CN114753805A - Multifunctional scraping eccentric guider - Google Patents

Abstract

The invention discloses a multifunctional scraping eccentric guider which comprises a pipe body, wherein the surface of the pipe body is fixedly connected with three groups of centering blocks, two groups of steel wire brushes are embedded among the three groups of centering blocks, and the two groups of centering blocks are longitudinally distributed on the same straight line along the length direction of a base pipe wall. According to the invention, through the scraping device at the upper part, the steel wire is woven into a spiral shape, the length of the steel wire is more than 15% of the diameter of the drill bit, the steel wire can well scrape a virtual mud cake on a well wall, a good condition is provided for cementing cement and the well wall, the guider at the lower part is designed into the eccentric guide shoe with the bearing, the spiral-shaped guide shoe is particularly suitable for a large-well-inclined directional well with multiple targets, a large-displacement well and a smart well with complex obstacle-detouring track, and can smoothly pass through when a dog leg or an inflection point is encountered, so that the occurrence of an obstacle-encountering clamping accident when the casing is lowered is avoided, the casing can be guided to the well bottom smoothly, the spiral-shaped guide shoe is particularly suitable for casing lowering of a large-displacement well with multiple targets, a horizontal well and a complex obstacle-detouring track, and the lower part structure of the casing is shortened.

Description

Multifunctional scraping eccentric guide

technical field

The invention relates to the technical field of scraping guides, in particular to a multifunctional scraping eccentric guide.

Background technique

In oilfield development projects, oil wells, gas wells or water wells are usually used as injection-production pipelines. However, due to the complexity of the injection-production medium, the tubing wall will be fouled after a period of use. With the prolongation of the use time, the scale deposits are continuously deposited on the wall of the tubing, resulting in the reduction of the passable area of the tubing, which leads to the problem that the downhole tool cannot be produced. At present, the scraper is usually used in the prior art. The scale is scraped off. The scraper usually includes a scraper body and a scraper blade; the scraper body is driven to rotate by a driving device, so that the scraper blade is used to scrape the scale on the wall of the oil pipe, so as to improve the success of tool running and operation In the process of using the existing scraping guide, it is not suitable for large well inclination, multi-target directional wells, large-reach wells and smart wells with complex obstacle trajectories. When encountering "dog legs" and "inflection points" When the casing cannot pass through, it is prone to the occurrence of an accident when the casing is blocked and stuck.

SUMMARY OF THE INVENTION

The purpose of the invention is to provide a multifunctional scraping eccentric guide, which has the advantages of strong adaptability and improved efficiency, and solves the problem that the existing scraping guide is not suitable for directional wells with large well inclination and multiple targets during the use process. Large-reach wells and smart wells with complex obstacle trajectories cannot pass through when encountering "doglegs" and "inflection points", which are prone to the problem of accidents when the casing is blocked and stuck.

In order to achieve the above purpose, the present invention provides the following technical solutions: a multifunctional scraping eccentric guide, including a pipe body, the surface of the pipe body is fixedly connected with a centralizing block, the number of the centralizing blocks is three groups, and the number of the three groups of centralizing blocks is There are two sets of wire brushes inlaid between them. The two sets of righting blocks are longitudinally distributed on the same straight line along the length direction of the base pipe wall. There is a groove between, the wire brush is embedded in the inner wall of the groove, the shape of the groove is a positive rotation and a reverse rotation arrangement, the centering block and the wire brush are both protruding from the base pipe wall, and the wire brush is along the The length direction of the pipe wall forms a convex lug, and the pipe walls on the left and right sides of each adjacent two convex lugs are lower than the convex lugs to form a spiral channel diversion groove. The curved surface is elongated, the steel wires are woven into spiral steel wire bundles, and the steel wire bundles are all U-shaped. The left side of the pipe body is connected with a guide shoe, and the guide shoe includes an eccentric guide shoe and a connecting pipe. The connecting pipe The inner cavity is provided with an inner thread, and the connecting pipe is threadedly connected with the pipe body through the inner thread.

