on the outer side of the Christmas tree body, heat-insulating cotton is provided inside the protective shell, and the heat-insulating cotton is in contact with the outer wall of the main pipeline and the side pipeline.

[0007] The utility model is also characterized in that:

[0008] Observation windows are arranged on both sides of the protective shell, and a seepage pipe is arranged on the side of the protective shell away from the valve.

[0009] The collecting pipe comprises an upper semicircular pipe and a lower semicircular pipe, the upper semicircular pipe is fixedly connected to the lower semicircular pipe, the length of the lower semicircular pipe is greater than that of the upper semicircular pipe, the upper semicircular pipe is aligned with one end of the lower semicircular pipe close to the main pipe, the upper semicircular pipe is welded to the outer wall of the side pipe, the lower semicircular pipe is provided with a groove matching with the valve of the side pipe, a first guide pipe is provided at the bottom of the lower semicircular pipe, the first guide pipe is connected to the seepage pipe, and the distance between the lower semicircular pipe and the outer wall of the side pipe is 3cm to 5cm.

[0010] The collecting barrel is a transparent barrel, and a second flow guide pipe is arranged on the top of the collecting barrel, and the second flow guide pipe is connected with the seepage pipe.

[0011] The bottom plate of the collecting barrel is sealed and fixedly connected to the outer wall of the main pipeline, and the distance between the side plate of the collecting barrel and the outer wall of the main pipeline is 3cm to 5cm.

[0012] A wiring port is arranged on the outer wall of the protective shell at a position corresponding to the heating wire.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model of the heat-insulating and anti-leakage wellhead Christmas tree device can realize the winter heat preservation of each pipeline and valve of the Christmas tree through the protective shell, heating wire and heat-insulating cotton. At the same time, the leakage oil at each pipeline valve of the Christmas tree can be collected and diverted through the setting of the collection bucket and the collection pipe, so as to prevent the leakage oil of the Christmas tree from flowing to the soil near the well site and polluting the heat-insulating cotton and heating wire.

[0015] 2. The utility model of the heat-insulating and leak-proof wellhead Christmas tree device realizes efficient heating by setting heating wires outside the collection barrel and the collection pipe. Compared with directly setting heating wires outside each pipeline of the Christmas tree, it saves more heating wires and improves heating efficiency;

[0016] 3. The heat-insulating and leak-proof wellhead Christmas tree device of the utility model can observe the collection of leaked oil inside the collection barrel by setting the collection barrel to be transparent and providing an observation window. At the same time, if there is leakage oil in the seepage pipe and there is no leakage oil in the collection barrel observed by the observation window, the leakage must have occurred in the side pipeline. Generally, when only one side of the pipeline is opened, it is easy to determine which pipeline has leaked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the utility model of a heat-insulating and leak-proof wellhead Christmas tree device;

[0018] Figure 2 It is a schematic diagram of the front structure of the collecting pipe in the heat-insulating and leak-proof wellhead Christmas tree device of the utility model;

[0019] Figure 3 It is a schematic diagram of the back structure of the collecting pipe in the wellhead Christmas tree device with heat preservation and leakage prevention of the utility model;

[0020] Figure 4 It is a front structural schematic diagram of the utility model of a heat-insulating and leak-proof wellhead Christmas tree device;

[0021] Figure 5 The utility model is a schematic diagram of the back structure of a heat-insulating and leak-proof wellhead Christmas tree device.

[0022] In the figure, 1. protective shell, 11. observation window, 12. connection port, 2. main pipeline, 3. side pipeline, 4. Christmas tree body, 5. collecting barrel, 51. second flow guide pipe, 6. collecting pipe, 61. first flow guide pipe, 62. groove, 7. seepage pipe, 8. heating wire, 9. thermal insulation cotton. DETAILED DESCRIPTION

