CN106917601A - Wax scraper and method for washing and dewaxing heavy oil well - Google Patents
Wax scraper and method for washing and dewaxing heavy oil well Download PDFInfo
- Publication number
- CN106917601A CN106917601A CN201510997942.6A CN201510997942A CN106917601A CN 106917601 A CN106917601 A CN 106917601A CN 201510997942 A CN201510997942 A CN 201510997942A CN 106917601 A CN106917601 A CN 106917601A
- Authority
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- China
- Prior art keywords
- wax
- heavy oil
- paraffin
- scraper
- oil wells
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000295 fuel oil Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005406 washing Methods 0.000 title abstract 3
- 239000001993 wax Substances 0.000 claims abstract description 129
- 239000012188 paraffin wax Substances 0.000 claims abstract description 109
- 239000003921 oil Substances 0.000 claims abstract description 54
- 239000007864 aqueous solution Substances 0.000 claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 239000003129 oil well Substances 0.000 claims description 19
- 238000011010 flushing procedure Methods 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 14
- 239000000284 extract Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000007790 scraping Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000005474 detonation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a paraffin scraper and a method for washing and dewaxing a heavy oil well, and belongs to the technical field of downhole operation. The method comprises the following steps: judging whether the distance from the wellhead of the heavy oil well to the lowest end of a wax section of a casing in the heavy oil well is smaller than the distance from the lowest end of an oil pipe in the heavy oil well to the bottom of the heavy oil well; when the judgment is yes, installing a wax scraper on an oil pipe at the wellhead of the heavy oil well, wherein the small end of the wax scraper is positioned above the large end; putting the wax scraper into the casing along with the oil pipe, and scraping wax from the wax section in the casing; and circularly washing the heavy oil well, and pumping the wax scraped by the wax scraper out of the heavy oil well. Wax attached to the inner wall of the sleeve is scraped by the wax scraper, so that the wax is separated from the inner wall of the sleeve, and then the aqueous solution of the wax dissolving agent is injected into the sleeve, so that the contact area of the wax in the sleeve and the aqueous solution of the wax dissolving agent is increased, and the dissolving and cleaning effects of the aqueous solution of the wax dissolving agent on the wax are improved.
Description
Technical field
The present invention relates to underground work technical field, more particularly to a kind of paraffin scraper and heavy oil wells well-flushing solution wax
Method.
Background technology
Heavy oil wells are a kind of oil wells of output viscous crude, and sleeve pipe and oil pipe, the oil pipe are provided with heavy oil wells
It is arranged in sleeve pipe；Contain substantial amounts of wax in viscous crude in heavy oil wells, wax is easily separated out and attached from viscous crude
On internal surface of sleeve pipe, the wax on internal surface of sleeve pipe forms wax section, the wax section in sleeve pipe can reduce oil
Decentralization or the speed that goes out of the pipe in sleeve pipe, it is therefore desirable to heavy oil wells often are carried out with well-flushing solution wax, will be attached
The wax in sleeve pipe is washed.
At present, the method for heavy oil wells well-flushing solution wax is：By in the aqueous solution sprue bushing of Wax dissolving agent, to sleeve pipe
The wax of middle precipitation is dissolved and is cleaned.
Realize it is of the invention during, inventor find prior art at least there is problems with：
The wax separated out in sleeve pipe is all adhering closely to internal surface of sleeve pipe, the aqueous solution of the Wax dissolving agent of sprue bushing with
The wax contact area of precipitation is small, the aqueous solution of Wax dissolving agent to the wax dissolving in sleeve pipe and the effect of cleaning very
Difference, and the wax for being close to internal surface of sleeve pipe cannot be cleaned up.
The content of the invention
In order to solve problem of the prior art, a kind of paraffin scraper and heavy oil wells well-flushing are the embodiment of the invention provides
The method for solving wax.The technical scheme is as follows：
On the one hand, a kind of paraffin scraper is the embodiment of the invention provides, the paraffin scraper includes：
Connecting tube, the two ends of connecting tube are used to be connected with oil pipe；And
Paraffin cutting cylinder, paraffin cutting cylinder includes big end, small end and the circular conical surface for connecting big end and small end, paraffin cutting
The small end of device is sleeved in connecting tube, and the big end of paraffin cutting cylinder is used to be fitted in internal surface of sleeve pipe, and circular conical surface is provided with
Multiple opening.
