CN214787270U - High-pressure non-releasing pressure well head replacement main control valve device - Google Patents
High-pressure non-releasing pressure well head replacement main control valve device Download PDFInfo
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- CN214787270U CN214787270U CN202120817658.7U CN202120817658U CN214787270U CN 214787270 U CN214787270 U CN 214787270U CN 202120817658 U CN202120817658 U CN 202120817658U CN 214787270 U CN214787270 U CN 214787270U
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Abstract
The utility model discloses a high pressure is not released and is pressed area and is changed well head master control valve device, include the area that is connected with big cross (17) and press the feeding system and press feeding system matched with blocking mechanism, blocking mechanism includes lubricator (1), conveying pole (4), inflation section (18), blanking plug (16) and locking device, lubricator (1) detachable connects at well head valves top, and conveying pole (4) are connected on blanking plug (16) through inflation section (18), and locking device is connected with conveying pole (4), blanking plug (16) and area and presses the feeding system, can utilize the area to press feeding system and blocking mechanism's cooperation, under blocking the fluidic condition in the pit, realizes the area and presses the purpose of changing trouble master control valve.
Description
Technical Field
The utility model relates to a fields such as workover technique, specific theory, high pressure is not released and is pressed and change well head master control valve device.
Background
After the drilling operation of oil (gas) is finished, an oil (gas) extraction tree must be installed on each well, for example, the oil (gas) extraction tree shown in fig. 1 comprises a large four-way 17, one port of the large four-way 17 is connected with a well head oil extraction pipe, the other three ports of the large four-way 17 are connected with a plurality of main control valves, two well head main control valves (well head valve groups) connected to the ports opposite to the well head oil extraction pipes are respectively a No. 4 main control valve 2 and a No. 1 main control valve 3, wherein the No. 1 main control valve 3 is connected with the ports of the large four-way 17 through an upper cover plate flange 6, the upper cover plate flange 6 is connected and fixed to the ports of the large four-way 17 through a mounting screw 15, the set oil (gas) extraction tree can effectively control each well, and the oil (gas) extraction can be controlled according to the requirements of people. In the production process, because the oil (gas) well contains a large amount of liquid and gas with extremely strong corrosivity, the oil (gas) production tree contacts the liquid for a long time and is seriously corroded after the gas, the oil (gas) production tree is damaged and is leaked, the rust is stuck and is difficult to operate, and the like, so that the main control valve of the oil (gas) production tree loses the control effect on the well head, if the well head is out of control, a great malignant accident is inevitably caused, the major damage is brought to life and property safety of people, national economy and ecological environment, and the unacceptable condition is that once the accident potential occurs to the main control valve of the well head, the replacement of the main control valve of the well head must be implemented.
The traditional well head main control valve replacing method is that well killing operation is carried out on a construction well by adopting well killing fluid, and the well head main control valve can be replaced after well killing is stable. The traditional method has the defects of long construction period, environmental pollution, high construction cost and secondary damage to a production layer, and particularly, an old well in the middle and later periods of production is difficult to recover the original yield after killing the well due to low stratum energy and even becomes a waste well.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high pressure is not released and is pressed area and is changed well head master control valve device, can utilize the cooperation of pressing area feeding system and blocking mechanism, under the fluidic circumstances in blocking the pit, realizes pressing the area and changes the purpose of trouble master control valve.
The utility model discloses a following technical scheme realizes: the high-pressure no-release under-pressure replacement wellhead master control valve device comprises an under-pressure feeding system connected with a large four-way joint and a blocking mechanism matched with the under-pressure feeding system, wherein the blocking mechanism comprises a blowout prevention pipe, a conveying rod, an expansion section, a blanking plug and a locking device, the blowout prevention pipe is detachably connected to the top of a wellhead valve group, the conveying rod is connected to the blanking plug through the expansion section, and the locking device is connected with the conveying rod, the blanking plug and the under-pressure feeding system.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the locking device comprises a primary locking device and a secondary locking device, and the primary locking device is respectively connected with the conveying rod and the under-pressure feeding system; in a use state, the secondary locking device is connected with the blanking plug and the upper cover plate flange, or the secondary locking device is connected with the blanking plug and the upper flange of the No. 1 main control valve.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the secondary locking device is clamped on the blanking plug.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the pressurized feeding system comprises hydraulic systems symmetrically arranged on two sides of a wellhead valve group, the upper ends of the hydraulic systems are connected with a primary locking device through an upper locking system, and the lower ends of the hydraulic systems are connected with an upper cover plate flange through a hydraulic cylinder connecting block.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the hydraulic cylinder connecting block is connected to the upper cover plate flange through a mounting screw rod.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the hydraulic system on any side comprises a set of main hydraulic cylinder and at least one set of auxiliary hydraulic cylinder, six sets of hydraulic cylinders are arranged on two sides, the main hydraulic cylinder on any side and two sets of auxiliary hydraulic cylinders (the auxiliary hydraulic cylinder A and the auxiliary hydraulic cylinder B) are arranged on any side, so that the stability of the belt pressure feeding system is enhanced, and preferably, the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are designed based on synchronous working modes.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: go up locking system and include pneumatic cylinder locking piece A and pneumatic cylinder locking piece B, pneumatic cylinder locking piece A and pneumatic cylinder locking piece B pass through pneumatic cylinder locking screw rod erection joint, the cylinder body top of main pneumatic cylinder and auxiliary hydraulic cylinder is connected on pneumatic cylinder locking piece A, the tailpiece of the piston rod of main pneumatic cylinder and auxiliary hydraulic cylinder is connected on pneumatic cylinder locking piece B and one-level locking device, the cylinder body bottom of main pneumatic cylinder and auxiliary hydraulic cylinder is connected on the pneumatic cylinder connecting block.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the hydraulic cylinder locking screw adopts an M39 screw.
