阅读说明：本技术 油井多功能助抽增产装置 (Multifunctional pumping-aid yield increasing device for oil well ) 是由 杨东梅 于 2021-09-07 设计创作，主要内容包括：本发明属于油田井下工具领域,尤其涉及一种油井多功能助抽增产装置,包括杆体和刮蜡件,刮蜡件安装在杆体的外侧,所述刮蜡件上设置有供液体通过的过液通道；所述杆体的外侧设置有闭合轨道槽,所述刮蜡件内有主插销,主插销凸出于刮蜡件的内壁,并插在所述闭合轨道槽内；所述闭合轨道槽的结构包括两个旋转上升单元和一个旋转下降单元,各旋转上升单元与旋转下降单元首尾相连；旋转上升单元和旋转下降单元均包括,竖直上升区段、倾斜上升区段、竖直下降区段和倾斜下降区段。本发明中,刮蜡件通过主插销和闭合轨道槽的配合安装在杆体上,通过对闭合轨道槽的形状进行特别设计,可有效延长刮蜡件的刮蜡范围,改善刮蜡效果。(The invention belongs to the field of downhole tools of oil fields, and particularly relates to a multifunctional pumping-assisting yield-increasing device for an oil well, which comprises a rod body and a wax scraping piece, wherein the wax scraping piece is arranged on the outer side of the rod body, and a liquid passing channel for liquid to pass through is arranged on the wax scraping piece; a closed track groove is formed in the outer side of the rod body, a main bolt is arranged in the wax scraping piece, protrudes out of the inner wall of the wax scraping piece and is inserted into the closed track groove; the structure of the closed track groove comprises two rotary ascending units and a rotary descending unit, and each rotary ascending unit is connected with the rotary descending unit end to end; the rotary lifting unit and the rotary lowering unit each include a vertical lifting section, a slant lifting section, a vertical lowering section, and a slant lowering section. According to the wax scraping device, the wax scraping piece is arranged on the rod body through the matching of the main bolt and the closed track groove, and the wax scraping range of the wax scraping piece can be effectively prolonged and the wax scraping effect is improved through specially designing the shape of the closed track groove.)

1. The utility model provides a multi-functional pumping stimulation device of oil well, includes the body of rod (2) and scrapes wax piece (3), scrapes wax piece (3) and installs the outside at the body of rod (2), it crosses liquid channel (6), its characterized in that to be provided with the confession liquid on wax piece (3) and pass through:

a closed track groove (4) is formed in the outer side of the rod body (2), a main bolt (5) is arranged in the wax scraping piece (3), and the main bolt (5) protrudes out of the inner wall of the wax scraping piece (3) and is inserted into the closed track groove (4);

the structure of the closed track groove (4) comprises two rotary ascending units and a rotary descending unit, and each rotary ascending unit is connected with the rotary descending unit end to form a closed structure of the closed track groove (4);

the rotary ascending unit and the rotary descending unit respectively comprise a vertical ascending section (7), an inclined ascending section (8), a vertical descending section (9) and an inclined descending section (10), wherein the upper end of the vertical ascending section (7) is connected with the lower end of the inclined ascending section (8), the upper end of the inclined ascending section (8) is connected with the upper end of the vertical descending section (9), the lower end of the vertical descending section (9) is connected with the upper end of the inclined descending section (10), and the lower end of the inclined descending section (10) is connected with the lower end of the vertical ascending section (7) in the other rotary ascending unit or rotary descending unit;

in the rotary ascending unit, the lower end of the inclined descending section (10) is higher than the lower end of the vertical ascending section (7), so that the wax scraping piece (3) rotates and ascends along the rod body (2); in the rotary descending unit, the lower end of the inclined descending section (10) is lower than the lower end of the vertical ascending section (7), and by means of the design, the closing structure of the closed track groove (4) can be guaranteed.

2. The multifunctional pumping-assisted stimulation device for the oil well as claimed in claim 1, characterized in that: the liquid passing channel (6) is arranged inside the wax scraping piece (3).

