CN113818844B - Completion pipe string structure for ultra-short radius well - Google Patents
Completion pipe string structure for ultra-short radius well Download PDFInfo
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- CN113818844B CN113818844B CN202111089491.8A CN202111089491A CN113818844B CN 113818844 B CN113818844 B CN 113818844B CN 202111089491 A CN202111089491 A CN 202111089491A CN 113818844 B CN113818844 B CN 113818844B
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- 238000011010 flushing procedure Methods 0.000 claims abstract description 64
- 239000004576 sand Substances 0.000 claims abstract description 29
- 238000012856 packing Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000009987 spinning 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides a well completion pipe column structure for an ultra-short radius well, which comprises a filling tool, a flexible screen pipe section and guide shoes, wherein the flexible screen pipe section comprises a plurality of sand control flexible screen pipe units which are connected end to end, each sand control flexible screen pipe unit comprises a universal connector, a universal base pipe which is connected with the universal connector in a universal mode, a filter sleeve which is sleeved on the periphery of the universal base pipe, and a universal flushing pipe which is arranged inside the universal base pipe and is connected with the universal base pipe in a coaxial mode, the universal connectors of two adjacent sand control flexible screen pipe units are connected with the universal base pipe, and the universal flushing pipes of the two adjacent sand control flexible screen pipe units are connected with each other. The invention solves the problem that the inside of the existing flexible screen pipe cannot be well lowered into the flushing pipe when the completion operation of the ultra-short radius multi-branch well is performed, and the pipeline has good flexibility, is internally provided with the flushing pipe, can extend into a special drilling well with an ultra-short radius, and does not need to be lowered into the flushing pipe additionally.
Description
Technical Field
The invention relates to the technical field of sand control completion, in particular to a completion pipe column structure for an ultra-short radius well.
Background
According to the difference of curvature radius of the well bore, radial horizontal wells are divided into long-radius wells, medium-radius wells, short-radius wells and ultra-short-radius wells, the shorter the curvature radius is, the more difficult the well is to drill, and the ultra-short-radius side drilling technology for simultaneously producing multiple layers in the same well is the production increasing means with higher economical efficiency in petroleum exploitation nowadays. The ultra-short half-curvature radius drilling technology is suitable for the utilization of residual oil in an oil field due to the characteristics of low cost, short operation period and simple equipment requirements, but the ultra-short half-curvature radius drilling technology does not have a matched well completion technology and a well completion sand prevention pipe column structure, and the conventional well completion technology cannot be applied to a special well track (ultra-short half-curvature radius drilling), so that the application of the technology is limited to a low-permeability reservoir, and the production life and the efficiency of a well are low.
The Chinese patent document with the publication number of CN110984922A discloses a multi-branch ultra-short curvature radius wellbore completion sand spinning tubular column structure, adopts a mode of combining a second branch tubular column and a first branch tubular column (a third branch tubular column, a fourth branch tubular column and the like), achieves the aim of multi-branch combined production, greatly improves the completion efficiency and the subsequent oil extraction efficiency, and simultaneously improves the wellbore production life.
However, for special drilling such as loose sandstone oil reservoirs, when sand prevention filling is performed after a sand filtering pipe is hung, a flushing pipe needs to be put in, and because the bending radius of the flushing pipe cannot meet the requirement of the existing ultra-short radius multi-branch well, the inner part of the existing flexible screen pipe cannot be well put in the flushing pipe, so that the screen pipe and a well completion pipe column structure which can meet the requirement of the well hole with the ultra-short semi-curvature radius can be provided.
Disclosure of Invention
The invention aims to overcome the defect that the inside of the existing flexible screen pipe cannot well drop into a flushing pipe when the completion operation of an ultra-short radius multi-branch well is performed, and provides a completion pipe string structure for the ultra-short radius well. The pipeline has good flexibility, and the inside of the pipeline is provided with the flushing pipe, so that the pipeline can extend into a special drilling well with an ultra-short radius without additionally arranging the flushing pipe.
In order to solve the technical problems, the invention adopts the following technical scheme:
a well completion tubular column structure for ultrashort radius well, including filling tool, flexible screen pipe section and guide shoe, the one end and the filling tool of flexible screen pipe section are connected, the other end and the guide shoe of flexible screen pipe section are connected, still be equipped with the packer on the lateral wall of filling tool, flexible screen pipe section includes a plurality of end to end's sand control flexible screen pipe units, sand control flexible screen pipe unit includes the universal joint, universal base pipe with universal joint universal connection, the cover is established at universal base pipe outlying filter mantle, and locate the inside universal washpipe and with universal base pipe coaxial coupling's universal washpipe, the universal joint and the universal base pipe interconnect of two adjacent sand control flexible screen pipe units, the universal washpipe interconnect of two adjacent flexible screen pipe units.