Further for realizing better the utility model discloses, adopt the following structure that sets up very much: the expansion section is rubber.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses can utilize the area to press the cooperation of feed-in system and jam mechanism, under the fluidic circumstances in the well of blocking, realize the area and press the purpose of changing trouble main control valve.
The utility model discloses with the integral erection on big cross, when the main control valve that is connected with the upper cover plate flange has a fault or two main control valves of well head oil production pipe's offside all have a fault, adopt the area to press the feed system and send the blanking plug to the upper cover plate flange inner bore department of big cross, then release blanking plug upper portion and prevent the intertube pressure, after this section pressure release, can dismantle the screw rod spare that is connected between 1 number main control valve and the upper cover plate flange, then lift 1 number main control valve and 4 number main control valves, make and form the space between 1 number main control valve and the upper cover plate flange, then press the secondary locking device package and press from both sides on the blanking plug, and further utilize the screw hole that screw rod spare and upper cover plate flange are connected with 1 number main control valve, lock secondary locking device at the upper cover plate flange pipe, thereby realize in the well under the area condition, can be with trouble valve (1 number main control valve) under the pressure condition, can be with the main control valve (1 number main control valve) on the blanking plug, Two valves of the No. 4 main control valve or a simple No. 1 main control valve) are replaced.
The utility model discloses when using, when only leaking in 4 number main control valves have trouble, 1 number main control valves, also can only utilize the blanking plug to block up the upper portion of 1 number main control valves, then utilize second grade locking device to press from both sides the blanking plug and lock second grade locking device on the ring flange of the top port of 1 number main control valves through screw member to need all take off 1 number main control valves and 4 number main control valves.
Drawings
Fig. 1 is a schematic diagram of a production (gas) tree.
Fig. 2 is a schematic perspective view of the present invention (i.e. the unplugged state (i.e. the initial state)) of the blanking plug.
Fig. 3 is a schematic view of the structure of the present invention (i.e. the unplugged state (i.e. the initial state)) when viewed from the front.
Fig. 4 is a schematic perspective view of the present invention (blocking state of the plug).
Fig. 5 is a schematic view of the structure of the present invention (the plugging state of the plug).
Fig. 6 is a half sectional view showing a clogged state of the stopper.
The anti-blowout device comprises a blowout prevention pipe 1, a main control valve 2-4, a main control valve 3-1, a conveying rod 4, a secondary locking device 5, an upper cover plate flange 6, a hydraulic cylinder locking block B7, a primary locking device 8, a hydraulic cylinder locking block A9, a hydraulic cylinder locking screw 10, an auxiliary hydraulic cylinder A11, an auxiliary hydraulic cylinder B12, a main hydraulic cylinder 13, a hydraulic cylinder connecting block 14, a hydraulic cylinder mounting screw 15, a blanking plug 16, a large four-way valve 17 and an expansion section 18.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
The noun explains:
the high-pressure oil-gas well is a well which predicts that the well opening shut-in pressure can reach or exceed 35MPa when the stratum pressure provided by geological design is used as the basis and the stratum fluid is filled in the well shaft, the high-pressure no-releasing under-pressure well opening replacement main control valve device is mainly applied to replacement of a well opening main control valve on an oil (gas) production tree of the well, and the high-pressure finger pressure value in the high-pressure no-releasing is not less than 35 MPa; in the whole process of changing the valve under pressure without releasing the finger, the plugging tool (the plugging device) is always safely locked on the wellhead and is in a full-process controlled state.