3. The multifunctional pumping-assisted stimulation device for the oil well as claimed in claim 2, characterized in that: the upper end of the wax scraping piece (3) is provided with a circular wax scraping cutting edge (11), the inner side of the wax scraping cutting edge (11) is provided with a cover plate (12), the cover plate (12) is sleeved on the outer side of the rod body (2), and the outer side of the cover plate (12) is matched with the inner side of the wax scraping cutting edge (11) through a conical surface.

4. The multifunctional pumping-assisted stimulation device for the oil well as claimed in claim 1, characterized in that: the inner side of the cover plate (12) is provided with a protruding part (13), and the protruding part (13) is inserted into a vertical descending section (9) in the rotary descending unit and is in sliding fit with the vertical descending section (9).

5. The multifunctional pumping-assisted stimulation device for the oil well as claimed in claim 4, characterized in that: an arc-shaped block (14) capable of rotating and sliding around the axis of the wax scraping piece (3) is arranged inside the lower end of the wax scraping piece (3), and meanwhile, an auxiliary bolt (15) matched with the vertical rising section (7) is arranged inside the wax scraping piece (3);

the axes of the main bolt (5) and the auxiliary bolt (15) are arranged along the radial direction of the wax scraping piece (3); two ends of the arc-shaped block (14) are respectively in sliding fit with the main bolt (5) and the auxiliary bolt (15) through guide inclined planes (16); a trigger inclined plane (18) used for pressing the main bolt (5) is arranged at the bottom of the lower end of the vertical rising section (7) in the rotary rising unit, and the depth of the closed track groove (4) is smaller in the closed track groove (4) along the downward direction of the trigger inclined plane (18) and the downward direction;

in the sliding process of the wax scraping piece (3), after the main bolt (5) starts to enter a section where the trigger inclined plane (18) is located, along with the fact that the wax scraping piece (3) continues to slide downwards, the main bolt (5) moves in the direction away from the rod body (2) along the radial direction under the pressure of the trigger inclined plane (18), then the arc-shaped block (14) is forced to rotate along the axis of the wax scraping piece (3) through the guide inclined plane (16), and along with the movement of the arc-shaped block (14), the auxiliary bolt (15) approaches the rod body (2) under the guide effect of the other pair of guide inclined planes (16) and starts to be inserted into the vertical rising section (7) in the rotary rising unit, so that the vertical rising section (7) is blocked;

one end of the arc-shaped block (14) is provided with a spring (17), and the arc-shaped block (14) always keeps a moving trend of approaching the end where the main bolt (5) is located under the elastic force action of the spring (17).

6. The multifunctional pumping-assisted stimulation device for the oil well as claimed in claim 5, characterized in that: the included angle between the guide inclined plane (16) between the main bolt (5) and the arc block (14) and the axis of the main bolt (5) is less than 45 degrees, and the included angle between the guide inclined plane (16) between the auxiliary bolt (15) and the arc block (14) and the axis of the auxiliary bolt (15) is equal to 45 degrees.

Technical Field

The invention belongs to the field of downhole tools of oil fields, and particularly relates to a multifunctional pumping-assisting yield-increasing device for an oil well.

Background

One of the main characteristics of crude oil in China is high wax content, such as the wax content of crude oil in Daqing, Shenbei, North China, China and other oil fields is more than 14%, wherein the wax content of the crude oil in Daqing and Shenbei is respectively as high as 25-26% and 47.1%. In the process of lifting crude oil to the ground, wax in the crude oil is continuously separated out and attached to the inner wall of an oil pipe along with the reduction of the temperature of the crude oil, so that an oil flow channel is reduced, the flow resistance is increased, the normal work of oil pumping equipment is influenced, the production of an oil well is reduced, and the oil flow channel is completely blocked and stops production in severe cases. Therefore, a wax scraping tool is needed to scrape wax so as to achieve the pumping-assisting purpose.

