CN109505553A - The application method of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation - Google Patents
The application method of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation Download PDFInfo
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- CN109505553A CN109505553A CN201811416791.0A CN201811416791A CN109505553A CN 109505553 A CN109505553 A CN 109505553A CN 201811416791 A CN201811416791 A CN 201811416791A CN 109505553 A CN109505553 A CN 109505553A
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- 239000000725 suspension Substances 0.000 title claims abstract description 31
- 238000009434 installation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000009471 action Effects 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000008901 benefit Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 241000222712 Kinetoplastida Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013589 supplement Substances 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of application methods of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation.Its technical solution is: compensating the outside connection moving piston of fixed body, two groups of compensation fixed bodies and two groups of compensation mobiles cooperate, are equipped with slips on the inside of every group of compensation mobile, fix by the outer wall of slips and coiled tubing；In addition, it compensates mobile to move along the inclined-plane of compensation fixed body, and under the force action of the elastic force of support spring and the gravity of compensation mobile, makes to compensate the downward inside movement of mobile, and the outer wall of slips and coiled tubing is driven further to hold fixation tightly, realize real-time compensation.Beneficial effect is: slips of the invention and the coiled tubing of diameter contracting realize holding effect, realize dynamic compensating action, in this way, before coiled tubing diameter is reduced to a certain degree, the compensation of available slips is held tightly always, to extend the working time of oil well, reduces the number of workover treatment, improve the efficiency of Petroleum Production.
Description
Technical field
The present invention relates to a kind of four ram preventer of coiled tubing suspension auxiliary device and methods, in particular to a kind of continuous
The application method of four ram preventer of oil pipe suspension diameter contracting autocompensation installation.
Background technique
In the work progress of coiled tubing, 4FZ preventer, that is, four ram preventers, one kind must be installed
Safety device, in this arrangement, four ram preventer of coiled tubing have very important in continuous oil pipe operation
Status, for preventing from the equipment of blowout occur during continuous oil pipe operation.Four flashboard assemblies are configured, it can be achieved that well head is without Guan Mi
Envelope, oil pipe shearing, have the seal of tube at oil pipe suspension；Suitable for high-pressure well mouth and H2S working environment, using hydraulic-driven, response speed
Degree is fast, and has manual locking, and safety coefficient is high.Wherein, the function of hanging flashboard is to remain stationary the coiled tubing after shearing
State, but coiled tubing is generally more than one liang of km, deeper more than four or five kms, 2.4 tons of weights of each km, this
The suspension force of sample, four ram preventers needed is very big, and the short time is out of question, but due to the own wt of coiled tubing compared with
Greatly, it may appear that diameter contracting phenomenon, the case where metal that the tension test similar to metal occurs elongates, in this way, existing suspension
Slips cannot dynamically adjust clamping force in real time, this has resulted in suspension failure, cause coiled tubing to fall into oil/gas well, make
At production accident, can only be completed by well workover salvaging.
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, outer end is connect with handwheel mandrel；The fluid cylinder it is interior
End is fixed with guide rod, and corresponding blind rams, shear ram, suspension flashboard and half envelope lock are inserted into the inner end of guide rod
In square groove below plate.The utility model flashboard body is connected by hanging platform, guide rod and piston, increases forced area, and intensity is big,
Guiding is steady, and guiding is safe and reliable.But it hangs flashboard that the problem of still having is as follows: although using eccentric structure, mesh
Be increasing friction force, but the utility model patent, there is no the compensation for not solving the problems, such as that diameter contracts at all, and eccentric structure is also
It is squeezing action to be generated to coiled tubing, and cause Light deformation, or even influence the internal orifice dimension of coiled tubing, due to the utility model
The diameter contracting power for not implementing to compensate coiled tubing still can fall off when diameter contracting reaches a certain level.
