Quick-change type ultra-high pressure throttling well control manifold

Abstract

This invention discloses a quick-change ultra-high pressure throttling and kill manifold, comprising three planar channels arranged in the same plane: a first channel, comprising a first gate valve, a first multi-port, and a second gate valve connected in sequence; a second channel, comprising a third gate valve, a first throttling valve, a first buffer pipe, a second multi-port, a fourth gate valve, a second throttling valve, and a second buffer pipe connected in sequence; and a third channel, comprising a fifth gate valve, a third throttling valve, a third buffer pipe, a third multi-port, a sixth gate valve, a fourth throttling valve, and a fourth buffer pipe connected in sequence; the second and third channels are respectively located on opposite sides of the first channel; the first, third, and fifth gate valves are all connected to the inlet multi-port, and the second gate valve, the second buffer pipe, and the fourth buffer pipe are all connected to the outlet multi-port; the outlet multi-port is also connected to a seventh gate valve. This invention solves the problem of well pressure runaway caused by untimely switching of manifolds or replacement of valves.

Description

Technical Field

[0001] This invention relates to the field of choke and kill manifold technology. More specifically, this invention relates to a quick-change ultra-high pressure choke and kill manifold. Background Technology

[0002] In oil and gas well control operations, choke and kill manifolds are used for well pressure control. Well pressure control generally requires adjusting the choke valve opening and, in conjunction with manual judgment, adjusting the fluid pressure to an appropriate range within a short time. During pressure control, due to pipe blockage or erosion, it is necessary to switch manifolds or choke channels. The adjustment time is long, which can easily lead to well pressure loss of control. Moreover, this requires the reserve of multiple sets of spare manifolds or multiple spare choke channels, resulting in high manifold costs, large size, and low efficiency. Existing technologies mostly use lifting bases and adjusting supports to adjust and install the overall height of the manifold, but they cannot achieve the adjustment and online reconfiguration of the internal structure of the manifold to expand its functions and provide more redundant channels to cope with the risk of commonly used channels losing functionality due to malfunctions during well control operations. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] To achieve these and other advantages of the present invention, a quick-change ultra-high pressure choke kill manifold is provided, comprising three planar channels disposed in the same plane, wherein the three planar channels are respectively: The first channel includes a first gate valve, a first multi-way valve, and a second gate valve connected in sequence. The second channel includes a third gate valve, a first throttle valve, a first buffer tube, a second multi-port, a fourth gate valve, a second throttle valve, and a second buffer tube connected in sequence. The third channel includes a fifth gate valve, a third throttle valve, a third buffer tube, a third multi-port, a sixth gate valve, a fourth throttle valve, and a fourth buffer tube connected in sequence. The second channel and the third channel are respectively located on both sides of the first channel; the first gate valve, the third gate valve and the fifth gate valve are all connected to the inlet multi-port, and the second gate valve, the second buffer pipe and the fourth buffer pipe are all connected to the outlet multi-port; the outlet multi-port is also connected to a seventh gate valve.

[0005] Preferably, it also includes three vertical channels arranged in the same plane, the three vertical channels being: The fourth channel includes, in sequence from bottom to top, an eighth gate valve, a rotary joint, a telescopic joint, and a fourth multi-port; The fifth channel includes, in sequence from bottom to top, a ninth gate valve, a first quick connector, and a fifth multi-port; The sixth channel includes, in sequence from bottom to top, a tenth gate valve, a second quick connector, and a sixth multi-port; The eighth gate valve is connected to the first multi-port valve, the ninth gate valve is connected to the second multi-port valve, and the tenth gate valve is connected to the third multi-port valve; the fifth and sixth multi-port valves are respectively connected to the fourth multi-port valve through connecting pipes.

[0006] Preferably, the inlet multi-port and the outlet multi-port are also connected to an eleventh gate valve and a twelfth gate valve, respectively, and a pressure gauge and a pressure sensor are connected to both the eleventh gate valve and the twelfth gate valve.

[0007] Preferably, both the first quick connector and the second quick connector adopt the same quick connector structure, the quick connector structure including: The upper connector has a central flow channel that runs vertically through the center; the lower end of the upper connector has two stepped upper sealing surfaces, and a connector sealing ring is provided on each of the two upper sealing surfaces. The lower connector has a through-cavity in its center, which includes a guide cavity, a mounting cavity, and a lower central flow channel arranged sequentially from top to bottom. The lower end of the mounting cavity has two lower sealing surfaces that mate with the upper sealing surface. The middle part of the outer wall of the lower connector is recessed inward to form an annular groove, and the outer wall surfaces of the outer connector located above and below the annular groove are the first outer wall surface and the second outer wall surface, respectively. A piston tube is slidably fitted onto the lower connector, and a cavity is formed between the inner wall of the piston tube and the annular groove. An upper sealing ring is provided between the inner wall of the piston tube and the first outer wall surface, and a first lower sealing ring and a second lower sealing ring are respectively provided at the upper and lower ends of the piston tube and the second outer wall surface. A locking block is movably disposed within the cavity. A guide slope is provided on the side of the locking block facing the piston tube. A spring and a locking tooth are sequentially connected to the side of the locking block facing the lower connector. A locking tooth groove corresponding to the locking tooth is provided on the outer wall of the upper connector. A window communicating with the inner cavity is correspondingly opened on the side wall of the annular groove, and the locking tooth passes through the window. A protrusion is provided on the inner wall of the piston tube corresponding to the locking block. A guide tube has a through guide hole at its center; the guide tube includes a first section and a second section arranged sequentially from bottom to top, the outer diameter of the first section being smaller than the outer diameter of the second section; the first section is fixedly inserted into the guide cavity, and a lower sealing ring is provided between the outer wall of the first section and the inner wall of the guide cavity; the upper end of the piston tube is slidably connected to the second section, and an upper sealing ring is provided between the inner wall of the upper end of the piston tube and the outer wall of the second section; in the space formed by the lower connector, the guide tube, and the piston tube, a closed locking cavity is formed between the upper sealing ring, the lower sealing ring, and the upper sealing ring of the piston tube, and an unlocking cavity is formed between the first lower sealing ring and the second lower sealing ring of the piston tube; a locking port and an unlocking port communicating with the locking cavity and the unlocking cavity are respectively provided on the outer wall of the piston tube.

