CN212671715U

CN212671715U - Double-helix wax scraping plunger

Info

Publication number: CN212671715U
Application number: CN202021005372.0U
Authority: CN
Inventors: 段玉明; 都小川; 都剑波; 许弟文
Original assignee: Sichuan Taihe Petroleum Technology Co ltd
Current assignee: Sichuan Taihe Petroleum Technology Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-03-09
Anticipated expiration: 2030-06-04

Abstract

The utility model discloses a double-helix wax scraping plunger, which comprises a plunger main body and scrapers sleeved on the plunger main body, wherein each scraper comprises a spiral scraping blade and a hollow cylindrical rotating column, a plurality of scraping blades with the same spiral direction are uniformly distributed on the outer side of the rotating column, two ends of each scraping blade are respectively positioned at two ends of the rotating column, and a gap is formed between the two scraping blades; the plunger main body is provided with two scrapers, and the spiral directions of the scrapers on the two scrapers are opposite.

Description

Double-helix wax scraping plunger

Technical Field

The utility model relates to an oil recovery gas supporting tool field especially relates to a wax plunger is scraped to double helix.

Background

Oil gas well paraffin removal mode: mechanical paraffin removal (common use), thermal paraffin removal, chemical agent paraffin removal, microbial paraffin removal, plunger paraffin removal and the like, wherein the paraffin removal mode has high process safety risk and high production cost; the conventional wax scraping plunger is of a cylindrical structure, the longitudinal section of the conventional wax scraping plunger is in an I shape, a plurality of annular scraping blades are arranged on the outer wall of the wax scraper, the cylindrical scraping blades are of an integrated processing structure, the outer diameter size of the cylindrical scraping blades is consistent, the annular blades cannot move, and the wax or other wax in the production process can be prevented from being accumulated on the wall of an oil pipe only by utilizing the vertical reciprocating operation of the plunger in a scraping mode, so that the efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a wax plunger is scraped to double helix has the improvement technology security, improves production efficiency, practices thrift manufacturing cost's advantage.

The technical scheme of the utility model is that:

a double-helix wax scraping plunger comprises a plunger body and scrapers sleeved on the plunger body, wherein each scraper comprises a spiral scraping blade and a hollow cylindrical rotating column, a plurality of scraping blades with the same spiral direction are uniformly distributed on the outer side of the rotating column, two ends of each scraping blade are respectively positioned at two ends of the rotating column, and a gap is formed between the two scraping blades;

the plunger main body is provided with two scrapers, and the spiral directions of the scrapers on the two scrapers are opposite.

The working principle of the technical scheme is as follows:

when the plunger main body runs in the oil pipe, the scraper is divided into a spiral structure in the forward direction and the reverse direction, so that the penetrability of gas and liquid and smaller movement resistance can be effectively ensured no matter the plunger main body runs upwards from the bottom of the well or falls back downwards from the top of the well; when gas and liquid pass through the gap between the scraping blades, the gas and the liquid can do the rotating actions of positive rotation and negative rotation by depending on the basic hydraulics principle, thereby ensuring the cutting action of the scraping blades during rotation; through the technical scheme, the wax precipitation well realizes high-efficiency automatic wax removal instead of mechanical wax removal and other related operations, ensures process safety and saves production cost investment.

In a further technical scheme, a central column is arranged in the middle of the plunger main body, the two scrapers are arranged on the central column, and bearings are arranged at two ends of the two rotating columns.

The working principle of the technical scheme is as follows:

the center post provides a support point for the rotation of the scraper blade while utilizing bearings to reduce friction between the scraper blade and the center post.

In a further technical scheme, the radian of an arc formed by the projection of one wiper blade on one end surface of the rotating column is as follows: 60 to 120 degrees.

The working principle of the technical scheme is as follows:

the problem of because of the less rotatory less problem of the column that leads to of the scope of doctor-bar coverage to and because of the coverage of doctor-bar is great, lead to the helping hand that the doctor-bar received great problem is solved.

In a further technical scheme, a positioning ring is arranged between the two scrapers and fixed on the plunger main body, and bearings are arranged on two sides of the positioning ring.

The working principle of the technical scheme is as follows:

the positioning ring can avoid the problem that the bearing and the scraper are stressed to generate axial displacement.

The utility model has the advantages that:

1. when the plunger main body runs in the oil pipe, the scraper is divided into a spiral structure in the forward direction and the reverse direction, so that the penetrability of gas and liquid and smaller movement resistance can be effectively ensured no matter the plunger main body runs upwards from the bottom of the well or falls back downwards from the top of the well; when gas and liquid pass through the gap between the scraping blades, the gas and the liquid can do the rotating actions of positive rotation and negative rotation by depending on the basic hydraulics principle, thereby ensuring the cutting action of the scraping blades during rotation; by the technical scheme, the wax precipitation well realizes high-efficiency automatic wax removal instead of mechanical wax removal and other related operations, so that the process safety is ensured, and the production cost investment is saved;

2. the central column provides a supporting point for the rotation of the scraper, and meanwhile, the friction between the scraper and the central column is reduced by utilizing a bearing;

3. the problem that the rotating speed of the rotary column is small due to the fact that the coverage range of the scraping blade is small and the problem that the assisting force of the scraping blade is large due to the fact that the coverage range of the scraping blade is large are solved;

4. the positioning ring can avoid the problem that the bearing and the scraper are stressed to generate axial displacement.

Drawings

Fig. 1 is a schematic structural diagram of a double-helix wax scraping plunger according to the present invention;

fig. 2 is a schematic structural view of the scraper of the present invention;

fig. 3 is a full-section schematic view of the double-helix wax scraping plunger of the utility model.

Description of reference numerals:

10. a plunger body; 11. a central column; 21. a first scraper; 22. a second scraper; 23. a spin column; 24. Scraping a blade; 30. a retaining ring.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Example (b):

as shown in fig. 1 and 2, a double-helix wax scraping plunger comprises a plunger body 10 and scrapers, wherein the scrapers comprise a first scraper 21 and a second scraper 22, the first scraper 21 and the second scraper 22 are both arranged in the middle of the plunger body 10, when the plunger body 10 moves towards a pipe orifice or a pipe bottom in an oil pipe, the first scraper 21 and the second scraper 22 can independently rotate, the axes of the rotation of the first scraper 21 and the second scraper 22 are collinear with the axis of the plunger body 10, and meanwhile, the rotation directions of the first scraper 21 and the second scraper 22 are opposite;

the scraper comprises scraping blades 24 and a rotating column 23, the scraping blades 24 are spiral, the cross section of the scraping blades 24 is trapezoidal, meanwhile, the lower bottom edge of the trapezoid is arranged on the outer wall of the rotating column 23, the rotating column 23 is hollow cylindrical, the rotating column 23 is sleeved on the plunger main body 10, meanwhile, the rotating column 23 is rotatably connected with the plunger main body 10, for example, a bearing is connected, a plurality of scraping blades 24 are arranged on the outer cylindrical surface of the rotating column 23, the spiral directions of all the scraping blades 24 are the same, a gap exists between two adjacent scraping blades 24, the gap between each scraping blade 24 is the same, one end of each scraping blade 24 is located at one end part of the rotating column 23, the other end of each scraping blade 24 is located at the other end of the rotating column 23, and the falling direction of the scraping blade 24 on the first scraping blade 21 on the plunger main body 10 is opposite to the spiral;

when the plunger body 10 runs in an oil pipe, because the scraping blades 24 on the first scraping blades 21 and the scraping blades 24 on the second scraping blades 22 are in a forward and reverse spiral structure, the passing performance of gas and liquid and smaller movement resistance can be effectively ensured no matter the plunger body 10 runs upwards from the bottom of the well or falls back downwards from the top of the well; when gas and liquid pass through the gap between the scraping blades 24, the gas and liquid can do the rotating actions of forward rotation and reverse rotation by depending on the basic hydraulics principle, thereby ensuring the cutting action of the scraping blades during rotation; through the technical scheme, the wax precipitation well realizes high-efficiency automatic wax removal instead of mechanical wax removal and other related operations, ensures process safety and saves production cost investment.

In another embodiment:

as shown in fig. 3, a central column 11 is arranged in the middle of the plunger main body 10, the diameter of the central column 11 is smaller than the diameter of the two ends of the plunger main body 10, so that the axial section of the whole plunger main body 10 is i-shaped, the outer diameter of the rotating column 23 is equal to the diameter of the two ends of the plunger main body 10, and the two scrapers are rotatably connected to the central column 11;

the diameter of the rotary columns 23 is equal to that of the plunger, and two ends of each rotary column 23 are respectively provided with a bearing, the bearings are deep groove ball bearings, and the bearings can reduce friction between the scraper and the central column 11;

by installing the scraper on the central column 11 with the diameter smaller than the two ends of the plunger main body 10, the whole scraper 24 is positioned outside the plunger main body 10, so that the scraper 24 can be in better contact with the oil pipe, and the efficiency of scraping wax is improved.

In another embodiment:

the scraping blade 24 is spirally arranged on the rotating column 23, the projection of the joint of the scraping blade 24 and the rotating column 23 on the end face of one end of the rotating column 23 forms a section of circular arc, the center of the circular arc is superposed with the center of the end face of the rotating column 23, and the radian corresponding to the circular arc is 60-120 degrees;

if the radian corresponding to the arc is small, when the plunger body 10 moves towards the pipe orifice or the pipe bottom in the oil pipe, the rotating speed of the rotating column 23 is small, so that the wax scraping efficiency is low; if the radian corresponding to the arc is large, when the plunger body 10 moves towards the pipe orifice or the pipe bottom in the oil pipe, the rotating speed of the rotary column 23 is small due to the large resistance of the scraping blade 24; the wax scraping efficiency of the double-helix wax scraping plunger is not facilitated.

In another embodiment:

as shown in fig. 1 and 3, a positioning ring 30 is disposed in the middle of the central column 11, the diameter of the positioning ring 30 is equal to the diameter of the rotating column 23, the positioning ring 30 is located between the first scraper 21 and the second scraper 22, and the two scrapers located on the central column 11 are respectively positioned by the positioning ring 30, so that the problem of axial displacement of the bearings and the scrapers due to stress is avoided.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A double-helix wax scraping plunger comprises a plunger body and scrapers sleeved on the plunger body, and is characterized in that the scrapers comprise spiral scraping pieces and a hollow cylindrical rotating column, a plurality of scraping pieces with consistent spiral directions are uniformly distributed on the outer side of the rotating column, two ends of each scraping piece are respectively positioned at two ends of the rotating column, and a gap is formed between the two scraping pieces;

2. The double-helix wax scraping plunger as claimed in claim 1, wherein a central column is provided in the middle of the plunger body, two of the scrapers are provided on the central column, and bearings are provided at both ends of the two rotating columns.

3. The double helix wax scraping plunger according to claim 1, wherein a projection of one of the scraping blades onto an end surface of the rotating cylinder forms an arc having an arc: 60 to 120 degrees.

4. The double helix wax scraping plunger of claim 2, wherein a positioning ring is disposed between the two scraping blades, the positioning ring is fixed to the plunger body, and the bearings are disposed on two sides of the positioning ring.