Wellhead connected temperature control system

Abstract

The present invention relates to a wellhead equipment for oil fields, in particular to a wellhead connected temperature control system. It comprises a vertical shell, a horizontal shell, the installation axis of the casing production control device and the axis of the vertical shell in the length direction are in a cross structure, the axis of the oil pipe production control device and the axis of the vertical shell in the length direction are in a cross structure; the cross section of the vertical shell and the cross section of the vertical cylinder are in a through structure; the lower end of the vertical shell is connected to the horizontal shell, the first casing in the casing production control device is installed near the lower end of the vertical shell, the diameter of the first casing is connected to the vertical shell, the second casing in the oil pipe production control device is installed near the upper end of the vertical shell, the diameter of the second casing is connected to the vertical shell; the production pipeline placed in the vertical shell is connected to the inner diameter of the first casing and the inner diameter of the second casing respectively. It has the advantages of heat preservation of the wellhead of the shutdown well, fast heating, stable temperature operation, power saving, and replacement of medium frequency and electric heating belts.

Description

Technical Field

[0001] The invention relates to oilfield wellhead equipment, in particular to a wellhead communication temperature rise control system. Background Art

[0002] With the development of the thick well block in the oil field, a large number of new wells have been put into production, and the rapid increase in production has brought us great challenges in terms of oil reservoirs, wellbore, gathering and transportation, production organization, etc. The existing oil production technology cannot meet the normal production of oil wells, and problems such as high back pressure, poor heating effect, and easy pipe blockage when wells are stopped have followed. At present, pump truck hot washing and self-circulating hot washing pipelines are adopted to reduce the pressure of the gathering and transportation system, and high-frequency and electric heating belts are used to heat the gathering and transportation process with insulation. Although the normal production of oil wells is guaranteed, the power cost of a single well has also risen sharply. Summary of the invention

[0003] The purpose of the present invention is to overcome the problems of high operating costs such as car wash back pressure reduction, medium frequency and electric heating belt heating in the prior art and provide a wellhead heating control system.

[0004] The present invention adopts the following technical solution:

[0005] A wellhead communication temperature rise control system comprises a vertical shell, a horizontal shell, a casing production control device mounted on the vertical shell, an oil pipe production control device, and a production pipeline passing through the vertical shell and the horizontal shell, wherein the installation axis of the casing production control device and the axis of the length direction of the vertical shell are in a cross structure, and the axis of the oil pipe production control device and the axis of the length direction of the vertical shell are in a cross structure; the vertical shell is connected to the vertical cylinder, and the cross section of the vertical shell and the cross section of the vertical cylinder are in a through structure; the lower end of the vertical shell is connected to the horizontal shell, and the horizontal shell is mounted on the horizontal shell; the first casing in the casing production control device is mounted near the lower end of the vertical shell, and the pipe diameter of the first casing is connected to the vertical shell, and the second casing in the oil pipe production control device is mounted near the upper end of the vertical shell, and the pipe diameter of the second casing is connected to the vertical shell; the production pipeline placed in the vertical shell is respectively connected to the inner diameter of the first casing and the inner diameter of the second casing.

[0006] Compared with the prior art, the present invention adopting the above technical scheme has the advantages of fast heating, stable temperature operation, power saving, and replacing medium frequency and electric heating belts for heat preservation of the wellhead of the shutdown well.

[0007] The preferred embodiment of the present invention is:

[0008] The cross-sectional structure of the vertical shell is a large ring structure, and the cross-sectional structure of the vertical cylinder is a small ring structure; the cross-sectional structure of the vertical shell and the cross-sectional structure of the vertical cylinder form an 8-shaped through structure.

[0009] The installation axis of the casing production control device is perpendicular to the axis of the length direction of the vertical shell; the axis of the oil pipe production control device is perpendicular to the axis of the length direction of the vertical shell.

