CN202914039U - Hydraulic type sleeve scraper - Google Patents
Hydraulic type sleeve scraper Download PDFInfo
- Publication number
- CN202914039U CN202914039U CN 201220524030 CN201220524030U CN202914039U CN 202914039 U CN202914039 U CN 202914039U CN 201220524030 CN201220524030 CN 201220524030 CN 201220524030 U CN201220524030 U CN 201220524030U CN 202914039 U CN202914039 U CN 202914039U
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- scraper
- piston
- dovetail groove
- axial
- latus rectum
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- Withdrawn - After Issue
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Abstract
The utility model provides a hydraulic type sleeve scraper and aims at overcoming the shortcoming that an existing sleeve scraper is small in scrapping force. A hydraulic type sleeve scraper body, a scraper seat and a diameter body are sequentially and fixedly connected from top to bottom. The upper end portion of the scraper seat is a radial dovetail groove. An inner hole of the diameter body is a big-end-down stepped hole. A piston and a guide tube are sequentially installed between an upper connector of an inner hole of the body and the diameter body from top to bottom, and a spring is axially installed on an excircle of the guide tube. The diameter of the lower end portion of the diameter body, the guide tube and an inner hole of the piston is smaller than that of the inner hole of the upper connector. The lower end portion of the piston is provided with an axial dovetail groove. The lower end portion of the scraper is provided with a dovetail matched with the radial dovetail groove at the upper end portion of the scraper seat, and the inner side of the upper end portion of the scraper is provided with a dovetail matched with the axial dovetail groove of the piston. The hydraulic type sleeve scraper has the advantage of being reasonable in structure and stable and adjustable in hydraulic force, finishing pigging and scrapping in one-time operation, simplifying construction steps and reducing stratum pollution.
Description
Technical field
The utility model relates to a kind of oil and gas development underground work and scrapes the kit of washing casing operation, especially relates to a kind of hydraulic casing scraper.
Background technology
In the oil and gas development operation process, the jagged existence of the preforation tunnel of internal surface of sleeve pipe, shutoff and change in the stifled operation and residual in sleeve pipe cement, blocking agent etc., absorption dead oil, dead wax etc. in the oil recovery manufacturing process middle sleeve to be arranged.Therefore, remove the above-mentioned foreign matter workover treatment that retains in the internal surface of sleeve pipe and normal important process content in the underground work, for being lowered to smoothly packer and other downhole tool has important effect.
At present, the instrument that sleeve pipe scraping employing is carried out in underground work is to utilize the elastic force of spring that blade is close on the casing wall, realizes striking off internal surface of sleeve pipe burr, fouling by up and down tubing string, sticks the purpose of thing.
Disclosed Chinese utility model patent on January 18 " Multi-functional casing scraper " (publication number CN202117633U) in 2012, rectangular recess is arranged on the outer wall of body vertically, be embedded with knife plate in each rectangular recess, knife plate and rectangular recess are slidingly matched; Two ends in rectangular recess are fixed with respectively baffle plate, and 2～5 Compress Springs are arranged in the bottom of rectangular recess.There is external screw thread lower end at body, and the lower end of body is connected with the latus rectum body.The latus rectum body is that cylindrical has centre bore, and the external diameter of latus rectum body lower end is than the little 1～2mm of casing inner diameter.During application first by the latus rectum body by internal surface of sleeve pipe, root out fouling, wax deposition in the sleeve pipe, after again the knife plate by scraper to carrying out omnibearing scraping in the sleeve pipe.
Disclosed Chinese utility model patent on August 11 " high-efficiency hydraulic-booster casing scraper " (publication number CN201546680U) in 2010 is comprised of scraping main body and pressure regulator two parts.Its integral body is the cylindrical tube body structure, scraping body shell upper end is provided with internal thread, the lower end is provided with external screw thread, the housing center is provided with axially extending bore, respectively be provided with three in the circumferential same plane of housing upper and lower part and scrape piece, each is scraped piece and differs respectively 120 °, the upper and lower piece intersection of scraping staggers, scraping piece is embedded on the housing, fixed by upper fixed cover and lower fixed cover, scrape between piece and the housing and be provided with the gap, be provided with plunger shaft at middle part, upper and lower gap and cooperate with the piston that sealing ring is housed, plunger shaft and axially extending bore link.Scraping body shell lower end be threaded successively transition joint, valve seat, the lower contact of pressure regulator, the upward-traveling valves lower end is sitting on the lower axial through hole upper end tapered hole of lower travelling valve by valve seat, upward-traveling valves is provided with axially extending bore, the lower travelling valve bottom is provided with regulating spring, and the regulating spring bottom is provided with the adjustment seat that is threaded with lower contact.
