Self-righting structure for thermal recovery packer

Abstract

The utility model relates to the technical field of oil extraction machinery, and discloses a self-righting structure for a thermal recovery packer, which comprises a shell, a fixed plate is fixedly connected in the shell, a transmission rod is rotatably connected between the fixed plate and the bottom wall of the shell through a bearing, and a plurality of oil extraction holes are formed in the transmission rod. The upper end of the transmission rod penetrates through and extends to the upper side of the fixing plate, the lower end of the transmission rod penetrates through and extends to the lower side of the shell and is fixedly connected with a crank, and a righting mechanism and an auxiliary assembly are arranged on the outer surface of the shell. According to the self-righting structure for the thermal recovery packer, the righting mechanism is arranged, and the righting sheets are made of alloy spring steel with good elasticity, so that the righting sheets are bent and deformed under the thrust of the sliding rod and can abut against the inner wall of an oil well, and the thermal recovery packer can be righting by external force during use; and the influence on thickened oil collection caused by reduction of the sealing effect due to inclination of the thermal recovery packer is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil extraction machinery technical field, concretely is a self-righting structure for thermal recovery packer. BACKGROUND

[0002] The thermal recovery packer works by the principle of metal thermal expansion, when steam injection, the temperature rises, the power piece (usually made of memory metal alloy) generates expansion force by heating, which acts on the sealing ring, making the sealing ring tightly combined with the casing wall, closing the oil jacket annular space, the traditional packer adopts the packer rubber tube that can be elastically deformed, realizes setting operation when being deformed under pressure, the new one-way anchoring type thermal recovery packer adopts the mode of hydraulic setting and pipe column unsealing, which is simple and compact in structure, convenient for processing and manufacturing and reducing cost, at the same time, the sealing cylinder adopts the integral structure, the manufacturing material has strong high temperature and high pressure resistance, which can meet the demand of plugging small diameter casing well.

[0003] According to the Chinese patent (CN217001774U), a kind of thermal recovery packer is disclosed, and the thermal recovery packer includes upper joint, center tube, lower joint, outer tube, lower joint and center tube form annular piston cavity, annular piston cavity is sealed and assembled with annular piston along up and down direction sliding, the pipe wall of center tube is equipped with the communication hole being communicated with annular piston cavity and being located at the lower of annular piston, annular piston is equipped with rubber tube outside, annular piston conical support section, conical support section can be inserted into rubber tube and make rubber tube radially expand setting;Locking buckle is arranged on the inner wall of annular piston, locking ring seat is correspondingly arranged on the outer wall of center tube, unsealing ring is installed on locking ring seat by second pin, locking ring seat has downward annular step, annular step and unsealing ring are spaced apart to form annular groove, open locking ring is sleeved in annular groove, when upper joint is lifted, second pin can be cut to make rubber tube retract unsealing, the utility model can realize the treatment of sealing oil well, but the utility model will appear inclination in use process, if thermal recovery packer lacks self-righting mechanism, this situation can lead to the weakening of sealing effect or even no sealing effect, and the workload of adjusting thermal recovery packer is large and the operation is not convenient, which will have great influence on the collection of heavy oil, reduce work efficiency, if thermal recovery packer is equipped with righting mechanism, it can be automatically righted when it is inclined, reduce the step of manual righting, improve oil extraction efficiency. UTILITY MODEL CONTENTS

[0004] (1) technical problems solved

[0005] In view of the deficiencies of the prior art, the utility model provides a self-righting structure for thermal recovery packer, which has the advantages of automatically righting the thermal recovery packer, and solves the problem of weakening of sealing effect caused by inclination of the thermal recovery packer in use.