In the prior art, the wax scraper is connected between two sucker rods in series, and when the pumping unit works, the whole wax scraper moves up and down along with the sucker rods, so that the wax scraper has the defect that the wax scraping range is smaller due to the limitation of the up-and-down reciprocating range of the sucker rods, therefore, if the wax scraper with a larger wax scraping range can be designed, the wax scraping effect can be further improved, and the pumping assisting effect is better.

Disclosure of Invention

The invention provides a multifunctional pumping-assisting yield-increasing device for an oil well, and aims to prolong the wax scraping range and improve the wax scraping effect on the basis of the conventional wax scraper.

The technical problem solved by the invention is realized by adopting the following technical scheme:

the wax scraping device comprises a rod body and a wax scraping piece, wherein the wax scraping piece is arranged on the outer side of the rod body, and a liquid passing channel for liquid to pass through is arranged on the wax scraping piece;

a closed track groove is formed in the outer side of the rod body, a main bolt is arranged in the wax scraping piece, protrudes out of the inner wall of the wax scraping piece and is inserted into the closed track groove;

the structure of the closed track groove comprises two rotary ascending units and a rotary descending unit, and each rotary ascending unit is connected with the rotary descending unit end to form a closed structure of the closed track groove;

the rotary ascending unit and the rotary descending unit respectively comprise a vertical ascending section, an inclined ascending section, a vertical descending section and an inclined descending section, wherein the upper end of the vertical ascending section is connected with the lower end of the inclined ascending section, the upper end of the inclined ascending section is connected with the upper end of the vertical descending section, the lower end of the vertical descending section is connected with the upper end of the inclined descending section, and the lower end of the inclined descending section is connected with the lower end of the vertical ascending section in the other rotary ascending unit or rotary descending unit;

in the rotary ascending unit, the lower end of the inclined descending section is higher than the lower end of the vertical ascending section, so that the wax scraping piece can rotate and ascend along the rod body; in the rotary descending unit, the lower end of the inclined descending section is lower than the lower end of the vertical ascending section, and by means of the design, the closing structure of the closed track groove can be guaranteed.

As a further technical scheme, the liquid passing channel is arranged inside the wax scraping piece.

As a further technical scheme, the upper end of the wax scraping piece is provided with a circular wax scraping cutting edge, the inner side of the wax scraping cutting edge is provided with a cover plate, the cover plate is sleeved on the outer side of the rod body, and the outer side of the cover plate is matched with the inner side of the wax scraping cutting edge through a conical surface.

As a further technical solution, the inner side of the cover plate is provided with a projection which is inserted into and slidably fitted with a vertically descending section in the rotary descending unit.

As a further technical scheme, an arc-shaped block which can rotate and slide around the axis of the wax scraping piece is arranged inside the lower end of the wax scraping piece, and meanwhile, an auxiliary bolt matched with the vertical rising section is arranged inside the wax scraping piece;

the axes of the main bolt and the auxiliary bolt are arranged along the radial direction of the wax scraping piece; two ends of the arc-shaped block are respectively in sliding fit with the main bolt and the auxiliary bolt through the guide inclined planes; a trigger inclined plane used for pressing the main bolt is arranged at the bottom of the lower end of the vertical ascending section in the rotary ascending unit, and the depth of the closed track groove is smaller along the downward direction of the trigger inclined plane in the closed track groove;

in the sliding process of the wax scraping piece, after the main bolt starts to enter a section where the trigger inclined plane is located, the main bolt moves along with the wax scraping piece continuously sliding downwards under the pressure of the trigger inclined plane in the radial direction away from the rod body, then the arc-shaped block is forced to rotate along the axis of the wax scraping piece through the guide inclined plane, and along with the movement of the arc-shaped block, the auxiliary bolt approaches to the rod body under the guide effect of the other pair of guide inclined planes and starts to be inserted into the vertical rising section in the rotary rising unit, so that the vertical rising section is blocked;

one end of the arc-shaped block is provided with a spring, and the arc-shaped block always keeps a moving trend of approaching the end where the main bolt is located under the elastic force action of the spring.