[0008] Preferably, the lower connector also has a test chamber, an observation chamber, and a ventilation chamber; the test chamber extends from the outer wall of the lower connector to the lower sealing surface, the observation chamber extends from the outer wall of the lower connector to the inner wall of the mounting chamber located below the lower sealing surface, and the ventilation chamber extends from the outer wall of the outer connector to the inner wall of the mounting chamber located above the lower sealing surface.

[0009] Preferably, the lower connector is further provided with an interlocking cavity, which extends from the outer wall of the lower connector to communicate with the lower central flow channel.

[0010] Preferably, the quick connector further includes a hydraulic valve block, which internally has a first flow channel, a second flow channel, a third flow channel, and a fourth flow channel; the first flow channel extends to the surface of the hydraulic valve block at both ends to form a locking inlet and a locking outlet; the second flow channel extends to the surface of the hydraulic valve block at both ends to form a test inlet and a test outlet; the third flow channel extends to the surface of the hydraulic valve block at both ends to form an unlocking inlet and an unlocking outlet; a locking check valve is provided on the first flow channel, and an interlocking check valve is provided on the third flow channel; the two ends of the fourth flow channel are respectively connected to the locking check valve and the interlocking check valve, and the hydraulic valve block has an interlocking inlet communicating with the fourth channel; the locking inlet, the unlocking inlet, and the test inlet are all connected to a pressure pump, the locking outlet is connected to the locking port, the unlocking outlet is connected to the unlocking port, the test outlet is connected to the test chamber, and the interlocking inlet is connected to the interlocking chamber.

[0011] Preferably, the guide hole includes a first hole section and a second hole section respectively corresponding to the first pipe section and the second pipe section; the second hole section is a flared opening with a gradually decreasing diameter, and the minimum diameter is not less than the diameter of the mounting cavity; the diameter of the first hole section is the same as the diameter of the mounting cavity; and an annular boss extends horizontally outward from the outer periphery of the second pipe section.

[0012] The present invention has at least the following beneficial effects: 1. The quick-change ultra-high pressure throttling and kill manifold provided by the present invention forms a series of venting channels and multiple pressure control throttling channels through the connection and combination of quick connectors, multiple gate valves and multiple throttling valves. It solves the problem of well pressure runaway caused by untimely switching of manifolds or replacement of valves under ultra-high pressure (not less than 175MPa) conditions. It can also solve the problem of high cost, large size and low operation efficiency of manifolds caused by multiple sets of backup manifolds or multiple backup throttling channels.

[0013] 2. The quick-change ultra-high pressure throttling and kill manifold provided by the present invention has a quick-connect structure that drives the connection, locking and disconnection of the upper and lower connectors through the axial movement of the piston tube, resulting in high connection efficiency, compact structure and small space occupation.

[0014] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0015] Figure 1 This is a top view of the quick-change ultra-high pressure throttling and kill manifold described in this invention; Figure 2 for Figure 1 Schematic diagram of the AA section structure; Figure 3 for Figure 2 Schematic diagram of the DD section structure in the diagram; Figure 4 for Figure 1 Schematic diagram of the CC section structure in the diagram; Figure 5 for Figure 1 Schematic diagram of the BB section structure; Figure 6 This is a schematic diagram of the structure of the quick connector in the present invention when the upper connector and the lower connector are connected and locked. Figure 7 for Figure 6 A magnified view of a section at point E in the middle; Figure 8 This is a schematic diagram of the structure of the quick connector described in this invention when the upper and lower connectors are detached; Figure 9 for Figure 8A magnified view of a section at point F in the middle; Figure 10 This is a schematic diagram of the upper and lower connectors in the quick connector structure described in this invention when they are unlocked; Figure 11 This is a schematic diagram of the internal structure of the hydraulic valve block described in this invention; Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0017] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] like Figures 1 to 5 This invention provides a quick-change ultra-high voltage throttling and kill manifold, comprising three planar channels arranged in the same plane, wherein the three planar channels are: The first channel 1 includes a first gate valve 11, a first multi-port valve 12, and a second gate valve 13 connected in sequence. The second channel 2 includes a third gate valve 21, a first throttle valve 22, a first buffer tube 23, a second multi-port 24, a fourth gate valve 25, a second throttle valve 26, and a second buffer tube 27 connected in sequence. The third channel 3 includes a fifth gate valve 31, a third throttle valve 32, a third buffer tube 33, a third multi-port 34, a sixth gate valve 35, a fourth throttle valve 36, and a fourth buffer tube 37 connected in sequence. The second channel 2 and the third channel 3 are respectively located on both sides of the first channel 1; the first gate valve 11, the third gate valve 21 and the fifth gate valve are all connected to the inlet multi-port, and the second gate valve 13, the second buffer pipe and the fourth buffer pipe are all connected to the outlet multi-port; the outlet multi-port is also connected to the seventh gate valve 8.

