CN112049603B - Method for packing outer annular space of sieve tube - Google Patents
Method for packing outer annular space of sieve tube Download PDFInfo
- Publication number
- CN112049603B CN112049603B CN202010958508.8A CN202010958508A CN112049603B CN 112049603 B CN112049603 B CN 112049603B CN 202010958508 A CN202010958508 A CN 202010958508A CN 112049603 B CN112049603 B CN 112049603B
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- cutting
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- pipe column
- packing
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- 238000012856 packing Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 47
- 239000004576 sand Substances 0.000 claims abstract description 29
- 239000010410 layer Substances 0.000 claims abstract description 28
- 239000011229 interlayer Substances 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 28
- 210000002445 nipple Anatomy 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
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)
- Earth Drilling (AREA)
Abstract
A method for packing the outer annular space of a sieve tube adopts the mode of packing the annular space between the sieve tube and a sleeve at the position of a small interlayer in a sand prevention section, and specifically comprises the following steps: firstly, the method comprises the following steps: putting a cutting pipe column into the shaft, wherein the cutting pipe column contains a cutting tool, and when the cutting tool in the cutting pipe column reaches a designed position, the annular cutting is carried out on the screen pipe section at the designed cutting position; II, secondly: putting forward a cutting pipe column; thirdly, the method comprises the following steps: cleaning a shaft; fourthly, the method comprises the following steps: and in the cutting section, an annular packing pipe column is put in to realize annular packing between the sieve pipe and the casing pipe. The invention can achieve the purpose of fine separate layer water injection or oil extraction without lifting the original well sand control pipe column to pack and separate small intervals; in addition, the production period is greatly shortened, the production cost is reduced, and the working efficiency is improved.
Description
Technical Field
The invention belongs to the field of offshore oil engineering, and particularly relates to a method for packing an outer annular space of a sieve tube.
Background
At present, in a Bohai sea oilfield, most wells adopt a sieve tube arranged in a casing tube to carry out sand control completion, the sand control section is generally divided into 3-6 sections, an isolation packer is adopted between the sand control section and the sand control section for separation, and then a sectional water injection or oil production pipe column is arranged in the Bohai sea oilfield subsequently. However, since there are several small layers in each sand control section, in order to further subdivide the development of the formation to increase the recovery of the oil field, it is necessary to first further pack the small layers in the sand control section, and then to perform further fine zonal injection or recovery.
The existing packing of small layers of a sand prevention section generally adopts a method of setting an isolation packer at the position of a separation layer between the small layers; however, in old wells, since sand control completion is performed, it is necessary to lift all the screens of the sand control section out of the wellbore and then run isolation packers where isolation is required, which is equivalent to re-sand control completion, resulting in higher cost and time consumption.
Disclosure of Invention
The invention aims to provide a method for packing the outer annular space of a sieve tube so as to solve the technical problem that the sand needs to be newly prevented in a layering section.
In order to achieve the purpose, the specific technical scheme of the method for packing the outer annular space of the sieve tube is as follows:
a method for packing the outer annular space of a sieve tube adopts the mode of packing the annular space between the sieve tube and a sleeve at the position of a small interlayer in a sand prevention section, and specifically comprises the following steps:
the first step is as follows: putting a cutting pipe column into the shaft, wherein the cutting pipe column contains a cutting tool, and when the cutting tool in the cutting pipe column reaches a designed position, the annular cutting is carried out on the screen pipe section at the designed cutting position;
the second step: putting forward a cutting pipe column;
the third step: cleaning a shaft;
the fourth step: and in the cutting section, an annular packing string is put in to realize annular packing between the sieve tube and the casing.
Further, the design position is a position of a partition layer between the small layers.
Further, the cut screen sections correspond to the location of the interlayers between the sub-layers.
Furthermore, the annular packing string is formed by connecting a first isolation packer, a first oil pipe nipple, a second isolation packer, a second oil pipe nipple and a hanging packer from bottom to top in sequence.
Further, the interlayer exists in the stratum, wherein the stratum is divided into an upper layer and a lower layer; a casing is arranged in the stratum, a sand prevention completion pipe column is arranged in the casing, and a sieve pipe is arranged on the sand prevention completion pipe column; the upper end and the lower end of the sieve tube are respectively provided with a first well completion isolation packer and a second well completion isolation packer for sand control well completion.
Further, the first isolation packer is positioned at the screen pipe cutting section and sealed with the inner wall of the casing; the second isolation packer is located in the lower half of the screen pipe and sealed with the inner wall of the lower half of the screen pipe.
The method for packing the outer annular space of the sieve tube has the following advantages:
the invention can achieve the purpose of fine separate layer water injection or oil extraction without lifting the original well sand control pipe column for packing among small intervals; in addition, the production period is greatly shortened, the production cost is reduced, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a section of a cased-hole screen pipe sand control completion string according to the present invention;
FIG. 2 is a schematic structural view of a section of a sand control completion string after the screen pipe of the present invention has been cut;
FIG. 3 is a schematic representation of an annulus packing string according to the present invention.
The symbols in the figure illustrate:
1. a screen pipe; 2. a sleeve; 3.1, a first well completion isolation packer; 3.2, a second well completion isolation packer; 4. an earth formation; 4.1, an upper layer; 4.2, lower layer; 5. an interlayer; 6. hanging a packer; 7. a first tubing nipple; 8. a first isolation packer; 9. a second isolation packer.
Detailed Description
For a better understanding of the purpose, structure and function of the present invention, a method for packing the outer annulus of a screen will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention comprises: a stratum 4 and an interlayer 5 existing in the stratum 4, wherein the stratum 4 is divided into an upper layer 4.1 and a lower layer 4.2;
a casing 2 is arranged in the stratum 4, a sand control completion pipe column is arranged in the casing 2, a sieve pipe 1 is arranged on the sand control completion pipe column, and a first completion isolation packer 3.1 and a second completion isolation packer 3.2 are respectively arranged at the upper end and the lower end of the sieve pipe 1 so as to perform sand control completion;
as shown in fig. 2, first, a cutting string is put into the sand control completion string, and then the screen pipe 1 is cut into two sections by using a cutting tool, wherein the cutting section of the screen pipe 1 corresponds to the position of the interlayer 5, and the cutting length of the cutting section is not greater than the length of the interlayer 5. After cutting, lifting the cutting pipe column out of the shaft, and then cleaning the shaft;
as shown in fig. 3, the cutting pipe column after annular packing is lowered to a set position, and then a hanging packer 6 is installed in the cutting pipe column, wherein the hanging packer 6 is used for hanging the annular packing pipe column; the suspension packer 6 is positioned in the upper half section of the sieve tube 1 and is sealed with the inner wall of the upper half section of the sieve tube 1;
the first isolation packer 8 is located at the cutting section of the screen pipe and sealed with the inner wall of the casing 2, and the second isolation packer 9 is located in the lower half section of the screen pipe 1 and sealed with the inner wall of the lower half section of the screen pipe 1.
The invention adopts the mode of sealing the positions of the interlayer between the small layers in the sand prevention section and the annulus between the sieve tube and the sleeve, and particularly adopts the following steps:
the first step is as follows: in the wellbore, a cutting string is run, which contains a cutting tool, which when the cutting tool in the cutting string reaches a design position, i.e.: the position of the interlayer between the small layers; carrying out annular cutting on the sieve tube 1 section at the designed cutting position;
the cut screen sections correspond to the spacer layer locations between the sub-layers.
The second step is that: putting forward a cutting pipe column;
the third step: cleaning a shaft;
the fourth step: in the cutting section, an annular packing pipe column is put in to realize annular packing between the sieve tube 1 and the casing 2;
the annular packing string is formed by sequentially connecting a first isolation packer 8, a first oil pipe nipple 7, a second isolation packer 9, a second oil pipe nipple and a hanging packer 6 from bottom to top.
The lengths of the first oil pipe nipple 7 and the second oil pipe nipple can be selected according to requirements.
The above-mentioned spacer layer 5 is present in the ground formation 4, wherein the ground formation 4 is divided into two small layers, an upper layer 4.1 and a lower layer 4.2.
In the description of the present invention, it is to be understood that "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The screen pipe, the casing pipe and the well completion isolation packer are arranged; the suspended packer, the tubing nipple and the isolation packer are the prior art, and the unexplained technology is the prior art, so that the repeated description is omitted.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (1)
1. A method for packing the outer annular space of a sieve tube is characterized in that the method for packing the annular space between the sieve tube and a sleeve by adopting the position of a small interlayer in a sand prevention section and the annular space between the sieve tube and the sleeve specifically comprises the following steps:
the first step is as follows: a cutting pipe column is arranged in a shaft, the cutting pipe column comprises a cutting tool, and when the cutting tool in the cutting pipe column reaches a designed position, the screen pipe section at the designed cutting position is subjected to annular cutting;
the second step is that: lifting out a cutting pipe column;
the third step: cleaning a shaft;
the fourth step: in the cutting section, an annular packing pipe column is put in to realize annular packing between the sieve pipe and the casing pipe;
the design position is the position of an interlayer between the small layers; the annular packing string is formed by sequentially connecting a first isolation packer, a first oil pipe nipple, a second isolation packer, a second oil pipe nipple and a hanging packer from bottom to top;
the cut screen pipe section corresponds to the position of the interlayer between the small layers; the interlayer exists in the stratum, wherein the stratum is divided into an upper layer and a lower layer; a casing is arranged in the stratum, a sand prevention completion pipe column is arranged in the casing, and a sieve pipe is arranged on the sand prevention completion pipe column; the upper end and the lower end of the sieve tube are respectively provided with a first well completion isolation packer and a second well completion isolation packer for sand control well completion;
the first isolation packer is positioned at the screen pipe cutting section and sealed with the inner wall of the casing; the second isolation packer is located in the lower half section of the sieve tube and is sealed with the inner wall of the lower half section of the sieve tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010958508.8A CN112049603B (en) | 2020-09-14 | 2020-09-14 | Method for packing outer annular space of sieve tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010958508.8A CN112049603B (en) | 2020-09-14 | 2020-09-14 | Method for packing outer annular space of sieve tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112049603A CN112049603A (en) | 2020-12-08 |
| CN112049603B true CN112049603B (en) | 2022-11-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010958508.8A Active CN112049603B (en) | 2020-09-14 | 2020-09-14 | Method for packing outer annular space of sieve tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112049603B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7048048B2 (en) * | 2003-06-26 | 2006-05-23 | Halliburton Energy Services, Inc. | Expandable sand control screen and method for use of same |
| CN101514621B (en) * | 2008-02-21 | 2012-10-31 | 普拉德研究及开发股份有限公司 | Sand prevention in multiple regions without a drill |
| CN201908614U (en) * | 2011-01-30 | 2011-07-27 | 毛元红 | Packer for long rubber tube |
| CN102619486B (en) * | 2012-04-11 | 2014-09-10 | 中国海洋石油总公司 | Sand washing type fishing technology for sand prevention pipe string |
| CN203603867U (en) * | 2013-11-29 | 2014-05-21 | 中国石油化工股份有限公司 | Low-shear layered sand prevention double-pipe layered polymer injection process pipe column |
| CN206309359U (en) * | 2016-11-18 | 2017-07-07 | 中国石油天然气股份有限公司 | Small interlayer water plugging pipe column |
| CN107269245B (en) * | 2017-05-24 | 2019-06-18 | 中国海洋石油总公司 | A method of it is insulated again for seperated layer water injection/oil recovery sand control section substratum |
| CN210714547U (en) * | 2019-07-25 | 2020-06-09 | 中国石油天然气股份有限公司 | Screen pipe cutting and fishing pipe column |
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2020
- 2020-09-14 CN CN202010958508.8A patent/CN112049603B/en active Active
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| Publication number | Publication date |
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| CN112049603A (en) | 2020-12-08 |
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