As a further technical scheme, an included angle between a guide inclined plane between the main bolt and the arc-shaped block and the axis of the main bolt is smaller than 45 degrees, and an included angle between a guide inclined plane between the auxiliary bolt and the arc-shaped block and the axis of the auxiliary bolt is equal to 45 degrees.

The invention has the beneficial effects that:

1. according to the wax scraping device, the wax scraping piece is arranged on the rod body through the matching of the main bolt and the closed track groove, the shape of the closed track groove is specially designed, the wax scraping piece can realize passive rotation motion and passive up-and-down reciprocating motion at the same time, the wax scraping piece can be effectively prevented from being worn eccentrically through forcing the wax scraping piece to rotate, the service life of the wax scraping piece is prolonged, the wax scraping range of the wax scraping piece can be effectively prolonged through forcing the wax scraping piece to gradually ascend and descend, and the wax scraping effect is improved.

2. In the invention, the liquid passing channel is arranged in the wax scraping piece, and wax is scraped through the edge of the upper end of the wax scraping piece, so that the wax is scraped more thoroughly. In addition, the invention arranges the liquid passage in the wax scraping piece, and arranges the cover plate above the wax scraping piece, the cover plate can block the liquid passage in the lifting process of the sucker rod, so that the wax scraping piece can form a piston effect in the ascending process of the sucker rod, and the pump effect of the oil well pump can be effectively increased and the pumping-assisting effect can be generated through the synergistic effect of the piston effect and the piston effect at the plunger.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view at A in FIG. 1;

FIG. 3 is a plan expanded view of the closed track slot;

FIG. 4 is a schematic structural view of the rotary elevation unit of FIG. 3;

fig. 5 is a schematic structural view of the rotary drop unit of fig. 3;

FIG. 6 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 7 is a schematic structural view of a third embodiment of the present invention;

FIG. 8 is a cross-sectional view at B in FIG. 7;

FIG. 9 is a cross-sectional view at C in FIG. 7;

FIG. 10 is an enlarged view of a portion of FIG. 7 at D;

figure 11 is a plan expanded view of the closed track slot when the arrangement of figure 7 is used.

In the figure: 1. oil pipe, 2, the body of rod, 3, scrape wax spare, 4, closed track groove, 5, main bolt, 6, cross the liquid passageway, 7, vertical ascending section, 8, slope ascending section, 9, vertical descending section, 10, slope descending section, 11, scrape wax blade, 12, apron, 13, bulge, 14, arc piece, 15, vice bolt, 16, direction inclined plane, 17, spring, 18, trigger inclined plane.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

the first embodiment is as follows:

as shown in fig. 1, the present embodiment includes a rod body 2 and a wax scraping member 3, the wax scraping member 3 is installed outside the rod body 2, and a liquid passing channel 6 for passing liquid is provided on the wax scraping member 3. The above is a common structure in the prior art, and is not described herein again.

As shown in fig. 1, 2 and 3, the innovation of the present invention is to design a specially-structured closed track groove 4, and correspondingly, a main bolt 5 is arranged in the wax scraping piece 3, and the main bolt 5 protrudes out of the inner wall of the wax scraping piece 3 and is inserted into the closed track groove 4. During operation, the wax scraping piece 3 is arranged on the rod body 2 through the matching of the main bolt 5 and the closed track groove 4.

As shown in fig. 3, 4 and 5, the structure of the closed track groove 4 includes two rotary ascending units and one rotary descending unit, and each rotary ascending unit is connected with the rotary descending unit end to form a closed structure of the closed track groove 4. The rotary lifting unit and the rotary descending unit each comprise a vertical lifting section 7, an inclined lifting section 8, a vertical descending section 9 and an inclined descending section 10, wherein the upper end of the vertical lifting section 7 is connected with the lower end of the inclined lifting section 8, the upper end of the inclined lifting section 8 is connected with the upper end of the vertical descending section 9, the lower end of the vertical descending section 9 is connected with the upper end of the inclined descending section 10, and the lower end of the inclined descending section 10 is connected with the lower end of the vertical lifting section 7 in the other rotary lifting unit or rotary descending unit. In the rotary ascending unit, the lower end of the inclined descending section 10 is higher than the lower end of the vertical ascending section 7, so that the wax scraping piece 3 rotates and ascends along the rod body 2; the lower end of the inclined descending section 10 of the rotary descending unit is positioned lower than the lower end of the vertical ascending section 7, and the closed structure of the closed track groove 4 can be ensured by the design.