[0019] In this technical solution, the first channel 1 is used for blowout control and pressure control operations, and the second channel 2 is the commonly used throttling and pressure control channel. The openings of the two throttling valves (the first throttling valve 22 and the second throttling valve 26) in the second channel 2 are set according to the bottom hole pressure. When the bottom hole pressure does not exceed 175 MPa, the second throttling valve 26 in the second channel 2 is fully open, and the first throttling valve 22 is partially open. The opening of the first throttling valve 22 is adjusted to control the bottom hole pressure for primary throttling and pressure control operations. If the bottom hole pressure exceeds 175 MPa, the second throttling valve 26 in the second channel is partially open, and the first throttling valve 22 is partially open, maintaining the opening of the second throttling valve 26 greater than that of the first throttling valve 22. Simultaneously, the openings of the first throttling valve 22 and the second throttling valve 26 are adjusted for secondary throttling and pressure control operations. When one or both of the first throttling valve 22 and the second throttling valve 26 malfunction and lose their throttling function, the second channel 2 is closed, and the third channel 3 is activated. Based on the bottom hole pressure, the opening degrees of the two throttle valves (the third throttle valve 32 and the fourth throttle valve 36) in the third channel 3 are set respectively. When the bottom hole pressure does not exceed 175 MPa, the fourth throttle valve 36 in the third channel 3 is fully open, and the third throttle valve 32 is half-open. The opening degree of the third throttle valve 32 is adjusted to control the bottom hole pressure for the first-stage throttling pressure control operation. If the bottom hole pressure exceeds 175 MPa, the fourth throttle valve 36 is half-open, and the third throttle valve 32 is half-open, maintaining the opening degree of the fourth throttle valve 36 greater than that of the first throttle valve 22. At the same time, the opening degrees of the third throttle valve 32 and the fourth throttle valve 36 are adjusted for the second-stage throttling pressure control operation. It should be noted that half-open throttle valves mean that the throttle valves are not in a fully open or fully closed state. The inlet multi-port serves as the main fluid inlet. The first channel 1, second channel 2, and third channel 3 are independent and not interconnected, ultimately converging and connecting to the outlet multi-port. The outlet multi-port connects to the seventh gate valve 8 as the main fluid outlet. Furthermore, the quick-change ultra-high pressure throttling and kill manifold also includes three vertical channels arranged in the same plane. These three vertical channels are: The fourth channel 4 includes an eighth gate valve 44, a rotary joint 43, a telescopic joint 42, and a fourth multi-port 41 connected sequentially from bottom to top; The fifth channel 5 includes a ninth gate valve 54, a first quick connector 53, and a fifth multi-port 52 connected sequentially from bottom to top; The sixth channel 6 includes a tenth gate valve 64, a second quick connector 63, and a sixth multi-port 62 connected sequentially from bottom to top; The eighth gate valve 44 is connected to the first multi-port 12, the ninth gate valve 54 is connected to the second multi-port 24, and the tenth gate valve 64 is connected to the third multi-port 34; the fifth multi-port 52 and the sixth multi-port 62 are respectively connected to the fourth multi-port 41 through connecting pipes.

[0020] The fourth channel 4, the fifth channel 5, and the sixth channel 6 are interconnected via connecting pipe 51, connecting pipe 61, and the fourth multi-port 41. When the first throttle valve 22 of the second channel 2 malfunctions, causing a loss of throttling function, the first throttle valve 22 of the second channel is isolated by closing the third gate valve 21, connecting the second throttle valves 26 of the fourth channel 4, the fifth channel 5, and the second channel 2, closing the remaining channels, and adjusting the opening of the second throttle valve 26 of the second channel 2 to control the pressure at the bottom of the well for primary throttling and pressure control operations. When both the second throttle valve 26 and the first throttle valve 22 simultaneously lose their throttling function due to a malfunction, the second channel 2 is closed, and the third channel 3 is activated. When the second throttle valve 26 and the first throttle valve 22 of the second channel 2, and the first third throttle valve 32 of the third channel 3 simultaneously lose their throttling function due to a malfunction, the second channel 2 is closed. The first third throttle valve 32 of the third channel 3 is isolated by closing the fifth gate valve 31 of the third channel. The fourth channel 4, the sixth channel 6, and the second fourth throttle valve 36 of the third channel 3 are then connected. The remaining channels are closed, and the opening of the second fourth throttle valve 36 of the third channel 3 is adjusted to control the pressure at the bottom of the well for primary throttling and pressure control operations. In another technical solution, the inlet multi-port and the outlet multi-port are also connected to an eleventh gate valve 7 and a twelfth gate valve 9, respectively. Pressure gauges 10 and pressure sensors 11 are connected to both the eleventh gate valve 7 and the twelfth gate valve 9. The pressure at the total inlet and total outlet of the manifold is detected through the pressure gauges 10 and pressure sensors 11 on the eleventh gate valve 7 and the twelfth gate valve 9.

[0021] The specific usage process of the quick-change ultra-high pressure throttling and well-killing manifold is as follows: Operating Condition 1: When the formation pressure is ≤175MPa, during shallow formation operations, close the second channel 2, the third channel 3, the fourth channel 4, the fifth channel 5, and the sixth channel 6, and then open the seventh gate valve 8, the twelfth gate valve 9, the second gate valve 13, the first gate valve 11, and the eleventh gate valve 7 in sequence. At this time, the first channel 1 is fully open, and the release pressure control operation can be carried out until the values ​​of the pressure gauge 10 and the pressure sensor 11 return to the design values. Then, close the first gate valve 11 and the second gate valve 13 in sequence to end the release pressure control operation.

