A coiled tubing blowout preventer module detection system and method of detection

Abstract

The application discloses a continuous pipe blowout preventer box assembly detection system and a detection method thereof. The continuous pipe blowout preventer box assembly detection system comprises a hydraulic system and a hydraulic vibration platform. The blowout preventer box assembly is vertically installed on the vibration end of the hydraulic vibration platform. The blowout preventer box assembly comprises a blowout preventer box and a standard sealing box. The blowout preventer box is provided with two oil ports and two side oil ports. The standard sealing box is provided with two oil ports. The hydraulic vibration platform is provided with an upper oil port and a lower oil port. The upper oil port and the lower oil port of the hydraulic vibration platform, the two oil ports of the standard sealing box and the two oil ports and the two side oil ports of the blowout preventer box are communicated with the hydraulic system. The hydraulic system is used for driving the vibration end of the hydraulic vibration platform to reciprocate vertically and for supplying hydraulic oil to the blowout preventer box and the standard sealing box. The application has the advantages of simple structure and good detection effect.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas extraction equipment, and particularly relates to a detection system and method for a coiled pipe blowout preventer assembly. Background Technology

[0002] Coiled tubing operations use the current wellhead pressure as the working pressure. The blowout preventer (BOP) is the main well control barrier in coiled tubing operations, used to isolate wellbore pressure during coiling and sealing the wellhead while the coiled tubing is in motion. If the BOP fails to seal the high-pressure fluid downhole, the equipment cannot operate normally, and fluid leakage can cause major safety accidents. According to oilfield field operation requirements, the BOP's sealing performance must be tested at certain intervals. Currently, domestic testing of BOP sealing performance is limited to static sealing testing; there is no complete testing device and method for dynamic sealing testing. However, static sealing monitoring (where the coiled tubing BOP assembly remains vertically stationary during testing) has poor testing results and cannot simulate the sealing performance of the BOP when it vibrates up and down at the wellhead. Summary of the Invention

[0003] To address the aforementioned technical problems, one objective of this invention is to provide a continuous tube blowout preventer assembly detection system that is simple in structure, highly integrated, and easy to operate.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a continuous tube blowout preventer assembly testing system, comprising a hydraulic system and a hydraulic vibration platform;

[0005] The continuous tube blowout preventer assembly is installed on the vibrating end of the hydraulic vibration platform;

[0006] The continuous tube blowout preventer assembly includes a blowout preventer, a standard sealing box, and a continuous tube (24). The continuous tube passes through the blowout preventer and the standard sealing box. The blowout preventer (21) and the standard sealing box are connected to the hydraulic system and, under the action of the hydraulic oil provided by the hydraulic system, make sealed contact with the outer wall of the continuous tube.

[0007] The hydraulic system provides hydraulic oil to the hydraulic vibration platform and drives the continuous tube blowout preventer assembly to reciprocate up and down at the vibration end of the hydraulic vibration platform.

[0008] The coiled tubing blowout preventer (BOP) assembly is a commonly used component in oil and gas extraction. Its specific structure is described in detail below to facilitate understanding of the present invention. The coiled tubing BOP assembly includes a BOP to be tested, a coiled tubing, a converter joint, and a standard sealing box (the standard sealing box is a sealing box with defect-free sealing performance). The BOP has two oil ports and two side oil ports. The standard sealing box has two oil ports. The double-headed telescopic cylinder has an upper oil port and a lower oil port. The lower end of the BOP is sealed and connected to the upper end of the converter joint, and the upper end of the standard sealing box is sealed and connected to the lower end of the converter joint. The lower end of the coiled tubing passes through and exits the BOP, converter joint, and standard sealing box in sequence. The two ends of the coiled tubing constitute the two ends of the coiled tubing BOP assembly. The coiled tubing, BOP, converter joint, and standard sealing box together form an annular chamber. The converter joint has a... A fluid injection port runs through the entire assembly of the continuous tube, blowout preventer (BOP), adapter, and standard sealing box. Hydraulic oil is injected into the BOP and standard sealing box through their respective ports, ensuring a tight seal between their inner bores and the outer wall of the continuous tube. (The BOP works by adjusting its internal control pressure to regulate the tightness of the seal (rubber core) between the BOP and the continuous tube, thus achieving a seal against the moving continuous tube. The standard sealing box works similarly.) At this point, the continuous tube, BOP, adapter, and standard sealing box together form a sealed annular chamber. The fluid injection port connects to this sealed chamber, allowing test fluid to be injected into the chamber and the continuous tube BOP assembly to check for leaks and assess the sealing performance.

