CN109519143B - Four-flashboard continuous oil pipe blowout preventer - Google Patents
Four-flashboard continuous oil pipe blowout preventer Download PDFInfo
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- CN109519143B CN109519143B CN201910035942.6A CN201910035942A CN109519143B CN 109519143 B CN109519143 B CN 109519143B CN 201910035942 A CN201910035942 A CN 201910035942A CN 109519143 B CN109519143 B CN 109519143B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
Abstract
The invention relates to a four-gate coiled tubing blowout preventer. The technical scheme is as follows: the sealing device comprises a main shell and a hydraulic cylinder, wherein a full sealing device, a shearing device, a suspension device and a semi-sealing device are sequentially arranged in an inner cavity of the main shell from top to bottom, and a sealing carrier is supported on the lower end face of an upper joint to realize sealing through a flashboard closing support and a return spring during well sealing; when the well is repaired, the flashboard opening piston group is driven to move downwards through hydraulic pressure, the sealing carrier is pushed away, the sealing carrier is further pressed downwards, the sealing carrier rotates around the rotating shaft of the flashboard, and the coiled tubing can go into the underground along the inner cavity of the upper joint. The invention has the beneficial effects that: because the whole seal is a vertical structure, namely at least one double wing is removed, the operation space is expanded, and personal injury accidents in the operation are greatly reduced; the weight of the whole device is greatly reduced, so that the processing cost is reduced due to the difficulty in operation, and compared with the original 4FZ blowout preventer, the blowout preventer is safer and more reliable, is more convenient to use, is lower in processing cost and is lighter in weight.
Description
Technical Field
The invention relates to a coiled tubing well plugging device and a method, in particular to a four-flashboard coiled tubing well plugging device.
Background
In the construction of coiled tubing in oil production, a 4FZ blowout preventer, i.e., a four-ram blowout preventer, is a safety protection device that must be installed, and in this device, the coiled tubing four-ram blowout preventer plays a significant role in coiled tubing operations, and is a device for preventing blowout during the coiled tubing operations. The four gate plate assembly is configured, so that the non-pipe sealing of a well mouth, the shearing of an oil pipe, the suspension of the oil pipe and the sealing with the pipe can be realized; the hydraulic locking device is suitable for high-pressure well heads and H2S working environments, adopts hydraulic drive, is high in response speed, is manually locked, and is high in safety factor.
Wherein, totally seal the safety guarantee effect when playing the well of retiring after cuting, realize that the well head does not have a tub and seals, but in 4FZ preventer, because the sealed mode of present totally seal, what adopt is the mode that hydraulic pressure and manual combine together, because adopt mechanical system, consequently often as an alternative when the hydraulic control mode is out of control, so not commonly used, and the hydraulic pressure mode commonly used is because the well time of retiring of some wells overlength, often can take place because the accident that produces the blowout well because of the dramatic change of season or weather, like this, not only can cause serious pollution to the environment, sometimes also can cause huge injury to the human body.
In addition, the half seal in the prior art is also called as a pipe seal, and the half seal of the original 4FZ blowout preventer is also controlled by hydraulic pressure, and the transverse double-hydraulic cylinder sealing mode has the following defects: since the two half seal gate plates are butted, the sealing performance is greatly influenced by the hydraulic pressure and the shape, and therefore, the half seal cannot completely recover the sealing performance even when the sealing part is abraded and pressurized in operation.
The Chinese patent document with the publication number of 206290235U has the patent name of coiled tubing four-ram blowout preventer, wherein a full-seal ram, a shearing ram, a suspension ram and a half-seal ram are sequentially arranged in an inner cavity of a shell from top to bottom, four groups of hydraulic cylinders are symmetrically arranged on two sides of the shell, and pistons are arranged in the hydraulic cylinders; the inner end of the piston is respectively movably connected with the rear ends of the full-sealing flashboards, the shearing flashboards, the hanging flashboards and the half-sealing flashboards which respectively correspond to the inner end of the piston through a hanging table. The fully-closed gate plate consists of two fully-closed gate plate bodies with symmetrical structures, and square grooves are formed below the fully-closed gate plate bodies; the inner ends of the full-sealing gate plate bodies are embedded with full-sealing blocks through guide keys, each full-sealing block consists of an upper sizing block, a lower sizing block and a full-sealing rubber block clamped between the upper sizing block and the lower sizing block, the upper edge and the lower edge of the front end of each full-sealing rubber block are flush with the front end faces of the upper sizing block and the lower sizing block, and the sealing surface of the front end of each full-sealing rubber block is a convex arc surface; the upper half part of the outer wall of the full-sealing flashboard body is embedded with an arc top sealing block, and the arc top sealing block is of a lip-shaped rubber sealing-assisting structure with inclination. It adopts hydraulic drive, and the hand wheel locking has nevertheless promoted factor of safety, still has long-time shut-in well, when hydraulic failure appears, leads to appearing the oil leak or the accident of blowout well appears.