[0022] Operating Condition 2: When the formation pressure is ≤175MPa, during shallow formation operations, after closing the first channel 1, the third channel 3, the fourth channel 4, the fifth channel 5, and the sixth channel 6, open the second throttle valve 26 to full open, the fourth gate valve 25 to full open, the first throttle valve 22 to half open (50% opening), and the third gate valve 21 to full open in sequence. At this time, the second channel of the throttle and kill manifold is open. The opening of the first throttle valve 22 can be adjusted according to the formation pressure until the values ​​of the pressure gauge 10 and the pressure sensor 11 return to the design values. Then, close the third gate valve 21 and the fourth gate valve 25 in sequence to end the throttle and pressure control operation.

[0023] When the formation pressure is >175MPa, during deep formation operations, after closing the first channel 1, the third channel 3, the fourth channel 4, the fifth channel 5, and the sixth channel 6, the second throttle valve 26 is opened to half-open (75% opening), the fourth gate valve 25 is opened to fully open, the first throttle valve 22 is opened to half-open (50% opening), and the third gate valve 21 is opened to fully open. At this time, the second channel 2 is open. The opening of the first throttle valve 22 and the second throttle valve 26 can be adjusted according to the formation pressure until the values ​​of the pressure gauge 10 and the pressure sensor 11 are restored to the design values. Then, the third gate valve 21 and the fourth gate valve 25 are closed to end the throttling and pressure control operation.

[0024] Operating Condition 3: When the first throttling valve 22 of the second channel experiences problems such as valve stem breakage or valve core erosion leading to loss of throttling function, and when the formation pressure is ≤175MPa, during shallow formation operations, after closing the third channel 3 and the sixth channel 6, close the third gate valve 21 of the second channel 2 and the second gate valve 13 of the first channel 1. Open the first gate valve 11 of the first channel 1, the eighth gate valve 44 of the fourth channel 4, and the ninth gate valve 54 of the fifth channel 5. Open the fourth gate valve 25 of the second channel 2 to full open, and the second throttling valve 26 of the second channel 2 to half open (50%). The opening of the second throttling valve 26 can be adjusted according to the formation pressure until the values ​​of the pressure gauge 10 and the pressure sensor 11 return to the design values. Then, close the ninth gate valve 54, the eighth gate valve 44, and the first gate valve 11 in sequence to end the throttling and pressure control operation.

[0025] When the first throttle valve 22 of the second channel experiences problems such as valve stem breakage or valve core erosion leading to loss of throttling function, and the formation pressure is >175MPa, during deep formation operations, after closing the first channel 1 and the fourth channel 4, close the third gate valve 21 of the second channel 2 and the sixth gate valve 35 of the third channel 3. Open the tenth gate valve 64 of the sixth channel 6, the ninth gate valve 54 of the fifth channel, and the fifth gate valve 31 of the third channel 3. Open the third throttle valve 32 of the third channel 3 to half-open (50% opening), the fourth gate valve 25 of the second channel 2 to fully open, and the second throttle valve 26 of the second channel to half-open (75%). The opening of the third throttle valve 32 and the second throttle valve 26 can be adjusted according to the formation pressure until the values ​​of the pressure gauge 10 and the pressure sensor 11 return to appropriate values. Then, close the ninth gate valve 54, the tenth gate valve 64, and the fifth gate valve 31 in sequence to end the throttling and pressure control operation.

[0026] Operating Condition 4: When the third gate valve 21 of the second channel 2 is damaged and cannot be closed, or when the first throttle valve 22 and the second throttle valve 26 simultaneously experience problems such as valve stem breakage or valve core erosion, resulting in loss of throttle function, or when ice blockage occurs in the second channel 2 during the throttle pressure control process, the entire second channel 2 is closed and the third channel 3 is activated.

[0027] When the formation pressure is ≤175MPa, during shallow formation operations, close the first channel 1, the second channel 2, the fourth channel 4, the fifth channel 5, and the sixth channel 6, then sequentially open the fourth throttle valve 36 to full open, the sixth gate valve 35 to full open, the third throttle valve 32 to half open (50% opening), and the fifth gate valve 31 to full open. At this time, the third channel of the throttling and pressure control manifold is open. The opening of the third throttle valve 32 can be adjusted according to the formation pressure until the values ​​of pressure gauge 10 and pressure sensor 11 return to the design values. Then, sequentially close the fifth gate valve 31 and the sixth gate valve 35 to end the throttling and pressure control operation.

[0028] When the formation pressure is >175MPa, during deep formation operations, after closing the first channel 1, the second channel 2, the fourth channel 4, the fifth channel 5, and the sixth channel 6, open the fourth throttle valve 36 to half-open (75% opening), the sixth gate valve 35 to fully open, the third throttle valve 32 to half-open (50% opening), and the fifth gate valve 31 to fully open in sequence. At this time, the third channel 3 is open. The opening of the third throttle valve 32 and the fourth throttle valve 36 can be adjusted in sequence according to the formation pressure until the values ​​of the pressure gauge 10 and the pressure sensor 11 return to the appropriate range. Then, close the fifth gate valve 31 and the sixth gate valve 35 in sequence to end the throttling and pressure control operation.

[0029] Operating Condition 5: When the third gate valve 21 in the second channel is damaged and cannot be closed, or when the first throttle valve 22 and the second throttle valve 26 simultaneously experience problems such as valve stem breakage or valve core erosion, resulting in loss of throttle function, or when ice blockage occurs in the second channel 2 during the throttle pressure control process, and the third throttle valve 32 in the third channel 3 experiences problems such as valve stem breakage or valve core erosion, resulting in loss of throttle function, the entire second channel 2 shall be closed, and the fifth gate valve 31 in the third channel 3 shall be closed.

