CN209855723U - High-resistance rotary guide shoe - Google Patents

Abstract

The utility model discloses a high-resistance rotary guide shoe, which comprises a shell, a guide shoe head, a steel ball, an anti-wear ring, an elastic washer and a plug, wherein the guide shoe head is an eccentric head, the left end of the anti-wear ring is connected with the shell, the right end of the anti-wear ring is connected with the shoe guide head, the left end of the shoe guide head penetrates through the anti-wear ring and extends into the shell, and the surfaces of the guide shoe heads, which are contacted with the shell, are provided with semicircular grooves, the two semicircular grooves are combined to contain steel balls, the surfaces of the antiwear rings, which are contacted with the shell, are provided with grooves, the two grooves are spliced together and used for accommodating the elastic gasket, when the elastic washer is normally stressed and is arranged between the two grooves, the antiwear ring is not contacted with the surface of the shell, a gap is reserved, a gap is arranged in the semicircular groove of the guide shoe head, the semicircular groove is divided into two parts in the vertical direction from the circle center position by the gap, and the width of the gap is larger than the width of a gap between the antiwear ring and the shell. Has the advantages that: can reduce the abrasion of the steel balls and prolong the effective working time of the guide shoe.

Description

High-resistance rotary guide shoe

Technical Field

The utility model relates to an oil gas field well cementation and fracturing technical field, concretely relates to rotatory guide shoe of high resistance.

Background

The guide shoe is used as a conventional and necessary tool for operating the pipe string, is widely applied to well cementation, fracturing, well completion and coiled tubing operation, and can effectively reduce the running wear resistance and reduce the running difficulty of the pipe string. However, when the device is operated in an open hole, the well conditions are complex, the well hole is irregular, and the tube string is very easy to block when the tube string is put into the well.

The conventional rotary guide shoe comprises a bearing rotation mode and a steel ball rotation mode, wherein the bearing or the steel ball is always in a stressed state in the process of putting the pipe string in, and the bearing or the steel ball is very easy to wear and lose efficacy particularly when being subjected to large resistance.

Therefore, a novel rotary guide shoe is needed, which can reduce the abrasion of steel balls and prolong the effective working time of the guide shoe.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it is not enough that prior art is overcome to the purpose, provides a rotatory guide shoe is hindered to high resistance, through the clearance design of ring sum shell of wearing to reach the space design of steel ball holding intracavity, guarantees to draw the first when the resistance is little and the resistance is big, and the steel ball can both the auxiliary rotation, has replaced the steel ball pressurized with the pressurized of ring of wearing to wear, thereby effectively reduces the wearing and tearing of steel ball, guarantees the in-process of going into the well, and the guide shoe head can rotate always, effective work.

The purpose of the utility model is achieved through the following technical measures: a high-resistance rotary guide shoe comprises a shell, a guide shoe head, a steel ball, wherein the guide shoe head is an eccentric head, the high-resistance rotary guide shoe further comprises an anti-wear ring, an elastic gasket and a plug, the left end of the anti-wear ring is connected with the shell, the right end of the anti-wear ring is connected with the guide shoe head, the left end of the guide shoe head penetrates through the anti-wear ring to extend into the shell, semicircular grooves are formed in the surface, which is in contact with the shell, of the guide shoe head, can be spliced into a circular accommodating cavity, a channel is formed in the shell and is communicated with the circular accommodating cavity, the steel ball is arranged in the circular accommodating cavity through the channel, the plug is used for plugging the channel, grooves are formed in the surface, which is in contact with the anti-wear ring, the two grooves are spliced together for accommodating the elastic gasket, when the elastic gasket is normally stressed and is arranged between the two grooves, the surface of the guide shoe, a gap is arranged in the semicircular groove of the guide shoe head, the semicircular groove is divided into two parts in the vertical direction from the circle center position by the gap, and the width of the gap in the semicircular groove of the guide shoe head is larger than the width of a gap between the antiwear ring and the shell.

Further, when the elastic washer is compressed until the antiwear ring is in contact with the surface of the housing, the antiwear ring is subjected to pressure.

Further, when the antiwear ring contacts with the surface of the shell, the steel balls can rotate in the circular accommodating cavity.

Compared with the prior art, the beneficial effects of the utility model are that: 1. through the clearance design of ring and shell of wearing to reach the space design of steel ball holding intracavity, guarantee to draw the shoe head no matter when the resistance is little and when the resistance is big, the steel ball can both assist rotatoryly. 2. When the guide shoe head is subjected to large resistance, the antiwear ring is used for replacing the steel ball to bear pressure, so that the abrasion of the steel ball is avoided.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural view of a high-resistance rotary guide shoe.