The Chinese patent document with the publication number of 202090881U and the patent name of 'hydraulic double-ram blowout preventer with integral full-closed ram', consists of a shell, an upper-layer ram system and a lower-layer ram system which are parallel to each other, wherein the upper-layer ram in the upper-layer ram system in the shell is two symmetrical half-closed rams, and the common hydraulic drive and manual locking mechanisms with two symmetrical sides are adopted to block and prevent blowout from two sides to the middle of a wellhead channel in the shell; the lower flashboard in the lower flashboard system is an integral full-sealing flashboard, and is blocked and blowout-prevented from one side of a wellhead channel in the shell to the other side by adopting a full-hydraulic driving mechanism with asymmetric one side; wherein: the two symmetrical upper flashboards are both composite flashboards of steel parts and rubber parts, and are in soft contact sealing with an upper flashboard movable chamber in the shell and a drill rod or an oil pipe in a wellhead channel by the aid of the rubber parts clamped above and in the middle of the flashboards; the lower layer flashboard is an integral alloy structural steel part and is in hard contact sealing with two elastic valve seats which are arranged above and below the junction of the lower layer flashboard movable chamber and the wellhead channel in the shell. This patent has adopted integral full-closed flashboard, but its drive mode has installed lower floor's flashboard movable chamber additional in the outside of preventer, has not only increased wellhead assembly's volume, still promotes lower floor's flashboard through hydraulic mode and gets into the elastic valve seat when the shut-in well and realize sealing entirely moreover, and in addition, this structural design also is not applicable to in the blowout preventer that coiled tubing dedicated four flashboards blowout preventers used.
Therefore, aiming at the phenomenon, the invention adopts a full-bore flashboard sealing mode and combines a modified semi-sealing structure to finish the special blowout preventer for the coiled tubing.
Disclosure of Invention
The invention aims to overcome the defects existing in the prior art, and provides a four-gate coiled tubing blowout preventer which completely overcomes the defects that the original double gates are influenced by underground pressure and underground hydraulic control pressure after being transversely butted.
The invention provides a four-gate coiled tubing blowout preventer, which adopts the technical scheme that: comprises a main shell (19) and a hydraulic cylinder (20), wherein a full-sealing device, a shearing device, a suspension device and a semi-sealing device are sequentially arranged in an inner cavity of the main shell (19) from top to bottom, the hydraulic cylinder (20) is arranged on the outer side of the main shell (19) and used for driving the full-sealing device, the shearing device, the suspension device or the semi-sealing device to act, the full-sealing device comprises an upper joint (1), a full-sealing outer cylinder sleeve (2), a flashboard fixing bolt (3), a flashboard rotating shaft (4), a flashboard opening piston group (5), a connecting oil nozzle (6), sealing rubber (7), a sealing carrier (8), a flashboard closing support (9), a return spring (10) and a cutting and hanging body (11), the upper joint (1) and the cutting and hanging body (11) are fixedly connected through the full-sealing outer cylinder sleeve (2), and a flashboard rotating cavity is arranged between the upper joint (, a flashboard fixing bolt (3) is arranged on one side of the lower end of the upper joint (1), a circular sealing carrier (8) is movably connected through a flashboard rotating shaft (4), and sealing rubber (7) is arranged on the upper surface of the sealing carrier (8) and used for sealing with the lower end face of the upper joint (1); a flashboard opening piston group (5) is arranged on the other side of the upper joint (1), a cavity on the upper side of the flashboard opening piston group (5) is communicated with a connecting oil nozzle (6) on the outer side of the full-sealing outer cylinder sleeve (2), the connecting oil nozzle (6) is communicated with a hydraulic cylinder (20), and the lower end face of the flashboard opening piston group (5) is contacted with a sealing carrier (8); a plurality of return springs (10) are arranged on the upper side of the cutting and hanging body (11), the upper ends of the return springs (10) are connected with a circular flashboard closing support (9), and when a well is sealed, a sealing carrier (8) is supported on the lower end face of the upper connector (1) through the flashboard closing support (9) and the return springs (10) to realize sealing; when a well is repaired, the flashboard opening piston group (5) is driven to move downwards through hydraulic pressure, the sealing carrier (8) is pushed away, the sealing carrier (8) is further pressed downwards, the sealing carrier (8) rotates around the flashboard rotating shaft (4), and the coiled tubing can be put into the well along the inner cavity of the upper joint (1).
Preferably, above-mentioned flashboard closes support (9) and includes connection pad (9.1) and guiding axle (9.2), connection pad (9.1) are the ring structure, fixes a plurality of guiding axles (9.2) in the downside of connection pad (9.1), and guiding axle (9.2) stretch out downwards to insert and surely hang the reserve cylindrical groove on body (11) in, guiding axle (9.2) can reciprocate along reserving cylindrical groove, and when connection pad (9.1) moves down, seal carrier (8) rotate downwards round flashboard pivot (4).
Preferably, the lower part of the guide shaft (9.2) is provided with a reserved hole, and a return spring (10) is arranged between the reserved hole of the guide shaft (9.2) and the reserved cylindrical groove of the cutting and hanging body (11).
Preferably, a return spring (10) is arranged outside the guide shaft (9.2), the lower end of the return spring (10) is arranged at the upper end part of the cutting and hanging body (11), and the upper end of the return spring (10) is in contact with the lower surface of the connecting disc (9.1).
Preferably, a circle of hydraulic oil groove (21) is formed between the fully-sealed outer cylinder sleeve (2) and the upper connector (1), a communicating hole is formed between the flashboard opening piston group (5) and the hydraulic oil groove (21), and hydraulic oil of the hydraulic cylinder (20) is enabled to push the flashboard opening piston group (5) to move downwards through the connecting oil nozzle (6), the hydraulic oil groove (21) and the communicating hole.
Preferably, the shutter opening piston group (5) is provided with six groups of pistons.
Preferably, six guide shafts (9.2) are provided.
