CN106703738A - Coiled tubing blowout preventing box - Google Patents
Coiled tubing blowout preventing box Download PDFInfo
- Publication number
- CN106703738A CN106703738A CN201710102567.3A CN201710102567A CN106703738A CN 106703738 A CN106703738 A CN 106703738A CN 201710102567 A CN201710102567 A CN 201710102567A CN 106703738 A CN106703738 A CN 106703738A
- Authority
- CN
- China
- Prior art keywords
- sealing
- coiled tubing
- packer
- glue core
- blow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention relates to a coiled tubing blowout preventing box, which comprises a pipe joint connected with a blowout preventer for testing a wellhead, wherein the upper part of the inside of the pipe joint is connected with the lower part of a sealing sleeve in a sealing way, and a sealing hydraulic cylinder is arranged above the sealing sleeve, and comprises an outer cylinder liner; a piston rod is slidably sleeved by the outer cylinder liner from bottom to top in a sealing way, and an upper oil hole is formed in the top of the outer cylinder liner; a lower oil hole is formed in the bottom of the outer cylinder liner, and the free end of the piston rod can be slidably arranged inside the sealing sleeve in a sealing and penetrating way; the bottom of the side wall of the piston rod constitutes a swing part which is circumferentially arranged in a sectioning way and is capable of opening and closing radially, and a rubber core which is circumferentially arranged in a sectioning way and can be furled to form a cylinder structure is arranged on the inner wall of the swing part; and the inner wall of the rubber core can prop against the side wall of the coiled tubing in a sealing way. The coiled tubing blowout preventing box solves the problems of complex structure and complicated rubber core replacement and the like in the prior art, and has the advantages of simple structure, convenience in maintenance and replacement of the rubber core, and good sealing performance.
Description
Technical field
The present invention relates to a kind of well mouth sealing device for continuous oil pipe operation, more particularly to a kind of coiled tubing blowout prevention
Box.
Background technology
Late period of oil field, often occurs the problem of yield reduction, typically can by the way of old street district come
Exploitation remaining oil.Using coiled tubing under-balanced drilling technology, not only rapidly slim-hole can be gone out by sidetracking, moreover it is possible to effectively protect
Shield reservoir, and then improve the development benefit of old filed.When coiled tubing under-balance drilling operation is carried out, it is necessary to use a kind of well
Mouth sealing device --- blowout prevention box, its function is similar with the rotating blowout preventer used in conventional drill rod under balance pressure drilling, but
There is difference.
Blowout prevention box is to be located at a kind of well control device in the middle of injection head and preventer group, and piston is promoted by hydraulic pressure,
Extruding glue core, coiled tubing surface is firmly wrapped in by coiled tubing glue core, is risen in coiled tubing G.I.H or artesian well
Sealing is realized when going out.During under balance pressure drilling, it and choke manifold are worked together, adjust wellhead back pressure, and well is maintained jointly
The stabilization of bottom pressure, realizes the underbalance environment sprayed when boring；When other Operating Pressures such as coiled tubing well workover are carried out, pass through
Blowout prevention box carrys out sealing wellhead, it is ensured that job safety.
Existing blowout prevention box is generally divided into common inputting type, side entering type and three kinds of side entering type of series connection.But existing blowout prevention box knot
Structure is more complicated also to have changing that glue core is cumbersome, be unable to real-time monitoring glue core, is embodied in：Changing
, it is necessary to open side door during glue core, outer liner is taken out, further take out glue core, operating process is very cumbersome；When the abrasion of glue core is tight
During weight, it is impossible to real-time monitoring, only by taking out glue core, can just be judged.
Thus, the present inventor relies on the experience and practice for being engaged in relevant industries for many years, proposes a kind of continuous oil pipe anti-blow-out box,
To overcome the defect of prior art.
The content of the invention
It is an object of the invention to provide a kind of continuous oil pipe anti-blow-out box, overcome complex structure present in prior art,
The problems such as glue core changes cumbersome, the continuous oil pipe anti-blow-out box simple structure, glue core safeguards that renewal is convenient, good seal performance.
Another object of the present invention is to provide a kind of continuous oil pipe anti-blow-out box, the continuous oil pipe anti-blow-out box can be supervised in real time
The sealing condition surveyed between glue core and coiled tubing, more virgin rubber core is safeguarded according to sealing condition, it is ensured that coiled tubing well head in time
The safety of Operating Pressure.