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 blowout prevention of coiled tubing
Device hangs the application method of diameter contracting autocompensation installation, for the suspension flashboard of four ram preventers, by increasing real-time diameter
Truncate compensation structure come to coiled tubing diameter contracting compensates, thus realize it is lasting coiled tubing is held tightly, the company of avoiding
Continuous oil pipe falls off, and extends the time of job execution, reduces construction cost.
A kind of application method for four ram preventer of coiled tubing suspension diameter contracting autocompensation installation that the present invention mentions, packet
Include following steps:
A, the suspension flashboard assembling of four ram preventer of coiled tubing:
Prosthetics mobile (2) are organized first, the inside installation of the compensation mobile (2) of one group of prismatoid structure is semicylindrical
Slips, then, the group compensate installation support spring (3) and spring base (4), spring base (4) in the downside supported hole of mobile (2)
Bottom be equipped with movement steel ball (5), by the group compensation mobile (2) outside inclined-plane by T shape protrusion and compensation fixed body
(1) the T connected in star on the inclined-plane of one group of prismatoid cooperates, and then, fixer is installed on the outside of the prismatoid of compensation fixed body (1)
Cylinder pressure cap (9), and moving piston (8) and adjusting screw (10) are installed, complete the installation of side；Similarly, the benefit of the other side is completed
It repays fixed body (1) and is combined with the installation for compensating mobile (2), two semicylindrical slips is made to hold coiled tubing outer wall tightly, this
When, compensation mobile (2) is located at the lower section of compensation fixed body (1)；
B, the operating process of the suspension flashboard of four ram preventers:
After reaching designated position under coiled tubing lower going-into-well, half envelope operation is realized in the half envelope flashboard movement of four ram preventers
Afterwards, it is then turned on the suspension flashboard of four ram preventers, drives moving piston (8) mobile by hydraulic cylinder, and push two groups of compensation
Fixed body (1) is squeezed to the direction of coiled tubing, due to being equipped with slips, the close company of holding tightly of slips on the inside of compensation mobile (2)
The outer wall of continuous oil pipe, when hydraulic cylinder continues to suppress, at this point, two groups of compensation mobiles (2) are convex by the T shape installed on inclined-plane respectively
It rises, is matched with the T connected in star of compensation fixed body (1), to make one group of compensation mobile (2) along compensation fixed body (1)
Inclined-plane moves up, while will compensate the compression of the support spring (3) in mobile (2), and keeps compensation mobile (2) solid by compensating
Determine the top that compensation fixed body (1) is pushed to below body (1), the internal diameter for the annulus that slips is formed at this time is greater than compensation mobile
(2) internal diameter for the annulus that slips is formed when compensating below fixed body (1)；
C, when there is diameter contracting phenomenon after hanging for a long time in coiled tubing:
Since length is very long under coiled tubing lower going-into-well, after prolonged use, its own weight causes the diameter of coiled tubing to contract
Phenomenon, compensation mobile (2) can move down under the action of support spring (3) along the inclined-plane of prismatoid, simultaneously as
Compensation mobile (2) is equipped with movement steel ball (5), makes to compensate mobile (2) in folding process, while along ontology (6)
Upper surface moves radially, and then slips is made diameter contracting phenomenon also occur, further holds the coiled tubing of diameter contracting tightly, realizes coiled tubing
The automatic compensation of diameter contracting, until the upper surface of ontology (6) is arrived in the lower surface of compensation mobile (2), compensation terminates.
Preferably, above-mentioned compensation fixed body (1) is prismatoid structure, and the medial slope of prismatoid structure is equipped with one
Or the T connected in star of one or more, and two groups of compensation fixed body (1) combinations form the cavity of prismatoid structure.
Preferably, above-mentioned compensation mobile (2) is prismatoid structure, and the outer wall of prismatoid structure is equipped with T shape protrusion, with
The T connected in star of compensation fixed body (1) matches, and realizes and moves down on inclined-plane of compensation mobile (2) along compensation fixed body (1)
It is dynamic.
Preferably, above-mentioned slips (15) is semi-cylindrical shaped structure, and two groups of slips form columnar structured, the interior table of slips
Face is equipped with slip insert, is cooperated by the outer wall of slip insert and coiled tubing and is fixed.
The beneficial effects of the present invention are: compensation fixed body and compensation activity of the present invention by the prismatoid structure of design
Body, and the two is cooperated by T-type protrusion on inclined-plane and T-type groove, be equipped in compensation mobile support spring, spring base,
Steel ball and slips are moved, makes to compensate the top that mobile is located at compensation fixed body in the early stage, can firmly hold tightly at this time continuous
Oil pipe；When coiled tubing long-time service after there is diameter contracting phenomenon after, compensation mobile can along inclined-plane, and support spring with
Under the action of gravity, compensation mobile is pushed to move down along the inclined-plane of compensation fixed body, meanwhile, in the booster action of movement steel ball
Under, compensation mobile's radial motion while moving down is driven, and then make the further undergauge of slips, the coiled tubing to contract with diameter is again
Holding effect is realized, that is, realizes dynamic compensating action, in this way, before coiled tubing diameter is reduced to a certain degree,
The compensation of available slips is held tightly always, to extend the working time of oil well, reduces the number of workover treatment, is improved
The efficiency of Petroleum Production；
In addition, the slip insert of slips inner surface uses spiral trapezoidal thread structure or annular teeth, more resistant to fatigue, and
Slip insert is also configured as structure wide at the top and narrow at the bottom, also improves the ability for holding coiled tubing tightly.
Detailed description of the invention
Attached drawing 1 is the overall schematic of the invention applied in four ram preventers；
Attached drawing 2 is the structural schematic diagram after present invention combination；
Attached drawing 3 is the structural schematic diagram at installation initial stage of the present invention；
Attached drawing 4 is structure chart of the present invention after moving piston propulsion；
Attached drawing 5 is structural schematic diagram when a degree of diameter contracting occurs in coiled tubing；
Attached drawing 6 is structural schematic diagram when present invention compensation is maximum；
Attached drawing 7 is the structural schematic diagram for compensating mobile；
Attached drawing 8 is the top view for compensating mobile；
Attached drawing 9 is the structural schematic diagram for compensating fixed body；
Attached drawing 10 is the top view for compensating fixed body；
Attached drawing 11 is the side schematic view of one group of slips；
Attached drawing 12 is the top view of one group of slips；
Attached drawing 13 is the inner surface schematic diagram of the slips of embodiment 4；
In upper figure: compensation fixed body 1, compensation mobile 2, support spring 3, spring base 4, movement steel ball 5, ontology 6, hydraulic connecting
It is block 7, moving piston 8, fluid cylinder pressure cap 9, adjusting screw 10, connection bolt 11, pressure cap connection bolt 12, connected pipes 13, hydraulic
Cylinder 14, slips 15, compressing hole 1.1, supported hole 2.1, T shape protrusion 2.2, slip insert 15.1.
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, referring to attached drawing 1, four ram preventer of a kind of coiled tubing suspension diameter contracting that the present invention mentions is automatic to be mended
Repay device, technical solution is: including compensation fixed body 1, compensation mobile 2, support spring 3, spring base 4, movement steel ball 5,
Slips 15, the outside of the compensation fixed body 1 connect moving piston 8, and two groups of compensation fixed bodies 1 form prismatoid cavity knot
Structure, and the height for cooperating with two groups of compensation mobiles 2 of prismatoid structure, and compensating mobile 2 is less than compensation fixed body 1
Highly, the inside of every group of compensation mobile 2 is equipped with slips 15, is fixed, is avoided by slips 15 and the outer wall of coiled tubing 13
Coiled tubing falls off；The middle part of every group of compensation mobile 2 is equipped with supported hole 2.1, and support spring 3 and spring are installed in supported hole
Seat 4, the bottom of the spring base 4 are equipped with movement steel ball 5, the ontology being connect by movement steel ball 5 with compensation 1 lower surface of fixed body
6 roll cooperation, move compensation mobile 2 along the inclined-plane of compensation fixed body 1, and live in the elastic force of support spring 3 and compensation
Under the force action of the gravity of kinetoplast 2, make to compensate the downward inside movement of mobile 2, and drive slips 15 and coiled tubing 13
Outer wall further hold fixation tightly.
Referring to attached drawing 9 and 10, compensation fixed body 1 of the invention is prismatoid structure, on the medial slope of prismatoid structure
Equipped with one or more than one T connected in stars, and two groups of compensation fixed bodies 1 combine the cavity for forming prismatoid structure.
Referring to attached drawing 7-8, compensation mobile 2 of the invention is prismatoid structure, and it is convex that the outer wall of prismatoid structure is equipped with T shape
2.2 are played, is matched with the T connected in star of compensation fixed body 1, moreover, the height of compensation mobile 2 is less than the height of compensation fixed body 1
Degree, generally can be with the height of design compensation mobile 2 compensation fixed body 1 height half to 3/4ths, in this way,
There is certain activity space in compensation mobile 2 relative to the inclined-plane of compensation fixed body 1, and compensation mobile 2 may be implemented along benefit
The inclined-plane for repaying fixed body 1 moves up and down, so that the cooperation of slips and coiled tubing is driven to fix, but the defect of such design is
The contact area that fixed slips is contacted with coiled tubing also reduces accordingly, and chucking power is caused to reduce accordingly, and supplements
Be limited in scope, when compensate fall on the upper surface of ontology under mobile 2 when, then terminate to compensate.
Referring to attached drawing 12, slips 15 of the invention is semi-cylindrical shaped structure, and two groups of slips compositions are columnar structured, slips
Inner surface is equipped with slip insert 15.1, is cooperated by the outer wall of slip insert and coiled tubing and is fixed, wherein the slips of slips inner surface
Tooth uses spiral trapezoidal thread structure, and the grip formed between slips and coiled tubing can be made more lasting.
In addition, the outside of compensation fixed body 1 is equipped with compressing hole 1.1, moving piston 8 is pushed by adjusting screw 10, will be mended
It repays fixed body 1 and is fixed on a position.In addition, the other parts about four ram preventer of coiled tubing are the prior art,
This is no longer described in detail.
A kind of application method for four ram preventer of coiled tubing suspension diameter contracting autocompensation installation that the present invention mentions, packet
Include following steps:
A, the suspension flashboard assembling of four ram preventer of coiled tubing:
Prosthetics mobile 2 is organized first, and semicylindrical card is installed into the inside of the compensation mobile 2 of one group of prismatoid structure
Watt, then, which compensates installation support spring 3 and spring base 4 in the downside supported hole of mobile 2, the bottom installation of spring base 4
There is movement steel ball 5, the outside inclined-plane of group compensation mobile 2 is passed through into one group of prismatoid of T shape protrusion and compensation fixed body 1
The T connected in star on inclined-plane cooperates, and then, fixed fluid cylinder pressure cap 9 is installed on the outside of the prismatoid of compensation fixed body 1, and install movement
Piston 8 and adjusting screw 10, complete the installation of side；Similarly, it completes the compensation fixed body 1 of the other side and compensates mobile 2
Installation combination makes two semicylindrical slips hold coiled tubing outer wall tightly, at this point, compensation mobile 2 is located at compensation fixed body 1
Lower section；
B, the operating process of the suspension flashboard of four ram preventers:
After reaching designated position under coiled tubing lower going-into-well, half envelope operation is realized in the half envelope flashboard movement of four ram preventers