All spring supportings by radially installing in the above-mentioned casing scraper are so that scraper block is close to the work that internal surface of sleeve pipe is finished the scraping internal surface of sleeve pipe.But owing to being subject to the restriction of spring force, often scraping power is not enough, harder cement, sand control plug ring and larger burr etc. thoroughly can not be removed.
The utility model content
Exist scraping power little in order to overcome existing casing scraper, the deficiency that cement that can not internal surface of sleeve pipe is harder, sand control plug ring and larger burr etc. are removed, the utility model provides a kind of hydraulic casing scraper.
The technical scheme that its technical problem that solves the utility model adopts is: the hydraulic casing scraper comprises scraper, body, top connection, latus rectum body, the body middle part is uniformly distributed with axial elongated slot more than 2 or 2 along the circumference, scraper outer edge section is arranged in axial elongated slot, scraper vertically elongated slot moves radially, and top connection is fixedly connected with the body upper end.Body and scraper base, latus rectum body from top to bottom are fixedly connected sequentially; Latus rectum body endoporus is up big and down small shoulder hole; The scraper base upper end is dovetail groove radially, and radially dovetail groove is positioned at body shaft to the bottom of elongated slot; Piston, mozzle from top to bottom are installed between the top connection in the body endoporus and the latus rectum body successively, and piston is fixedly connected with mozzle, and the lower end of mozzle is arranged in latus rectum body upper end endoporus; The mozzle cylindrical is axially installed with spring between latus rectum body and piston; The endoporus of latus rectum body bottom, mozzle, piston is less than the top connection diameter of bore; There is axial dovetail groove the piston lower end, and axially dovetail groove and piston axis have angle α; Axially dovetail groove is positioned at body shaft to the upper end of elongated slot;
The scraper bottom has and the scraper base upper end dovetail that matches of dovetail groove radially, and there is the dovetail that matches with the axial dovetail groove of piston inboard, scraper upper end.
Axially the angle α of dovetail groove and piston axis is 15～25 °.When the angle α of axial dovetail groove and piston axis is 20 ° of the bests.
The upper end of latus rectum body is cylinder, and the bottom is up big and down small cone.
Axial dovetail groove on the piston, scraper base upper end radially dovetail groove quantity equates, is more than 2 or 2, is uniformly distributed along the circumference, and equates with axial elongated slot quantity on the body;
When the hydraulic casing scraper was in off working state, gapped between the hole end surface in mozzle lower surface and the latus rectum body upper end, the outer edge section of scraper was positioned at the axial elongated slot of body; When the hydraulic casing scraper is in running order, piston up under the effect of hydraulic pressure along the body down sliding, scraper is radially outward mobile along the axial elongated slot of body, scraper outside blade contacts with internal surface of sleeve pipe.
The beneficial effects of the utility model are, rational in infrastructure, hydraulic coupling is steady, adjustable, guarantee that scraper can effectively remove the foreign matter on the internal surface of sleeve pipe, and drifting, scraping are finished in one-stop operation, simplify working procedure, reduce the pollution that the stratum is caused.
Description of drawings
Fig. 1 is the utility model hydraulic casing scraper structural representation.
Among the figure: 1. latus rectum body, 2. scraper base, 3. body, 4. mozzle, 5. spring, 6. scraper, 7. piston, 8. sealing ring, 9. top connection, 10. dovetail groove radially, 11. axial dovetail grooves.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.But what those skilled in the art should know is to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
The utility model hydraulic casing scraper, comprise latus rectum body 1, scraper base 2, body 3, top connection 9, scraper 6, mozzle 4, piston 7 etc., latus rectum body 1, scraper base 2, body 3, top connection 9 are fixedly connected sequentially from the bottom to top, and the external diameter nominal size of latus rectum body 1, scraper base 2, body 3 equates and is slightly less than casing inner diameter.
The upper end of latus rectum body 1 is cylinder, and the bottom is up big and down small cone, and the instrument of being convenient to is lowered in the sleeve pipe.Latus rectum body 1 endoporus is up big and down small shoulder hole.