As shown in fig. 1, the liquid passing channel 6 is arranged inside the wax scraping part 3, and the wax can be scraped more thoroughly by scraping the wax through the annular edge at the upper end of the wax scraping part 3.

The working principle of the invention is as follows:

during operation, the rod body 2 is connected between two adjacent sucker rods through threads and reciprocates up and down together with the sucker rods, and the rod body 2 and the wax scraping piece 3 are completely surrounded by produced liquid in the oil pipe 1.

When the rod body 2 moves downwards, the liquid column in the oil pipe 1 is relatively static with the oil pipe 1, the wax scraping piece 3 is basically kept in a relatively static state with the oil pipe 1 under the limitation of the liquid column, in this case, the wax scraping piece 3 is forced to move upwards relative to the rod body 2, and then the main bolt 5 reaches the intersection point of the inclined ascending section 8 and the vertical descending section 9; when the rod body 2 moves upwards, the wax scraping piece 3 is forced to move downwards relative to the rod body 2, and then reaches the intersection point of the inclined descending section 10 and the next vertical ascending section 7. Based on the principle, after the rod body 2 reciprocates up and down, the wax scraping piece 3 gradually climbs on the rod body 2 under the action of the rotary ascending unit, so that the wax scraping range of the wax scraping piece 3 gradually extends upwards, and after the wax scraping piece 3 climbs to the upper limit position, the wax scraping piece 3 can return to the lower limit position under the action of the vertical descending section 9 in the rotary descending unit, so that the wax scraping piece 3 enters the next up-and-down reciprocating cycle. Therefore, the wax scraping range of the wax scraping piece 3 can be effectively prolonged, and the wax scraping effect is improved. Simultaneously, along with the up-and-down motion of the body of rod 2, under the effect of rotatory unit that rises and rotatory unit that falls, scrape wax piece 3 and can constantly rotate around the body of rod 2, can effectively prevent through rotating to scrape wax piece 3 eccentric wear, effectively improve the life who scrapes wax piece 3.

Example two:

the difference between this embodiment and the first embodiment is that the annular wax scraping edge 11 and the cover plate 12 are added.

As shown in fig. 6, as a further technical solution, an annular wax scraping blade 11 is disposed at the upper end of the wax scraping member 3, a cover plate 12 is disposed inside the wax scraping blade 11, the cover plate 12 is sleeved outside the rod body 2, and the outer side of the cover plate 12 is matched with the inner side of the wax scraping blade 11 through a conical surface. The working principle of the pumping unit is that a plunger connected to the lower end of a sucker rod column is driven by the upward movement of a sucker rod, and liquid in the stratum is pumped into an oil pipe 1 through the piston effect of the plunger and is gradually lifted to the ground. In the invention, the liquid passing channel 6 is arranged in the wax scraping piece 3, the cover plate 12 is also arranged above the wax scraping piece 3, the cover plate 12 can block the liquid passing channel 6 in the lifting process of the sucker rod, so that the piston effect is also formed at the wax scraping piece 3 in the ascending process of the sucker rod, and the pump effect of the oil well pump can be effectively increased and the pumping-assisting effect is generated through the synergistic effect of the piston effect at the position and the piston effect at the position of the plunger piston.

Example three:

the present embodiment is different from the second embodiment in that the weakening effect of the closed track groove 4 on the negative pressure suction effect of the wax scraping member 3 is greatly reduced.