[0009] The beneficial effects of the above technical solution are as follows: the hydraulic system supplies hydraulic oil to the hydraulic vibration platform, causing the platform to vibrate up and down. Simultaneously, the hydraulic system supplies hydraulic pressure to the standard sealing box to seal the connection between the standard sealing box and the coiled tubing. In addition, the hydraulic system injects hydraulic oil into the blowout preventer (BOP) box to seal the connection between the BOP box and the coiled tubing. Furthermore, the hydraulic system supplies oil to the side port of the BOP box to open or close the side door of the BOP box for easy replacement of its internal rubber core. This simulates the scenario of the coiled tubing BOP box assembly in the working state at the wellhead, allowing for better testing of the BOP box's sealing performance.

[0010] The hydraulic vibration platform described in the above technical solution includes a mounting base, a double-headed telescopic cylinder, and two connecting plates.

[0011] The double-headed telescopic cylinder is vertically arranged and has two telescopic ends that serve as vibration ends. The two connecting plates are horizontally arranged and installed vertically at intervals on the two telescopic ends of the double-headed telescopic cylinder.

[0012] The two connecting plates are respectively connected to the upper and lower ends of the continuous tube, and the double-headed telescopic cylinder extends and retracts to drive the continuous tube blowout preventer assembly to vibrate up and down reciprocally;

[0013] The double-headed telescopic cylinder is connected to the hydraulic system.

[0014] The beneficial effect of the above technical solution is that the continuous tube blowout preventer assembly can be set vertically and its two ends can be fixed to two connecting plates, and the connecting plates and the continuous tube blowout preventer assembly can be driven to vibrate up and down by the double-headed telescopic cylinder.

[0015] The above technical solution includes multiple double-headed telescopic cylinders;

[0016] Multiple dual-head telescopic cylinders are distributed circumferentially at intervals and mounted on the mounting base;

[0017] Each of the two telescopic cylinders has two telescopic ends connected to the two connecting plates respectively;

[0018] Multiple of the aforementioned double-headed telescopic cylinders extend and retract synchronously to drive the continuous pipe blowout preventer assembly to vibrate up and down.

[0019] The beneficial effect of the above technical solution is that it makes the stability of the two connecting plates more stable when they vibrate up and down.

[0020] In the above technical solution, the mounting base is a horizontally arranged annular component, and the continuous tube blowout preventer assembly passes vertically through the inner hole of the mounting base.

[0021] The advantages of the above technical solution are that the installation of multiple double-headed telescopic cylinders is more convenient, and the placement and installation of the continuous pipe blowout preventer assembly are also easier.

[0022] The hydraulic system described in the above technical solution includes an oil tank, an oil supply pump, and four directional valves;

[0023] The blowout preventer has two oil ports and two side oil ports, the standard sealing box has two oil ports, and the hydraulic vibration platform has an upper oil port and a lower oil port. The upper and lower oil ports of the hydraulic vibration platform, the two oil ports of the standard sealing box, and the two oil ports and two side oil ports of the blowout preventer are all connected to the hydraulic system.

[0024] The oil inlet of the oil supply pump is connected to the oil tank;

[0025] The reversing valve has an oil inlet, an oil return port and two working oil ports, and the four reversing valves are respectively the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve;

[0026] The two working ports of the first reversing valve are respectively connected to the two ports of the standard sealing box, the two working ports of the second reversing valve are respectively connected to the two ports of the blowout preventer, and the two working ports of the third reversing valve are respectively connected to the two side ports of the blowout preventer.

