CN201218068Y

CN201218068Y - Milling type drifting device

Info

Publication number: CN201218068Y
Application number: CNU2008200255388U
Authority: CN
Inventors: 于建强; 张增顺; 黎石松; 王灵元; 张惠勇; 于建民; 杨成; 王伟; 张志海; 安毓卿
Original assignee: Downhole Operation Co of Shengli Petroleum Administration
Current assignee: Downhole Operation Co of Sinopec Shengli Oilfield Co
Priority date: 2008-07-08
Filing date: 2008-07-08
Publication date: 2009-04-08
Anticipated expiration: 2018-07-08

Abstract

The utility model discloses a milling-scraping well dredger in petroleum industry used for various underground engineering constructions of oil-water wells to dredge the well and salvage underground fallen objects. The milling-scraping well dredger comprises a well-dredging caliper, and a milling-scraping cutter is welded at the bottom end of the well-dredging caliper. Hard-wearing materials such as hard alloy, and the like are welded on the multi-edged milling-scraping cutter, the milling-scraping well dredger can effectively crumb rubber sheets inside a well and scrape dirt and geocerite on the inner wall of a bushing as well as other mineral crystals, blocking agent scales and burrs, and the scrapings are taken out of the well by the circulating workover fluid through rotation and roller compaction under the action of bit pressure. Simultaneously, the well-dredging caliper on the top of the multi-edged milling-scraping cutter achieves the goal of well dredging without lowering a separate salvage tool, thereby saving the construction cost of lifting and lowering a string of tube pillars, shortening the construction period and reducing the labor intensity of workers.

Description

Mill and scrape formula drifting device

Technical field

The utility model relates to the underground work instrument of petroleum industry, particularly mills and scrapes formula drifting device, is applicable to the underground work engineering of various oil-water wells, finishes the work of salvaging trouble of lost tool in hole in drifting.

Background technology

The oil field enters the later development stage, tubing string in the various oil-water well wells is because life cycle is long, hole condition is poor, the packer rubber of leaving in the well is too much, reasons such as the foul on the internal surface of sleeve pipe, hard wax and other crystallizable minerals, blocking agent fouling and burr in constructions such as sand washing, drifting operation, can't eliminate rubber, blocking agent fouling and burr etc. in the well, still be trapped in the well, cause perforation, survey in the construction such as zonal flow rate and be hampered, reduce the success rate of constructing, increased construction period at next step.Adopt at present usually special-purpose fishing tool, as tackle all problems at once, fishing socket carries out rubber and salvages, the fouling on the milling internal surface of sleeve pipe after the burr on the scraping borehole wall, is carried out the drifting job execution again.Because special-purpose fishing tool needs separately one-trip string down, not only increased working strength of workers, more prolonged the construction period.

Summary of the invention

The purpose of this utility model provides to mill scrapes formula drifting device, overcomes the defective of prior art, need not to descend separately fishing tool, uses with a kind of instrument and finish the work of salvaging trouble of lost tool in hole in drifting.

Use the present technique solution can cross above-mentioned purpose: to mill and scrape formula drifting device and comprise drift size gauge tool, scrape milling cutter in the welding of the bottom of drift size gauge tool.

The utility model compared with prior art has following useful effect: this device is scraped high-abrasive material such as pile-up welding hard alloy on the milling cutter at many ribs, under the pressure of the drill effect, by rotating, rolling, can effectively squeeze rubber in the broken well, foul on the milling internal surface of sleeve pipe, hard wax and other crystallizable minerals, blocking agent fouling and burr, chip is taken out of in the well by the circulation workover fluid.Simultaneously many ribs drift size gauge tool of scraping milling cutter top has reached the purpose of drifting again, need not descend separately fishing tool, the rountrip operating expenses of saving one-trip string.Shorten the duration, reduced working strength of workers.

Description of drawings

Accompanying drawing 1 is the front view of the utility model structural representation.

Accompanying drawing 2 is the vertical view of the utility model structural representation.

The specific embodiment

Below in conjunction with embodiment the utility model is done further detailed description: referring to accompanying drawing 1 and accompanying drawing 2, mill and scrape formula drifting device and comprise drift size gauge tool 2, the upper end of drift size gauge tool 2 is joints 1, scrapes milling cutter 3 in the welding of the bottom of drift size gauge tool 2.Scrape milling cutter 3 and be provided with one at least and scrape and mill sword, also can be provided with many and scrape and mill sword, accompanying drawing 1 and accompanying drawing 2 are illustrated to be 4 and to scrape and mill sword.The bottom blade tip of scraping milling cutter 3 is tapered, scrapes at it and mills on the sword built-up welding and scrape and mill particle, scrapes that to mill particle be high-abrasive materials such as carbide alloy.

During site operation, the utility model is connected the bottom of well workover tubing string, starts workover rig, the well workover tubing string drives the utility model and rotates, down to the shaft bottom.In the process of going into the well, scrape milling cutter 3 and while rotating the foreign material such as fouling on the internal surface of sleeve pipe are scraped and mill processing, cleaning internal surface of sleeve pipe while going into the well.Behind the shaft bottom, the workover rig on ground applies the pressure of the drill, under the pressure of the drill effect, the junk in shaft bottom is carried out milling handle, and by rotation, roll, squeezes foreign material such as rubber in the broken well, hard wax, blocking agent fouling.Centre bore and well workover tubing string through this instrument is carried into ground to the workover fluid of the chip utilization circulation after milling is handled from the shaft bottom, and workover fluid utilizes through post precipitation again.

Claims

1, mills and scrape formula drifting device, comprise drift size gauge tool (2), it is characterized in that scraping milling cutter (3) in the welding of the bottom of drift size gauge tool (2).

2, according to claim 1 milling scraped formula drifting device, it is characterized in that scraping milling cutter (3) and is provided with one at least and scrapes and mill sword.

3, according to claim 2 milling scraped formula drifting device, and the bottom blade tip that it is characterized in that scraping milling cutter (3) is tapered.