CN212105820U - Automatic locking device of coiled tubing blowout preventer - Google Patents
Automatic locking device of coiled tubing blowout preventer Download PDFInfo
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- CN212105820U CN212105820U CN202020663324.4U CN202020663324U CN212105820U CN 212105820 U CN212105820 U CN 212105820U CN 202020663324 U CN202020663324 U CN 202020663324U CN 212105820 U CN212105820 U CN 212105820U
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Abstract
The utility model discloses an automatic locking device of coiled tubing preventer, including main piston rod, main piston, master cylinder, auto-lock hydro-cylinder, locking slider, first supplementary hydro-cylinder device, second supplementary hydro-cylinder device, first check valve and second check valve. Has the advantages that: the opening/closing of the flashboard and the unlocking/locking of the automatic locking device perform time-sharing actions, so that the abrasion of a main piston rod and a locking sliding block is reduced, and the service life of the device is prolonged; the automatic locking device can be separated from the blowout preventer shell through the hydraulic oil path, and the maintenance is convenient; by arranging the indicating rod, the opening and closing state of the flashboard can be judged directly according to the position of the indicating rod, and the observation is convenient; the two ends of the locking sliding block are provided with sealing elements, the inclined end surface of the main piston rod and the wedge surface of the locking sliding block are not contacted with hydraulic oil, the friction coefficient required by self-locking is increased, and meanwhile friction debris cannot pollute the hydraulic oil; the main piston rod is detachably mounted in a split mode, and the whole main piston rod does not need to be replaced when being seriously abraded, so that the use cost is reduced.
Description
Technical Field
The utility model relates to a coiled tubing preventer technical field, concretely relates to automatic locking device of coiled tubing preventer.
Background
The blowout preventer is one of the necessary equipment in the present oil, gas well coiled tubing production operation, and it mainly utilizes internally mounted flashboards to close the well in time when the kick, blowout or other abnormal conditions occur, avoids the occurrence of bigger accident, produces bigger danger. Blowout preventers are important well control devices for coiled tubing operations, and are generally provided with full-seal rams, shear rams, slip rams and semi-seal rams, and when the rams are closed, the other rams need to continuously push the rams to keep a compaction state except that the shear rams shear the coiled tubing for one-time action. When the coiled tubing needs to be closed for a long time, the hydraulic device is required to continuously push the flashboard to keep a compaction state, the energy consumption is high, the requirement on the hydraulic device is high, and once the hydraulic device is damaged, well closing failure is caused. The traditional blowout preventer is usually provided with a screw rod to realize manual locking of the flashboard, the labor intensity is high, the automation level of equipment is low, and when hydrogen sulfide gas is contained in a well, manual locking close to the well mouth by workers is very dangerous. Although some automatic locking devices of blowout preventers appear in the market at present, the labor intensity of workers is reduced, and the operation safety of the workers is guaranteed, the brake closing and locking operations of the flashboards are carried out simultaneously, the device is seriously abraded and inconvenient to maintain, the locking blocks are usually soaked in hydraulic oil, the friction coefficient required by the self-locking operation is reduced, meanwhile, fragments generated by abrasion can pollute the hydraulic oil, and the service life of the automatic locking devices is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art, and providing an automatic locking device of a coiled tubing blowout preventer, which realizes the opening/closing of a flashboard and the unlocking/locking time-sharing action of the automatic locking device by arranging a first auxiliary oil cylinder device, a second auxiliary oil cylinder device, a first one-way valve and a second one-way valve, reduces the abrasion of a main piston rod and a locking slide block, and prolongs the service life of the device; meanwhile, one oil path is used for solving the problems of closing, locking, unlocking and opening of the flashboard, the operation is convenient, the automatic locking device can be separated from the shell of the blowout preventer through the hydraulic oil path, and the maintenance is convenient; by arranging the indicating rod, the opening and closing state of the flashboard can be judged directly according to the position of the indicating rod, and the observation is convenient; the two ends of the locking sliding block are respectively provided with a sealing element, the inclined end surface of the main piston rod and the wedge surface of the locking sliding block are not contacted with hydraulic oil, so that the friction coefficient required by self-locking is increased, the locking effect is improved, meanwhile, friction debris cannot pollute the hydraulic oil, and the service life of the hydraulic oil is prolonged; the main piston rod is detachably mounted in a split mode, and the whole main piston rod does not need to be replaced when being seriously abraded, so that the use cost is reduced.