Preferably, the outer diameter of the sealing carrier (8) is larger than the outer diameter of the sealing rubber (7), and the outer diameter of the sealing rubber (7) is larger than the inner diameter of the upper joint (1); the outer diameter of the seal carrier (8) is smaller than the outer diameter of the shutter closing support (9).
Preferably, the semi-sealing device comprises an annular outer cylinder sleeve (14), a setting piston (15), an annular semi-seal (16), a lower joint (17) and a sealing bushing (18), the annular upper joint (22) and the lower joint (17) are fixedly connected through the annular outer cylinder sleeve (14), the sealing bushing (18) is arranged on the inner wall of the annular upper joint (22), the setting piston (15) is arranged between the annular outer cylinder sleeve (14) and the sealing bushing (18), the annular semi-seal (16) is arranged between the setting piston (15) and the lower joint (17), a hydraulic oil nozzle (23) is arranged on the outer side of the annular outer cylinder sleeve (14), and the annular semi-seal (16) extrudes a continuous oil pipe to realize annular sealing by driving the setting piston (15) to move downwards through hydraulic pressure.
Preferably, the annular semi-seal (16) is of a semi-annular structure, and a groove is formed in the middle of the outer side of the annular semi-seal.
The invention has the beneficial effects that: the full-sealing device provided by the invention is safer and more reliable, and as the power source of the blowout of the oil well comes from the underground stratum, the larger the underground power is, the tighter the sealing is, and the better the sealing effect is; the hydraulic cylinder is not affected by the fault of the hydraulic cylinder during full sealing, only when the well needs to be repaired or the oil well needs to be opened, the sealing carrier is opened through hydraulic pressure, and the return spring is compressed and stored when the sealing carrier is opened;
the improved semi-seal device is adopted, hydraulic oil is injected between the ring seal outer cylinder sleeve and the seal bushing to push the seat seal piston to move downwards and extrude the annular semi-seal made of rubber, so that the annular semi-seal is deformed and extruded on the outer wall of the continuous oil pipe to form the semi-seal, the sealing effect is good, and the problem of use abrasion of a steel part is solved;
the full seal and the half seal are both vertical structures, namely two double wings are removed, so that the operation space is expanded, and personal injury accidents and the like in the operation are greatly reduced; the weight of the whole device is greatly reduced, so that the difficulty in operation reduces the processing cost.
Fourthly, the outer wall of the annular semi-seal is provided with an annular structure, so that the middle part of the sealing rubber cylinder can be deformed firstly, the formed sealing shape is more beneficial to sealing, and the sealing performance of the semi-seal is greatly improved;
in conclusion, the improvement of the present invention is safer and more reliable than the original 4FZ blowout preventer, more convenient to use, less expensive to machine, and lighter in weight.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the structure A-A;
FIG. 3 is a schematic view of the structure B-B;
FIG. 4 is a schematic view of the seal carrier and the shutter closing bracket in a lowered state;
FIG. 5 is a partial schematic view of the seal carrier fully opened;
FIG. 6 is a schematic structural view of embodiment 2 of the present invention;
FIG. 7 is a schematic structural view of embodiment 3 of the present invention;
in the upper diagram: the hydraulic sealing device comprises an upper joint 1, a full-sealing outer cylinder sleeve 2, a gate plate fixing bolt 3, a gate plate rotating shaft 4, a gate plate opening piston group 5, a connecting oil nozzle 6, sealing rubber 7, a sealing carrier 8, a gate plate closing support 9, a return spring 10, a cutting and hanging body 11, a cutter 12, a slip 13, a ring-sealing outer cylinder sleeve 14, a setting piston 15, a ring-shaped half seal 16, a lower joint 17, a sealing bush 18, a main shell 19, a hydraulic cylinder 20, a hydraulic oil groove 21, a ring-sealing upper joint 22, a hydraulic oil nozzle 23, a continuous oil pipe 24, a connecting disc 9.1 and a guide shaft 9.2.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In embodiments 1 to 5, the invention provides a four-ram coiled tubing blowout preventer, which has the technical scheme that: the hydraulic cylinder sealing device comprises a main shell 19 and a hydraulic cylinder 20, wherein a full sealing device, a shearing device, a suspension device and a half sealing device are sequentially arranged in an inner cavity of the main shell 19 from top to bottom, the hydraulic cylinder 20 is arranged on the outer side of the main shell 19 and used for driving the full sealing device, the shearing device, the suspension device or the half sealing device to act, the full sealing device comprises an upper joint 1, a full sealing outer cylinder sleeve 2, a gate plate fixing bolt 3, a gate plate rotating shaft 4, a gate plate opening piston group 5, a connecting oil nozzle 6, sealing rubber 7, a sealing carrier 8, a gate plate closing support 9, a return spring 10 and a cutting and hanging body 11, the upper joint 1 and the cutting and hanging body 11 are fixedly connected through the full sealing outer cylinder sleeve 2, a gate plate rotating cavity is arranged between the upper joint 1 and the cutting and hanging body 11, a gate plate fixing bolt 3 is arranged on one side of the lower end of, the upper surface of the sealing carrier 8 is provided with a sealing rubber 7 for sealing with the lower end surface of the upper joint 1; a flashboard opening piston group 5 is arranged on the other side of the upper joint 1, a cavity on the upper side of the flashboard opening piston group 5 is communicated with a connecting oil nozzle 6 on the outer side of the full-sealing outer cylinder sleeve 2, the connecting oil nozzle 6 is communicated with a hydraulic cylinder 20, and the lower end face of the flashboard opening piston group 5 is in contact with a sealing carrier 8; a plurality of return springs 10 are arranged on the upper side of the cutting and hanging body 11, the upper ends of the return springs 10 are connected with a circular flashboard closing support 9, and when a well is sealed, a sealing carrier 8 is supported on the lower end face of the upper connector 1 through the flashboard closing support 9 and the return springs 10 to realize sealing; when the well is repaired, the flashboard opening piston group 5 is driven to move downwards through hydraulic pressure, the sealing carrier 8 is pushed to be pushed away, the sealing carrier 8 is further pressed downwards to rotate around the flashboard rotating shaft 4, and the coiled tubing can be put into the underground along the inner cavity of the upper joint 1.
