CN110984915A - Elastic paraffin scraping and sand washing type guide cone for oil field - Google Patents
Elastic paraffin scraping and sand washing type guide cone for oil field Download PDFInfo
- Publication number
- CN110984915A CN110984915A CN201911316885.5A CN201911316885A CN110984915A CN 110984915 A CN110984915 A CN 110984915A CN 201911316885 A CN201911316885 A CN 201911316885A CN 110984915 A CN110984915 A CN 110984915A
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- China
- Prior art keywords
- wax
- scraping
- scrape
- elastic
- sand
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Links
- 238000007790 scraping Methods 0.000 title claims abstract description 85
- 239000004576 sand Substances 0.000 title claims abstract description 66
- 238000005406 washing Methods 0.000 title claims abstract description 49
- 239000012188 paraffin wax Substances 0.000 title claims description 13
- 239000003129 oil well Substances 0.000 claims abstract description 9
- 239000001993 wax Substances 0.000 claims description 121
- 230000000694 effects Effects 0.000 claims description 20
- 240000007817 Olea europaea Species 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 230000005489 elastic deformation Effects 0.000 claims description 3
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
-
- 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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1042—Elastomer protector or centering means
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses an elastic wax scraping and sand washing type guide cone for an oil field, and relates to the technical field of downhole tools for the oil field. The well completion pipe column can be guided and centered, the well completion pipe column is prevented from being damaged after falling to the bottom of the well, wax scraping and sand washing can be carried out on the oil well, the construction cost is reduced, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of oil field downhole tools, in particular to an oil field elastic paraffin scraping and sand washing type guide cone.
Background
When an oil-water downhole completion pipe string is used for the current oilfield downhole operation, a guide cone (the guide cone has the function of connecting the guide cone to the lowest end of the oil-water well completion pipe string to block the pipe string and prevent the pipe string from being blocked in a sleeve in the process of pipe string running construction) needs to be connected to the lower end of a tail pipe at the bottommost part of the completion pipe string, but the guide cone has a single function, cannot scrape wax and pass through a well, cannot wash sand and centralize the pipe string, and cannot cause damage to the pipe string due to the fact that a shock-proof buffering function does not exist when the completion pipe string falls into the bottom of the well in; in addition, in the well repairing process requiring the moving of the tubular column, most of the inner walls of the casings need to be cleaned by scraping wax and dredging the well to remove oil wax, scale, various crystals and the like on the inner walls, a wax scraper needs to be separately lowered into the casings during wax scraping, the conventional wax scraper is a rigid member in a column or a cylinder shape, after the wax scraper enters the slightly deformed casings, the wax scraper cannot be smoothly lowered due to the deformation of the casings, and after the casings need to be checked, the wax scraper of the corresponding specification is selected to scrape the wax again, so that the construction cost is high, the timeliness is low, and the labor intensity of workers is high.
Disclosure of Invention
The invention aims to provide an elastic wax scraping and sand washing guide cone for an oil field, which is used for solving the problems in the prior art, can guide and centralize a well completion pipe string, avoid the well completion pipe string from being damaged after falling to the bottom of a well, can scrape wax and wash sand for an oil well, reduce the construction cost and improve the construction efficiency.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an elastic wax scraping and sand washing type guide cone for an oil field, which comprises a wax scraping body, a wax scraping female buckle and a sand washing pipe, wherein the wax scraping body is an olive ball body with a hollow inner part, the diameters of two ends of the olive ball body are smaller than that of the middle part, a spiral opening is arranged on the side wall of the olive ball body, the side wall of the olive ball body is extruded to enable the olive ball body to generate elastic deformation, the two ends of the olive ball body are respectively and fixedly provided with the wax scraping female buckle and the sand washing pipe, the wax scraping female buckle is hollow and is communicated with the inner part of the wax scraping body, the wax scraping female buckle is used for being connected with a tail pipe, the sand washing pipe is communicated with the inner part of the wax scraping body, the sand washing pipe is used for washing sand for an oil well, the wax scraping body can elastically pass through a deformed sleeve pipe, and one end, close to the wax scraping body, in the wax scraping female buckle is, the one-way guiding device can enable a medium to flow from the inside of the wax scraping body to the inside of the wax scraping female buckle, and the one-way guiding device can prevent the medium from flowing from the inside of the wax scraping female buckle to the inside of the wax scraping body.
Preferably, one-way guiding device includes fixed blanking cover of annular and activity blanking cover, scrape in the wax box bottom fixed being equipped with the fixed blanking cover of annular, the fixed blanking cover upper surface of annular is equipped with the screw hole, the fixed blanking cover top of annular is equipped with the activity blanking cover, activity blanking cover surface is equipped with the through-hole, the through-hole with the screw hole is coaxial, and a bolt passes behind the through-hole with screw hole threaded connection, the cover has the spring on the screw rod of bolt, the spring is located the activity blanking cover with between the nut of bolt, the spring extrusion the activity blanking cover upper surface.
Preferably, the inner wall of the wax scraping female buckle is provided with an internal thread, and the internal thread is used for being connected with a tail pipe.
Preferably, a sharp corner is arranged at the bottom end of the sand washing pipe.
Preferably, the internal thread is a tapered thread.
Preferably, a sealing groove is formed in the circumferential surface of the annular fixed plug cover, a sealing ring is arranged in the sealing groove, and the sealing ring is used for being connected with the circumferential surface of the annular fixed plug cover in a sealing mode and the inner wall of the wax scraping female buckle.
Preferably, the wall thickness of the wax scraping body is equal everywhere.
Preferably, the wax scraping body is in smooth transition connection with the wax scraping female buckle.
Preferably, the wax scraping body is in smooth transition connection with the sand washing pipe.
Preferably, three spiral openings are formed in the side wall of the football body, and the openings are distributed in an array mode along the circumferential direction of the football body.
Compared with the prior art, the invention has the following technical effects:
the invention provides an oil field elastic wax scraping and sand washing guide cone, which is connected to the lower end of a tail pipe, a well completion pipe column is introduced into a casing, the edge of an opening of an olive ball body can scrape substances such as oil wax, scale and the like attached to the inner wall of the casing, when the casing is deformed, the olive ball body can elastically pass through the deformed casing section and can also scrape wax and clean the pipe wall, compared with the traditional wax scraping, after the casing is deformed, a wax scraper with a corresponding specification is selected for scraping wax again after checking the casing, and the oil field elastic wax scraping and sand washing guide cone provided by the application can complete wax scraping operation only by introducing the casing once, thereby reducing the construction cost and improving the construction efficiency; after the well completion pipe column is led into the casing, the rugby ball body is contacted with the inner wall of the casing, so that the well completion pipe column can be guided and centered, and if the well completion pipe column falls to the bottom of the well, the elastic rugby ball body can play a role in buffering the well completion pipe column, so that the well completion pipe column is prevented from being damaged after falling to the bottom of the well; the setting of sand washing pipe can carry out the sand washing operation to the oil well to make the sand body can only be one-wayly scrape wax box inside by scraping the inside flow direction of wax body through one-way guiding device, can not reverse the return, guaranteed the sand washing effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a partial cross-sectional view of an oilfield elastic wax scraping and sand washing type guide cone provided by the invention;
FIG. 2 is an enlarged partial cross-sectional view of a wax scraping box in the oilfield elastic wax scraping and sand washing type guide cone of FIG. 1;
FIG. 3 is a front view of an annular fixed blanking cover in the elastic wax scraping and sand flushing type guide cone for the oilfield provided by the invention;
FIG. 4 is a cross-sectional view A-A of the annular securing cap of FIG. 3;
FIG. 5 is a front view of a movable plug in an elastic wax scraping and sand flushing type guide cone for an oilfield according to the present invention;
FIG. 6 is a sectional view taken along line B-B of the removable closure of FIG. 5;
in the figure: 1-wax scraping body, 2-wax scraping female buckle, 3-sand washing pipe, 4-annular fixed plug cover, 5-movable plug cover, 6-threaded hole, 7-through hole, 8-bolt, 9-spring, 10-internal thread, 11-sealing ring and 12-sealing groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an elastic wax scraping and sand washing type guide cone for an oil field, which is used for solving the problems in the prior art, can guide and centralize a well completion pipe string, avoid the damage of the well completion pipe string after the well completion pipe string falls off from the bottom of a well, can scrape and wash sand for the oil well, reduce the construction cost and improve the construction efficiency.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, this embodiment provides an oil field elasticity is scraped wax and is washed away sand formula guide cone, including scraping wax body 1, scrape wax box 2 and sand wash pipe 3, it is inside hollow olive spheroid to scrape wax body 1, the diameter at olive spheroid both ends is less than the diameter at middle part, be equipped with spiral helicine opening on the olive spheroid lateral wall, extrusion olive spheroid lateral wall can make olive spheroid take place elastic deformation, olive spheroid both ends are fixed respectively to be equipped with scrapes wax box 2 and sand wash pipe 3, scrape the inside cavity of wax box 2 and scrape inside and scrape the inside intercommunication of wax body 1, it is used for being connected with the tail pipe to scrape wax box 2, sand wash pipe 3 with scrape the inside intercommunication of wax body 1, sand wash pipe 3 is used for the oil well sand wash, it can the elasticity through the sleeve pipe that warp to scrape wax body 1, it is equipped with one-way guiding device to scrape the inside one end of wax box 2 near scraping wax body 1, one-way guiding device can make the medium flow to scrape inside the wax box 2 inside and scrape the one-way guiding device and can make The medium can be prevented from flowing from the inside of the wax scraping female buckle 2 to the inside of the wax scraping body 1.
The elastic wax scraping and sand washing guide cone for the oil field is connected to the lower end of a tail pipe of a well completion pipe column, after the well completion pipe column is introduced into an oil well, a sand washing pipe 3 at the bottom can wash sand of the oil well, sand bodies can only flow to the inside of a wax scraping female buckle 2 from the inside of a wax scraping body 1 in one direction through a one-way flow guide device and cannot return in the opposite direction, and the sand washing effect is ensured; the edge of the opening of the olive ball body can scrape substances such as oil wax, scale and the like attached to the inner wall of the sleeve, when the deformed sleeve is encountered, the olive ball body can elastically pass through the deformed sleeve section and can also scrape wax on the pipe wall, and compared with the traditional wax scraping method, after the deformed sleeve is encountered, a wax scraper with a corresponding specification is selected to scrape wax again after the sleeve is checked; after the well completion pipe column is led into the casing pipe, the rugby ball body is contacted with the inner wall of the casing pipe, the well completion pipe column can be guided and righted, if the well completion pipe column falls to the bottom of the well, the elastic rugby ball body can play a buffering role on the well completion pipe column, and the well completion pipe column is prevented from being damaged after falling to the bottom of the well.
As shown in fig. 2 to 6, the one-way guiding device comprises an annular fixed block cover 4 and a movable block cover 5, the bottom of the wax scraping box 2 is fixedly provided with the annular fixed block cover 4, the upper surface of the annular fixed block cover 4 is provided with a threaded hole 6, the upper part of the annular fixed block cover 4 is provided with the movable block cover 5, the surface of the movable block cover 5 is provided with a through hole 7, the through hole 7 is coaxial with the threaded hole 6, a bolt 8 passes through the through hole 7 and is in threaded connection with the threaded hole 6, a spring 9 is sleeved on a screw rod of the bolt 8, the spring 9 is positioned between the movable block cover 5 and a nut of the bolt 8, the spring 9 extrudes the upper surface of the movable block cover 5, in the embodiment, three threaded holes 6 are arranged along the circumferential direction of the annular fixed block cover 4, three through holes 7 are correspondingly arranged on the surface of the movable block cover 5, the three bolts 8 pass through the, the fluid that contains the sand body strikes the lower surface of activity blanking cover 5, and the upper surface extrusion spring 9 of activity blanking cover 5 makes activity blanking cover 5 upwards keep away from annular fixed blanking cover 4, scrapes 1 inside and scrapes the inside intercommunication of wax box 2 of wax body, and the fluid that contains the sand body is from scraping 1 inside flow directions of wax body to scraping 2 inside of wax box, can not reverse flow back to can guarantee the effect of sand washing.
As shown in figure 2, the inner wall of the wax scraping female buckle 2 is provided with an internal thread 10, the internal thread 10 is used for being connected with a tail pipe, and the wax scraping female buckle is connected with the tail pipe through the thread, so that the wax scraping female buckle is convenient and reliable to connect and easy to detach.
As shown in figure 1, the bottom end of the sand washing pipe 3 is provided with a closed angle, and the sand setting at the bottom of the well can be broken through the arrangement of the closed angle, so that the sand washing effect is better.
As shown in fig. 2, the internal thread 10 is a tapered thread, and the sealing performance is better when the tapered thread is used for connection.
As shown in fig. 2 and 4, a sealing groove 12 is formed on the circumferential surface of the annular fixed block cover 4, a sealing ring 11 is arranged in the sealing groove 12, and the sealing ring 11 is used for sealing and connecting the circumferential surface of the annular fixed block cover 4 and the inner wall of the wax scraping female buckle 2, so that the sealing effect is good.
Scrape the wall thickness homoenergetic of wax body 1 each department and equal, when scraping the wax clearance to the intraductal wall of casing, scrape wax body 1 lateral wall atress everywhere more even, it is better to scrape the wax effect.
Scrape wax body 1 and scrape smooth transition of wax box 2 and be connected, stress concentration when having avoided scraping wax body 1 and scraping wax improves life.
Scrape wax body 1 and sand washing pipe 3 smooth transition and be connected, stress concentration when having avoided sand washing pipe 3 sand washing and scraping wax body 1 and scraping wax improves life.
Be equipped with three heliciform openings on the football body lateral wall, each opening is along football body circumferencial direction array distribution, can set up the opening of different quantity according to actual conditions to satisfy and scrape the wax demand.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The utility model provides an oil field elasticity paraffin scraping sand washing formula guide cone which characterized in that: including scraping the wax body, scraping wax box and washing sand pipe, it is inside hollow football body to scrape the wax body, the diameter at football body both ends is less than the diameter at middle part, be equipped with spiral helicine opening on the football body lateral wall, the extrusion olive spheroidal lateral wall can make the olive spheroid takes place elastic deformation, olive spheroid both ends are fixed being equipped with respectively scrape the wax box with washing sand pipe, scrape the inside cavity of wax box just scrape the wax box inside with scrape the inside intercommunication of wax body, it is used for being connected with the tail pipe to scrape the wax box, washing sand pipe with scrape the inside intercommunication of wax body, washing sand pipe is used for washing sand to the oil well, it can the elasticity through the sleeve pipe that warp to scrape the wax body, it is inside close to scrape the wax box the one end of scraping the wax body is equipped with one-way guiding device, one-way guiding device can make the medium follow scrape the inside flow direction of wax body scrape the wax box inside just one-way guiding device can prevent that the wax box from The medium flows from the inside of the wax scraping female buckle to the inside of the wax scraping body.
2. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: one-way guiding device includes fixed blanking cover of annular and activity blanking cover, scrape fixed being equipped with of bottom in the wax box the fixed blanking cover of annular, the fixed blanking cover upper surface of annular is equipped with the screw hole, the fixed blanking cover top of annular is equipped with the activity blanking cover, activity blanking cover surface is equipped with the through-hole, the through-hole with the screw hole is coaxial, and a bolt passes behind the through-hole with screw hole threaded connection, the cover has the spring on the screw rod of bolt, the spring is located the activity blanking cover with between the nut of bolt, the spring extrusion activity blanking cover upper surface.
3. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: the inner wall of the wax scraping female buckle is provided with an internal thread, and the internal thread is used for being connected with a tail pipe.
4. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: the bottom end of the sand washing pipe is provided with a sharp corner.
5. The oilfield elastic paraffin scraping and sand washing guide cone of claim 3, wherein: the internal thread is a tapered thread.
6. The oilfield elastic paraffin scraping and sand washing guide cone of claim 2, wherein: the sealing ring is used for being connected with the circumferential surface of the annular fixed plug cover in a sealing mode and the inner wall of the wax scraping female buckle in a sealing mode.
7. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: the wall thickness of each part of the wax scraping body is equal.
8. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: the wax scraping body is connected with the wax scraping female buckle in a smooth transition mode.
9. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: the wax scraping body is connected with the sand washing pipe in a smooth transition mode.
10. The oilfield elastic paraffin scraping and sand washing guide cone of claim 1, wherein: the side wall of the football body is provided with three spiral openings, and the openings are distributed in an array mode along the circumferential direction of the football body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911316885.5A CN110984915B (en) | 2019-12-19 | 2019-12-19 | Elastic paraffin scraping and sand washing type guide cone for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911316885.5A CN110984915B (en) | 2019-12-19 | 2019-12-19 | Elastic paraffin scraping and sand washing type guide cone for oil field |
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| Publication Number | Publication Date |
|---|---|
| CN110984915A true CN110984915A (en) | 2020-04-10 |
| CN110984915B CN110984915B (en) | 2022-03-29 |
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| CN201911316885.5A Active CN110984915B (en) | 2019-12-19 | 2019-12-19 | Elastic paraffin scraping and sand washing type guide cone for oil field |
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| RU2063575C1 (en) * | 1993-03-22 | 1996-07-10 | Нефтегазодобывающее управление "Альметьевнефть" | Device for cleaning inner side of pipes |
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