The object of the present invention is achieved like this, a kind of continuous oil pipe anti-blow-out box, including connects with the preventer of shaft mouth test
The pipe joint for connecing, the inside upper part of the pipe joint is connected with the lower seal of a seal sleeve, the top of the seal sleeve
Sealing fluid cylinder pressure is provided with, coiled tubing is worn by the sealing fluid cylinder pressure and the seal sleeve, the sealing fluid cylinder pressure
Including outer cylinder sheath, sealing slip from bottom to up is arranged with piston rod in the outer cylinder sheath, and the free end of the piston rod can be slided
The inside for being arranged in the seal sleeve is sealed dynamicly, and the sidewall bottom of the piston rod is constituted and circumferentially divides valve to set and energy
The swing part of radial direction folding, to be provided with circumferentially correspond on the inwall of the swing part and divides valve to set and can draw composition cylinder in
The glue core of structure, the inwall of the glue core can be sealed against on the side wall of coiled tubing.
In a better embodiment of the invention, the piston rod includes the cylindrical portion above the swing part,
The swing part at least includes that two valves can radially wobble half barrel structure of folding, the outer walls top of two half barrel structures and institute
It is hinged by connecting pin between the outer wall bottom for stating cylindrical portion, the glue core includes two and corresponding with each half barrel structure sets
The half glue core put, each half glue core is respectively arranged on the inwall of each half barrel structure.
In a better embodiment of the invention, each half glue core can be slidingly arranged at each described half respectively
On the inwall of structure, the inwall bottom of each half barrel structure is provided with and is avoided that each half glue core from each half knot
The first step portion come off vertically on structure, the inwall in the first step portion is continuous with described under the swing part rounding state
It is set in distance between the side wall of oil pipe；The inner sealing of the seal sleeve is arranged with the first packer, the coiled tubing
The inner chamber by first packer is worn, cylindrical projection portion is provided with the top center of first packer, it is described
The top end face in cylindrical projection portion can with the bottom of the glue core against.
In a better embodiment of the invention, the piston cavity for being internally provided with up/down perforation of the piston rod,
The position seals above the swing part are located in the piston cavity and are fixed with the second packer, the coiled tubing wears logical
Cross the inner chamber of second packer；The two ends of the glue core can bottom end face, institute respectively with second packer simultaneously
The top end face for stating the first packer leans.
Fixation is sealed from top to down in a better embodiment of the invention, in the outer cylinder sheath is equipped with inner casing
Set, the bottom of the inner cylinder liner can be sealed in the piston cavity being slidably arranged in above second packer, described
Fixation is equipped with fairlead in the inner chamber of inner cylinder liner, and the coiled tubing sealing wears the inner chamber by the fairlead.
In a better embodiment of the invention, the inner sealing of the seal sleeve is arranged with the first packer, institute
State coiled tubing and wear inner chamber by first packer；Being provided with the seal sleeve can monitor first packing
The first pressure table of the space pressure above set, being additionally provided with the seal sleeve can monitor below first packer
The second pressure table of space pressure.
In a better embodiment of the invention, connection is provided between the sealing fluid cylinder pressure and the seal sleeve
Support, the bottom of the connecting bracket is sheathed on the top of the seal sleeve, and the sidewall bottom sealing of the outer cylinder sheath is arranged
In the top of the connecting bracket, the free end sealing of the piston rod is worn by that can be slided behind the top of the connecting bracket
Inside upper part of the ground sealing shroud located at the seal sleeve.
In a better embodiment of the invention, the connecting bracket includes be sheathed on the seal sleeve first
Clutch disk, the connecting bracket also includes second clutch disk of the sealing shroud located at the sidewall bottom of the outer cylinder sheath, described
It is circumferentially spaced between first clutch disk and second clutch disk to be provided with multiple connection support columns.
In a better embodiment of the invention, the piston mistake of up/down perforation is provided with second clutch disk
Hole, sets second step portion on the inwall of the piston via, the top in the second step portion constitutes the cylinder sleeve of diameter increase
Connecting hole, the bottom end face of the outer cylinder sheath is sealed against with the second step portion, the sidewall bottom sealing of the outer cylinder sheath
It is sheathed in the cylinder sleeve connecting hole.