Example 1:
the utility model provides a high pressure is not released and is pressed area and is changed well head master control valve device can utilize the cooperation of pressing area feeding system and blocking mechanism, under the fluidic circumstances in blocking the pit, realizes pressing the mesh of changing trouble master control valve in area, as shown in fig. 2-6, adopt the following structure that sets up very much: the anti-blowout device comprises an under-pressure feeding system connected with a large four-way joint 17 and a blocking mechanism matched with the under-pressure feeding system, wherein the blocking mechanism comprises an anti-blowout pipe 1, a conveying rod 4, an expansion section 18, a blanking plug 16 and a locking device, the anti-blowout pipe 1 is detachably connected to the top of a wellhead valve group, the conveying rod 4 is connected to the blanking plug 16 through the expansion section 18, and the locking device is connected with the conveying rod 4, the blanking plug 16 and the under-pressure feeding system.
As a preferable arrangement scheme, the wellhead valve group replacing device with pressure is provided with a pressure feeding system and a blocking mechanism matched with the pressure feeding system, wherein the pressure feeding system is connected with a large four-way 17, the blocking mechanism is provided with a blowout prevention pipe 1, a conveying rod 4, an expansion section 18, a blocking device 16 and a locking device, the blowout prevention pipe 1 is detachably connected to the top of the wellhead valve group, namely the blowout prevention pipe 1 is connected to the top of a No. 4 main control valve 2, the conveying rod 4 is connected with the blocking device 16 through the expansion section 18, and the locking device is connected with the conveying rod 4, the blocking device 16 and the pressure feeding system.
When the blowout preventer is used, the blowout preventer 1 is connected to the top of the No. 4 main control valve 2, the conveying rod 4, the expansion section 18 and the blanking plug 16 enter a wellhead valve group consisting of the No. 4 main control valve 2 and the No. 1 main control valve 3 from the blowout preventer 1, the blowout preventer 1 and the conveying rod 4 are in a sealed state, the pressurized feeding system is used for pushing the expansion section 18 and the blanking plug 16 to a required position (an upper flange plate position or an upper cover plate flange position of the No. 1 main control valve 3) in a hydraulic mode by using the conveying rod 4 under a pressurized state, at the moment, under the action of the pressure in a well, the blanking plug 16 blocks the lower fluid of the blanking plug 16, then the upper pressure of the blanking plug 16 is released through the blowout preventer 1, after the pressure is released, the main control valve which is not connected with the blanking plug 16 in the wellhead valve group can be disassembled, after the disassembly, the locking device connected with the blanking plug 16 is used for transferring the pressure in the oil production pipe to the No. 1 main control valve 3 or the upper cover plate flange 6, can change 1 number main control valve 3 or/and 4 number main control valve 2 this moment, because the cooperation of blanking plug 16 and locking device can effectual guarantee when carrying out the change of main control valve, blanking plug 16's sealing performance is absolutely reliable.
Example 2:
this embodiment is further optimized on the basis of above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2~ 6, further for better realizing the utility model discloses, adopt the following structure that sets up very much: the locking device comprises a primary locking device 8 and a secondary locking device 5, wherein the primary locking device 8 is respectively connected with the conveying rod 4 and the pressurized feeding system; in a use state, the secondary locking device 5 is connected with the blanking plug 16 and the upper cover plate flange 6, or the secondary locking device 5 is connected with the blanking plug 16 and the upper flange of the No. 1 main control valve 3.
Preferably, the locking device is provided with two stages, namely a primary locking device 8 and a secondary locking device 5, wherein the conveying rod 4 is connected to the pressurized feeding system through the primary locking device 8, and the blanking plug 16 is connected to the upper cover plate flange 6 or the upper flange of the No. 1 main control valve 3 through the secondary locking device 5 in the use state.
