CN109519143A - Four flashboard coiled tubing blowout preventers - Google Patents
Four flashboard coiled tubing blowout preventers Download PDFInfo
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- CN109519143A CN109519143A CN201910035942.6A CN201910035942A CN109519143A CN 109519143 A CN109519143 A CN 109519143A CN 201910035942 A CN201910035942 A CN 201910035942A CN 109519143 A CN109519143 A CN 109519143A
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- flashboard
- seal
- coiled tubing
- top connection
- hydraulic
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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
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
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Abstract
The present invention relates to a kind of four flashboard coiled tubing blowout preventers.Its technical solution is: including main casing and hydraulic cylinder, full seal apparatus, shear, suspension arrangement and half seal apparatus are successively installed from top to bottom in the inner cavity of main casing, when shut-in well, bracket and return spring is closed by flashboard, sealing is realized into the lower end surface that seal carrier is supported on top connection；When well workover, piston group is opened by hydraulic-driven flashboard and is moved down, and pushes seal carrier open, is further pushed, rotates seal carrier around flashboard shaft, coiled tubing can be along under the lower going-into-well of top connection inner cavity.The beneficial effects of the present invention are: eliminating at least one double-vane due to being sealed entirely as vertical structure, so that working space is extended, greatly reducing the personal traumatic incidents in operation；Also greatly reduce the weight of whole device, in this way, the difficulty in operation reduces processing charges, than original 4FZ preventer more secure and reliable, using more convenient, processing charges is lower, and weight is lighter.
Description
Technical field
The present invention relates to a kind of coiled tubing well-sealing device and method, in particular to a kind of four flashboard coiled tubings shut-in well
Device.
Background technique
In the work progress of coiled tubing in Petroleum Production, 4FZ preventer, that is, four ram preventers, it is one
The safety device that kind must be installed, in this arrangement, four ram preventer of coiled tubing has in continuous oil pipe operation
Very important status, for preventing from occurring the equipment of blowout during continuous oil pipe operation.Four flashboard assemblies are configured, it can be real
For existing well head without the seal of tube, oil pipe shearing, has the seal of tube at oil pipe suspension；Suitable for high-pressure well mouth and H2S working environment, using liquid
Pressure driving, fast response time, and have manual locking, safety coefficient is high.
Wherein, safety guarantee effect when stopping well after shearing is closed entirely, realizes well head without the seal of tube, but in 4FZ blowout prevention
In device, due to the existing sealing means sealed entirely, using hydraulic with the mode combined manually, due to using machinery side
Formula, therefore often as a kind of a kind of alternative when hydraulic control mode is out of control, so be of little use, and common hydraulic way
Stop well overlong time due to some wells, the accident for generating gusher because of the great change of season or weather can usually occur, in this way,
Serious pollution can be not only caused to environment, can also cause huge injury to the person sometimes.
In addition, in the prior art half seals, also referred to as there is the seal of tube, in half envelope of original 4FZ preventer, and by hydraulic
It is controlled, the mode of this transverse direction double hydraulic cylinder sealing, its disadvantages are that: since two and half envelope flashboards are docking
, so its leakproofness, is affected by hydraulic coupling and shape, therefore in operation, often there is half envelope because of sealing position quilt
The case where abrasion repressurization can not restore sealing performance completely.
Chinese patent literature Publication No. 206290235U, patent name are " four ram preventer of coiled tubing ", shell
Blind rams, shear ram, suspension flashboard and half envelope flashboard, the shell two sides pair are sequentially installed in intracoelomic cavity from top to bottom
Title is equipped with four groups of fluid cylinders, and piston is respectively arranged in fluid cylinder；The piston inner end passes through hanging platform and corresponding full envelope respectively
Flashboard, shear ram, suspension flashboard and half envelope flashboard back end activity connection.Wherein, the blind rams is by two symmetrical structures
Blind rams body composition, and all have square groove below blind rams body；End passes through feather key in the blind rams body
Embedded with hermetically sealed piece, described hermetically sealed piece is made of upper lower padding iron and the hermetically sealed rubber block being clamped between upper lower padding iron,
The lower edges of the hermetically sealed rubber block front end are concordant with upper lower padding iron front end face, and its forward end seal face is protrusion circular arc
Face；The external wall upper half of blind rams is embedded with arched top sealing block, and arched top sealing block is the lip shape rubber with gradient
Glue helps seal structure.It uses hydraulic-driven, and handwheel locking still has prolonged envelope although improving safety coefficient
Well when there is hydraulic failure, causes the accident for oil leak or gusher occur to occur.
