CN108643888A - Technical pipe column and method for detecting pressure bearing of casing patching section - Google Patents
Technical pipe column and method for detecting pressure bearing of casing patching section Download PDFInfo
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- CN108643888A CN108643888A CN201810467726.4A CN201810467726A CN108643888A CN 108643888 A CN108643888 A CN 108643888A CN 201810467726 A CN201810467726 A CN 201810467726A CN 108643888 A CN108643888 A CN 108643888A
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- oil pipe
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000012512 characterization method Methods 0.000 claims description 21
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 37
- 239000004615 ingredient Substances 0.000 description 10
- 238000007789 sealing Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/117—Detecting leaks, e.g. from tubing, by pressure testing
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a casing patching section pressure-bearing detection process pipe column and a method, wherein the pipe column comprises the following components: the packer comprises a casing, an oil pipe, a first packer, a second packer, a flow guide device and an oil drainer. The inner wall of the sleeve is provided with a patch section. The oil pipe is sleeved in the sleeve and forms an annular space with the sleeve. The first packer is disposed above the casing patch. The second packer can pass through the casing subsidy section to set up the below at the casing subsidy section. The guiding device is connected with the oil pipe and corresponds to the position of the casing patching section, the guiding device has at least two working states, when the guiding device is in the first working state, the inside of the oil pipe is isolated from the annular space, and when the guiding device is in the second working state, the inside of the oil pipe is communicated with the annular space. The oil drain is connected to the tail end of the oil pipe and used for draining fluid in the oil pipe. Through the design of this tubular column, can effectively realize the detection of sleeve pipe subsidy section, and can solve the problem of play tubular column overflow.
Description
Technical field
The application belongs to technical field of petroleum extraction, and in particular to a kind of casing patching section pressure-bearing characterization processes tubing string and side
Method.
Background technology
Currently, some heavy oil blocks mostly use the production practices such as the drive of high temperature vapour or steam soak.However, prolonged exploitation
It can to alter layer between stratum serious, cause production casing damage.Staff is needed to repair and mend casing in this way
Operation is pasted, after casing patching, therefore subsidy section diameter can reduce, cause conventional downhole tool can not normally casing into casing patching
Section to whether subsidy section pressure-bearing reaches requirement hereinafter, also can not effectively be detected in turn.
In this regard, there has been no effective solution methods at present.
Invention content
In order to overcome the drawbacks described above of the prior art, technical problem to be solved by the invention is to provide a kind of casing patchings
The detection of casing patching section pressure-bearing may be implemented in section pressure-bearing characterization processes tubing string and method.
The specific technical solution of the present invention is：
The present invention provides a kind of casing patching section pressure-bearing characterization processes tubing string, including：
Casing, inner wall have subsidy section；
Oil pipe is set in described sleeve pipe, and forms annular space with described sleeve pipe；
The top that section is subsidized in described sleeve pipe is arranged in first packer；
Second packer can subsidize section by described sleeve pipe, and the lower section for subsidizing section in described sleeve pipe is arranged；
Guiding device is connected on the oil pipe, and corresponding with the described sleeve pipe subsidy position of section, the water conservancy diversion dress
Setting has at least two working conditions, when the guiding device is located at the first working condition, the oil pipe inside and the annular
Space is isolated, and when the guiding device is located at the second working condition, is connected with the annular space inside the oil pipe；
Bleeder is connected to the end of the oil pipe, for releasing the fluid in the oil pipe.
In one embodiment, first packer is Y521 type anchoring packers.
In one embodiment, second packer is Y341 type packers.
In one embodiment, the guiding device includes：
Shell, the shell extend along longitudinally, and have upper port and lower port, and chamber is offered in the shell
Room, the chamber are connected with the upper port, are isolated with the lower port；
Flow-guiding channel, the longitudinally along the shell are opened in the shell, the flow-guiding channel and the chamber
Room is isolated, and is conducted with the upper port and the lower port；
Deflector hole, runs through the side wall of the shell, and is conducted with the chamber, is isolated with the flow-guiding channel；
Sliding sleeve is located in the chamber, and is fixed in by pin the top of the deflector hole, the sliding sleeve with it is described
Housing seal connects.
In one embodiment, the bleeder is draw-ring type bleeder.
In one embodiment, the bleeder end is connected with screen casing.
In one embodiment, the end of the screen casing is connected with silk plug or starting taper.
In addition, the present invention also provides the technique sides that a kind of any of the above-described described sleeve pipe subsidizes section pressure-bearing characterization processes tubing string
Method includes the following steps：
Described sleeve pipe subsidy section pressure-bearing characterization processes tubing string is lowered into target location, the first packer of rotation makes its seat
Envelope；
After waiting for first packer setting, the fluid of the first predetermined pressure is squeezed into the oil pipe, is made described
Second packer setting；
After waiting for second packer setting, continue the fluid for squeezing into the second predetermined pressure into the oil pipe, directly
Pin to the guiding device is cut, and the chamber is made to be connected with the annular space, and the fluid flows into the annular
In space；
Continue to squeeze into third predetermined pressure or more into the oil pipe, the voltage stabilizing predetermined time；If pressure does not drop, casing
It is qualified to subsidize section；If pressure declines, casing patching section is unqualified.
In one embodiment, further include following steps：
After waiting for described sleeve pipe subsidy section detection, into the oil pipe, the bleeder is proposed to manage by tripping in sucker rod
Column, and then the fluid on second packer top is discharged into pit shaft lift pipe string again.
In one embodiment, first predetermined pressure is 16MPa, and second predetermined pressure is 18MPa, described
Third predetermined pressure is 15MPa, and the predetermined time is 30 minutes.
By above technical solution, the advantageous effect of the application is：The casing patching section pressure-bearing of the present invention detects work
Skill tubing string and method can utilize Y341 jackets to become packer cooperation Y521 type anchoring packers, realize subsidy section bearing capacity inspection
Survey technique.More than 20 well of field conduct, construction success rate are more than 90%, by this design of string pipe, can effectively realize casing patching
The detection of section, and can solve the problems, such as lift pipe string overflow.
With reference to following description and accompanying drawings, the particular implementation of the application is disclosed in detail, specifies the original of the application
Reason can be in a manner of adopted.It should be understood that presently filed embodiment is not so limited in range.In appended power
In the range of the spirit and terms that profit requires, presently filed embodiment includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It is used in a other embodiment, it is combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Description of the drawings
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed in the present application in any way
It encloses.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help the understanding to the application, and
It is not the specific shape and proportional sizes for limiting each component of the application.Those skilled in the art, can under teachings of the present application
Implement the application to select various possible shapes and proportional sizes as the case may be.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of the casing patching section pressure-bearing characterization processes tubing string of the application embodiment；
Fig. 2 is the structural schematic diagram of the guiding device of the application embodiment.
The reference numeral of the figures above：1, casing；11, section is subsidized；2, oil pipe；3, annular space；4, the first packer；5、
Second packer；6, guiding device；61, shell；611, upper port；612, lower port；613, chamber；62, flow-guiding channel；63、
Deflector hole；64, sliding sleeve；65, pin；7, bleeder；8, screen casing；9, silk plug
Specific implementation mode
Below in conjunction with the attached drawing in the application embodiment, the technical solution in the application embodiment is carried out clear
Chu is fully described by, it is clear that described embodiment is only a part of embodiment of the application, rather than whole realities
Apply mode.Based on the embodiment in the application, those of ordinary skill in the art institute without creative efforts
The every other embodiment obtained, shall fall in the protection scope of this application.
It should be noted that when element is referred to as " being set to " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
Any and all combinations of relevant Listed Items.
As shown in Figure 1, the present invention provides a kind of casing patching section pressure-bearing characterization processes tubing string, which includes：Casing 1,
Oil pipe 2, the first packer 4, the second packer 5, guiding device 6 and bleeder 7.1 inner wall of casing has subsidy section 11.Oil
Pipe 2 is set in described sleeve pipe 1, and forms annular space 3 with described sleeve pipe 1.First packer 4 is arranged in described sleeve pipe 1
Subsidize the top of section 11.Second packer 5 can be by the subsidy section 11 of described sleeve pipe 1, and the subsidy section in described sleeve pipe 1 is arranged
11 lower section.Guiding device 6 connects on the oil pipe 2, and corresponding with the position of subsidy section 11 of described sleeve pipe 1, described to lead
Flowing device 6 has at least two working conditions, when the guiding device 6 is located at the first working condition, 2 inside of the oil pipe and institute
Annular space 3 is stated to be isolated, when the guiding device 6 is located at the second working condition, 2 inside of the oil pipe and the annular space
3 are connected.Bleeder 7 is connected to the end of the oil pipe 2, for releasing the fluid in the oil pipe 2.