Afterwards, it is then turned on the suspension flashboard of four ram preventers, drives moving piston 8 mobile by hydraulic cylinder, and push two groups of compensation solid
Determine body 1 to squeeze to the direction of coiled tubing, due to being equipped with slips on the inside of compensation mobile 2, slips closely holds coiled tubing tightly
Outer wall, when hydraulic cylinder continues to suppress, at this point, two groups of compensation mobiles 2 are respectively by the T shape protrusion installed on inclined-plane, with benefit
The T connected in star for repaying fixed body 1 matches, thus move up one group of compensation mobile 2 along the inclined-plane of compensation fixed body 1,
The support spring 3 compensated in mobile 2 is compressed simultaneously, and compensation mobile 2 is made to be pushed to benefit by the lower section of compensation fixed body 1
The top of fixed body 1 is repaid, the internal diameter for the annulus that slips is formed at this time is greater than compensation mobile 2 and blocks when compensating below fixed body 1
Shoe at annulus internal diameter；
C, when there is diameter contracting phenomenon after hanging for a long time in coiled tubing:
Since length is very long under coiled tubing lower going-into-well, after prolonged use, its own weight causes the diameter of coiled tubing to contract
Phenomenon, compensation mobile 2 can move down under the action of support spring 3 along the inclined-plane of prismatoid, simultaneously as compensation
Mobile 2 is equipped with movement steel ball 5, makes to compensate mobile 2 in folding process, while radially moving along the upper surface of ontology 6
It is dynamic, and then slips is made diameter contracting phenomenon also occur, it further holds the coiled tubing of diameter contracting tightly, realizes the automatic benefit of coiled tubing diameter contracting
It repays, until the upper surface of ontology 6 is arrived in the lower surface of compensation mobile 2, compensation terminates.
Embodiment 2, referring to attached drawing 11, four ram preventer of a kind of coiled tubing suspension diameter contracting that the present invention mentions is automatic to be mended
Repay device, difference from Example 1 is: the slip insert for the slips inner surface that the present invention mentions is using annular teeth, the annular
The section of teeth is triangular structure of right angle, and the outer wall for making two groups of slips combine the cylinder-shaped slips face and coiled tubing to be formed exists
When contact, holding can be fixedly secured.
Embodiment 3, four ram preventer of a kind of coiled tubing that the present invention mentions hangs diameter contracting autocompensation installation, with reality
Example 1 and 2 is applied to be a difference in that: " well " font teeth that the slip insert for the slips inner surface that the present invention mentions uses, it is laterally and vertical
To being distributed with groove, in this way, when the outer wall that two groups of slips combine the cylinder-shaped slips face and coiled tubing to be formed contacts, promptly
Power is more preferable.
Embodiment 4, referring to attached drawing 13, four ram preventer of a kind of coiled tubing suspension diameter contracting that the present invention mentions is automatic to be mended
Device is repaid, is a difference in that with embodiment 1,2,3: the grid-shaped tooth that the slip insert for the slips inner surface that the present invention mentions uses
Tooth laterally and diagonally distributes and has groove, in this way, the outer wall that two groups of slips combine the cylinder-shaped slips face and coiled tubing to be formed connects
When touching, grasp is more preferable.