In a better embodiment of the invention, oil filler point, the outer cylinder sheath are provided with the top of the outer cylinder sheath
Bottom be provided with lower oil filler point；Described lower oiling with the inner space of the outer cylinder sheath is set on second clutch disk
Hole.
From the above mentioned, the continuous oil pipe anti-blow-out box that the present invention is provided has the advantages that：
(1) the sealed hydraulic cylinder structure in continuous oil pipe anti-blow-out box of the invention is simple, the free end sealing shroud of piston rod
When being located at seal sleeve inside, glue core is compressed and is sealed on the side wall of coiled tubing, and piston rod moves up to free end and leaves
After seal sleeve, swing part can be radially unfolded, facilitates operating personnel to complete the maintenance and replacing of glue core, simple to operate；
(2) first pressure table and second pressure table are set in continuous oil pipe anti-blow-out box of the invention, according to first pressure table
With the reading difference of second pressure table, can be with the sealing condition between real-time monitoring glue core and coiled tubing, it is ensured that coiled tubing
The security of shaft mouth operation；
(3) there is two seals defence line, the sealing between glue core and coiled tubing in continuous oil pipe anti-blow-out box of the invention
It is the first sealing defence line, the second sealing defence line is sealed between seal sleeve and piston rod, when between glue core and coiled tubing
Seal failure when, second sealing defence line can play sealing function to seal sleeve, it is to avoid close well head preventer
Flowed out in self-sealed fluid sleeve before, can well ensure safety work.
Brief description of the drawings
The following drawings is only intended to, in schematic illustration and explanation is done to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1：It is continuous oil pipe anti-blow-out box sealing state structural representation of the invention.
Fig. 2：For continuous oil pipe anti-blow-out box of the invention changes glue wick-like state structural representation.
In figure：
100th, continuous oil pipe anti-blow-out box；
1st, sealing fluid cylinder pressure；
11st, outer cylinder sheath；111st, upper oil filler point；112nd, lower oil filler point；
12nd, piston rod；
120th, piston cavity；
121st, swing part；1211st, half barrel structure；1212nd, first step portion；
122nd, cylindrical portion；
123rd, connecting pin；
13rd, inner cylinder liner；131st, the first positioning step portion；
14th, fairlead；141st, the second positioning step portion；
2nd, glue core；21st, half glue core；
3rd, the first packer；31st, cylindrical projection portion；
4th, the second packer；
5th, connecting bracket；
51st, the first clutch disk；
52nd, the second clutch disk；
521st, piston via；5211st, second step portion；
522nd, cylinder sleeve connecting hole；
53rd, support column is connected；
54th, fixing nut；
61st, first pressure table；
62nd, second pressure table；
7th, seal sleeve；
8th, pipe joint；
9th, coiled tubing.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, now control illustrates this hair
Bright specific embodiment.
As shown in Figure 1 and Figure 2, the present invention provides a kind of continuous oil pipe anti-blow-out box 100, including the preventer with shaft mouth test
The pipe joint 8 of (prior art) connection, continuous oil pipe anti-blow-out box 100 is installed on the top of preventer by pipe joint 8, plays close
Envelope blowout prevention effect；The inside upper part of pipe joint 8 is connected with the lower seal of a seal sleeve 7, in the present embodiment, sealing shroud
Cylinder 7 and pipe joint 8 are connected by screw, and set sealing ring between seal sleeve 7 and pipe joint 8；The top of seal sleeve 7 sets
Sealing fluid cylinder pressure 1 is equipped with, sealing fluid cylinder pressure 1 includes that sealing slip from bottom to up is arranged with work in outer cylinder sheath 11, outer cylinder sheath 11
Stopper rod 12, the top of outer cylinder sheath 11 is provided with oil filler point 111, and the bottom of outer cylinder sheath is provided with lower oil filler point 112, in this implementation
In mode, filling pump (prior art), to the rodless cavity oiling of sealing fluid cylinder pressure 1, realizes piston rod 12 by upper oil filler point 111
Move down, filling pump (prior art), to the rod chamber oiling of sealing fluid cylinder pressure 1, realizes piston rod 12 by lower oil filler point 112
Upper shifting；The free end of piston rod 12 can slidably seal the inside for being arranged in seal sleeve 7, the sidewall bottom structure of piston rod 12
Into the swing part 121 for circumferentially dividing valve setting and energy radial direction folding, it is provided with circumferentially to correspond on the inwall of swing part 121 and divides
Valve sets and can draw in glue core 2 (point valve facilities of glue core 2 and point valve situation phase of swing part 121 for constituting cylindrical structure
Correspondence), the inwall of glue core 2 can be sealed against on the side wall of coiled tubing 9.In continuous oil pipe anti-blow-out box of the invention 100
The simple structure of sealing fluid cylinder pressure 1, when the free end sealing of piston rod 12 is set in 7 inside of seal sleeve, glue core 2 is compressed and is sealed in
On the side wall of coiled tubing 9, piston rod 12 is moved up to after free end leaves seal sleeve 7, and swing part 121 can radially be beaten
Open, facilitate operating personnel to complete the maintenance and replacing of glue core 2, it is simple to operate.Have in continuous oil pipe anti-blow-out box of the invention 100
Two seals defence line, is sealed into the first sealing defence line, between seal sleeve 7 and piston rod 12 between glue core 2 and coiled tubing 9
Be sealed into the second sealing defence line, when the seal failure between glue core 2 and coiled tubing 9, second sealing defence line can be right
Seal sleeve 7 plays sealing function, it is to avoid flowed out in self-sealed fluid sleeve before closing the preventer of shaft mouth test, can be very
Ensure safety work well.
