CN2454528Y - Oil-tube oil wiper - Google Patents

Abstract

The utility model discloses an oil tube oil wiper which can clean the outer wall of an oil tube when the lower oil tube is dismantled from an oil well and can replace a self-sealing well packer in the construction operations of sand washing and well flushing of the lower oil tube. The oil wiper is composed of an upper cover, a base and an oil wiping rubber ring. The utility model has the advantages of small volume and light weight, and the oil wiping rubber ring can swing with a tube column in a construction. With the function of automatic aligning, the utility model can seal a well mouth all the time, and the oil tube column does not rub the oil wiping rubber ring obliquely and hard, so that the service life of the oil wiping rubber is extended, and meantime, the time for adjusting a well frame to ensure that the oil tube column is aligned with the well mouth is saved.

Description

The oil pipe oil wiper

The utility model relates to a kind of oil pipe oil wiper, and it can clean oil-pipe external wall when oil well removes the oil pipe operation, and can substitute self-sealing blowout preventer sealing well head in the construction operation of oil pipe sand washing down, well-flushing.

Oil well is in the measure operation that plays oil pipe, and tube wall is attached with dirts such as crude oil, paraffin, both contaminated environment, easy cleaning not again.Domestic each oil field does not all have the oils instrument of scraping that is specifically designed to the cleaning oil-pipe external wall in the construction operation that plays oil pipe at present, but finish this work with self-sealing blowout preventer, and self-sealing blowout preventer has following defective: the one, because the rubber core of self-sealing blowout preventer is fixed, can not swing with the oil pipe that promotes, and some oil-well derrick and well head misalign, tubing string often is partial to certain on one side, therefore caused the eccentric wear phenomenon of tubing string to the rubber core, this not only makes shorten the application life of rubber core, and the frizing effect is undesirable; The 2nd, in the construction of sand washing, well-flushing, tubing string must remain on the middle position of rubber core at any time, otherwise well head can not seal, can't operation, operating worker needs about 2 hours consuming time at every turn for this reason, adjusts derrick and makes the middle position of tubing string at well head, and is not only consuming time but also require great effort; The 3rd, the self-sealing blowout preventer that uses is not only huge but also heavy at present, needs 2 to 3 people it could be moved when operating at every turn.

The utility model is exactly at the defective more than the self-sealing blowout preventer, a kind of oil pipe oil wiper that can swing automatic aligning with tubing string is provided, not only long service life, volume are little, in light weight for it, can be used to clean oil-pipe external wall, also can be used for sand washing, in the construction operation of well-flushing, replace self-sealing blowout preventer.

The utility model is achieved in that and at first designs and produces spill loam cake and last spill ring type base under the ring type, scrapes the factice ring, the following cavity of spill loam cake is installed and is scraped the factice ring under the ring type, last spill ring type base upwards is fit into the following cavity of loam cake, it is fixing wherein to scrape the factice ring, and loam cake is installed as one by bolt and base and constitutes.At loam cake and base its inner cavity that forms of back is installed, is equipped with in the cavity and scrapes the factice ring, scrape the factice ring and make, and portion's sulfuration within it has metallic framework by elastomeric material.Metallic framework is one certain thickness circular metal ring, is equipped with many holes on the ring; Skeleton also can connect to form by metal ring and several matrix tablets and its welding or with bolt, has many holes on metal ring and matrix tablet.At the upper end-face edge of scraping the factice ring, design has a shirt rim, and the shirt rim can be designed to triangle, also can be designed to semi-circular or other shape.Scrape factice ring external diameter and be designed to, make to scrape to form an annular space between factice ring and the cavity less than the cavity internal diameter.

With the well head bolt this utility model and well head four-way flange are fixed together before the well construction operation.When removing tubing string, scrape oil and dirt that the factice ring can scrape oil-pipe external wall.Specific volume is little, in light weight mutually with self-sealing blowout preventer for this oil wiper, only need 1 people to get final product easy manipulation, and can be with tubing string swing arbitrarily in annular space in construction because scrape the factice ring, reached the purpose of automatic aligning, scrape the factice ring and also can play the effect that seals well head all the time, main is that tubing string can not cause eccentric wear and hard grind to wipe phenomenon to scraping the factice ring, therefore prolonged the application life of scraping the factice ring greatly, also saved operating worker simultaneously and adjusted derrick and make tubing string and well head time and manpower that the heart consumed.

Further describe concrete structure of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is a structure cross-sectional schematic of the present utility model.

With reference to Fig. 1, the following cavity of spill loam cake 1 is installed and is scraped factice ring 2 under the ring type that design is processed as one, the last spill ring type base 3 that design is processed as one upwards is fit into the following cavity of loam cake 1, will scrape factice ring 2 and fix wherein, and loam cake 1 is assembled into one by bolt and base 3 and constitutes., at loam cake 1 and base 3 its inner cavity that forms of back is installed, be equipped with in the cavity and scrape factice ring 2, scrape factice ring 2 and make, and portion's sulfuration within it there is metallic framework 4 by elastomeric material.Metallic framework 4 is one certain thickness metal ring, is equipped with many holes on the ring; Metallic framework 4 also can connect to form by metal ring and several matrix tablets and its welding or with bolt, has many holes on metal ring and matrix tablet.At the upper end-face edge of scraping factice ring 2, design has a shirt rim 5, and shirt rim 5 can be designed to triangle, also can be designed to semi-circular.Scrape factice ring 2 external diameters less than the cavity internal diameter, make to scrape to form an annular space between factice ring 2 and the cavity.

The utility model in use, the flange hole that passes on loam cake 1, the base 3 with bolt is connected with well head four-way flange, at this moment can play lower tubular column by operational procedure, scraping factice ring 2 can scrape wax, the wet goods dirt of tubing string outer wall, since scrape factice ring 2 and cavity between design enough annular spaces arranged, scraping factice ring 2 can be with tubing string swing arbitrarily in annular space, automatic aligning in construction.

Claims (2)

1, a kind of oil pipe oil wiper, it is characterized in that the factice ring is scraped in the following cavity design and installation of spill loam cake under the ring type, last spill ring type base upwards is fit into the following cavity of loam cake, to scrape that the factice ring is fixing wherein to be constituted, at loam cake and base its inner cavity that forms of back is installed, that installs in the cavity scrapes factice ring external diameter less than the cavity internal diameter, is scraping formation one annular space between factice ring and the cavity.

2, oil pipe oil wiper as claimed in claim 1 is characterized in that scraping the factice ring and is and adopts elastomeric material to make, and metallic framework is arranged scraping factice ring indoor design sulfuration; In the upper end-face edge design of scraping the factice ring one shirt rim is arranged, the shirt rim can be designed to triangle, also can be designed to semi-circular shape.