Ultrahigh pressure 210MPa integral pipeline crossing device

Abstract

The invention discloses an ultrahigh pressure 210MPa integral type pipeline crossing device which comprises a pair of integral type crossing cutting sleeve joints, and each integral type crossing cutting sleeve joint comprises a front cutting sleeve, a rear cutting sleeve, a cutting sleeve joint and a gland nut; the clamping sleeve connectors are used for being connected with pipelines, in the using process, the pair of integral penetrating clamping sleeve connectors is installed in a channel of a tubing hanger assembly, the clamping sleeve connectors are screwed into the channel of the tubing hanger assembly, the rear clamping sleeve and the front clamping sleeve are sequentially pressed into the channel of the tubing hanger assembly, and the gland nuts are screwed into inner holes of the clamping sleeve connectors. Through tightening, the clamping sleeve joint is extruded and deformed to clamp a channel of the tubing hanger assembly; a pipeline penetrates through the front clamping sleeve, the rear clamping sleeve, the clamping sleeve connector and the gland nut in the pair of integral penetrating clamping sleeve connectors, and the gland nut is tightened after installation to prevent looseness. The integral sealing structure design is adopted, the stability and reliability of connection are improved, and the high pressure of 210 MPa can be borne.

Description

Technical Field

[0001] The invention relates to the technical field of oil pipe hanging and pipeline crossing, and in particular to an integrated pipeline crossing device capable of stably working in a 210MPa high pressure environment. Background Art

[0002] In the high-pressure fluid delivery system of the oil pipe hanging downhole safety valve control pipeline, reliable pipeline connection is crucial. The ferrule joints currently on the market often have problems such as insufficient sealing, insufficient connection strength, and complex installation under high-pressure environments. With the continuous development of industrial technology, the performance requirements for high-pressure pipeline connection joints are getting higher and higher, especially in the field of some ultra-high pressure 210Mpa wellhead devices, a crossing device that can withstand 210MPa high pressure is needed.

[0003] The conventional crossing device relies on NPT thread seal, which may easily cause leakage of the downhole safety valve control pipeline under high pressure, thus posing a safety hazard.

[0004] Chinese invention patent application publication number CN114458219A discloses an electric submersible pump cable wellhead crossing device and crossing method for 370℃ thermal recovery wells, wherein the head end of the cable / hydraulic control pipeline hanger is connected to the lifting short section, the tail end of the cable / hydraulic control pipeline hanger is connected to the head end of the insulated oil pipe, the cable / hydraulic control pipeline hanger is seated at the wellhead, the tail end of the high-temperature power cable passes through the cable / hydraulic control pipeline hanger and is fixed to the outer wall of the insulated oil pipe through a reverse coupling shield, the head end of the high-temperature power cable is located on the upper surface of the cable / hydraulic control pipeline hanger, the tail end of the insulated oil pipe extends into the oil pipe head, a through hole is opened on the side wall of the oil pipe head and passes through the side wall of the oil pipe head, and a pipe head tee is installed at the through hole to form a cable crossing channel. By passing the cable through the side of the tubing head, the high temperature area of ​​the wellhead tubing hanger and the flange under the oil tree is avoided during steam injection, so that the high temperature power cable with a temperature resistance of 250°C can be used in the high temperature heavy oil thermal recovery well at 370°C. This patent cannot withstand the high pressure of 210MPa.

[0005] China utility model patent authorization announcement number CN222122467U provides a double-sealed double-ferrule pipe joint, which includes a connector, the inner cavity of the connector is provided with a plug hole and a flow hole for pipe connection, the flow hole is connected with the plug hole, one side of the inner cavity of the connector is provided with a connection hole, one side of the inner cavity of the connection hole is set in an inverted cone shape, one side of the connector is provided with a nut, the inner cavity of the connection hole is provided with a first ferrule, one side of the first ferrule is provided with a second ferrule, the surface of the second ferrule contacts the inner cavity of the nut, the inner cavity of the nut is provided with a sealing groove, and the sealing groove is set in an annular shape. The double-sealed double-ferrule pipe joint provided by the utility model solves the problems that the existing single-ferrule pipe joint has no temperature difference compensation function, is prone to leakage after repeated disassembly and assembly, cannot be repeatedly interchanged, requires special tools for assembly, has poor assembly consistency, and has poor impact and vibration resistance. The connection of this patent adopts NPT thread sealing, and the maximum working pressure is 70MPa. Summary of the invention

[0006] In view of the above shortcomings, the purpose of the present invention is to provide an ultra-high pressure 210MPa integrated pipeline crossing device to solve the problem of high-pressure pipeline connection in the prior art.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0008] An ultra-high pressure 210MPa integral pipeline crossing device comprises a pair of integral crossing ferrule joints, each integral crossing ferrule joint comprises a front ferrule, a rear ferrule, a ferrule joint and a gland nut; the ferrule joint is used to connect the pipeline, and the ferrule joint has an inner hole for the pipeline to pass through. When in use, the pair of integral crossing ferrule joints are installed in the channel of the oil pipe hanger assembly, wherein the ferrule joint is screwed into the channel of the oil pipe hanger assembly and the rear ferrule and the front ferrule are pressed into the channel of the oil pipe hanger assembly in sequence, and the gland nut is screwed into the inner hole of the ferrule joint, and the channel of the oil pipe hanger assembly is clamped by tightening the ferrule joint to squeeze and deform it; the pipeline passes through the front ferrule, the rear ferrule, the ferrule joint and the gland nut in the pair of integral crossing ferrule joints, and the gland nut is tightened after installation to prevent loosening.

[0009] In a preferred embodiment of the present invention, the rear ferrule is a metal seal made of stainless steel; the outer shape of the rear ferrule is a cylindrical frustum structure, and the rear ferrule has an inner hole. The rear ferrule is installed in an annular groove on the inner wall of the channel of the oil pipe hanger assembly. Through the extrusion deformation of the tightening ferrule joint, the cylindrical frustum structure of the rear ferrule can fit tightly on the channel surface of the oil pipe hanger assembly to form a reliable seal.

[0010] In a preferred embodiment of the present invention, the front ferrule is an integral structure, made of high-strength stainless steel material; the periphery of the front ferrule is a conical structure, which fits tightly with the inner wall of the channel of the oil pipe hanger assembly, and has an inner hole for the pipeline to pass through, which can tightly clamp the pipeline during installation.

[0011] In a preferred embodiment of the present invention, the gland nut is a three-piece structure, which is convenient for being put on from the outside of the pipeline and screwed into the inner hole of the compression fitting after the compression fitting is installed to prevent the pipeline from loosening.

[0012] In a preferred embodiment of the present invention, the ferrule joint is made of high-strength alloy steel material, and an external thread is provided at one end of the ferrule joint connected to the channel of the tubing hanger assembly to facilitate connection with the internal thread of the channel of the tubing hanger assembly.

[0013] Due to the adoption of the above technical solution, the present invention has the following characteristics: (1) The integral structural design improves the stability and reliability of the connection. (2) The use of special materials and manufacturing processes can withstand a high pressure of 210 MPa. (3) The optimized sealing structure ensures no leakage under high pressure. (4) Easy installation and improved work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the use of the ultra-high pressure 210MPa integrated pipeline crossing device of the present invention.

[0015] Figure 2 for Figure 1 An enlarged schematic diagram of point I.

[0016] Figure 3 It is a schematic structural diagram of a ferrule joint in an integral through ferrule joint of the present invention.

[0017] Figure 4 It is a schematic structural diagram of the front ferrule in the integral through ferrule joint of the present invention.

[0018] Figure 5 It is a schematic structural diagram of the rear ferrule in the integral through-ferrule joint of the present invention.

[0019] Figure 6 It is a schematic structural diagram of the gland nut in the integral through-ferrule joint of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] See also Figures 1 to 6, an ultra-high pressure 210MPa integral pipeline crossing device shown in the figure includes a pair of integral crossing ferrule joints 100, each integral crossing ferrule joint 100 includes a front ferrule 110, a rear ferrule 120, a ferrule joint 130 and a gland nut 140.

[0022] The ferrule joint 130 is made of high-strength alloy steel and has been subjected to a special heat treatment process to improve its strength and toughness. The entire ferrule joint 130 is cylindrical in shape, and has an inner hole 131 for the pipeline 200 to pass through. The inner hole 131 is a full-diameter structure for the pipeline 200 to pass through as a whole. An external thread 132 is provided at the lower end of the ferrule joint 130 to facilitate connection with the internal thread 311 in the channel 310 of the tubing hanger assembly 300.

[0023] The front ferrule 110 is an integral structure made of high-strength stainless steel. The periphery of the front ferrule 110 is a cylindrical cone structure so as to fit tightly with the inner wall of the channel 310 of the oil pipe hanger assembly 300. The interior of the front ferrule 110 has an inner hole 111 for the pipeline 200 to pass through. The inner hole 111 is a full-diameter structure for passing the pipeline 200, facilitating the insertion of the pipeline 200 and tightly clamping the pipeline 200 during installation.

[0024] The rear ferrule 120 is a metal seal, made of stainless steel, and has good 210MPa high pressure resistance. The rear ferrule 120 has a cylindrical frustum structure and an inner hole 121, which is installed in the annular groove 320 on the inner wall of the channel 310 of the tubing hanger assembly 300. Through the extrusion deformation of the tightening ferrule joint 130, the cylindrical frustum structure of the rear ferrule 120 can fit tightly on the surface of the channel 310 of the tubing hanger assembly 300 to form a reliable seal.

[0025] The gland nut 140 is a three-piece structure, which is convenient for being put on from the outside of the pipeline and screwed into the inner hole 131 of the ferrule joint 130 after the ferrule joint 130 is installed, so as to prevent the pipeline 200 from loosening.

[0026] When in use, a pair of integral through-ferrule joints 100 are installed at both ends of the channel 310 of the oil pipe hanger assembly 300, wherein the ferrule joint 130 is screwed into the channel 310 of the oil pipe hanger assembly 300 and the rear ferrule 120 and the front ferrule 110 are pressed into the channel 310 of the oil pipe hanger assembly 300 in sequence, and the sealing member is the rear ferrule 120, which is arranged between the front ferrule 110 and the ferrule joint 130 to play a sealing role.

[0027] The gland nut 140 is screwed into the inner hole 131 of the ferrule joint 130, and the ferrule joint 130 is squeezed and deformed by tightening to clamp the channel 310 of the oil pipe hanger assembly 300; the pipeline 200 passes through a pair of front ferrules 110, rear ferrules 120, ferrule joints 130 and gland nut 140 in an integral through ferrule joint 100. After installation, the gland nut 140 is tightened to prevent loosening.

Claims

1. An ultra-high pressure 210MPa integrated pipeline crossing device, characterized in that: It comprises a pair of integral through-ferrule joints, each of which comprises a front ferrule, a rear ferrule, a ferrule joint and a gland nut; the ferrule joint is used to connect the pipeline, and the ferrule joint has an inner hole for the pipeline to pass through. When in use, the pair of integral through-ferrule joints are installed in the channel of the oil pipe hanger assembly, wherein the ferrule joint is screwed into the channel of the oil pipe hanger assembly and the rear ferrule and the front ferrule are pressed into the channel of the oil pipe hanger assembly in sequence, and the gland nut is screwed into the inner hole of the ferrule joint, and the ferrule joint is squeezed and deformed by tightening to clamp the channel of the oil pipe hanger assembly; the pipeline passes through the front ferrule, the rear ferrule, the ferrule joint and the gland nut in the pair of integral through-ferrule joints, and the gland nut is tightened after installation to prevent loosening.

2. The ultra-high pressure 210 MPa integrated pipeline crossing device according to claim 1, characterized in that: The rear ferrule is a metal seal made of stainless steel; the outer shape of the rear ferrule is a cylindrical frustum structure, and the rear ferrule has an inner hole. The rear ferrule is installed in the annular groove on the inner wall of the channel of the oil pipe hanger assembly. Through the extrusion deformation of the tightening ferrule joint, the cylindrical frustum structure of the rear ferrule can fit tightly on the channel surface of the oil pipe hanger assembly to form a reliable seal.

3. The ultra-high pressure 210 MPa integrated pipeline crossing device according to claim 2, characterized in that: The front ferrule is an integral structure, made of high-strength stainless steel; the periphery of the front ferrule is a conical structure, which fits tightly with the inner wall of the channel of the oil pipe hanger assembly, and has an inner hole inside for the pipeline to pass through, which can tightly clamp the pipeline during installation.

4. The ultra-high pressure 210 MPa integrated pipeline crossing device according to claim 3, characterized in that: The gland nut is a three-piece structure, which is convenient for being put on from the outside of the pipeline and screwed into the inner hole of the compression fitting after the compression fitting is installed, so as to prevent the pipeline from loosening.

5. The ultra-high pressure 210 MPa integrated pipeline crossing device according to claim 4, characterized in that: The ferrule joint is made of high-strength alloy steel material, and one end of the ferrule joint connected to the channel of the oil pipe hanger assembly is provided with an external thread to facilitate connection with the internal thread of the channel of the oil pipe hanger assembly.

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