Fig. 2 is a schematic structural view of the housing.

Figure 3 is a schematic diagram of the structure of the antiwear ring.

Fig. 4 is a schematic structural view of the toe cap.

Fig. 5 is an enlarged schematic view of a semicircular groove portion on the leader.

The anti-wear shoe comprises a shell 1, a plug 2, a steel ball 3, an anti-wear ring 4, a shoe guide head 5 and an elastic washer 6.

Detailed Description

In the embodiment, as shown in fig. 1 to 5, a high-resistance rotation guide shoe comprises a shell 1, a guide shoe head 5, a plurality of steel balls 3, a eccentric guide shoe head 5, a plurality of steel balls 3, an anti-wear ring, an elastic washer 6 and a plug 2, wherein the left end of the anti-wear ring is connected with the shell 1, the right end of the anti-wear ring is connected with the guide shoe head 5, the left end of the guide shoe head 5 penetrates through the anti-wear ring and extends into the shell 1, semicircular grooves are formed in the surface of the guide shoe head 5, which is in contact with the shell 1, the two semicircular grooves can be spliced into a circular accommodating cavity, a channel is formed in the shell 1 and is communicated with the circular accommodating cavity, the steel balls 3 are arranged in the circular accommodating cavity through the channel, the plug 2 is used for plugging the channel, grooves are formed in the surface of the anti-wear ring, which is in contact with the shell 1, and the two grooves are spliced together for accommodating the elastic, when the elastic washer 6 is normally stressed and is arranged between the two grooves, the antiwear ring is not in contact with the surface of the shell 1, a gap is formed between the antiwear ring and the surface of the shell 1, a gap is arranged in the semicircular groove of the guide shoe head 5, the width of the gap is D as shown in the detailed drawing 5, the semicircular groove of the guide shoe head 5 is divided into two parts in the vertical direction from the circle center position by the gap, and the width D of the gap in the semicircular groove of the guide shoe head 5 is larger than the width of the gap between the antiwear ring and the shell 1. When leading the first 5 of shoes to be less by the atress, elastic washer 6 atress, steel ball 3 plays supplementary rotatory effect when leading the first 5 of shoes rotatory, when leading the first 5 of shoes by the atress great, elastic washer 6 is compressed, wear-resisting ring contacts with the surface of shell 1, and the first 5 of shoes is leading under the effect of resistance inside the shell 1 further to stretch into, at this moment, replace elastic washer 6 pressurized by wear-resisting ring, under the assurance in the first 5 semicircle recess spaces of leading the shoes, steel ball 3 still has sufficient space can assist rotatory. The elastic washer can be made of wear-resistant plastic materials such as polytetrafluoroethylene, polyethylene, polypropylene, polyformaldehyde and the like. As for the basic working principle of the eccentric head rotary guide shoe, the description is omitted here for the prior art.

The words used in this document with respect to direction indication are directions between the parts in the figure when facing the figure, such as the "left" end of the wear ring, i.e. the end near the housing as shown in the figure.

Claims (3)

1. The utility model provides a rotatory guide shoe of high resistance, includes the shell, draws the toe cap, and the steel ball draws the toe cap to be eccentric head, its characterized in that: the anti-wear shoe comprises a shell, and is characterized by further comprising an anti-wear ring, an elastic washer and a plug, wherein the left end of the anti-wear ring is connected with the shell, the right end of the anti-wear ring is connected with a shoe guide head, the left end of the shoe guide head penetrates through the anti-wear ring to extend into the shell, semicircular grooves are formed in the surface, which is contacted with the shell, of the shoe guide head, the two semicircular grooves can be spliced into a circular accommodating cavity, a channel is formed in the shell and communicated with the circular accommodating cavity, steel balls are arranged in the circular accommodating cavity through the channel, the plug is used for plugging the channel, grooves are formed in the surface, which is contacted with the shell, of the anti-wear ring, the two grooves are spliced together and used for accommodating the elastic washer, when the elastic washer is normally stressed and arranged between the two grooves, the anti-wear ring is not contacted with the surface of the shell, a gap is formed, the width of a gap in the semicircular groove of the shoe guide head is larger than the width of a gap between the antiwear ring and the shell.

2. The high resistance rotary guide shoe according to claim 1, wherein: when the elastic gasket is compressed until the antiwear ring is in contact with the surface of the shell, the antiwear ring bears pressure.

3. The high resistance rotary guide shoe according to claim 2, wherein: when the antiwear ring contacts with the surface of the shell, the steel balls can rotate in the circular accommodating cavity.