CN109611060B - Floating sieve tube - Google Patents
Floating sieve tube Download PDFInfo
- Publication number
- CN109611060B CN109611060B CN201811416014.6A CN201811416014A CN109611060B CN 109611060 B CN109611060 B CN 109611060B CN 201811416014 A CN201811416014 A CN 201811416014A CN 109611060 B CN109611060 B CN 109611060B
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- China
- Prior art keywords
- tube
- filter tube
- filter
- threaded connection
- joint
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- 238000007667 floating Methods 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filtration Of Liquid (AREA)
- Filtering Materials (AREA)
Abstract
The invention discloses a floating sieve tube which comprises a short joint, a connecting sleeve, a joint, a sealing plug, a closed cavity, an outer protecting tube, a filter tube, a base tube and a coupling, wherein the two ends of the filter tube are respectively connected with the short joint, the short joint is in threaded connection with the filter tube through the joint, the base tube is sleeved on the inner wall of the filter tube, the outer protecting tube is arranged on the periphery of the filter tube, the two ends of the outer protecting tube are respectively in threaded connection with the short joint through the connecting sleeve, the closed cavity is welded in a middle cavity space between the outer protecting tube and the filter tube, the coupling is in threaded connection with the short joint, and the sealing plug is arranged at the joint of the closed. According to the invention, the plurality of closed cavities are arranged in the traditional sieve tube, and air or low-density drilling fluid is filled into the closed cavities, so that the sieve tube generates buoyancy in the drilling fluid, the weight of a sieve tube column is reduced, the friction between the sieve tube and a sleeve and between the sieve tube and a barefoot well wall is reduced, and the problem that the sieve tube is difficult to drop in the well in the large-displacement long horizontal well completion operation is solved.
Description
The technical field is as follows:
the invention belongs to the field of petroleum well completion operation, and particularly relates to a floating sieve tube.
Background art:
with the continuous development of drilling technology, extended reach wells and horizontal wells play an important role in the development of marginal oil fields or thin oil layer oil fields. The outstanding characteristics of the large-displacement horizontal well generally have a longer horizontal section, and the tubular column is greatly influenced by the friction of a well hole in the construction process. When the screen pipe operation is finished in a large displacement well, the conventional screen pipe comprises a perforating base pipe, a filtering sleeve, an outer protective sleeve and the like, and an effective closed cavity cannot be formed inside the screen pipe, so that the buoyancy borne by the screen pipe string is small in the running-in process, most weight of the screen pipe acts on the well wall, the contact force between the screen pipe and the well wall is large, friction between the screen pipe and the sleeve pipe and between the screen pipe and the open hole well wall is large, and the screen pipe is difficult to run in. Once the screen pipe is stopped, the upper pipe column is difficult to apply effective weight to finish running, the treatment means is extremely limited, and the operation time effectiveness is seriously influenced.
In order to reduce the influence of high friction resistance on the screen pipe running to the maximum extent, a novel screen pipe needs to be developed, and the screen pipe can provide larger buoyancy so as to reduce the contact force between the screen pipe and the well wall and achieve the purpose of reducing the running friction resistance. The floating sieve tube is characterized in that a plurality of closed cavities are additionally arranged between a sieve tube filter layer and an outer protective sleeve, and air or low-density drilling fluid is filled into the closed cavities to increase the buoyancy of the sieve tube and reduce the weight of the whole sieve tube column in the drilling fluid, so that the problem of high friction resistance in the process of running a sieve tube in a highly-inclined well is solved. The floating sieve tube technology has important practical significance for solving the problem of running the large-displacement long horizontal well sieve tube.
The invention content is as follows:
the invention aims to provide a novel floating sieve tube, wherein a plurality of closed cavities are arranged in the traditional sieve tube, and air or low-density drilling fluid is filled into the closed cavities, so that the buoyancy of the sieve tube in the drilling fluid in a well is increased, the weight of a sieve tube column is reduced, friction resistance is reduced, and the problem that the sieve tube is difficult to descend in the well in the large-displacement long horizontal well completion operation is solved.
The invention adopts the following technical scheme:
the utility model provides a float screen pipe, includes short circuit, adapter sleeve, joint, sealed end cap, airtight die cavity, outer pillar, chimney filter, parent tube and coupling, the chimney filter both ends be connected with the short circuit respectively, the short circuit passes through joint and chimney filter threaded connection, the chimney filter inner wall has cup jointed the parent tube, the chimney filter periphery be equipped with the outer pillar filter, the outer pillar both ends are respectively through adapter sleeve and short circuit threaded connection, outer pillar filter and the middle cavity space between the chimney filter in welded and have airtight die cavity, coupling and short circuit threaded connection, airtight die cavity be equipped with sealed end cap with the junction of adapter sleeve.
The closed cavity is four uniformly distributed round waist-shaped pipes.
One end of the closed cavity is sealed by welding, three screw holes are reserved on the other end of the closed cavity by welding a sealing plate, and the screw holes are sealed by sealing plugs.
The filter tube is a stainless steel wire winding tube or a stainless steel precise micropore sand filter tube.
Compared with the prior art, the invention has the following advantages:
1. the screen pipe is internally provided with a plurality of closed cavities, and the closed cavities can be filled with air or other light media, so that the whole screen pipe generates buoyancy in the drilling fluid, the weight of the screen pipe column is reduced, the friction between the screen pipe and a sleeve pipe and between the screen pipe and a bare hole well wall is reduced, and meanwhile, the number of the closed cavities can be increased or decreased according to the working requirement, so that the screen pipe better meets the use requirement.
2. The screw hole is formed in one end of the sealed cavity in the sieve tube, the screw hole can be plugged by the sealing plug, the sealing plug can be mechanically opened for multiple times, and replacement of air or low-density drilling fluid in the sealed cavity is facilitated.
3. The floating sieve tube is similar to the traditional sieve tube, has simple structure and is convenient for production.
4. The floating sieve tube joint adopts threaded connection, the connection mode is simple, and the field assembly process is greatly simplified.
Description of the drawings:
FIG. 1 is a schematic view of the present invention in a longitudinal cut-away configuration;
fig. 2 is a schematic cross-sectional view taken along line a-a of fig. 1.
The specific implementation mode is as follows:
the floating sieve tube is characterized in that a plurality of closed cavities are arranged in the traditional sieve tube, air or light liquid is filled in the closed cavities in advance, and buoyancy generated by the air or light liquid in the closed cavities and the cavities in drilling fluid is utilized, so that the weight of a sieve tube column is reduced, friction between the sieve tube and a sleeve and between the sieve tube and a barefoot well wall is reduced, and the problem that the sieve tube is difficult to run in the well completion operation of a long horizontal well with large displacement is solved.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, a floating sieve tube comprises a short joint 1, a connecting sleeve 2, a joint 3, a sealing plug 4, a closed cavity 5, an outer protecting tube 6, a filter tube 7, a base tube 8 and a coupling 9, wherein two ends of the filter tube 7 are respectively connected with the short joint 1, the short joint 1 is in threaded connection with the filter tube 7 through the joint 3, the base tube 8 is sleeved on the inner wall of the filter tube 7, the outer protecting tube 6 is arranged on the periphery of the filter tube 7, two ends of the outer protecting tube 6 are respectively in threaded connection with the short joint 1 through the connecting sleeve 2, the closed cavity 5 is welded in a middle cavity space 10 between the outer protecting tube 6 and the filter tube 7, the coupling 9 is in threaded connection with the short joint 1, the sealing plug 4 is arranged at the joint of the closed cavity 5 and the connecting sleeve 2, the sealing plug 4 can be mechanically opened so as to facilitate the filling of air or low-density drilling fluid into the closed cavity 5, the weight of the sieve tube in the drilling, reduce the friction between the screen pipe and the casing pipe and between the screen pipe and the open hole well wall.
The closed cavity 5 is four uniformly distributed round waist-shaped pipes.
Referring to fig. 2, the closed cavity 5 is sealed at one end, and three screw holes 11 are reserved at the other end, and the screw holes 11 are matched with the sealing plug 4 to seal air or low-density drilling fluid in the closed cavity 5.
The filter tube 7 is a stainless steel wire winding tube or a stainless steel precise micropore sand filter tube.
The sieve tube is in threaded connection with the short joint 1 through a coupling 9, and the inside of the whole sieve tube column is connected smoothly after connection.
The working principle is as follows:
before the screen pipe is put into a well in the well completion operation, firstly, air or low-density drilling fluid is injected into a closed cavity 5 through a screw hole 11 on a plugging plate, the screw hole 11 on the plugging plate is plugged by a sealing plug 4, so that a closed space filled with air or other light media is formed inside the closed cavity 5, and after the screen pipe is put into the well, the buoyancy generated by the closed cavity 5 in the drilling fluid is utilized, so that the weight of the screen pipe column is reduced, the friction between the screen pipe and a sleeve pipe and between the screen pipe and the wall of an open hole well is reduced, and the screen pipe column is put into the well more conveniently and safely.
Meanwhile, the sealed cavities 5 are circular kidney-shaped sealed cavities which are uniformly welded on the outer protective pipe 6, and the clearance between the sealed cavities 5 and the middle cavity space 10 can ensure that crude oil normally goes deep without influencing the normal filtering function of the filter pipe 7.
The above description is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereto, and it should be apparent to those skilled in the art that modifications, variations, equivalents and the like can be made in the technical solution of the present invention without departing from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a float screen pipe, includes short circuit (1), adapter sleeve (2), connects (3), seals end cap (4), airtight die cavity (5), outer pillar (6), chimney filter (7), parent tube (8) and coupling (9), its characterized in that: filter tube (7) both ends be connected with short circuit (1) respectively, short circuit (1) through connect (3) and filter tube (7) threaded connection, filter tube (7) inner wall has cup jointed parent tube (8), filter tube (7) periphery be equipped with outer pillar (6), outer pillar (6) both ends are respectively through adapter sleeve (2) and short circuit (1) threaded connection, outer pillar (6) and filter tube (7) between middle cavity space (10) in welded joint have airtight die cavity (5), coupling (9) and short circuit (1) threaded connection, airtight die cavity (5) be equipped with sealed end cap (4) with the junction of adapter sleeve (2), through filling air or filling low density drilling fluid to airtight die cavity (5).
2. The floating screen of claim 1, wherein: the closed cavity (5) is four uniformly distributed round waist-shaped pipes.
3. The floating screen of claim 2, wherein: one end of the closed cavity (5) is sealed by welding, three screw holes (11) are reserved on the other end of the closed cavity which is welded with the sealing plate, and the screw holes (11) are sealed by sealing plugs (4).
4. The floating screen of claim 1, wherein: the filter tube (7) is a stainless steel wire winding tube or a stainless steel precise micropore sand filter tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416014.6A CN109611060B (en) | 2018-11-26 | 2018-11-26 | Floating sieve tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416014.6A CN109611060B (en) | 2018-11-26 | 2018-11-26 | Floating sieve tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109611060A CN109611060A (en) | 2019-04-12 |
| CN109611060B true CN109611060B (en) | 2021-03-02 |
Family
ID=66004605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811416014.6A Active CN109611060B (en) | 2018-11-26 | 2018-11-26 | Floating sieve tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109611060B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374530A (en) * | 2019-07-16 | 2019-10-25 | 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 | A method of increasing tubing string depth of setting by changing tube fluid density |
| CN110439478B (en) * | 2019-07-18 | 2022-03-29 | 中国石油天然气集团有限公司 | Double-layer combined sleeve structure with inner-layer sleeve in threaded connection and assembling method thereof |
| PL442369A1 (en) * | 2022-09-27 | 2024-04-02 | Akademia Górniczo-Hutnicza Im.Stanisława Staszica W Krakowie | Method of installing a modular underground water filter in a drilling hole and the underground water filter module |
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| JP3544764B2 (en) * | 1995-10-30 | 2004-07-21 | 新日本製鐵株式会社 | How to lay pipes in the ground using buoyancy |
| US6305468B1 (en) * | 1999-05-28 | 2001-10-23 | Baker Hughes Incorporated | Downhole screen and method of manufacture |
| CN2375839Y (en) * | 1999-06-09 | 2000-04-26 | 赵万荣 | Pressure anti-leak variable buoyancy oil delivery floating pipe |
| US6634430B2 (en) * | 2001-12-20 | 2003-10-21 | Exxonmobil Upstream Research Company | Method for installation of evacuated tubular conduits |
| CN2886053Y (en) * | 2006-01-24 | 2007-04-04 | 石凤岐 | Going-into-well resistance absorber for horizontal well casing |
| JP2007285317A (en) * | 2006-04-12 | 2007-11-01 | Sekisui Chem Co Ltd | Tube |
| CN200968198Y (en) * | 2006-11-14 | 2007-10-31 | 刘莉 | Telescopic compression sealing grouting device |
| CN1994812A (en) * | 2006-12-21 | 2007-07-11 | 中国科学院广州能源研究所 | Float type marine device capable of shielding from typhoon and other natural disasters |
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- 2018-11-26 CN CN201811416014.6A patent/CN109611060B/en active Active
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| Publication number | Publication date |
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| CN109611060A (en) | 2019-04-12 |
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