CN108286420A - A kind of caulking tube string and oil/gas well blocking method - Google Patents
A kind of caulking tube string and oil/gas well blocking method Download PDFInfo
- Publication number
- CN108286420A CN108286420A CN201710013493.6A CN201710013493A CN108286420A CN 108286420 A CN108286420 A CN 108286420A CN 201710013493 A CN201710013493 A CN 201710013493A CN 108286420 A CN108286420 A CN 108286420A
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- Prior art keywords
- packer
- pipe string
- tube
- expansion tube
- arc surface
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000000903 blocking effect Effects 0.000 title claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 21
- 239000000806 elastomer Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005553 drilling Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000012856 packing Methods 0.000 description 7
- 238000010002 mechanical finishing Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 230000008961 swelling Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000012224 working solution 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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)
- Pipe Accessories (AREA)
Abstract
The present invention relates to a kind of caulking tube string and oil/gas well blocking methods.The caulking tube string includes expansion tube, is configured to area of section increase under pressure；It is separately positioned on the packer of the upper and lower ends of expansion tube, the elastomer that packer has support tube and is sleeved on the outer wall of support tube, wherein support tube is connect with expansion tube form fit formula.After the caulking tube string is run into oil/gas well, the packer of upper end is located at the top of leak position, and the packer of lower end is located at the lower part of leak position, and expansion tube acts on leakage stratum, under pressure, the area of section of expansion tube increases and completes the purpose of leak stopping.
Description
Technical field
The present invention relates to oil gas field field of engineering technology, more particularly to a kind of caulking tube string and oil/gas well blocking method.
Background technology
In oil gas well drilling, well cementation, completion work progress, leakage is a kind of relatively conventional construction safety hidden danger.Well
After leakage occurs, the working solutions such as drilling fluid, completion fluid, mud can be missed into stratum.Due to geological conditions, drilling fluid and spudder
Journey design and other reasons, leakage can not avoid completely.Leakage is not only delayed drilling time, extends drilling period, can also damage
Drilling fluid is lost, causes the accidents such as bit freezing, blowout, well slough, wellbore can be caused to scrap when serious.To ensure that the safety of drilling engineering is applied
Work, it is necessary to actively implement effective leakage stopping technology.
Currently used leakage stopping technology, including pressurization sealing technology, plugging technology while drilling, plasticity leakage stopping technology, gas bore
Well leakage stopping technology.Above-mentioned leakage stopping technology achieves preferable application to a certain extent, but there are still many deficiencies.For example, stifled
Complex process is leaked, cost is higher.
Invention content
Some or all of regarding to the issue above, the present invention proposes a kind of caulking tube string and oil/gas well blocking method.It should
After caulking tube string is run into oil/gas well, leakage stratum is acted on by expansion tube, and realizes the purpose of leak stopping, leak-stopping technique
It is very simple.
According to an aspect of the present invention, a kind of caulking tube string is provided, including：
Expansion tube is configured to area of section increase under pressure,
It is separately positioned on the packer of the upper and lower ends of expansion tube, packer has support tube and is sleeved on the outer wall of support tube
On elastomer,
Wherein, support tube is connect with expansion tube form fit formula.
Expansion tube has arc surface section, inner concave arc surface section and connection arc surface section and inner concave arc surface section in one embodiment
Connection side plate bending.
In one embodiment, in two inner concave arc surface sections being arranged with relative type motor, and two inner concave arc surface sections it
Between wall thickness of the minimum range more than or equal to 2 times and less than 10 times of wall thickness.
In one embodiment, wall thickness of the radius more than or equal to 1.5 times of side plate bending and the wall thickness less than 5 times are connected.
In one embodiment, multiple elastomers are arranged in compartment on the outer wall of support tube.
In one embodiment, elastomer is made of water-swellable nitrile rubber or water-swellable cyaniding nitrile rubber.
In one embodiment, further include being arranged in running tool on the packer of upper end and setting is in place
The ball seat of detachable connection under the packer of lower end.
In one embodiment, between the packer and running tool positioned at upper end, and in the packing positioned at lower end
Transit joint is respectively set between device and ball seat, one end of transit joint is connect and section of the other end with support tube form fit formula
Surface construction is circle.