There is axial elongated slot at body 3 middle parts, and axially the quantity of elongated slot is more than 2 or 2, and is uniformly distributed along the circumference.
Piston 7 can slide up and down along body 3 endoporus, in the annular groove of piston 7 upper ends sealing ring 8 is installed.On the piston 7 bottom cylindricals axial dovetail groove 11 is arranged, axially dovetail groove (11) is positioned at the axially upper end of elongated slot of body (3).It is 15～25 ° of best results when angle α is 20 ° that the axis of axial dovetail groove 11 and piston 7 has the common angle α of angle α.
Between the axial dovetail groove 11 of the radially dovetail groove 10 of scraper base 2 upper ends and piston 7 bottoms scraper 6 is installed, the outer edge section of scraper 6 is positioned at the axial elongated slot of body 3, and scraper 6 vertically elongated slot moves radially.Scraper 6 bottoms have and the scraper base 2 upper ends dovetail that matches of dovetail groove 10 radially, and there is the dovetail that matches with the axial dovetail groove 11 of piston 7 inboard, scraper 6 upper end.Axial dovetail groove 11, scraper base 2 upper ends radially dovetail groove 10 also can be T-shaped groove, match with T-shaped groove and get final product in scraper 6 bottoms, upper end.
The axial dovetail groove 11 of piston 7, scraper base 2 upper ends radially dovetail groove 10 quantity equate, are more than 2 or 2, are uniformly distributed along the circumference, and equate with axial elongated slot quantity on the body 3.Usually the quantity of scraper 6 is 3～6.
When the hydraulic casing scraper was in off working state, gapped between the hole end surface in mozzle 4 lower surfaces and latus rectum body 1 upper end, the outer edge section of scraper 6 was positioned at the axial elongated slot of body 3 at this moment.
When the hydraulic casing scraper is in running order, piston 7 up under the effect of hydraulic pressure along body 3 endoporus down slidings, scraper 6 along the axial dovetail groove 11 of piston 7 and scraper base 2 upper ends radially dovetail groove 10 outward radials move, the outside blade of scraper 6 is radially outward mobile from the axial elongated slot of body 3, contacts with internal surface of sleeve pipe.
The operating principle of the utility model hydraulic casing scraper is, liquid injects from the top of scraper, the liquid piston 7, mozzle 4 of flowing through produces throttlings, move down by chock pressure difference pushing piston 7, piston 7 promotes scraper 6 and moves along the inclined-plane of axial dovetail groove 11 and the dovetail groove parallel track of scraper base 2, until scraper 6 outside blades contact with internal surface of sleeve pipe.The top connection 9 of hydraulic casing scraper is installed in the lower end of helicoid hydraulic motor, and helicoid hydraulic motor drives hydraulic casing scraper rotation scraping internal surface of sleeve pipe, and the large I of scraping power is regulated by discharge capacity; When stopping filling liquid, spring 5 resets, and pushing piston 7 moves up, and scraper 6 is retracted in the axial elongated slot of body 3.
The pressure of the utility model hydraulic casing scraper is steady, scraping power is strong, and scraping power can be passed through the lifting rate size adjustment, can guarantee doctor edge contact parallel with internal surface of sleeve pipe, effectively remove the attachment in the sleeve pipe, and the larger foreign matter such as cement, sand control plug ring, and can return discharge opeing by annular space and in time clean scraper, effectively prolong the application life of scraper.The lower end of hydraulic casing scraper is equipped with the latus rectum body, can realize that drifting is finished in one-stop operation, scraping is constructed, and simplifies working procedure, reduces repeatedly the pollution that well-flushing causes the stratum, increases work efficiency.
It should be noted that above-described embodiment is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the claim scope of this patent.