Preferably, the length of the wire brush wire is greater than 15% of the diameter of the drill bit, and protruding from the base pipe wall is divided into a left-handed group and a right-handed group.

Preferably, the steel wire at the top of the wire brush is higher than the height of the centering block, and the two groups of wire brushes are in forward and reverse directions.

Preferably, the surface of the main board is provided with holes, the steel wire passes through two adjacent holes, and both ends protrude to the same side of the main board.

Preferably, the main plates are respectively inlaid in the left-handed and right-handed grooves between the centralizing blocks at both ends and the middle centralizing block, and the left-handed and right-handed main plates are consistent in shape and structure with the left-handed and right-handed grooves.

Preferably, the surface of the connecting pipe and the surface of the eccentric shoe are provided with water outlet holes, and the connecting pipe is a hollow cylinder.

Preferably, bearing balls are sleeved on the right side of the surface of the eccentric shoe guide, the number of the bearing balls is two groups, and the inner wall of the connecting pipe is provided with a bearing sleeve matched with the bearing balls.

Preferably, the head of the eccentric shoe is a hollow rugby ball with a through hole leading to the inner cavity, and a part is side-cut along the top of the ball toward one of the water outlet holes so that the water outlet hole is located in the middle of the oblique section.

Preferably, the main board is made of steel, and the steel wire is made of manganese steel.

Preferably, a threaded connection post is fixedly connected to the left side of the pipe body, and the pipe body is threadedly connected to the connection pipe through the threaded connection post.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. The present invention uses the upper scraping device, the steel wire is woven into a spiral shape, and the length is 15% greater than the diameter of the drill bit, which can well scrape the virtual mud cake on the well wall, provide good conditions for cement and well wall bonding, and guide the lower part. The device is designed as an eccentric guide shoe with bearings, which is especially suitable for directional wells with large well deviation and multiple targets, large-reach wells and smart wells with complex obstacle trajectories. It avoids the occurrence of the accident when the casing is blocked or stuck, and can guide the casing to go down to the bottom of the hole smoothly. It is especially suitable for the use of casing in the wellbore with large displacement, multiple targets, horizontal wells, and complicated trajectory around obstacles, and shortens the casing. The lower structure greatly saves drilling costs.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the front view schematic diagram of the pipe body structure of the present invention;

Fig. 3 is the connection schematic diagram of the eccentric guide shoe and the connecting pipe of the present invention;

4 is a schematic diagram of a left-handed structure of a wire brush of the present invention;

Fig. 5 is the schematic diagram of the right-handed structure of the wire brush of the present invention;

Fig. 6 is the three-dimensional schematic diagram of the connecting pipe structure of the present invention;

FIG. 7 is a schematic top view of the connection structure of the pipe body and the centralizing block according to the present invention.

In the figure: 1. Pipe body; 2. Righting block; 3. Steel wire brush; 31. Main board; 32. Steel wire; 4. Groove; 5. Guide shoe; 51, Eccentric guide shoe; Hole; 7. Bearing ball; 8. Threaded connection column.

