Novel three-dimensional ribbed tube double-layer stab-resistant high-pressure joint

Abstract

The novel three-dimensional ribbed tube double-layer puncture-proof high-pressure connector comprises a connector body, a high-pressure protective sleeve is coaxially arranged outside the connector body, a cylindrical annular structure is formed between the high-pressure protective sleeve and the wall of the connector body, and an intelligent pressure gauge is installed on the high-pressure protective sleeve; a plurality of layers of three-dimensional fins are evenly distributed on the inner circumferential wall of the outlet section of the connector body at intervals, at least two puncture-proof cambered surface structures are arranged in the inlet section of the connector body from bottom to top at intervals, the two puncture-proof cambered surface structures are inverted bowl-shaped bodies, the top faces of the bowl-shaped bodies are concave downwards to form spherical crown-shaped faces, and the top faces of the bowl-shaped bodies are provided with through holes. A plurality of second-level oil guide holes are formed in the periphery of the top face of the second-level puncture-proof cambered surface structure and the bowl wall of the bowl-shaped body, a plurality of first-level oil guide holes are formed in the periphery of the top face of the first-level puncture-proof cambered surface structure, and three-dimensional fins are evenly distributed on the inner wall of the bowl-shaped body of the first-level puncture-proof cambered surface structure at intervals.

Description

Technical Field

[0001] The invention relates to a novel three-dimensional ribbed tube double-layer puncture-proof high-pressure joint, belonging to the technical field of rear-end pipeline puncture-proof joints of oilfield wellhead regulating valves. Background Art

[0002] Currently, some heavy oil, extra-heavy oil, and SAGD wells in my country's oil fields experience excessive pressure during drilling. This high-speed sand flow in the crude oil can cause punctures in pipelines downstream of the wellhead regulating valve, leading to oil leaks and shutting down production. These punctures also pollute the environment. Cleaning up extra-heavy oil is difficult and expensive, leading to well downtime and impacting crude oil production. Extra-heavy oil requires steam heating to reduce viscosity and increase flow rate, but pipeline punctures result in significant heat loss. Summary of the Invention

[0003] The purpose of the present invention is to provide a new type of three-dimensional ribbed tube double-layer puncture-proof high-pressure joint, which can completely solve the problem of puncture of the rear-end pipeline of the wellhead regulating valve, prevent crude oil leakage and environmental pollution, enable the normal operation of the oil well, increase crude oil production, and reduce heat loss.

[0004] The technical solution adopted to achieve the purpose of the present invention is: a new type of three-dimensional ribbed tube double-layer puncture-proof high-pressure joint, including a joint body, a high-pressure protective sleeve coaxially arranged on the outside of the joint body, a cylindrical annular structure formed between the high-pressure protective sleeve and the wall of the joint body, and an intelligent pressure gauge installed on the high-pressure protective sleeve; a plurality of layers of three-dimensional ribs are evenly distributed and spaced on the inner circumferential wall of the outlet section of the joint body, and the three-dimensional ribs are distributed within the range of 1 / 2 of the inner wall length of the joint body; at least two puncture-proof arc surface structures are spaced from bottom to top in the inlet section of the joint body. The lower one is the first-level anti-stab arc surface structure, and the upper one is the second-level anti-stab arc surface structure. Both anti-stab arc surface structures are inverted bowl-shaped bodies, and the top surfaces of the bowl-shaped bodies are concave to form spherical crown surfaces, wherein the radius of the upper spherical crown surface is smaller than the radius of the lower spherical crown surface. Several second-level oil guide holes are arranged at intervals on the top surface periphery of the second-level anti-stab arc surface structure and the bowl wall of the bowl-shaped body, and several first-level oil guide holes are arranged at intervals on the top surface periphery of the first-level anti-stab arc surface structure. Three-dimensional ribs are evenly distributed on the inner wall of the bowl-shaped body of the first-level anti-stab arc surface structure.