[0023] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0024] The utility model is a heat-insulating and leak-proof wellhead Christmas tree device. Figure 1As shown, the Christmas tree body 4 includes a main pipeline 2, the main pipeline 2 is vertically connected with multiple side pipelines 3, valves are provided on the main pipeline 2 and the multiple side pipelines 3, a collecting barrel 5 runs through the main pipeline 2, the collecting barrel 5 is arranged below the valve of the main pipeline 2, the bottom plate of the collecting barrel 5 is fixedly connected to the outer wall of the main pipeline 2, the distance between the side plate of the collecting barrel 5 and the outer wall of the main pipeline 2 is 3cm to 5cm, the collecting barrel 5 is a transparent barrel, a second guide pipe 51 is provided on the top of the collecting barrel 5, and a collecting pipe 6 is sleeved at the valve of each side pipeline 3, as shown in FIG. Figure 2 As shown, the collecting pipe 6 is composed of an upper semicircular pipe and a lower semicircular pipe, the upper semicircular pipe is fixedly connected to the lower semicircular pipe, the length of the lower semicircular pipe is greater than that of the upper semicircular pipe, the upper semicircular pipe is aligned with one end of the lower semicircular pipe close to the main pipe 2, the upper semicircular pipe is welded to the outer wall of the side pipe 3, and the lower semicircular pipe is provided with a groove 62 that matches the valve of the side pipe 3, as shown in FIG. Figure 3 As shown, a first flow guide pipe 61 is provided at the bottom of the lower semicircular pipe, the distance between the lower semicircular pipe and the outer wall of the side pipe 3 is 3 cm to 5 cm, the outer walls of the collecting pipe 6 and the collecting barrel 5 are provided with heating wires 8, the outer side of the Christmas tree body 4 is wrapped with a protective shell 1, and the inside of the protective shell 1 is provided with heat insulation cotton 9, and the heat insulation cotton 9 is in contact with the outer walls of the main pipe 2 and the side pipe 3, as shown in FIG. Figure 4 , Figure 5 As shown, observation windows 11 are provided on both sides of the protective shell 1, a seepage pipe 7 is provided on the side of the protective shell 1 away from the valve, the seepage pipe 7 is connected with the first guide pipe 61 and the second guide pipe 51, and a wiring port 12 is provided on the side wall of the protective shell 1 at a position corresponding to the heating wire 8.

[0025] The utility model provides a collecting barrel 5 at the valve of the main pipeline 2, and a collecting pipe 6 at the valve of each side pipeline 3, so as to collect the leaked oil at the valves of the main pipeline 2 and the side pipeline 3; a seepage pipe 7 is provided on the protective shell 1, a second guide pipe 51 is provided on the top of the collecting barrel 5, and a first guide pipe 61 is provided at the bottom of the collecting pipe 6. The seepage pipe 7 is connected with the first guide pipe 61 and the second guide pipe 51, so as to guide the collected leaked oil, so as to prevent the leaked oil from the Christmas tree body 4 from flowing to the soil near the well site and polluting the soil, and also prevent the leaked oil from flowing out and polluting the protective shell. Warm cotton 9 and heating wire 8; heating wire 8 is arranged on the outer wall of the collecting barrel 5 and the collecting pipe 6, and the protective shell 1 is filled with heat-insulating cotton 9, and the heat-insulating cotton 9 is in contact with the surface of the main pipeline 2 and each side pipeline 3, so as to realize the heat preservation of each pipeline and valve, and can provide heat efficiently and improve the heating efficiency; observation windows 11 are arranged on both sides of the protective shell 1, and the collecting barrel 5 is set to be transparent, so that the collection of leaked oil inside the collecting barrel 5 can be observed. At the same time, if there is oil leakage in the seepage pipe 7 and there is no oil leakage in the collecting barrel 5 observed by the observation window 11, the leakage occurs in the side pipeline 3.

[0026] When in use, firstly, the collecting barrel 5 is welded below the valve of the main pipeline 2, and the collecting pipe 6 is welded at the valve of the side pipeline 3, and then the heating wire 8 is placed on the outer wall of the collecting barrel 5 and the collecting pipe 6, and then the insulation cotton 9 is filled. If the side pipeline 3 of the Christmas tree is needed, the seepage pipe 7 is always observed, and a flow meter can be installed in the seepage pipe 7. If flow appears, it means that the valve of the side pipeline 3 is leaking. Then observe the internal situation through the observation window 11. If it is found that there is crude oil in the collecting barrel 5 and the liquid level of the collecting barrel 5 reaches the highest height, it is possible that the valve of the main pipeline 2 above the collecting barrel 5 is leaking, and the leaked crude oil enters the collecting barrel 5, and then enters the seepage pipe 7 through the second guide pipe 51 and is discharged; if it is found that the crude oil in the collecting barrel 5 has not reached the highest height or no crude oil is left, it is that the valve of the side pipeline 3 is leaking, and the leaked crude oil falls into the collecting pipe 6, and then is guided by the first guide pipe 61 to the seepage pipe 7 for discharge, and the leakage position is processed.

