CN106703738B - Continuous oil pipe anti-blow-out box - Google Patents
Continuous oil pipe anti-blow-out box Download PDFInfo
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- CN106703738B CN106703738B CN201710102567.3A CN201710102567A CN106703738B CN 106703738 B CN106703738 B CN 106703738B CN 201710102567 A CN201710102567 A CN 201710102567A CN 106703738 B CN106703738 B CN 106703738B
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- Prior art keywords
- glue core
- blow
- sealing
- packer
- oil pipe
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- 239000003292 glue Substances 0.000 claims abstract description 86
- 238000007789 sealing Methods 0.000 claims abstract description 85
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 241000283216 Phocidae Species 0.000 description 69
- 230000002265 prevention Effects 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010027336 Menstruation delayed Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- 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)
- Geophysics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention is a kind of continuous oil pipe anti-blow-out box, the pipe joint being connected including the preventer with shaft mouth test, the inside upper part of pipe joint is connected with the lower seal of a seal sleeve, sealing fluid cylinder pressure is provided with above seal sleeve, sealing fluid cylinder pressure includes outer cylinder sheath, slip cap is sealed in outer cylinder sheath from bottom to up and is provided with piston rod, oil filler point is provided with the top of outer cylinder sheath, the bottom of outer cylinder sheath is provided with lower oil filler point, the free end of piston rod can slidably seal the inside for being arranged in seal sleeve, the sidewall bottom of piston rod, which is formed, circumferentially divides valve to set, and the swing part of energy radial direction folding, being provided with the inwall of swing part circumferentially divides valve to set, and the glue core for forming cylindrical structure can be collapsed, the inwall of glue core can be sealed against in the side wall of coiled tubing.The continuous oil pipe anti-blow-out box overcomes complicated, glue core present in prior art to change the problems such as cumbersome, simple in construction, and glue core safeguards that renewal is convenient, good seal 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, the problem of yield reduction often occurs, typically can by the way of old street district come
Exploit 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
Reservoir is protected, and then improves the development benefit of old filed.When carrying out coiled tubing under-balance drilling operation, 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 a kind of well control device among injection head and preventer group, and piston is promoted by hydraulic pressure,
Glue core is extruded, coiled tubing glue core is firmly wrapped in coiled tubing surface, 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 work together, adjust wellhead back pressure, maintain well jointly
The stabilization of bottom pressure, realize the underbalance environment sprayed when boring;When carrying out other Operating Pressures such as coiled tubing well workover, pass through
Blowout prevention box carrys out sealing wellhead, ensures 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 be existed and changes that glue core is cumbersome, can not monitor the problems such as glue core wear condition in real time, is embodied in:Changing
, it is necessary to open side door during glue core, outer liner is taken out, further takes out glue core, operating process is very cumbersome;When the abrasion of glue core is tight
During weight, it is impossible to monitoring in real time, only by taking out glue core, could be judged.
Thus, the present inventor relies on experience and the practice for being engaged in relevant industries for many years, proposes a kind of continuous oil pipe anti-blow-out box,
The defects of to overcome 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 present in prior art it is complicated,
Glue core changes the problems such as cumbersome, and the continuous oil pipe anti-blow-out box is simple in construction, and 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 supervise in real time
The sealing condition surveyed between glue core and coiled tubing, safeguard more virgin rubber core in time according to sealing condition, ensure coiled tubing well head
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 connect, the inside upper part of the pipe joint are 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
Seal slip cap from bottom to up including outer cylinder sheath, in the outer cylinder sheath and be provided with piston rod, 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, which is formed, circumferentially divides valve setting and energy
The swing part of radial direction folding, it is provided with the inwall of the swing part circumferentially to correspond to and divides valve to set and can collapse composition cylinder
The glue core of structure, the inwall of the glue core can be sealed against in the side wall of coiled tubing.
In the better embodiment of the present invention, the piston rod includes the cylindrical portion above the swing part,
The swing part, which comprises at least two valves, can radially wobble half barrel structure of folding, at the top of the outer wall of two half barrel structures and institute
State and be hinged by connecting pin between the outer wall bottom of cylindrical portion, the glue core includes two and corresponding with each half barrel structure set
The half glue core put, each half glue core are respectively arranged on the inwall of each half barrel structure.