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 (4)
1. a kind of application method of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation, it is characterized in that: include with
Lower step:
A, the suspension flashboard assembling of four ram preventer of coiled tubing:
Prosthetics mobile (2) are organized first, the inside installation of the compensation mobile (2) of one group of prismatoid structure is semicylindrical
Slips, then, the group compensate installation support spring (3) and spring base (4), spring base (4) in the downside supported hole of mobile (2)
Bottom be equipped with movement steel ball (5), by the group compensation mobile (2) outside inclined-plane by T shape protrusion and compensation fixed body
(1) the T connected in star on the inclined-plane of one group of prismatoid cooperates, and then, fixer is installed on the outside of the prismatoid of compensation fixed body (1)
Cylinder pressure cap (9), and moving piston (8) and adjusting screw (10) are installed, complete the installation of side；Similarly, the benefit of the other side is completed
It repays fixed body (1) and is combined with the installation for compensating mobile (2), two semicylindrical slips is made to hold coiled tubing outer wall tightly, this
When, compensation mobile (2) is located at the lower section of compensation fixed body (1)；
B, the operating process of the suspension flashboard of four ram preventers:
After reaching designated position under coiled tubing lower going-into-well, half envelope operation is realized in the half envelope flashboard movement of four ram preventers
Afterwards, it is then turned on the suspension flashboard of four ram preventers, drives moving piston (8) mobile by hydraulic cylinder, and push two groups of compensation
Fixed body (1) is squeezed to the direction of coiled tubing, due to being equipped with slips, the close company of holding tightly of slips on the inside of compensation mobile (2)
The outer wall of continuous oil pipe, when hydraulic cylinder continues to suppress, at this point, two groups of compensation mobiles (2) are convex by the T shape installed on inclined-plane respectively
It rises, is matched with the T connected in star of compensation fixed body (1), to make one group of compensation mobile (2) along compensation fixed body (1)
Inclined-plane moves up, while will compensate the compression of the support spring (3) in mobile (2), and keeps compensation mobile (2) solid by compensating
Determine the top that compensation fixed body (1) is pushed to below body (1), the internal diameter for the annulus that slips is formed at this time is greater than compensation mobile
(2) internal diameter for the annulus that slips is formed when compensating below fixed body (1)；
C, when there is diameter contracting phenomenon after hanging for a long time in coiled tubing:
Since length is very long under coiled tubing lower going-into-well, after prolonged use, its own weight causes the diameter of coiled tubing to contract
Phenomenon, compensation mobile (2) can move down under the action of support spring (3) along the inclined-plane of prismatoid, simultaneously as
Compensation mobile (2) is equipped with movement steel ball (5), makes to compensate mobile (2) in folding process, while along ontology (6)
Upper surface moves radially, and then slips is made diameter contracting phenomenon also occur, further holds the coiled tubing of diameter contracting tightly, realizes coiled tubing
The automatic compensation of diameter contracting, until the upper surface of ontology (6) is arrived in the lower surface of compensation mobile (2), compensation terminates.
2. the application method of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation according to claim 1,
It is characterized in that: the compensation fixed body (1) is prismatoid structure, the medial slope of prismatoid structure is equipped with one or one
Above T connected in star, and two groups of compensation fixed body (1) combinations form the cavity of prismatoid structure.
3. the application method of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation according to claim 2,
It is characterized in that: the compensation mobile (2) is prismatoid structure, the outer wall of prismatoid structure is equipped with T shape protrusion, solid with compensation
The T connected in star for determining body (1) matches, and realizes that compensation mobile (2) is moved up and down along the inclined-plane of compensation fixed body (1).
4. the application method of four ram preventer of coiled tubing suspension diameter contracting autocompensation installation according to claim 1,
It is characterized in that: the slips (15) is semi-cylindrical shaped structure, two groups of slips compositions are columnar structured, and the inner surface of slips is equipped with
Slip insert is cooperated by the outer wall of slip insert and coiled tubing and is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416791.0A CN109505553B (en) | 2018-11-26 | 2018-11-26 | Using method of coiled tubing four-ram blowout preventer suspension diameter shrinkage automatic compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416791.0A CN109505553B (en) | 2018-11-26 | 2018-11-26 | Using method of coiled tubing four-ram blowout preventer suspension diameter shrinkage automatic compensation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109505553A true CN109505553A (en) | 2019-03-22 |
| CN109505553B CN109505553B (en) | 2020-09-01 |
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| CN201811416791.0A Active CN109505553B (en) | 2018-11-26 | 2018-11-26 | Using method of coiled tubing four-ram blowout preventer suspension diameter shrinkage automatic compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403906A (en) * | 2018-11-26 | 2019-03-01 | 秘天昊 | Four ram preventer of coiled tubing hangs diameter contracting autocompensation installation |
| CN113464082A (en) * | 2021-06-29 | 2021-10-01 | 胡宪均 | High-service-life rotary blowout preventer for oil field |
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