Alternatively, connecting tube is located at outside paraffin cutting cylinder and is provided with multiple through holes on the tube wall of paraffin scraper small end.
Alternatively, multiple through holes surround and are uniformly arranged on the tube wall of connecting tube.
Alternatively, multiple split rings around and be uniformly arranged on paraffin cutting cylinder circular conical surface on.
Alternatively, the edge at the big end of paraffin cutting cylinder is provided with cutting edge.
On the other hand, the embodiment of the present invention additionally provides a kind of method of heavy oil wells well-flushing solution wax, methods described
Including：
Whether S10, judge the distance of thick oil well mouth to the wax section bottom of heavy oil wells middle sleeve less than viscous crude
OIH pipe bottom to viscous crude bottom distance；
S20, when S10 is when being judged as YES, installs described paraffin scraper on the oil pipe at thick oil well mouth,
The small end of the paraffin scraper is located at the top at big end；
S30, by paraffin scraper with entering sleeve pipe under oil pipe, and carries out paraffin cutting to the wax section in sleeve pipe；
Heavy oil wells are circulated well-flushing by S40, and the wax that paraffin scraper is struck off extracts heavy oil wells out.
Alternatively, heavy oil wells are circulated well-flushing by S40, and the wax that paraffin scraper is struck off extracts heavy oil wells out,
Including：
S41, to the aqueous solution that Wax dissolving agent is injected in the sleeve pipe of heavy oil wells, the aqueous solution of Wax dissolving agent scrapes paraffin scraper
The wax dissolving for removing；
S42, the aqueous solution that will be dissolved with wax by the through hole on paraffin scraper is pumped into oil pipe, and will by oil pipe
The aqueous solution for being dissolved with wax extracts heavy oil wells out.
Alternatively, the aqueous temperature of the Wax dissolving agent of sprue bushing is between 60 degrees Celsius to 97 degrees Celsius.
Alternatively, methods described also includes：
S11, when S10 is when being judged as NO, pulls up heavy oil wells inner oil tube, makes thick oil well mouth to viscous crude
Well middle sleeve wax section bottom distance less than heavy oil wells inner oil tube bottom to viscous crude bottom away from
From entering back into S20.
Alternatively, methods described also includes：
S50, repeats to carry out paraffin cutting to the wax section of sleeve pipe using paraffin scraper；
S60, stop in sleeve pipe inject Wax dissolving agent the aqueous solution, and from heavy oil wells flowline.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
The wax that be will be attached to by paraffin scraper on internal surface of sleeve pipe is struck off so that wax is separated with internal surface of sleeve pipe,
Again to the aqueous solution that Wax dissolving agent is injected in sleeve pipe, the face of the aqueous solution of the wax contact Wax dissolving agent for sleeve pipe separate
Product is larger, improves dissolving and cleaning performance of the aqueous solution of Wax dissolving agent to wax, dissolves the aqueous solution of wax
Heavy oil wells can be extracted out by paraffin scraper again, reach the purpose of circulation well cleanup；Meanwhile, this method also will attachment
Stickiness in sleeve pipe viscous crude high extracts heavy oil wells out.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, institute in being described to embodiment below
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of paraffin scraper structural representation that the embodiment of the present invention one is provided；
Fig. 2 is a kind of method flow diagram of heavy oil wells well-flushing solution wax that the embodiment of the present invention two is provided；
Fig. 3 is a kind of construction schematic diagram of the method for heavy oil wells well-flushing solution wax that the embodiment of the present invention two is provided；
Fig. 4 is a kind of method flow diagram of heavy oil wells well-flushing solution wax that the embodiment of the present invention two is provided；
Fig. 5 is a kind of method flow diagram of heavy oil wells well-flushing solution wax that the embodiment of the present invention two is provided；
Fig. 6 is a kind of method flow diagram of heavy oil wells well-flushing solution wax that the embodiment of the present invention two is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Implementation method is described in further detail.
Embodiment one
A kind of paraffin scraper 1 is the embodiment of the invention provides, referring to Fig. 1, the paraffin scraper 1 includes：
Connecting tube 11, the two ends of connecting tube 11 are used to be connected with oil pipe；And
Paraffin cutting cylinder 12, paraffin cutting cylinder 12 includes big end, small end and the circular conical surface for connecting big end and small end,
The small end of paraffin scraper 1 is sleeved in connecting tube 11, and the big end of paraffin cutting cylinder 12 is used to be fitted in internal surface of sleeve pipe,
Circular conical surface is provided with multiple openings 121.
In the application of the present embodiment, connecting tube 11 is connected near one end of paraffin cutting 12 small ends of cylinder with oil pipe,
The other end of connecting tube 11 can choose whether connected pipes according to actual application environment, i.e., when being disposed with oil well
During oil pipe, the other end of connecting tube 11 can be connected with the oil pipe in oil well；The connecting tube 11 of paraffin scraper 1
After being connected with oil pipe, during paraffin scraper 1 stretched into the sleeve pipe of oil well by oil pipe, and the big of paraffin cutting cylinder 12 is ensured
End carries out paraffin cutting positioned at the lower section of small end, the big end of paraffin cutting cylinder 12 to the inwall of sleeve pipe.
The present embodiment, paraffin cutting is carried out by the big end of paraffin cutting cylinder 12 to the inwall of sleeve pipe, with paraffin cutting cylinder 12
Lower section, will be disengaged from opening 121 of the wax press-in of sleeve pipe on the circular conical surface of paraffin cutting cylinder 12, and enter
The opposite side of paraffin cutting cylinder 12 so that the wax for departing from sleeve pipe will not scraping to paraffin cutting 12 pairs of inwalls of sleeve pipe of cylinder
Wax is impacted.
Alternatively, connecting tube 11 is located at outside paraffin cutting cylinder 12 and is provided with the tube wall of the small end of paraffin scraper 1
Multiple through holes 111.
By being located at outside paraffin cutting cylinder 12 and being close on the tube wall of the small end of paraffin scraper 1 in connecting tube 11, through hole is set
111, the exterior space of connecting tube 11 can be connected oil pipe, when the wax that paraffin cutting cylinder 12 strikes off is dissolved in Wax dissolving agent
The aqueous solution after, can by the aqueous solution containing wax pass through the tapped oil tube side-by-side producing well of through hole 111.
Alternatively, multiple through holes 111 surround and are uniformly arranged on the tube wall of connecting tube 11.
Alternatively, multiple openings 121 surround and are uniformly arranged on the circular conical surface of paraffin cutting cylinder 12.
Alternatively, the edge at the big end of paraffin cutting cylinder 12 is provided with cutting edge；The edge at the big end of paraffin cutting cylinder 12 is set
Cutting edge can be more quickly and efficiently to being attached to internal surface of sleeve pipe wax strike off, meanwhile, Ke Yiyou
Effect reduces the resistance for being attached to the wax of internal surface of sleeve pipe to the big end of paraffin cutting cylinder 12.
Alternatively, connecting tube 11 can be connected by joint 13 with oil pipe.
In the present embodiment, cutting edge is set by the edge at the big end of paraffin cutting cylinder 12 so that paraffin cutting cylinder 12 is big
Hold the effect of paraffin cutting more preferably, be located at outside paraffin cutting cylinder 12 and near the small end of paraffin scraper 1 by connecting tube 11
Tube wall on set through hole 111 can by the aqueous solution containing wax by the tapped oil tube side-by-side of through hole 111 it is fuel-displaced
Well；The simple structure of this paraffin scraper 1, easy to use, the paraffin cutting effect to internal surface of sleeve pipe is preferable.
Embodiment two
The embodiment of the present invention additionally provides a kind of method of heavy oil wells well-flushing solution wax, described referring to Fig. 2 and Fig. 3
Method includes：
Whether S10, judge the distance of thick oil well mouth to the wax section bottom of heavy oil wells middle sleeve 2 less than thick
The bottom of oil well inner oil tube 3 to viscous crude bottom distance；
S20, when S10 is when being judged as YES, installs such as the institute of embodiment one on the oil pipe 3 at thick oil well mouth
The paraffin scraper 1 stated, the small end of paraffin scraper 1 is located at the top at big end；
S30, by paraffin scraper 1 with entering sleeve pipe 2 under oil pipe 3, and carries out paraffin cutting to the wax section in sleeve pipe 2；
Heavy oil wells are circulated well-flushing by S40, and the wax that paraffin scraper 1 is struck off extracts heavy oil wells out.
In the present embodiment, by determining thick oil well mouth to the wax section bottom of heavy oil wells middle sleeve 2
Distance of the distance less than the bottom of heavy oil wells inner oil tube 3 to viscous crude bottom, it is ensured that at thick oil well mouth
Paraffin scraper 1 can reach the wax section bottom of sleeve pipe 2 with oil pipe 3 so that paraffin scraper 1 can strike off whole
It is attached to the wax of the inwall of sleeve pipe 2.
In the present embodiment, paraffin scraper 1 can rely on the wax that the weight of oil pipe 3 will be attached on the inwall of sleeve pipe 2 to scrape
Remove so that wax is separated with the inwall of sleeve pipe 2, this process is to be capable of achieving without additional other power sources, is used
It is convenient, to the wax contact Wax dissolving agent for after the aqueous solution that Wax dissolving agent is injected in sleeve pipe 2, with sleeve pipe 2 separate
The area of the aqueous solution is larger, improves dissolving and cleaning performance of the aqueous solution of Wax dissolving agent to wax, and also will
Wax on the inwall of sleeve pipe 2 is cleaned up.
Referring to Fig. 3 and Fig. 4, alternatively, S40 is circulated well-flushing to heavy oil wells, and paraffin scraper 1 is struck off
Wax extract out heavy oil wells, including：
S41, to the aqueous solution that Wax dissolving agent is injected in the sleeve pipe 2 of heavy oil wells, the aqueous solution of Wax dissolving agent is by paraffin scraper
The 1 wax dissolving struck off；
S42, the aqueous solution that will be dissolved with wax by the through hole 111 on paraffin scraper 1 is pumped into oil pipe 3, and leads to
Cross the aqueous solution extraction heavy oil wells that oil pipe 3 will be dissolved with wax；
Referring to Fig. 4, inlet 21 is respectively provided with the sleeve pipe 2 and oil pipe 3 at thick oil well mouth and goes out liquid
Mouth 31, connects pump truck pipeline on inlet 21, by pump truck pipeline to the water that Wax dissolving agent is injected in sleeve pipe 2
Solution, transfer tube is connected in liquid outlet 31, is taken out the aqueous solution that wax is dissolved with sleeve pipe 2 by transfer tube
Go out heavy oil wells.
Alternatively, when the aqueous temperature of Wax dissolving agent is less than 60 degrees Celsius, the aqueous solution of Wax dissolving agent is to wax
The effect of dissolving is poor, when the aqueous temperature of Wax dissolving agent is more than 97 degrees Celsius, temperature Wax dissolving agent higher
The aqueous solution be likely to result in viscous crude detonation in heavy oil wells, there is security incident；Therefore, sprue bushing 2
The aqueous temperature of Wax dissolving agent is between 60 degrees Celsius to 97 degrees Celsius.
Referring to Fig. 5, alternatively, method also includes：
S11, when S10 is when being judged as NO, pulls up heavy oil wells inner oil tube 3, makes thick oil well mouth to thick
The distance of the wax section bottom of oil well middle sleeve 2 is less than the bottom of heavy oil wells inner oil tube 3 to viscous crude bottom
Distance, enter back into S20；
Before paraffin scraper 1 is installed, it is that guarantee ensure that thick oil well mouth to pull up heavy oil wells inner oil tube 3
The paraffin scraper 1 at place can reach the wax section bottom of sleeve pipe 2 with oil pipe 3, complete paraffin cutting.
Alternatively, be quickly to realize rising or lower drain line 3 in subsequent operation before S11, can first by
Sucker rod in oil pipe 3 rises；It should be noted that being difficult out in oil pipe 3 if there is sucker rod
Situation, can not from oil pipe 3 go out sucker rod.
