Rotary paraffin scraper for downhole operation

Abstract

The utility model discloses a downhole operation rotary paraffin scraper which comprises a paraffin scraping cylinder, a hollow cavity is formed in the paraffin scraping cylinder, a first air bag is arranged in the hollow cavity, a paraffin scraping plate is arranged on the outer side of the first air bag, a contraction groove is formed in the outer side of the paraffin scraping cylinder, the paraffin scraping plate is connected with the contraction groove in a sleeved mode, and a connecting shaft penetrates through the interior of the paraffin scraping cylinder. A first gear is arranged at the top end of the connecting shaft, a control seat is arranged at the top end of the paraffin scraping cylinder, the first gear extends into the control seat, a second gear is arranged in the control seat, a motor is arranged at the top end of the second gear, a second air bag is arranged on the outer side of the control seat, a traction rope is arranged at the top end of the control seat, and an inflation pipe is arranged on one side of the traction rope. A base is arranged at the bottom end of the paraffin scraping cylinder, and a third air bag is arranged on one side of the base. The wax scraping plate is driven by the first air bag to extrude the inner wall of the well casing, the device is suitable for well casing operation of different specifications, wax block impurities are extruded by the third air bag to rise, and the wax block impurities are conveniently and automatically cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of paraffin scrapers, and more specifically, to a downhole operation rotary paraffin scraper. Background Technique

[0002] With the extension of the oilfield exploitation time, wax jamming often occurs in oil wells with serious wax deposition, which not only affects the production of oil wells, but also the casing must be waxed during downhole operations. The paraffin scraper with the application number 201721060887.9 discloses a paraffin scraper body, the paraffin scraper body has a paraffin scraping head, the paraffin scraping head has a plurality of pointed heads, and the pointed heads face downwards. In this way, during the downward movement of the oil well paraffin scraper, the pointed heads of the paraffin scraping head first contact the paraffin below. Since the contact area between the pointed heads of the paraffin scraping head and the paraffin is small, the downward pressure can be more concentrated on a smaller area, and the paraffin in the smaller area can be removed, so that the oil well paraffin scraper can continue to move downward and remove wax.

[0003] When the existing downhole operation rotary paraffin scraper is in use, due to the different specifications of well pipes, the paraffin scraper often does not fit. An oversized paraffin scraper will damage the well pipe, and an undersized paraffin scraper often fails to clean thoroughly. Moreover, the scraped wax easily enters the oil pipe and causes the oil pipe to be blocked, and it is impossible to directly work on the wax block device. For this reason, this application proposes a downhole operation rotary paraffin scraper to solve this problem.

[0004] In view of the problems in the related art, no effective solution has been proposed yet. Content of the Utility Model

[0005] The purpose of the utility model is to provide a downhole operation rotary paraffin scraper to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides a downhole operation rotary paraffin scraper, including a paraffin scraping cylinder, a hollow cavity is arranged inside the paraffin scraping cylinder, a first airbag is arranged inside the hollow cavity, a paraffin scraping plate is arranged outside the first airbag, a contraction groove is arranged outside the paraffin scraping cylinder, the paraffin scraping plate is sleeved with the contraction groove, a connecting shaft penetrates through the paraffin scraping cylinder, a first gear is arranged at the top end of the connecting shaft, a control seat is arranged at the top end of the paraffin scraping cylinder, the first gear extends into the control seat, a second gear is arranged inside the control seat, a motor is arranged at the top end of the second gear, a second airbag is arranged outside the control seat, a towing rope is arranged at the top end of the control seat, an air charging pipe is arranged on one side of the towing rope, a base is arranged at the bottom end of the paraffin scraping cylinder, and a third airbag is arranged on one side of the base.

[0007] Preferably, the paraffin scraping plate is fixedly connected to the first airbag by bolts, the connecting shaft is welded to the paraffin scraping cylinder, and the control seat is connected to the connecting shaft by bearings.

[0008] Preferably, the first gear is fixedly connected to the connecting shaft by bolts, the second gear is meshed with the first gear, the motor is rotationally connected to the second gear, the motor is fixedly connected to the wax scraping cylinder by bolts, and the connecting shaft is rotationally connected to the base by a bearing.

[0009] Preferably, the second airbag is fixedly connected to the control seat by bolts, and the third airbag is fixedly connected to the base by bolts.