Claims (6)
1. hydraulic casing scraper, comprise scraper, body, top connection, latus rectum body, the body middle part is uniformly distributed with axial elongated slot more than 2 or 2 along the circumference, scraper outer edge section is arranged in axial elongated slot, scraper vertically elongated slot moves radially, top connection is fixedly connected with the body upper end, it is characterized in that:
Described body (3) from top to bottom is fixedly connected sequentially with scraper base (2), latus rectum body (1); Latus rectum body (1) endoporus is up big and down small shoulder hole;
Described scraper base (2) upper end is dovetail groove (10) radially, and radially dovetail groove (10) is positioned at the axially bottom of elongated slot of body (3);
Piston (7), mozzle (4) from top to bottom are installed between the top connection (9) in described body (3) endoporus and the latus rectum body (1) successively, piston (7) is fixedly connected with mozzle (4), and the lower end of mozzle (4) is arranged in latus rectum body (1) upper end endoporus; Mozzle (4) cylindrical is axially installed with spring (5) and is positioned between latus rectum body (1) and the piston (7); The endoporus of latus rectum body (1) bottom, mozzle (4), piston (7) is less than top connection (9) diameter of bore;
There is axial dovetail groove (11) described piston (7) lower end, and axially dovetail groove (11) has angle α with piston (7) axis; Axially dovetail groove (11) is positioned at the axially upper end of elongated slot of body (3);
Described scraper (6) bottom has and scraper base (2) the upper end dovetail that matches of dovetail groove (10) radially, and there is the dovetail that matches with the axial dovetail groove (11) of piston (7) scraper (6) inboard, upper end.
2. described hydraulic casing scraper according to claim 1, it is characterized in that: described axial dovetail groove (11) is 15～25 ° with the angle α of piston (7) axis.
3. described hydraulic casing scraper according to claim 2, it is characterized in that: described axial dovetail groove (11) is 20 ° with the angle α of piston (7) axis.
4. described hydraulic casing scraper according to claim 3, it is characterized in that: the upper end of described latus rectum body (1) is cylinder, the bottom is up big and down small cone.
5. described hydraulic casing scraper according to claim 4, it is characterized in that: the axial dovetail groove (11) on the described piston (7), scraper base (2) upper end radially dovetail groove (10) quantity equate, be more than 2 or 2, be uniformly distributed along the circumference, and equate with axial elongated slot quantity on the body (3).
6. described hydraulic casing scraper according to claim 1 is characterized in that:
When the hydraulic casing scraper was in off working state, gapped between the hole end surface in described mozzle (4) lower surface and latus rectum body (1) upper end, the outer edge section of scraper (6) was positioned at the axial elongated slot of body (3);
When the hydraulic casing scraper is in running order, described piston (7) up under the effect of hydraulic pressure along body (3) down sliding, scraper (6) is radially outward mobile along the axial elongated slot of body (3), and scraper (6) outside blade contacts with internal surface of sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524030 CN202914039U (en) | 2012-10-15 | 2012-10-15 | Hydraulic type sleeve scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524030 CN202914039U (en) | 2012-10-15 | 2012-10-15 | Hydraulic type sleeve scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914039U true CN202914039U (en) | 2013-05-01 |
Family
ID=48162360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220524030 Withdrawn - After Issue CN202914039U (en) | 2012-10-15 | 2012-10-15 | Hydraulic type sleeve scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202914039U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726808A (en) * | 2012-10-15 | 2014-04-16 | 大港油田集团有限责任公司 | Hydraulic sleeve scraper |
| EP2960425A1 (en) * | 2014-06-24 | 2015-12-30 | Schoeller Bleckmann Oilfield Equipment AG | Drifting system |
| CN105971561A (en) * | 2016-06-23 | 2016-09-28 | 中石化石油工程技术服务有限公司 | Composite sleeve scraper for well drilling |
-
2012
- 2012-10-15 CN CN 201220524030 patent/CN202914039U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726808A (en) * | 2012-10-15 | 2014-04-16 | 大港油田集团有限责任公司 | Hydraulic sleeve scraper |
| CN103726808B (en) * | 2012-10-15 | 2016-09-28 | 大港油田集团有限责任公司 | Hydraulic sleeve scraper |
| EP2960425A1 (en) * | 2014-06-24 | 2015-12-30 | Schoeller Bleckmann Oilfield Equipment AG | Drifting system |
| CN105971561A (en) * | 2016-06-23 | 2016-09-28 | 中石化石油工程技术服务有限公司 | Composite sleeve scraper for well drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee after: Dagang Oil Field Group Co., Ltd. Patentee after: DRILLING TECHNOLOGY DEVELOPMENT COMPANY, TIANJIN DAGANG OILFIELD RESEARCH INSTITUTE OF PETROLEUM ENGINEERING Address before: Three Dagang oil field, Tianjin, Grand Port, No. 300280 Patentee before: Dagang Oil Field Group Co., Ltd. Patentee before: Tianjin Dagang Oilfield Drilling Technology Development Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130501 Effective date of abandoning: 20160928 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |