CN209539334U - The cased hole completion structure of external packer of pipe under a kind of segmented - Google Patents
The cased hole completion structure of external packer of pipe under a kind of segmented Download PDFInfo
- Publication number
- CN209539334U CN209539334U CN201920247086.6U CN201920247086U CN209539334U CN 209539334 U CN209539334 U CN 209539334U CN 201920247086 U CN201920247086 U CN 201920247086U CN 209539334 U CN209539334 U CN 209539334U
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- CN
- China
- Prior art keywords
- pipe
- external packer
- centralizer
- segmented
- production string
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Abstract
The utility model provides a kind of cased hole completion structure of external packer of pipe under segmented, including the surface pipe being vertically set in oil well, production string is coaxially arranged in the surface pipe, the head of the production string is passed down through the surface pipe and extends to the oil well lower end, the outer wall of the surface pipe is equipped with centralizer A and two external packer of pipe A, and the centralizer A is between the two external packer of pipe A；The production string in the oil well is externally provided with external packer of pipe B and centralizer B, and the lower end of the production string is equipped with the block ring for preventing cement slurry from returning.The cased hole completion structure of external packer of pipe under the utility model segmented, compact-sized, easy to operate, operating cost and difficulty is low, success rate and highly-safe and cementing quality are good.
Description
Technical field
The utility model relates to a kind of oil drilling completion technique, in particular to the set of external packer of pipe under a kind of segmented
Pipe completion structure.
Background technique
Casing and cementing construction period causes leakage and casing job lack of standardization, traps since casing cause for quality occurs
Pipe operation is lack of standardization to cause the failure of underground detention ring, cementing operation not to fail according to design and construction program, underground geology, well cementation,
It often results in cement and returns high inadequate phenomenon, and this phenomenon is more universal, causes to the production cycle of oil-water well irretrievable
Loss.
High inadequate phenomenon is returned for this cement, sole mode is exactly to realize secondary cementing technology.Present most of oil
Field in the process of development on be accomplished that annular space inject cement, until cement is filled until, although and this remedial measure construction
Process is simple, but the poor effect remedied on specific block and certain degree, since cemented method is secondary
Circulation canal is not formed during well cementing operation, by the pressure limit in underground airtight space, it is inadequate to return high level, unites according to experience
It counts, under the pump pressure of general 20mpa, can only at most inject 200m cement or so.
Returning high inadequate remedial measure for cement on another oil field is well-case perforating cement squeeze work, however this side
Formula has 3 points of fatal defects: 1. cement squeeze works have certain requirement to cement slurry property, it is necessary to which making cement pulp is tested, cement
The performances such as thickening time and dehydration meet construction requirement.If cement slurry property is not up to standard, cement squeeze work failure centainly will cause.
And usually we in cement return high inadequate position in the upper semisection of casing programme, the cement slurry property of this half section requirement is usual
It is light weight cement, cement slurry property is not necessarily to too high；2. tubing string once is lived to be difficult to handle admittedly with casing by cement, may
Oil well engineering is caused to be scrapped.3. due to cement squeeze work, the equipment for not being similar to detention ring causes during lift pipe string
Situations such as being frequently encountered suction causes cement squeeze work to fail.Based on above 3 reasons, although cement squeeze work is low close
In the case that degree returns height not enough, circulation canal is established, but task difficulty increases, operating cost is higher.
Utility model content
[1] technical problems to be solved
The technical problem to be solved by the present invention is to provide a kind of compact-sized, easy to operate, operating cost and difficulty
The cased hole completion structure of external packer of pipe under low, success rate and the good segmented of highly-safe and cementing quality.
[2] technical solution solved the problems, such as
The utility model provides a kind of cased hole completion structure of external packer of pipe under segmented, including is vertically set on oil well
Surface pipe 3 in 8 is coaxially arranged with production string 4 in the surface pipe 3, and the head of the production string is passed down through
The surface pipe simultaneously extends to the oil well lower end, and the outer wall of the surface pipe is equipped with centralizer A5 and the outer packing of two pipes
Device A2, the centralizer A is between the two external packer of pipe A2；The production string in the oil well is externally provided with
External packer of pipe B9 and centralizer B10, the lower end of the production string are equipped with the block ring for preventing cement slurry from returning
7。
Further, the lower end outer wall of the production string is equipped with centralizer C11.
Further, it is from top to bottom staggeredly equipped with outside the pipe and insulates outside the production string in the oil well
The device B9 and centralizer B10.
Further, there are three the external packer of pipe B9 and centralizer B10 is all provided with.
Further, the external packer of pipe A2 of centralizer A5 to two is equidistant.
Further, the external packer of pipe B9 is placed equidistant with along the axis direction of the production string.
Further, the centralizer B10 is placed equidistant with along the axis direction of the production string.
[3] beneficial effect
The cased hole completion structure of external packer of pipe under the utility model segmented, in the case where returning high inadequate, Neng Gouti
For the circulation canal of secondary well cementation, therefore it can reach during secondary well cementing operation and return the maximized purpose of high level；Safety
Property and success rate it is high, due to rising outside pipe, encapsulation technique is mature, and external packer of pipe rises to be honored as a queen and is able to achieve the purpose of detention ring, only
Will be according to design requirement operation, the completion structure safety and success rate are higher；Cement can be remedied and return high inadequate problem, energy
The well cementing of cement of low-density is enough used, and does not influence cementing quality, the separation of output layer and water layer is realized, is greatly saved secondary
The production cost of well cementation；The cased hole completion structure of external packer of pipe under the utility model segmented, compact-sized, easy to operate,
Operating cost and difficulty is low, success rate and highly-safe and cementing quality are good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the cased hole completion structure of external packer of pipe under the utility model segmented.