[0030] When the formation pressure is ≤175MPa, during shallow formation operations, after closing the fifth channel 5 and the second channel 2, close the second gate valve 13 of the first channel 1 and the fourth gate valve 25 of the second channel 2. Open the first gate valve 11 of the first channel 1, the eighth gate valve 44 of the fourth channel 4, and the tenth gate valve 64 of the sixth channel 6. Open the sixth gate valve 35 of the third channel 3 to full open, and the fourth throttle valve 36 of the third channel 3 to half open (50%). The opening of the fourth throttle valve 36 can be adjusted according to the formation pressure until the values ​​of the pressure gauge and pressure sensor return to the design values. Then, close the first gate valve 11, the tenth gate valve 64, and the sixth gate valve 35 in sequence to end the throttling and pressure control operation.

[0031] When the formation pressure is >175MPa, during deep formation operations, after closing the fifth channel 5 and the second channel 2, close the second gate valve 13 of the first channel 1 and the fourth gate valve 25 of the second channel 2. Open the first gate valve 11 of the first channel 1, the eighth gate valve 44 of the fourth channel 4, and the tenth gate valve 64 of the sixth channel 6. Open the sixth gate valve 35 of the third channel 3 to full open, and the fourth throttle valve 36 of the third channel 3 to half open (85%). The opening of the fourth throttle valve 36 can be adjusted according to the formation pressure until the values ​​of the pressure gauge 10 and the pressure sensor 11 return to the design values. Then, close the first gate valve 11, the tenth gate valve 64, and the sixth gate valve 35 in sequence to end the throttling and pressure control operation.

[0032] Operating Condition 6: When the second channel 2 experiences problems such as the third gate valve 21 being damaged and unable to close, or the first throttle valve 22 and the second throttle valve 26 simultaneously experiencing problems such as valve stem breakage and valve core erosion leading to loss of throttle function, or when ice blockage occurs in the second channel 2 during the throttle pressure control process, and when the third channel 3 experiences problems such as the fifth gate valve 31 being damaged and unable to close, or the third throttle valve 32 and the fourth throttle valve 36 simultaneously experiencing problems such as valve stem breakage and valve core erosion leading to loss of throttle function, or when ice blockage occurs in the third channel 3 during the throttle pressure control process, the entire second channel 2 and the third channel 3 shall be closed.

[0033] Close the first channel 1, the fourth channel 4, the fifth channel 5, and the sixth channel 6. Control the extension of the expansion joint 42 via the hydraulic system, and simultaneously control the unlocking and disconnection of the first quick joint 53 and the second quick joint 63. Use a crane or boom to rotate the rotary joint 43 90°, replace the damaged valve, and repair the manifold.

[0034] In another technical solution, both the first quick connector 53 and the second quick connector 63 adopt the same quick connector structure 100, such as... Figures 6 to 11 As shown, the quick connector structure 100 includes: The upper connector 110 has an upper central flow channel 111 that runs vertically through its center; the lower end of the upper connector 110 is provided with two stepped upper sealing surfaces 113, and each of the two upper sealing surfaces 113 is provided with a connector sealing ring 114. The lower connector 150 has a through-cavity at its center, which includes a guide cavity 156, a mounting cavity 157, and a lower central flow channel 158 arranged sequentially from top to bottom. The lower end of the mounting cavity 157 is provided with two lower sealing surfaces 155 that mate with the upper sealing surface 113. The outer wall of the lower connector 150 is recessed inward to form an annular groove 1502, and the outer wall surfaces of the outer connector 150 located above and below the annular groove are the first outer wall surface 1501 and the second outer wall surface 1503, respectively. A piston tube 130 is slidably sleeved on the lower connector 150, and a cavity is formed between the inner wall of the piston tube 130 and the annular groove 1502. An upper piston tube sealing ring 173 is provided between the inner wall of the piston tube 130 and the first outer wall surface 1501, and a first lower piston tube sealing ring 174 and a second lower piston tube sealing ring 175 are respectively provided at the upper and lower ends of the second outer wall surface 1503. A locking block 140 is movably disposed within the cavity. A guide slope 141 is provided on the side of the locking block facing the piston tube. A spring 142 and a locking tooth 143 are sequentially connected to the side of the locking block 140 facing the lower connector 150. A locking tooth groove corresponding to the locking tooth 143 is provided on the outer wall of the upper connector 110. A window communicating with the inner cavity is correspondingly opened on the side wall of the annular groove, and the locking tooth 143 passes through the window. A protrusion is provided on the inner wall of the piston tube corresponding to the locking block. A guide tube 120 has a guide hole extending vertically through its center. The guide tube 120 includes a first tube segment 121 and a second tube segment 122 arranged sequentially from bottom to top. The outer diameter of the first tube segment 121 is smaller than the outer diameter of the second tube segment 122. The first tube segment 121 is fixedly inserted into the guide cavity 156, and a guide tube lower sealing ring 172 is provided between the outer wall surface of the first tube segment 121 and the inner wall surface of the guide cavity 156. The upper end of the piston tube 130 is slidably connected to the second tube segment 122, and the inner wall surface of the upper end of the piston tube 130 is flush with the inner wall surface of the guide cavity 156. A guide tube upper sealing ring 171 is provided between the outer wall surfaces of the second pipe section 122; in the space formed by the lower connector 150, the guide tube 120 and the piston tube 130, a closed locking cavity is formed between the guide tube upper sealing ring 171, the guide tube lower sealing ring 172 and the piston tube upper sealing ring 173, and an unlocking cavity is formed between the piston tube first lower sealing ring 174 and the piston tube second lower sealing ring 175; a locking port 131 and an unlocking port 132 communicating with the locking cavity and the unlocking cavity are respectively provided on the outer wall of the piston tube 130.

[0035] Due to assembly tolerances, there are minute gaps between the piston tube 130, the guide tube 120, and the lower connector 150. There is also a gap between the guide tube 120 and the lower connector 150. In the space formed after the three are connected, the upper sealing ring 171 of the guide tube, the lower sealing ring 172 of the guide tube, and the upper sealing ring 173 of the piston tube together form a closed locking cavity, and the first lower sealing ring 174 and the second lower sealing ring 175 of the piston tube together form an unlocking cavity.

[0036] When the upper connector 110 is inserted into the mounting cavity 157 of the lower connector 150, the upper sealing surface 113 and the lower sealing surface 155 are in contact, but the connector sealing ring 114 is not compressed. Hydraulic oil is injected into the locking port 131, flowing into the locking cavity and pushing the piston tube 130 downward relative to the lower connector 150. At the same time, the protrusion pushes the locking block 140 towards the lower connector 130 along the guide slope of the locking block 140. Due to the restriction of the window, the locking block 140 can only move horizontally and cannot move vertically with the piston tube 130. During the movement of the locking block 140, the locking teeth 143 gradually approach the locking groove on the upper connector 110 until they are completely pressed together. Then, the upper connector 110 moves further downward and sits into the mounting cavity 157 until the connector sealing ring 114 is compressed and forms a seal, realizing the connection and locking of the upper connector 110 and the lower connector 150. During this process, the unlocking port 132 is closed. During unlocking, the high-pressure fluid in the throttling and kill manifold is emptied, and hydraulic oil is no longer injected through the locking port 131. Instead, hydraulic oil is introduced into the unlocking chamber through the unlocking port 132, pushing the piston tube 130 upward. The protrusion gradually moves away from the guide slope 141 of the locking block 140, and the locking tooth 143 disengages from the locking tooth groove of the upper connector 110 under the action of the spring 142. The upper connector 110 and the lower connector 150 are then unlocked and disconnected. Preferably, the angle α between the upwardly inclined guide tooth surface and the central axis in the locking tooth groove is greater than 45°, which helps to reduce the friction of the guide tooth surface and speed up the locking operation. The angle β between the downwardly inclined mating tooth surface and the central axis is less than 45°, which increases the friction and reduces the tendency of the mating tooth surface to slip.

[0037] Furthermore, the lower connector 150 is also provided with a test chamber 154, an observation chamber 153, and a ventilation chamber 151. The test chamber 154 extends from the outer wall of the lower connector 150 to the lower sealing surface 155; the observation chamber 153 extends from the outer wall of the lower connector 150 to the inner wall of the mounting cavity 157 located below the lower sealing surface 155; and the ventilation chamber 151 extends from the outer wall of the outer connector 150 to the inner wall of the mounting cavity 157 located above the lower sealing surface 155. The test chamber 154 connects the area between the two sealing surfaces and is used to test whether the upper connector 110 has been set in the predetermined position. Hydraulic oil is injected into the test chamber 154, and the connection between the upper connector 110 and the lower connector 150 is observed through the observation chamber 156 and the ventilation chamber 151 to check for leaks.

[0038] Furthermore, the lower connector 150 is also provided with an interlocking cavity 152, which extends from the outer wall of the lower connector 150 to communicate with the lower central flow channel 158.

[0039] In another technical solution, such as Figure 6 and Figure 11 As shown, the quick-connect structure also includes a hydraulic valve block 160, which has a first flow channel 161, a second flow channel 162, a third flow channel 163, and a fourth flow channel 164 inside. The first flow channel 161 extends to the surface of the hydraulic valve block at both ends to form a locking inlet 1611 and a locking outlet 1612. The second flow channel 162 extends to the surface of the hydraulic valve block at both ends to form a test inlet 1621 and a test outlet 1622. The third flow channel 163 extends to the surface of the hydraulic valve block at both ends to form an unlocking inlet 1631 and an unlocking outlet 1634. A locking check valve 1613 is provided on the first flow channel 161. An interlocking check valve 1633 is provided on the three-channel 163; the two ends of the fourth channel 164 are respectively connected to the locking check valve 1613 and the interlocking check valve 1633; the hydraulic valve block 160 is provided with an interlocking inlet 1641 that communicates with the fourth channel 164; the locking inlet 1611, the unlocking inlet 1631 and the test inlet 1621 are all connected to the hydraulic pump; the locking outlet 1612 is connected to the locking port 131; the unlocking outlet 1634 is connected to the unlocking port 132; the test outlet 1622 is connected to the test chamber 154; and the interlocking inlet 1641 is connected to the interlocking chamber 152.

[0040] The locking inlet 1611, the unlocking inlet 1631, and the test inlet 1621 are all connected to the first hydraulic pump to input hydraulic oil into the locking port 131, the unlocking port 132, and the test chamber 154. The locking inlet 1611 and the unlocking inlet 1631 are input with general pressurized hydraulic oil, and the hydraulic oil pressure input into the test inlet 1621 is the same as the rated working pressure of the high-pressure fluid in the lower connector during the sealing stage of the test quick connector.

[0041] When the quick-connect structure 100 is connected, the hydraulic pump of the hydraulic system supplies oil to the hydraulic valve block 160. The hydraulic oil flows in through the locking inlet 1611, flows through the locking check valve 1613 and the locking outlet 1612, and then enters the locking port 131 and the locking chamber, thereby driving the piston tube 130 to move down until the joint sealing ring 114 is compressed and sealed, thus completing the connection between the upper joint 110 and the lower joint 150.