Further, as shown in Figure 1 and Figure 2, piston rod 12 includes the cylindrical portion 122 positioned at the top of swing part 121, swing part
121 at least include that two valves can radially wobble half barrel structure 1211 of folding, the outer wall top of two and half barrel structures 1211 and cylinder
It is hinged by connecting pin 123 between the outer wall bottom in portion 122, glue core 2 is correspondingly arranged including two with half and half barrel structure 1211
Half glue core 21, half and half glue core 21 is respectively arranged on the inwall of half and half barrel structure 1211.When needing to change glue core 2,
It is moved from being extracted out in seal sleeve 7 on piston rod 12, radially outward the barrel structure 1211 of swing open two and half, from its internal taking-up half
Cylinder glue core 21, after being put into half new glue core 21, radially-inwardly swings and closes up two and half barrel structures 1211, and new glue core 2 is again
It is sealed against on the side wall of coiled tubing 9.
Further, as shown in Figure 1 and Figure 2, half and half glue core 21 can be slidingly arranged at the interior of half and half barrel structure 1211 respectively
On wall, the inwall bottom of half and half barrel structure 1211 is provided with and is avoided that half and half glue core 21 from half and half barrel structure 1211 vertically
The first step portion 1212 for coming off, for convenience coiled tubing 9 wear, under the rounding state of swing part 121, first step portion
It is set in distance between 1212 inwall and the side wall of coiled tubing 9；The inner sealing of seal sleeve 7 is arranged with the first packer
3, in the present embodiment, the first packer 3 is connected through a screw thread the inside for being fixed on seal sleeve 7, and the first packer 3 with
Sealing ring is provided between the inwall of seal sleeve 7；Cylindrical projection portion 31 is provided with the top center of the first packer 3, circle
The top end face of post lug boss 31 can with the sealed bottom of glue core 2 against.Cylindrical projection portion 31 can make the first packer 3 more preferable
Ground compresses axially glue core 2, it is preferably sealed holding coiled tubing 9.
Further, as shown in Figure 1 and Figure 2, the piston cavity 120 for being internally provided with up/down perforation of piston rod 12, in piston
The position seals that the top of swing part 121 is located in chamber 120 are fixed with the second packer 4, in the present embodiment, the second packer
4 are connected through a screw thread and are fixed in piston cavity 120；Coiled tubing 9 wears the inner chamber by the second packer 4；Piston rod 12
When sealing is set in seal sleeve 7 and slides into axial extreme lower position, the two ends of glue core 2 can insulate with second respectively simultaneously
The bottom end face of set 4, the top end face of the first packer 3 are mutually sealed against, and now, the first packer 3 and the second packer 4 are same
When axial compression glue core 2 so that glue core 2 deforms to radially inner side, hold coiled tubing 9 tightly, and two ends to glue core 2 are entered
Row is sealed against so that the sealing effectiveness between glue core 2 and coiled tubing 9 is more preferable.