Referring to fig. 3, the shutter closing bracket 9 of the present invention includes a connecting plate 9.1 and guide shafts 9.2, the connecting plate 9.1 is a circular ring structure, a plurality of guide shafts 9.2 are fixed on the lower side of the connecting plate 9.1, the guide shafts 9.2 extend downward and are inserted into the reserved cylindrical grooves on the cutting and hanging body 11, the guide shafts 9.2 can move up and down along the reserved cylindrical grooves, and when the connecting plate 9.1 moves downward, the seal carrier 8 rotates downward around the shutter 4.
Wherein, the lower part of guiding axle 9.2 is equipped with the preformed hole, is equipped with back spring 10 between the preformed hole of guiding axle 9.2 and the preformed cylindrical groove of surely hanging body 11.
Referring to the attached figure 2, a circle of hydraulic oil groove 21 is arranged between the fully-sealed outer cylinder sleeve 2 and the upper joint 1, and a communication hole is arranged between the flashboard opening piston group 5 and the hydraulic oil groove 21, so that hydraulic oil of the hydraulic cylinder 20 pushes the flashboard opening piston group 5 to move downwards through the connecting oil nozzle 6, the hydraulic oil groove 21 and the communication hole.
Wherein, the flashboard opening piston group 5 is provided with six groups of pistons, thus, when the flashboard closing bracket 9 is opened, the six groups of pistons are simultaneously pushed downwards, the flashboard closing bracket 9 is convenient to move downwards or upwards longitudinally,
in addition, above-mentioned guiding axle 9.2 is equipped with six, and the guiding axle can reciprocate along cutting the reservation cylindrical groove of hanging on the body 11, makes the gate plate close support 9 can steady lift.
The outer diameter of the sealing carrier 8 is larger than that of the sealing rubber 7, and the outer diameter of the sealing rubber 7 is larger than the inner diameter of the upper joint 1; the outer diameter of the seal carrier 8 is smaller than the outer diameter of the shutter closing bracket 9; it should be noted that: the gate plate opening piston group 5 is pressed down at a part of the position of the sealing carrier 8, so that the sealing carrier can be opened by means of hydraulic force, after the opening is completed, the pressure in the underground and the outside is communicated and released, the sealing carrier can rotate and fall around the gate plate rotating shaft 4 by means of the gravity of the sealing carrier, and the whole sealing carrier 8 is completely opened until the descending height of the sealing carrier 8 reaches the diameter length of the sealing carrier 8, so that the continuous oil pipe 24 can be operated to descend into the underground, and a partial schematic diagram when the sealing carrier is completely opened is shown by referring to the attached drawing 5.
The full-sealing device adopts a wheel shaft structure, the acting point of the underground pressure is at the center of the sealing flashboard, and when the sealing flashboard is opened, the hydraulic pressure is adopted to push one side of the sealing flashboard, so that the opening resistance is greatly reduced, and the sealing flashboard is easier to open.
Referring to the attached drawing 1, the semi-sealing device comprises an annular sealing outer cylinder sleeve 14, a setting piston 15, an annular semi-seal 16, a lower joint 17 and a sealing bush 18, wherein the annular sealing upper joint 22 is fixedly connected with the lower joint 17 through the annular sealing outer cylinder sleeve 14, the sealing bush 18 is arranged on the inner wall of the annular sealing upper joint 22, the setting piston 15 is arranged between the annular sealing outer cylinder sleeve 14 and the sealing bush 18, the annular semi-seal 16 is arranged between the setting piston 15 and the lower joint 17, a hydraulic oil nozzle 23 is arranged on the outer side of the annular sealing outer cylinder sleeve 14, and the annular semi-seal 16 is driven to squeeze a continuous oil pipe to realize annular sealing by driving the setting piston 15 to move downwards through hydraulic pressure.
Preferably, the annular semi-seal 16 is a sealing rubber tube with a semi-annular structure, and two groups of semi-annular structures can hold the coiled tubing tightly to realize semi-seal, also called as ring seal; in addition, the middle part of the outer side of the annular semi-seal 16 is provided with a groove, so that the middle part of the sealing rubber cylinder is firstly deformed when the annular semi-seal is deformed under the action of hydraulic pressure, and the formed sealing shape is more beneficial to sealing.
