CN210396697U

CN210396697U - Cartoon scraping prevention device for underground pipe column

Info

Publication number: CN210396697U
Application number: CN201921151079.2U
Authority: CN
Inventors: 范玉斌; 杨育升; 黄明良; 毛谦明; 孙毅然; 桂成梁; 张磊
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp
Current assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-24
Anticipated expiration: 2029-07-22

Abstract

The utility model relates to a tubular column anti-cartoon scraping device in pit, this anti-cartoon scraping device includes upper scraper, lower scraper and scrapes the casing, upper scraper and lower scraper are crisscross to be set up and fix in scraping the casing through the scraper clamp plate, scrape the casing wall of casing and be equipped with casing pressure release hole, the outer wall is equipped with the well washing groove, the inner wall is equipped with two shearing rings, scrape the casing both ends and connect with upper joint and drifting joint respectively; the inner cavity of the central sliding sleeve is provided with two-stage ball seats, four rows of spring release holes and sliding sleeve release holes are formed in the tube body, and the central sliding sleeve is arranged in the scraping shell and located between the upper joint and the first shearing ring. The device can not only combine the pipe scraping construction and the drifting construction of underground operation into one, but also has the function of preventing drill sticking, effectively reduces the construction cost, obviously improves the construction efficiency, and has good use effect and application value.

Description

Cartoon scraping prevention device for underground pipe column

Technical Field

The utility model relates to a device is scraped to oil industry oil testing workover's scraping pipe drifting instrument, especially a cartoon is prevented to tubular column in pit.

Background

In the oil well repairing and testing operation, after a certain well section of the well is perforated or when a packer needs to be set for a certain well section, the well section needs to be scraped and subjected to well dredging treatment, so that the next construction can be carried out, and preparation is made for the next construction. At present, there is 201820666876.3 integrated device for scraping and dredging a downhole pipe column, although scraping and dredging operations can be effectively carried out, the requirements of basic well repairing and oil testing operations can be completed. However, since the device has no well-washing groove, the device has some disadvantages when applied to some wells with the well depth of 5000-7000 meters. When impurities such as high-hardness water scale and the like exist on the casing wall in the deep well and the ultra-deep well, after the casing wall is lowered to a certain depth, if the scale cannot be cleaned in a circulating well washing manner in time, the drill jamming can be caused; the other disadvantage is that when the pipe is scraped by throwing a ball and the drill is stuck, the scraper cannot be withdrawn, the drill stuck cannot be relieved, and only the pipe column can be forcibly lifted up and then the fishing tool can be lowered for fishing treatment.

Accordingly, improvements in well-dredging pipe-scraping tools for field use are still needed.

Disclosure of Invention

The utility model aims at providing a device is scraped to cartoon is prevented to tubular column in pit solves and has the easy card of brill of deep well, the easy scraper of tradition for the oil testing operation of super deep well workover that has impurity such as incrustation scale of high rigidity on the present wall of a well, and the problem of unable well-flushing improves the efficiency of construction, reduces construction cost.

In order to solve the above problem, the utility model discloses a realize like this:

the underground pipe column anti-cartoon scraping device comprises an upper scraper, a lower scraper and a scraping shell, wherein the upper scraper and the lower scraper are arranged in a staggered manner and fixed in the scraping shell through scraper press plates, shell pressure relief holes are formed in the shell wall of the scraping shell, a well washing groove is formed in the outer wall of the scraping shell, two shearing rings are arranged on the inner wall of the scraping shell, and two ends of the scraping shell are respectively connected with an upper joint and a drifting joint; the inner cavity of the central sliding sleeve is provided with two-stage ball seats, four rows of spring release holes and sliding sleeve release holes are formed in the tube body, and the central sliding sleeve is arranged in the scraping shell and located between the upper joint and the first shearing ring.

The number of the well washing grooves is equal to the number of the upper scrapers and the lower scrapers which are arranged in the circumferential direction of the scraping shell, the well washing grooves are in a zigzag shape and are provided with two vertical grooves and a chute, the two vertical grooves are longitudinally arranged on the outer wall of the scraping shell between the upper scrapers and between the lower scrapers and at two ends of the well washing grooves are communicated with the outer wall of the scraping shell at two sides, and the chute of the well washing grooves is communicated with the two vertical grooves on the outer wall of the scraping shell between the upper scrapers and the lower scrapers.

The two shearing rings are respectively a first shearing ring and a second shearing ring and are respectively fixed on the lower part of the inner wall of the scraping shell through a first shearing pin and a second shearing pin, and the inner diameters of the two shearing rings are consistent with the outer diameter of the lower end of the central sliding sleeve.

The utility model discloses a show the effect and be: the device can not only combine the pipe scraping construction and the drifting construction of underground operation into one, but also has the function of preventing drill jamming, and effectively reduces the construction cost. The utility model discloses in the deep well, the ultra-deep well workover or the oil testing operation of impurity such as incrustation scale that have the high rigidity, according to scraping pipe, drifting standard, connect the bottom borehole operation at the tubular column of going into the well to this device. Because in the structural arrangement, the upper half part of the device is a pipe scraping part, and the lower half part of the device is connected with a drift size joint, the tool is a drift size gauge tool in the process of descending a well without throwing balls, and without extending out of an upper scraper and a lower scraper. When the preset well section needing pipe scraping is reached, a first-stage pressing ball with a slightly smaller outer diameter is thrown into a well mouth, a first shearing pin is sheared, the central sliding sleeve moves downwards, and the upper scraper and the lower scraper extend out completely to serve as a pipe scraper. When the scraping construction is finished, a second secondary pressing ball with a slightly larger outer diameter is thrown in to press, the second shearing pin is broken, the central sliding sleeve continues to move downwards, the upper scraper and the lower scraper are completely withdrawn to form the drift size, and the drift size can be lifted out of a wellhead. If meet the card when boring in the case of scraping the pipe in-process in the pit, can throw the ball and suppress and withdraw the scraper totally, this device external diameter diminishes this moment, has created the condition for unfreezing, and the well-flushing groove on the scraping casing can be implemented and the well-flushing can be implemented in addition, can implement the operation of unfreezing immediately, need not to carry out the tubular column by force, salvage the operation again. Therefore, the utility model discloses saved fishing tool's work progress again, showing and improving the efficiency of construction, effectively reduced manufacturing cost, had apparent economic benefits and social and fine result of use and using value.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following detailed description of the present invention with reference to the drawings is not intended to limit the scope of the present invention, and all the modifications of the present invention belong to the protection category.

Referring to fig. 1, the downhole string anti-cartoon scraping device comprises an upper scraping blade 8, a lower scraping blade 13 and a scraping shell 18, wherein the upper scraping blade 8 and the lower scraping blade 13 are arranged in a staggered mode and are fixed in the scraping shell 18 through a scraping blade pressing plate 6. A casing pressure relief hole 5 is formed in the wall of the scraping casing 18, a well washing groove 12 is formed in the outer wall of the scraping casing, two shearing rings are arranged on the inner wall of the scraping casing 18, and two ends of the scraping casing 18 are respectively connected with the upper connector 1 and the drifting connector 19; the inner cavity of the central sliding sleeve 2 is provided with two-stage ball seats, four rows of spring release holes and sliding sleeve release holes 3 are arranged in the pipe body, and the central sliding sleeve 2 is arranged in the scraping shell 18 and is positioned between the upper joint 1 and the first shearing ring 14.

The number of the well washing grooves 12 is equal to the number of the upper scrapers 8 and the lower scrapers 13 which are arranged on the circumferential direction of the scraping shell 18, the well washing grooves are zigzag and are provided with two vertical grooves and one chute, the two vertical grooves are longitudinally arranged on the outer wall of the scraping shell 18 between the upper scrapers 8 and between the lower scrapers 13 and the upper scrapers 13, two ends of each vertical groove are communicated with the outer wall of the scraping shell 18, and one chute of the well washing grooves is communicated with the two vertical grooves on two sides of the outer wall of the scraping shell 18 between the upper scrapers 8 and the lower scrapers 13.

The two shearing rings are respectively a first shearing ring 14 and a second shearing ring 16, are respectively fixed on the lower part of the inner wall of the scraping shell 18 through a first shearing pin 15 and a second shearing pin 17, and the inner diameters of the two shearing rings are consistent with the outer diameter of the lower end of the central sliding sleeve 2, so that the central sliding sleeve 2 can be seated on the two shearing rings.