The purpose of the utility model is achieved through the following technical measures: the utility model provides an automatic locking device of coiled tubing preventer, includes main piston rod, master piston, master cylinder, auto-lock hydro-cylinder, locking slider, first auxiliary cylinder device, second auxiliary cylinder device, first check valve and second check valve, the one end of master piston rod is connected with the flashboard of preventer, the other end of master piston rod runs through the master cylinder and extends to in the auto-lock hydro-cylinder, the master piston is located the master cylinder and with master piston rod fixed connection, the locking slider is located the auto-lock hydro-cylinder and uses with the master piston rod cooperation, first auxiliary cylinder device provides hydraulic oil for the master cylinder, and then promotes the master piston to the direction removal near the preventer, and the direction removal that is close to the preventer through the master piston triggers first check valve in order to realize that hydraulic oil gets into the auto-lock hydro-cylinder and promote the slider to the direction removal of locking master piston rod, second auxiliary cylinder device provides for the auto-lock hydro-cylinder and promotes locking slider to unblock The locking slide block moves towards the direction of unlocking the main piston rod to trigger the second one-way valve so as to enable hydraulic oil to enter the main oil cylinder and push the main piston rod to move towards the direction far away from the blowout preventer.
Furthermore, one end, far away from the blowout preventer, of the main oil cylinder is connected with the inlet end of the first one-way valve, the outlet end of the first one-way valve is connected with the self-locking oil cylinder, a long groove is formed in the axial direction of the main piston rod, the groove depth of the long groove is variable, and the long groove is matched with the first one-way valve for use.
Furthermore, the outlet end of the second auxiliary oil cylinder device is divided into 2 paths, one path is connected with the self-locking oil cylinder, the other path is connected with the inlet end of a second one-way valve, the outlet end of the second one-way valve is connected with one end, close to the blowout preventer, of the main oil cylinder, and the second one-way valve is matched with the locking sliding block for use.
Further, first supplementary hydro-cylinder device includes first piston rod, first hydro-cylinder and first piston head, the one end and the preventer shell body of first piston rod are connected, the other end of first piston rod stretch into in the first hydro-cylinder and with first piston head fixed connection, first piston head can remove in first hydro-cylinder, first piston rod and first piston head are hollow structure, and hydraulic oil can flow through in first piston rod and the first piston head gets into first hydro-cylinder in proper order, first hydro-cylinder is equipped with first exit end, first exit end and the one end that the preventer was kept away from to the master cylinder are connected.
Further, the second auxiliary cylinder device comprises a second piston rod, a second cylinder and a second piston head, one end of the second piston rod is connected with the shell of the blowout preventer, the other end of the second piston rod extends into the second oil cylinder and is fixedly connected with the second piston head, the second piston head can move in the second oil cylinder, the second piston rod is of a hollow structure, one end of the second piston rod, which is close to the second piston head, is provided with a hydraulic oil outlet, hydraulic oil can enter the second oil cylinder through the second piston rod, a second outlet end is arranged at one end of the second oil cylinder close to the blowout preventer, the second outlet end is divided into two paths, one path is connected with the self-locking oil cylinder, the other path is connected with the inlet end of the second one-way valve, the second oil cylinder is further provided with a hydraulic oil inlet end at one end far away from the blowout preventer, and the hydraulic oil inlet end is connected with one end, far away from the blowout preventer, of the main oil cylinder.
Further, the one end that the master cylinder pole extends to the auto-lock hydro-cylinder is equipped with the inclined end face, the locking slider is cylindrical structure, the wedge breach is seted up to the locking slider on with master cylinder pole relative position, the inclined end face uses with the wedge face cooperation of wedge breach, the unlocking hole still is seted up to the locking slider on the wedge face, the master cylinder pole can pass the unlocking hole, the contained angle of inclined end face and master cylinder pole radial direction with the contained angle of wedge face and locking slider axial direction is the same and is less than 25.
Furthermore, an eccentric hole is formed in the axial direction of the locking sliding block, an eccentric rod is arranged in the axial direction of the self-locking oil cylinder, and the eccentric rod is matched with the eccentric hole for use.