When the device is used, when two main control valves, namely the main control valve No. 1 and the main control valve No. 4 and the main control valve No. 2, need to be replaced, the conveying rod 4 is pushed by a pressurized feeding system through the primary locking device 8, the conveying rod 4 further pushes the expansion section 18 and the blanking plug 16, the blanking plug 16 is pushed to the upper cover plate flange 6, the secondary locking device 5 is locked on the blanking plug 16, and then the secondary locking device 5 can be fixed on the upper cover plate flange 6 by using an additional screw connecting piece or a screw connecting piece connecting the original main control valve No. 1 and the upper cover plate flange; when only the No. 4 main control valve 2 needs to be replaced, the blanking plug 16 is pushed into the No. 1 main control valve 3, the secondary locking device 5 is locked on the blanking plug 16, then the secondary locking device 5 can be fixed on the upper flange of the No. 1 main control valve 3 by using an additional screw rod connecting piece or a screw rod connecting piece connected with the No. 1 main control valve 3 and the No. 4 main control valve 2, when the secondary locking device 5 is fixed on the upper flange of the upper cover plate flange 6 or the upper flange of the No. 1 main control valve 3, the corresponding fault valve can be replaced, when the secondary locking device 5 is used for switching the pressure in the well to a component connected with the secondary locking device, at the moment, the primary locking device 8 can be disassembled, then the main control valve on the upper part of the secondary locking device 5 and a pipe are hoisted by using a hoisting tool along the conveying rod 4 for blowout prevention, then a new main control valve is installed on the conveying rod 4, at the moment, install one-level locking device 8 in place, then pressurize, and with the power that receives on the blanking plug 16 pass through transfer rod 4 and be transferred to one-level locking device 8 on, at this moment, can dismantle second grade locking device, and then install 1 number main control valve 3 back in place, deblocking blanking plug 16, with blanking plug 16 up move back to 1 number main control valve 3 valve plate top, close 1 number main control valve 3, pressure is let out through the pressure relief device on lubricator 1, can remove this area pressure change well head valves device, then can be with upper cover plate flange 6 and the full erection joint of big cross 17, and further install 4 number main control valve 2 in place. After the number 1 main control valve 3 and the number 4 main control valve 2 are installed in place, the blanking plug 16 can be unsealed, and the timing of unsealing the blanking plug 16 can be determined according to the field situation, but is not limited to this.
Example 3:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: the secondary locking device 5 is clamped onto the obturator 16.
Preferably, the secondary locking device 5 is a hoop structure, and a section of annular concave structure is arranged on the blanking plug 16, so that the secondary locking device 5 is clamped on the annular concave structure.
Example 4:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: the pressurized feeding system comprises hydraulic systems symmetrically arranged on two sides of a wellhead valve group, the upper ends of the hydraulic systems are connected with a primary locking device 8 through an upper locking system, and the lower ends of the hydraulic systems are connected with an upper cover plate flange 6 through a hydraulic cylinder connecting block 14.
As a preferable arrangement scheme, when the pressurized feeding system is designed, the pressurized feeding system comprises two sets of hydraulic systems, the two sets of hydraulic systems are symmetrically arranged on two sides of a wellhead valve group, a valve upper rotating disc connecting line of the wellhead valve group is taken as a symmetry axis (namely, any set of hydraulic system is not arranged on the side of the valve upper rotating disc), the upper end of the hydraulic system is connected with a primary locking device 8 through an upper locking system, and the lower end of the hydraulic system is connected with an upper cover plate flange 6 through a hydraulic cylinder connecting block 14.
Example 5:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: the hydraulic cylinder connecting block 14 is connected to the upper cover plate flange 6 through a mounting screw 15.
As a preferred arrangement scheme, the installation arrangement of the wellhead valve group device is effectively replaced by utilizing the matched installation holes of the upper cover plate flange 6 and the large four-way 17, when the wellhead valve group device is designed and used, the hydraulic cylinder connecting block 14 is installed and arranged on the upper cover plate flange 6 through the installation screw 15, when the fault valve needs to be replaced, when the pressurized feeding system is installed, the installation screw 15 connected with the upper cover plate flange 6 and the large four-way 17 is firstly withdrawn for at least 4 (the two sides are respectively withdrawn for at least 2, the original installation screw 15 is replaced by the new screw one by one), the hydraulic cylinder connecting block 14 is preferably withdrawn for 6 (the two sides are respectively withdrawn for 3), then the hydraulic cylinder connecting block 14 is arranged on the upper cover plate flange 6, and the hydraulic cylinder connecting block 14 and the upper cover plate flange 6 are fixed together by utilizing the installation holes of the original installation screw 15 on the upper cover plate flange 6 and the reserved connecting holes on the hydraulic cylinder connecting block 14, and then, the hydraulic system can be installed, but the hydraulic system and the hydraulic cylinder connecting block 14 can be installed and fixed firstly and then integrally installed and fixed on the upper cover plate flange 6, and how to install the hydraulic system can be adjusted correspondingly according to the situation.
Example 6:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: the hydraulic system comprises a set of main hydraulic cylinders 13 and at least one set of auxiliary hydraulic cylinders on either side.
As a preferable arrangement scheme, the hydraulic system on any side comprises a set of main hydraulic cylinder 13 and at least one set of auxiliary hydraulic cylinder, the preferable auxiliary hydraulic cylinder is provided with two sets, namely an auxiliary hydraulic cylinder a11 and an auxiliary hydraulic cylinder B12, the auxiliary hydraulic cylinder a11 and the auxiliary hydraulic cylinder B12 are respectively arranged on two sides of the main hydraulic cylinder 13, and preferably, the main hydraulic cylinder 13, the auxiliary hydraulic cylinder a11 and the auxiliary hydraulic cylinder B12 are designed based on a synchronous working mode, so that a more stable pressure can be delivered to the transmission rod 4, and the strength, safety, reliability and stability of the whole set of wellhead valve group replacing device with pressure are enhanced.