[0027] Example 1

[0028] A heat-insulating and leak-proof wellhead Christmas tree device comprises a Christmas tree body 4, wherein the Christmas tree body 4 comprises a main pipeline 2, wherein the main pipeline 2 is vertically connected with a plurality of side pipelines 3, wherein valves are arranged on the main pipeline 2 and each side pipeline 3, wherein a collecting barrel 5 is passed through the main pipeline 2, wherein the collecting barrel 5 is arranged below the valve of the main pipeline 2, wherein a collecting pipe 6 is sleeved at the valve of each side pipeline 3, wherein the outer walls of the collecting pipe 6 and the collecting barrel 5 are both provided with heating wires 8, wherein a protective shell 1 is sleeved on the outer side of the Christmas tree body 4, wherein heat-insulating cotton 9 is arranged inside the protective shell 1, wherein the heat-insulating cotton 9 is in contact with the outer walls of the main pipeline 2 and the side pipeline 3, wherein observation windows 11 are arranged on both sides of the protective shell 1, wherein a seepage pipe 7 is arranged on the side of the protective shell 1 away from the valve, wherein the collecting pipe 6 comprises an upper semicircular pipe and a lower semicircular pipe, wherein the upper semicircular pipe and the lower semicircular pipe are connected to each other. The pipes are fixedly connected, the length of the lower semicircular pipe is greater than that of the upper semicircular pipe, the upper semicircular pipe is aligned with one end of the lower semicircular pipe close to the main pipe 2, the upper semicircular pipe is welded to the outer wall of the side pipe 3, the lower semicircular pipe is provided with a groove 62 that matches the valve of the side pipe 3, a first guide pipe 61 is provided at the bottom of the lower semicircular pipe, the first guide pipe 61 is connected with the seepage pipe 7, the distance between the lower semicircular pipe and the outer wall of the side pipe 3 is 3 cm, the collecting barrel 5 is a transparent barrel, a second guide pipe 51 is provided on the top of the collecting barrel 5, the second guide pipe 51 is connected with the seepage pipe 7, the bottom plate of the collecting barrel 5 is sealed and fixedly connected to the outer wall of the main pipe 2, the distance between the side plate of the collecting barrel 5 and the outer wall of the main pipe is 3 cm, and a wiring port 12 is provided on the outer wall of the protective shell 1 at a position corresponding to the heating wire 8.

[0029] Example 2

[0030] A heat-insulating and leak-proof wellhead Christmas tree device comprises a Christmas tree body 4, wherein the Christmas tree body 4 comprises a main pipeline 2, wherein the main pipeline 2 is vertically connected with a plurality of side pipelines 3, wherein valves are arranged on the main pipeline 2 and each side pipeline 3, wherein a collecting barrel 5 is passed through the main pipeline 2, wherein the collecting barrel 5 is arranged below the valve of the main pipeline 2, wherein a collecting pipe 6 is sleeved at the valve of each side pipeline 3, wherein the outer walls of the collecting pipe 6 and the collecting barrel 5 are both provided with heating wires 8, wherein a protective shell 1 is sleeved on the outer side of the Christmas tree body 4, wherein heat-insulating cotton 9 is arranged inside the protective shell 1, wherein the heat-insulating cotton 9 is in contact with the outer walls of the main pipeline 2 and the side pipeline 3, wherein observation windows 11 are arranged on both sides of the protective shell 1, wherein a seepage pipe 7 is arranged on the side of the protective shell 1 away from the valve, wherein the collecting pipe 6 comprises an upper semicircular pipe and a lower semicircular pipe, wherein the upper semicircular pipe and the lower semicircular pipe are connected to each other. The pipes are fixedly connected, the length of the lower semicircular pipe is greater than that of the upper semicircular pipe, the upper semicircular pipe is aligned with one end of the lower semicircular pipe close to the main pipe 2, the upper semicircular pipe is welded to the outer wall of the side pipe 3, the lower semicircular pipe is provided with a groove 62 that matches the valve of the side pipe 3, a first guide pipe 61 is provided at the bottom of the lower semicircular pipe, the first guide pipe 61 is connected with the seepage pipe 7, the distance between the lower semicircular pipe and the outer wall of the side pipe 3 is 4 cm, the collecting barrel 5 is a transparent barrel, a second guide pipe 51 is provided on the top of the collecting barrel 5, the second guide pipe 51 is connected with the seepage pipe 7, the bottom plate of the collecting barrel 5 is sealed and fixedly connected to the outer wall of the main pipe 2, the distance between the side plate of the collecting barrel 5 and the outer wall of the main pipe is 4 cm, and a wiring port 12 is provided on the outer wall of the protective shell 1 at a position corresponding to the heating wire 8.