Specific embodiment
With reference to the accompanying drawing, the utility model embodiment is discussed in detail.
Refering to fig. 1, the utility model provides a kind of cased hole completion structure of external packer of pipe under segmented, including vertically sets
The surface pipe 3 in oil well 8 is set, the upper end of the surface pipe is fixed at well head, and oil reservoir set is provided in surface pipe 3
Pipe 4, the production string and surface pipe are coaxially disposed, and the head of production string is passed down through surface pipe and extends under oil well
End is equipped with centralizer A5 in the outer wall of surface pipe and two external packer of pipe A2, centralizer A is located at two external packer of pipe A2
Between, and centralizer A5 to the two external packer of pipe A2 is equidistant；In oil well (and being located at outside surface pipe)
Production string is externally provided with external packer of pipe B9 and centralizer B10, and external packer of pipe B9 and centralizer B10 are from top to bottom staggeredly set
It sets, i.e., from top to bottom sets gradually external packer of pipe B9-- centralizer B10-- external packer of pipe B9-- centralizer B10-- pipe covering
Every device B9-- centralizer B10......., the external packer of pipe B9 positioned at the top is close to surface pipe；In the present embodiment, pipe is outer
There are three packer B9 and centralizer B10 is all provided with, in order to reach preferably well cementation effect, external packer of pipe B9 is along production string
Axis direction is placed equidistant with, and centralizer B10 is also placed equidistant with along the axis direction of production string, at the lower end end of production string
Portion sets block ring 7, which is located at shaft bottom, for preventing cement slurry from returning, while can be reduced setting of casing derrick load, in oil
The lower end outer wall of layer casing is equipped with centralizer C11.
The cased hole completion structure of external packer of pipe under the utility model segmented, in the case where returning high inadequate, Neng Gouti
For the circulation canal of secondary well cementation, therefore it can reach during secondary well cementing operation and return the maximized purpose of high level；Safety
Property and success rate it is high, due to rising outside pipe, encapsulation technique is mature, and external packer of pipe rises to be honored as a queen and is able to achieve the purpose of detention ring, only
Will be according to design requirement operation, the completion structure safety and success rate are higher；Cement can be remedied and return high inadequate problem, energy
The well cementing of cement of low-density is enough used, and does not influence cementing quality, the separation of output layer and water layer is realized, is greatly saved secondary
The production cost of well cementation；The cased hole completion structure of external packer of pipe under the utility model segmented, compact-sized, easy to operate,
Operating cost and difficulty is low, success rate and highly-safe and cementing quality are good.
The course of work of the cased hole completion structure of external packer of pipe is as follows under the utility model segmented:
Tripping in external packer of pipe is segmented during lower completion tubular column, finally under entire bunch tube surveyed in a well cementing operation
After well operations, if detecting, cement returns high inadequate situation, and the water shutoff mud that rises returns high nearest external packer of pipe, this external packer of pipe
High inadequate upper end need to be being returned, guarantee to realize circulation canal.The tripping in bridge plug below the sealing tube external packer that rises realizes that circulation is logical
Road guarantees that secondary cementing concrete returns high and sealing quality, after the completion of secondary well cementing operation, gets through bridge plug, realizes entire secondary
Well cementing operation.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (7)
1. the cased hole completion structure of external packer of pipe under a kind of segmented, it is characterised in that: including being vertically set in oil well (8)
Surface pipe (3), is coaxially arranged with production string (4) in the surface pipe (3), the head of the production string is worn downwards
It crosses the surface pipe and extends to the oil well lower end, the outer wall of the surface pipe is equipped with centralizer A (5) and two pipes are outer
Packer A (2), the centralizer A are between the two external packer of pipe A (2)；The oil reservoir set in the oil well
Pipe is externally provided with external packer of pipe B (9) and centralizer B (10), and the lower end of the production string is equipped with for preventing cement slurry
The block ring (7) returned.
2. the cased hole completion structure of external packer of pipe under segmented as described in claim 1, it is characterised in that: the oil reservoir set
The lower end outer wall of pipe is equipped with centralizer C (11).
3. the cased hole completion structure of external packer of pipe under segmented as described in claim 1, it is characterised in that: be located at the oil
The external packer of pipe B (9) and the centralizer B (10) are from top to bottom staggeredly equipped with outside the production string in well.
4. the cased hole completion structure of external packer of pipe under segmented as claimed in claim 3, it is characterised in that: the pipe covering
There are three being all provided with every device B (9) and the centralizer B (10).
5. the cased hole completion structure of external packer of pipe under segmented as described in claim 1, it is characterised in that: the centralizer
A's (5) to two external packer of pipe A (2) is equidistant.
6. the cased hole completion structure of external packer of pipe under segmented as described in claim 1, it is characterised in that: the pipe covering
It is placed equidistant with every device B (9) along the axis direction of the production string.
7. the cased hole completion structure of external packer of pipe under segmented as described in claim 1, it is characterised in that: the centralizer
B (10) is placed equidistant with along the axis direction of the production string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247086.6U CN209539334U (en) | 2019-02-27 | 2019-02-27 | The cased hole completion structure of external packer of pipe under a kind of segmented |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247086.6U CN209539334U (en) | 2019-02-27 | 2019-02-27 | The cased hole completion structure of external packer of pipe under a kind of segmented |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209539334U true CN209539334U (en) | 2019-10-25 |
Family
ID=68274263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920247086.6U Expired - Fee Related CN209539334U (en) | 2019-02-27 | 2019-02-27 | The cased hole completion structure of external packer of pipe under a kind of segmented |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209539334U (en) |
-
2019
- 2019-02-27 CN CN201920247086.6U patent/CN209539334U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191025 Termination date: 20200227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |