CN215256108U - High-efficient anti-intraductal bailing instrument that circulates - Google Patents

Abstract

The utility model discloses a bailing instrument in high-efficient reverse circulation is applicable to multistage cased well, contains the sand washing operation of major diameter conglomerate well. Including urceolus, top connection, intermediate tube, baffle, lower clutch, the top connection uses threaded connection in urceolus upper portion, the baffle welds in the urceolus middle part, and the cutting has the overflowing hole on the baffle, the lower clutch uses threaded connection in urceolus lower part, intermediate tube connects and puts in the urceolus in the lower clutch upper portion. The utility model discloses instrument simple structure, convenient to use, solution multistage cased well that can be fine, contain major diameter conglomerate well can't wash out major diameter conglomerate and the problem that the major diameter conglomerate blockked up the export in the sand washing operation. The sand washing operation can be completed more efficiently and safely.

Description

High-efficient anti-intraductal bailing instrument that circulates

Technical Field

The utility model relates to an operation instrument field in the pit especially relates to a sand bailing instrument in high-efficient reverse circulation.

Background

With the development of reservoir exploration, a large number of deep wells and ultra-deep wells appear, and more wells adopt a composite casing well body structure in consideration of cost saving and the like.

In the oil exploration and development, sand washing construction is inevitable in the drilling and trial maintenance construction. For wells rich in large-diameter conglomerates at the bottom of the well, particularly multi-stage cased wells, positive sand washing generally cannot wash out large-diameter gravels, and accidents such as drilling blockage and the like are easy to happen. A well washing effect is better achieved by a well backwashing mode commonly used in construction, but the large-diameter conglomerate is prone to blocking an upper outlet (the diameter of the outlet is far smaller than the drift diameter in the pipe) of a pipeline, so that sand washing failure and pipe column blocking are caused. At present, an internal fishing tool aiming at the large-diameter conglomerate is not used in a common operation tubular column.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high-efficient reverse circulation bailing instrument, it not only can be not influencing returning out of minor diameter granule, can fish out the major diameter conglomerate that the shaft bottom should not wash out simultaneously and reach the sand washing effect, moreover simple structure, convenient operation and can avoid the tubular column interior stifled.

For realizing the utility model discloses a utility model aims at, the utility model discloses the technical scheme content that adopts specifically as follows:

an efficient reverse circulation in-loop bailing tool comprising: the outer barrel, the upper joint, the middle pipe, the baffle and the lower joint; the upper joint is arranged at one end of the outer barrel, the baffle is the same as the inner diameter of the outer barrel in shape and is fixedly arranged inside the outer barrel, a plurality of overflowing holes are formed in the surface of the baffle, the lower joint is arranged at the other end of the outer barrel, and the middle pipe penetrates through the center of the lower joint to stretch into the outer barrel.

The baffle is arranged at the position where the outer barrel is connected with the upper joint and is fixed in the outer barrel in a welding mode.

Wherein, top connection one end sets up an oil pipe box, and the other end sets up to the pin thread that matches with the urceolus mouth of a river type.

Wherein the baffle surface is provided with a plurality of circular or elliptical through-flowing holes.

One end of the lower joint is provided with a male buckle matched with the outer barrel, the end part of the part extending into the outer barrel is provided with a female buckle matched with the middle pipe, and the other end of the lower joint is provided with an oil pipe male buckle.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a bailing instrument in reverse circulation includes urceolus, top connection, intermediate tube, baffle, lower clutch, the top connection uses threaded connection in urceolus upper portion, the baffle welds in the urceolus middle part, the cutting has the discharge orifice on the baffle, the lower clutch uses threaded connection in the urceolus lower part, the intermediate tube is connected and is put in the urceolus in the lower clutch upper portion. Through the utility model discloses, not only can not influence returning out of minor diameter granule, can fish out the major diameter conglomerate that the shaft bottom should not wash out simultaneously and reach the sand washing effect, simple structure, convenient operation just can avoid the tubular column internal blockage moreover.

Drawings

The patent will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is the utility model provides a shale gas fracturing resistance to wears low pressure water supply line rubber pad's schematic structure view.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, the utility model provides a reverse circulation inner bailing tool. Including top connection 1, cross discharge orifice 2, baffle 3, urceolus 4, intermediate pipe 5, lower clutch 6, top connection 1 uses threaded connection in urceolus 4 upper portion, baffle 3 welds upper portion in urceolus 4, the last cutting of baffle 3 has cross discharge orifice 2, lower clutch 6 uses threaded connection in urceolus 4 lower part, intermediate pipe 5 is connected in that urceolus 4 is arranged in on 6 upper portions of lower clutch.