Furthermore, the automatic locking device is further provided with an indicating rod, the indicating rod is arranged in parallel with the main piston rod, one end of the indicating rod is connected with the main piston, the other end of the indicating rod penetrates through and extends to the outer side of the main oil cylinder, and the indicating rod moves along with the movement of the main piston.
Furthermore, two ends of the locking sliding block are respectively provided with a sealing element.
Further, the main piston rod comprises a piston part and a self-locking part, and the piston part and the self-locking part are detachably mounted.
Compared with the prior art, the beneficial effects of the utility model are that: according to the automatic locking device of the coiled tubing blowout preventer, the opening/closing of the flashboard and the unlocking/locking time-sharing action of the automatic locking device are realized by arranging the first auxiliary oil cylinder device, the second auxiliary oil cylinder device, the first one-way valve and the second one-way valve, so that the abrasion of a main piston rod and a locking slide block is reduced, and the service life of the device is prolonged; meanwhile, one oil path is used for solving the problems of closing, locking, unlocking and opening of the flashboard, the operation is convenient, the automatic locking device can be separated from the shell of the blowout preventer through the hydraulic oil path, and the maintenance is convenient; by arranging the indicating rod, the opening and closing state of the flashboard can be judged directly according to the position of the indicating rod, and the observation is convenient; the two ends of the locking sliding block are respectively provided with a sealing element, the inclined end surface of the main piston rod and the wedge surface of the locking sliding block are not contacted with hydraulic oil, so that the friction coefficient required by self-locking is increased, the locking effect is improved, meanwhile, friction debris cannot pollute the hydraulic oil, and the service life of the hydraulic oil is prolonged; the main piston rod is detachably mounted in a split mode, and the whole main piston rod does not need to be replaced when being seriously abraded, so that the use cost is reduced.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a plan view of the automatic locking device in a locked state.
Fig. 2 is a front view of the automatic locking device in a locked state.
Fig. 3 is a plan view of the present automatic locking device in an unlocked state.
Fig. 4 is a plan view of the automatic locking device in a maintenance state.
The hydraulic cylinder comprises a main piston rod 1, a main piston 2, a main oil cylinder 3, a self-locking oil cylinder 4, a locking slide block 5, a second one-way valve 6, a first oil cylinder 7, a first piston rod 8, a second piston rod 9, a second oil cylinder 10, a side door 11, a cylinder cover 12, a bush 13, an eccentric rod 14, an eccentric hole 15, a long bolt 16, an indication rod 17, a first one-way valve 18, a second piston head 19 and a first piston head 20.
Detailed Description
As shown in fig. 1 to 4, an automatic locking device of a coiled tubing blowout preventer comprises a main piston rod 1, a main piston 2, a main cylinder 3, a self-locking cylinder 4, a locking slider 5, a first auxiliary cylinder device, a second auxiliary cylinder device, a first check valve 18 and a second check valve 6, the first auxiliary cylinder device comprises a first piston rod 8, a first cylinder 7 and a first piston head 20, the second auxiliary cylinder device comprises a second piston rod 9, a second cylinder 10 and a second piston head 19, the automatic locking device also comprises a side door 11 and a cylinder cover 12, the main oil cylinder 3, the first oil cylinder 7 and the second oil cylinder 10 are arranged in parallel and fixed through the side door 11 and the cylinder cover 12, the side door 11 passes through bolted connection with the preventer casing, side door 11 and cylinder cap 12 are fixed through long bolt 16, cylinder cap 12 and auto-lock hydro-cylinder 4 fixed connection. One end of the main piston rod 1 is connected with a gate plate of the blowout preventer, and the other end of the main piston rod 1 sequentially penetrates through the side door 11, the main oil cylinder 3 and the cylinder cover 12 and extends into the self-locking oil cylinder 4. The main piston 2 is positioned in the main oil cylinder 3 and fixedly connected with the main piston rod 1, and the locking slide block 5 is positioned in the self-locking oil cylinder 4 and matched with the main piston rod 1 for use. Further