CN218376416U

CN218376416U - Downhole through-scraping integrated tool

Info

Publication number: CN218376416U
Application number: CN202222748308.7U
Authority: CN
Inventors: 刘伟; 王博文; 相文明
Original assignee: Shandong Zhaoxin Oil Tools Co ltd
Current assignee: Shandong Zhaoxin Oil Tools Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-01-24
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses an underground through-scraping integrated tool, which relates to the technical field of well repairing through-scraping equipment and comprises an upper joint, a main body, a lower joint and a central tube, wherein the central tube is slidably inserted in the main body, and the lower end of the central tube is arranged on the inner wall of the lower joint through a shearing pin; the scraper is positioned in the groove, the upper stay bar and the lower stay bar are hinged with the scraper, the upper end of the upper stay bar is hinged with the top of the groove, and the lower end of the lower stay bar is hinged with the upper end of the push rod; the push rod is axially arranged at the lower part of the groove in a sliding manner, the outer wall of the central tube is provided with a plurality of supporting seats inserted into the lower part of the groove, the supporting seats are positioned at the lower side of the push rod, and a pressure spring is arranged between the supporting seats and the push rod; this device has optimized the extending structure of scraper, uses axial push rod and pressure spring to support the scraper, and this bearing structure stability is high, can effectively prolong device's life.

Description

Downhole through-scraping integrated tool

Technical Field

The utility model relates to a well workover leads to and scrapes equipment technical field, concretely relates to lead to in pit and scrape integrated instrument.

Background

At present, a well repairing operation construction site is provided with a well dredging and scraping integrated device, when a well is lowered, the well is dredged by the device, a set scraping well section is reached, a well head is pressed after a ball is thrown, a scraper is propped out, and the device also becomes a pipe scraper and can scrape the scraping well section. The drawbacks of this device are: only can scrape the set scraping section, and because the scraper is pressed and propped out after the tool is thrown, the well descending section at the upper part of the scraper cannot implement scraping construction, thereby burying potential safety hazards for the production of subsequent oil wells.

Chinese patent CN208168852U discloses a downhole tubular column through-scraping integrated device, which comprises a scraping shell, an upper scraper and a lower scraper, wherein two ends of a cutter body of the upper scraper and the lower scraper are respectively provided with a return spring and are fixed on the scraping shell by a pressure plate and a countersunk head screw, and the upper scraper and the lower scraper are arranged in the scraping shell in a staggered manner; the upper joint is in threaded connection with the scraping shell and the sedimentation cylinder in sequence, a piston central tube is arranged in the scraping shell, a piston spring is arranged between the upper end of the piston central tube and the upper joint, the lower end of the piston central tube is clamped on a piston limiting ring, a scraper retraction track in the piston central tube can enable the upper scraper and the lower scraper to be retracted into the scraping shell, and the outer diameters of the upper joint, the scraping shell and the sedimentation cylinder are equal; a precipitation filter cylinder and a strong magnetic ring are arranged in the precipitation cylinder; although the technical scheme can scrape the pipe from the well mouth, the service life of the supporting spring is short, the replacement and maintenance frequency is greatly increased, and the shaft scraping effect is reduced; specifically, the method comprises the following steps: the scraper spring is the V type spring, and through using the demonstration, the device is serious to V type spring compression, causes the spring life-span to shorten, causes to scrape pit shaft effect and reduces to change maintenance frequency and increase greatly, reduced the life of whole scraping device. In addition, the scraper retraction track on the piston central tube is designed to be a through groove, the scraper leaf spring is unreasonable in structure and is easily clamped into the groove, the inner diameter of the piston central tube is reduced, the well washing is unsmooth, and the central hole is easily blocked when impurities exist.

Therefore, it is urgently needed to develop a special tool for integrating the through-scraping and the scraping with good stability.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lead to in pit and scrape integrated instrument to the defect that prior art exists.

The technical scheme of the utility model is that: an underground through-scraping integrated tool comprises an upper joint, a main body, a lower joint and a central tube, wherein the upper joint, the main body and the lower joint are sequentially and fixedly connected, the central tube is inserted into the main body in a sliding mode, and the lower end of the central tube is installed on the inner wall of the lower joint through a shearing pin; the scraper is positioned in the groove, the upper support rod and the lower support rod are respectively positioned at the upper side and the lower side of the scraper and are hinged with the scraper, the upper end of the upper support rod is hinged at the top of the groove, and the lower end of the lower support rod is hinged with the upper end of the push rod; the push rod is axially arranged at the lower part of the groove in a sliding manner, a plurality of supporting seats inserted into the lower part of the groove are arranged on the outer wall of the central tube, the supporting seats are positioned at the lower side of the push rod, and a pressure spring is arranged between the supporting seats and the push rod;

when the shearing pin is not disconnected, the scraper is in an extending state; when the shearing pin is disconnected, the central tube and the supporting seat move downwards, and the scraper is in a withdrawing state.

Preferably, the scraper is divided into an upper scraper and a lower scraper, the upper scraper and the lower scraper are arranged in a circumferential array, and the upper scraper and the lower scraper are arranged in an staggered manner in the axial direction.

Preferably, the inner wall of the lower joint is provided with a step seat, and when the shearing pin is disconnected and the lower end of the central tube is in contact with the step seat, the bottom of the supporting seat is in contact with the bottom of the groove.

Preferably, the outer diameters of the upper joint, the main body and the lower joint are equal, and an inner chamfer is arranged at the upper end of the central pipe.

Preferably, the pipe wall of the upper part of the central pipe is provided with a liquid flow hole, the pipe wall of the upper part of the main body is provided with a well washing hole, and the inner wall of the main body is provided with an annular groove communicated with the well washing hole; when the shear pin is not disconnected, the flowbore communicates with the well-flushing bore through the annular slot.

Compared with the prior art, the utility model, have following advantage:

the device optimizes the telescopic structure of the scraper, and supports the scraper by using the axial push rod and the pressure spring, so that the support structure has high stability and can effectively prolong the service life of the device; when the device is used, the inner diameter of the central tube cannot be influenced, and the problem that the inner cavity of the central tube is blocked is avoided; the device is an integrated special tool capable of scraping pipes and dredging wells, reduces construction procedures and obviously improves construction efficiency.

Drawings

FIG. 1 is a schematic view of the utility model with the scraper extended out;

fig. 2 is a schematic view of the state of the scraper of the present invention when it is retracted.

In the figure: 1. upper joint, 2, main body, 201, groove, 202, well washing, 203, annular groove, 3, lower joint, 301, step seat, 4, central tube, 401, a supporting seat, 402, a liquid flow hole, 5, a shearing pin, 6, a scraper, 7, an upper support rod, 8, a lower support rod, 9, a push rod, 10 and a pressure spring.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example one

Referring to fig. 1-2, the downhole through-scraping integrated tool comprises an upper joint 1, a main body 2, a lower joint 3 and a central tube 4, wherein the upper joint 1, the main body 2 and the lower joint 3 are sequentially and fixedly connected, the central tube 4 is slidably inserted into the main body 2, and the lower end of the central tube is mounted on the inner wall of the lower joint 3 through a shearing pin 5; the scraper device is characterized by further comprising a scraper 6, an upper support rod 7, a lower support rod 8 and a push rod 9, wherein a plurality of axial grooves 201 are formed in the main body 2, the scraper 6 is located in the grooves 201, the upper support rod 7 and the lower support rod 8 are respectively located on the upper side and the lower side of the scraper 6 and are hinged with the scraper 6, the upper end of the upper support rod 7 is hinged to the top of the grooves 201, and the lower end of the lower support rod 8 is hinged with the upper end of the push rod 9; the push rod 9 is axially arranged at the lower part of the groove 201 in a sliding manner, a plurality of supporting seats 401 inserted into the lower part of the groove 201 are arranged on the outer wall of the central tube 4, the supporting seats 401 are positioned at the lower side of the push rod 9, and a pressure spring 10 is arranged between the supporting seats and the push rod 9;

when the shear pin 5 is not disconnected, the scraper 6 is in an extended state; when the shear pin 5 is broken, the central tube 4 and the support block 401 move downwards, with the scraper 6 in a retracted state.

The outer diameters of the upper joint 1, the main body 2 and the lower joint 3 are equal, and the upper end of the central pipe 4 is provided with an inner chamfer.

In more detail, the scraper 6 is divided into an upper scraper and a lower scraper, and the upper scraper and the lower scraper are arranged in a circumferential array and are staggered in the axial direction.

When the underground pipe column is subjected to the scraping operation, the device is connected to the lower end of the underground pipe column according to the construction requirement; the device body is made according to the required size of drift diameter gauge, and it can regard as drift diameter gauge to use, is equipped with on the body and scrapes the pipe part in addition, so just can carry out drift diameter and scrape the pipe construction simultaneously to whole tubular column from the well logging in, and can also carry out many times to the pit shaft according to the requirement and scrape to the requirement of pit shaft when satisfying packer down.

When the pipe scraping is finished to reduce the pull-out resistance or when the pipe scraping is blocked to reduce accidents, before the pipe scraping is finished, a ball is firstly thrown at the well mouth, and after the thrown ball reaches a ball seat at the upper end of the central pipe 4, the ball is pressed until the shearing pin 5 is sheared off. At the moment, the central tube 4 and the supporting seat 401 move downwards, the pressure spring 10 is released, the push rod 9 loses the support to drive the lower support rod 8 to move downwards, and the scraper 6 is retracted; at the moment, the outer diameter of the device is reduced, so that the drill bit is easy to pull out, and the pull-out resistance and accidents are relatively reduced.

The device optimizes the telescopic structure of the scraper 6, and supports the scraper 6 by using the axial push rod 9 and the pressure spring 10, so that the support structure has high stability and can effectively prolong the service life of the device; when in use, the device can not affect the inner diameter of the central tube 4, thereby avoiding the problem that the inner cavity of the central tube 4 is blocked; the device is an integrated special tool capable of scraping pipes and dredging a well, reduces construction procedures and obviously improves construction efficiency.

Example two

As a preferred embodiment of the present invention, the step seat 301 is added to the present embodiment in the lower joint 3 on the basis of the first embodiment, specifically:

in this embodiment, a step seat 301 is provided on the inner wall of the lower joint 3, and when the shear pin 5 is disconnected and the lower end of the center tube 4 is in contact with the step seat 301, the bottom of the support seat 401 is in contact with the bottom of the groove 201.

After the shear pin 5 breaks, the step seat 301 can counteract the force of the central tube 4 falling, eliminating the risk of the support seat 401 being cut by the bottom of the groove 201.

EXAMPLE III

As an optimized embodiment of the present invention, the well-flushing channel is added on the basis of the second embodiment, specifically:

in this embodiment, the upper portion of the central tube 4 is provided with a liquid flow hole 402 on the wall thereof, the upper portion of the main body 2 is provided with a washing hole 202 on the wall thereof, and the inner wall thereof is provided with an annular groove 203 communicated with the washing hole 202; when the shear pin 5 is not disconnected, the flowbore 402 communicates with the washwell bore 202 through the annular channel 203.

During scraping, the central tube 4 lumen communicates with the string lumen through the flowbore 402 and the well wash bore 202, allowing for a cyclic well wash.

The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.

Claims

1. An underground through-scraping integrated tool comprises an upper joint, a main body, a lower joint and a central tube, wherein the upper joint, the main body and the lower joint are sequentially and fixedly connected, the central tube is inserted into the main body in a sliding mode, and the lower end of the central tube is installed on the inner wall of the lower joint through a shearing pin; the method is characterized in that: the scraper is positioned in the groove, the upper support rod and the lower support rod are respectively positioned at the upper side and the lower side of the scraper and are hinged with the scraper, the upper end of the upper support rod is hinged at the top of the groove, and the lower end of the lower support rod is hinged with the upper end of the push rod; the push rod is axially arranged at the lower part of the groove in a sliding manner, a plurality of supporting seats inserted into the lower part of the groove are arranged on the outer wall of the central tube, the supporting seats are positioned at the lower side of the push rod, and a pressure spring is arranged between the supporting seats and the push rod;

when the shearing pin is not disconnected, the scraper is in an extending state; when the shearing pin is disconnected, the central tube and the supporting seat move downwards, and the scraper is in a retracting state.

2. The downhole integrated tool of claim 1, wherein: the scraper is divided into an upper scraper and a lower scraper, the upper scraper and the lower scraper are arranged in a circumferential array mode, and the upper scraper and the lower scraper are arranged in an staggered mode in the axial direction.

3. The downhole integrated tool of claim 1, wherein: the inner wall of the lower joint is provided with a step seat, and when the shearing pin is disconnected and the lower end of the central tube is in contact with the step seat, the bottom of the supporting seat is in contact with the bottom of the groove.

4. The downhole integrated tool of claim 1, wherein: the external diameter of top connection, main part and lower clutch equals, the upper end of center tube is equipped with interior chamfer.

5. The downhole integrated tool of claim 1, wherein: the pipe wall of the upper part of the central pipe is provided with a liquid flow hole, the pipe wall of the upper part of the main body is provided with a well washing hole, and the inner wall of the main body is provided with an annular groove communicated with the well washing hole; when the shear pin is not disconnected, the flowbore communicates with the well-flushing bore through the annular slot.