CN219492268U

CN219492268U - Oilfield workover tool

Info

Publication number: CN219492268U
Application number: CN202320368875.1U
Authority: CN
Inventors: 刘海燕; 袁宗传; 许新波; 游艳平
Original assignee: Shandong Weima Equipment Technology Co ltd; Shandong Hongfeng Intelligent Equipment Co ltd
Current assignee: Shandong Weima Equipment Technology Co ltd; Shandong Hongfeng Intelligent Equipment Co ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-08-08
Anticipated expiration: 2033-03-02

Abstract

The utility model relates to the technical field of oilfield workover tools, and particularly discloses an oilfield workover tool, which comprises: the upper joint is arranged at the upper end of the sand sample channel and is in sealing connection with the central tube and the outer tube; the middle lower end of the central tube is provided with a deformable leather cup, the base of the leather cup is fixed on the central tube, the opening of the leather cup faces upwards, and the upper edge of the leather cup is connected with the inner side surface of the outer tube; the lower end of the outer tube is provided with a movable scraping block, the lower end of the central tube is provided with a spring, and the spring is connected with the scraping block. The utility model achieves the purposes of dredging a well and obtaining sand samples and scale samples, realizes the functions of scraping the sleeve with variable diameter within the elastic limit range, removing wax, scaling and sleeve perforation burrs attached in the sleeve, reduces working procedures in the well repairing process, and improves the working efficiency of well repairing.

Description

Oilfield workover tool

Technical Field

The utility model relates to the technical field of well repair tools, in particular to an oilfield well repair tool.

Background

In the well repairing process of the oil and gas field, the well dredging of the well dredging gauge is carried out according to the construction design, the sleeve is scraped by the scraper, the pressure resistance of the construction oil pipe and the production pipe is ensured by pressure test of the oil pipe of the production pipe, the squeezing and the production pipe of the later construction are ensured, sand samples are obtained by sand dragging during sand prevention of the sand outlet well, and the median analysis of the particle size is carried out to determine the parameter specification of the sand prevention screen pipe. Often, 2-3 times of pipe column lifting and replacing 2-3 underground tools are needed, so that the problems of high labor intensity, long working period, high pollution to a construction reservoir, high construction cost and the like of well repairing personnel are caused.

Therefore, it is necessary to develop a well repairing tool, which effectively reduces the labor intensity and the working efficiency of workers, shortens the construction period, reduces the occupation of well repairing, reduces the operation cost and improves the economic benefit.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, provides an oilfield workover tool, and solves the problems of multiple procedures, low working efficiency and long construction period in the workover process.

The technical scheme of the utility model is as follows:

an oilfield workover tool comprising:

the upper joint is arranged at the upper end of the sand sample channel and is in sealing connection with the central tube and the outer tube;

the middle lower end of the central tube is provided with a deformable leather cup, the base of the leather cup is fixed on the central tube, the opening of the leather cup faces upwards, and the upper edge of the leather cup is connected with the inner side surface of the outer tube;

the lower end of the outer tube is provided with a movable scraping block, the lower end of the central tube is provided with a spring, and the spring is connected with the scraping block.

Through the technical scheme, the sand sample channel and the leather cup are arranged between the central tube and the outer tube, when the sampling is carried out, during the back flushing circulation, the bottom of the tool is flushed by the well flushing liquid, scraping scraps and bottom sand setting are carried up, the leather cup receives the impact force of the well flushing liquid and deforms upwards, the scraping scraps and sand setting are carried up by the well flushing liquid, pass through the leather cup and are gathered in the leather cup, the tool is retracted to the ground, and the scraping scraps and sand samples in the leather cup can be sampled.

The scraping block can transversely move along the opening on the outer tube, the scraping block can scrape the sleeve in a variable diameter mode through the elasticity of the spring, burrs of wax, scale and sleeve perforation can be removed inside the sleeve more flexibly, and the scraping block is not influenced by the size of a dirty block in the sleeve.

The outer tube is usually set to satisfy steel external diameter, standard circularity and the prescribed length that the open well required, can solve open well detection sleeve pipe necking down, squeeze flat and crooked scheduling unusual problem.

When pressure test is performed, a steel ball with a proper size is put into the upper joint, and the central tube is sealed for pressure test operation.