Example 7:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: go up locking system and include hydraulic cylinder locking piece A9 and hydraulic cylinder locking piece B7, hydraulic cylinder locking piece A9 and hydraulic cylinder locking piece B7 pass through hydraulic cylinder locking screw 10 erection joint, the cylinder body top of main hydraulic cylinder 13 and auxiliary hydraulic cylinder is connected on hydraulic cylinder locking piece A9, the piston rod end of main hydraulic cylinder 13 and auxiliary hydraulic cylinder is connected on hydraulic cylinder locking piece B7 and one-level locking device 8, the cylinder body bottom of main hydraulic cylinder 13 and auxiliary hydraulic cylinder is connected on hydraulic cylinder connecting block 14.
As a preferable arrangement scheme, the upper locking system comprises two parts, namely a hydraulic cylinder locking block A9 and a hydraulic cylinder locking block B7 which are arranged up and down, the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are connected and installed through a hydraulic cylinder locking screw 10 (the locking screw 10 can also play a role of a positioning guide rail when the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder work), a primary locking device 8 is arranged between the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7, when the upper locking system is arranged, two sets of upper locking systems are respectively arranged at two sides, any one set of upper locking system is fixedly installed through two sets of hydraulic cylinder locking screws 10, when the auxiliary hydraulic cylinder of the main hydraulic cylinder 13 is installed, the bottom ends of the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder are arranged on the hydraulic cylinder connecting block 14 in a thread fit mode, an interference fit mode, a clamping mode or a thread auxiliary piece fit mode, the top ends of the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder are arranged on the hydraulic cylinder locking block A9 in a threaded fit or interference fit or clamping or threaded auxiliary part fit mode, the piston rod of the auxiliary hydraulic cylinder is further fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary part fit mode, the piston rod end of the main hydraulic cylinder 13 penetrates through the primary locking device 8 and is fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary part fit mode, when the piston rod of the main hydraulic cylinder 13 is connected with the primary locking device 8 in a penetrating mode, the locking device can be connected and fixed on the primary locking device 8 in a threaded fit mode (under the condition of the fit mode, threaded auxiliary pieces (namely nuts) can be arranged on the upper portion and the lower portion of the primary locking device 8 to further lock the primary locking device 8 and the piston rod), and the locking device can also be connected and fixed on the primary locking device 8 in an interference fit and up-down threaded auxiliary piece fastening mode.
When the hydraulic cylinder is applied, at an initial position, piston rods of two hydraulic cylinders are in a remote state, then when the piston rods of the hydraulic cylinders begin to retract into the cylinder body, the primary locking device 8 drives the conveying rod 4 to push the expansion section 18 and the blanking plug 16 to move towards the large four-way 17 side, so as to provide larger or/and more stable force for the conveying rod 4, the auxiliary hydraulic cylinder transfers the pressure to the primary locking device 8 through the hydraulic cylinder locking block B7, when the conveying rod 4 is conveyed, the hydraulic cylinder locking screw 10 connecting the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 plays a role of positioning a guide rail, namely, under the positioning action of the hydraulic cylinder locking screw 10, the primary locking device 8 drives the conveying rod 4 to move downwards or upwards along the hydraulic cylinder locking screw 10, so that the conveying rod 4 can accurately drive the expansion section 18 and the blanking plug 16 to be blocked to a preset position, after the plugging is finished, the working state of each hydraulic cylinder is maintained, the pressure in the wellhead oil extraction pipe is transferred to the primary locking device 8, the primary locking device 8 is transferred to the large four-way joint 17 through the hydraulic system, at the moment, the pressure between the expansion section 18 and the lubricator 1 is released through the lubricator 1, the main control valve above the plug 16 can be safely removed, the plug 16 is further fixed on the main control valve or the upper cover plate flange 6 below the expansion section 18 through the secondary locking device 5, at the moment, the pressure in the well is transferred to the main control valve or the upper cover plate flange 6 connected with the secondary locking device 5 through the plug 16 and the secondary locking device 5, the upper locking system and primary locking device 8 can then be removed (or the hydraulic cylinder and primary locking device 8 removed, but not limited to) and the main control valve and lubricator 1 above the plug 16 can be hung up along the transfer rod 4 for replacement.