[0027] The upper oil port of the hydraulic vibration platform is connected to one working oil port of the fourth directional valve, and the lower oil port of the hydraulic vibration platform is connected to the other working oil port of the fourth directional valve.

[0028] The oil inlets of the four reversing valves are all connected to the oil outlet of the oil supply pump through the main oil supply pipe, and the oil return ports of the four reversing valves are all connected to one end of the oil return pipe, and the other end of the oil return pipe is connected to the oil tank.

[0029] The beneficial effects of the above technical solution are as follows: the working status of the blowout preventer, the standard sealing box and the double-headed telescopic cylinder can be controlled by four directional valves respectively. At the same time, the four directional valves share hydraulic components such as the oil supply pump and the oil tank, which makes the hydraulic system highly integrated and thus reduces costs.

[0030] The hydraulic system described in the above technical solution also includes two filters, one of which is located at the oil inlet of the oil supply pump, and the other of which is located on the oil return pipe.

[0031] The beneficial effect of the above technical solution is that the hydraulic oil entering the oil supply pump and the hydraulic oil returning to the oil tank through the return pipe can be filtered by two filters respectively, so as to prevent the residue in the hydraulic oil from entering the blowout preventer, standard sealing box or double-head telescopic cylinder, thereby avoiding equipment wear or damage.

[0032] The hydraulic system described in the above technical solution also includes a check valve;

[0033] The one-way valve is installed on the main oil supply pipe to prevent hydraulic oil from flowing back to the oil supply pump.

[0034] The beneficial effect of the above technical solution is that it can make the hydraulic system's operating oil pressure more stable.

[0035] The hydraulic system described in the above technical solution also includes a relief valve;

[0036] The oil inlet of the overflow valve is connected to the oil inlets of the four directional valves;

[0037] The outlet of the overflow valve is connected to the return oil pipe or the oil tank.

[0038] The beneficial effect of the above technical solution is that when the oil pressure at the oil outlet of the oil supply pump is too high, the overflow valve can guide part of the hydraulic oil to the oil tank through the return pipe or directly to the oil tank.

[0039] The hydraulic system described in the above technical solution also includes two one-way pressure reducing valves;

[0040] One of the one-way pressure reducing valves is installed on the connecting pipeline between any one of the oil ports of the standard sealing box and the working oil port corresponding to the first reversing valve, and a pressure gauge is provided on the connecting pipeline.

[0041] Another one-way pressure reducing valve is installed on the connecting pipeline between any one of the oil ports of the blowout preventer and the working oil port corresponding to the second directional valve, and a pressure gauge is installed on the connecting pipeline.

[0042] The pressure relief ports of both one-way pressure reducing valves are connected to the return oil pipe.

[0043] The beneficial effects of the above technical solution are as follows: by observing two pressure gauges, it is possible to observe whether the hydraulic pressure in the standard seal and the blowout preventer box has reached the working pressure. At the same time, the two oil ports of the standard seal box and the blowout preventer box can be depressurized in one direction when oil is supplied in the forward or reverse direction.

[0044] The hydraulic system described in the above technical solution also includes a radiator, which is installed on the return oil pipe and used to dissipate heat from the hydraulic oil flowing back to the oil tank.

[0045] The beneficial effect of the above technical solution is that it can cool down the hydraulic oil flowing back into the oil tank, thus preventing the oil temperature in the oil tank from rising.

[0046] A second objective of this invention is to provide a method for testing the sealing performance of a continuous tube blowout preventer assembly using the continuous tube blowout preventer assembly testing system described above.