[0031] Example 3

[0032] A heat-insulating and leak-proof wellhead Christmas tree device comprises a Christmas tree body 4, wherein the Christmas tree body 4 comprises a main pipeline 2, wherein the main pipeline 2 is vertically connected with a plurality of side pipelines 3, wherein valves are arranged on the main pipeline 2 and each side pipeline 3, wherein a collecting barrel 5 is passed through the main pipeline 2, wherein the collecting barrel 5 is arranged below the valve of the main pipeline 2, wherein a collecting pipe 6 is sleeved at the valve of each side pipeline 3, wherein the outer walls of the collecting pipe 6 and the collecting barrel 5 are both provided with heating wires 8, wherein a protective shell 1 is sleeved on the outer side of the Christmas tree body 4, wherein heat-insulating cotton 9 is arranged inside the protective shell 1, wherein the heat-insulating cotton 9 is in contact with the outer walls of the main pipeline 2 and the side pipeline 3, wherein observation windows 11 are arranged on both sides of the protective shell 1, wherein a seepage pipe 7 is arranged on the side of the protective shell 1 away from the valve, wherein the collecting pipe 6 comprises an upper semicircular pipe and a lower semicircular pipe, wherein the upper semicircular pipe and the lower semicircular pipe are connected to each other. The pipes are fixedly connected, the length of the lower semicircular pipe is greater than that of the upper semicircular pipe, the upper semicircular pipe is aligned with one end of the lower semicircular pipe close to the main pipe 2, the upper semicircular pipe is welded to the outer wall of the side pipe 3, the lower semicircular pipe is provided with a groove 62 that matches the valve of the side pipe 3, a first guide pipe 61 is provided at the bottom of the lower semicircular pipe, the first guide pipe 61 is connected with the seepage pipe 7, the distance between the lower semicircular pipe and the outer wall of the side pipe 3 is 5 cm, the collecting barrel 5 is a transparent barrel, a second guide pipe 51 is provided on the top of the collecting barrel 5, the second guide pipe 51 is connected with the seepage pipe 7, the bottom plate of the collecting barrel 5 is sealed and fixedly connected to the outer wall of the main pipe 2, the distance between the side plate of the collecting barrel 5 and the outer wall of the main pipe is 5 cm, and a wiring port 12 is provided on the outer wall of the protective shell 1 at a position corresponding to the heating wire 8.

Claims

1. A heat-insulating and leak-proof wellhead Christmas tree device, characterized in that: The invention comprises a Christmas tree body (4), wherein the Christmas tree body (4) comprises a main pipeline (2), wherein the main pipeline (2) is vertically connected to a plurality of side pipelines (3), wherein the main pipeline (2) and each side pipeline (3) are provided with valves, wherein a collecting barrel (5) passes through the main pipeline (2), wherein the collecting barrel (5) is arranged below the valve of the main pipeline (2), wherein a collecting pipe (6) is sleeved at the valve of each side pipeline (3), wherein the outer walls of the collecting pipe (6) and the collecting barrel (5) are provided with heating wires (8), wherein a protective shell (1) is sleeved on the outer side of the Christmas tree body (4), wherein the interior of the protective shell (1) is provided with heat-insulating cotton (9), wherein the heat-insulating cotton (9) contacts the outer walls of the main pipeline (2) and the side pipeline (3).

2. The heat-insulating and leak-proof wellhead Christmas tree device according to claim 1, characterized in that: Observation windows (11) are provided on both sides of the protective shell (1), and a seepage pipe (7) is provided on the side of the protective shell (1) away from the valve.

3. The heat-insulating and leak-proof wellhead Christmas tree device according to claim 2, characterized in that: The collecting pipe (6) comprises an upper semicircular pipe and a lower semicircular pipe, the upper semicircular pipe is fixedly connected to the lower semicircular pipe, the length of the lower semicircular pipe is greater than that of the upper semicircular pipe, the upper semicircular pipe is aligned with one end of the lower semicircular pipe close to the main pipe (2), the upper semicircular pipe is welded to the outer wall of the side pipe (3), the lower semicircular pipe is provided with a groove (62) that matches the valve of the side pipe (3), the bottom of the lower semicircular pipe is provided with a first guide pipe (61), the first guide pipe (61) is connected to the seepage pipe (7), and the distance between the lower semicircular pipe and the outer wall of the side pipe (3) is 3 cm to 5 cm.

4. The heat-insulating and leak-proof wellhead Christmas tree device according to claim 2, characterized in that: The collecting barrel (5) is a transparent barrel. A second flow guide tube (51) is provided on the top of the collecting barrel (5). The second flow guide tube (51) is connected to the seepage tube (7).

5. The heat-insulating and leak-proof wellhead Christmas tree device according to claim 1, characterized in that: The bottom plate of the collecting barrel (5) is sealed and fixedly connected to the outer wall of the main pipeline (2), and the distance between the side plate of the collecting barrel (5) and the outer wall of the main pipeline is 3 cm to 5 cm.

6. The heat-insulating and leak-proof wellhead Christmas tree device according to claim 1, characterized in that: The outer wall of the protective shell (1) is provided with a wiring port (12) at a position corresponding to the heating wire (8).

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