As a further solution, as shown in fig. 7, 8, 9, 10 and 11, the cover plate 12 is provided on its inside with a projection 13, which projection 13 is inserted in the vertically descending section 9 in the rotary descending unit and is in sliding fit with the vertically descending section 9. An arc-shaped block 14 which can rotate and slide around the axis of the wax scraping piece 3 is arranged inside the lower end of the wax scraping piece 3, and meanwhile, an auxiliary bolt 15 matched with the vertical rising section 7 is arranged inside the wax scraping piece 3; the axes of the main bolt 5 and the auxiliary bolt 15 are arranged along the radial direction of the wax scraping piece 3; two ends of the arc-shaped block 14 are respectively in sliding fit with the main bolt 5 and the auxiliary bolt 15 through a guide inclined plane 16; a trigger inclined plane 18 for pressing the main bolt 5 is arranged at the bottom of the lower end of the vertical rising section 7 in the rotary rising unit, and the depth of the closed track groove 4 is smaller in the closed track groove 4 along the downward direction of the trigger inclined plane 18;

in the sliding process of the wax scraping piece 3, after the main pin 5 starts to enter the section where the trigger slope 18 is located, as the wax scraping piece 3 continues to slide downwards, the main pin 5 moves in the direction away from the rod body 2 along the radial direction under the pressure of the trigger slope 18, then the arc-shaped block 14 is forced to rotate along the axis of the wax scraping piece 3 through the guide slope 16, and as the arc-shaped block 14 moves, the auxiliary pin 15 approaches the rod body 2 under the guide effect of another pair of guide slopes 16 and starts to be inserted into the vertical rising section 7 in the rotary rising unit, so that the vertical rising section 7 is blocked; one end of the arc block 14 is provided with a spring 17, and the arc block 14 always keeps the moving trend of approaching to the end where the main bolt 5 is located under the elastic force of the spring 17.

In the present invention, the rod body 2 is provided with the closed track grooves 4, and each cross section has two or three grooves, and the existence of the grooves can obviously and adversely affect the exertion of the piston effect of the wax scraping piece 3. To eliminate this effect, the present invention provides an optimization scheme:

on the one hand, the invention provides a projection 13 on the inner side of the cover plate 12, and the projection 13 is inserted into the vertical descending section 9 in the rotary descending unit to block the section;

on the other hand, an arc-shaped block 14 and an auxiliary bolt 15 are arranged inside the wax scraping piece 3, in the sliding process of the wax scraping piece 3, after the main bolt 5 starts to enter the section where the trigger inclined surface 18 is located, as the wax scraping piece 3 continues to slide downwards, the main bolt 5 moves in the direction away from the rod body 2 along the radial direction under the pressure of the trigger inclined surface 18, then the arc-shaped block 14 is forced to rotate along the axis of the wax scraping piece 3 through the guide inclined surface 16, and as the arc-shaped block 14 moves, the auxiliary bolt 15 approaches the rod body 2 under the guide effect of the other pair of guide inclined surfaces 16 and starts to be inserted into the vertical lifting section 7 in the rotary lifting unit, so that the vertical lifting section 7 is blocked.

Through the two means, the closed track groove 4 can be sealed, so that the negative pressure loss is greatly reduced, and the piston effect of the wax scraping piece 3 is improved.

As a further technical scheme, an included angle between a guide inclined plane 16 between the main bolt 5 and the arc-shaped block 14 and an axis of the main bolt 5 is less than 45 degrees, and an included angle between a guide inclined plane 16 between the auxiliary bolt 15 and the arc-shaped block 14 and an axis of the auxiliary bolt 15 is equal to 45 degrees. After the condition is met, when the main bolt 5 is pressed, the moving distance of the main bolt is smaller than that of the auxiliary bolt 15, and under the condition that the main bolt 5 is not separated from the closed track groove 4, the auxiliary bolt 15 is enough to be inserted into the groove bottom of the closed track groove 4, so that the main bolt 5 and the auxiliary bolt 15 can be both contacted with the groove bottom of the closed track groove 4, and a better sealing effect is achieved.