As a preferable technical scheme, a sliding hole is formed in the outer tube, a baffle with the width larger than the aperture of the sliding hole is arranged at one end of the scraping block, the baffle is connected with the spring and arranged on the inner side of the outer tube, and the other end of the scraping block penetrates through the sliding hole and extends to the outer side of the outer tube.

Through above-mentioned technical scheme, scrape the piece and pass through the flexible of spring, can realize lateral shifting, be applicable to the lantern ring of different pipe diameters and scrape the pipe function, the baffle has effectively prevented to scrape the piece roll-off to the outer tube outside, can't reset.

Further, a plurality of slide holes are formed in the periphery of the outer tube, the slide holes are arranged in an up-and-down staggered mode, and when the pipeline is scraped, the pipeline is scraped by the scraping blocks which are arranged in the up-and-down staggered mode, so that the pipeline scraping effect is better, and the scraping efficiency is improved.

As a preferable technical scheme, the outer side face of the scraping block is provided with threads, so that the scraping efficiency of the scraping block is improved.

As a preferable technical scheme, the ball seat is arranged at the opening of the upper end of the upper joint and can be connected with the steel ball in a sealing way, so that good sealing performance between the steel ball and the central tube and accuracy of pressure test detection data are guaranteed. When the pressure test operation is carried out on the oil well pipeline, a steel ball is put into the oil well pipeline, a tool sleeve is sealed, injection pressure is carried out in the oil well pipeline, pressure holding detection is carried out, and whether the pressure in the oil well pipeline is reduced or not is observed after the pressure holding time is up.

As a preferable technical scheme, the plug is arranged at the opening of the lower end of the central tube and matched with the sand sample channel, so that the purpose of reverse circulation well flushing is realized.

The beneficial effects of the utility model are as follows:

according to the oilfield workover tool, the purposes of dredging a well and acquiring sand samples and scale samples are achieved by arranging the outer tube, the central tube, the leather cup and the sand sample channel; the scraping block and the spring are arranged, so that the function of scraping the sleeve in a flexible limiting range and removing wax, scale and sleeve perforation burrs attached to the inside of the sleeve is realized, the working procedures in the well repairing process are reduced, and the working efficiency of well repairing is improved.

Drawings

Fig. 1 is a schematic structural diagram of an oilfield workover tool of the present utility model.

In the figure: 1. an upper joint; 2. an outer tube; 3. a central tube; 4. a leather cup; 5. a scraping block; 51. a baffle; 6. a spring; 7. plugging; 8. a sand sample channel; 9. a ball seat; 10. and a slide hole.

Detailed Description

In order to make the technical means, technical features, objects and technical effects of the present utility model easy to understand, the present utility model will be further described with reference to the specific drawings.

As shown in fig. 1, a schematic structural diagram of an oilfield workover tool of the present utility model is provided, including an upper joint 1, an outer pipe 2 and a central pipe 3, where the tool is connected to the lower end of a construction oil pipe through the upper joint 1, the central pipe 3 is installed in the outer pipe 2, the central pipe 3 and the outer pipe 2 are concentric, a sand channel 8 is reserved between the outer pipe 2 and the central pipe 3, the upper joint 1 is installed at the upper ends of the outer pipe 2 and the central pipe 3, and the upper joint 1 is connected with both the outer pipe 2 and the central pipe 3 in a sealing manner. A screwed plug 7 is fixedly arranged at the lower end of the central tube 3 and is used for sealing the lower end of the central tube 3.

The lower end of the outer tube 2 is provided with a plurality of slide holes 10, the slide holes 10 are arranged at intervals along the outer tube 2 and are staggered up and down, and the slide holes 10 are arranged into polygonal holes. The lower extreme fixed mounting of center tube 3 has a plurality of springs 6, and the mounted position of spring 6 corresponds with the position of slide opening 10, and the end fixedly connected with scraping piece 5 of spring 6, the one end of scraping piece 5 is equipped with baffle 51, and baffle 51 is connected with spring 6, and the other end of scraping piece 5 has slide opening 10 department to stretch out and draw back to the outside of outer tube 2, and scraping piece 5 can slide along slide opening 10 through the flexible of spring 6 to realize the scraping power of variable diameter scraping sleeve pipe and adjustment scraping piece 5. After scraping, the outer pipe 2 is used for well dredging operation, so that smooth well descending operation of tools with larger diameters such as a packer is ensured.