[0006] (ii) Technical Solution

[0007] To achieve the above-mentioned purpose of facilitating the use of the user, the utility model provides the following technical scheme: A self-righting structure for thermal recovery packer, including the shell, the inside fixedly connected with the fixed plate of shell, the bottom wall between fixed plate and shell is connected with transmission rod through bearing, the upper end of transmission rod extends to the upside of fixed plate, the lower end of transmission rod extends to the downside of shell and is fixedly connected with rocking handle, rocking handle is located the outside of shell bottom, the outer surface of shell is provided with righting mechanism for righting thermal recovery packer when sealing oil well and auxiliary component for assisting righting mechanism,

[0008] The righting mechanism includes the lifting pipe fixedly connected to the left and right sides of the shell, the inside of the two lifting pipes is rotatably connected with a rotating rod through a bearing, the outer surface of the two rotating rods is rotatably connected with a sliding rod through a threaded connection, the outer surface of the two sliding rods is fixedly connected with a limiting block, the upper surface of the two lifting pipes is fixedly connected with a sliding chamber, the inside of the sliding chamber is provided with a sliding groove, the inside of the sliding groove is slidably connected with a sliding ring, the left and right sides of the lower surface of the sliding ring are fixedly connected with a spring, the upper end of the two sliding rods extends through the sliding chamber and is fixedly connected with the two springs through a connecting block, the upper surface of the sliding ring is fixedly connected with a righting piece, the upper surface of the righting piece is fixedly connected with a fixed ring, the outer surface of the transmission rod is fixedly connected with two pulleys, the two pulleys are located on the upper side of the fixed plate, and the two pulleys are rotatably connected with the two rotating rods through two belts.

[0009] Preferably, the sliding chamber is fixedly connected to the outer surface of the shell and has a circular cross-sectional shape.

[0010] Preferably, the number of righting pieces is ten, and the righting pieces are arranged in a circumferential array on the outside of the shell. The righting pieces are alloy spring steel righting pieces.

[0011] Preferably, the sliding ring vertically and linearly slides in the sliding groove.

[0012] Preferably, the fixed ring is fixedly connected to the outer surface of the shell.

[0013] Preferably, the auxiliary component includes a gas delivery tube fixedly connected to the left side wall of the shell. The outer surface of the shell is fixedly connected with a gas bag. The gas delivery tube and the gas bag are fixedly communicated.

[0014] Preferably, the gas bag is a ring-shaped gas bag and is located above the fixed ring.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the self-righting structure for the thermal recovery packer has the following beneficial effects:

[0017] 1、The self-righting structure for the thermal recovery packer, by setting the righting mechanism, using the alloy spring steel with good elasticity to make the righting piece, the bending deformation caused by the thrust of the slide rod can be resisted on the inner wall of the oil well, so that the thermal recovery packer can be righted by external force when in use, avoiding the inclination of the thermal recovery packer to cause the sealing effect to decline and affect the collection of heavy oil.

[0018] 2、The self-righting structure for the thermal recovery packer, by setting the auxiliary assembly, when the righting mechanism righting the thermal recovery packer, inflating the air bag in the auxiliary assembly so that the air bag also resists on the inner wall of the oil well, assisting the righting of the thermal recovery packer. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a front cross-section structure schematic view of the utility model;

[0020] Fig. 2 It is a front cross-section structure schematic view of the righting mechanism shown in the utility model.

[0021] Fig. 3 It is a front cross-section structure schematic view of the auxiliary assembly shown in the utility model.

[0022] In the drawing: 1 handle, 2 shell, 3 transmission rod, 4 fixed plate, 5 righting mechanism, 501 pulley, 502 lifting pipe, 503 rotating rod, 504 slide rod, 505 limit block, 506 sliding bin, 507 spring, 508 sliding ring, 509 sliding groove, 510 righting piece, 511 fixed ring, 6 auxiliary assembly, 601 gas pipe, 602 air bag. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model;

[0024] Please refer to Figs. 1-3 The utility model provides the following technical scheme:

[0025] The application discloses a self-righting structure for a thermal recovery packer, which comprises a shell 2, a fixed plate 4 fixedly connected to the inside of the shell 2, a transmission rod 3 rotatably connected between the fixed plate 4 and the bottom wall of the shell 2 through a bearing, the upper end of the transmission rod 3 extending through and extending to the upper side of the fixed plate 4, the lower end of the transmission rod 3 extending through and extending to the lower side of the shell 2 and being fixedly connected with a crank 1, the crank 1 being located outside the bottom of the shell 2, and a righting mechanism 5 and an auxiliary assembly 6 for assisting the righting mechanism 5 being arranged on the outer surface of the shell 2 and used for righting the thermal recovery packer when the thermal recovery packer is used to seal an oil well.