Further, as shown in Figure 1 and Figure 2, fixation is sealed in outer cylinder sheath 11 from top to down and is equipped with inner cylinder liner 13, at this
In implementation method, inner cylinder liner 13 is connected with outer cylinder sheath 11 by thread seal, in order to preferably seal, outer cylinder sheath 11 and inner cylinder liner
Sealing ring is provided between 13；The bottom of inner cylinder liner 13 can seal the piston cavity for being slidably arranged in the top of the second packer 4
In 120, fixation is equipped with fairlead 14 in the inner chamber of inner cylinder liner 13, and coiled tubing 9 seals the inner chamber worn by fairlead 14.
In the present embodiment, the top of inner cylinder liner 13 is provided with the first positioning step portion 131, and the top of fairlead 14 is provided with second
Positioning step portion 141, the bottom end face in the first positioning step portion 131 is resisted against on the top end face of outer cylinder sheath 11, the second positioning
The bottom end face of stage portion 141 is resisted against on the top end face in the first positioning step portion 131, realizes inner cylinder liner 13, fairlead
14 axially position.
Further, as shown in Figure 1 and Figure 2, coiled tubing 9 wears the inner chamber by the first packer 3；Set on seal sleeve 7
The first pressure table 61 of the space pressure that can monitor the top of the first packer 3 is equipped with, on the packer 3 of first pressure table 61 and first
The space of side is connected, and the second pressure table of the space pressure that can monitor the lower section of the first packer 3 is additionally provided with seal sleeve 7
62, second pressure table 62 is connected with the space of the lower section of the first packer 3.During 100 normal work of continuous oil pipe anti-blow-out box, piston
The swing part 121 of bar 12 is drawn in so that the inner wall sealing of glue core 2 is resisted against on the side wall of coiled tubing 9, the freedom of piston rod 12
End can slidably seal the inside for being arranged in seal sleeve 7, and second pressure table 62 surveys the sky that data are the lower section of the first packer 3
Between pressure be borehole fluid pressure, it is between the first packer 3 and the free end of piston rod 12 that first pressure table 61 surveys data
Space pressure, the general space pressure set between the first packer 3 and the free end of piston rod 12 is an atmospheric pressure, when
When sealing condition between glue core 2 and coiled tubing 9 is good, second pressure table 62 surveys data and first pressure table 61 surveys number
According to variant, and difference is obvious；When seal failure between the serious wear of glue core 2, i.e. glue core 2 and coiled tubing 9, stream in well
Know from experience and the gap between glue core 2 and coiled tubing 9 is entered by the gap between the first packer 3 and coiled tubing 9, part is flowed
Know from experience sealing against into the first packer 3 and piston rod 12 between the bottom and the top of the first packer 3 of breakthrough glue core 2
Free end between space, now second pressure table 62 survey data and first pressure table 61 and survey that data are identical or basic phase
With (difference is little), sealing situation that accordingly can be between real-time monitoring glue core 2 and coiled tubing 9, it is ensured that the well head of coiled tubing 9 is made
The security of industry.
Further, as shown in Figure 1 and Figure 2, connecting bracket 5, connection branch are provided between sealing fluid cylinder pressure 1 and seal sleeve 7
The bottom of frame 5 is sheathed on the top of seal sleeve 7, and the sidewall bottom sealing shroud of outer cylinder sheath 11 is living located at the top of connecting bracket 5
Stopper rod 12 free end sealing wear by behind the top of connecting bracket 5 can slidably sealing shroud located at seal sleeve 7 inner side
Top.Connecting bracket 5 ensures that sealing fluid cylinder pressure 1 is set up in the top of seal sleeve 7, and connecting bracket 5 top and bottom it
Between distance ensure that the self sealss sleeve 7 of piston rod 12 in detach, it is ensured that the replacing space of enough glue cores 2.
Further, as shown in Figure 1 and Figure 2, connecting bracket 5 includes the first clutch disk 51 being sheathed on seal sleeve 7,
In the present embodiment, the first clutch disk 51 is connected through a screw thread and is fixed on seal sleeve 7；Connecting bracket 5 also includes close
Big envelope is located at the second clutch disk 52 of the sidewall bottom of outer cylinder sheath 11, between the first clutch disk 51 and the second clutch disk 52
It is circumferentially spaced to be provided with multiple connection support columns 53.In the present embodiment, the bottom of connection support column 53 is fixed on first
On clutch disk 51, in a specific embodiment of the invention, support column fixing threaded hole, connection are set on the first clutch disk 51
The bottom of support column 53 is connected through a screw thread to be fixed on the first clutch disk 51；Set on second clutch disk 52 and connected
Hole, the side wall upper part for connecting support column 53 sets the 3rd stage portion, on the side wall of connection support column 53, positioned at the 3rd stage portion
Top sets connection screw thread, and the top of connection support column 53 wears to be fixed after connecting via by fixing nut 54, now,
3rd stage portion leans with the bottom end face of the second clutch disk 52, realizes the axially position of the second clutch disk 52.