[0042] Then, a connection sealing test is performed on the quick-connect structure 100. Specifically, the hydraulic oil supply to the locking inlet 1611 is paused, and oil is supplied to the test inlet 1621. This hydraulic oil needs to be pressurized by a high-pressure pump to a pressure not lower than the rated working pressure of 175 MPa for the choke kill manifold fluid. The ultra-high pressure hydraulic oil flows through the test outlet 1622 and enters the test chamber 154. The pressure is maintained for 15 minutes. During the pressure maintenance period, no leakage is observed at the outlets of the observation chamber 156 and the ventilation chamber 151, indicating that the quick-connect structure 100 has passed the connection sealing test and the upper connector 110 has been correctly seated in the appropriate position. If leakage is observed at the outlet of the observation chamber or the ventilation chamber, hydraulic oil needs to be supplied to the locking inlet 1611 until the quick-connect structure 100 passes the connection sealing test and the observation chamber 156 and the ventilation chamber 151 are properly seated.

[0043] After the connection seal test, the hydraulic oil supply to the locking inlet 1611 is stopped, and the quick-connect structure 100 is locked. Specifically, the locking check valve 1613 prevents the hydraulic oil in the locking port 131 from flowing back through the locking outlet 1612, keeping the locking port 131 at high pressure to ensure that the piston tube 130 remains in the locked position. At the same time, the hydraulic oil pressure at the test inlet 1621 is always maintained, but the hydraulic oil pressure needs to be reduced to 15% of the rated working pressure of the throttling manifold fluid. This pressure is only used for the preload between the locking teeth in the locking block 140 and the locking tooth groove of the upper connector 110 to prevent potential slippage of the tooth surface. Simultaneously, the high-pressure fluid in the throttling and kill manifold enters the interlocking check valve 1633 and the locking check valve 1613 through the interlocking chamber 152 and the interlocking inlet 1641, keeping the interlocking check valve 1633 and the locking check valve 1613 always closed. This ensures that the unlocking inlet 1631 and the unlocking outlet 1634 are separated, with the locking port 131 always under pressure and the unlocking port always without pressure, ensuring that the quick-connect structure 100 remains locked. Figure 6 As shown.

[0044] During unlocking, the high-pressure fluid in the throttling and kill manifold is first emptied, and the pressure of the high-pressure fluid in the upper connector 110 is zero. The high-pressure fluid that originally entered the interlocking check valve 1633 and the locking check valve 1613 through the interlocking chamber 152 flows back. The interlocking check valve 1633 and the locking check valve 1613 are fully opened, and the unlocking inlet 1631 and the unlocking outlet 1634 are connected. Hydraulic oil enters the unlocking port 132 and the unlocking chamber. The hydraulic oil in the locking port 131 flows back, pushing the piston tube 130 upward, and the quick connector structure 100 is unlocked.

[0045] In another technical solution, the guide hole includes a first hole section and a second hole section respectively corresponding to the first pipe section 121 and the second pipe section 22; the second hole section is a flared opening with a gradually decreasing diameter, and the minimum diameter is not less than the diameter of the mounting cavity 157; the diameter of the first hole section is the same as the diameter of the mounting cavity 157; an annular boss 123 extends horizontally outward from the outer periphery of the second pipe section. The upper connector 110 is inserted into the lower connector 150 through the guide hole, and the boss 121 is used to limit the piston tube 130. When the piston tube 130 moves upward to fit against the bottom surface of the boss 121, the quick connector structure is unlocked. Figure 10 As shown.

[0046] In the aforementioned quick-change ultra-high pressure choke and kill manifold, both the rotary joint 43 and the telescopic joint 42 adopt conventional rotary joint and telescopic joint structures used in the art. Before the choke and kill manifold is put into operation, it needs to be connected to the top of the fourth channel using a crane boom or other lifting tools. The hydraulic system simultaneously supplies oil to the retraction inlet of the telescopic joint and the locking ports of the quick joints on both sides. After the retraction of the telescopic joint and the locking of the quick joints are completed, the choke and kill manifold begins to operate.

[0047] When the choke kill manifold needs maintenance and disassembly due to valve failure or other reasons, the choke kill manifold stops working and needs to be connected to the top of the fourth channel using a crane or other lifting tools. The hydraulic system simultaneously supplies oil to the extension inlet of the telescopic joint and the unlocking ports of the quick connectors on both sides. After the extension of the telescopic joint and the unlocking of the quick connectors are completed, the rotary joint is rotated 90°, and the choke kill manifold can be disassembled and maintained.

[0048] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A quick-change ultra-high voltage throttling and kill manifold, characterized in that, This includes three planar channels arranged in the same plane, and the three planar channels are as follows: The first channel includes a first gate valve, a first multi-way valve, and a second gate valve connected in sequence. The second channel includes a third gate valve, a first throttle valve, a first buffer tube, a second multi-port, a fourth gate valve, a second throttle valve, and a second buffer tube connected in sequence. The third channel includes a fifth gate valve, a third throttle valve, a third buffer tube, a third multi-port, a sixth gate valve, a fourth throttle valve, and a fourth buffer tube connected in sequence. The second channel and the third channel are respectively located on both sides of the first channel; the first gate valve, the third gate valve and the fifth gate valve are all connected to the inlet multi-port, and the second gate valve, the second buffer pipe and the fourth buffer pipe are all connected to the outlet multi-port; the outlet multi-port is also connected to a seventh gate valve.