According to another aspect of the present invention, a kind of oil/gas well blocking method is provided, including：
Step 1 determines leak position,
Step 2, tripping in is according to the pipe string of any one of claim 1 to 8 so that the packer of upper end is located at leakage position
The top set, and the packer of lower end is located at the lower part of leak position,
Step 3, into pipe string pitching to act on ball seat,
Step 4, pumping pressure liquid make expansion tube and support tube expand.
In one embodiment, in step 4, in such a way that ladder is suppressed into pipe string pumping pressure liquid, wherein pressing
The pressure of power liquid increases by 2 to 5 megapascal in every 5 to 30 minutes.
Compared with the prior art, the advantages of the present invention are as follows：After the caulking tube string is run into oil/gas well, the envelope of upper end
It is located at the top of leak position every device, and the packer of lower end is located at the lower part of leak position, expansion tube acts on leakage stratum,
Under pressure, the area of section of expansion tube increases and completes the purpose of leak stopping.This blocking technological method is simple, technique at
This is low.
Description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein：
Fig. 1 schematically shows the structure chart of pipe string according to the present invention；
Fig. 2 schematically shows the stereogram of packer according to the present invention；
Fig. 3 schematically shows the structure chart of packer according to the present invention upon inflation；
Fig. 4 schematically shows the stereogram of transit joint according to the present invention；
Fig. 5 schematically shows the structure chart of transit joint according to the present invention upon inflation；
Fig. 6 schematically shows mechanical finishing device according to the present invention；
Fig. 7 shows the cooperation of mechanical finishing device and ball seat；
Fig. 8 shows the stereogram of expansion tube according to the present invention；
In the accompanying drawings, identical component uses identical reference numeral.Attached drawing is not according to actual ratio.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 shows caulking tube string 100 according to the present invention.As shown in Figure 1, pipe string 100 includes expansion tube 1 and packer
2.Wherein, its area of section can increase expansion tube 1 under pressure, the stratum for blocking leakage.In the upper of expansion tube 1
Packer 2 is respectively set in lower both ends, for leak position and other positions packing come.Also, packer 2 has support
Cylinder 21 and the elastomer 22 being arranged on the outer wall of support tube 21, support tube 21 with expansion tube 1 for being fixedly connected, and elastomer
22 have been used for packing effect.
After the caulking tube string 100 is run into oil/gas well, the packer 2 of upper end is located at the top of leak position, and under
The packer 2 at end is located at the lower part of leak position.Expansion tube 1 is at leakage stratum, and under pressure, expansion tube 1 is cut
Face area increases and completes the purpose of leak stopping.This blocking technological method is simple, and process costs are low.
In one embodiment, it as shown in figure 8, expansion tube 1 has arc surface section 11, inner concave arc surface section 12, and is used for
Connect the connection side plate bending 13 of inner concave arc surface section 12 and arc surface section 11.Preferably, relative type motor is arranged in two on expansion tube 1
Cancave cambered surface section 12.To generally digital " 8 " shape of cross sectional shape of expansion tube 1.But two opposite inner concave arc surface sections 12
Not in contact with, but the wall thickness of expansion tube 1 of the minimum value of the distance between two inner concave arc surface sections 12 more than or equal to 2 times is simultaneously
Wall thickness less than 10 times.It is, the distance that the most concave point of two inner concave arc surface sections 12 goes out is greater than or equal to twice of expansion tube 1
Wall thickness and less than 20 times of wall thickness.This structure can guarantee being smoothed out for later stage operation such as welding, while ensure swollen
1 dilatancy of tube expansion is smooth, to achieve the purpose that leak stopping.
In one embodiment, the radius of connection side plate bending 13 is greater than or equal to the wall thickness of 1.5 times of expansion tube 1 and is less than
5 times of wall thickness.It is avoided that stress concentration by this set, optimizes the shape of expansion tube 1, and expand change with making it easier to
Shape.
According to the present invention, as shown in Fig. 2, the form fit of the shape of support tube 21 and expansion tube 1.And weldering can be passed through
The mode connect links together support tube 21 and expansion tube 1.This structure so that connection is simple, handling ease.In addition, suitable
When with different oil/gas wells, the pipe string 100 with this structure is readily adjusted the length of expansion tube 1, to increase
The scope of application of pipe string 100.Elastomer 22 is socketed on the outer wall of support tube 21, and multiple bullets are arranged in compartment on support tube 21
Property body 22, to increase packing effect.
Preferably, elastomer 22 is made of water swelling rubber.After pipe string 100 is lowered into oil/gas well, elastomer
22 absorb water and expand, to realize the purpose of packing drop ply.For example, elastomer 22 is by water-swellable nitrile rubber or water-swellable
The hydro-expansive rubbers such as cyaniding nitrile rubber are made, its thickness can increase by 1.5 to 2 times after 22 water swelling of elastomer.Due to
Elastomer 22 has the characteristic of water swelling, then the elastomer 22 of same thickness can meet the oil/gas well of a variety of mineshaft diameters,
Increase the use scope of pipe string 100.In addition, the connection relation of elastomer 22 and support tube 21 is simple, then can also be easy to
Ground is adapted to the size of different pit shafts by adjusting the thickness of elastomer 22.
Running tool 3 is set in the upper end of the packer 2 positioned at upper end, for connecting drill string.In the packing positioned at lower end
The setting ball seat 4 of the lower end of device 2, for compound to play the role of blocking the inner cavity of pipe string 100 with the ball of input.Due to packing
The support tube 21 of device 2 is shaped piece, and in order to easy to connect, among the packer 2 and running tool 3 of upper end, and under
It is respectively provided with transit joint 5 between the packer 2 and ball seat 4 at end.As shown in figure 4, the cross sectional shape and branch of one end of transit joint 5
The cross sectional shape matching of cylinder 21 is supportted, and the cross-sectional configuration of the other end is circle, on the direction to pass through, support tube
21 gradual transition.The connection between each component is facilitated by the way that transit joint 5 is arranged.Wherein, the transition of running tool 3 and upper end
Connector 5 is threadedly coupled, after tripping in pipe string 100, can propose running tool 3 by rotating screw thread.Similarly, 4 He of ball seat
The transit joint 5 of lower end is threadedly coupled, and can ball seat 4 be proposed pit shaft, and realizes the full-bore of pipe string 100.This mode
The processes such as latus rectum milling are avoided, the production cycle is reduced.
The present invention also provides a kind of oil/gas well blocking methods, and the side of oil/gas well leak stopping is described in detail below according to Fig. 1 to 7
Method.
First, by way of drilling leakage stratum, the position of drop ply is determined.
Then, tripping in pipe string 100 so that the packer 2 of upper end is located at the top of leak position, and the packer 2 of lower end
Positioned at the lower part of leak position.After 100 tripping in of pipe string, the water suction of elastomer 22 of packer 2 starts expansion and is set with realizing.
Subsequently, into pipe string 100, pitching is to act on ball seat 5, to block the inner cavity of pipe string 100.
Then, cementing concrete truck or drilling pump the pumping pressure liquid into pipe string 100 are used from ground, so that expansion tube 1,
The demi-inflation of support tube 21 and transit joint 5.During this, mode that ladder is suppressed may be used into pipe string 100
Pumping pressure liquid.For example, the pressure of pressure fluid increases by 2 to 5 megapascal in every 5 to 30 minutes.
Followed by judging whether the packer 2 of pipe string 100 sets.For example, can be by lifting from the top and puting down the side of pipe string 100
Formula carries out.Specifically, first W (the rotation weight of pipe string 100) is used to add the power upper lifting pipe string 100 of thousand newton of 50-100, then made again
The power decentralization pipe string 100 that 50 to 100 thousand newton are subtracted with W, if pipe string 100 does not move, can conclude that pipe string 100 is close to
The borehole wall, position are stablized.
In addition, disconnecting the link between running tool 3 and the transit joint 5 of upper end, carried with will be fed into tool 3 by drill string
Go out.
Finally, tripping in mechanical finishing device 50 is modified with the inner cavity to pipe string 100.As shown in fig. 6, mechanical finishing
Device 50 includes trimmer main body 51 and the fishing head 52 extended downwardly by trimmer main body.In mechanical finishing device 50 by pressure
During tripping in, trimmer main body 51 acts on the inner cavity of pipe string 100 to be modified to it.Block in fishing head 52 and ball seat 4
After connecing, as shown in fig. 7, screwing mechanical finishing device 50 to screw down ball seat 4 from transit joint 5, to carry machinery upper
It can be by ball seat 4 it is also proposed that pit shaft, to realize the latus rectum of pipe string 100 when finishing device 50.
Pipe string 100 according to the present invention has anisotropic expansion tube 1, and the mode of hydraulic pressure or machinery may be used and make expansion
Pipe 1 is attached on the borehole wall, realizes the purpose on isolation leakage stratum.Drop ply success rate height, operating cost are blocked using this pipe string 100
It is low, it is environmental-friendly, meanwhile, do not lose hole diameter.
In the application, orientation is for "up" and "down" using the actual use orientation of pipe string 100 as reference.
Although by reference to preferred embodiment, invention has been described, the case where not departing from the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited in texts
Disclosed in specific embodiment, but include all technical solutions fallen within the scope of the appended claims.
Claims (10)
1. a kind of caulking tube string, which is characterized in that including：
Expansion tube is configured to area of section increase under pressure,
It is separately positioned on the packer of the upper and lower ends of the expansion tube, the packer has support tube and is sleeved on the support
Elastomer on the outer wall of cylinder,
Wherein, the support tube is connect with the expansion tube form fit formula.
2. pipe string according to claim 1, which is characterized in that the expansion tube have arc surface section, inner concave arc surface section and
Connect the connection side plate bending of the arc surface section and the inner concave arc surface section.
3. pipe string according to claim 2, which is characterized in that in the expansion tube two with relative type motor setting is described
Cancave cambered surface section, and the minimum range between two inner concave arc surface sections is greater than or equal to 2 times of wall thickness and is less than 10 times
Wall thickness.
4. pipe string according to claim 2 or 3, which is characterized in that the radius of the connection side plate bending is greater than or equal to 1.5
Times wall thickness and less than 5 times of wall thickness.
5. pipe string according to any one of claims 1 to 4, which is characterized in that be spaced on the outer wall of the support tube
Multiple elastomers are arranged in formula.
6. pipe string according to claim 5, which is characterized in that the elastomer is swollen by water-swellable nitrile rubber or chance water
Swollen cyaniding nitrile rubber is made.
7. the pipe string according to any one of claim 1 to 6, which is characterized in that further include the institute for being arranged in upper end
State the ball seat of the running tool on packer and the detachable connection being arranged under the packer of lower end.
8. pipe string according to claim 7, which is characterized in that positioned at upper end the packer and the running tool
Between, and transit joint is respectively set between the packer and the ball seat positioned at lower end, the transit joint
One end is connect with the support tube form fit formula and the cross-sectional configuration of the other end is circle.
9. a kind of oil/gas well blocking method, which is characterized in that including：
Step 1 determines leak position,
Step 2, pipe string of the tripping according to any one of claim 1 to 8 so that the packer of upper end is located at leakage position
The top set, and the packer of lower end is located at the lower part of leak position,
Step 3, into the pipe string pitching to act on ball seat,
Step 4, pumping pressure liquid make expansion tube and support tube expand.
10. according to the method described in claim 9, it is characterized in that, in step 4, to described in such a way that ladder is suppressed
The pressure of pumping pressure liquid in pipe string, wherein pressure fluid increases by 2 to 5 megapascal in every 5 to 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710013493.6A CN108286420A (en) | 2017-01-09 | 2017-01-09 | A kind of caulking tube string and oil/gas well blocking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710013493.6A CN108286420A (en) | 2017-01-09 | 2017-01-09 | A kind of caulking tube string and oil/gas well blocking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108286420A true CN108286420A (en) | 2018-07-17 |
Family
ID=62819315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710013493.6A Pending CN108286420A (en) | 2017-01-09 | 2017-01-09 | A kind of caulking tube string and oil/gas well blocking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108286420A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630210A (en) * | 2019-10-16 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Loess layer leakage-proof plugging tool and use method thereof |
| CN112177558A (en) * | 2020-10-13 | 2021-01-05 | 中国矿业大学 | Novel underground coal gasification exploitation process leakage plugging device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630210A (en) * | 2019-10-16 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Loess layer leakage-proof plugging tool and use method thereof |
| CN110630210B (en) * | 2019-10-16 | 2023-12-01 | 中国石油天然气集团有限公司 | Leakage-proof plugging tool for yellow soil layer and using method thereof |
| CN112177558A (en) * | 2020-10-13 | 2021-01-05 | 中国矿业大学 | Novel underground coal gasification exploitation process leakage plugging device |
| CN112177558B (en) * | 2020-10-13 | 2021-06-25 | 中国矿业大学 | Novel underground coal gasification exploitation process leakage plugging device |
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Application publication date: 20180717 |