The assembly process and the use process of the semi-sealing device are as follows:
connecting a sealing bush 18 to the inner wall of an annular seal upper joint 22 below the cutting and hanging body 11, placing a seat seal piston 15 on the outer space of the sealing bush 18, connecting an annular seal outer cylinder sleeve 14 to the outer wall of the annular seal upper joint 22, connecting the lower side of the annular seal outer cylinder sleeve 14 with a lower joint 17, installing an annular semi-seal 16 between the lower joint 17 and the seat seal piston 15, and arranging a hydraulic oil nozzle 23 on the outer side of the annular seal outer cylinder sleeve 14 to finish the assembly of the semi-seal device;
when the semi-seal device is used, hydraulic oil is injected between the ring seal outer cylinder sleeve 14 and the seal bushing 18 by the hydraulic oil nozzle 23 through the hydraulic cylinder, the seat seal piston 15 is pushed to move downwards, the ring-shaped semi-seal 16 is extruded, the ring-shaped semi-seal is deformed and extruded on the continuous oil pipe to form a semi-seal or called a ring seal, and when the semi-seal device is unsealed, the pressure is released, the seal rubber cylinder is restored under the action of elasticity, and the semi-seal can be removed.
In addition, after the coiled tubing is fed, the coiled tubing to be cut is cut by a cutter 12 of the cutting device; if the coiled tubing needs to be hung, the continuous tubing is clamped through slips 13 of the hanging device; if the production needs to be controlled, the oil production can be regulated by regulating the pressure in the flashboard opening piston group 5 and the opening degree of the sealing flashboard.
The invention provides a using method of a four-gate coiled tubing blowout preventer, which is characterized by comprising the following steps of:
firstly, assembling a full-sealing device on a four-gate coiled tubing blowout preventer:
a sealing flashboard consisting of sealing rubber 7 and a sealing carrier 8 is movably connected to a flashboard fixing bolt 3 through a flashboard rotating shaft 4, so that the sealing flashboard can rotate around the flashboard rotating shaft 4, and then the flashboard fixing bolt 3 is fixedly connected to an upper joint 1; then the sealing flashboard is rotated downwards, and the flashboard opening piston group 5 is assembled on the upper joint 1; then, the sealing flashboard is rotated upwards, the flashboard closing support 9 and the return spring 10 are placed on the upper portion of the cutting and hanging body 11, and finally the full-sealing outer cylinder sleeve 2 is assembled to complete the assembly of the full-sealing device;
secondly, when an oil well needs to be completely sealed, as the cutting and hanging body 11 is internally provided with the return spring 10, the return spring 10 upwards supports the flashboard closing support 9 to the sealing carrier 8 through the compressed elastic force, the sealing rubber 7 is arranged on the upper surface of the sealing carrier 8, the lower end surface of the upper joint is sealed through the sealing flashboard formed by the sealing rubber 7 and the sealing carrier 8, and the pressure under the oil well is increased along with the increase of time, so that the sealing flashboard is more firmly attached to the lower end of the upper joint, and the full sealing state is kept;
thirdly, when the totally enclosed device needs to be opened for well repair, the hydraulic cylinder 20 is opened, hydraulic pressure is applied to the flashboard opening piston group 5 through the connecting oil nozzle 6, the flashboard opening piston group 5 and the seal carrier 8 are driven to move downwards, the flashboard closing support 9 is pushed to move downwards, the return spring 10 is compressed, the right end of the seal carrier 8 is lowered along with the flashboard closing support 9, the right end of the seal carrier starts to rotate around the flashboard rotating shaft 4 under the action of gravity until the flashboard closing support 9 is lowered to a height higher than the diameter of the seal carrier 8, the seal carrier 8 is completely opened, at the moment, a continuous oil pipe or a well repair tool is put in, and well repair operation is started.
In addition, when the semi-sealing device is used, hydraulic oil is injected between the ring-sealed outer cylinder sleeve 14 and the sealing bush 18 by the hydraulic oil nozzle 23 through the hydraulic cylinder, the seat seal piston 15 is pushed to move downwards, the annular semi-seal 16 is extruded, the annular semi-seal is deformed and extruded on the continuous oil pipe, and the semi-seal is formed.
Because the full seal and the half seal of the invention are vertical structures, namely two double wings of the four-ram blowout preventer are removed, the operation space is expanded, and personal injury accidents and the like in the operation are greatly reduced; the weight of the whole device is greatly reduced, so that the difficulty in operation reduces the processing cost.
Example 3, referring to fig. 7, the present invention is different from examples 1 and 2 in that: the well sealing device adopted by the invention adopts the full sealing device, the shearing device and the suspension device in the embodiments 1 and 2, but the semi-sealing device adopts the semi-sealing device in the prior art, so that the improvement of the invention is only limited to the full sealing device, and specifically comprises the following steps:
the invention comprises a main shell 19 and a hydraulic cylinder 20, wherein a full-sealing device, a shearing device, a suspension device and a half-sealing device are sequentially arranged in the inner cavity of the main shell 19 from top to bottom, the hydraulic cylinder 20 is arranged on the outer side of the main shell 19 and is used for driving the full-sealing device, the shearing device, the suspension device or the half-sealing device to act, the full-sealing device comprises an upper joint 1, a full-sealing outer cylinder sleeve 2, a gate plate fixing bolt 3, a gate plate rotating shaft 4, a gate plate opening piston group 5, a connecting oil nozzle 6, sealing rubber 7, a sealing carrier 8, a gate plate closing support 9, a return spring 10 and a cutting and hanging body 11, the upper joint 1 and the cutting and hanging body 11 are fixedly connected through the full-sealing outer cylinder sleeve 2, a gate plate cavity for rotating the gate plate is arranged between the upper joint 1 and the cutting and hanging body 11, the gate plate fixing bolt 3 is arranged on, the upper surface of the sealing carrier 8 is provided with a sealing rubber 7 for sealing with the lower end surface of the upper joint 1; a flashboard opening piston group 5 is arranged on the other side of the upper joint 1, a cavity on the upper side of the flashboard opening piston group 5 is communicated with a connecting oil nozzle 6 on the outer side of the full-sealing outer cylinder sleeve 2, the connecting oil nozzle 6 is communicated with a hydraulic cylinder 20, and the lower end face of the flashboard opening piston group 5 is in contact with a sealing carrier 8; a plurality of return springs 10 are arranged on the upper side of the cutting and hanging body 11, the upper ends of the return springs 10 are connected with a circular flashboard closing support 9, and when a well is sealed, a sealing carrier 8 is supported on the lower end face of the upper connector 1 through the flashboard closing support 9 and the return springs 10 to realize sealing; when the well is repaired, the flashboard opening piston group 5 is driven to move downwards through hydraulic pressure, the sealing carrier 8 is pushed to be pushed away, the sealing carrier 8 is further pressed downwards to rotate around the flashboard rotating shaft 4, and the coiled tubing can be put into the underground along the inner cavity of the upper joint 1.