[0026] It should be noted that the thermal recovery packer is additionally provided with the righting mechanism 5, so that the thermal recovery packer can be automatically righted when the thermal recovery packer is used, thereby preventing the thermal recovery packer from being inclined when the thermal recovery packer is used, and affecting the oil production efficiency.

[0027] The righting mechanism 5 comprises two lifting pipes 502 fixedly connected to the left and right sides of the shell 2, two rotating rods 503 rotatably connected to the inside of the two lifting pipes 502 through bearings, two sliding rods 504 threadedly connected to the outer surfaces of the two rotating rods 503, two limiting blocks 505 fixedly connected to the outer surfaces of the two sliding rods 504, a sliding chamber 506 fixedly connected to the upper surfaces of the two lifting pipes 502, a sliding groove 509 formed in the inside of the sliding chamber 506, a sliding ring 508 slidably connected to the inside of the sliding groove 509, two springs 507 fixedly connected to the left and right sides of the lower surface of the sliding ring 508, the upper ends of the two sliding rods 504 extending through the sliding chamber 506 and being fixedly connected with the two springs 507 through connecting blocks, a righting sheet 510 fixedly connected to the upper surface of the sliding ring 508, a fixed ring 511 fixedly connected to the upper surface of the righting sheet 510, and two pulleys 501 fixedly connected to the outer surface of the transmission rod 3, the two pulleys 501 being located on the upper side of the fixed plate 4 and being rotatably connected with the two rotating rods 503 through two belts.

[0028] The sliding chamber is fixedly connected to the outer surface of the shell and has a ring-shaped cross section, the number of the righting sheets 510 is ten and the righting sheets 510 are circumferentially arranged on the outer side of the shell 2, the righting sheets 510 are alloy spring steel righting sheets, the sliding ring 508 vertically and linearly slides in the sliding groove 509, and the fixed ring 511 is fixedly connected to the outer surface of the shell 2.

[0029] It should be noted that the righting sheets 510 are made of alloy spring steel because the alloy spring steel has a high elastic limit, the steel material can bear a large elastic deformation without permanent deformation, and the characteristic ensures that the spring steel can maintain its function and shape in the process of repeated loading and unloading, and in order to ensure that the two sliding rods 504 on the two sides can realize synchronous rising, the thread directions on the rotating rods 503 on the two sides of the shell 2 should be kept consistent.

[0030] The auxiliary assembly 6 comprises a gas conveying pipe 601 fixedly connected to the left side wall of the shell 2, and a gas bag 602 fixedly connected to the outer surface of the shell 2 and in fixed communication with the gas conveying pipe 601.

[0031] The gas bag 602 is annular and located above the fixed ring 511.

[0032] It should be noted that the gas conveying pipe 601 is fixed to the left side wall of the shell 2 by a plurality of fixing blocks.

[0033] Working principle: after the thermal recovery packer is installed, the handle 1 is rotated to drive the two pulleys 501 to rotate through the transmission rod 3, the rotating rod 503 connected to the two pulleys 501 through the belt also rotates, the sliding rod 504 connected to the rotating rod 503 through the screw thread can only move up and down in the inside of the lifting pipe 502 due to the existence of the outer surface limiting block 505, at this time, the sliding rod 504 rises to compress the spring 507 and also pushes the sliding ring 508 to rise, since the upper surface of the righting plate 510 is fixedly connected with the fixed ring 511, it can only be bent and deformed to abut against the inner wall of the oil well to right the thermal recovery packer when it is subjected to the upward pushing force of the sliding ring 508 and the elastic force of the spring 507, at this time, since the spring 507 is compressed, the upward elastic force also presses the righting plate 510 so that the righting plate 510 cannot restore to the original state, then the gas is conveyed into the gas bag 602 through the gas conveying pipe 601 to make the gas bag 602 expand and abut against the inner wall of the oil well to right the thermal recovery packer, when the thermal recovery packer is not needed, the gas in the gas bag 602 is first discharged through the gas conveying pipe 601 to make the gas bag 602 shrink away from the inner wall of the oil well, then the handle 1 is reversely rotated to retract the sliding rod 504, the spring 507 restores to the original state and has no pressing effect on the righting plate 510, the righting plate 510 also restores to the original state and moves away from the inner wall of the oil well, and then the thermal recovery packer is removed, and the use is completed.

[0034] In summary, the thermal recovery packer with the self-righting structure is provided with the righting mechanism 5, the righting plate 510 is made of alloy spring steel with good elasticity, the bending deformation caused by the pushing force of the sliding rod 504 and the elastic force of the spring 507 can abut against the inner wall of the oil well, so that the thermal recovery packer can be righted by external force when it is used, and the inclination of the thermal recovery packer can be avoided to affect the sealing effect and the collection of heavy oil.

[0035] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0036] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application.

Claims

1. A self-righting structure for thermal recovery packers, comprising a housing (2), characterized in that: The inside of the shell (2) is fixedly connected with a fixed plate (4), a transmission rod (3) is rotatably connected between the fixed plate (4) and the bottom wall of the shell (2) through a bearing, the upper end of the transmission rod (3) extends through and to the upper side of the fixed plate (4), the lower end of the transmission rod (3) extends through and to the lower side of the shell (2) and is fixedly connected with a rocking handle (1), the rocking handle (1) is located outside the bottom of the shell (2), the outer surface of the shell (2) is provided with a righting mechanism (5) for righting the thermal production packer when sealing the oil well and an auxiliary assembly (6) for assisting the righting mechanism (5). The righting mechanism (5) comprises two lifting pipes (502) fixedly connected to the left and right sides of the shell (2), the inside of each lifting pipe (502) is rotatably connected with a rotating rod (503) through a bearing, the outer surface of each rotating rod (503) is threadedly connected with a sliding rod (504), the outer surface of each sliding rod (504) is fixedly connected with a limiting block (505), the upper surface of each lifting pipe (502) is fixedly connected with a same sliding bin (506), the inside of the sliding bin (506) is provided with a sliding groove (509), the inside of the sliding groove (509) is slidably connected with a sliding ring (508), the left and right sides of the lower surface of the sliding ring (508) are fixedly connected with a spring (507), the upper end of each sliding rod (504) extends through the sliding bin (506) and is fixedly connected with the spring (507) through a connecting block, the upper surface of the sliding ring (508) is fixedly connected with a righting piece (510), the upper surface of the righting piece (510) is fixedly connected with a fixed ring (511), the outer surface of the transmission rod (3) is fixedly connected with two pulleys (501), the two pulleys (501) are located on the upper side of the fixed plate (4), and the two pulleys (501) are rotatably connected with the two rotating rods (503) through two belts.

2. The self-centralizing structure for thermal production packers according to claim 1, characterized in that: The sliding bin (506) is fixedly connected to the outer surface of the shell (2) and has a ring-shaped cross section.

3. The self-centralizing structure for thermal production packer according to claim 1, characterized in that: The number of the righting pieces (510) is ten, and the righting pieces (510) are circumferentially arranged on the outer side of the shell (2), and the righting pieces (510) are alloy spring steel righting pieces.

4. The self-centralizing structure for thermal production packers according to claim 1, characterized in that: The sliding ring (508) vertically and linearly slides in the sliding groove (509).

5. The self-centralizing structure for thermal production packer according to claim 1, characterized in that: The fixed ring (511) is fixedly connected to the outer surface of the shell (2).

6. The self-centralizing structure for thermal production packer according to claim 1, characterized in that: The auxiliary assembly (6) comprises a gas conveying pipe (601) fixedly connected to the left side wall of the shell (2), the outer surface of the shell (2) is fixedly connected with a gas bag (602), and the gas conveying pipe (601) is fixedly communicated with the gas bag (602).

7. The self-centralizing structure for thermal production packer according to claim 6, characterized in that: The gas bag (602) is a ring-shaped gas bag and is located on the upper side of the fixed ring (511).

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