[0010] Both ends of the first casing in the casing production control device extend outside the vertical shell respectively, one end of the first casing is equipped with a first thread plug, the other end of the first casing is connected to the oil production tree, the other end of the first casing is equipped with a first side pipe, the axis of the first side pipe is arranged perpendicular to the axis of the first casing; a first internal thread knot is arranged in the pipe diameter of the first casing.

[0011] Both ends of the second casing in the oil pipe production control device extend outside the vertical shell respectively, one end of the second casing is equipped with a second thread plug, the other end of the second casing is connected to the oil production tree, and the other end of the second casing is equipped with a second side pipe, and the axis of the second side pipe is arranged perpendicular to the axis of the second casing; a second thread structure is arranged in the pipe diameter of the second casing.

[0012] The vertical production pipeline (701) placed in the vertical shell is composed of a first long tube (709), a second long tube (705), a third long tube (704), a first short tube (707) and a second short tube (708). The first long tube (709), the second long tube (705) and the third long tube (704) are arranged in parallel. The first long tube (709) and the second long tube (705) are connected through the first short tube (707), and the second long tube (705) and the third long tube (704) are connected through the second short tube (708); the inner diameter of the first casing is connected to the third long tube (704) through a connecting hole; and the connecting hole on the inner diameter of the second casing is connected to the second long tube (705).

[0013] A check valve is installed on the second long pipe of the production pipeline placed in the vertical shell.

[0014] The vertical housing is filled with antifreeze. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the first casing.

[0017] Figure 3 It is a structural schematic diagram of the present invention.

[0018] Figure 4 yes Figure 3 A-direction view.

[0019] Figure 5 yes Figure 3 The CC view in .

[0020] Figure 6It is a schematic diagram of the connection structure between the production pipeline and the first casing and the second casing.

[0021] Figure 7 yes Figure 6 Top view of the . DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with an embodiment: A wellhead connected temperature rise control system, see attached Figure 1 To Attachment Figure 6 , in the figure: casing production control device 1, one end of the first casing 101, internal thread structure 102, the other end of the first casing 103, the connecting hole 104, the external thread structure 105, the first side pipe 106; oil pipe production control device 2; vertical shell 3; vertical cylinder 4; horizontal shell 5; horizontal cylinder 6; production pipeline 7; vertical production pipeline 701, horizontal production pipeline 702, one-way valve 703, third long pipe 704, second long pipe 705; sampling tube 706, first short tube 707, second short tube 708, first long tube 709.

[0023] The wellhead communication temperature rise control system described in this embodiment is composed of a vertical shell 3 and a horizontal shell 5 connected to the vertical shell 3. The vertical shell 3 and the horizontal shell 5 are respectively mounted on the production pipeline 7. The production pipeline 7 is composed of a vertical production pipeline 701 and a horizontal production pipeline 702. The production pipeline 7 is connected to the liquid supply pipeline. The vertical shell 3 is equipped with a vertical cylinder 4, and the vertical shell 3 and the vertical cylinder 4 are set in the same length. The horizontal shell 5 is connected to the horizontal cylinder 6 below, and the horizontal cylinder 6 and the horizontal shell 5 are set in the same length.

[0024] The vertical housing 3 is provided with a casing production control device and an oil pipe production control device, the oil pipe production control device is arranged near the top of the vertical housing 3, and the casing production control device is arranged near the bottom of the vertical housing 3. In this embodiment, the casing production control device and the oil pipe production control device have the same structure.

[0025] The installation axis of the casing production control device and the axis of the length direction of the vertical shell 3 are in a vertical cross structure, and the axis of the oil pipe production control device and the axis of the length direction of the vertical shell 3 are in a vertical cross structure.