When the wellhead valve group (a new No. 1 main control valve 3 and a new No. 4 main control valve 2 (the valve is provided with the blowout prevention pipe 1 in advance) or the new No. 1 main control valve 3 and the new No. 4 main control valve 2 (the valve is provided with the blowout prevention pipe 1 in advance)), the primary locking device 8 is arranged in place, each hydraulic cylinder is synchronously pressurized firstly, so that the pressure in the well is transferred to the upper cover plate flange 6 again through the conveying rod 4 and the primary locking device 8, the secondary locking device 5 can be disassembled, after the secondary locking device 5 is disassembled, the main control valve above the blanking plug 16 can be arranged on the main control valve connected with the blanking plug 16 or the upper cover plate flange 6, after the assembly is completed, the blanking plug 16 can be retreated to the upper end of the valve plate of the new No. 1 main control valve 3, the pressure is released through the blowout prevention pipe 1 pressure relief device, and the wellhead valve group replacing device under pressure is disassembled, the oil (gas) recovery number is recovered.
Example 8:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: the hydraulic cylinder locking screw 10 adopts an M39 screw.
Example 9:
this embodiment is further optimized on the basis of any above-mentioned embodiment, and the parts the same with aforementioned technical scheme will not be repeated herein, as shown in fig. 2-6, further for better realizing the utility model discloses, adopt the following structure that sets up in particular: the swelling section 18 is rubber and when the transfer rod 4 runs down, the swelling section 18 made of rubber will swell and block the upper part and periphery of the packer 16, so that well fluid does not leak out of the wellhead.
Example 10:
the embodiment is further optimized on the basis of any one of the above embodiments, and the high-pressure no-release pressurized replacement wellhead master control valve device comprises a pressurized feeding system, a blocking mechanism, a locking device and 4 large components of the locking system, as shown in fig. 2 to fig. 6, wherein the pressurized feeding system adopts a hydraulic system powered by hydraulic pressure, 3 sets of hydraulic systems are preferably and symmetrically arranged during design, the 3 sets of hydraulic systems are respectively a main hydraulic cylinder 13, an auxiliary hydraulic cylinder a11 and an auxiliary hydraulic cylinder B12, the auxiliary hydraulic cylinder a11 and the auxiliary hydraulic cylinder B12 are respectively arranged at two sides of the main hydraulic cylinder 13, and preferably, the main hydraulic cylinder 13, the auxiliary hydraulic cylinder a11 and the auxiliary hydraulic cylinder B12 are designed based on a synchronous working mode, so that a larger, more stable and uniform force can be transmitted to the transmission rod 4;
the plugging mechanism is provided with a lubricator 1, a transmission rod 4, an expansion section 18 and a plug 16;
the locking device comprises a primary locking device 8 and a secondary locking device 5;
the locking system comprises a hydraulic cylinder locking block A9, a hydraulic cylinder locking block B7 and a hydraulic cylinder connecting block 14;
an annular groove is formed in the connecting part of the transmission rod 4 and the primary locking device 8, so that the primary locking device 8 can be better embraced on the transmission rod 4, and the transmission rod 4 and the primary locking device 8 can be connected together in a thread matching mode or a thread auxiliary part matching mode; an annular groove is arranged at the connecting part of the blanking plug 16 and the secondary locking device 5, so that the secondary locking device 5 is tightly held on the blanking plug 16, when in use, the blowout preventer 1 is detachably connected at the top of the No. 4 main control valve 2, the conveying rod 4 is connected with the blanking plug 16 through the expansion section 18, the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are in installation connection through a hydraulic cylinder locking screw 10 (the locking screw 10 can also play the roles of positioning and guiding and stabilizing the whole device when the main hydraulic cylinder 13 and the auxiliary hydraulic cylinder work, thereby increasing the safety and reliability of the whole device), the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7 are in up-down relation, the primary locking device 8 is arranged between the hydraulic cylinder locking block A9 and the hydraulic cylinder locking block B7, the primary locking device 8 is connected with the conveying rod 4, when the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are installed, the bottom ends of the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are fixedly installed on the hydraulic cylinder connecting block 14 in a threaded fit or interference fit or clamping or threaded auxiliary part fit mode, the top ends of the main hydraulic cylinder 13, the auxiliary hydraulic cylinder A11 and the auxiliary hydraulic cylinder B12 are arranged on the hydraulic cylinder locking block A9 in a threaded fit or interference fit or clamping or threaded auxiliary part fit mode, the piston rod of the auxiliary hydraulic cylinder is further fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary part fit mode, the piston rod end of the main hydraulic cylinder 13 penetrates through the primary locking device 8 and is fixed on the hydraulic cylinder locking block B7 in a threaded fit or threaded auxiliary part fit mode, and when the piston rod of the main hydraulic cylinder 13 is connected with the primary locking device 8 in a penetrating mode, the piston rod can be fixedly connected on the primary locking device 8 in a threaded fit mode (in the case of the fit mode, the upper and lower sides of the primary locking device 8 can also be provided with threads The thread auxiliary part (namely, a nut) is used for further locking the primary locking device 8 and the piston rod), and can also be connected and fixed on the primary locking device 8 in a mode of interference fit and fastening of the upper and lower thread auxiliary parts.