Referring to Fig. 6, alternatively, method also includes：
S50, repeats to carry out paraffin cutting to the wax section of sleeve pipe 2 using paraffin scraper 1；
S60, stop in sleeve pipe 2 inject Wax dissolving agent the aqueous solution, and from heavy oil wells flowline 3；
Paraffin scraper 1 is driven to realize that paraffin scraper 1 repeats the wax to sleeve pipe 2 by driving oil pipe 3, oil pipe 3 up and down
Matter section carries out paraffin cutting, reaches the purpose for thoroughly removing the wax being attached on the inwall of sleeve pipe 2；Complete to sleeve pipe 2
After the paraffin removal of inwall, you can stop in sleeve pipe 2 inject Wax dissolving agent the aqueous solution, from heavy oil wells it is fuel-displaced
Pipe 3, lower paraffin scraper 1 can be dismantled after playing flowline 3, if being attached with wax on oil pipe 3, also can be thick
Oil well is outer to be purged to being attached with wax on oil pipe 3.
The present embodiment, installs paraffin scraper 1 on oil pipe 3, paraffin scraper 1 relies on the weight of oil pipe 3 to will be attached to sleeve pipe
Wax on 2 inwalls is struck off, easy to use without additional other power sources, then to injecting 60 in sleeve pipe 2
Degree Celsius the wax in sleeve pipe 2 is dissolved to the aqueous solution of 97 degrees Celsius of Wax dissolving agent, improve molten wax
Dissolving and cleaning performance of the aqueous solution of agent to wax, the aqueous solution for dissolving wax can be taken out by paraffin scraper 1 again
Go out heavy oil wells, reach the purpose of circulation well cleanup；Meanwhile, this method also will be attached to sticky in sleeve pipe 2
Degree viscous crude high extracts heavy oil wells out, it is therefore prevented that because of viscous crude, accumulation excessively occurs detonation in sleeve pipe 2, ensures
The job safety of heavy oil wells.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all of the invention
Within spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in of the invention
Within protection domain.
Claims (10)
1. a kind of paraffin scraper, it is characterised in that the paraffin scraper includes：
Connecting tube, the two ends of the connecting tube are used to be connected with oil pipe；And
Paraffin cutting cylinder, the paraffin cutting cylinder includes big end, small end and the circular conical surface for connecting big end and small end,
The small end of the paraffin scraper is sleeved in the connecting tube, and the big end of the paraffin cutting cylinder is used to be fitted in sleeve pipe
On wall, the circular conical surface is provided with multiple openings.
2. paraffin scraper according to claim 1, it is characterised in that the connecting tube is located at the paraffin cutting
Multiple through holes are provided with outside cylinder and on the tube wall of the paraffin scraper small end.
3. paraffin scraper according to claim 2, it is characterised in that the multiple through hole around and it is uniform
It is arranged on the tube wall of the connecting tube.
4. paraffin scraper according to claim 1, it is characterised in that the multiple split ring around and it is uniform
It is arranged on the circular conical surface of the paraffin cutting cylinder.
5. paraffin scraper according to claim 1, it is characterised in that the edge at the big end of paraffin cutting cylinder sets
It is equipped with cutting edge.
6. a kind of method of heavy oil wells well-flushing solution wax, it is characterised in that methods described includes：
S10, judges whether thick oil well mouth to the distance of the wax section bottom of the heavy oil wells middle sleeve is less than
The heavy oil wells inner oil tube bottom to the viscous crude bottom distance；
S20, when S10 is when being judged as YES, installs such as claim on the oil pipe at the thick oil well mouth
Paraffin scraper described in any one of 1-5, the small end of the paraffin scraper is located at the top at big end；
S30, by the paraffin scraper with entering described sleeve pipe under the oil pipe, and to the wax section in described sleeve pipe
Carry out paraffin cutting；
The heavy oil wells are circulated well-flushing by S40, and the wax that the paraffin scraper is struck off extracts the viscous crude out
Well.
7. the heavy oil wells are followed by method according to claim 6, it is characterised in that S40
Washing-round well, the wax that the paraffin scraper is struck off extracts the heavy oil wells out, including：
S41, to the aqueous solution that Wax dissolving agent is injected in the sleeve pipe of the heavy oil wells, the aqueous solution of the Wax dissolving agent will
The wax dissolving that the paraffin scraper strikes off；
S42, the aqueous solution that will be dissolved with wax by the through hole on the paraffin scraper is pumped into the oil pipe, and leads to
Cross the oil pipe and extract the aqueous solution for being dissolved with wax out the heavy oil wells.
8. method according to claim 7, it is characterised in that the Wax dissolving agent of injection described sleeve pipe
Aqueous temperature between 60 degrees Celsius to 97 degrees Celsius.