In the present embodiment, casing 1 has subsidy section 11 (being subsidy section 11 after casing damage repairing).Oil pipe 2 is arranged
Annular space 3 is formed in casing 1, and with casing 1.
First packer 4 can be set in the annular space 3 above the subsidy section 11 of casing 1, which can
Think Y521 type anchoring packers.Packer anchor watt protrusion when pushing high, can be anchored on casing 1, playing prevents pipe
The effect that column is wriggled has and holds pushing ability height, the advantages of preventing string creep, increase mating packer sealing reliability.
Second packer 5 can set the ring below the subsidy section 11 of casing 1 by the subsidy section 11 of described sleeve pipe 1
In shape space 3.Second packer 5 can be that Y341 types cross set change packer.The packer passes through the subsidy section of casing 1
After 11, oil sets annular space 3 can be effectively sealed.The packer sealing coefficient is big, and bearing capacity is high, but since packing element is expanded
Greatly, there may be solution packing elements of being honored as a queen to spring back insufficient problem for part well.
Guiding device 6 can be connected on the oil pipe 2, and can be opposite with the position of subsidy section 11 of described sleeve pipe 1
It answers, more preferably to detect the bearing capacity of the subsidy section 11 of casing 1.The guiding device 6 has at least two working conditions, described
When guiding device 6 is located at the first working condition, 2 inside of the oil pipe is isolated with the annular space 3, the guiding device 6
When positioned at the second working condition, 2 inside of the oil pipe is connected with the annular space 3.
Specifically, as shown in Fig. 2, the guiding device 6 includes：Shell 61, flow-guiding channel 62, deflector hole 63 and sliding sleeve
64.The shell 61 extends along longitudinally, and has upper port 611 and lower port 612, can be offered in the shell 61
Chamber 613, the chamber 613 are connected with the upper port 611, are isolated with the lower port 612.Flow-guiding channel 62 can edge
The longitudinally of the shell 61 is opened in the shell 61, and the flow-guiding channel 62 is isolated with the chamber 613, and with
The upper port 611 and the lower port 612 are conducted, and are led so that fluid can be flowed through by the upper port 611 of guiding device 6
Circulation road 62 to lower port 612 is discharged.Deflector hole 63 is typically opening through the side wall of the shell 61, and is led with 613 phase of the chamber
It is logical, it is isolated with the flow-guiding channel 62.Sliding sleeve 64 is located in the chamber 613, and is fixed in the water conservancy diversion by pin 65
The top in hole 63, the sliding sleeve 64 can be tightly connected with the shell 61 by sealing ring.
The guiding device 6 is arranged between the first packer 4 and the second packer 5, is set in the first packer 4 and finishes it
Afterwards, continue to suppress into oil pipe 2, the fluid in oil pipe 2 can flow through flow-guiding channel 62 by the upper port 611 of guiding device 6
After being discharged to lower port 612, the second packer 5 is set, after waiting for that the second packer 5 sets completion, is then beaten into oil pipe 2
Pressure, fluid can compress the sliding sleeve 64 in chamber 613 at this time, and when pressure is sufficiently large, the pin 65 of sliding sleeve 64 is cut by pressure, sliding
Set 64 slides to the bottom of chamber 613, exposes deflector hole 63, and fluid can be flow to by deflector hole 63 in oil sets annular space 3.
Bleeder 7 can usually be connected to the end of oil pipe 2, for releasing the fluid in the oil pipe 2.Preferably,
The bleeder 7 can be draw-ring type bleeder, after the subsidy section 11 for examining casing 1 terminates, tripping in can be taken out in oil pipe 2
Beam hanger (not shown) pulls open draw-ring type bleeder, and the fluid on 5 top of the second packer is made to be discharged into pit shaft, recurrence pipe
Column.