The whole seal of the invention adopts a vertical structure, namely a double wing is removed, so that the operation space is expanded to a certain extent, and the other three parts are combined with the existing four-ram blowout preventer, so that the weight of the whole device is greatly reduced, the difficulty in operation is reduced, the processing cost is reduced, and personal injury accidents in operation are reduced to a certain extent.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a four flashboards coiled tubing blowout preventers, includes main casing body (19) and pneumatic cylinder (20), from last full sealing device, shearing mechanism, linkage and half sealing device of down installing in proper order in the inner chamber of main casing body (19), installs pneumatic cylinder (20) in the outside of main casing body (19) for drive is sealed device, shearing mechanism, linkage or half sealing device action entirely, characterized by: the full-sealing device comprises an upper joint (1), a full-sealing outer cylinder sleeve (2), a flashboard fixing bolt (3), a flashboard rotating shaft (4), a flashboard opening piston group (5), a connecting oil nozzle (6), sealing rubber (7), a sealing carrier (8), a flashboard closing support (9), a return spring (10) and a cutting and hanging body (11), wherein the upper joint (1) and the cutting and hanging body (11) are fixedly connected through the full-sealing outer cylinder sleeve (2), a flashboard rotating cavity is arranged between the upper joint (1) and the cutting and hanging body (11), the flashboard fixing bolt (3) is arranged on one side of the lower end of the upper joint (1), the circular sealing carrier (8) is movably connected through the flashboard rotating shaft (4), and the sealing rubber (7) is arranged on the upper surface of the sealing carrier (8) and used for sealing with the lower end face of the upper joint (1); a flashboard opening piston group (5) is arranged on the other side of the upper joint (1), a cavity on the upper side of the flashboard opening piston group (5) is communicated with a connecting oil nozzle (6) on the outer side of the full-sealing outer cylinder sleeve (2), the connecting oil nozzle (6) is communicated with a hydraulic cylinder (20), and the lower end face of the flashboard opening piston group (5) is contacted with a sealing carrier (8); a plurality of return springs (10) are arranged on the upper side of the cutting and hanging body (11), the upper ends of the return springs (10) are connected with a circular flashboard closing support (9), and when a well is sealed, a sealing carrier (8) is supported on the lower end face of the upper connector (1) through the flashboard closing support (9) and the return springs (10) to realize sealing; when a well is repaired, the flashboard opening piston group (5) is driven to move downwards through hydraulic pressure, the sealing carrier (8) is pushed away, the sealing carrier (8) is further pressed downwards, the sealing carrier (8) rotates around the flashboard rotating shaft (4), and the coiled tubing can be put into the well along the inner cavity of the upper joint (1);
the flashboard closing support (9) comprises a connecting disc (9.1) and guide shafts (9.2), the connecting disc (9.1) is of a circular structure, the guide shafts (9.2) are fixed on the lower side of the connecting disc (9.1), the guide shafts (9.2) extend downwards and are inserted into reserved cylindrical grooves in the cutting and hanging body (11), the guide shafts (9.2) can move up and down along the reserved cylindrical grooves, and when the connecting disc (9.1) moves downwards, the sealing carrier (8) rotates downwards around the flashboard rotating shaft (4);
a preformed hole is formed in the lower portion of the guide shaft (9.2), and a return spring (10) is arranged between the preformed hole of the guide shaft (9.2) and the preformed cylindrical groove of the cutting and hanging body (11);
the semi-sealing device comprises an annular sealing outer cylinder sleeve (14), a setting piston (15), an annular semi-seal (16), a lower joint (17) and a sealing bush (18), wherein the annular sealing upper joint (22) is fixedly connected with the lower joint (17) through the annular sealing outer cylinder sleeve (14), the sealing bush (18) is arranged on the inner wall of the annular sealing upper joint (22), the setting piston (15) is arranged between the annular sealing outer cylinder sleeve (14) and the sealing bush (18), the annular semi-seal (16) is arranged between the setting piston (15) and the lower joint (17), a hydraulic oil nozzle (23) is arranged on the outer side of the annular sealing outer cylinder sleeve (14), and the setting piston (15) is driven to move downwards through hydraulic pressure to enable the annular semi-seal (16) to extrude a continuous oil pipe to realize annular sealing;
the annular semi-seal (16) is of a semi-annular structure, and a groove is formed in the middle of the outer side of the annular semi-seal;
in addition, when the four-gate coiled tubing blowout preventer needs to be semi-sealed, the assembling process and the using process of the semi-sealing device are as follows:
connecting a sealing bush (18) to the inner wall of an upper ring seal joint (22) below a cutting and hanging body (11), placing a seat seal piston (15) on the outer space of the sealing bush (18), connecting an outer ring seal cylinder sleeve (14) to the outer wall of the upper ring seal joint (22), connecting the lower side of the outer ring seal cylinder sleeve (14) with a lower joint (17), arranging an annular semi-seal (16) between the lower joint (17) and the seat seal piston (15), and arranging a hydraulic oil nozzle (23) on the outer side of the outer ring seal cylinder sleeve (14) to finish the assembly of the semi-seal device;
when the semi-seal device is used, hydraulic oil is injected between the ring seal outer cylinder sleeve (14) and the seal bushing (18) by the hydraulic cylinder through the hydraulic oil nozzle (23), the seat seal piston (15) is pushed to move downwards, the annular semi-seal (16) is extruded, the annular semi-seal is deformed and extruded on the continuous oil pipe, the semi-seal or the ring seal is formed, when the semi-seal device is unsealed, only pressure is released, the seal rubber cylinder is restored under the action of elasticity, and the semi-seal can be removed.