Chinese patent literature Publication No. 202090881U, patent name are the " double disc that surges of monoblock type blind rams
Preventer ", it is made of shell, the upper layer gate panel system being parallel to each other and lower layer's gate panel system, upper layer gate panel system in shell
In upper layer flashboard be two pieces of symmetrical half envelope flashboards, using the symmetrical hydraulic-driven in common both sides and Manual locking mechanism,
Two sides in well head channel block blowout prevention to centre out of shell；Lower layer's flashboard in lower layer's gate panel system is that one piece of monoblock type is sealed entirely
Flashboard, using the asymmetric full hydraulic drive mechanism in side, one side in well head channel block to the other side anti-out of shell
Spray；Wherein: two pieces of symmetrical upper layer flashboards are the combined type flashboards of steel and iron parts folder rubber parts, by being clipped in above flashboard and
Intermediate rubber parts, in the intracorporal upper layer flashboard recreation room of shell and well head channel drilling rod or oil pipe is soft contacts sealing；Lower layer
Flashboard is whole alloy structure steel part, be mounted in shell above lower layer's flashboard recreation room and well head channel intersection and
Two following elastic seats contact sealing firmly.The patent uses monoblock type blind rams, but its driving method is anti-
The outside of spray apparatus has installed lower layer's flashboard recreation room additional, not only increases the volume of wellhead assembly, but also is passed through in shut-in well
Hydraulic mode pushes lower layer's flashboard to enter elastic seat and realizes full envelope, in addition, structure design is not suitable for continuous yet
In the blowout preventer of dedicated four ram preventer of oil pipe.
Therefore, for this phenomenon, present invention employs the modes of full-bore ram seal, in conjunction with modified half sealed knot
Structure, to complete the Special preventer of coiled tubing.
Summary of the invention
The purpose of the present invention is to drawbacks described above of the existing technology, provide a kind of four flashboard coiled tubings shut-in well
Device, the shortcomings that influence after overcoming original double disc laterally to dock completely by fluid control pressure in the pressure influence and well of underground,
After such scheme modifying, the sealing of sealing damper can be tighter with the raising of the pressure of underground sealing, and the fluid control pressure on well
It can thoroughly discharge, the sealing without influencing flashboard.
The four flashboard coiled tubing blowout preventer of one kind that the present invention mentions, technical solution is: including main casing (19) and liquid
Cylinder pressure (20) is successively installed full seal apparatus, shear, suspension arrangement and half in the inner cavity of main casing (19) from top to bottom and is encapsulated
It sets, hydraulic cylinder (20) is installed on the outside of main casing (19), for driving full seal apparatus, shear, suspension arrangement or half
Seal apparatus movement, the full seal apparatus include top connection (1), seal outer cylinder sheath (2), flashboard fixing bolt (3), flashboard shaft entirely
(4), flashboard is opened piston group (5), connection oil nozzle (6), seal rubber (7), seal carrier (8), flashboard closing bracket (9), is returned
Power spring (10), cut hang ontology (11), by seal full outer cylinder sheath (2) by top connection (1), cut hang ontology (11) be fixedly connected, and
Top connection (1) and the cavity hung and be equipped with gate rotation between ontology (11) is cut, the side in top connection (1) lower end is solid equipped with flashboard
Determine bolt (3), is flexibly connected circular seal carrier (8) by flashboard shaft (4), and set in the upper surface of seal carrier (8)
There are seal rubber (7), for sealing with the lower end surface of top connection (1)；Flashboard, which is equipped with, in the other side of top connection (1) opens piston
Group (5), and it is communicated to the connection oil nozzle (6) on the outside of full envelope outer cylinder sheath (2) in the upside cavity that flashboard opens piston group (5), and
It is connected to by connection oil nozzle (6) with hydraulic cylinder (20), the lower end surface that the flashboard opens piston group (5) connects with seal carrier (8)
Touching；Described cuts the upside for hanging ontology (11) equipped with multiple return springs (10), and the upper end of return spring (10) connects circular ring shape
Flashboard close bracket (9), when shut-in wells, bracket (9) and return spring (10) are closed by flashboard and are supported on seal carrier (8)
Realize sealing in the lower end surface of top connection (1)；When well workover, piston group (5) are opened by hydraulic-driven flashboard and are moved down, and push sealing open
Carrier (8) further pushes, and rotates seal carrier (8) around flashboard shaft (4), coiled tubing can be along top connection (1)
Under the lower going-into-well of inner cavity.