[0010] Preferably, the inflation pipes are respectively connected to the valve cores of the first airbag, the second airbag and the third airbag.

[0011] Preferably, one end of the towing rope is connected to the towing mechanism, and the other end of the towing rope is fixedly connected to the control seat by bolts.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] The present utility model is a downhole operation rotary wax scraper, which is provided with a wax scraping cylinder, a control seat and a base. The inflation of the first airbag in the wax scraping cylinder drives the wax scraping plate to extend out of the contraction groove, so that the wax scraping plate presses against the well wall. The motor in the control seat drives the second gear, the first gear and the connecting shaft to rotate, which can drive the wax scraping cylinder to rotate, facilitating the cleaning work of well walls of different specifications. The second airbag on the control seat and the third airbag on the base respectively fix the control seat and the base. After the wax block falls, the third airbag squeezes the wax block impurities upward. It not only has the effect of being applicable to downhole operations of different specifications, but also has the characteristic of automatically cleaning the wax block impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a schematic structural diagram of a downhole operation rotary wax scraper according to an embodiment of the present utility model;

[0016] Figure 2 is an internal structural schematic diagram of a downhole operation rotary wax scraper according to an embodiment of the present utility model

[0017] Figure 3 is a schematic structural diagram of the wax scraping cylinder in a downhole operation rotary wax scraper according to an embodiment of the present utility model.

[0018] Reference numerals:

[0019] 1. Wax scraping cylinder; 101. Hollow cavity; 102. Connecting shaft; 103. First airbag; 104. Shrinkage groove; 105. Wax scraping plate; 106. First gear; 2. Control seat; 201. Second gear; 202. Motor; 203. Second airbag; 204. Inflatable tube; 205. Towing rope; 3. Base; 301. Third airbag. Detailed implementation manners

[0020] Next, with reference to the accompanying drawings and specific implementation manners, a further description is made for the utility model:

[0021] Please refer to Figures 1-3 , a downhole operation rotary wax scraper according to an embodiment of the present utility model includes a wax scraping cylinder 1. A hollow cavity 101 is provided inside the wax scraping cylinder 1. A first airbag 103 is provided inside the hollow cavity 101. A wax scraping plate 105 is provided outside the first airbag 103. A shrinkage groove 104 is provided outside the wax scraping cylinder 1. The wax scraping plate 105 is sleeved with the shrinkage groove 104. A connecting shaft 102 penetrates through the inside of the wax scraping cylinder 1. A first gear 106 is provided at the top end of the connecting shaft 102. A control seat 2 is provided at the top end of the wax scraping cylinder 1. The first gear 106 extends into the control seat 2. A second gear 201 is provided inside the control seat 2. A motor 202 is provided at the top end of the second gear 201. A second airbag 203 is provided outside the control seat 2. A towing rope 205 is provided at the top end of the control seat 2. An inflatable tube 204 is provided on one side of the towing rope 205. A base 3 is provided at the bottom end of the wax scraping cylinder 1. A third airbag 301 is provided on one side of the base 3. The present utility model drives the wax scraping plate 105 to press against the inner wall of the well pipe through the first airbag 103, which is convenient for operating on well pipes of different specifications. The wax block impurities are pushed up by the third airbag 301, which is convenient for automatically cleaning the wax block impurities.

[0022] According to the above solution of the present utility model, the wax scraping plate 105 is fixedly connected to the first airbag 103 by bolts. The connecting shaft 102 is welded to the wax scraping cylinder 1. The control seat 2 is connected to the connecting shaft 102 by a bearing, and can drive the wax scraping plate 105 to extend out of the shrinkage groove 104.

[0023] According to the above solution of the present utility model, the first gear 106 is fixedly connected to the connecting shaft 102 by bolts. The second gear 201 is meshed with the first gear 106. The motor 202 is connected to the rotating shaft of the second gear 201. The motor 202 is fixedly connected to the wax scraping cylinder 1 by bolts. The connecting shaft 102 is connected to the base 3 by a bearing. The motor 202 is composed of a reduction motor, and can drive the connecting shaft 102 and the wax scraping plate 105 to rotate for wax scraping treatment on the inner wall of the well pipe.