In addition, 7 end of the bleeder can also be connected with screen casing 8, the end of the screen casing 8 can also be connected with silk plug
9 or starting taper, the silk plug 9 or starting taper can play the role of guiding tubing string.
In addition, the present invention also provides a kind of process of casing patching section pressure-bearing characterization processes tubing string, this method includes
Following steps：
S1：Described sleeve pipe subsidy section pressure-bearing characterization processes tubing string is lowered into target location, the first packer 4 of rotation makes it
It sets.
S2：After waiting for that first packer 4 is set, the fluid of the first predetermined pressure is squeezed into the oil pipe 2, is made
Second packer 5 is set.
S3：After waiting for that second packer 5 is set, continue the stream for squeezing into the second predetermined pressure into the oil pipe 2
Body makes the chamber 613 be connected with the annular space 3, the fluid until the pin 65 of the guiding device 6 is cut
It flows into the annular space 3.
S4：Continue to squeeze into third predetermined pressure or more into the oil pipe 2, the voltage stabilizing predetermined time；If pressure does not drop,
Casing patching section 11 is qualified；If pressure declines, casing patching section 11 is unqualified.
Specifically, can be by a whole set of tubing string down toward projected depth, first rotation sets Y521 packers, then by pump truck,
Tank car group coordinates, and suppresses voltage stabilizing 2 minutes after 16MPa, sets Y341 packers.Then can continue to suppress to 18MPa, opening is led
Device 6 is flowed, so that the deflector hole 63 that the fluid in oil pipe 2 passes through guiding device 6 is flow in oil sets annular space 3, at this time pressure gauge
Of short duration pressure release can be shown.It is possible to further being required according to measure, suppress to 15MPa or more, voltage stabilizing 30 minutes, pressure
It does not drop, is considered as 1 qualification of casing, if pressure surely incessantly declines, the subsidy section 11 for being considered as casing 1 is unqualified.
After waiting for that described sleeve pipe subsidy section 11 detects, into the oil pipe 2, tripping in sucker rod proposes the bleeder 7
Tubing string, and then the fluid on 5 top of the second packer is discharged into pit shaft lift pipe string again.
More than 20 well of field conduct, construction success rate are more than 90%, by this design of string pipe, can effectively realize casing patching
Section detection, and can solve the problems, such as lift pipe string overflow.
It should be noted that casing provided in this embodiment, oil pipe, pin etc. can select any appropriate existing structure
It makes.To be clearly briefly described the technical solution that the present embodiment is provided, no longer above-mentioned part will be repeated herein, explanation
Book attached drawing has also carried out corresponding simplification.However, it should be understood that therefore the present embodiment is not restricted in range.
Herein cited any digital value all include between lower limiting value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These are only intended to the example clearly expressed, it is believed that the numerical value enumerated between minimum and peak is possible to
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all ranges all include all numbers between endpoint and endpoint.It is used together with range
" about " or " approximation " be suitable for two endpoints of the range.Thus, " about 20 to 30 " are intended to covering " about 20 to about
30 ", including at least the endpoint indicated.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.The term " substantially by ... constitute " for describing combination should include identified element, ingredient, component or step and reality
Other elements, ingredient, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, component
Or the embodiment that step is constituted.Here by using term " can with ", it is intended to illustrate that " can with " includes described any
Attribute is all optional.
Multiple element, ingredient, component or step can be provided by single integrated component, ingredient, component or step.Optionally
Ground, single integrated component, ingredient, component or step can be divided into multiple element, ingredient, component or the step of separation.It is used for
The open "a" or "an" for describing element, ingredient, component or step is not said to exclude other elements, ingredient, component
Or step.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except the example provided all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined with reference to foregoing description, but should with reference to preceding claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of profit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
Apply for a part for theme.