Further, as shown in Figure 1 and Figure 2, the piston via 521 of up/down perforation, piston are provided with the second clutch disk 52
Second step portion 5211 is set on the inwall of via 521, and the top in second step portion 5211 constitutes the cylinder sleeve connection of diameter increase
Hole 522, bottom end face and the second step portion 5211 of outer cylinder sheath 11 are sealed against, and the sidewall bottom sealing shroud of outer cylinder sheath 11 is located at
In cylinder sleeve connecting hole 522.Second clutch disk 52 constitutes the sealed bottom end of outer cylinder sheath 11.
Further, as shown in Figure 1 and Figure 2, the lower oiling with the inner space of outer cylinder sheath 11 is set on second clutch disk 52
Hole 112.
When carrying out shaft mouth test using continuous oil pipe anti-blow-out box of the invention 100 and sealing, by pipe joint 8 by coiled tubing
Blowout prevention box 100 is sealedly attached on the preventer of shaft mouth test, and the swing part 121 of piston rod 12 draws in and is sealed against glue core 2
In on the side wall of coiled tubing 9, oiling in rodless cavity of the filling pump through upper oil filler point 111 to sealing fluid cylinder pressure 1 promotes piston rod
12 move down, and the free end sealing shroud of piston rod 12 realizes the sealing of shaft mouth test, such as Fig. 1 institutes located at the inner side of seal sleeve 7
Show.Now, open preventer, sealing condition between glue core 2 and coiled tubing 9 is good, second pressure table 62 surveys data with
First pressure table 61 surveys data and there is notable difference.
When glue 2 serious wear of core, the seal failure between glue core 2 and coiled tubing 9, borehole fluid by glue core 2 with
Gap between coiled tubing 9 enters the space between the first packer 3 and the free end of piston rod 12, now second pressure table
62 survey data and first pressure table 61, and to survey data identical or essentially identical (difference is little), now needs to change glue core 2.More
Before changing, the preventer of shaft mouth test is first shut off, then in rod chamber of the filling pump through lower oil filler point 112 to sealing fluid cylinder pressure 1
Oiling, promotes and moved on piston rod 12, is extracted out in the free end self sealss sleeve 7 of piston rod 12, radially outward swing open two
Half barrel structure 1211, as shown in Fig. 2 from its half glue core 21 of internal taking-up, after being put into half new glue core 21, radially-inwardly putting
Dynamic circuit connector holds together two and half barrel structures 1211, and new glue core 2 is resealed and is resisted against on the side wall of coiled tubing 9.Repeat aforementioned activities,
The free end sealing shroud of piston rod 12 realizes the sealing of shaft mouth test in seal sleeve 7.
From the above mentioned, the continuous oil pipe anti-blow-out box that the present invention is provided has the advantages that：
(1) the sealed hydraulic cylinder structure in continuous oil pipe anti-blow-out box of the invention is simple, the free end sealing shroud of piston rod
When being located at seal sleeve inside, glue core is compressed and is sealed on the side wall of coiled tubing, and piston rod moves up to free end and leaves
After seal sleeve, swing part can be radially unfolded, facilitates operating personnel to complete the maintenance and replacing of glue core, simple to operate；
(2) first pressure table and second pressure table are set in continuous oil pipe anti-blow-out box of the invention, according to first pressure table
With the reading difference of second pressure table, can be with the sealing condition between real-time monitoring glue core and coiled tubing, it is ensured that coiled tubing
The security of shaft mouth operation；
(3) there is two seals defence line, the sealing between glue core and coiled tubing in continuous oil pipe anti-blow-out box of the invention
It is the first sealing defence line, the second sealing defence line is sealed between seal sleeve and piston rod, when between glue core and coiled tubing
Seal failure when, second sealing defence line can play sealing function to seal sleeve, it is to avoid close well head preventer
Flowed out in self-sealed fluid sleeve before, can well ensure safety work.