Preferably, it includes terminal pad (9.1) and guiding axis (9.2), the terminal pad that above-mentioned flashboard, which closes bracket (9),
It (9.1) is cirque structure, in the fixed multiple guiding axis (9.2) in the downside of terminal pad (9.1), guiding axis (9.2) is extended downwardly,
And be inserted into the reserved cylindrical groove cut and hung on ontology (11), guiding axis (9.2) can move down on reserved cylindrical groove
Dynamic, when terminal pad (9.1) moves down, seal carrier (8) is rotated down around flashboard shaft (4).
Preferably, the lower part of above-mentioned guiding axis (9.2) is arranged with preformed hole, guiding axis (9.2) preformed hole and cut extension
Return spring (10) are equipped between the reserved cylinder groove of ontology (11).
Preferably, return spring (10) are equipped on the outside of above-mentioned guiding axis (9.2), the lower end setting of return spring (10) is being cut
Hang the upper end of ontology (11), the upper end of return spring (10) and the following table face contact of terminal pad (9.1).
Preferably, a hydraulic oil groove (21) of circle is equipped between above-mentioned full envelope outer cylinder sheath (2) and top connection (1), and described
Flashboard, which is opened, is equipped with intercommunicating pore between piston group (5) and hydraulic oil groove (21), the hydraulic oil of hydraulic cylinder (20) is made to pass through connection oil
Mouth (6), hydraulic oil groove (21) and intercommunicating pore push flashboard to open piston group (5) and move down.
Preferably, above-mentioned flashboard opens piston group (5) and is equipped with six groups of pistons.
Preferably, above-mentioned guiding axis (9.2) is equipped with the six roots of sensation.
Preferably, the outer diameter of above-mentioned seal carrier (8) is greater than the outer diameter of seal rubber (7), the seal rubber (7) it is outer
Diameter is greater than the internal diameter of top connection (1)；The outer diameter of the seal carrier (8) is less than the outer diameter that flashboard closes bracket (9).
Preferably, above-mentioned half seal apparatus include ring seal outer cylinder sheath (14), set piston (15), half envelope (16) of annular, under connect
Head (17), seal cartridge (18), are fixedly connected between ring seal top connection (22) and lower contact (17) by ring seal outer cylinder sheath (14),
Seal cartridge (18) are equipped in the inner wall of ring seal top connection (22), are equipped between ring seal outer cylinder sheath (14) and seal cartridge (18)
Piston (15) are set, half envelope (16) of annular are equipped between piston (15) and lower contact (17) setting, in ring seal outer cylinder sheath (14)
Outside is equipped with hydraulic oil nozzle (23), sets piston (15) by hydraulic-driven and moves down, and half envelope (16) of annular is made to squeeze coiled tubing
Realize ring seal.
Preferably, above-mentioned half envelope (16) of annular is semi-circular shape structure, and middle part is equipped with groove on the outside.
The beneficial effects of the present invention are: first is that full seal apparatus provided by the invention is more safe and reliable, since oil well occurs
For the power source of blowout from down-hole formation, the power of underground is bigger, and sealing is tighter, and sealing effect is better；Moreover, when full envelope
It is not influenced by hydraulic cylinder failure, only when needing well workover or opening oil well, just needs to open hydraulic cylinder, by hydraulic
Power opens seal carrier, and carries out compression to return spring when opening seal carrier and store power, when needing full oil sealing well, only needs
Workover tool or coiled tubing are extracted out from well head, it can seal carrier is pushed into top connection under the action of return spring
Lower end surface, realize sealing, it is easy for operation；
Second is that, by the way that hydraulic oil to be injected between ring seal outer cylinder sheath and seal cartridge, pushing seat using improved half seal apparatus
Envelope piston moves down, and squeezes annular made of rubber half and seal, and makes half envelope deformable squeeze of annular in coiled tubing outer wall, is formed
Half seals, and sealing effect is good, avoids the wear problem that uses of steelwork, and the present invention can be convenient annular made of replacement rubber
Half seals, to both improve sealing effect, and convenient for safeguarding；
Third is that being vertical structure due to sealing and partly sealing entirely, that is, two double-vanes are eliminated, so that working space is extended, greatly
The personal traumatic incidents etc. in operation are reduced greatly；Also greatly reduce the weight of whole device, in this way, the difficulty in operation
Degree reduces processing charges.