[0005] Working Principle: After drilling for ultra-heavy oil, the wellhead pressure is high, the crude oil carries sand, and a lot of sand is produced. The crude oil enters the connector body through the rear end of the wellhead regulating valve, encounters the three-dimensional fins, and generates vortex disturbances. It flows into the first-level anti-puncture arc surface structure and diffuses first. After passing through the first-level oil guide hole, it enters the second-level anti-puncture arc surface structure and diffuses. It then flows out through the second-level oil guide hole and then flows into the pipeline through the three-dimensional ribbed tube in the outlet section of the connector body, which generates vortex disturbances. For oil wells with severe sand production, a high-pressure protective sleeve is added to the outside of the three-dimensional ribbed tube anti-puncture high-pressure connector. An annulus is formed between the protective sleeve and the three-dimensional ribbed tube anti-puncture high-pressure connector. An intelligent pressure monitoring instrument is installed outside the protective sleeve to monitor the pipe wall pressure of the three-dimensional ribbed tube double-layer anti-puncture high-pressure connector at any time and determine whether the first layer of the pipe wall is punctured. During normal operation, the annular pressure of the protective sleeve is 0 MPa. If the monitored annular pressure of the protective sleeve is consistent with the pipeline pressure, it indicates that the wall of the 3D-ribbed double-layer puncture-resistant high-pressure joint has been punctured. In this case, the 3D-ribbed double-layer puncture-resistant high-pressure joint has not affected oil well production, but it must be replaced within one week to prevent oil leaks, environmental pollution, and reduced oil production. The 3D-ribbed double-layer puncture-resistant high-pressure joint has quick connectors installed at both ends, making replacement easy and complete in just over ten minutes. To replace the 3D-ribbed double-layer puncture-resistant high-pressure joint, simply switch the pipeline production to the bypass valve, close the inlet and outlet valves, depressurize the pipeline, replace the 3D-ribbed double-layer puncture-resistant high-pressure joint, repair the inlet and outlet valves, open the process, close the bypass valve, and resume oil well production. The new 3D-ribbed double-layer puncture-resistant high-pressure joint can be used in oilfield high-pressure oil and gas wells, as well as in ultra-heavy oil (SAGD) well drilling, where high pressure and high sand content are present in the oil and gas.

[0006] Intelligent pressure detection system: The intelligent pressure detection system can directly monitor the pressure of the double-layer protective sleeve of the three-dimensional ribbed pipe of each oil well. When the pipe wall is punctured, the pressure changes, and the signal is transmitted to the central control room through the automated remote transmission system. The central control room automatically alarms, and then the relevant personnel quickly deal with it and replace the relevant equipment in time.

[0007] The new three-dimensional ribbed, double-layer, puncture-resistant, high-pressure joint has proven effective in oilfield applications. It has completely resolved the issue of pipeline punctures behind wellhead regulating valves, preventing environmental pollution from crude oil leaks, enabling the normal operation of oil wells, increasing crude oil production, and reducing heat loss. This device has been highly recognized by on-site technicians for its energy-saving benefits and significant reduction in oilfield production costs.

[0008] Continuous fins, ribs, grooves, etc. are processed inside or outside the tube. When the fluid flows through this type of rough surface, the speed along the height and flow direction varies, forming a binary flow; and when the ribs and grooves are disconnected along the groove direction, these rough elements become independent protrusions or pits. When the fluid passes through these protrusions or pits, a ternary flow is formed, which is called three-dimensional rib technology. The three-dimensional internal and external finned tube belongs to the fourth generation of heat exchange technology. It is an integrated processing technology that overcomes the contact thermal resistance generated by the conventional heat exchanger using welding to expand the heat exchange surface. The three-dimensional fin tube includes three-dimensional external fin tube, three-dimensional internal fin tube, and three-dimensional internal and external fin tube. Its heat transfer performance is far superior to the current fin tube, threaded tube, corrugated tube, sand-type rough tube and other enhanced heat transfer technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 2 for Figure 1 AA cross-sectional structural diagram in; Figure 3 for Figure 1 BB cross-sectional structure diagram in; Figure 4 for Figure 1 Schematic diagram of the CC cross-section structure. DETAILED DESCRIPTION

[0010] A new type of three-dimensional ribbed double-layer puncture-proof high-pressure joint, such as Figure 1 、 2As shown in Figures 3 and 4, it includes a joint body 7, a high-pressure protection sleeve 12 is coaxially arranged on the outside of the joint body 7, a cylindrical annulus structure is formed between the high-pressure protection sleeve 12 and the wall of the joint body, and an intelligent pressure gauge 13 is installed on the high-pressure protection sleeve; the intelligent pressure gauge 13 has a data acquisition and remote transmission function, which can collect the pressure in the environmental control structure of the joint body 7 in real time to ensure safe production. The outlet section 2 of the connector body is evenly and spaced apart on its inner circumference, with several layers of three-dimensional fins 1 spaced across the length of the inner wall of the connector body. Within the inlet section of the connector body, at least two stab-proof curved surface structures are spaced apart from each other from bottom to top: the lower one is a primary stab-proof curved surface structure 5, and the upper one is a secondary stab-proof curved surface structure 3. Both stab-proof curved surface structures are inverted bowl-shaped bodies, with their top surfaces concavely forming spherical caps. The radius of the upper spherical cap 9 is smaller than that of the lower spherical cap 6. Several secondary oil guide holes 11 and 10 are spaced apart along the top circumference of the secondary stab-proof curved surface structure 3 and along the bowl wall. Several primary oil guide holes 4 are spaced apart along the top circumference of the primary stab-proof curved surface structure 5. Three-dimensional fins 8 are evenly spaced along the inner wall of the bowl of the primary stab-proof curved surface structure 5. The diameter of the primary oil guide hole 4 is larger than that of the secondary oil guide holes 11 and 10. The distance between the two anti-stab arc surface structures 3 and 5 is not less than the inner diameter of the connector body 7.

[0011] The forming and manufacturing processes of the three-dimensional rib tube and the three-dimensional fins in the three-dimensional rib tube are both existing technologies and will not be described in detail here.

Claims

1. A novel three-dimensional ribbed tube double-layer puncture-proof high-pressure joint, including a joint body, characterized by: A high-pressure protective sleeve is coaxially arranged on the outside of the joint body, and a cylindrical annular structure is formed between the high-pressure protective sleeve and the wall of the joint body, and an intelligent pressure gauge is installed on the high-pressure protective sleeve; several layers of three-dimensional fins are evenly distributed and spaced on the inner circumferential wall of the outlet section of the joint body, and the three-dimensional fins are distributed within the range of 1 / 2 of the inner wall length of the joint body; at least two stab-proof arc surface structures are spaced from bottom to top in the inlet section of the joint body, of which the lower one is a first-level stab-proof arc surface structure, and the upper one is a second-level stab-proof arc surface structure. Both stab-proof arc surface structures are inverted bowl-shaped bodies, and the top surfaces of the bowl-shaped bodies are concave to form spherical crown surfaces, wherein the radius of the upper spherical crown surface is smaller than the radius of the lower spherical crown surface, and several second-level oil guide holes are respectively spaced on the top surface periphery of the second-level stab-proof arc surface structure and the bowl wall of the bowl-shaped body, and several first-level oil guide holes are respectively spaced on the top surface periphery of the first-level stab-proof arc surface structure, and three-dimensional fins are evenly spaced on the inner wall of the bowl-shaped body of the first-level stab-proof arc surface structure.

2. The novel three-dimensional ribbed tube double-layer puncture-proof high-pressure joint according to claim 1 is characterized by: The aperture of the first-stage oil guide hole is larger than the aperture of the second-stage oil guide hole.

3. The novel three-dimensional ribbed tube double-layer puncture-proof high-pressure joint according to claim 1 is characterized by: The distance between the two anti-stab arc surface structures is not less than the inner diameter of each connector body.

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