The central tube 3 is fixedly provided with a changeable leather cup 4, the leather cup 4 is fixed at the middle lower end of the central tube 3 and at the upper end of a spring 6, an opening of the leather cup 4 faces upwards, and the upper edge of the leather cup 4 is connected with the inner side of the outer tube 2. When the reverse circulation well washing is performed, the sand sample and the scale sample flow upwards along with the cleaning liquid, the cleaning liquid jacks up the leather cup 4 upwards, the side edge of the leather cup 4 is stressed to deform, the cleaning liquid flows upwards through a gap between the leather cup 4 and the outer tube 2, part of the sand sample and the scale sample are gathered into the leather cup 4, and after a tool is taken out, the sand sample and the scale sample can be collected for further sand prevention and sleeve scaling evaluation.

The ball seat 9 is arranged at the rear position of the upper end of the upper joint 1, the ball seat 9 is in a trapezoid shape with a large upper end opening, the ball seat 9 can be in sealing connection with the steel ball, when pressure test detection is carried out, the steel ball is thrown into a pipeline, and falls into the ball seat 9 to seal the central tube 3.

Working principle:

pigging function: the outer tube 2 is set to be the rigid body outer diameter, standard roundness and specified length required by the open well, can meet the conditions that the open well detects the abnormality such as shrinkage, flattening, bending and the like of the sleeve, provides the oil field service operation whether the quality of the underground sleeve is normal or not, and the abnormal state can show signs of blocking.

Scraping pipe function: the polygonal sliding 10 is arranged at the lower end of the outer tube 2, the scraping block 5 is installed outwards from the inner side of the outer tube 2, the scraping block 5 is limited by the baffle plate 51, the spring 6 provides elastic supporting scraping force for the scraping block 5, the variable diameter scraping sleeve in the elastic limiting range is realized, and the waxy, scaling and sleeve perforation burrs attached to the inside of the sleeve are clear.

Pressure testing function: chamfering and turning are carried out to the upper end of top connection 1, forms trapezoidal ball seat, and when carrying out pressure testing detection tubular column screw thread connection to upper portion construction oil pipe whether seepage, throw the steel ball and sit in the top connection and hold down the pressure, whether pressure drops through certain time, can detect whether seepage between the adapter sleeve.

Reverse circulation sampling function: the sand sample channel and the filtering and collecting cavity formed by the outer tube 2, the central tube 3, the leather cup 4 and the plug 7 can realize reverse circulation well flushing and obtain sand samples and scale samples, and provide enough and credible underground samples for sand control screen specification design, acid cleaning and scale removal acid liquor formula and the like.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Equivalent changes and modifications of the utility model are intended to fall within the scope of the present utility model.

Claims

1. An oilfield workover tool, comprising:

the sand sample device comprises an upper joint (1), an outer tube (2) and a central tube (3), wherein the central tube (3) is arranged in the outer tube (2), a sand sample channel (8) is arranged between the central tube (3) and the outer tube (2), and the upper joint (1) is arranged at the upper end of the sand sample channel (8) and is in sealing connection with the central tube (3) and the outer tube (2);

the middle lower end of the central tube (3) is provided with a deformable leather cup (4), the base of the leather cup (4) is fixed on the central tube (3), the opening of the leather cup (4) faces upwards, and the upper edge of the leather cup (4) is connected with the inner side surface of the outer tube (2);

the lower extreme of outer tube (2) is equipped with movable scraping piece (5), the lower extreme of center tube (3) is equipped with spring (6), and spring (6) are connected with scraping piece (5).

2. An oilfield workover tool according to claim 1, wherein the outer tube (2) is provided with a sliding hole (10), one end of the scraping block (5) is provided with a baffle plate (51) with a width larger than the aperture of the sliding hole (10), the baffle plate (51) is connected with the spring (6) and is arranged on the inner side of the outer tube (2), and the other end of the scraping block (5) passes through the sliding hole (10) and extends to the outer side of the outer tube (2).

3. An oilfield workover tool according to claim 2, wherein the outer tube (2) is provided with a plurality of sliding holes (10) along the periphery, and the sliding holes (10) are staggered up and down.

4. An oilfield workover tool according to claim 1 or 2, wherein the scraping block (5) is provided with a thread on its outer side.

5. An oilfield workover tool according to claim 1, wherein the upper end opening of the upper joint (1) is provided with a ball seat (9).

6. An oilfield workover tool according to claim 1, wherein a plug (7) is provided at the lower end opening of the base pipe (3).