The baffle 3 is arranged at the position where the outer cylinder 4 is connected with the upper joint 1 and is fixed in the outer cylinder 4 in a welding mode.

Wherein, an oil pipe box is arranged at one end of the upper joint 1, and a male buckle matched with the mouth shape of the outer cylinder is arranged at the other end of the upper joint.

Wherein, the surface of the baffle 3 is provided with a plurality of circular or oval through-flowing holes 2.

Wherein, one end of the lower joint 6 is provided with a male buckle matched with the outer cylinder, the end part of the part extending into the outer cylinder 4 is provided with a female buckle matched with the middle pipe 5, and the other end is provided with an oil pipe male buckle.

During the specific use, the instrument is assembled on ground, insert in the well washing tubular column, at the reverse circulation well washing in-process, in the gravel carries the bailing instrument in the reverse circulation through taking the sand liquid, the discharge orifice 1 that the minor diameter gravel passes through on the 4 interior baffles of urceolus 3 goes up to ground, major diameter gravel is kept off by baffle 3 then falls into interior bailing instrument in, the operation is ended the back and is played out along with the instrument together, takes the major diameter gravel to ground, accomplishes the sand washing operation of major diameter gravel.

The utility model discloses a thread button is connected in the lower part in the sand washing oil pipe string, and in the sand washing operation of reverse circulation, the gravel carries to the interior bailing instrument of reverse circulation through taking sand liquid in, and the discharge orifice that the minor diameter gravel passes through on the urceolus interior baffle returns to ground, and major diameter conglomerate is blocked by the baffle then fall into interior bailing instrument in, and the work is finished the back and is played out along with the instrument together, takes the major diameter gravel to ground, accomplishes the sand washing operation of major diameter conglomerate. The tool is simple in structure and convenient to use, and can well solve the problems that the multi-stage cased well and the well containing the large-diameter conglomerate cannot wash out the large-diameter conglomerate in the sand washing operation and the large-diameter conglomerate blocks an outlet. The sand washing operation can be completed more efficiently and safely.

The utility model discloses an use the multistage cased well of solution that can be fine, contain major diameter conglomerate well can't wash out the major diameter conglomerate and the problem that the major diameter conglomerate blockked up the export in the sand washing operation, can prevent the emergence of oil pipe shutoff condition in the reverse circulation sand washing, can be more high-efficient safe completion sand washing operation.

Be different from prior art, the utility model provides a reverse circulation in-loop bailing instrument, including urceolus, top connection, intermediate pipe, baffle, lower clutch, threaded connection is used on urceolus upper portion to the top connection, the baffle welds in the urceolus middle part, the cutting has the overflow hole on the baffle, threaded connection is used in the urceolus lower part to the lower clutch, intermediate pipe connects and puts in the urceolus in the lower clutch upper portion. Through the utility model discloses, not only can not influence returning out of minor diameter granule, can fish out the major diameter conglomerate that the shaft bottom should not wash out simultaneously and reach the sand washing effect, simple structure, convenient operation just can avoid the tubular column internal blockage moreover.

While the embodiments of this invention have been described in connection with the accompanying drawings, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various forms of the embodiments without departing from the scope of the invention.

Claims (5)

1. An efficient reverse circulation in-situ bailing tool, comprising: the outer barrel, the upper joint, the middle pipe, the baffle and the lower joint; the upper joint is arranged at one end of the outer barrel, the baffle is the same as the inner diameter of the outer barrel in shape and is fixedly arranged inside the outer barrel, a plurality of overflowing holes are formed in the surface of the baffle, the lower joint is arranged at the other end of the outer barrel, and the middle pipe penetrates through the center of the lower joint to stretch into the outer barrel.

2. The tool as claimed in claim 1, wherein the baffle is fixed in the outer cylinder by welding at the position where the outer cylinder is connected to the upper joint.

3. The tool of claim 1, wherein the top sub is provided with a female oil pipe fastener at one end and a male fastener at the other end for mating with the mouth of the outer barrel.

4. The tool of claim 1 wherein the baffle surface is provided with a plurality of circular or elliptical through-flow holes.

5. The efficient reverse circulation in-loop bailing tool of claim 1, wherein: one end of the lower connector is provided with a male buckle matched with the outer barrel, the end part of the part extending into the outer barrel is provided with a female buckle matched with the middle pipe, and the other end of the lower connector is an oil pipe male buckle.

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