preferably, the automatic locking device further comprises a bushing 13, the bushing 13 is located at a connection position of the cylinder cover 12 and the self-locking cylinder 4, and the main piston rod 1 can penetrate through the bushing 13. The bush 13 can play a guiding and supporting role for the main piston rod 1, and can reduce the abrasion of the main piston rod 1 at the connecting position. The outlet end of the first auxiliary oil cylinder device is connected with one end, far away from the blowout preventer, of the main oil cylinder 3, hydraulic oil enters the main oil cylinder 3 from the first auxiliary oil cylinder device and pushes the main piston 2 to move towards the direction close to the blowout preventer, the main piston rod 1 is driven to move towards the direction close to the blowout preventer through the movement of the main piston 2 towards the direction close to the blowout preventer, then the flashboard is driven to move towards the direction close to the blowout preventer, and the closing process of the flashboard is achieved. The one end that the preventer was kept away from to master cylinder 3 is connected with the entrance point of first check valve 18, the exit end of first check valve 18 is connected with auto-lock hydro-cylinder 4, be equipped with rectangular groove on the main piston rod 1 axial direction, the groove depth of rectangular groove is the reducing, furtherly the groove depth of rectangular groove diminishes gradually along the axial direction, rectangular groove and the cooperation of first check valve 18 are used. Along with the main piston rod 1 moves towards the direction close to the blowout preventer, the long strip groove gradually extrudes the first one-way valve 18 until the first one-way valve 18 is triggered, hydraulic oil enters the self-locking oil cylinder 4 from the main oil cylinder 3 and pushes the locking sliding block 5 to move towards the direction of locking the main piston rod 1, and the locking process of the main piston rod 1 is realized. The outlet end of the second auxiliary oil cylinder device is divided into 2 paths, one path is connected with the self-locking oil cylinder 4, the other path is connected with the inlet end of the second one-way valve 6, the outlet end of the second one-way valve 6 is connected with one end, close to the blowout preventer, of the main oil cylinder 3, and the second one-way valve 6 is matched with the locking sliding block 5 for use. Hydraulic oil enters the self-locking oil cylinder 4 from the second auxiliary oil cylinder device and pushes the locking slide block 5 to move towards the direction of unlocking the main piston rod 1, and the unlocking process of the main piston rod 1 is realized. Along with the locking slide block 5 moves towards the direction of unlocking the main piston rod 1, when the locking slide block 5 moves to the end part of the self-locking oil cylinder 4, the locking slide block 5 extrudes the second one-way valve 6 to trigger the second one-way valve 6, hydraulic oil enters the main oil cylinder 3 from the second auxiliary oil cylinder device and pushes the main piston rod 1 to move towards the direction far away from the blowout preventer, and the flashboard opening process is realized. The opening/closing of the flashboard and the unlocking/locking of the automatic locking device act in a time-sharing mode, the abrasion of the main piston rod 1 and the locking sliding block 5 is reduced, the service life of the device is prolonged, meanwhile, the closing, locking, unlocking and opening of the flashboard are achieved through one oil path, and the operation is convenient.
One end of the first piston rod 8 is connected with a shell of the blowout preventer, the other end of the first piston rod 8 extends into the first oil cylinder 7 and is fixedly connected with the first piston head 20, the first piston head 20 can move in the first oil cylinder 7, the first piston rod 8 and the first piston head 20 are both of a hollow structure, hydraulic oil can flow through the first piston rod 8 and the first piston head 20 in sequence to enter the first oil cylinder 7, the first oil cylinder 7 is provided with a first outlet end, and the first outlet end is connected with one end, far away from the blowout preventer, of the main oil cylinder 3. Further preferably, a first sealing ring is arranged between the first piston head 20 and the first oil cylinder 7, and the first sealing ring can increase the sealing performance between the first piston head 20 and the first oil cylinder 7, so that hydraulic oil is prevented from entering a gap between the first oil cylinder 7 and the first piston rod 8, and leakage is avoided.
The one end and the preventer casing of second piston rod 9 are connected, the other end of second piston rod 9 stretch into in the second hydro-cylinder 10 and with second piston head 19 fixed connection, second piston head 19 can move in second hydro-cylinder 10, second piston rod 9 is hollow structure, second piston rod 9 is equipped with the hydraulic oil export in the one end that is close to second piston head 19, and hydraulic oil can get into second hydro-cylinder 10 by second piston rod 9, the one end that second hydro-cylinder 10 is close to the preventer is equipped with the second exit end, the second exit end divides two ways, is connected with auto-lock hydro-cylinder 4 all the way, and another way and the entrance connection of second check valve 6, second hydro-cylinder 10 still is equipped with the hydraulic oil entrance point in the one end of keeping away from the preventer, the hydraulic oil entrance point is connected with the one end that the main oil cylinder 3 kept away from the. Further preferably, a second sealing ring is arranged between the second piston head 19 and the second cylinder 10, and the second sealing ring can increase the sealing performance between the second piston head 19 and the second cylinder 19. When hydraulic oil enters the second oil cylinder 10 from the main oil cylinder 3 through the hydraulic oil inlet end, the pressure of the hydraulic oil is gradually increased along with the increase of the hydraulic oil, the second piston head 19 can be pushed out from the second oil cylinder 10, and then the second piston rod 9 is pushed out from the second oil cylinder 10, so that the separation of the automatic locking device and the shell of the blowout preventer is realized, and the maintenance of the flashboard is convenient.
The one end that main piston rod 1 extends to auto-lock hydro-cylinder 4 is equipped with the inclined end face, locking slider 5 is cylindrical structure, locking slider 5 sets up the wedge breach on the relative position with main piston rod 1, the inclined end face uses with the wedge surface cooperation of wedge breach, locking slider 5 still sets up the unlocking hole on the wedge surface, main piston rod 1 can pass the unlocking hole, the contained angle of inclined end face and the 1 radial direction of main piston rod with the contained angle of wedge surface and 5 axial direction of locking slider is the same and is less than 25. The inclined end surface can increase the contact area of the main piston rod 1 and the locking slide block 5, increase the friction force and further increase the locking effect. The included angle is smaller than 25 degrees, so that the friction force between the inclined end face and the wedge face is larger, the locking slide block 5 is not easy to slide, and the locking state is favorably maintained.
The locking slide block 5 is provided with an eccentric hole 15 in the axial direction, the self-locking oil cylinder 4 is provided with an eccentric rod 14 in the axial direction, and the eccentric rod 14 is matched with the eccentric hole 15 for use. The eccentric rod 14 can play a guiding role, and prevent the locking slide block 5 from rotating, so that the main piston rod 1 cannot be locked, and equipment faults are caused.
The automatic locking device is further provided with an indicating rod 17, the indicating rod 17 is arranged in parallel with the main piston rod 1, one end of the indicating rod 17 is connected with the main piston 2, the other end of the indicating rod 17 penetrates through and extends to the outer side of the main oil cylinder 3, and the indicating rod 17 moves along with the movement of the main piston 2. The switch state of the flashboard can be directly judged through the position of the indicating rod 17, and the observation is convenient.
And sealing parts are respectively arranged at two ends of the locking sliding block 5. The sealing member can block hydraulic oil at the both ends of locking slider 5, avoids the contact of the inclined end face of main piston rod 1 and the scarf of locking slider 5 with hydraulic oil, has increased the coefficient of friction that the auto-lock needs, has increased the locking effect, and the piece of friction can not pollute hydraulic oil simultaneously, increases the life of hydraulic oil.
The main piston rod 1 comprises a piston part and a self-locking part, and the piston part and the self-locking part are detachably mounted. The main piston rod 1 is detachably mounted in a split mode, and does not need to be replaced in the whole process when being seriously abraded, so that the use cost can be reduced.
The automatic locking device can be suitable for a full-seal flashboard or a slip flashboard or a semi-seal flashboard of a coiled tubing blowout preventer, and can be installed with different flashboards as required in the actual operation process so as to meet the requirement of long-term well sealing.
The working principle is as follows:
closing the brake and locking: hydraulic oil enters the first oil cylinder 7 through the first piston rod 8 and the first piston head 20 and is conveyed to the main oil cylinder 3 from the first outlet end, the hydraulic oil pushes the main piston 2 to move towards the direction close to the blowout preventer in the main oil cylinder 3, the main piston 2 drives the main piston rod 1 to move towards the direction close to the blowout preventer, and the main piston rod 1 drives the gate plate to move towards the direction close to the blowout preventer, so that the gate closing action is realized. Along with the movement of the main piston rod 1, the main piston rod 1 triggers the first one-way valve 18 to enable the first one-way valve 18 to open and communicate an oil path between the main oil cylinder 3 and the self-locking oil cylinder 4, and hydraulic oil is conveyed from the main oil cylinder 3 to the self-locking oil cylinder 4 and pushes the locking sliding block 5 to move towards the direction of locking the main piston rod 1 to lock the main piston rod 1.