Fourth is that the outer wall of half envelope of annular is equipped with ring structure, in this way, can make to deform first in the middle part of cartridge, such shape
At sealing shape be more conducive to seal, the leakproofness of half envelope is just greatly improved raising；
In short, improvement of the invention is than original 4FZ preventer more secure and reliable, using more convenient, processing charges is lower, weight
It is lighter.
Detailed description of the invention
Attached drawing 1 is structural schematic diagram of the invention；
Attached drawing 2 is A-A structural schematic diagram；
Attached drawing 3 is B-B structural schematic diagram；
Status diagram when attached drawing 4 is seal carrier and flashboard closing bracket decline；
Attached drawing 5 is the partial schematic diagram that seal carrier fully opens；
Attached drawing 6 is a schematic structural view of Embodiment 2 of the present invention；
Attached drawing 7 is a schematic structural view of Embodiment 3 of the present invention；
In upper figure: top connection 1, full envelope outer cylinder sheath 2, flashboard fixing bolt 3, flashboard shaft 4, flashboard open piston group 5, connection oil
Mouth 6, seal rubber 7, seal carrier 8, flashboard close bracket 9, return spring 10, cut and hang ontology 11, cutter 12, slips 13, ring
Envelope outer cylinder sheath 14 sets piston 15, annular half envelope 16, lower contact 17, seal cartridge 18, main casing 19, hydraulic cylinder 20, hydraulic oil
Slot 21, ring seal top connection 22, hydraulic oil nozzle 23, coiled tubing 24, terminal pad 9.1 and guiding axis 9.2.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment 1-5, the four flashboard coiled tubing blowout preventer of one kind that the present invention mentions, technical solution is: including main casing
Body 19 and hydraulic cylinder 20 successively install full seal apparatus, shear, suspension arrangement and half in the inner cavity of main casing 19 from top to bottom
Seal apparatus is equipped with hydraulic cylinder 20 in the outside of main casing 19, for driving full seal apparatus, shear, suspension arrangement or half
Seal apparatus movement, the full seal apparatus include top connection 1, full envelope outer cylinder sheath 2, flashboard fixing bolt 3, flashboard shaft 4, flashboard
Piston group 5, connection oil nozzle 6, seal rubber 7, seal carrier 8, flashboard is opened to close bracket 9, return spring 10, cut extension ontology
11, by seal full outer cylinder sheath 2 by top connection 1, cut hang ontology 11 be fixedly connected, and top connection 1 and cut hang ontology 11 between be equipped with
The cavity of gate rotation is equipped with flashboard fixing bolt 3 in the side of 1 lower end of top connection, is flexibly connected circle by flashboard shaft 4
Seal carrier 8, and be equipped with seal rubber 7 in the upper surface of seal carrier 8, for the sealing of the lower end surface of top connection 1；Upper
The other side of connector 1 is equipped with flashboard and opens piston group 5, and is communicated to full envelope outer shell in the upside cavity that flashboard opens piston group 5
The connection oil nozzle 6 in 2 outside of set, and be connected to by connecting oil nozzle 6 with hydraulic cylinder 20, the flashboard opens the lower end surface of piston group 5
It is contacted with seal carrier 8；Described cuts the upside for hanging ontology 11 equipped with multiple return springs 10, and the upper end of return spring 10 connects
The flashboard of circular ring shape closes bracket 9, when shut-in well, closes bracket 9 and return spring 10 by flashboard and is supported on seal carrier 8
Realize sealing in the lower end surface of connector 1；When well workover, piston group 5 is opened by hydraulic-driven flashboard and is moved down, and pushes seal carrier 8 open,
It further pushes, rotates seal carrier 8 around flashboard shaft 4, coiled tubing can be along under 1 inner cavity lower going-into-well of top connection.
Referring to attached drawing 3, it includes terminal pad 9.1 and guiding axis 9.2, the terminal pad 9.1 that flashboard of the invention, which closes bracket 9,
For cirque structure, in the fixed multiple guiding axis 9.2 in the downside of terminal pad 9.1, guiding axis 9.2 is extended downwardly, and is inserted into and cuts
Hang ontology 11 on reserved cylindrical groove in, guiding axis 9.2 can be moved up and down along reserved cylindrical groove, terminal pad 9.1 to
When lower mobile, seal carrier 8 is rotated down around flashboard shaft 4.