When the replacement of trouble valve needs to be carried out, plug 16 intervenes the well head valves from the top of lubricator 1, when carrying out the connection and the fixation of upper cover plate flange 6 and hydraulic cylinder connecting block 14: the mounting screw rods 15 connecting the upper cover plate flange 6 and the large cross 17 are withdrawn from at least 4 (two sides are withdrawn from at least 2), preferably 6 (two sides are 3), the hydraulic cylinder connecting block 14 is arranged on the upper cover plate flange 6, the mounting holes of the original mounting screw rods 15 on the upper cover plate flange 6 and the reserved connecting holes on the hydraulic cylinder connecting block 14 are utilized to fix the hydraulic cylinder connecting block 14 and the upper cover plate flange 6 together, then the hydraulic system can be mounted, but the hydraulic system and the hydraulic cylinder connecting block 14 can be mounted and fixed firstly and then integrally mounted and fixed on the upper cover plate flange 6, and the specific mounting method can be correspondingly adjusted according to the situation.
In application, at an initial position, the auxiliary hydraulic cylinder a11, the auxiliary hydraulic cylinder B12 and the piston rod of the main hydraulic cylinder 13 are all in a remote state, and then when the piston rods of the auxiliary hydraulic cylinder a11, the auxiliary hydraulic cylinder B12 and the main hydraulic cylinder 13 begin to contract into the cylinder, under the action of pressure, the primary locking device 8 drives the transmission rod 4 to push the expansion section 18 and the blanking plug 16 to move towards the large four-way 17 side, wherein the auxiliary hydraulic cylinder a11 and the auxiliary hydraulic cylinder B12 transmit the pressure to the primary locking device 8 through the hydraulic cylinder locking block B7, so as to cooperate with the main hydraulic cylinder 13 to provide a larger or/and more stable force to the transmission rod 4, and when the transmission rod 4 is transported, the hydraulic cylinder locking screw 10 connecting the hydraulic cylinder locking block a9 and the hydraulic cylinder locking block B7 can play a role of a positioning guide rail, that is under the positioning action of the hydraulic cylinder locking screw 10, the primary locking device 8 drives the conveying rod 4 to move downwards or upwards along the hydraulic cylinder locking screw rod 10, so that the conveying rod 4 can be ensured to accurately drive the expansion section 18 and the blanking plug 16 to be blocked to a preset position (at the upper cover plate flange 6 or at the upper end of the No. 1 main control valve 3), after the blockage is good, the working state of each hydraulic cylinder is maintained, the pressure in the wellhead oil extraction pipe is transferred to the primary locking device 8, the primary locking device 8 is transferred to the large four-way joint 17 through a hydraulic system, at the moment, the pressure between the expansion section 18 and the blowout prevention pipe 1 is released through the blowout prevention pipe 1, the main control valve above the blanking plug 16 can be safely removed, the blanking plug 16 is further fixed on the main control valve below the expansion section 18 or the upper cover plate flange 6 through the secondary locking device 5, at the moment, the pressure in the well is transferred to the main control valve or the upper cover plate flange 6 connected with the secondary locking device 5 through the blanking plug 16 and the secondary locking device 5, the cylinder lock B7, cylinder lock a9 and primary lock 8 (or the auxiliary cylinder a11, cane gripper B12, master cylinder 13 and primary lock 8, but not limited thereto) are then removed and the main control valve and lubricator 1 above the plug 16 is lifted out along the transfer rod 4 for replacement.
When the wellhead valve group (a new No. 1 main control valve 3 and a new No. 4 main control valve 2 (the valve is provided with the blowout prevention pipe 1 in advance) or the new No. 1 main control valve 3 and the new No. 4 main control valve 2 (the valve is provided with the blowout prevention pipe 1 in advance)), the primary locking device 8 is reinstalled, then each hydraulic cylinder is pressurized, the pressure in the well is transferred to the upper cover plate flange 6 again through the conveying rod 4 and the primary locking device 8, the secondary locking device 5 can be disassembled, after the secondary locking device 5 is disassembled, the main control valve above the blanking plug 16 can be installed on the main control valve connected with the blanking plug 16 or the upper cover plate flange 6, the blanking plug 16 is disassembled, the blanking plug 16 is retreated upwards to the position above the valve plate of the No. 1 main control valve 3, the No. 1 main control valve 3 is closed, the pressure is relieved through the pressure relief device on the blowout prevention pipe 1, and the wellhead valve group replacing device can be disassembled, and then the flange 6 of the upper cover plate and the large four-way valve 17 can be completely installed and connected, and the No. 4 main control valve 2 is further installed in place, so that the oil (gas) extraction number is restored to the original state. After the number 1 main control valve 3 and the number 4 main control valve 2 are installed in place, the blanking plug 16 can be unsealed, and the timing of unsealing the blanking plug 16 can be determined according to the field situation, but is not limited to this.