[0026] The vertical shell 3 is connected to the vertical cylinder 4, and the cross section of the vertical shell 3 and the cross section of the vertical cylinder 4 are in an 8-shaped through structure. The vertical cylinder is equipped with antifreeze and an electric rod electrically connected to the outside world, such as Figure 5The structure shown in . The lower end of the vertical shell 3 is connected to the horizontal shell through a section of vertical production pipeline 701. The horizontal shell 5 is equipped with a horizontal cylinder 6, and the cross-section of the horizontal shell 5 and the cross-section of the horizontal cylinder 6 also present an 8-shaped through structure; the horizontal cylinder is also equipped with antifreeze and an electric heating rod electrically connected to the outside. One end of the horizontal shell 5 is connected to the horizontal production pipeline 702. The first sleeve in the casing production control device is installed at a position close to the lower end of the vertical shell. The outer diameter of the first sleeve is welded to the vertical shell 3, and a connecting hole 104 is provided on the first sleeve, and the portion provided with the connecting hole 104 is welded to the second long tube 104.

[0027] The second casing is also provided with a connecting hole, and the connecting part is welded with the second long tube 705. A check valve 703 is provided in the second long tube 705, and the check valve 703 controls the oil in the production pipeline to flow from the oil pipe production control device to the casing production control device, but cannot flow back.

[0028] The vertical production pipeline 701 is composed of a first long tube 709, a second long tube 705, a third long tube 704, a first short tube 707 and a second short tube 708. The first long tube 709, the second long tube 705 and the third long tube 704 are arranged in parallel. The first long tube 709 and the second long tube 705 are connected through the first short tube 707, and the second long tube 705 and the third long tube 704 are connected through the second short tube 708; the inner diameter of the first casing is connected to the third long tube 704 through a connecting hole; the connecting hole on the inner diameter of the second casing is connected to the second long tube 705.

[0029] The inner diameter of the vertical housing 3 is large enough to accommodate the three parallel long tubes 709, the second long tube 705 and the third long tube 704. The diameters of the first long tube 709, the second long tube 705 and the third long tube 704 are equal. The lengths of the first short tube 707 and the second short tube 708 are just suitable for connecting the two long tubes and realizing the turning and parallel arrangement. The vertical housing 3 can be welded with two "3" structures to form an 8-shaped through structure that is sheathed outside the three parallel long tubes.

[0030] The first sleeve outer diameter is connected to the vertical housing 3 by welding. Similarly, the second sleeve outer diameter is also connected to the vertical housing 3 by welding.

[0031] The first casing is provided with an internal thread structure 102, which is connected to the first oil outlet pipe joint; similarly, the second casing is also provided with an internal thread structure, which is connected to the second oil outlet pipe joint.

[0032] The cross-sectional structure of the vertical shell 3 is a large ring structure, and the cross-sectional structure of the vertical cylinder 4 is a small ring structure; Figure 5As shown, the cross-sectional structure of the horizontal shell 5 is also a large ring structure, and the cross-sectional structure of the horizontal cylinder 6 is a small ring structure. The vertical shell 3, the vertical cylinder 4, the horizontal shell 5 and the horizontal cylinder 6 are respectively filled with antifreeze, and the antifreeze has a built-in heating rod.

[0033] Both ends of the first casing in the casing production control device extend to the outside of the vertical shell 3 respectively, one end 101 of the first casing is equipped with a first plug, the other end 103 of the first casing is connected to the oil production tree, and a first side pipe 106 is installed on the other end 103 of the first casing, and the axis of the first side pipe 106 is arranged perpendicular to the axis of the first casing.

[0034] With the same structural arrangement, both ends of the second casing in the oil pipe production control device extend to the outside of the vertical shell 3 respectively, a second plug is installed at one end of the second casing, the other end of the second casing is connected to the Christmas tree, a second side pipe is installed on the other end of the second casing, and the axis of the second side pipe is arranged perpendicular to the axis of the second casing; the first side pipe 106 and the second side pipe are used to install pressure gauges respectively.

[0035] A sampling tube 706 is provided at a portion of the second long tube 705 close to the first short tube 707 . The sampling tube 706 extends to the outside of the vertical shell 3 , and the outer diameter of the sampling tube 706 is connected to the vertical shell.