Schematical specific embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.It is any
Those skilled in the art, done equivalent variations and modification on the premise of design of the invention and principle is not departed from,
The scope of protection of the invention should be belonged to.
Claims (10)
1. a kind of continuous oil pipe anti-blow-out box, including the pipe joint being connected with the preventer of shaft mouth test, the inner side of the pipe joint
Top is connected with the lower seal of a seal sleeve, and sealing fluid cylinder pressure is provided with above the seal sleeve, and coiled tubing is worn
If passing through the sealing fluid cylinder pressure and the seal sleeve, it is characterised in that the sealing fluid cylinder pressure includes outer cylinder sheath, described outer
Sealing slip from bottom to up is arranged with piston rod in cylinder sleeve, the free end of the piston rod can slidably seal be arranged in it is described
The inside of seal sleeve, the sidewall bottom of the piston rod constitutes the swing part for circumferentially dividing valve setting and energy radial direction folding, institute
State to be provided with the inwall of swing part and circumferentially correspond to the glue core that point valve sets and can draw composition cylindrical structure in, the glue core
Inwall can be sealed against on the side wall of coiled tubing.
2. continuous oil pipe anti-blow-out box as claimed in claim 1, it is characterised in that the piston rod includes being located at the swing part
The cylindrical portion of top, the swing part at least includes that two valves can radially wobble half barrel structure of folding, two half barrel structures
Outer wall top and the outer wall bottom of the cylindrical portion between be hinged by connecting pin, the glue core include two it is described with each
Half glue core that half barrel structure is correspondingly arranged, each half glue core is respectively arranged on the inwall of each half barrel structure.
3. continuous oil pipe anti-blow-out box as claimed in claim 2, it is characterised in that each half glue core can slidably set respectively
It is placed on the inwall of each half barrel structure, the inwall bottom of each half barrel structure is provided with and is avoided that each half glue core
The first step portion come off vertically from each half barrel structure, the first step portion under the swing part rounding state
It is set in distance between inwall and the side wall of the coiled tubing；The inner sealing of the seal sleeve is arranged with the first packing
Set, the coiled tubing wears the inner chamber by first packer, is provided with the top center of first packer
Cylindrical projection portion, the top end face in the cylindrical projection portion can with the sealed bottom of the glue core against.
4. continuous oil pipe anti-blow-out box as claimed in claim 3, it is characterised in that being internally provided with for the piston rod is passed through up and down
Logical piston cavity, is located at the position seals above the swing part and is fixed with the second packer in the piston cavity, described
Coiled tubing wears the inner chamber by second packer；The two ends of the glue core can simultaneously respectively with second packer
Bottom end face, the top end face of first packer is mutually sealed against.
5. continuous oil pipe anti-blow-out box as claimed in claim 4, it is characterised in that sealed from top to down in the outer cylinder sheath solid
Surely inner cylinder liner is equipped with, the bottom of the inner cylinder liner can seal the piston being slidably arranged in above second packer
In inner chamber, fixation is equipped with fairlead in the inner chamber of the inner cylinder liner, and the coiled tubing sealing is worn by the fairlead
Inner chamber.
6. continuous oil pipe anti-blow-out box as claimed in claim 1, it is characterised in that the inner sealing of the seal sleeve is arranged with
First packer, the coiled tubing wears the inner chamber by first packer；Being provided with the seal sleeve to supervise
The first pressure table of the space pressure above first packer is controlled, being additionally provided with the seal sleeve can monitor described
The second pressure table of the space pressure below one packer.
7. continuous oil pipe anti-blow-out box as claimed in claim 1, it is characterised in that the sealing fluid cylinder pressure and the seal sleeve
Between be provided with connecting bracket, the bottom of the connecting bracket is sheathed on the top of the seal sleeve, the side of the outer cylinder sheath
Wall sealed bottom is sheathed on the top of the connecting bracket, and the free end sealing of the piston rod is worn by the connecting bracket
Top after can slidably sealing shroud located at the seal sleeve inside upper part.
8. continuous oil pipe anti-blow-out box as claimed in claim 7, it is characterised in that the connecting bracket includes being sheathed on described close
The first clutch disk on big envelope cylinder, the connecting bracket also includes sealing shroud located at the second of the sidewall bottom of the outer cylinder sheath
Clutch disk, it is circumferentially spaced between first clutch disk and second clutch disk to be provided with multiple connection supports
Post.