2. The four-ram coiled tubing blowout preventer of claim 1, wherein: the outer side of the guide shaft (9.2) is provided with a return spring (10), the lower end of the return spring (10) is arranged at the upper end part of the cutting and hanging body (11), and the upper end of the return spring (10) is in contact with the lower surface of the connecting disc (9.1).
3. The four-ram coiled tubing blowout preventer of claim 1, wherein: a circle of hydraulic oil groove (21) is arranged between the full-sealing outer cylinder sleeve (2) and the upper joint (1), a communicating hole is formed between the flashboard opening piston group (5) and the hydraulic oil groove (21), and hydraulic oil of the hydraulic cylinder (20) is enabled to move downwards by connecting the oil nozzle (6), the hydraulic oil groove (21) and the communicating hole.
4. The four-ram coiled tubing blowout preventer of claim 1, wherein: the flashboard opening piston group (5) is provided with six groups of pistons.
5. The four-ram coiled tubing blowout preventer of claim 1, wherein: six guide shafts (9.2) are arranged.
6. The four-ram coiled tubing blowout preventer of claim 1, wherein: the outer diameter of the sealing carrier (8) is larger than that of the sealing rubber (7), and the outer diameter of the sealing rubber (7) is larger than the inner diameter of the upper joint (1); the outer diameter of the seal carrier (8) is smaller than the outer diameter of the shutter closing support (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910035942.6A CN109519143B (en) | 2019-01-15 | 2019-01-15 | Four-flashboard continuous oil pipe blowout preventer |
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|---|---|---|---|
| CN201910035942.6A CN109519143B (en) | 2019-01-15 | 2019-01-15 | Four-flashboard continuous oil pipe blowout preventer |
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| CN109519143A CN109519143A (en) | 2019-03-26 |
| CN109519143B true CN109519143B (en) | 2021-06-04 |
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| CN201910035942.6A Active CN109519143B (en) | 2019-01-15 | 2019-01-15 | Four-flashboard continuous oil pipe blowout preventer |
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| CN112983331B (en) * | 2021-03-24 | 2021-12-07 | 大庆市天德忠石油科技有限公司 | Hydraulic double-gate plate well plugging device |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3329214A (en) * | 1965-02-25 | 1967-07-04 | Schlumberger Technology Corp | Full-opening well tool |
| CN2070353U (en) * | 1990-07-12 | 1991-01-30 | 刘子荣 | Blow-out preventer for smooth rod break out |
| US5564675A (en) * | 1994-10-19 | 1996-10-15 | Camco International Inc. | Subsurface safety valve of minimized length |
| NO306310B1 (en) * | 1991-04-26 | 1999-10-18 | Halliburton Energy Serv Inc | Valve for use in an underground well, and valve system |
| CN2485412Y (en) * | 2001-05-14 | 2002-04-10 | 中国石油天然气股份有限公司 | Blow out preventer on hole top |
| CN2617918Y (en) * | 2003-03-31 | 2004-05-26 | 甄业盛 | Polish rod aligning blowout preventer of pumping well |
| GB2400125A (en) * | 2001-11-30 | 2004-10-06 | Baker Hughes Inc | Closure mechanism with integrated actuator for subsurface valves |
| CN2660101Y (en) * | 2003-11-24 | 2004-12-01 | 中国石油天然气股份有限公司 | Wellhead pollution preventer of beam unit |
| EP1069279B1 (en) * | 1999-07-13 | 2005-05-18 | Halliburton Energy Services, Inc. | Flapper valve with biasing flapper closure assembly |
| GB2410050B (en) * | 2002-10-03 | 2006-11-01 | Baker Hughes Inc | Lock open tool for downhole safety valve |
| JP2008249056A (en) * | 2007-03-30 | 2008-10-16 | Tlv Co Ltd | Check valve |
| CN201250633Y (en) * | 2008-07-31 | 2009-06-03 | 河北华北石油荣盛机械制造有限公司 | Blowout preventer assembly of a continuous oil pipe |
| WO2010045583A2 (en) * | 2008-10-17 | 2010-04-22 | Strictly Green, Llc | Fuel leak prevention system |
| CN201915889U (en) * | 2010-12-30 | 2011-08-03 | 宝鸡市赛孚石油机械有限公司 | Hydraulic control four-ram blowout preventer |
| CN102383759A (en) * | 2010-09-05 | 2012-03-21 | 杨桂青 | Multifunctional blowout preventer specially used for steam-driven well |