Below the knife bodies at two sides of the upper scraper 8 and the lower scraper 13, belleville springs 10 are arranged and fixed in the shell wall of the scraping shell 18 through a pressing plate 6, and V-shaped springs 9 are arranged at the bottoms of the knife bodies of the upper scraper 8 and the lower scraper 13, so that the upper scraper 8 and the lower scraper 13 are supported, and meanwhile, the spring bodies can conveniently slide into four rows of spring release holes in the central sliding sleeve 2.

The two-stage ball seat is arranged on the upper part of the inner cavity of the central sliding sleeve 2 and positioned on two sides of the sliding sleeve pressure relief hole 3, and the inner diameter of the one-stage ball seat below the sliding sleeve pressure relief hole 3 is smaller than that of the two-stage ball seat above the sliding sleeve pressure relief hole 3. The primary ball seat and the secondary ball seat are matched with the primary pressing ball and the secondary pressing ball respectively, and primary pressing is completed by the primary ball seat and the primary pressing ball; and the second-stage ball seat and the second-stage pressing ball complete the second pressing.

Four rows of spring release holes in the central sliding sleeve 2 are formed in the tube wall below the two-stage ball seat, the four rows of spring release holes are respectively composed of a first spring release hole 4, a second spring release hole 7, a third spring release hole 11 and a fourth spring release hole 20, the number and the distance of the spring release holes in each row are consistent with those of the upper scraper 8 and the lower scraper 13, and the upper scraper 8 and the lower scraper 13 respectively correspond to the two rows of spring release holes; each spring release hole is provided with an upper inclined hole wall and a lower straight hole wall, so that the V-shaped springs 9 of the upper scraper 8 and the lower scraper 13 can slide in along the force and cannot slide out.

The upper outer wall of the central sliding sleeve 2 and two sides of the sliding sleeve pressure relief hole 3 are provided with pressing steps, and the pressing steps can form a liquid flow cavity with the scraping shell 18 and can be matched with hanging steps on the inner wall of the scraping shell 18 and pressure relief grooves in the inner wall of the scraping shell 18 on two sides of the shell pressure relief hole 5. After the primary pressurizing ball is thrown into the liquid flow cavity for pressurizing, liquid flow entering from the sliding sleeve pressure relief hole 3 downwards pushes the central sliding sleeve 2 to move downwards and cut the first shearing ring 14, so that primary pressurizing is completed, the upper scraper 8 and the lower scraper 13 extend out of the scraping shell 18, and pipe scraping operation is performed; after throwing into second grade and suppressing the ball and suppressing, center sliding sleeve 2 can sit on scraping the suspension step of casing 18, and the pressure release groove of scraping casing 18 inner wall of suppression liquid accessible flows into the oil jacket annular space from casing pressure release hole 5, accomplishes the second and suppresses, lets go up scraper 8 and lower scraper 13 and all withdraws, plays the purpose that the pipe column was accomplished to the unfreezing or lift.

The use method of the device comprises the following steps: when repairing or testing oil in deep well or ultra-deep well with high hardness scale and other impurities, the device is connected to the bottom end of a well-descending pipe column and is firstly used as a well-dredging gauge for well descending and well dredging. When the well section needing to scrape the pipe is determined, a first one-stage pressing ball with a slightly smaller outer diameter is thrown at the well head, and the ball can be seated on a one-stage ball seat in the central sliding sleeve 2. After the pipe is pressed, the first shearing ring 14 shears the first shearing pin 15, the central sliding sleeve 2 descends to the first shearing ring 16, the upper scraper 8 and the lower scraper 13 are all extended out, and the outer diameter of the scraping shell 18 is increased, so that the pipe can be used as a pipe scraper. After the scraping construction is finished, a second-stage pressing ball is put into the center sliding sleeve, the outer diameter of the ball is slightly larger, and the ball can be located on a second-stage ball seat in an inner cavity at the upper end of the center sliding sleeve 2. After the well is pressurized, the second shearing pin 17 is sheared by the second shearing ring 16, the central sliding sleeve 2 continues to move downwards and is seated on a hanging step of the scraping shell 18, and the upper scraper 8 and the lower scraper 13 are all retracted to form a drift size gauge which can be lifted out of a well mouth.

If, in the process of throwing the first-level pressure ball downhole scraping pipe, when the drill is stuck, the second-level pressure ball with a slightly larger outer diameter can be continuously thrown to press, the upper scraper 8 and the lower scraper 13 are retracted, the outer diameter of the device is reduced, conditions are created for stuck freeing, and meanwhile, the well washing can be implemented through the well washing groove 12, so that the stuck drill is immediately removed. The utility model discloses save construction process, showing and improving the efficiency of construction, effectively reduced manufacturing cost.

The embodiments described above are merely exemplary embodiments, but the present invention is not limited to these embodiments, and those skilled in the art can make modifications without departing from the spirit and teaching of the present invention. Many variations, combinations, and modifications of the aspects disclosed herein are possible and are within the scope of the invention, which is, therefore, not to be limited by the above description.

Claims

1. A downhole tubular column anti-cartoon scraping device comprises an upper scraper, a lower scraper and a scraping shell, wherein the upper scraper and the lower scraper are arranged in a staggered manner and fixed in the scraping shell through scraper press plates; the inner cavity of the central sliding sleeve is provided with two-stage ball seats, four rows of spring release holes and sliding sleeve release holes are formed in the tube body, and the central sliding sleeve is arranged in the scraping shell and located between the upper joint and the first shearing ring.

2. The anti-cartoon scraping device of the underground pipe string as claimed in claim 1, wherein the number of the well-washing grooves is equal to the number of the upper scraper and the lower scraper arranged in the circumferential direction of the scraping shell, the well-washing grooves are zigzag and are provided with two vertical grooves and one inclined groove, the two vertical grooves are longitudinally arranged on the outer wall of the scraping shell between the upper scraper and between the lower scraper and the upper scraper, both ends of the two vertical grooves are communicated with the outer wall of the scraping shell, and the inclined groove of the well-washing groove is communicated with the two vertical grooves on both sides of the outer wall of the scraping shell between the upper scraper and the lower scraper.

3. The tubular column cartoon-preventing scraping device as claimed in claim 2, wherein the two shearing rings are a first shearing ring and a second shearing ring respectively, and are fixed on the lower part of the inner wall of the scraping shell through a first shearing pin and a second shearing pin respectively, and the inner diameters of the two shearing rings are matched with the outer diameter of the lower end of the central sliding sleeve.

4. The device as claimed in claim 1, 2 or 3, wherein the lower parts of the upper scraper and the lower scraper on both sides of the scraper body are provided with belleville springs and fixed in the wall of the scraping shell through a pressing plate, and the bottom parts of the scraper body of the upper scraper and the lower scraper are provided with V-shaped springs.

5. The device for preventing the cartoon scraping of the underground pipe string as claimed in claim 1 or 3, wherein the two-stage ball seat is arranged at the upper part of the inner cavity of the central sliding sleeve and at two sides of the pressure relief hole of the sliding sleeve, and the inner diameter of the one-stage ball seat below the pressure relief hole of the sliding sleeve is smaller than that of the two-stage ball seat above the pressure relief hole of the sliding sleeve.

6. The device of claim 4, wherein four rows of spring release holes in the center sliding sleeve are formed in the pipe wall below the two-stage ball seat, the four rows of spring release holes are respectively composed of a first spring release hole, a second spring release hole, a third spring release hole and a fourth spring release hole, the number and the distance of the spring release holes in each row are consistent with those of the upper scraper and the lower scraper, the upper scraper and the lower scraper correspond to the two rows of spring release holes respectively, and each spring release hole is provided with an upper inclined hole wall and a lower straight hole wall.

7. The tubular string cartoon-proof scraping device as recited in claim 6, characterized in that the upper outer wall of the center sliding sleeve and the two sides of the sliding sleeve pressure release hole are provided with pressing steps, the pressing steps can form a fluid chamber with the scraping shell and can be matched with the hanging steps of the inner wall of the scraping shell and the pressure release grooves in the inner wall of the scraping shell at the two sides of the shell pressure release hole.