[0024] According to the above solution of the present utility model, the second airbag 203 is fixedly connected to the control seat 2 by bolts, which is convenient for pressing and supporting the control seat 2. The third airbag 301 is fixedly connected to the base 3 by bolts, which is convenient for pressing and supporting the base 3.

[0025] According to the above solution of the present utility model, the inflation pipe 204 is respectively connected to the valve cores of the first airbag 103, the second airbag 203 and the third airbag 301, facilitating the inflation work.

[0026] According to the above solution of the present utility model, one end of the towing rope 205 is connected to the towing mechanism, and the other end of the towing rope 205 is fixedly connected to the control seat 2 by bolts, facilitating the towing of the entire wax scraper.

[0027] During specific use, first insert the entire wax scraper into the well, and then inflate the first airbag 103, the second airbag 203 and the third airbag 301 respectively through the inflation pipe 204. First, make the second airbag 203 and the third airbag 301 bulge to squeeze the inner wall of the well, respectively squeeze and fix the controller and the base 3, and make the first airbag 103 bulge in the hollow cavity 101, driving the wax scraping plate 105 to extend into the contraction groove 104, so that the wax scraping plate 105 squeezes the inner wall of the well. Then, control the motor 202 to work through an external control system. The motor 202 drives the second gear 201 to rotate, the second gear 201 drives the first gear 106 to rotate, the first gear 106 drives the connecting shaft 102 to rotate, and the connecting shaft 102 drives the wax scraping cylinder 1 and the wax scraping plate 105 to rotate, scraping off the wax clumps attached to the inner wall of the well. While scraping the wax, the external towing mechanism pulls the towing rope 205, driving the entire wax scraper to rise along the inner wall of the well, thereby performing wax scraping treatment on the well. The scraped wax blocks are squeezed and lifted by the third airbag 301, facilitating the cleaning of wax block debris. It not only has the effect of automatically rotating and scraping wax, but also has the characteristics of inflatable adaptation to different specifications of downhole operations.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "rear", "middle part", "inner part", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rotary wax scraper for underground operations, comprising a wax scraper cylinder (1), characterized in that: The wax scraping cylinder (1) has a hollow cavity (101) inside, a first airbag (103) inside, a wax scraping plate (105) outside the first airbag (103), a contraction groove (104) outside the wax scraping cylinder (1), the wax scraping plate (105) is sleeved with the contraction groove (104), a connecting shaft (102) passes through the wax scraping cylinder (1), a first gear (106) is provided at the top of the connecting shaft (102), and a control seat (106) is provided at the top of the wax scraping cylinder (1). 2), the first gear (106) extends into the control seat (2), a second gear (201) is provided inside the control seat (2), a motor (202) is provided at the top of the second gear (201), a second airbag (203) is provided on the outside of the control seat (2), a traction rope (205) is provided at the top of the control seat (2), an inflation tube (204) is provided on one side of the traction rope (205), a base (3) is provided at the bottom end of the wax scraping cylinder (1), and a third airbag (301) is provided on one side of the base (3).

2. A rotary wax scraper for underground operations according to claim 1, characterized in that: The wax scraping plate (105) is bolted and fixedly connected to the first airbag (103), the connecting shaft (102) is welded to the wax scraping cylinder (1), and the control seat (2) is bearing-connected to the connecting shaft (102).

3. A rotary wax scraper for underground operations according to claim 2, characterized in that: The first gear (106) is bolted and fixedly connected to the connecting shaft (102), the second gear (201) is meshed and connected to the first gear (106), the motor (202) is connected to the rotating shaft of the second gear (201), the motor (202) is bolted and fixedly connected to the wax scraping cylinder (1), and the connecting shaft (102) is connected to the bearing of the base (3).

4. A rotary wax scraper for underground operations according to claim 3, characterized in that: The second airbag (203) is fixedly connected to the control seat (2) by bolts, and the third airbag (301) is fixedly connected to the base (3) by bolts.

5. A rotary wax scraper for underground operations according to claim 4, characterized in that: The inflation tube (204) is respectively connected to the valve cores of the first airbag (103), the second airbag (203) and the third airbag (301).

6. A rotary wax scraper for underground operations according to claim 5, characterized in that: One end of the traction rope (205) is connected to the traction mechanism, and the other end of the traction rope (205) is fixedly connected to the control seat (2) by bolts.

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