| CN102828718A (en) * | 2012-04-26 | 2012-12-19 | 付吉平 | Portable insurance type testing instrument wellhead falling preventing device |
| WO2014189494A1 (en) * | 2013-05-21 | 2014-11-27 | Halliburton Energy Services, Inc. | Tubing pressure insensitive surface controlled subsurface safety valve |
| CN204533676U (en) * | 2015-01-20 | 2015-08-05 | 王伟 | There is the reversed check valve of releasing pressure automatically function |
| CN206290235U (en) * | 2016-12-14 | 2017-06-30 | 宝鸡市赛孚石油机械有限公司 | The ram preventer of coiled tubing four |
| CN207260983U (en) * | 2017-10-18 | 2018-04-20 | 大庆中科激光完井技术服务有限公司 | A kind of rod breakage of screw pump blowout hookup |
| CN207277338U (en) * | 2017-08-04 | 2018-04-27 | 中国建筑第二工程局有限公司 | A kind of pile end grouting device with inverse-stopping functions |
| CN108005606A (en) * | 2018-01-02 | 2018-05-08 | 陈艳来 | A kind of unlimited accumulation of energy sealing device |
-
2019
- 2019-01-15 CN CN201910035942.6A patent/CN109519143B/en active Active
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3329214A (en) * | 1965-02-25 | 1967-07-04 | Schlumberger Technology Corp | Full-opening well tool |
| CN2070353U (en) * | 1990-07-12 | 1991-01-30 | 刘子荣 | Blow-out preventer for smooth rod break out |
| NO306310B1 (en) * | 1991-04-26 | 1999-10-18 | Halliburton Energy Serv Inc | Valve for use in an underground well, and valve system |
| US5564675A (en) * | 1994-10-19 | 1996-10-15 | Camco International Inc. | Subsurface safety valve of minimized length |
| EP1069279B1 (en) * | 1999-07-13 | 2005-05-18 | Halliburton Energy Services, Inc. | Flapper valve with biasing flapper closure assembly |
| CN2485412Y (en) * | 2001-05-14 | 2002-04-10 | 中国石油天然气股份有限公司 | Blow out preventer on hole top |
| GB2400125A (en) * | 2001-11-30 | 2004-10-06 | Baker Hughes Inc | Closure mechanism with integrated actuator for subsurface valves |
| GB2410050B (en) * | 2002-10-03 | 2006-11-01 | Baker Hughes Inc | Lock open tool for downhole safety valve |
| CN2617918Y (en) * | 2003-03-31 | 2004-05-26 | 甄业盛 | Polish rod aligning blowout preventer of pumping well |
| CN2660101Y (en) * | 2003-11-24 | 2004-12-01 | 中国石油天然气股份有限公司 | Wellhead pollution preventer of beam unit |
| JP2008249056A (en) * | 2007-03-30 | 2008-10-16 | Tlv Co Ltd | Check valve |
| CN201250633Y (en) * | 2008-07-31 | 2009-06-03 | 河北华北石油荣盛机械制造有限公司 | Blowout preventer assembly of a continuous oil pipe |
| WO2010045583A2 (en) * | 2008-10-17 | 2010-04-22 | Strictly Green, Llc | Fuel leak prevention system |
| CN102383759A (en) * | 2010-09-05 | 2012-03-21 | 杨桂青 | Multifunctional blowout preventer specially used for steam-driven well |
| CN201915889U (en) * | 2010-12-30 | 2011-08-03 | 宝鸡市赛孚石油机械有限公司 | Hydraulic control four-ram blowout preventer |
| CN102828718A (en) * | 2012-04-26 | 2012-12-19 | 付吉平 | Portable insurance type testing instrument wellhead falling preventing device |
| WO2014189494A1 (en) * | 2013-05-21 | 2014-11-27 | Halliburton Energy Services, Inc. | Tubing pressure insensitive surface controlled subsurface safety valve |
| CN204533676U (en) * | 2015-01-20 | 2015-08-05 | 王伟 | There is the reversed check valve of releasing pressure automatically function |
| CN206290235U (en) * | 2016-12-14 | 2017-06-30 | 宝鸡市赛孚石油机械有限公司 | The ram preventer of coiled tubing four |
| CN207277338U (en) * | 2017-08-04 | 2018-04-27 | 中国建筑第二工程局有限公司 | A kind of pile end grouting device with inverse-stopping functions |
| CN207260983U (en) * | 2017-10-18 | 2018-04-20 | 大庆中科激光完井技术服务有限公司 | A kind of rod breakage of screw pump blowout hookup |
| CN108005606A (en) * | 2018-01-02 | 2018-05-08 | 陈艳来 | A kind of unlimited accumulation of energy sealing device |
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Effective date of registration: 20210519 Address after: 163712 Daqing, Heilongjiang, Guangdong Province, Hun Road District, Chengfeng south two road north public building A11 Business Service Building 9 Applicant after: DAQING DANFENG PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: No. 260, Huanghe Road, Kenli District, Dongying City, Shandong Province 257000 Applicant before: Chen Chao |
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