[0047] To achieve the above objectives, another technical solution of the present invention is as follows: a detection method using the continuous tube blowout preventer assembly detection system as described above, comprising the following steps:

[0048] Step 1: Assemble the adapter, standard sealing box, continuous tubing, and the blowout preventer to be tested to form a continuous tubing blowout preventer assembly;

[0049] Step 2: Inject hydraulic oil into the oil ports of the standard sealing box and the blowout preventer box through the hydraulic system, so that the inner holes of the standard sealing box and the blowout preventer box are in sealed contact with the outer wall of the continuous tube. At this time, the adapter, the standard sealing box, and the blowout preventer box together form a sealed annular cavity outside the continuous tube by surrounding the outer wall of the continuous tube.

[0050] Step 3: Inject test liquid into the sealed annular cavity through the injection port of the adapter and maintain pressure. At the same time, the hydraulic system supplies hydraulic oil to the hydraulic vibration platform to drive the vibration end of the hydraulic vibration platform to vibrate. This causes the continuous tube to drive the adapter, standard sealing box, and blowout preventer on it to vibrate up and down synchronously. If there is no test liquid leakage in the annular cavity within the specified time, it means that the blowout preventer to be tested is qualified.

[0051] The advantages of the above technical solution are: it is easy to test, and it can simulate the reciprocating vibration of the continuous tube blowout preventer assembly to perform sealing tests on the continuous tube blowout preventer assembly. It has good testing effect and is easy to operate. Attached Figure Description

[0052] Figure 1 This is an assembly diagram of the hydraulic vibration platform and continuous tube blowout preventer assembly described in Embodiment 1 of the present invention;

[0053] Figure 2 Here is a simplified structural diagram of an existing continuous tube.

[0054] Figure 3 This is a simplified structural diagram of the continuous tube blowout preventer assembly detection system described in Embodiment 2 of the present invention;

[0055] Figure 4 This is another simplified structural diagram of the continuous tube blowout preventer assembly detection system described in Embodiment 2 of the present invention.

[0056] In the picture:

[0057] 11 Mounting base; 12 Double-headed telescopic cylinder;

[0058] 13 Connecting plate; 21 Pop-out preventer box;

[0059] 22 Standard sealed box; 23 Adapter connector;

[0060] 231 Injection port; 24 Continuous tubing;

[0061] 30 Pressure gauge; 31 Oil tank;

[0062] 32 Oil supply pump; 321 Valve;

[0063] 33. Reversing valve; 34. Return oil pipe;

[0064] 35 Filter; 36 Check valve;

[0065] 37. Relief valve; 38. One-way pressure reducing valve;

[0066] 39 Radiator. Detailed Implementation

[0067] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0068] It should be noted that the above detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0069] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0070] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0071] Furthermore, when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0072] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0073] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., may be used here to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figure. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the figure.

[0074] For example, if a device in the accompanying drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0075] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that, as generally described herein and illustrated in the accompanying drawings, aspects of this disclosure can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly considered herein.

[0076] This disclosure, based on the specific embodiments described in this application, is not intended to be limiting and is intended as an illustration of various aspects. As will be apparent to those skilled in the art, many modifications and variations can be made without departing from the spirit and scope of this disclosure. Functionally equivalent methods and apparatuses, in addition to those listed herein, will be apparent to those skilled in the art from the foregoing description within the scope of this disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. This disclosure will be limited only by the terms of the appended claims and the full scope of equivalents of such claims. It will be understood that this disclosure is not limited to specific methods, reagents, compounds, compositions, or biological systems, which are of course subject to variation. It will also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be restrictive.

[0077] Example 1

[0078] like Figure 1As shown, this embodiment provides a hydraulic vibration platform, including a mounting base 11, a double-headed telescopic cylinder 12, and two connecting plates 13;

[0079] The double-headed telescopic cylinder 12 is vertically arranged, and the two connecting plates 13 are horizontally arranged and spaced apart vertically on the two telescopic ends of the double-headed telescopic cylinder 12.

[0080] The two connecting plates 13 are respectively connected to both ends of the continuous tube blowout box assembly;

[0081] The double-headed telescopic cylinder 12 extends and retracts to drive the continuous tube blowout preventer assembly to move up and down reciprocally.

