CA2706765A1 - Down-hole well-bore pigging and scale trap wire line - Google Patents
Down-hole well-bore pigging and scale trap wire line Download PDFInfo
- Publication number
- CA2706765A1 CA2706765A1 CA 2706765 CA2706765A CA2706765A1 CA 2706765 A1 CA2706765 A1 CA 2706765A1 CA 2706765 CA2706765 CA 2706765 CA 2706765 A CA2706765 A CA 2706765A CA 2706765 A1 CA2706765 A1 CA 2706765A1
- Authority
- CA
- Canada
- Prior art keywords
- tubing
- pigging
- wellbore
- wire line
- rod
- 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.)
- Abandoned
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000007790 scraping Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001684 chronic effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Abstract
This invention is on the ideas and equipment to be applied to clean, namely pig the downhole wellbore tubing and rod by a set of special equipment tripping periodically in wells with or without rods. This method can do the daily wellbore maintenance and lengthen the run time of wells substantially. A scale or wax trap steel wire line is included in this invention too, trying to solve similar issues.
Description
Down-hole Well-bore Pigging and Scale Trap Wire Line Zhong (Gilbert) Chen 165 Millrise Close, SW, CALGARY, ALBERTA, CANADA, T2Y 2T4 Gilbertchen168(cD-yahoo.com, 403-988-2899 Description In the processes of water or oil production, the downhole wellbores are often liable to organic and in-organic precipitates and deposits. These precipitates and deposits are sometimes called scales and usually cause much difficulty and extra high cost to maintain the downhole wellbores. In order to maintain production, the wellbores have to be cleaned.
Current downhole wellbore cleaning methods and measures taken are regular well workovers and operations when the wells fail. The cost for workovers and operations are very high and the wells have to be shut in to perform the workovers and operations. Several days are needed to finish those pieces of work. Regular failures of wells due to the scale related issues and regular downtime and regular workovers, operations cause many troubles for related oil and gas companies.
Pigging is an old topic. However, even though pigging has been widely applied in surface and underwater pipelines and associated sets of equipment, pigging has never been applied in downhole wellbores to clean the scales and deposits on the daily bases. From the scaling mechanisms, long term contact, accumulation of scaling substances on tubing and rod attributes to the final failures. The daily or regularly running of downhole wellbore pigging can prevent the chronic accumulation of scaling substances on tubing and rod. Therefore, the scaling substances can be produced to the surface to be treated and the downhole wellbore can be protected from regular failures. The successful application of this idea and associated pigging device can save a lot of time, energy and cost for related oil and gas companies.
A second idea included in this invention is the application of a intertwined or braided steel wire line or cable into the annulus or in the tubing to stimulate the scaling substance accumulation on the braided wire line or cable. The braided wire line or cable can be hoisted periodically from the well bore to be cleaned and then be re-used in the well bore again.
In order to search information on related inventions, the patent database was inquired by inputting key words: pigging, wellbore cleaning, downhole pigging, wellbore pigging, braided wire line, braided cable, intertwined wire line, and intertwined cable. The following are the patent database inquiry results:
By inputting key word pigging: 25 documents were listed out of 2,032,537 patents matched the query. However, none of the existent patent deals with the downhole wellbore pigging as stated in this invention.
By inputting key word wellbore cleaning: 6 documents were listed out of 2,032,537 patents matched the query. However, they all deal with the one time downhole workover and operation and have nothing to do with the ideas and device in this invention.
By inputting key word wellbore pigging: No patents were found matching the query.
By inputting key word downhole pigging: No patents were found matching the query, either.
By inputting key word braided wire line: No patents were found matching the query.
By inputting key word braided cable: 13 documents were listed. No patents dealt with the invented idea in this invention.
By inputting key word intertwined wire line: No patents were found matching the query.
By inputting key word intertwined cable: No patents were found matching the query, either.
Therefore, the comprehensive database query and comparison demonstrated that no patents deal with the downhole wellbore pigging and associated devices.
No patents deal with the downhole wellbore braided, intertwined cable or wire line to trap the scaling substances and wax. Once the braided cable, wire line or meshed steel strap is placed in the wellbore, no matter in the annulus or in the tubing, the scaling substances or wax will adhere to it and accumulate around the cable, wire line or meshed strap. This scaling process will protect the tubing and rod from being scaled off. These creative ideas and device dealt with in this invention is innovative and have the ingenuity.
Drawing This invention raised the idea to apply pigging in downhole wellbores and listed five important principles or requirements for downhole wellbore pigging device.
The proposed concept device single unit is in the drawing Figure.
One is that the device should brush and scrape off the soft, semi-solid scaling substances from the inside surfaces of tubing.