Wherein, the lower part of guiding axis 9.2 is arranged with preformed hole, guiding axis 9.2 preformed hole with cut hang ontology 11 it is pre-
It stays and is equipped with return spring 10 between cylinder groove.
A hydraulic oil groove 21 of circle is equipped with referring to attached drawing 2, between full envelope outer cylinder sheath 2 of the invention and top connection 1, and described
Flashboard, which is opened, is equipped with intercommunicating pore between piston group 5 and hydraulic oil groove 21, the hydraulic oil of hydraulic cylinder 20 is made to pass through connection oil nozzle 6, liquid
Pressure oil groove 21 and intercommunicating pore push flashboard to open piston group 5 and move down.
Wherein, above-mentioned flashboard opens piston group 5 and is equipped with six groups of pistons, in this way, when opening flashboard closing bracket 9, six groups
Piston pushes down on simultaneously, closes 9 longitudinal direction of bracket convenient for flashboard and moves down or move up,
In addition, above-mentioned guiding axis 9.2 is equipped with the six roots of sensation, guiding axis can move down on the reserved cylindrical groove hung on ontology 11 along cutting
It is dynamic, so that flashboard is closed bracket 9 and smoothly goes up and down.
The outer diameter of seal carrier 8 of the invention is greater than the outer diameter of seal rubber 7, and the outer diameter of the seal rubber 7 is greater than upper
The internal diameter of connector 1；The outer diameter of the seal carrier 8 is less than the outer diameter that flashboard closes bracket 9；It should be understood that flashboard is opened
A part of position of seal carrier 8 is pressed under piston group 5, by hydraulic strength when enabling to open seal carrier in this way, and
After the completion of unlatching, since underground obtains being connected to release with extraneous pressure, so that it may be realized by seal carrier self gravity
It rotates and falls around flashboard shaft 4, until when the height that seal carrier 8 declines reaches the diameter length of seal carrier 8, it is entire close
Envelope carrier 8 fully opens, in this manner it is possible to operate under 24 lower going-into-well of coiled tubing, referring to attached drawing 5, shows seal carrier
Partial schematic diagram when fully opening.
Full seal apparatus of the invention uses wheel shaft structure, the impetus for the pressure that underground is come at the center of sealing damper,
And when opening sealing damper, due to the side using hydraulic drive sealing damper, the resistance opened in this way be will be greatly reduced, and make it
More easily open.
Referring to attached drawing 1, half seal apparatus of the invention include ring seal outer cylinder sheath 14, set piston 15, half envelope 16 of annular, under connect
First 17, seal cartridge 18 is fixedly connected by ring seal outer cylinder sheath 14 between ring seal top connection 22 and lower contact 17, is connect on ring seal
First 22 inner wall is equipped with seal cartridge 18, is equipped between ring seal outer cylinder sheath 14 and seal cartridge 18 and sets piston 15, is setting
It is equipped with half envelope 16 of annular between piston 15 and lower contact 17, hydraulic oil nozzle 23 is equipped on the outside of ring seal outer cylinder sheath 14, by hydraulic
Driving sets piston 15 and moves down, and so that half envelope 16 of annular is squeezed coiled tubing and realizes ring seal.
Preferably, above-mentioned half envelope 16 of annular is the cartridge of semi-circular shape structure, and the structures of two groups of semi-circular shape can be with
It holds coiled tubing tightly, realizes that half seals, also referred to as ring seal；In addition, the outer middle side part in half envelope 16 of annular is equipped with groove, it can be hydraulic
Under the action of, when promoting half envelope deformation of annular, make to deform first in the middle part of cartridge, the sealing shape formed in this way is more conducively close
Envelope.
Half seal apparatus assembling process of the invention and use process is as follows:
Seal cartridge 18 is connected to 22 inner wall of ring seal top connection cut and hung under ontology 11, setting piston 15 is put into seal cartridge
On 18 exterior space, then ring seal outer cylinder sheath 14 is connected to the outer wall of ring seal top connection 22, the downside of ring seal outer cylinder sheath 14 connects
Lower contact 17 is connect, half envelope 16 of annular is installed between lower contact 17 and setting piston 15, and in the outside of ring seal outer cylinder sheath 14
Equipped with hydraulic oil nozzle 23, the assembling of half seal apparatus is completed；
Half seal apparatus is in use, hydraulic oil is injected into ring seal outer cylinder sheath 14 and seal cartridge 18 by hydraulic oil nozzle 23 by hydraulic cylinder
Between, it pushes setting piston 15 to move down, and squeeze half envelope 16 of annular, makes half envelope deformable squeeze of annular in coiled tubing, shape
It is sealed at half or is ring seal, when deblocking, as long as pressure is released, cartridge is restored under the effect of elasticity, can release half envelope.