Detailed ways

The technical solutions in 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to Figure 1-7, the multi-functional scraping eccentric guide includes a pipe body 1, and the surface of the pipe body 1 is fixedly connected with a centralizing block 2, the number of the centralizing blocks 2 is three groups, and two centralizing blocks 2 are inlaid between the three groups. A set of wire brushes 3, two sets of righting blocks 2 are longitudinally distributed on the same straight line along the length direction of the base pipe wall, and the axial direction of the middle set of righting blocks 2 deviates from one side of the pipe wall, at an angle of 45-90 degrees, between the righting blocks 2 There is a groove 4, the wire brush 3 is inlaid on the inner wall of the groove 4, the shape of the groove 4 is a positive rotation and a reverse rotation arrangement, the centering block 2 and the wire brush 3 both protrude from the base pipe wall, and the wire brush 3 is along the length of the pipe wall. The direction forms convex ridges, and the tube walls on the left and right sides of each adjacent two ridges are lower than the ridges to form a spiral channel diversion groove. The wire brush 3 includes a main board 31 and a steel wire 32. Shape, the steel wire 32 is woven into a helical steel wire bundle, the steel wire bundle is U-shaped, the left side of the pipe body 1 is communicated with a guide shoe 5, and the guide shoe 5 includes an eccentric guide shoe 51 and a connecting pipe 52, and the inner cavity of the connecting pipe 52 is provided There is an inner thread, the connecting pipe 52 is connected with the pipe body 1 through the inner thread, and the steel wire 32 is woven into a spiral shape through the upper scraping device, and the length is 15% greater than the diameter of the drill bit, which can well scrape the virtual mud cake on the well wall. , to provide good conditions for cement and wellbore bonding, the lower guide is designed as an eccentric guide shoe 51 with a bearing, which is especially suitable for directional wells with large well inclination and multiple targets, large-reach wells and smart wells with complex obstacle trajectories. When encountering "dog legs" and "inflection points", it can pass through smoothly, avoiding the occurrence of casing jamming and blocking accidents, and can guide the casing to smoothly go down to the bottom of the well, especially suitable for large displacement, multi-target, horizontal wells . The use of casing in the wellbore with complex trajectory around the obstacle can shorten the structure of the lower casing of the casing and greatly save the cost of drilling.

The length of the steel wire 32 of the wire brush 3 is greater than 15% of the diameter of the drill bit. It protrudes from the basic pipe wall and is divided into left-handed and right-handed groups. There is a """ or """ type spiral channel between each adjacent two pieces of steel wire 32, and the fluid passes through When the swirl flow is generated, the flushing efficiency and the replacement efficiency can be improved. The main board 31 of the two sets of wire brushes 3 is a curved strip that fits the basic pipe wall. quality.

The steel wire 32 on the top of the wire brush 3 is higher than the height of the centering block 2, and the two groups of wire brushes 3 are in positive and negative directions.

The surface of the main board 31 is provided with holes, the steel wire 32 passes through two adjacent holes, and both ends protrude to the same side of the main board 31. The "U"-shaped steel wire 32 passes through the main board 31 hole technology, which can avoid the welding process. The brittleness of the steel wire 32 is increased, and it is easy to be broken during use, so as to prevent the steel wire 32 from being pulled out and broken during use.

The main plates 31 are respectively embedded in the left-handed and right-handed grooves 4 between the two end centralizers 2 and the middle centralizer 2 .

The surface of the connecting pipe 52 and the surface of the eccentric shoe 51 are both provided with water outlet holes 6, and the connecting pipe 52 is a hollow cylinder.

The right side of the surface of the eccentric guide shoe 51 is sleeved with bearing balls 7 , and the number of the bearing balls 7 is two groups.

The head of the eccentric guide shoe 51 is a hollow rugby ball, with a through hole leading to the inner cavity, and a part is cut sideways along the top of the ball toward one of the water outlet holes 6, so that the water outlet hole 6 is located in the middle of the oblique section, and the lower guide is designed as The eccentric guide shoe 51 with bearing is especially suitable for directional wells with large well inclination and multiple targets, large-reach wells and smart wells with complex trajectory around obstacles. When encountering "dog legs" and "inflection points", it can pass smoothly, avoiding the occurrence of accidents when the casing is blocked and stuck.

The main board 31 is made of steel, and the steel wire 32 is made of manganese steel.

A threaded connection post 8 is fixedly connected to the left side of the pipe body 1 , and the pipe body 1 is threadedly connected to the connection pipe 52 through the threaded connection post 8 .

