CN210289715U

CN210289715U - Wax removal tool

Info

Publication number: CN210289715U
Application number: CN201920786904.XU
Authority: CN
Inventors: 林莹; 纪杨; 李思瑶; 吕冬梅; 谷岳; 程为红; 魏元军; 谭疆晖; 曾维伟; 刘伟; 董文军; 杨卫东; 李春龙; 胡博; 谷尚震; 童根; 滕沛延
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-04-10
Anticipated expiration: 2029-05-29

Abstract

The utility model provides a paraffin removal instrument relates to the oil gas exploitation field. The utility model provides a paraffin removal instrument includes paraffin removal spare, collection wax spare and guide, and paraffin removal spare is the round platform form, and the guide is including collecting the chamber with the minor diameter end fixed connection of paraffin removal spare, collection wax spare, and the opening in collection chamber makes progress, and the guide extends to the opening top of collecting the chamber. The utility model discloses a paraffin removal instrument is equipped with the collection wax spare that is used for collecting the wax. The paraffin scraped by the paraffin removal part can enter the paraffin collection part after being separated from the inner wall of the oil well, so that the probability that the scraped paraffin falls back to the oil well is reduced, the probability that the scraped paraffin is condensed on the inner wall of the oil well again along with the output of crude oil is effectively reduced, the occurrence of oil well blockage can be effectively delayed, and the yield of the oil well is improved.

Description

Wax removal tool

Technical Field

The utility model relates to an oil gas exploitation field especially relates to a paraffin removal instrument.

Background

The main components of crude oil are hydrocarbons, but the crude oil also contains dissolved paraffins. The closer to the ground during the extraction of crude oil, the lower the temperature of the crude oil, and when the temperature of the crude oil is lower than the wax precipitation point of the crude oil, paraffin is precipitated from the crude oil. The precipitated paraffin can be condensed on the inner wall of the oil well, and if the paraffin condensed on the inner wall of the oil well is not cleaned in time, the yield of the oil well is reduced, even the oil well is blocked, and the production of the oil well is stopped.

The paraffin that the clearance was condensed at the oil well inner wall need use paraffin removal instrument, and current paraffin removal instrument is including scraping the wax board, and the one end bending type of scraping the wax board becomes the elbow, and the elbow can scrape the paraffin that condenses at the oil well inner wall. The other end of the wax scraping plate is connected with a steel wire rope, and the steel wire rope can guide the wax scraping plate to move up and down in the oil well.

However, the paraffin removal tool in the prior art does not have the function of collecting the paraffin, so the paraffin scraped by the paraffin removal tool can directly fall back to the bottom of the oil well after being separated from the inner wall of the oil well. The paraffins that fall back into the well may re-dissolve in the crude oil, increasing the wax content of the crude oil. The fallen back paraffin may be output with the crude oil and condensed on the inner wall of the oil well again, and the yield of the oil well is influenced.

SUMMERY OF THE UTILITY MODEL

To overcome the above-mentioned defects of the prior art, the present invention provides a paraffin removal tool to overcome some deficiencies of the prior art.

The utility model provides a paraffin removal tool, including paraffin removal spare, collection wax spare and guide, paraffin removal spare is the round platform form, the guide with the minor diameter end fixed connection of paraffin removal spare, collection wax spare is including collecting the chamber, the opening of collecting the chamber makes progress, just the guide extends to collect the opening top in chamber.

The paraffin removal tool as described above, optionally, the paraffin removal member comprises a plurality of paraffin removal bodies extending along a generatrix of the circular truncated cone; a plurality of the paraffin removal rings are uniformly distributed around a central shaft; the top end of the paraffin cleaning body is fixedly connected with the guide piece.

The paraffin removal tool as described above, optionally, two sides of the paraffin removal body are turned inwards to form a groove-shaped structure, and the groove wall of the paraffin removal body is located on one side of the paraffin removal body facing the central shaft.

