CN201428431Y

CN201428431Y - Tube inside wall scraping device

Info

Publication number: CN201428431Y
Application number: CN2009201527736U
Authority: CN
Inventors: 郭新超; 张新文; 蒋刚; 翟亚峰
Original assignee: Karamay Drilling Technology Institute of CNPC Western Drilling Engineering Co Ltd
Current assignee: Karamay Drilling Technology Institute of CNPC Western Drilling Engineering Co Ltd
Priority date: 2009-06-15
Filing date: 2009-06-15
Publication date: 2010-03-24
Anticipated expiration: 2019-06-15

Abstract

The utility model relates to a wall scraping device for insides of sleeves, which is used for oil-gas well cementation and completion. The middle of an outer surface of a wall scraping device body (1)is provided with a groove, a scraper group (2) is fixed on the wall scraping device body (1) via a press block group, the scraper group (2) is divided into an upper group and a lower group, each group is formed by at least three scrapers, the scrappers are uniformly distributed circumferentially, the scrappers of the upper group and the lower group are mutually staggered, the inner side of the scrapper group (2) which faces towards the wall scraping device body (1) is provided with at least one groove, a groove opposite to the groove of the scrapper group (2) is arranged at the correspondingposition of the wall scraping device body (1), and a spring (4) is arranged inside the groove. The press block group (3) is also divided into an upper group and a lower group, each group includes twopress blocks which are respectively located on the upper portion and the lower portion of the scraper group (2), one end of each press block is fixed via a pin and welded on the wall scraping device body (1), and other ends of the press blocks are movably connected with the scraper group (2). The wall scraping device is simple in structure and can clean attachments on inner walls of the sleeves, and a plurality of wall scraping devices can be serially connected and combined via drilling tools, thereby scraping inner walls of different sleeves at one step.

Description

Wall scraper in a kind of pipe

Technical field

The utility model relates to solid completion of oil gas field and workover treatment instrument, particularly is suitable for removing the interior wall scraper of a kind of pipe of attachment in the pipe, belongs to the downhole tool class.

Background technology

The oil gas well carries out often needing the upper strata internal surface of sleeve pipe is cleared up before the suspension sleeve operation; After ash was filled in Decanning is bored in well cementing operation, ash plug section was irregular usually, rough, and intact also operation of later stage is caused unfavorable factor, needed a kind of instrument to the effective scraping of internal surface of sleeve pipe carry out the scraping cleaning; When sticking stifled attachment needs workover treatment in the sleeve pipe, also need a kind of instrument that can clear up sticking stifled attachment in the sleeve pipe to handle in addition.

Summary of the invention

The purpose of this utility model provides in a kind of pipe with scraping the wall instrument, can realize the attachment of internal surface of sleeve pipe is cleared up, and guarantees that internal surface of sleeve pipe is unobstructed.

For achieving the above object, the technical solution adopted in the utility model is: be groove in the middle of the wall scraper body appearance, press block set is fixed on the scraper group on the wall scraper body; The scraper group is two groups up and down, is made up of at least three scrapers for every group, and scraper is circumferentially uniform, organizes between the scraper up and down and staggers mutually, and the scraper external surface is spiral-shaped, and its end face is smooth; The scraper group has at least one groove towards wall scraper body inboard, and wall scraper body corresponding positions is equipped with groove on the other side, the built-in spring of groove; Press block set also is two groups up and down, and every group of briquetting is two, lays respectively at the top and the bottom of scraper group, and each briquetting one end has dowel fixes and is welded on the wall scraper body, and the other end and scraper group flexibly connect.

Scraper group blade is three, and angle differs 120 ° between each scraper.

There is connecting thread at wall scraper body interior two ends, conveniently are connected with tubing string.

Flexible connection between press block set and the scraper group has the dovetail shaped projection for the scraper two ends, and the briquetting front end has the projection at inside button inclination angle suitable with it.

The beneficial effects of the utility model are: (1) the utility model adopts double totally six blade constructions, and every effective scraping area of scraper by the sixth of the section of scraping, therefore, can not stay the dead angle effectively to the internal surface of sleeve pipe scraping greater than internal surface of sleeve pipe; Pass through smoothly when (2) particular design of scraping cusp tip has guaranteed this wall scraper through two pin thread gaps in casing coupling, can not cause to hang tag; (3) there is customizable junction button at the wall scraper two ends, can be connected flexibly with other equipment during use, also can be with a plurality of wall scrapers and drilling tool polyphone, and the different tube walls of a scraping adapt to and scrape the wall operation under the multiple situation.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.

The utility model is described in more detail below in conjunction with accompanying drawing.

The utility model mainly is made up of wall scraper body 1, scraper group 2, press block set 3 and spring 4, is groove in the middle of wall scraper body 1 appearance, and press block set is fixed on scraper group 2 on the wall scraper body 1; Scraper group 2 is two groups up and down, is made up of at least three scrapers for every group, and scraper is circumferentially uniform, organizes between the scraper up and down and staggers mutually, and the scraper external surface is spiral-shaped, and its end face is smooth; Scraper group 2 has at least one groove towards wall scraper body 1 inboard, and wall scraper body 1 corresponding positions is equipped with groove on the other side, the built-in spring 4 of groove; Press block set 3 also is two groups up and down, and every group of briquetting is two, lays respectively at the top and the bottom of scraper group 2, and each briquetting one end has dowel fixes and is welded on the wall scraper body 1, and the other end and scraper group 2 flexibly connect.

Can be according to actual needs, to wall scraper further optimization and/or improvements in above-mentioned a kind of pipe:

Scraper group 2 blades are three in the present embodiment, and angle differs 120 ° between each scraper.

There is connecting thread at wall scraper body 1 inner two ends, conveniently are connected with tubing string, also can realize many group scrapers polyphones, according to the field conduct situation, determine the connecting thread type and the size of wall scraper body 1.

Spring 4 is the minute-pressure state that contracts when mounted.

Flexible connection between press block set 3 and the scraper group 2 has the dovetail shaped projection for the scraper two ends, and the briquetting front end has the projection at inside button inclination angle suitable with it.

Operating principle of the present utility model: the screw thread according to customization links to each other the utility model with drilling tool, prepare drilling tool length, be lowered to instrument, the scraper group is compressed spring after entering sleeve pipe, scraper group entire outer diameter is dwindled, to the utility model arrive need doctor locations after, lift drilling tool up and down for several times, scrape the wall operation.

Claims

1, wall scraper in a kind of pipe, mainly form by wall scraper body (1), scraper group (2), press block set (3) and spring (4), it is characterized by: be groove in the middle of wall scraper body (1) appearance, press block set is fixed on scraper group (2) on the wall scraper body (1); Scraper group (2) is two groups up and down, is made up of at least three scrapers for every group, and scraper is circumferentially uniform, organizes between the scraper up and down and staggers mutually, and the scraper external surface is spiral-shaped, and its end face is smooth; Scraper group (2) has at least one groove towards wall scraper body (1) inboard, and wall scraper body (1) corresponding positions is equipped with groove on the other side, the built-in spring of groove (4); Press block set (3) also is two groups up and down, and every group of briquetting is two, lays respectively at the top and the bottom of scraper group (2), and each briquetting one end has dowel fixes and is welded on the wall scraper body (1), and the other end and scraper group (2) flexibly connect.

2, wall scraper in a kind of pipe according to claim 1, it is characterized in that: scraper group (2) blade is three, and angle differs 120 ° between each scraper.

3, wall scraper in a kind of pipe according to claim 1, it is characterized in that: there is connecting thread at the inner two ends of wall scraper body (1), conveniently are connected with tubing string.

4, wall scraper in a kind of pipe according to claim 1, it is characterized in that: the flexible connection between press block set (3) and the scraper group (2) has the dovetail shaped projection for the scraper two ends, and the briquetting front end has the projection at inside button inclination angle suitable with it.