Therefore, the flexible screen pipe section can be bent, and because the flexible pipeline is formed by splicing the sand control flexible screen pipe units which are connected end to end, the universal connector is rotationally connected with the universal base pipe, and the two adjacent sand control flexible screen pipe units can rotate in a certain angle to form a rotation angle; the sand control flexible screen pipe units are coaxially connected with the universal base pipe through the universal connectors, the universal flushing pipes can be connected with the universal base pipe in a rotating mode along with the spherical pipes, the screen pipes can extend into drilling wells with different bending degrees, and the universal flushing pipes can also be bent along with the external universal base pipe; therefore, when the well completion is carried out, the invention can directly carry out gravel packing operation by utilizing the self-contained flushing pipe without additionally arranging the flushing pipe in the traditional flexible screen pipe used for the ultra-short radius well.
Further, the flexible screen pipe section is connected with the filling tool through a first adapter, the first adapter comprises an upper joint and a flushing pipe joint, one end of the upper joint is in threaded connection with the filling tool, the other end of the upper joint is in threaded connection with the universal joint, and one end of the flushing pipe joint is in threaded connection with the filling tool, and the other end of the flushing pipe joint is in universal connection with the universal flushing pipe.
Further, an annular boss is arranged in the upper joint, and the flushing pipe joint penetrates through the annular boss and is fixedly connected with the annular boss through threads.
Further, the universal connector comprises a universal ball head rod, a back cap which is sleeved on the outer side wall of the universal ball head rod and is provided with an opening towards the ball head part of the universal ball head rod, the universal base pipe is positioned between the back cap and the ball head part of the universal ball head rod, the outer side wall of the universal end of the universal base pipe is connected with the inner side wall of the back cap, and the inner side wall of the universal end of the universal base pipe is in universal connection with the ball head part of the universal ball head rod. Therefore, the universal ball rod is inserted into the ball cavity of the universal end of the universal base pipe and is locked by the back cap, so that a connecting structure capable of rotating within a certain range is realized.
Further, one end of the universal flushing pipe is provided with a ball cavity, the other end of the universal flushing pipe is provided with a ball head matched with the ball cavity, and when two adjacent universal flushing pipes are connected, the adjacent ball cavities are in universal connection with the ball head. In this way, a connection structure which can rotate within a certain range can be realized between two adjacent universal flushing pipes.
Further, the center of the ball cavity of the universal flushing pipe is overlapped with the center of the ball head of the universal ball head rod, and the inner side of the ball head of the universal ball head rod is provided with a conical surface for lateral bending of the outer side wall of the ball cavity. Therefore, in the running process of the three-dimensional axis well hole, the universal flushing pipe can bend along with the movement of the base pipe, synchronous bending is achieved for the universal flushing pipe and the base pipe, and linkage synchronous running is achieved.
Further, the spherical cavity of the universal flushing pipe is bent at the single side of the ball head part of the universal ball head rod by 8-16 degrees
Further, the outer side wall of the universal flushing pipe is also provided with a centralizing table which is clamped on the inner wall of the universal base pipe.
Further, the guide shoe is connected with the sexual screen pipe section through a second connector, the second connector comprises a second universal ball head rod, a second back cap which is sleeved on the outer side wall of the second universal ball head rod and is opened towards the ball head of the second universal ball head rod, the outer side wall of the guide shoe is in threaded connection with the inner side wall of the second back cap, and the inner side wall of the guide shoe is in universal connection with the ball head of the second universal ball head rod.
Further, the filter sleeve is a filter screen, and the filter screen is sleeved on the outer wall of the universal base pipe. Thus, when gravel packing is performed on a gravel day, gravel enters the well with the fluid, the gravel forms a gravel pack on the outer walls of the well and flexible screen, and the screen jacket can hold the gravel out and can be used to form a production channel.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention can freely bend in a three-dimensional axial well bore with an ultra-short curvature radius of 2.5 meters through the plurality of sand control flexible screen pipe units which are connected in a universal way and are adjacent from end to end, so that the whole pipeline can extend into a well drilling with the ultra-short curvature radius, the smooth descending of a pipe column is ensured, the blocking phenomenon is avoided,
(2) According to the sand control flexible screen pipe unit, the universal flushing pipe is arranged in the sand control flexible screen pipe unit, the universal flushing pipe can synchronously bend along with the universal base pipe, and compared with the conventional method that the gravel packing operation is carried out by additionally arranging the flushing pipe after the flexible screen pipe is put down, the sand control flexible screen pipe unit can directly carry out the gravel packing operation after being put down in place, has ingenious design and compact structure, and can greatly improve the operation efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection structure of the flexible screen section and the guide shoe of the present invention;
FIG. 3 is a schematic view of the structure of a sand control flexible screen unit of the present invention.
The graphic indicia are illustrated as follows:
1-filling tool, 2-flexible screen pipe section, 3-guide shoe, 4-first adapter, 5-second connector, 6-packer, 21-sand control flexible screen pipe unit, 41-upper connector, 42-flushing pipe connector, 51-second universal ball head rod, 52-second back cap, 111-universal ball head rod, 112-back cap, 211-universal connector, 212-universal base pipe, 213-filter sleeve, 214-universal flushing pipe, 141-ball cavity, 142-ball head, 143-centralizing table, 411-annular boss.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Example 1
As shown in fig. 1 to 3, a completion string structure for an ultra-short radius well comprises a filling tool 1, a flexible screen section 2 and a guide shoe 3, wherein one end of the flexible screen section 2 is connected with the filling tool 1, the other end of the flexible screen section 2 is connected with the guide shoe 3, a packer 6 is further arranged on the outer side wall of the filling tool 1, the flexible screen section 2 comprises a plurality of sand-preventing flexible screen units 21 connected end to end, each sand-preventing flexible screen unit 21 comprises a universal connector 211, a universal base pipe 212 connected with the universal connector 211 in a universal mode, a filtering sleeve 213 sleeved on the periphery of the universal base pipe 212, and a universal flushing pipe 214 arranged inside the universal base pipe 212 and connected with the universal base pipe 212 in a coaxial mode, wherein the universal connectors 211 of two adjacent sand-preventing flexible screen units 21 are connected with the universal base pipe 212, and the universal flushing pipes 214 of the two adjacent sand-preventing flexible screen units 21 are connected with each other.
In this way, the flexible screen pipe section 2 can be bent because the flexible pipe is formed by splicing the sand control flexible screen pipe units 21 which are connected end to end, and the universal joint 211 is rotationally connected with the universal base pipe 212, so that two adjacent sand control flexible screen pipe units 21 can rotate in a certain angle to form a rotation angle; the sand control flexible screen units 21 are respectively provided with an independent universal flushing pipe 214, two adjacent universal flushing pipes 214 can be connected with each other to form an internal channel, the sand control flexible screen units 21 are coaxially connected with the universal base pipe 212 through the universal connector 211, the universal flushing pipes 214 can also be rotationally connected with the universal base pipe 212 along with the spherical pipes, the screen pipes can extend into wells with different bending degrees, and the universal flushing pipes 214 can also be bent along with the external universal base pipe 212; thus, when completing a well, the self-contained universal washpipe 214 can be used directly for gravel packing operations without the need for additional washpipe running in conventional flexible screen tubing used in ultra-short radius wells.
As shown in fig. 2, the flexible screen section 2 and the filling tool 1 are connected through a first adapter 4, the first adapter 4 comprises an upper joint 41 and a flushing pipe joint 42, one end of the upper joint 41 is in threaded connection with the filling tool 1 and the other end is in threaded connection with the universal joint 211, one end of the flushing pipe joint 42 is in threaded connection with the filling tool 1 and the other end is in universal connection with the universal flushing pipe 214.
As shown in fig. 3, an annular boss 411 is provided in the upper joint 41, and the flushing pipe joint 42 penetrates the annular boss 411 and is fixedly connected with the annular boss 411 by threads.
As shown in fig. 2 and 3, the universal joint 211 includes a universal ball rod 111, a back cap 112 sleeved on an outer side wall of the universal ball rod 111 and having an opening facing a ball head of the universal ball rod 111, and a universal base tube 212 positioned between the back cap 112 and the ball head of the universal ball rod 111, an outer side wall of a universal end of the universal base tube 212 being connected to an inner side wall of the back cap 112, and an inner side wall of the universal end of the universal base tube 212 being connected to the ball head of the universal ball rod 111. In this way, the universal ball rod 111 is inserted into the ball cavity of the universal end of the universal base pipe 212 and is locked by the back cap 112, realizing a connection structure capable of rotating within a certain range.
As shown in fig. 2 and 3, one end of the universal flushing pipe 214 is provided with a ball cavity 141, the other end of the universal flushing pipe 214 is provided with a ball head 142 matched with the ball cavity 141, and when two adjacent universal flushing pipes 214 are connected, the adjacent ball cavity 141 is in universal connection with the ball head 142. In this way, a connection structure which can rotate within a certain range can be realized between two adjacent universal flushing pipes 214.
As shown in fig. 2 and 3, the center of the ball cavity 141 of the universal flushing pipe 214 coincides with the center of the ball of the universal ball rod 111, and the inner side of the ball of the universal ball rod 111 is provided with a conical surface for lateral bending of the outer side wall of the ball cavity 141. Thus, during the running process of the three-dimensional axis well bore, the universal flushing pipe 214 can bend along with the movement of the base pipe, and the universal flushing pipe and the base pipe synchronously bend to realize linkage synchronous running.
In this embodiment, the ball-type cavity 141 of the universal flushing pipe 214 is bent over a range of 12 ° on one side of the ball portion of the universal ball head stem 111.
As shown in fig. 2 and 3, the outer side wall of the universal flushing pipe 214 is further provided with a centering table 143, and the centering table 143 is clamped on the inner wall of the universal base pipe 212.
As shown in fig. 2, the guide shoe 3 is connected with the flexible screen section 2 through a second connector 5, the second connector 5 comprises a second universal ball head rod 51, a second back cap 52 which is sleeved on the outer side wall of the second universal ball head rod 51 and is opened towards the ball head part of the second universal ball head rod 51, the outer side wall of the guide shoe 3 is in threaded connection with the inner side wall of the second back cap 52, and the inner side wall of the guide shoe 3 is in universal connection with the ball head part of the second universal ball head rod 51.
In this embodiment, the filter sleeve 213 is a filter mesh, and the filter mesh is sleeved on the outer wall of the universal base pipe 212. Thus, when gravel packing is performed on a gravel day, gravel enters the well with the fluid, the gravel forms a gravel pack on the well and the outer wall of the flexible screen section 2, and the screen jacket can hold the gravel out and can be used to form a production channel.
Example 2
This embodiment is similar to embodiment 1 except that the spherical cavity 141 of the universal flushing pipe 214 in this embodiment is bent over a single side of the ball head portion of the universal ball stem 111 by an angle of 8 °. Other structures and principles of this embodiment are the same as those of embodiment 1.
Example 3
This embodiment is similar to embodiment 1 except that the spherical cavity 141 of the universal flushing pipe 214 in this embodiment has a single-sided bending range of 16 ° at the ball end of the universal ball stem 111 the other structures and principles of this embodiment are the same as those of embodiment 1.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. A well completion tubular column structure for ultrashort radius well, includes filling tool (1), flexible screen section (2) and guide shoe (3), the one end of flexible screen section (2) with filling tool (1) is connected, the other end of flexible screen section (2) with guide shoe (3) are connected, still be equipped with packer (6) on the lateral wall of filling tool (1), its characterized in that: the flexible screen pipe section (2) comprises a plurality of sand control flexible screen pipe units (21) which are connected end to end, the sand control flexible screen pipe units (21) comprise universal connectors (211), universal base pipes (212) which are connected with the universal connectors (211) in a universal mode, filter sleeves (213) which are sleeved on the peripheries of the universal base pipes (212), and universal flushing pipes (214) which are arranged inside the universal base pipes (212) and are connected with the universal base pipes (212) in a coaxial mode, the universal connectors (211) of two adjacent sand control flexible screen pipe units (21) are connected with the universal base pipes (212), and the universal flushing pipes (214) of the two adjacent sand control flexible screen pipe units (21) are connected with each other; the universal joint (211) comprises a universal ball rod (111), a back cap (112) sleeved on the outer side wall of the universal ball rod (111) and provided with an opening facing the ball head part of the universal ball rod (111), the universal base tube (212) is positioned between the back cap (112) and the ball head part of the universal ball rod (111), the outer side wall of the universal end of the universal base tube (212) is connected with the inner side wall of the back cap (112), and the inner side wall of the universal end of the universal base tube (212) is connected with the ball head part of the universal ball rod (111) in a universal way; one end of each universal flushing pipe (214) is provided with a ball cavity (141), the other end of each universal flushing pipe (214) is provided with a ball head (142) matched with the ball cavity (141), and the adjacent ball cavities (141) are in universal connection with the ball heads (142) when the two adjacent universal flushing pipes (214) are connected.
2. Completion string structure for ultra-short radius well according to claim 1, characterized in that the flexible screen section (2) and the packing tool (1) are connected by a first adapter (4), the first adapter (4) comprises an upper joint (41) and a flushing pipe joint (42), one end of the upper joint (41) is in threaded connection with the packing tool (1) and the other end is in threaded connection with the universal joint (211), one end of the flushing pipe joint (42) is in threaded connection with the packing tool (1) and the other end is in universal connection with the universal flushing pipe (214).
3. Completion string structure for ultra-short radius wells according to claim 2, characterized in that the inside of the upper joint (41) is provided with an annular boss (411), and the washpipe joint (42) penetrates the annular boss (411) and is fixedly connected with the annular boss (411) by threads.
4. The completion string structure for ultra-short radius well according to claim 1, wherein the spherical center of the spherical cavity (141) of the universal flushing pipe (214) coincides with the spherical center of the spherical head of the universal ball head rod (111), and the inner side of the spherical head of the universal ball head rod (111) is provided with a conical surface for lateral bending of the outer side wall of the spherical cavity (141).
5. Completion string structure for ultra-short radius wells according to claim 1 characterized by the spherical cavity (141) of the universal washpipe (214) being bent in the range of 8 ° to 16 ° on one side of the bulb of the universal bulb stem (111).
6. The completion string structure for ultra-short radius wells according to claim 5, wherein the outer side wall of the universal washpipe (214) is further provided with a centralizing table (143), and the centralizing table (143) is clamped on the inner wall of the universal base pipe (212).
7. Completion string structure for ultra-short radius well according to claim 1, characterized in that, the guide shoe (3) is connected with the flexible screen section (2) through a second connector (5), the second connector (5) comprises a second universal ball head rod (51), a second back cap (52) sleeved on the outer side wall of the second universal ball head rod (51) and having an opening towards the ball head part of the second universal ball head rod (51), the outer side wall of the guide shoe (3) is in threaded connection with the inner side wall of the second back cap (52), and the inner side wall of the guide shoe (3) is in universal connection with the ball head part of the second universal ball head rod (51).
8. Completion string structure for ultra-short radius wells according to claim 1, characterized in that the filter sleeve (213) is a filter screen, which is sleeved on the outer wall of the universal base pipe (212).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121200661 | 2021-05-31 | ||
| CN2021212006610 | 2021-05-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113818844A CN113818844A (en) | 2021-12-21 |
| CN113818844B true CN113818844B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111089491.8A Active CN113818844B (en) | 2021-05-31 | 2021-09-16 | Completion pipe string structure for ultra-short radius well |
| CN202122251875.7U Active CN216381335U (en) | 2021-05-31 | 2021-09-16 | Flexible screen pipe and well completion pipe string |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122251875.7U Active CN216381335U (en) | 2021-05-31 | 2021-09-16 | Flexible screen pipe and well completion pipe string |
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| CN (2) | CN113818844B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114876419B (en) * | 2022-05-17 | 2023-05-09 | 四川轻化工大学 | Flexible screen pipe with automatic reset function |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832105A (en) * | 2010-04-28 | 2010-09-15 | 李孝勇 | Method for well drilling and cementing of radial horizontal well with ultra-short radius and equipment thereof |
| JP5256369B2 (en) * | 2011-10-04 | 2013-08-07 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Laser drilling rig |
| CN109779575A (en) * | 2019-03-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of deep camber wellbore sand control completion tubing string and completion method |
| CN109915086B (en) * | 2019-04-08 | 2023-09-26 | 海油来博(天津)科技股份有限公司 | Sectional type flexible sand control screen pipe |
| CN209942799U (en) * | 2019-04-08 | 2020-01-14 | 海油来博(天津)科技股份有限公司 | Flexible sand control screen pipe with section-by-section filling function |
| CN110984922B (en) * | 2019-12-02 | 2022-04-08 | 中国海洋石油集团有限公司 | Multi-branch ultra-short curvature radius well completion sand prevention pipe column structure |
-
2021
- 2021-09-16 CN CN202111089491.8A patent/CN113818844B/en active Active
- 2021-09-16 CN CN202122251875.7U patent/CN216381335U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113818844A (en) | 2021-12-21 |
| CN216381335U (en) | 2022-04-26 |
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