2. The quick-change ultra-high pressure throttling and kill manifold as described in claim 1, characterized in that, It also includes three vertical channels arranged in the same plane, the three vertical channels being: The fourth channel includes, in sequence from bottom to top, an eighth gate valve, a rotary joint, a telescopic joint, and a fourth multi-port; The fifth channel includes, in sequence from bottom to top, a ninth gate valve, a first quick connector, and a fifth multi-port; The sixth channel includes, in sequence from bottom to top, a tenth gate valve, a second quick connector, and a sixth multi-port; The eighth gate valve is connected to the first multi-port valve, the ninth gate valve is connected to the second multi-port valve, and the tenth gate valve is connected to the third multi-port valve; the fifth and sixth multi-port valves are respectively connected to the fourth multi-port valve through connecting pipes.

3. The quick-change ultra-high voltage throttling and kill manifold as described in claim 1, characterized in that, The inlet multi-port and the outlet multi-port are also respectively connected to an eleventh gate valve and a twelfth gate valve, and pressure gauges and pressure sensors are connected to the eleventh gate valve and the twelfth gate valve.

4. The quick-change ultra-high voltage throttling and kill manifold as described in claim 2, characterized in that, Both the first quick connector and the second quick connector adopt the same quick connector structure, which includes: The upper connector has a central flow channel that runs vertically through the center; the lower end of the upper connector has two stepped upper sealing surfaces, and a connector sealing ring is provided on each of the two upper sealing surfaces. The lower connector has a through-cavity in its center, which includes a guide cavity, a mounting cavity, and a lower central flow channel arranged sequentially from top to bottom. The lower end of the mounting cavity has two lower sealing surfaces that mate with the upper sealing surface. The middle part of the outer wall of the lower connector is recessed inward to form an annular groove, and the outer wall surfaces of the outer connector located above and below the annular groove are the first outer wall surface and the second outer wall surface, respectively. A piston tube is slidably fitted onto the lower connector, and a cavity is formed between the inner wall of the piston tube and the annular groove. An upper sealing ring is provided between the inner wall of the piston tube and the first outer wall surface, and a first lower sealing ring and a second lower sealing ring are respectively provided at the upper and lower ends of the piston tube and the second outer wall surface. A locking block is movably disposed within the cavity. A guide slope is provided on the side of the locking block facing the piston tube. A spring and a locking tooth are sequentially connected to the side of the locking block facing the lower connector. A locking tooth groove corresponding to the locking tooth is provided on the outer wall of the upper connector. A window communicating with the inner cavity is correspondingly opened on the side wall of the annular groove, and the locking tooth passes through the window. A protrusion is provided on the inner wall of the piston tube corresponding to the locking block. A guide tube has a through guide hole at its center; the guide tube includes a first section and a second section arranged sequentially from bottom to top, the outer diameter of the first section being smaller than the outer diameter of the second section; the first section is fixedly inserted into the guide cavity, and a lower sealing ring is provided between the outer wall of the first section and the inner wall of the guide cavity; the upper end of the piston tube is slidably connected to the second section, and an upper sealing ring is provided between the inner wall of the upper end of the piston tube and the outer wall of the second section; in the space formed by the lower connector, the guide tube, and the piston tube, a closed locking cavity is formed between the upper sealing ring, the lower sealing ring, and the upper sealing ring of the piston tube, and an unlocking cavity is formed between the first lower sealing ring and the second lower sealing ring of the piston tube; a locking port and an unlocking port communicating with the locking cavity and the unlocking cavity are respectively provided on the outer wall of the piston tube.

5. The quick-change ultra-high voltage throttling and kill manifold as described in claim 4, characterized in that, The lower connector also has a test chamber, an observation chamber, and a ventilation chamber. The test chamber extends from the outer wall of the lower connector to the lower sealing surface. The observation chamber extends from the outer wall of the lower connector to the inner wall of the mounting chamber located below the lower sealing surface. The ventilation chamber extends from the outer wall of the outer connector to the inner wall of the mounting chamber located above the lower sealing surface.

6. The quick-change ultra-high voltage throttling and kill manifold as described in claim 5, characterized in that, The lower connector is also provided with an interlocking cavity, which extends from the outer wall of the lower connector to communicate with the lower central flow channel.

7. The quick-change ultra-high voltage throttling and kill manifold as described in claim 6, characterized in that, The quick connector also includes a hydraulic valve block, which has a first flow channel, a second flow channel, a third flow channel, and a fourth flow channel inside. The first flow channel extends to the surface of the hydraulic valve block at both ends to form a locking inlet and a locking outlet. The second flow channel extends to the surface of the hydraulic valve block at both ends to form a test inlet and a test outlet. The third flow channel extends to the surface of the hydraulic valve block at both ends to form an unlocking inlet and an unlocking outlet. A locking check valve is provided on the first flow channel, and an interlocking check valve is provided on the third flow channel. The two ends of the fourth flow channel are respectively connected to the locking check valve and the interlocking check valve. An interlocking inlet communicating with the fourth channel is provided on the hydraulic valve block. The locking inlet, the unlocking inlet, and the test inlet are all connected to a pressure pump. The locking outlet is connected to the locking port, the unlocking outlet is connected to the unlocking port, the test outlet is connected to the test chamber, and the interlocking inlet is connected to the interlocking chamber.

8. The quick-change ultra-high voltage throttling and kill manifold as described in claim 4, characterized in that, The guide hole includes a first hole section and a second hole section respectively corresponding to the first pipe section and the second pipe section; the second hole section is a flared mouth with a gradually decreasing diameter, and the minimum diameter is not less than the diameter of the mounting cavity; the diameter of the first hole section is the same as the diameter of the mounting cavity; the outer periphery of the second pipe section has an annular boss extending horizontally outward.

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