Unlocking and opening processes: hydraulic oil enters the second oil cylinder 10 through the second piston rod 9 and is conveyed to the self-locking oil cylinder 4 through the second outlet end, and the hydraulic oil pushes the locking slide block 5 in the self-locking oil cylinder 4 to move towards the direction of unlocking the main piston rod 1 so as to unlock the main piston rod 1. When the locking slide block 5 moves to the end part of the self-locking oil cylinder 4, the locking slide block 5 triggers the second one-way valve 6 to enable the second one-way valve 6 to be opened and communicated with an oil circuit between the second oil cylinder 10 and the main oil cylinder 3, hydraulic oil is conveyed from the second oil cylinder 10 to the main oil cylinder 3 and pushes the main piston 2 to move towards the direction far away from the blowout preventer, the main piston 2 drives the main piston rod 1 to move towards the direction far away from the blowout preventer, and the main piston rod 1 drives the flashboard to move towards the direction far away from the blowout preventer, so that the opening action is.
The flashboard maintenance process: the connecting bolt between the side door 11 and the shell of the blowout preventer is disassembled, hydraulic oil is injected into the first piston rod 8, the hydraulic oil is conveyed to the first oil cylinder 7 through the first piston head 20 and conveyed to the main oil cylinder 3 through the first oil cylinder 7, the hydraulic oil pushes the main piston 2 to move towards the direction close to the blowout preventer in the main oil cylinder 3, the main piston 2 drives the main piston rod 1 to move towards the direction close to the blowout preventer, along with the movement of the main piston rod 1, the main piston rod 1 triggers the first one-way valve 18, the first one-way valve 18 opens and connects an oil path between the main oil cylinder 3 and the self-locking oil cylinder 4, and the hydraulic oil enters the self-locking oil cylinder 4 from the main oil cylinder 3 and pushes the locking slide block 5 to move towards. The hydraulic oil is continuously injected into the first piston rod 8, along with the increase of the hydraulic oil in the main oil cylinder 3 and the increase of the pressure of the hydraulic oil, the hydraulic oil enters the second oil cylinder 10 from the main oil cylinder 3 and pushes the second piston head 19 to move, the second piston head 19 drives the second piston rod 9 to move, and then the second piston rod 9 is pushed out of the second oil cylinder 10, the automatic locking device is moved in the direction far away from the blowout preventer, so that the separation of the automatic locking device and the blowout preventer is realized, when the second piston rod 9 is completely pushed out of the second oil cylinder 10, the flashboard is located between the blowout preventer and the automatic locking device, and the replacement of the flashboard can.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an automatic locking device of coiled tubing preventer which characterized in that: the hydraulic locking device comprises a main piston rod, a main piston, a main oil cylinder, a self-locking oil cylinder, a locking slide block, a first auxiliary oil cylinder device, a second auxiliary oil cylinder device, a first check valve and a second check valve, wherein one end of the main piston rod is connected with a gate plate of a blowout preventer, the other end of the main piston rod penetrates through the main oil cylinder and extends into the self-locking oil cylinder, the main piston is positioned in the main oil cylinder and is fixedly connected with the main piston rod, the locking slide block is positioned in the self-locking oil cylinder and is matched with the main piston rod for use, the first auxiliary oil cylinder device provides hydraulic oil for the main oil cylinder, then the main piston is pushed to move towards the direction close to the blowout preventer, the first check valve is triggered by the main piston to move towards the direction close to the blowout preventer so that the hydraulic oil enters the self-locking oil cylinder and pushes the locking slide block to move towards the direction of locking the, the locking slide block moves towards the direction of unlocking the main piston rod to trigger the second one-way valve so as to enable hydraulic oil to enter the main oil cylinder and push the main piston rod to move towards the direction far away from the blowout preventer.
2. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the one end that the preventer was kept away from to the master cylinder is connected with the entrance point of first check valve, the exit end and the auto-lock hydro-cylinder of first check valve are connected, be equipped with rectangular groove on the master piston rod axial direction, the groove depth of rectangular groove is the reducing, rectangular groove and first check valve cooperation use.
3. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the outlet end of the second auxiliary oil cylinder device is divided into two paths, one path is connected with the self-locking oil cylinder, the other path is connected with the inlet end of the second one-way valve, the outlet end of the second one-way valve is connected with one end, close to the blowout preventer, of the main oil cylinder, and the second one-way valve is matched with the locking sliding block for use.
4. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the first auxiliary oil cylinder device comprises a first piston rod, a first oil cylinder and a first piston head, one end of the first piston rod is connected with the shell of the blowout preventer, the other end of the first piston rod extends into the first oil cylinder and is fixedly connected with the first piston head, the first piston head can move in the first oil cylinder, the first piston rod and the first piston head are both of a hollow structure, hydraulic oil can flow through the first piston rod and the first piston head in sequence to enter the first oil cylinder, the first oil cylinder is provided with a first outlet end, and the first outlet end is connected with one end, far away from the blowout preventer, of the main oil cylinder.
5. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the second auxiliary oil cylinder device comprises a second piston rod, a second oil cylinder and a second piston head, one end of the second piston rod is connected with the blowout preventer shell, the other end of the second piston rod extends into the second oil cylinder and is fixedly connected with the second piston head, the second piston head can move in the second oil cylinder, the second piston rod is of a hollow structure, one end of the second piston rod, which is close to the second piston head, is provided with a hydraulic oil outlet, hydraulic oil can enter the second oil cylinder through the second piston rod, a second outlet end is arranged at one end of the second oil cylinder close to the blowout preventer, the second outlet end is divided into two paths, one path is connected with the self-locking oil cylinder, the other path is connected with the inlet end of the second one-way valve, the second oil cylinder is further provided with a hydraulic oil inlet end at one end far away from the blowout preventer, and the hydraulic oil inlet end is connected with one end, far away from the blowout preventer, of the main oil cylinder.
6. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the one end that the master piston pole extends to the auto-lock hydro-cylinder is equipped with the inclined end face, the locking slider is cylindrical structure, the wedge breach is seted up to the locking slider on with master piston pole relative position, the wedge face cooperation of inclined end face and wedge breach is used, the unlocking hole still is seted up to the locking slider on the wedge face, the unlocking hole can be passed to the master piston pole, the inclined end face with the radial direction of master piston pole the contained angle of wedge face with the locking slider axial direction is the same and is less than 25.
7. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the locking slide block is provided with an eccentric hole in the axial direction, the self-locking oil cylinder is provided with an eccentric rod in the axial direction, and the eccentric rod is matched with the eccentric hole for use.
8. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the automatic locking device is further provided with an indicating rod, the indicating rod is arranged in parallel with the main piston rod, one end of the indicating rod is connected with the main piston, the other end of the indicating rod penetrates through the main oil cylinder and extends to the outer side of the main oil cylinder, and the indicating rod moves along with the movement of the main piston.
9. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: and sealing parts are respectively arranged at two ends of the locking sliding block.
10. The automatic locking apparatus of a coiled tubing blowout preventer of claim 1, wherein: the main piston rod comprises a piston part and a self-locking part, and the piston part and the self-locking part are detachably mounted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020663324.4U CN212105820U (en) | 2020-04-27 | 2020-04-27 | Automatic locking device of coiled tubing blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020663324.4U CN212105820U (en) | 2020-04-27 | 2020-04-27 | Automatic locking device of coiled tubing blowout preventer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116838284A (en) * | 2023-09-01 | 2023-10-03 | 河北新铁虎石油机械有限公司 | Hydraulic locking device of ram blowout preventer with elastic locking and double-stage oil cylinder unlocking functions |
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2020
- 2020-04-27 CN CN202020663324.4U patent/CN212105820U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116838284A (en) * | 2023-09-01 | 2023-10-03 | 河北新铁虎石油机械有限公司 | Hydraulic locking device of ram blowout preventer with elastic locking and double-stage oil cylinder unlocking functions |
| CN116838284B (en) * | 2023-09-01 | 2023-11-07 | 河北新铁虎石油机械有限公司 | Hydraulic locking device of ram blowout preventer with elastic locking and double-stage oil cylinder unlocking functions |
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