The paraffin removal tool as described above, optionally, a paraffin scraping slope is formed at the bottom of the paraffin removal body; the thickness of the wax scraping inclined plane is gradually reduced in a direction away from the guide piece; the outer wall of the wax scraping inclined plane, which is far away from the central shaft, is smoothly connected with the outer wall of the paraffin removal body, which is far away from the central shaft.

The paraffin removal tool as described above, optionally, the guide inner wall is curved in a cross-section through the central axis; the curve comprises a first arc and a second arc; the first arc and the second arc are smoothly connected; the first arc comprises a first end and a second end, the second arc comprises a third end and a fourth end, the inner wall of the guide piece is concave upwards, the second end and the third end are coincided at the vertex of the inner wall of the guide piece, and the connecting line of the first end and the fourth end is perpendicular to the central axis; the opening of the guide is downward.

The paraffin removal tool as described above, optionally, the collection chamber is V-shaped in cross-section through the central axis; the inner wall of the collection chamber tapers away from the central axis in a direction away from the guide.

The wax removal tool as described above, optionally, the wax collection member comprises a connecting rod smoothly connecting the guide member and the collection chamber.

The paraffin removal tool as described above, optionally, one end of the connecting rod is detachably connected to the guide member, and the other end of the connecting rod is detachably connected to the collection chamber.

Optionally, the paraffin removal tool further comprises a main rod, and a connector is connected to one side of the guide piece away from the collection cavity; the connector is used for connecting the main rod and the guide piece.

Optionally, the connecting head is detachably connected to one end of the main rod; the other end of the main rod is connected with a steel wire rope.

The utility model discloses a paraffin removal instrument is equipped with the collection wax spare that is used for collecting the wax. The paraffin scraped by the paraffin removal part can enter the paraffin collection part after being separated from the inner wall of the oil well, so that the probability that the scraped paraffin falls back to the oil well is reduced, the probability that the scraped paraffin is condensed on the inner wall of the oil well again along with the output of crude oil is effectively reduced, the occurrence of oil well blockage can be effectively delayed, and the yield of the oil well is improved.

Drawings

Fig. 1 is a schematic cross-sectional view of a paraffin removal tool according to an embodiment of the present invention;

fig. 2 is a schematic front view of a paraffin removal tool according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a paraffin removal tool according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of area A of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the bottom end of the paraffin removal body of the present invention;

FIG. 6 is a schematic cross-sectional view of a paraffin removal tool according to another embodiment of the present invention;

fig. 7 is a schematic view of an overall structure of a paraffin removal tool according to an embodiment of the present invention.

Reference numerals

100: cleaning wax;

110: cleaning wax;

111: a trench wall;

112: scraping a wax inclined plane;

200: a wax collecting member;

210: a collection chamber;

220: a connecting rod;

300: a guide;

310: a first arc;

311: a first end;

312: a second end;

320: a second arc;

321: a third end;

322: a fourth end;

400: a central shaft;

500: a main rod;

600: a wire rope;

700: a connecting head.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be noted that, in the description of the present invention, the terms "first" and "second" are only used for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The following detailed description of the present invention will be provided in conjunction with the accompanying drawings to enable those skilled in the art to more fully understand the present invention.

As shown in fig. 1 and 2, the present embodiment provides a paraffin removal tool, which includes a paraffin removal unit 100, a paraffin collection unit 200, and a guide unit 300, wherein the paraffin removal unit 100 is in a circular truncated cone shape, the guide unit 300 is fixedly connected to a small-diameter end of the paraffin removal unit 100, the paraffin collection unit 200 includes a collection chamber 210, an opening of the collection chamber 210 faces upward, and the guide unit 300 extends to above the opening of the collection chamber 210.

The paraffin removal element 100 removes the paraffin from the wall of the well, the guide element 300 removes the paraffin from the paraffin removal element 100 into the paraffin collection element 200, the paraffin collection element 200 collects the paraffin falling from the guide element 300, and the paraffin collection element 200 carries the paraffin until a worker cleans the paraffin collection element 200 off-hole.