In addition, the cutter 12 with regard to passing through shear for needing to shear is sheared after complete under coiled tubing；It needs
Suspension is then clamped coiled tubing operation by the slips 13 of suspension arrangement；If necessary to control yield, can also pass through
The pressure in flashboard unlatching piston group 5 is adjusted, oil liquid production is adjusted in the open degree for adjusting sealing damper.
The application method for the four flashboard coiled tubing blowout preventer of one kind that the present invention mentions, it is characterized in that the following steps are included:
Firstly, in the four full seal apparatus of flashboard coiled tubing blowout preventer over-assemble:
The sealing damper that seal rubber 7 and seal carrier 8 are formed, is movably connected in flashboard fixing bolt by flashboard shaft 4
3, it rotates sealing damper around flashboard shaft 4, then flashboard fixing bolt 3 is fastened in top connection 1；Still further below
Flashboard unlatching piston group 5 is assembled into top connection 1 by rotary seal flashboard；Then, it is rotated up sealing damper, flashboard is closed
Close bracket 9, return spring 10 is put into the top cut and hang ontology 11, finally, the full envelope outer cylinder sheath 2 of assembling, completes the group of full seal apparatus
Dress；
Second, when needing full oil sealing well, return spring 10 is equipped in ontology 11 due to cutting to hang, return spring 10 passes through compression
Flashboard is closed the support seal carrier 8 upwards of bracket 9 by elastic force, and the upper surface of seal carrier 8 is equipped with seal rubber 7, passes through sealing
The sealing damper that rubber 7 and seal carrier 8 form seals the lower end surface of top connection, the pressure under oil well with the time increasing
Length is increasing, in this way, the lower end for being fitted in top connection that sealing damper is stronger, keeps full envelope state；
Third opens hydraulic cylinder 20 when needing to open full seal apparatus progress well workover, is opened and is lived to flashboard by connection oil nozzle 6
Plug group 5 applies hydraulic, and driving flashboard is opened piston group 5 and seal carrier 8 and moved down, thus push flashboard close bracket 9 to
Lower movement, and return spring 10 is compressed, the right end of seal carrier 8 is then being weighed with the continuation falling head of flashboard closing bracket 9
Under power effect, start to rotate around flashboard shaft 4, until flashboard closes the height that bracket 9 decrease beyond 8 diameter of seal carrier
Afterwards, seal carrier 8 then fully opens, at this time tripping in coiled tubing or workover tool, starts to carry out workover treatment.
In addition, half seal apparatus of the invention is in use, hydraulic oil is injected into outside ring seal by hydraulic cylinder by hydraulic oil nozzle 23
Between cylinder sleeve 14 and seal cartridge 18, setting piston 15 is pushed to move down, and squeeze half envelope 16 of annular, makes half envelope deformation of annular
It is extruded in coiled tubing, half is formed and seals.
Since full envelope of the invention and half envelope are vertical structure, that is, two double-vanes of four ram preventers are eliminated, are made
It obtains working space to be extended, greatly reduces the personal traumatic incidents etc. in operation；Also make the weight of whole device significantly
Reduce, in this way, the difficulty in operation reduces processing charges.
Embodiment 2, referring to attached drawing 6, difference from Example 1 of the present invention is: return spring is equipped on the outside of guiding axis 9.2
10, the upper end cut and hang ontology 11, the upper end of return spring 10 and the following table of terminal pad 9.1 is arranged in the lower end of return spring 10
Face contact, in this way, guiding axis can equally moved up and down along the reserved cylinder groove for hanging ontology 11 is cut, meanwhile, the bullet of savings
When spring compressing force can make shut-in well, sealing damper is expressed on the lower end surface of top connection；In addition, the guiding axis being arranged herein
9.2 can use solid construction, due to not needing to install spring in guiding axis inner cavity, not have to use hollow structure.
Embodiment 3, referring to attached drawing 7, the present invention is a difference in that with Examples 1 and 2: the well-sealing device that the present invention uses,
Using full seal apparatus, shear and the suspension arrangement in Examples 1 and 2, but half seal apparatus is using the prior art
Half seal apparatus, it is specifically as follows in this way, improvement of the invention is just only limitted to full seal apparatus:
The present invention includes main casing 19 and hydraulic cylinder 20, successively installs full seal apparatus from top to bottom in the inner cavity of main casing 19, cuts
Cutting apparatus, suspension arrangement and half seal apparatus are equipped with hydraulic cylinder 20 in the outside of main casing 19, for driving full seal apparatus, cutting
Cutting apparatus, suspension arrangement or the movement of half seal apparatus, the full seal apparatus includes top connection 1, envelope outer cylinder sheath 2, flashboard are fixed entirely
Bolt 3, flashboard shaft 4, flashboard open piston group 5, connection oil nozzle 6, seal rubber 7, seal carrier 8, flashboard close bracket 9,
Return spring 10 is cut and hangs ontology 11, by seal full outer cylinder sheath 2 by top connection 1, cut and hang ontology 11 and be fixedly connected, and 1 He of top connection
The cavity hung and be equipped with gate rotation between ontology 11 is cut, flashboard fixing bolt 3 is equipped in the side of 1 lower end of top connection, passes through lock
Plate shaft 4 is flexibly connected circular seal carrier 8, and is equipped with seal rubber 7 in the upper surface of seal carrier 8, for above connect
First 1 lower end surface sealing；Flashboard is equipped in the other side of top connection 1 and opens piston group 5, and opens the upper of piston group 5 in flashboard
Side cavity is communicated to the connection oil nozzle 6 in complete 2 outside of envelope outer cylinder sheath, and is connected to by connecting oil nozzle 6 with hydraulic cylinder 20, the flashboard
The lower end surface for opening piston group 5 is contacted with seal carrier 8；The upside for cutting extension ontology 11 is equipped with multiple return springs 10,
The flashboard of the upper end connection circular ring shape of return spring 10 closes bracket 9, when shut-in well, passes through flashboard and closes bracket 9 and return spring
Sealing is realized in the lower end surface that seal carrier 8 is supported on top connection 1 by 10；When well workover, piston group 5 is opened by hydraulic-driven flashboard
It moves down, and pushes seal carrier 8 open, further push, rotate seal carrier 8 around flashboard shaft 4, coiled tubing can be along
Under 1 inner cavity lower going-into-well of top connection.
Since full envelope of the invention uses vertical structure, that is, a double-vane is eliminated, so that working space has obtained centainly
Extension, other three parts combine existing four ram preventer, also greatly reduce the weight of whole device, this
Sample, the difficulty in operation reduce processing charges, also a degree of personal traumatic incidents etc. reduced in operation.
The above, is only part preferred embodiment of the invention, and anyone skilled in the art may benefit
Equivalent technical solution is modified or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention
Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.
Claims (10)
1. a kind of four flashboard coiled tubing blowout preventers, including main casing (19) and hydraulic cylinder (20), in the inner cavity of main casing (19)
Full seal apparatus, shear, suspension arrangement and half seal apparatus are successively installed from top to bottom, are equipped on the outside of main casing (19)
Hydraulic cylinder (20), for driving full seal apparatus, shear, suspension arrangement or the movement of half seal apparatus, it is characterized in that: described is complete
Seal apparatus includes top connection (1), seals outer cylinder sheath (2), flashboard fixing bolt (3), flashboard shaft (4), flashboard unlatching piston group entirely
(5), oil nozzle (6) are connected, seal rubber (7), seal carrier (8), flashboard closing bracket (9), return spring (10), cut extension ontology
(11), by seal full outer cylinder sheath (2) by top connection (1), cut and hang ontology (11) and be fixedly connected, and top connection (1) and cut extension ontology
(11) it is equipped with the cavity of gate rotation between, is equipped with flashboard fixing bolt (3) in the side of top connection (1) lower end, passes through flashboard
Shaft (4) is flexibly connected circular seal carrier (8), and is equipped with seal rubber (7) in the upper surface of seal carrier (8), is used for
It is sealed with the lower end surface of top connection (1)；Flashboard is equipped in the other side of top connection (1) and opens piston group (5), and is opened in flashboard
The upside cavity of piston group (5) is communicated to the connection oil nozzle (6) on the outside of full envelope outer cylinder sheath (2), and passes through connection oil nozzle (6) and liquid
Cylinder pressure (20) connection, the lower end surface that the flashboard opens piston group (5) are contacted with seal carrier (8)；Described cuts extension ontology
(11) upside is equipped with multiple return springs (10), and the flashboard of the upper end connection circular ring shape of return spring (10) closes bracket (9),
When shut-in well, seal carrier (8) is supported on to the lower end surface of top connection (1) by flashboard closing bracket (9) and return spring (10)
Realize sealing；When well workovers, piston group (5) are opened by hydraulic-driven flashboard and are moved down, and push seal carrier (8) open, further under
Pressure rotates seal carrier (8) around flashboard shaft (4), and coiled tubing can be along under the lower going-into-well of top connection (1) inner cavity.