Claims (10)
1. a kind of casing patching section pressure-bearing characterization processes tubing string, which is characterized in that including：
Casing, inner wall have subsidy section；
Oil pipe is set in described sleeve pipe, and forms annular space with described sleeve pipe；
The top that section is subsidized in described sleeve pipe is arranged in first packer；
Second packer can subsidize section by described sleeve pipe, and the lower section for subsidizing section in described sleeve pipe is arranged；
Guiding device is connected on the oil pipe, and corresponding with the described sleeve pipe subsidy position of section, the guiding device tool
There are at least two working conditions, when the guiding device is located at the first working condition, the oil pipe inside and the annular space
It is isolated, when the guiding device is located at the second working condition, is connected with the annular space inside the oil pipe；
Bleeder is connected to the end of the oil pipe, for releasing the fluid in the oil pipe.
2. casing patching section pressure-bearing characterization processes tubing string according to claim 1, which is characterized in that first packer
For Y521 type anchoring packers.
3. casing patching section pressure-bearing characterization processes tubing string according to claim 1, which is characterized in that second packer
For Y341 type packers.
4. casing patching section pressure-bearing characterization processes tubing string according to claim 1, which is characterized in that the guiding device packet
It includes：
Shell, the shell extend along longitudinally, and have upper port and lower port, offer chamber in the shell, institute
It states chamber with the upper port to be connected, be isolated with the lower port；
Flow-guiding channel, the longitudinally along the shell are opened in the shell, the flow-guiding channel and the chamber phase
Isolation, and be conducted with the upper port and the lower port；
Deflector hole, runs through the side wall of the shell, and is conducted with the chamber, is isolated with the flow-guiding channel；
Sliding sleeve is located in the chamber, and the top of the deflector hole is fixed in by pin, the sliding sleeve and the shell
It is tightly connected.
5. casing patching section pressure-bearing characterization processes tubing string according to claim 1, which is characterized in that the bleeder is to draw
Ring type bleeder.
6. casing patching section pressure-bearing characterization processes tubing string according to claim 1, which is characterized in that the bleeder end
It is connected with screen casing.
7. casing patching section pressure-bearing characterization processes tubing string according to claim 6, which is characterized in that the end of the screen casing
It is connected with silk plug or starting taper.
8. a kind of process for subsidizing section pressure-bearing characterization processes tubing string according to any one of claim 1 to 7 described sleeve pipe,
It is characterized in that, includes the following steps：
Described sleeve pipe subsidy section pressure-bearing characterization processes tubing string is lowered into target location, the first packer of rotation makes it set；
After waiting for first packer setting, the fluid of the first predetermined pressure is squeezed into the oil pipe, makes described second
Packer setting；
After waiting for second packer setting, continue the fluid for squeezing into the second predetermined pressure into the oil pipe, until institute
The pin for stating guiding device is cut, and the chamber is made to be connected with the annular space, and the fluid flows into the annular space
In；
Continue to squeeze into third predetermined pressure or more into the oil pipe, the voltage stabilizing predetermined time；If pressure does not drop, casing patching
Duan Hege；If pressure declines, casing patching section is unqualified.
9. the process of casing patching section pressure-bearing characterization processes tubing string according to claim 8, which is characterized in that also wrap
Include following steps：
After waiting for described sleeve pipe subsidy section detection, into the oil pipe, the bleeder is proposed tubing string by tripping in sucker rod, into
And the fluid on second packer top is discharged into pit shaft lift pipe string again.
10. the process of casing patching section pressure-bearing characterization processes tubing string according to claim 9, which is characterized in that institute
It is 16MPa to state the first predetermined pressure, and second predetermined pressure is 18MPa, and the third predetermined pressure is 15MPa, described pre-
Fix time is 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810467726.4A CN108643888A (en) | 2018-05-16 | 2018-05-16 | Technical pipe column and method for detecting pressure bearing of casing patching section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810467726.4A CN108643888A (en) | 2018-05-16 | 2018-05-16 | Technical pipe column and method for detecting pressure bearing of casing patching section |
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| CN108643888A true CN108643888A (en) | 2018-10-12 |
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| CN201810467726.4A Pending CN108643888A (en) | 2018-05-16 | 2018-05-16 | Technical pipe column and method for detecting pressure bearing of casing patching section |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206505A (en) * | 2019-05-16 | 2019-09-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Old well reconstruction method for dragging and fracturing coiled tubing by patching and plugging |
| CN111677480A (en) * | 2020-06-04 | 2020-09-18 | 大庆油田有限责任公司 | Double-acting control valve for casing patching |
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