In the better embodiment of the present 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, which is provided with, is avoided that each half glue core from each half knot
The first step portion to be come off vertically on structure, under the swing part rounding state inwall in the first step portion with it is described continuous
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 the better embodiment of the present invention, the piston cavity for being internally provided with up/down perforation of the piston rod,
Position seals in the piston cavity above the swing part are fixed with the second packer, and the coiled tubing wears logical
Cross the inner chamber of second packer;The both ends of the glue core can the bottom end face with second packer, institute respectively simultaneously
The top end face for stating the first packer leans.
In the better embodiment of the present invention, sealing fixation is equipped with inner casing from top to down in the outer cylinder sheath
Set, the bottom of the inner cylinder liner can be sealed in the piston cavity being slidably arranged in above second packer, described
Fixed in the inner chamber of inner cylinder liner to be equipped with guide sleeve, the coiled tubing sealing wears the inner chamber by the guide sleeve.
In the better embodiment of the present 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;First packing can be monitored by being provided with the seal sleeve
The first pressure table of the space pressure of top is covered, being additionally provided with the seal sleeve can monitor below first packer
The second pressure gauge of space pressure.
In the better embodiment of the present invention, connection is provided between the sealing fluid cylinder pressure and the seal sleeve
Support, the bottom of the connecting bracket are 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 sealing of the free end of the piston rod can be slided after wearing the top by the connecting bracket
Ground sealing shroud is located at the inside upper part of the seal sleeve.
In the better embodiment of the present invention, the connecting bracket includes first be sheathed on the seal sleeve
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 the better embodiment of the present invention, the piston mistake of up/down perforation is provided with second clutch disk
Hole, second step portion is set on the inwall of the piston via, and the top in the second step portion forms the cylinder sleeve of diameter increase
Connecting hole, the bottom end face of the outer cylinder sheath are 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 the better embodiment of the present 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;The lower oiling connected with the inner chamber of the outer cylinder sheath is set on second clutch disk
Hole.
From the above mentioned, continuous oil pipe anti-blow-out box provided by the invention 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 inside seal sleeve, glue core is compressed and is sealed in the side wall of coiled tubing, and piston rod moves up to free end and left
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 gauge 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 gauge, the sealing condition between glue core and coiled tubing can be monitored in real time, ensure 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
For 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, avoid close well head preventer
Flowed out before in self-sealed fluid sleeve, safety work can be ensured well.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein:
Fig. 1:For the continuous oil pipe anti-blow-out box sealing state structural representation of the present invention.
Fig. 2:Glue wick-like state structural representation is changed for the continuous oil pipe anti-blow-out box of the present invention.
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, guide sleeve;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 gauge;
7th, seal sleeve;
8th, pipe joint;
9th, coiled tubing.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now control illustrates this hair
Bright 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 are installed on the top of preventer by pipe joint 8, played close
Seal 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 is set
Sealing fluid cylinder pressure 1 is equipped with, sealing fluid cylinder pressure 1 includes outer cylinder sheath 11, seals slip cap in outer cylinder sheath 11 from bottom to up and is provided with work
Stopper rod 12, the top of outer cylinder sheath 11 are 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) realizes piston rod 12 by rodless cavity oiling of the upper oil filler point 111 to sealing fluid cylinder pressure 1
Move down, filling pump (prior art) realizes piston rod 12 by rod chamber oiling of the lower oil filler point 112 to sealing fluid cylinder pressure 1
Move up;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 set and can collapse composition cylindrical structure glue core 2 (glue core 2 divide valve facilities and swing part 121 divide valve situation phase
It is corresponding), the inwall of glue core 2 can be sealed against in the side wall of coiled tubing 9.In the continuous oil pipe anti-blow-out box 100 of the present invention
Sealing fluid cylinder pressure 1 is simple in construction, and 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
In 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 the continuous oil pipe anti-blow-out box 100 of the present invention
Two seals defence line, the first sealing defence line is sealed between glue core 2 and coiled tubing 9, between seal sleeve 7 and piston rod 12
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, avoids flowing 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, which comprise at least two valves, can radially wobble half barrel structure 1211 of folding, the outer wall top of two and half barrel structures 1211 and cylinder
Be 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,
Piston rod 12 moves up to be extracted out in self sealss sleeve 7, 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 swing and close up two and half barrel structures 1211, new glue core 2 is again
It is sealed against in 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, which is provided with, is avoided that half and half glue core 21 from half and half barrel structure 1211 vertically
The first step portion 1212 to come off, in order to facilitate wearing for coiled tubing 9, 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 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 axial compression glue core 2, makes it preferably seal and holds coiled tubing 9 tightly.
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
Position seals in chamber 120 positioned at the top of swing part 121 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 both 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 compress axially glue core 2 so that glue core 2 deforms to radially inner side, hold coiled tubing 9 tightly, and the both ends of glue core 2 are entered
Row seals 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, sealing fixation is equipped with inner cylinder liner 13 from top to down in outer cylinder sheath 11, at this
In embodiment, 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, fixed in the inner chamber of inner cylinder liner 13 to be equipped with guide sleeve 14, coiled tubing 9 seals the inner chamber worn by guide sleeve 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 guide sleeve 14 is provided with second
Positioning step portion 141, the bottom end face in the first positioning step portion 131 are 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, guide sleeve
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 above the first packer 3 can be monitored by being equipped with, on the packer 3 of first pressure table 61 and first
The space of side is connected, and the second pressure gauge for the space pressure that can monitor the lower section of the first packer 3 is additionally provided with seal sleeve 7
62, second pressure gauge 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 collapsed so that the inner wall sealing of glue core 2 is resisted against in 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 gauge 62 surveys sky of the data for the lower section of the first packer 3
Between pressure be borehole fluid pressure, first pressure table 61 surveys data between the first packer 3 and the free end of piston rod 12
Space pressure, the general space pressure set between the first packer 3 and the free end of piston rod 12 as an atmospheric pressure, when
When sealing condition between glue core 2 and coiled tubing 9 is good, second pressure gauge 62 surveys data and first pressure table 61 surveys number
According to variant, and difference is obvious;When the serious wear of glue core 2, i.e., during seal failure between glue core 2 and coiled tubing 9, flowed 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 and break through sealing against into the first packer 3 and piston rod 12 between the bottom of glue core 2 and the top of the first packer 3
Free end between space, now second pressure gauge 62 survey data and first pressure table 61 and survey that data are identical or basic phase
With (difference is little), the sealing situation between glue core 2 and coiled tubing 9 can be monitored in real time accordingly, ensure 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 located at the top of connecting bracket 5, living
The free end sealing of stopper rod 12, which is worn behind the top by connecting bracket 5, to be slidably located at the inner side of seal sleeve 7 by sealing shroud
Top.Connecting bracket 5 ensures that sealing fluid cylinder pressure 1 is set up in the top of seal sleeve 7, and the top and bottom of connecting bracket 5 it
Between distance can ensure to detach in the self sealss sleeve 7 of piston rod 12, ensure 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, which is connected through a screw thread, 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 for connecting support column 53 is fixed on first
On clutch disk 51, in the specific embodiment of the present invention, support column fixing threaded hole, connection are set on the first clutch disk 51
The bottom of support column 53, which is connected through a screw thread, to be fixed on the first clutch disk 51;Set and connected on second clutch disk 52
Hole, the side wall upper part of connection support column 53 set the 3rd stage portion, connected in the side wall of support column 53, positioned at the 3rd stage portion
Top sets connection screw thread, and the top of connection support column 53 is worn to be fixed after via by connecting by fixing nut 54, now,
3rd stage portion and the bottom end face of the second clutch disk 52 lean, and realize 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 forms 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 forms the sealed bottom end of outer cylinder sheath 11.
Further, as shown in Figure 1 and Figure 2, the lower oiling connected with the inner chamber of outer cylinder sheath 11 is set on the second clutch disk 52
Hole 112.
When carrying out shaft mouth test sealing using the continuous oil pipe anti-blow-out box 100 of the present invention, 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, which collapses, is sealed against glue core 2
In in the side wall of coiled tubing 9, filling pump promotes piston rod through the upper oiling into the rodless cavity of sealing fluid cylinder pressure 1 of oil filler point 111
12 move down, and the free end sealing shroud of piston rod 12 is located at the inner side of seal sleeve 7, the sealing of shaft mouth test is realized, such as Fig. 1 institutes
Show.Now, open preventer, the sealing condition between glue core 2 and coiled tubing 9 is good, second pressure gauge 62 surveys data with
First pressure table 61 surveys data and notable difference be present.
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 gauge
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, be first shut off the preventer of shaft mouth test, then filling pump through lower oil filler point 112 into the rod chamber of sealing fluid cylinder pressure 1
Oiling, promote piston rod 12 to move up, 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 put
Dynamic circuit connector holds together two and half barrel structures 1211, and new glue core 2, which reseals, to be resisted against in 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, continuous oil pipe anti-blow-out box provided by the invention 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 inside seal sleeve, glue core is compressed and is sealed in the side wall of coiled tubing, and piston rod moves up to free end and left
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 gauge 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 gauge, the sealing condition between glue core and coiled tubing can be monitored in real time, ensure 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
For 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, avoid close well head preventer
Flowed out before in self-sealed fluid sleeve, safety work can be ensured well.
The schematical embodiment of the present invention is the foregoing is only, is not limited to the scope of the present invention.It is any
Those skilled in the art, made equivalent variations and modification on the premise of the design of the present 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 pass 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
Slip cap is sealed in cylinder sleeve from bottom to up and is provided with piston rod, 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 form the swing part for circumferentially dividing valve setting and energy radial direction folding, institute
State the glue core for being provided with the inwall of swing part and circumferentially corresponding to and dividing valve to set and composition cylindrical structure can be collapsed, the glue core
Inwall can be sealed against in 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, which comprises at least two valves, can radially wobble half barrel structure of folding, two half barrel structures
Outer wall at the top of and the outer wall bottom of the cylindrical portion between be hinged by connecting pin, the glue core include two with it is each described
Half glue core that half barrel structure is correspondingly arranged, each half glue core are 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 be set respectively
It is placed on the inwall of each half barrel structure, the inwall bottom of each half barrel structure, which is provided with, is avoided that each half glue core
The first step portion to be come off vertically from each half barrel structure, the first step portion under the swing part rounding state
It is set in distance between the side wall of inwall and the coiled tubing;The inner sealing of the seal sleeve is arranged with the first packing
Set, the coiled tubing wear the inner chamber by first packer, are 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, the position seals in the piston cavity above the swing part are fixed with the second packer, described
Coiled tubing wears the inner chamber by second packer;The both 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 sealing is solid from top to down in the outer cylinder sheath
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, fixed in the inner chamber of the inner cylinder liner to be equipped with guide sleeve, the coiled tubing sealing is worn by the guide sleeve
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 wear 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, described can be monitored by being additionally provided with the seal sleeve
The second pressure gauge of 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 be 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 is described close including being sheathed on
The first clutch disk on big envelope cylinder, the connecting bracket also include 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, and the top in the second step portion forms straight
The cylinder sleeve connecting hole of footpath increase, the bottom end face of the outer cylinder sheath are 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 lower oil filler point connected with the inner chamber of the outer cylinder sheath is set on second clutch disk.
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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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CN106703738B true CN106703738B (en) | 2018-02-06 |
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Families Citing this family (9)
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CN110725662B (en) * | 2017-12-01 | 2021-11-05 | 淮北卓本科技有限责任公司 | Device for petroleum industry |
CN109083617B (en) * | 2017-12-06 | 2024-07-16 | 北京帕菲诺精密机械有限公司 | Downhole end hydraulic switch |
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 |
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 |
CN112593891B (en) * | 2020-12-28 | 2022-05-31 | 雅安万利橡塑密封技术有限责任公司 | Blowout prevention box rubber core sealing assembly |
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 |
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 |
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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---|---|---|---|---|
SU1537794A1 (en) * | 1987-03-30 | 1990-01-23 | Машиностроительный Завод Им.Лейт.Шмидта | Blowout preventer |
US7832706B2 (en) * | 2007-02-16 | 2010-11-16 | Hydrill USA Manufacturing LLC | RAM BOP position sensor |
CN201786313U (en) * | 2010-09-06 | 2011-04-06 | 中国石油天然气集团公司 | Oil tube blowout control box |
CN201902191U (en) * | 2010-12-30 | 2011-07-20 | 宝鸡市赛孚石油机械有限公司 | Blowout preventer with side opening door |
CN102071897B (en) * | 2010-12-30 | 2013-07-10 | 宝鸡市赛孚石油机械有限公司 | Side door blowout preventing box |
CN102200000B (en) * | 2011-06-02 | 2014-04-02 | 宝鸡石油机械有限责任公司 | Blowout preventing box of continuous oil pipe and drill rod |
CN205823229U (en) * | 2016-05-11 | 2016-12-21 | 上海神开石油化工装备股份有限公司 | A kind of continuous oil pipe anti-blow-out box |
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