2. four flashboards coiled tubing blowout preventer according to claim 1, it is characterized in that: the flashboard closes bracket (9) packet
Terminal pad (9.1) and guiding axis (9.2) are included, the terminal pad (9.1) is cirque structure, solid in the downside of terminal pad (9.1)
Fixed multiple guiding axis (9.2), guiding axis (9.2) extend downwardly, and are inserted into the reserved cylindrical groove cut and hung on ontology (11),
Guiding axis (9.2) can be moved up and down along reserved cylindrical groove, when terminal pad (9.1) moves down, seal carrier (8) around
Flashboard shaft (4) rotates down.
3. four flashboards coiled tubing blowout preventer according to claim 2, it is characterized in that: the lower part of the guiding axis (9.2)
Be arranged with preformed hole, guiding axis (9.2) preformed hole and cut hang ontology (11) reserved cylinder groove between be equipped with return spring
(10).
4. four flashboards coiled tubing blowout preventer according to claim 2, it is characterized in that: being set on the outside of the guiding axis (9.2)
Resilient spring (10), return spring (10) lower end setting cut hang ontology (11) upper end, return spring (10) it is upper
The following table face contact at end and terminal pad (9.1).
5. four flashboards coiled tubing blowout preventer according to claim 1, it is characterized in that: the full envelope outer cylinder sheath (2) with it is upper
A hydraulic oil groove (21) of circle is equipped between connector (1), and the flashboard is opened and set between piston group (5) and hydraulic oil groove (21)
There is intercommunicating pore, makes the hydraulic oil of hydraulic cylinder (20) by connection oil nozzle (6), hydraulic oil groove (21) and intercommunicating pore, flashboard is pushed to open
Piston group (5) is opened to move down.
6. four flashboards coiled tubing blowout preventer according to claim 1, it is characterized in that: the flashboard opens piston group (5)
Equipped with six groups of pistons.
7. four flashboards coiled tubing blowout preventer according to claim 2, it is characterized in that: the guiding axis (9.2) is equipped with six
Root.
8. four flashboards coiled tubing blowout preventer according to claim 1, it is characterized in that: the outer diameter of the seal carrier (8)
Greater than the outer diameter of seal rubber (7), the outer diameter of the seal rubber (7) is greater than the internal diameter of top connection (1)；The seal carrier
(8) outer diameter is less than the outer diameter that flashboard closes bracket (9).
9. four flashboards coiled tubing blowout preventer according to claim 1, it is characterized in that: half seal apparatus includes outside ring seal
Cylinder sleeve (14) sets piston (15), annular half envelope (16), lower contact (17), seal cartridge (18), and ring seal top connection (22) is under
It is fixedly connected between connector (17) by ring seal outer cylinder sheath (14), is equipped with seal cartridge in the inner wall of ring seal top connection (22)
(18), it is equipped between ring seal outer cylinder sheath (14) and seal cartridge (18) and sets piston (15), connect under setting piston (15)
It is equipped with half envelope (16) of annular between head (17), is equipped with hydraulic oil nozzle (23) on the outside of ring seal outer cylinder sheath (14), passes through hydraulic-driven
It sets piston (15) to move down, so that half envelope (16) of annular is squeezed coiled tubing and realize ring seal.
10. four flashboards coiled tubing blowout preventer according to claim 9, it is characterized in that: half envelope (16) of the annular is half
Cirque structure, and middle part is equipped with groove on the outside.
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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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| 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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| CN109519143A true CN109519143A (en) | 2019-03-26 |
| CN109519143B 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983331A (en) * | 2021-03-24 | 2021-06-18 | 大庆市天德忠石油科技有限公司 | Hydraulic double-gate plate well plugging device |
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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 |
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|---|---|
| CN109519143B (en) | 2021-06-04 |
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