Second is that the device should have a center hole to slide through the rod if the rod is used for PCP pumps. Around the center hole, brush should be installed inside the device to remove the scaling substances around the rod.
Third is that the device should have a receptacle connected to the brushing, scraping part to collect the suspending substances off the surfaces of tubing and rods. The receptacle should have a mesh structure with one way for solids to be retained and fluid flowing through it.
Fourth is that the device should be flexible to be applied not only in vertical wells, but also in direction wells and even horizontal wells.
Fifth is that the pigging device can be retrieved and checked regularly if necessary to unload the retained substances and do the cleaning of the device itself or replacement of some parts.
The invented idea to use braided, intertwined cable or wire line, or meshed steel strap to trap the scaling substances and wax in the downhole wellbore is very simple and straightforward.
Description of the drawing of the concept downhole pigging device 1: Downhole casing 2: Downhole weilbore tubing 3: Rod for driving the pumps 4: Pigging part with brush and scraper 5: Outside brush or scraper to clean inside surface of tubing 6: Inside brush or scraper to clean the rod 7: Scaling substance receptacle with meshes and one way opening 8: Ball wheels making the unit slide and move upward, downward 9: Closed route steel wire line to move the pigging device 10: Wheels to help wire line movement
Current downhole wellbore cleaning methods and measures taken are regular well workovers and operations when the wells fail. The cost for workovers and operations are very high and the wells have to be shut in to perform the workovers and operations. Several days are needed to finish those pieces of work. Regular failures of wells due to the scale related issues and regular downtime and regular workovers, operations cause many troubles for related oil and gas companies.
Pigging is an old topic. However, even though pigging has been widely applied in surface and underwater pipelines and associated sets of equipment, pigging has never been applied in downhole wellbores to clean the scales and deposits on the daily bases. From the scaling mechanisms, long term contact, accumulation of scaling substances on tubing and rod attributes to the final failures. The daily or regularly running of downhole wellbore pigging can prevent the chronic accumulation of scaling substances on tubing and rod. Therefore, the scaling substances can be produced to the surface to be treated and the downhole wellbore can be protected from regular failures. The successful application of this idea and associated pigging device can save a lot of time, energy and cost for related oil and gas companies.
A second idea included in this invention is the application of a intertwined or braided steel wire line or cable into the annulus or in the tubing to stimulate the scaling substance accumulation on the braided wire line or cable. The braided wire line or cable can be hoisted periodically from the well bore to be cleaned and then be re-used in the well bore again.
In order to search information on related inventions, the patent database was inquired by inputting key words: pigging, wellbore cleaning, downhole pigging, wellbore pigging, braided wire line, braided cable, intertwined wire line, and intertwined cable. The following are the patent database inquiry results:
By inputting key word pigging: 25 documents were listed out of 2,032,537 patents matched the query. However, none of the existent patent deals with the downhole wellbore pigging as stated in this invention.
By inputting key word wellbore cleaning: 6 documents were listed out of 2,032,537 patents matched the query. However, they all deal with the one time downhole workover and operation and have nothing to do with the ideas and device in this invention.
By inputting key word wellbore pigging: No patents were found matching the query.
By inputting key word downhole pigging: No patents were found matching the query, either.
By inputting key word braided wire line: No patents were found matching the query.
By inputting key word braided cable: 13 documents were listed. No patents dealt with the invented idea in this invention.
By inputting key word intertwined wire line: No patents were found matching the query.
By inputting key word intertwined cable: No patents were found matching the query, either.
Therefore, the comprehensive database query and comparison demonstrated that no patents deal with the downhole wellbore pigging and associated devices.
No patents deal with the downhole wellbore braided, intertwined cable or wire line to trap the scaling substances and wax. Once the braided cable, wire line or meshed steel strap is placed in the wellbore, no matter in the annulus or in the tubing, the scaling substances or wax will adhere to it and accumulate around the cable, wire line or meshed strap. This scaling process will protect the tubing and rod from being scaled off. These creative ideas and device dealt with in this invention is innovative and have the ingenuity.
Drawing This invention raised the idea to apply pigging in downhole wellbores and listed five important principles or requirements for downhole wellbore pigging device.
The proposed concept device single unit is in the drawing Figure.
One is that the device should brush and scrape off the soft, semi-solid scaling substances from the inside surfaces of tubing.
Second is that the device should have a center hole to slide through the rod if the rod is used for PCP pumps. Around the center hole, brush should be installed inside the device to remove the scaling substances around the rod.
Third is that the device should have a receptacle connected to the brushing, scraping part to collect the suspending substances off the surfaces of tubing and rods. The receptacle should have a mesh structure with one way for solids to be retained and fluid flowing through it.