The paraffin removal part 100 is in a circular truncated cone shape, and the diameter of the bottom surface of the paraffin removal part 100 is larger than that of the top surface of the paraffin removal part 100. Therefore, in the paraffin removal process, only the bottom of the paraffin removal part 100 is abutted against the paraffin adhered to the inner wall of the oil well, so that the overlarge contact surface between the paraffin removal part 100 and the paraffin on the inner wall of the oil pipe can be effectively avoided, the friction between the paraffin removal tool and the paraffin layer on the inner wall of the oil pipe is effectively reduced, and the paraffin removal tool is effectively prevented from being clamped in the oil pipe to block the oil pipe. Blocking the oil pipe means that the paraffin removal tool cannot move under the action of the paraffin layer, namely the paraffin removal tool cannot leave the blocking position.

Under the influence of gravity, the paraffin removal part 100 has a downward movement tendency, and during the downward movement of the paraffin removal part 100, paraffin which is in contact with the bottom of the paraffin removal part 100 is carried away from the inner wall of the oil well by the paraffin removal part 100. The paraffin partially separated from the inner wall of the well adheres to the paraffin removal member 100.

During the paraffin removal process, the paraffin adhered to the paraffin removal unit 100 is gradually increased, the gradually increased paraffin starts to be gradually accumulated along the paraffin removal unit 100, and the paraffin which is accumulated along the paraffin removal unit 100 in the past continuously moves upwards along the paraffin removal unit 100 until entering the guide 300 under the pushing of the paraffin which newly enters the paraffin removal unit 100.

Since the guide 300 is fixedly connected with the small-diameter end of the paraffin removal unit 100, the paraffin enters the guide 300 from the paraffin removal unit 100 without any blocking structure, which is beneficial for the paraffin to smoothly enter the guide 300 from the paraffin removal unit 100.

Since the opening of the collection chamber 210 is upward and the guide 300 extends above the opening of the collection chamber 210, the paraffin entering the guide 300 may enter the collection chamber 210 along the inner wall of the guide 300 and may also fall into the cavity of the collection chamber 210 under the influence of gravity. The collection chamber 210 opens upwardly and the guide 300 extends above the opening of the collection chamber 210 so that a majority of the paraffin entering the guide 300 can enter the collection chamber 210 of the paraffin removal tool.

According to the technical scheme, the paraffin removal tool comprises the paraffin removal part 100, the paraffin collection part 200 and the guide part 300, the paraffin removal part 100 is in a circular truncated cone shape, the guide part 300 is fixedly connected with the small-diameter end of the paraffin removal part 100, the paraffin collection part 200 comprises the collection cavity 210, the opening of the collection cavity 210 faces upwards, and the guide part 300 extends to the upper part of the opening of the collection cavity 210, so that paraffin can smoothly enter the guide part 300 from the paraffin removal part 100 and enter the collection cavity 210 of the paraffin removal tool from the guide part 300; and the circular truncated cone-shaped paraffin removal part 100 effectively prevents the paraffin removal tool from being blocked in the oil pipe to block the oil pipe.

As shown in fig. 1 and 2, optionally, the paraffin removal member 100 of the present embodiment includes a plurality of paraffin removal bodies 110, and the paraffin removal bodies 110 extend along a generatrix of the circular truncated cone; the plurality of wax cleaning bodies 110 are uniformly distributed around the central shaft 400; the top end of the wax removing body 110 is fixedly connected with the guide 300.

As shown in fig. 1 to 3, there is a gap between adjacent paraffin removal bodies 110, and the gap allows the bottom of the paraffin removal body 110 to expand and contract radially, so that the distance from the bottom end of the paraffin removal body 110 to the central shaft 400 can be changed. When the wax layer on the inner wall of the oil pipe is thick, the bottom end of the wax removing body 110 can smoothly enter the oil pipe for wax removal through shrinkage, and the wax removing tool is favorable for cleaning the oil pipe with serious wax deposition.

The paraffin removal bodies 110 uniformly distributed around the central shaft 400 can simultaneously remove the paraffin deposited at each position on the circumferential direction of the inner wall of the oil pipe in the process of moving the paraffin removal tool downwards. Because the plurality of paraffin removal bodies 110 are uniformly distributed on the circumferential direction of the oil pipe, when paraffin is removed, the paraffin removal tool does not need to be moved down, and the paraffin removal tool does not need to be rotated at a large angle, so that the efficiency of removing a paraffin layer is improved.

The top end of the paraffin removal body 110 is fixedly connected with the guide piece 300, so that the paraffin removal body 110 can be effectively prevented from falling, the safety performance of a paraffin removal tool is improved, and small objects are prevented from falling into a well.

In the technical scheme, the paraffin removal part 100 comprises a plurality of paraffin removal bodies 110, and the paraffin removal bodies 110 extend along the generatrix of the circular truncated cone; the plurality of wax cleaning bodies 110 are uniformly distributed around the central shaft 400; the technical means that the top end of the paraffin removal body 110 is fixedly connected with the guide piece 300 is beneficial to the paraffin removal tool to clean the oil pipe with serious paraffin deposition, the paraffin layer cleaning efficiency is improved, the safety performance of the paraffin removal tool is improved, and small objects are prevented from falling into the well.

As shown in fig. 3 and 4, alternatively, two sides of the paraffin cleaning body 110 of the present embodiment are turned inward to form a groove-shaped structure, and the groove wall 111 of the paraffin cleaning body 110 is located on one side of the paraffin cleaning body 110 facing the central axis 400.

The groove wall 111 of the paraffin cleaning body 110 can increase the contact area between the paraffin adhered to the paraffin cleaning body 110 and the paraffin cleaning body 110, so that the friction between the paraffin and the paraffin cleaning body 110 is increased, more paraffin is adhered to the paraffin cleaning body 110, the gradual accumulation of the paraffin adhered to the paraffin cleaning body 110 is facilitated, and the amount of the paraffin falling back to the oil well from the paraffin cleaning body 110 is reduced.

The groove wall 111 of the paraffin cleaning body 110 is located on one side of the paraffin cleaning body 110 facing the central shaft 400, which is beneficial for paraffin to smoothly enter the guide 300. Only paraffin entering the inner wall of the guide member 300 is likely to fall into the collection chamber 210, and the inner wall of the guide member 300 is communicated with the inner wall of the paraffin cleaning body 110, and the inner wall of the paraffin cleaning body 110 is located at the side of the paraffin cleaning body 110 facing the central shaft 400, so that the groove wall 111 of the paraffin cleaning body 110 needs to be arranged at the side of the paraffin cleaning body 110 facing the central shaft 400 to help paraffin to be accumulated on the inner wall of the paraffin cleaning body 110.

According to the technical scheme, the two sides of the paraffin removal body 110 are inwards turned to form the groove-shaped structure, and the groove wall 111 of the paraffin removal body 110 is located on one side, facing the central shaft 400, of the paraffin removal body 110, so that the paraffin amount dropping back to an oil well from the paraffin removal body 110 is reduced, and the paraffin adhered to the paraffin removal body 110 can smoothly enter the guide 300.

As shown in fig. 5, optionally, a wax scraping slope 112 is formed at the bottom of the wax removing body 110 of the present embodiment; the thickness of the wax scraping slope 112 gradually decreases in a direction away from the guide 300; the outer wall of the wax scraping inclined plane 112 away from the central shaft 400 is smoothly connected with the outer wall of the paraffin removal body 110 away from the central shaft 400.

The bottom end of the wax scraping inclined plane 112 has the smallest thickness, which is beneficial for the wax scraping inclined plane 112 to be smoothly inserted into a wax layer on the inner wall of the oil pipe. During the downward movement of the paraffin removal tool, the paraffin gradually separates from the inner wall of the tubing and adheres to the paraffin scraping slope 112 of the paraffin removal body 110. With the downward movement of the paraffin removal tool, the paraffin adhered to the paraffin scraping slope 112 of the paraffin removal body 110 is accumulated upward relative to the paraffin removal body 110 until entering the guide 300.

The outer wall of the paraffin scraping inclined plane 112, which is far away from the central shaft 400, is smoothly connected with the outer wall of the paraffin removing body 110, which is far away from the central shaft 400, so that the paraffin amount adhered to the outer wall of the paraffin scraping inclined plane 112 is favorably reduced, and most of the paraffin adhered to the outer wall of the paraffin scraping inclined plane 112 falls back to the oil well, so that the paraffin amount falling back to the oil well in the cleaning process is favorably reduced.

In the technical scheme, the bottom of the paraffin removal body 110 is provided with the paraffin scraping inclined plane 112; the thickness of the wax scraping slope 112 gradually decreases in a direction away from the guide 300; the outer wall of the paraffin scraping inclined plane 112 far away from the central shaft 400 is smoothly connected with the outer wall of the paraffin removing body 110 far away from the central shaft 400, so that the paraffin scraping inclined plane 112 can be smoothly inserted into a paraffin layer on the inner wall of an oil pipe, and the paraffin amount falling back to an oil well in the cleaning process can be reduced.

As shown in fig. 6, alternatively, in the section through the central shaft 400 in the present embodiment, the inner wall of the guide 300 is curved; the curve includes a first arc 310 and a second arc 320; the first arc 310 and the second arc 320 are smoothly connected; the first circular arc 310 comprises a first end 311 and a second end 312, the second circular arc 320 comprises a third end 321 and a fourth end 322, the inner wall of the guide member 300 is concave upwards, the second end 312 and the third end 321 are coincided at the vertex of the inner wall of the guide member 300, and the connecting line of the first end 311 and the fourth end 322 is perpendicular to the central axis 400; the opening of the guide 300 faces downward.

The inner wall of the curved guide 300, which is formed by the arc, increases the contact area of the paraffin wax with the guide surface compared with a plane, and is beneficial to adhesion and accumulation of the paraffin wax. The inner wall of the guide 300 is recessed upward, which is advantageous in increasing the space of the guide 300 for storing wax.

And because the opening of the guide 300 faces downwards and is opposite to the opening of the collecting cavity 210, most of the paraffin entering the guide 300 can fall into the collecting cavity 210, which is beneficial to the collection of the paraffin and effectively prevents the paraffin entering the guide 300 from falling back to the bottom of the well.

In the technical scheme, the inner wall of the guide piece 300 is in a curve shape in the section passing through the central shaft 400; the curve includes a first arc 310 and a second arc 320; the first arc 310 and the second arc 320 are smoothly connected; the first circular arc 310 comprises a first end 311 and a second end 312, the second circular arc 320 comprises a third end 321 and a fourth end 322, the inner wall of the guide member 300 is concave upwards, the second end 312 and the third end 321 are coincided at the vertex of the inner wall of the guide member 300, and the connecting line of the first end 311 and the fourth end 322 is perpendicular to the central axis 400; the technical means that the opening of the guide 300 faces downwards is beneficial to adhesion and accumulation of paraffin, is also beneficial to enlarging the space for storing the paraffin of the guide 300, and is also beneficial to preventing the paraffin entering the guide 300 from falling back to the bottom of the well.

As shown in fig. 1, optionally, in the present embodiment, the collection chamber 210 is V-shaped in cross section through the central axis 400; the inner wall of the collection chamber 210 is gradually reduced in distance from the central axis 400 in a direction away from the guide 300.

The V-shaped collection cavity 210 can effectively prevent the outer wall of the collection cavity 210 from colliding with the inner wall of the circular truncated cone-shaped paraffin removal part 100, so that the collection cavity 210 is prevented from interfering the accumulation of paraffin on the paraffin removal part 100, for example, the outer wall of the collection cavity 210 scrapes and scratches paraffin adhered to the paraffin removal part 100 to enable the paraffin to fall off and fall back to the bottom of the well, and thus the accumulation of paraffin on the paraffin removal part 100 is facilitated.

In addition, the V-shaped collection cavity 210 has a large opening, so that the paraffin entering the guide member 300 can smoothly enter the collection cavity 210 after being separated from the guide member 300 instead of falling into the oil well while avoiding collision between the outer wall of the collection cavity 210 and the inner wall of the truncated cone-shaped paraffin removal member 100.

In the technical scheme, the collecting cavity 210 is V-shaped in the section passing through the central shaft 400; the technical means that the distance between the inner wall of the collection chamber 210 and the central axis 400 is gradually reduced in the direction away from the guide 300 is beneficial to the accumulation of paraffin on the paraffin removal element 100 and the smooth entry of paraffin which has entered the guide 300 into the collection chamber 210 after leaving the guide 300, rather than the fall into the oil well.

As shown in fig. 1, optionally, the wax-collecting member 200 of the present embodiment includes a connection rod 220, and the connection rod 220 smoothly connects the guide member 300 and the collection chamber 210.

The connecting rod 220 is arranged to firmly connect the collecting cavity 210 with other parts of the paraffin removal tool, which is beneficial to avoiding danger or equipment damage caused by the collecting cavity 210 falling to the bottom of the well after being separated from the paraffin removal tool. And the smooth connection of the guide member 300 and the collection chamber 210 facilitates the smooth entry of a portion of the paraffin accumulated in the guide member 300 into the collection chamber 210 along the connecting rod 220.

According to the technical scheme, the wax collecting piece 200 comprises the connecting rod 220, and the connecting rod 220 is smoothly connected with the guide piece 300 and the collecting cavity 210, so that the collecting cavity 210 is prevented from falling into the bottom of the well after being separated from a paraffin removal tool, and part of paraffin accumulated in the guide piece 300 smoothly enters the collecting cavity 210 along the connecting rod 220.

Alternatively, one end of the connection rod 220 of the present embodiment is detachably connected to the guide 300, and the other end of the connection rod 220 is detachably connected to the collection chamber 210.

The detachable connection between the connecting rod 220 and the guide 300 allows the collection chamber 210 to be detached from the rest of the paraffin removal tool, which facilitates the cleaning of the paraffin removal tool, which is returned to the ground after the paraffin removal operation, by the workers and the emptying of the paraffin from the collection chamber 210.

Meanwhile, under the condition that the collecting cavity 210 is damaged, the collecting cavity 210 can be replaced without scrapping the whole paraffin removal tool, and the maintenance cost of the paraffin removal tool is reduced.

Specifically, the connection between the connection rod 220 and the guide 300 may employ a threaded connection.

Similarly, the connecting rod 220 is detachably connected with the collecting cavity 210, so that the collecting cavity 210 can be separated from the connecting rod 220, and after the paraffin removal tool finishes paraffin removal operation and returns to the ground, workers can respectively clean the connecting rod 220 and the collecting cavity 210 more conveniently.

Meanwhile, under the condition that the collecting cavity 210 or the connecting rod 220 is damaged, the collecting cavity 210 or the connecting rod 220 can be replaced independently without scrapping the whole paraffin removal tool, and the maintenance cost of the paraffin removal tool is reduced.

In particular, the connection between the connecting rod 220 and the collecting chamber 210 may also be a threaded connection.

This technical scheme is favorable to reducing the maintenance cost of paraffin removal instrument owing to adopted the one end and the guide piece 300 detachably of connecting rod 220 to be connected, the other end of connecting rod 220 and the technical means of collecting chamber 210 detachably connection, also is favorable to the staff to clear up the paraffin removal instrument.

As shown in fig. 1, 2 and 7, optionally, the paraffin removal tool of the present embodiment further includes a main rod 500, and a connecting head 700 is connected to a side of the guide 300 away from the collection chamber 210; the connection head 700 serves to connect the main lever 500 and the guide 300.

The coupling head 700 is configured to securely couple the guide 300 to the main shaft 500 of the paraffin removal tool, thereby advantageously avoiding the risk of the collection chamber 210 falling downhole as the guide 300 disengages from the paraffin removal tool or damage to the equipment.

In the technical scheme, the paraffin removal tool further comprises a main rod 500, and one side of the guide piece 300, which is far away from the collection cavity 210, is connected with a connector 700; the technical means by which the connector 700 is used to connect the main rod 500 and the guide 300 is advantageous in preventing the collection chamber 210 from falling downhole as the guide 300 is removed from the paraffin removal tool, which could cause danger or damage to the equipment.

As shown in fig. 1, 2 and 7, optionally, the connection head 700 of the present embodiment is detachably connected to one end of the main lever 500; the other end of the main lever 500 is connected with a wire rope 600.

Detachable is connected between connector 700 and mobile jib 500 for connector 700 can break away from paraffin removal instrument's mobile jib 500, under the impaired condition of connector 700, can in time change the connector 700 that takes place to damage, and need not scrap whole paraffin removal instrument, is favorable to reducing paraffin removal instrument's maintenance cost.

Specifically, the connection between the connector 700 and the main lever 500 may employ a screw connection. As shown in fig. 1 and 2, the top of the connection head 700 is provided with external threads for connection with the main lever 500.

One end of the wire rope 600 is connected to the main rod 500, and the other end of the wire rope 600 is held in the hand of the worker. The arrangement of the steel wire rope 600 is beneficial for workers to control the up-and-down moving speed of the paraffin removal tool along the oil pipe, so that paraffin removal operation can be better performed.

In the technical scheme, the connector 700 is detachably connected with one end of the main rod 500; the other end of mobile jib 500 is connected with wire rope 600's technical scheme, is favorable to reducing the maintenance cost of paraffin removal instrument, also is favorable to the speed that the staff control paraffin removal instrument reciprocated along oil pipe to carry out the paraffin removal operation better.

When the inner wall of the oil pipe is seriously waxed, the cleaning is needed. The operator feeds the paraffin removal tool into the tubing and controls the downward movement of the paraffin removal tool using the wireline 600.

The paraffin removal part 100 is in a circular truncated cone shape, and the diameter of the bottom surface of the paraffin removal part 100 is larger than that of the top surface of the paraffin removal part 100. Therefore, only the bottom of the paraffin removal element 100 collides with the paraffin adhered to the inner wall of the well during the paraffin removal process, i.e., the bottom of the paraffin scraping slope 112 of each paraffin removal body 110 collides with the paraffin adhered to the inner wall of the well.

The bottom end of the wax scraping inclined plane 112 of the wax cleaning body 110 is inserted into the wax layer. During the downward movement of the paraffin removal tool, the paraffin gradually separates from the inner wall of the tubing and adheres to the paraffin scraping slope 112 of the paraffin removal body 110. With the continuous downward movement of the paraffin removal tool, the paraffin adhered to the paraffin scraping inclined surface 112 of the paraffin removal body 110 is accumulated upwards along the paraffin removal body 110.

The cell wall 111 that sets up on the clear wax body 110 can increase the area of contact of adhering paraffin on the clear wax body 110 and clear wax body 110 to increase the frictional force between paraffin and clear wax body 110, make more paraffin adhere on clear wax body 110, be favorable to helping to adhere piling up gradually of paraffin on clear wax body 110, thereby reduce clear wax body 110 and go up the wax volume that paraffin falls back the oil well.

Since the inner wall of the guide 300 is communicated with the inner wall of the paraffin cleaning body 110, the paraffin enters the guide 300 from the paraffin cleaning part 100 without any obstruction, which is beneficial for the paraffin to smoothly enter the guide 300 from the paraffin cleaning part 100.

The inner wall of the curved guide 300, which is formed by the arc, increases the contact area of the paraffin wax with the guide surface compared with a plane, and is beneficial to adhesion and accumulation of the paraffin wax. The inner wall of the guide 300 is recessed upward, which is advantageous in increasing the space of the guide 300 for storing the paraffin.

And because the opening of the guide 300 faces downwards and is opposite to the opening of the collecting cavity 210, most of the paraffin entering the guide 300 can fall into the collecting cavity 210 under the action of gravity, which is beneficial to the collection of the paraffin and effectively prevents the paraffin entering the guide 300 from falling back to the bottom of the well.

In a cross-section through the central axis 400, the collection chamber 210 is V-shaped; the inner wall of the collection chamber 210 is gradually reduced in distance from the central axis 400 in a direction away from the guide 300. The V-shaped collection cavity 210 can effectively prevent the outer wall of the collection cavity 210 from colliding with the inner wall of the truncated cone-shaped paraffin removal part 100, so that the collection cavity 210 is prevented from interfering the accumulation of paraffin on the paraffin removal part 100. The V-shaped collection chamber 210 has a large opening, which facilitates the paraffin that has entered the guide 300 to smoothly enter the collection chamber 210 after leaving the guide 300, rather than falling into the well.

After the paraffin removal operation is completed, one end of the connecting rod 220 is detachably connected with the guide piece 300, and the other end of the connecting rod 220 is detachably connected with the collecting cavity 210, so that the collecting cavity 210 can be separated from other parts of the paraffin removal tool, and the paraffin removal tool for completing the paraffin removal operation and returning to the ground can be cleaned by workers and paraffin in the collecting cavity 210 can be emptied.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The paraffin removal tool is characterized by comprising a paraffin removal part, a paraffin collection part and a guide part, wherein the paraffin removal part is in a circular truncated cone shape, the guide part is fixedly connected with the small-diameter end of the paraffin removal part, the paraffin collection part comprises a collection cavity, the opening of the collection cavity faces upwards, and the guide part extends to the position above the opening of the collection cavity.

2. The paraffin removal tool of claim 1, wherein the paraffin removal member comprises a plurality of paraffin removal bodies extending along a generatrix of the circular table; a plurality of the paraffin removal rings are uniformly distributed around a central shaft; the top end of the paraffin cleaning body is fixedly connected with the guide piece.

3. The paraffin removal tool of claim 2, wherein the two sides of the paraffin removal body are turned inwards to form a groove-shaped structure, and the groove wall of the paraffin removal body is positioned on one side of the paraffin removal body facing the central shaft.

4. The paraffin removal tool of claim 2, wherein the bottom of the paraffin removal body is formed with a paraffin scraping slope; the thickness of the wax scraping inclined plane is gradually reduced in a direction away from the guide piece; the outer wall of the wax scraping inclined plane, which is far away from the central shaft, is smoothly connected with the outer wall of the paraffin removal body, which is far away from the central shaft.

5. The paraffin tool of claim 1, wherein the guide inner wall is curvilinear in cross-section through the central axis; the curve comprises a first arc and a second arc; the first arc and the second arc are smoothly connected; the first arc comprises a first end and a second end, the second arc comprises a third end and a fourth end, the inner wall of the guide piece is concave upwards, the second end and the third end are coincided at the vertex of the inner wall of the guide piece, and the connecting line of the first end and the fourth end is perpendicular to the central axis; the opening of the guide is downward.

6. The paraffin tool of claim 1, wherein the collection chamber is V-shaped in cross-section through the central axis; the inner wall of the collection chamber tapers away from the central axis in a direction away from the guide.

7. The paraffin tool of claim 1, wherein the paraffin collector comprises a connecting rod that smoothly connects the guide and the collection chamber.

8. The paraffin tool of claim 7, wherein one end of the connecting rod is detachably connected to the guide, and the other end of the connecting rod is detachably connected to the collection chamber.

9. The paraffin removal tool of claim 1, further comprising a main rod, wherein a connector is connected to a side of the guide piece away from the collection cavity; the connector is used for connecting the main rod and the guide piece.

10. The paraffin removal tool of claim 9, wherein the connector is removably connected to one end of the main rod; the other end of the main rod is connected with a steel wire rope.