[0082] The key feature of this design is that the coiled tubing blowout preventer assembly can be vertically positioned and fixed at both ends to two connecting plates. A double-headed telescopic cylinder drives the connecting plates and the coiled tubing blowout preventer assembly to vibrate up and down (when one end of the double-headed telescopic cylinder extends, the other end retracts, and the two ends alternately extend and retract, thus causing the coiled tubing blowout preventer to vibrate up and down). This simulates the scenario of the coiled tubing blowout preventer assembly in the working state at the wellhead, allowing for better testing of the blowout preventer's sealing performance.

[0083] Preferred, such as Figure 2 As shown, one end of the continuous tube is provided with a flange, and the other end is provided with an external thread. At this time, the upper connecting plate is provided with through holes that correspond one-to-one with the through holes on the flange. The flange can be fixed to the upper connecting plate by multiple bolts and nuts. The lower connecting plate is provided with holes that mate with the lower end of the continuous tube. The lower end of the continuous tube can pass through the lower connecting plate from top to bottom. The lower end of the continuous tube is fixed to the lower connecting plate by a nut that matches the external thread of its lower end through a threaded connection.

[0084] The above technical solution provides multiple double-headed telescopic cylinders 12, which are distributed circumferentially and installed on the mounting base 11. The two telescopic ends of each double-headed telescopic cylinder 12 are respectively connected to two connecting plates 13. The multiple double-headed telescopic cylinders 12 extend and retract synchronously to drive the continuous pipe blowout preventer assembly to move up and down reciprocally, thus making the stability of the connecting plate during movement better.

[0085] In the above technical solution, the mounting base 11 is a horizontally arranged annular part, and the continuous tube blowout preventer assembly passes vertically through the inner hole of the mounting base 11. At this time, the installation of multiple double-headed telescopic cylinders is more convenient. More preferably, the mounting base is a horizontally arranged C-shaped structure, and two double-headed telescopic cylinders are preferably provided. The two double-headed telescopic cylinders are installed on the mounting base at intervals, and the opening of the mounting base can facilitate the vertical insertion of the continuous tube blowout preventer assembly into the mounting base.

[0086] The double-headed telescopic cylinder 12 described in the above technical solution is a hydraulic double-headed telescopic cylinder, which has high driving accuracy and high load capacity.

[0087] The continuous pipe blowout preventer assembly testing machine provided in this embodiment may also include a base, which includes a ring seat and multiple support legs. The ring seat is anchored to the ground, and the multiple support legs are vertically arranged on the ring seat at circumferential intervals. The upper ends of the multiple support legs are all connected to the mounting base, thus achieving a stable installation of the mounting base.

[0088] Example 2

[0089] like Figure 3 As shown, this embodiment provides a continuous tube blowout preventer assembly testing system, including a hydraulic system and a hydraulic vibration platform as described above;

[0090] The continuous tube blowout preventer assembly includes a blowout preventer 21 and a standard sealing box 22;

[0091] The blowout preventer 21 has two oil ports and two side oil ports, the standard sealing box 22 has two oil ports, and the double-headed telescopic cylinder 12 has an upper oil port and a lower oil port. The upper and lower oil ports of the double-headed telescopic cylinder 12, the two oil ports of the standard sealing box 22, and the two oil ports and two side oil ports of the blowout preventer 21 are all connected to the hydraulic system. The hydraulic system is used to supply hydraulic oil to the double-headed telescopic cylinder 12, the blowout preventer 21, and the standard sealing box 22. In this way, the hydraulic system drives multiple double-headed telescopic cylinders to extend and retract synchronously. At the same time, the hydraulic system supplies hydraulic pressure to the standard sealing box to seal it. In addition, the hydraulic system injects hydraulic oil into the blowout preventer through the oil ports to seal it. The hydraulic system supplies oil to the side oil ports of the blowout preventer to open or close the side door of the blowout preventer (when the side door of the blowout preventer is open, the rubber core inside the blowout preventer can be replaced). The hydraulic system supplies oil to the double-headed telescopic cylinder to control the extension and retraction of the double-headed telescopic cylinder to drive the continuous tube blowout preventer assembly to vibrate up and down.