Therefore, the fault valve can be safely replaced under pressure in the well under the condition of pressure in the well.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (9)
1. High pressure does not give up and presses and change well head master control valve device, its characterized in that: the anti-blowout device comprises an under-pressure feeding system connected with a large four-way joint (17) and a blocking mechanism matched with the under-pressure feeding system, wherein the blocking mechanism comprises a blowout prevention pipe (1), a conveying rod (4), an expansion section (18), a blanking plug (16) and a locking device, the blowout prevention pipe (1) is detachably connected to the top of a wellhead valve group, the conveying rod (4) is connected to the blanking plug (16) through the expansion section (18), and the locking device is connected with the conveying rod (4), the blanking plug (16) and the under-pressure feeding system.
2. The high-pressure no-release pressure well head replacement main control valve device according to claim 1, characterized in that: the locking device comprises a primary locking device (8) and a secondary locking device (5), wherein the primary locking device (8) is respectively connected with the conveying rod (4) and the under-pressure feeding system; in a use state, the secondary locking device (5) is connected with the blanking plug (16) and the upper cover plate flange (6), or the secondary locking device (5) is connected with the blanking plug (16) and an upper flange of the No. 1 main control valve (3).
3. The high-pressure no-release pressure well head replacement main control valve device according to claim 2, characterized in that: the secondary locking device (5) is clamped on the plug (16).
4. The high-pressure no-release pressure well head replacement main control valve device according to claim 2 or 3, characterized in that: the pressurized feeding system comprises hydraulic systems symmetrically arranged on two sides of a wellhead valve group, the upper ends of the hydraulic systems are connected with a primary locking device (8) through an upper locking system, and the lower ends of the hydraulic systems are connected with an upper cover plate flange (6) through a hydraulic cylinder connecting block (14).
5. The high-pressure no-release pressure well head replacement main control valve device according to claim 4, characterized in that: and the hydraulic cylinder connecting block (14) is connected to the upper cover plate flange (6) through a mounting screw (15).
6. The high-pressure no-release pressure well head replacement main control valve device according to claim 4, characterized in that: the hydraulic system comprises a set of main hydraulic cylinders (13) and at least one set of auxiliary hydraulic cylinders on either side.
7. The high-pressure no-release pressure well head replacement main control valve device according to claim 6, characterized in that: go up locking system and include pneumatic cylinder locking piece A (9) and pneumatic cylinder locking piece B (7), pneumatic cylinder locking piece A (9) and pneumatic cylinder locking piece B (7) are through pneumatic cylinder locking screw (10) erection joint, the cylinder body top of main hydraulic cylinder (13) and auxiliary hydraulic cylinder is connected on pneumatic cylinder locking piece A (9), the piston rod end of main hydraulic cylinder (13) and auxiliary hydraulic cylinder is connected on pneumatic cylinder locking piece B (7) and one-level locking device (8), the cylinder body bottom of main hydraulic cylinder (13) and auxiliary hydraulic cylinder is connected on pneumatic cylinder connecting block (14).
8. The high-pressure no-release pressure-replacement wellhead master control valve device according to claim 7, characterized in that: the hydraulic cylinder locking screw (10) adopts an M39 screw.
9. The high-pressure no-release pressure well head replacement main control valve device according to any one of claims 1 to 3 and 5 to 8, characterized in that: the expansion section (18) is rubber.
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|---|---|---|---|
| CN202120817658.7U CN214787270U (en) | 2021-04-21 | 2021-04-21 | High-pressure non-releasing pressure well head replacement main control valve device |
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| CN202120817658.7U CN214787270U (en) | 2021-04-21 | 2021-04-21 | High-pressure non-releasing pressure well head replacement main control valve device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202432A (en) * | 2021-04-21 | 2021-08-03 | 梅宗禄 | High-pressure non-releasing pressure well head replacement main control valve device |
| WO2023229910A1 (en) * | 2022-05-24 | 2023-11-30 | Baker Hughes Oilfield Operations Llc | System and method for a secondary pressure boundary tool |
-
2021
- 2021-04-21 CN CN202120817658.7U patent/CN214787270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202432A (en) * | 2021-04-21 | 2021-08-03 | 梅宗禄 | High-pressure non-releasing pressure well head replacement main control valve device |
| WO2023229910A1 (en) * | 2022-05-24 | 2023-11-30 | Baker Hughes Oilfield Operations Llc | System and method for a secondary pressure boundary tool |
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