9. continuous oil pipe anti-blow-out box as claimed in claim 8, it is characterised in that be provided with second clutch disk up and down
The piston via of insertion, sets second step portion on the inwall of the piston via, the top in the second step portion is constituted directly
The cylinder sleeve connecting hole of footpath increase, the bottom end face of the outer cylinder sheath is sealed against with the second step portion, the outer cylinder sheath
Sidewall bottom sealing shroud is in the cylinder sleeve connecting hole.
10. continuous oil pipe anti-blow-out box as claimed in claim 8, it is characterised in that be provided with note at the top of the outer cylinder sheath
Oilhole, the bottom of the outer cylinder sheath is provided with lower oil filler point；Inner chamber with the outer cylinder sheath is set on second clutch disk
The described lower oil filler point of connection.
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| CN201710102567.3A CN106703738B (en) | 2017-02-24 | 2017-02-24 | Continuous oil pipe anti-blow-out box |
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| CN201710102567.3A CN106703738B (en) | 2017-02-24 | 2017-02-24 | Continuous oil pipe anti-blow-out box |
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| CN106703738A true CN106703738A (en) | 2017-05-24 |
| CN106703738B CN106703738B (en) | 2018-02-06 |
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| CN201710102567.3A Active CN106703738B (en) | 2017-02-24 | 2017-02-24 | Continuous oil pipe anti-blow-out box |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109083617A (en) * | 2017-12-06 | 2018-12-25 | 绵阳固美科技有限公司 | Underground end hydraulic selector |
| CN110725662A (en) * | 2017-12-01 | 2020-01-24 | 王鲁洋 | Device for petroleum industry |
| CN112065317A (en) * | 2020-09-30 | 2020-12-11 | 中国石油天然气集团有限公司 | Coiled tubing wellhead blowout preventer and use method thereof |
| CN112177557A (en) * | 2020-11-25 | 2021-01-05 | 西南石油大学 | Remote automatic core changing and sealing real-time monitoring continuous pipe blowout prevention box |
| CN112012687B (en) * | 2020-10-27 | 2021-01-22 | 山东威盟石油机械有限公司 | Efficient blowout prevention box for coiled tubing |
| CN112593891A (en) * | 2020-12-28 | 2021-04-02 | 雅安万利橡塑密封技术有限责任公司 | Blowout prevention box rubber core sealing assembly |
| CN113236185A (en) * | 2021-05-24 | 2021-08-10 | 中海油田服务股份有限公司 | High-temperature-resistant heat-insulation blowout preventer |
| CN113236184A (en) * | 2021-05-24 | 2021-08-10 | 中海油田服务股份有限公司 | High-temperature wellhead heat insulation system |
| CN114427364A (en) * | 2021-12-24 | 2022-05-03 | 中煤科工集团西安研究院有限公司 | Sealing device and sealed coring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112065317B (en) * | 2020-09-30 | 2024-03-01 | 中国石油天然气集团有限公司 | Coiled tubing wellhead blowout preventer and use method thereof |
| CN112012687B (en) * | 2020-10-27 | 2021-01-22 | 山东威盟石油机械有限公司 | Efficient blowout prevention box for coiled tubing |
| CN112177557A (en) * | 2020-11-25 | 2021-01-05 | 西南石油大学 | Remote automatic core changing and sealing real-time monitoring continuous pipe blowout prevention box |
| CN112177557B (en) * | 2020-11-25 | 2021-06-08 | 西南石油大学 | Remote automatic core changing and sealing real-time monitoring continuous pipe blowout prevention box |
| CN112593891A (en) * | 2020-12-28 | 2021-04-02 | 雅安万利橡塑密封技术有限责任公司 | Blowout prevention box rubber core sealing assembly |
| CN113236185A (en) * | 2021-05-24 | 2021-08-10 | 中海油田服务股份有限公司 | High-temperature-resistant heat-insulation blowout preventer |
| CN113236184A (en) * | 2021-05-24 | 2021-08-10 | 中海油田服务股份有限公司 | High-temperature wellhead heat insulation system |
| CN114427364A (en) * | 2021-12-24 | 2022-05-03 | 中煤科工集团西安研究院有限公司 | Sealing device and sealed coring system |
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