[0036] This system is installed at the G24-P39 wellhead site, replacing the original wellhead process. The temperature can reach more than 80 degrees on site. The temperature from the wellhead to the end of the process (the original electric heating zone area) is set at 80-75 degrees, and the end is 64 degrees. The scope of application of this system: heavy oil wells, carbon dioxide pressure relief wells, high-pressure gas wells and self-flowing wells.

[0037] In this embodiment, during operation, the system heats the antifreeze liquid through a heating rod based on the principle of heat conduction, thereby increasing the temperature of the oil well output, reducing the operating resistance of the oil well output, and ensuring normal production of the oil well; the system has the characteristics of fast heating and stable operation, and realizes real-time temperature collection and automatic regulation.

Claims

1. A wellhead temperature control system, comprising a vertical shell, a horizontal shell, a casing production control device mounted on the vertical shell, an oil pipe production control device, and a production pipeline passing through the vertical shell and the horizontal shell, characterized in that: The installation axis of the casing production control device and the axis of the vertical shell in the length direction are in a cross structure, and the axis of the tubing production control device and the axis of the vertical shell in the length direction are in a cross structure; the vertical shell is connected to the vertical cylinder, and the cross section of the vertical shell is in a through structure with the cross section of the vertical cylinder; the lower end of the vertical shell is connected to the horizontal shell, and the vertical shell is filled with antifreeze; A horizontal cylinder is mounted on the horizontal shell; the first casing in the casing production control device is mounted near the lower end of the vertical shell, and the diameter of the first casing is connected to the vertical shell; the second casing in the oil pipe production control device is mounted near the upper end of the vertical shell, and the diameter of the second casing is connected to the vertical shell; the production pipeline placed in the vertical shell is connected to the inner diameter of the first casing and the inner diameter of the second casing respectively; The vertical production pipeline (701) placed in the vertical shell is composed of a first long tube (709), a second long tube (705), a third long tube (704), a first short tube (707) and a second short tube (708). The first long tube (709), the second long tube (705) and the third long tube (704) are arranged in parallel. The first long tube (709) and the second long tube (705) are connected through the first short tube (707), and the second long tube (705) and the third long tube (704) are connected through the second short tube (708); the inner diameter of the first casing is connected to the third long tube (704) through a connecting hole; and the connecting hole on the inner diameter of the second casing is connected to the second long tube (705).

2. The wellhead connection temperature rise control system according to claim 1, characterized in that: The cross-sectional structure of the vertical shell is a large ring structure, and the cross-sectional structure of the vertical cylinder is a small ring structure; the cross-sectional structure of the vertical shell and the cross-sectional structure of the vertical cylinder form an 8-shaped through structure.

3. The wellhead connection temperature rise control system according to claim 1, characterized in that: The installation axis of the casing production control device is perpendicular to the axis of the length direction of the vertical shell; the axis of the oil pipe production control device is perpendicular to the axis of the length direction of the vertical shell.

4. The wellhead connection temperature rise control system according to claim 1, characterized in that: Both ends of the first casing in the casing production control device extend outside the vertical shell respectively, one end of the first casing is equipped with a first screw plug, the other end of the first casing is connected to the oil production tree, and the other end of the first casing is equipped with a first side pipe, the axis of the first side pipe is arranged perpendicular to the axis of the first casing; a first internal thread structure is arranged in the pipe diameter of the first casing.

5. The wellhead connection temperature rise control system according to claim 1, characterized in that: Both ends of the second casing in the oil pipe production control device extend outside the vertical shell respectively, one end of the second casing is equipped with a second thread plug, the other end of the second casing is connected to the oil production tree, and the other end of the second casing is equipped with a second side pipe, and the axis of the second side pipe is arranged perpendicular to the axis of the second casing; a second internal thread structure is arranged in the pipe diameter of the second casing.

6. The wellhead connection temperature rise control system according to claim 1, characterized in that: A check valve is installed on the second long pipe of the production pipeline placed in the vertical shell.

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