When in use, the main board 31 is embedded into the left-handed and right-handed grooves 4 between the two ends of the centralizing block 2 and the middle centralizing block 2 respectively. It is combined with the basic pipe wall to increase the degree of bonding and firmness. At the same time, the "U"-shaped steel wire 32 is pressed down, and the "U"-shaped steel wire 32 is passed through the main board 31 hole technology, which can avoid the increase in the brittleness of the steel wire 32 due to the welding process. It is easy to break when the wire 32 is pulled out and broken during use. When the top of the guide shoe 5 encounters resistance during the working process, the head of the eccentric guide shoe 51 will automatically swing its head when it is stressed and continue to work.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. Multi-functional eccentric director of scraping, including body (1), its characterized in that: the pipe body (1) is fixedly connected with centering blocks (2) on the surface, the number of the centering blocks (2) is three, two groups of steel wire brushes (3) are embedded among the three groups of centering blocks (2), the two groups of centering blocks (2) are longitudinally distributed on the same straight line along the length direction of a basic pipe wall, the axis direction of the middle group of centering blocks (2) deviates to one side of the pipe wall, the angle is 45-90 degrees, grooves (4) are formed among the centering blocks (2), the steel wire brushes (3) are embedded in the inner wall of the grooves (4), the grooves (4) are arranged in a forward rotation and reverse rotation mode, the centering blocks (2) and the steel wire brushes (3) protrude out of the basic pipe wall, the steel wire brushes (3) form ridges along the length direction of the pipe wall, the left side pipe wall and the right side pipe wall of each two adjacent ridges are lower than the ridges to form spiral channel guide grooves, the steel wire brushes (3) comprise main boards (31) and steel wires (32), the main board (31) is a curved surface strip-shaped body attached to the wall of the base pipe, the steel wires (32) are woven into spiral steel wire bundles, the steel wire bundles are U-shaped, the left side of the pipe body (1) is communicated with a guide shoe (5), the guide shoe (5) comprises an eccentric guide shoe (51) and a connecting pipe (52), an inner cavity of the connecting pipe (52) is provided with an internal thread, and the connecting pipe (52) is in threaded connection with the pipe body (1) through the internal thread.

2. The multi-functional scraping eccentric guide of claim 1, characterized in that: the length of the steel wire (32) of the steel wire brush (3) is larger than 15% of the diameter of the drill bit, and the steel wire protrudes out of the wall of the base pipe and is divided into a left-handed group and a right-handed group.

3. The multi-functional scraping eccentric guide of claim 1, characterized in that: the top steel wire (32) of the steel wire brush (3) is higher than the height of the righting block (2), and the two groups of steel wire brushes (3) are in the positive and negative directions.

4. The multi-functional scraping eccentric guide of claim 1, characterized in that: holes are formed in the surface of the main board (31), the steel wire (32) penetrates through the two adjacent holes, and two ends of the steel wire extend out of the same side of the main board (31).

5. The multi-functional scraping eccentric guide of claim 1, characterized in that: the main board (31) is respectively embedded in the left-handed and right-handed grooves (4) between the two end righting blocks (2) and the middle righting block (2), and the left-handed and right-handed main boards (31) are matched with the left-handed and right-handed grooves (4) in shape and structure.

6. The multi-functional scraping eccentric guide of claim 1, characterized in that: apopores (6) have all been seted up on the surface of connecting pipe (52) and the surface of eccentric guide shoe (51), connecting pipe (52) are hollow cylinder.

7. The multi-functional scraping eccentric guide of claim 1, characterized in that: the right side cover on eccentric guide shoe (51) surface is equipped with bearing ball (7), the quantity of bearing ball (7) is two sets of, the inner wall of connecting pipe (52) is provided with the bearing housing who forms a complete set with bearing ball (7).

8. The multi-functional scraping eccentric guide of claim 1, characterized in that: the head of the eccentric guide shoe (51) is in a hollow football shape, a through hole leading to the inner cavity is formed, and a part of the eccentric guide shoe is cut to the side of one water outlet hole (6) along the top of the ball so that the water outlet hole (6) is positioned in the middle of the inclined plane.

9. The multi-functional scraping eccentric guide of claim 1, characterized in that: the main plate (31) is made of steel materials, and the steel wires (32) are made of manganese steel materials.

10. The multi-functional scraping eccentric guide of claim 1, characterized in that: the left side fixedly connected with screw thread spliced pole (8) of body (1), body (1) passes through screw thread spliced pole (8) and connecting pipe (52) threaded connection.

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