[0092] The hydraulic system described in the above technical solution includes an oil tank 31, an oil supply pump 32, and four directional valves 33. The oil inlet of the oil supply pump 32 is connected to the inside of the oil tank 31. Each directional valve 33 has an oil inlet, an oil return port, and two working ports. The four directional valves 33 are designated as a first directional valve, a second directional valve, a third directional valve, and a fourth directional valve. The two working ports of the first directional valve are respectively connected to the two ports of the standard sealing box 22. The two working ports of the second directional valve are respectively connected to the two ports of the blowout preventer box 21. The two working ports of the third directional valve are respectively connected to the... The two side ports of the blowout preventer 21 are connected, the upper ports of the multiple double-headed telescopic cylinders 12 are all connected to one working port of the fourth directional valve, and the lower ports of the multiple double-headed telescopic cylinders 12 are all connected to the other working port of the fourth directional valve. The inlet ports of the four directional valves 33 are all connected to the outlet port of the oil supply pump 32 through the oil supply main pipe, and the return ports of the four directional valves 33 are all connected to one end of the return oil pipe 34. The other end of the return oil pipe 34 is connected to the oil tank 31. In this way, the working status of the blowout preventer, the standard sealing box, and the double-headed telescopic cylinders can be controlled by the four directional valves respectively. Among the four directional valves, except for the directional valve corresponding to the double-headed telescopic cylinder which is a solenoid directional valve, the other three directional valves are manual directional valves.

[0093] The hydraulic system described in the above technical solution also includes two filters 35. One filter 35 is installed at the oil inlet of the oil supply pump 32, and the other filter 35 is installed on the oil return pipe 34. In this way, the hydraulic oil entering the oil supply pump and the hydraulic oil returning to the oil tank through the return pipe can be filtered by the two filters respectively, so as to prevent the residue in the hydraulic oil from entering the blowout preventer, standard sealing box or double-head telescopic cylinder, thereby avoiding equipment wear or damage. Of course, it is also possible to install only one filter at the oil inlet of the oil supply pump.

[0094] The hydraulic system described in the above technical solution also includes a check valve 36, which is used on the oil supply main pipe to prevent hydraulic oil from flowing back to the oil supply pump 32, thereby making the operating oil pressure stability of the hydraulic system better.

[0095] The hydraulic system described in the above technical solution also includes a relief valve 37. The oil inlet of the relief valve 37 is connected to the oil inlet of the four directional valves 33, and the oil outlet of the relief valve 37 is connected to the return oil pipe 34 or the oil tank 31. In this way, when the oil pressure at the oil outlet of the oil supply pump is too high, the relief valve can guide part of the hydraulic oil to the oil tank through the return pipe or directly to the oil tank.

[0096] The hydraulic system described in the above technical solution also includes two one-way pressure reducing valves 38;

[0097] One of the one-way pressure reducing valves 38 is installed on the connecting pipeline between any oil port of the standard sealing box 22 and the working oil port corresponding to the first reversing valve, and a pressure gauge is provided on the connecting pipeline.

[0098] Another one-way pressure reducing valve 38 is provided on the connecting pipeline between any oil port of the blowout preventer 21 and the working oil port corresponding to the second reversing valve, and a pressure gauge is provided on the connecting pipeline.

[0099] Both pressure relief ports of the two one-way pressure reducing valves 38 are connected to the return oil pipe 34. This allows the hydraulic pressure in the standard seal and blowout preventer box to be observed by two pressure gauges to determine whether they have reached the working pressure. At the same time, it allows the two oil ports of the standard seal box and blowout preventer box to be depressurized in one direction when oil is supplied in the forward or reverse direction.