9. method according to claim 6, it is characterised in that methods described also includes：
S11, when S10 is when being judged as NO, pulls up the heavy oil wells inner oil tube, makes the heavy oil wells well
Mouth to the distance of the wax section bottom of the heavy oil wells middle sleeve is less than the heavy oil wells inner oil tube bottom extremely
The distance of the viscous crude bottom, enters back into S20.
10. method according to claim 6, it is characterised in that methods described also includes：
S50, repeats to carry out paraffin cutting to the wax section of described sleeve pipe using the paraffin scraper；
S60, stops to the aqueous solution that the Wax dissolving agent is injected in described sleeve pipe, and from the heavy oil wells go out
The oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997942.6A CN106917601B (en) | 2015-12-26 | 2015-12-26 | Wax scraper and method for washing and dewaxing heavy oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997942.6A CN106917601B (en) | 2015-12-26 | 2015-12-26 | Wax scraper and method for washing and dewaxing heavy oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106917601A true CN106917601A (en) | 2017-07-04 |
| CN106917601B CN106917601B (en) | 2019-03-15 |
Family
ID=59455081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510997942.6A Active CN106917601B (en) | 2015-12-26 | 2015-12-26 | Wax scraper and method for washing and dewaxing heavy oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106917601B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219167A (en) * | 2019-11-13 | 2020-06-02 | 牡丹江天庆石油机械设备有限公司 | Oil field prevents hindering hole enlargement paraffin scraper |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB663675A (en) * | 1949-07-12 | 1951-12-27 | Joseph Caslake Junior | Improvements in or relating to devices for scratching or brushing the walls of bores |
| CN1121981A (en) * | 1993-06-16 | 1996-05-08 | 井流技术有限公司 | Well wall cleaning tool with scrap element |
| CN2623870Y (en) * | 2003-04-21 | 2004-07-07 | 李建忠 | Novel paraffin cleaner for pumping well |
| CN2663650Y (en) * | 2003-10-13 | 2004-12-15 | 郝柏树 | Paraffin cutting cleaner for pumping well |
| US20090272524A1 (en) * | 2008-05-02 | 2009-11-05 | Voth Rickey C | Method and apparatus for cleaning internal surfaces of downhole casing strings and other tubular goods |
| CN204754873U (en) * | 2015-05-19 | 2015-11-11 | 长江大学 | Belt cleaning device is scraped to sleeve pipe |
| CN204804775U (en) * | 2015-06-18 | 2015-11-25 | 中国石油化工股份有限公司 | A wax section of thick bamboo is scraped to oil gas well wax removal |
-
2015
- 2015-12-26 CN CN201510997942.6A patent/CN106917601B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB663675A (en) * | 1949-07-12 | 1951-12-27 | Joseph Caslake Junior | Improvements in or relating to devices for scratching or brushing the walls of bores |
| CN1121981A (en) * | 1993-06-16 | 1996-05-08 | 井流技术有限公司 | Well wall cleaning tool with scrap element |
| CN2623870Y (en) * | 2003-04-21 | 2004-07-07 | 李建忠 | Novel paraffin cleaner for pumping well |
| CN2663650Y (en) * | 2003-10-13 | 2004-12-15 | 郝柏树 | Paraffin cutting cleaner for pumping well |
| US20090272524A1 (en) * | 2008-05-02 | 2009-11-05 | Voth Rickey C | Method and apparatus for cleaning internal surfaces of downhole casing strings and other tubular goods |
| CN204754873U (en) * | 2015-05-19 | 2015-11-11 | 长江大学 | Belt cleaning device is scraped to sleeve pipe |
| CN204804775U (en) * | 2015-06-18 | 2015-11-25 | 中国石油化工股份有限公司 | A wax section of thick bamboo is scraped to oil gas well wax removal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111219167A (en) * | 2019-11-13 | 2020-06-02 | 牡丹江天庆石油机械设备有限公司 | Oil field prevents hindering hole enlargement paraffin scraper |
| CN111219167B (en) * | 2019-11-13 | 2021-11-09 | 牡丹江天庆石油机械设备有限公司 | Oil field prevents hindering hole enlargement paraffin scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106917601B (en) | 2019-03-15 |
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