Fourth is that the device should be flexible to be applied not only in vertical wells, but also in direction wells and even horizontal wells.
Fifth is that the pigging device can be retrieved and checked regularly if necessary to unload the retained substances and do the cleaning of the device itself or replacement of some parts.
The invented idea to use braided, intertwined cable or wire line, or meshed steel strap to trap the scaling substances and wax in the downhole wellbore is very simple and straightforward.
Description of the drawing of the concept downhole pigging device 1: Downhole casing 2: Downhole weilbore tubing 3: Rod for driving the pumps 4: Pigging part with brush and scraper 5: Outside brush or scraper to clean inside surface of tubing 6: Inside brush or scraper to clean the rod 7: Scaling substance receptacle with meshes and one way opening 8: Ball wheels making the unit slide and move upward, downward 9: Closed route steel wire line to move the pigging device 10: Wheels to help wire line movement
Claims (7)
1. The downhole wellbore pigging process or operation is applied to clean the rod or tubing in wellbore, no matter what well it is
2. Associated pigging device that has brush or scraper to remove scaling substances off the inside surface of tubing or the outside surface of tubing.
3. Associated pigging device that has hole to slide through the rod or tubing, and has brush or scraper to remove scaling substances off the outside surface of tubing and the outside surface of rod.
4. Associated pigging device that has a receptacle connected to the brushing, scraping part to collect the suspending substances off the surfaces of tubing and rods. The receptacle has a mesh or similar structure with one way for solids to enter and be retained and fluid flowing through it. The receptacle has bigger diameter with ball wheels touching the inside of tubing and has the sliding function to move upward and downward.
5. Associated structure to make pigging device flexible to be applied not only in vertical wells, but also in direction wells and even horizontal wells. The structure similar to caterpillar or jointed train cars is used to make the device flexible.
6. Associated design to realize the periodical trip of the pigging device in the wellbore to remove the scaling substances. And device that can make the pig be retrieved and checked regularly if necessary to unload the retained substances and do the cleaning of the device itself or replacement of some parts.
7. The process or operation to install braided cable, wire line or meshed steel strap in the wellbore, no matter in the annulus or in the tubing, no matter what the exact design or structure of the cable, wire line or strap is, the purpose is to let the scaling substances or wax adhere to it and accumulate there, the purpose is to protect the tubing and rod and other down hole devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2706765 CA2706765A1 (en) | 2010-06-03 | 2010-06-03 | Down-hole well-bore pigging and scale trap wire line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2706765 CA2706765A1 (en) | 2010-06-03 | 2010-06-03 | Down-hole well-bore pigging and scale trap wire line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2706765A1 true CA2706765A1 (en) | 2011-12-03 |
Family
ID=45066015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2706765 Abandoned CA2706765A1 (en) | 2010-06-03 | 2010-06-03 | Down-hole well-bore pigging and scale trap wire line |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2706765A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368650A (en) * | 2016-11-18 | 2017-02-01 | 河北华盟机械制造有限公司 | Multifunctional oil scraping and wax removing device for sucker rod |
| CN108729879A (en) * | 2017-04-17 | 2018-11-02 | 中国石油化工股份有限公司 | A kind of Casing Failure inner wall scrapes fishing integrated tool and method |
| CN110761741A (en) * | 2019-10-15 | 2020-02-07 | 大庆油田有限责任公司 | Mechanical oil pipe pricking and washing device |
| CN111663933A (en) * | 2019-03-07 | 2020-09-15 | 中国石油天然气股份有限公司 | Safety protection device for well testing steel wire |
-
2010
- 2010-06-03 CA CA 2706765 patent/CA2706765A1/en not_active Abandoned
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368650A (en) * | 2016-11-18 | 2017-02-01 | 河北华盟机械制造有限公司 | Multifunctional oil scraping and wax removing device for sucker rod |
| CN108729879A (en) * | 2017-04-17 | 2018-11-02 | 中国石油化工股份有限公司 | A kind of Casing Failure inner wall scrapes fishing integrated tool and method |
| CN108729879B (en) * | 2017-04-17 | 2020-07-31 | 中国石油化工股份有限公司 | Scraping, washing and fishing integrated tool and method for inner wall of oil-water well casing |
| CN111663933A (en) * | 2019-03-07 | 2020-09-15 | 中国石油天然气股份有限公司 | Safety protection device for well testing steel wire |
| CN111663933B (en) * | 2019-03-07 | 2023-04-25 | 中国石油天然气股份有限公司 | Safety protection device for well testing steel wire |
| CN110761741A (en) * | 2019-10-15 | 2020-02-07 | 大庆油田有限责任公司 | Mechanical oil pipe pricking and washing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20130604 |