[0100] The hydraulic system described in the above technical solution also includes a radiator 39, which is installed on the return oil pipe 34 and is used to dissipate heat from the hydraulic oil flowing back to the oil tank 31. This can cool down the hydraulic oil flowing back to the oil tank and prevent the oil temperature in the oil tank from rising.

[0101] Of course, such as Figure 4 As shown, the oil outlet of the oil supply pump and the oil inlet of the radiator can also be connected by a bypass pipe, and a valve is installed on the bypass pipe. When the valve 321 is opened, the hydraulic oil supplied by the oil supply pump flows directly back to the oil tank through the return oil pipe. At this time, the hydraulic oil does not pass through any of the directional valves.

[0102] Example 3

[0103] The steps of the testing method for the continuous tube blowout preventer assembly testing system provided in this embodiment are as follows:

[0104] Step 1: Assemble the adapter, standard sealing box, continuous tube and the blowout preventer to be tested to form a continuous tube blowout preventer assembly (the lower end of the blowout preventer is sealed to the upper end of the adapter, the upper end of the standard sealing box is sealed to the lower end of the adapter, and the lower end of the continuous tube passes through and exits the blowout preventer, adapter and standard sealing box in sequence).

[0105] Step 2: Inject hydraulic oil into the ports of the standard sealing box and the blowout preventer through the hydraulic system, so that the inner holes of the standard sealing box and the blowout preventer (the hydraulic pressure in the standard sealing box and the blowout preventer only needs to reach the working pressure) are in sealed contact with the outer wall of the continuous tube. At this time, the adapter, the standard sealing box, the continuous tube and the blowout preventer together form a sealed annular cavity (the annular cavity is located outside the continuous tube).

[0106] Step 3: Inject test liquid into the sealed annular cavity through the injection port of the adapter (at this time, the test liquid in the annular cavity should be continuously pressurized, and the pressure should not be less than 105 MPa). At the same time, the hydraulic system drives the double-head telescopic cylinder to extend and retract, so as to drive the continuous tube blowout preventer assembly to vibrate up and down. If there is no test liquid leakage in the continuous tube blowout preventer assembly within the specified time (which can be 1-3 hours), it means that the blowout preventer to be tested is qualified.

[0107] The test liquid can be injected into the annular cavity through the injection port by a pneumatic pressure testing pump, and the pneumatic pressure testing pump can maintain a constant liquid supply pressure during operation.

[0108] Furthermore, the above embodiments can be used to test the dynamic seal of blowout preventers of different specifications by replacing different specifications of adapters, continuous pipes, and standard sealing boxes.

[0109] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A continuous tube blowout preventer assembly testing system, characterized in that, Includes hydraulic systems and hydraulic vibration platforms; The continuous tube blowout preventer assembly is installed on the vibrating end of the hydraulic vibration platform; The continuous tube blowout preventer assembly includes a blowout preventer (21), a standard sealing box (22), and a continuous tube (24). The continuous tube (24) passes through the blowout preventer (21) and the standard sealing box (22). The blowout preventer (21) and the standard sealing box (22) are connected to the hydraulic system and, under the action of the hydraulic oil provided by the hydraulic system, make sealed contact with the outer wall of the continuous tube (24). The hydraulic system provides hydraulic oil to the hydraulic vibration platform and drives the continuous tube blowout preventer assembly to reciprocate up and down at the vibration end of the hydraulic vibration platform. The hydraulic vibration platform includes a mounting base (11), a double-headed telescopic cylinder (12), and two connecting plates (13). The double-headed telescopic cylinder (12) is vertically arranged and has two telescopic ends that serve as vibration ends. The two connecting plates (13) are horizontally arranged and installed vertically at intervals on the two telescopic ends of the double-headed telescopic cylinder (12). The two connecting plates (13) are respectively connected to the upper and lower ends of the continuous tube (24), and the double-headed telescopic cylinder (12) extends and retracts to drive the continuous tube blowout box assembly to vibrate up and down; The double-headed telescopic cylinder (12) is connected to the hydraulic system.

2. The continuous tube blowout preventer assembly testing system according to claim 1, characterized in that, The double-headed telescopic cylinder (12) is provided in multiple forms; Multiple of the aforementioned double-headed telescopic cylinders (12) are distributed circumferentially at intervals and are mounted on the mounting base (11); The two telescopic ends of each of the double-headed telescopic cylinders (12) are respectively connected to the two connecting plates (13); Multiple double-headed telescopic cylinders (12) extend and retract synchronously to drive the continuous tube blowout preventer assembly to vibrate up and down; the mounting base (11) is a horizontally arranged annular part, and the continuous tube blowout preventer assembly passes vertically through the inner hole of the mounting base (11).

3. The continuous tube blowout preventer assembly testing system according to claim 2, characterized in that, The hydraulic system includes an oil tank (31), an oil supply pump (32), and four directional valves (33). The blowout preventer (21) has two oil ports and two side oil ports, the standard sealing box (22) has two oil ports, the hydraulic vibration platform has an upper oil port and a lower oil port, and the upper and lower oil ports of the hydraulic vibration platform, the two oil ports of the standard sealing box (22), and the two oil ports and two side oil ports of the blowout preventer (21) are all connected to the hydraulic system. The oil inlet of the oil supply pump (32) is connected to the oil tank (31); The reversing valve (33) has an oil inlet, an oil return port and two working oil ports, and the four reversing valves (33) are respectively the first reversing valve, the second reversing valve, the third reversing valve and the fourth reversing valve; The two working ports of the first reversing valve are respectively connected to the two ports of the standard sealing box (22), the two working ports of the second reversing valve are respectively connected to the two ports of the blowout preventer (21), and the two working ports of the third reversing valve are respectively connected to the two side ports of the blowout preventer (21). The upper oil port of the hydraulic vibration platform is connected to one working oil port of the fourth directional valve, and the lower oil port of the hydraulic vibration platform is connected to the other working oil port of the fourth directional valve. The inlet ports of the four reversing valves (33) are all connected to the outlet port of the oil supply pump (32) through the main oil supply pipe. The return ports of the four reversing valves (33) are all connected to one end of the return oil pipe (34). The other end of the return oil pipe (34) is connected to the oil tank (31).

4. The continuous tube blowout preventer assembly detection system according to claim 3, characterized in that, The hydraulic system also includes two filters (35), one of which is located at the inlet of the oil supply pump (32), and the other filter (35) is located on the return pipe (34).

5. The continuous tube blowout preventer assembly detection system according to claim 3, characterized in that, The hydraulic system also includes a check valve (36). The one-way valve (36) is installed on the main oil supply pipe to prevent hydraulic oil from flowing back to the oil supply pump (32).

6. The continuous tube blowout preventer assembly detection system according to claim 3, characterized in that, The hydraulic system also includes a relief valve (37). The oil inlet of the overflow valve (37) is connected to the oil inlets of the four directional valves (33); The outlet of the overflow valve (37) is connected to the return oil pipe (34) or the oil tank (31).

7. The continuous tube blowout preventer assembly detection system according to claim 3, characterized in that, The hydraulic system also includes two one-way pressure reducing valves (38). One of the one-way pressure reducing valves (38) is installed on the connecting pipeline between any oil port of the standard sealing box (22) and the working oil port corresponding to the first reversing valve, and a pressure gauge is provided on the connecting pipeline; Another one-way pressure reducing valve (38) is installed on the connecting pipeline between any one of the oil ports of the blowout preventer (21) and the working oil port corresponding to the second directional valve, and a pressure gauge is provided on the connecting pipeline; The pressure relief ports of both one-way pressure reducing valves (38) are connected to the return oil pipe (34).

8. The continuous tube blowout preventer assembly detection system according to claim 3, characterized in that, The hydraulic system also includes a radiator (39) which is disposed on the return pipe (34) and used to cool the hydraulic oil flowing back to the oil tank (31).

Images