Oil well pipeline packer

Abstract

The present invention discloses a petroleum production oil well pipeline packer, and relates to the technical field of packers. The petroleum production oil well pipeline packer comprises a central tube and a conical barrel assembly and a slip seat sequentially arranged on the central tube, wherein a slip body is arranged on the side of the slip seat close to the conical barrel assembly; wherein the conical barrel assembly comprises: a straight barrel portion; a conical portion, wherein the conical portion is claw-shaped and evenly arranged at one end of the straight barrel portion close to the slip body, and an accommodation space one is reserved between two adjacent conical portions; and a pressure cone plate, wherein the pressure cone plate is located in the accommodation space one; the petroleum production oil well pipeline packer, by arranging a force-applying component on the slip seat, arranging a rotatable pressure cone plate on the conical barrel assembly, and arranging a force-bearing component on the pressure cone plate, enables the slip body to have two opening steps, so that the petroleum production oil well pipeline packer can be used for variable-diameter oil pipes.

Description

Technical Field

[0001] The invention relates to the technical field of packers, in particular to a packer for a pipeline of an oil well in petroleum production. Background Art

[0002] At present, the main exploitation methods for super-heavy oil reservoirs in oil fields are steam injection and steam drive. However, with the increase of exploitation time and the increase of injection rounds, casing deformation is becoming more and more serious. At the same time, due to long-term multi-round steam injection and other factors, some oil wells have casing damage and deformation, forming casing-changed wells, among which there are many casing shrinkage or flattening deformation wells. It can be seen that there are two conditions in the current casing-changed wells: one is that due to some reasons, the inner diameter of the casing at a certain place is larger than the normal inner diameter of the casing, and the other is that due to some reasons, the inner diameter of the casing at a certain place is smaller than the normal inner diameter of the casing.

[0003] As for casing-changed wells, after ordinary packers are lowered, they may not be able to be set or may be set loosely because the inner diameter of the casing at the setting position becomes larger. Alternatively, they may not be able to be lowered into the casing because the inner diameter of the casing becomes smaller. This results in ordinary packers being unable to be used in oil wells with reduced casing diameters, making it difficult to implement subsequent production-increasing measures for such oil wells, affecting the recovery rate of the oil wells and limiting the exploitation of such oil wells. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an oil well pipeline packer for petroleum production, which solves the problem that after the ordinary packer is lowered, it may not be able to be set or the setting is not firm because the inner diameter of the casing at the setting position becomes larger, or it may not be able to be lowered into the casing because the inner diameter of the casing becomes smaller.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a petroleum production oil well pipeline packer, including a center tube and a conical tube assembly and a slip seat arranged on the center tube in sequence, wherein the slip seat is provided with a slip body on the side close to the conical tube assembly; wherein the conical tube assembly includes: a straight tube portion; a conical portion, wherein the conical portion is claw-shaped and evenly arranged at one end of the straight tube portion close to the slip body, and an accommodating space one is reserved between two adjacent conical portions; a pressure cone plate, wherein the pressure cone plate is located in the accommodating space one, and the pressure cone plate It is used to open the cava body when it moves axially with the center tube and approaches the cava body; a revolving pair, which is used to connect the pressure cone plate and the conical part, so that the angle between the pressure cone plate and the conical part changes relatively; a force-bearing component, which is arranged on the pressure cone plate; a force-applying component, which is arranged on the cava seat, and when the conical cylinder assembly moves down synchronously with the center tube to the state close to the cava seat, the force-applying component can apply force to the force-bearing component, so that the angle of the pressure cone plate changes on the conical part along the revolving pair, forming a state of expansion of the pressure cone plate.

[0006] Furthermore, the force-bearing component includes a concave area, which is arranged at one end of the pressure cone plate away from the straight cylinder part, one side of the concave area is recessed in the outer surface of the pressure cone plate, and the other side of the concave area protrudes from the inner surface of the pressure cone plate; the concave area is an inclined structure with a lower end close to the center of the cone part and an upper end away from the center of the cone part; the force-applying component includes a pressure-bearing rod, and the inner wall of the cava seat is provided with an inner extension platform opposite to the concave area, and one end of the pressure-bearing rod is fixed on the inner extension platform; the rotating pair is located between the pressure cone plate and the side surface of the cone part, and when the conical cylinder assembly moves downward synchronously with the center tube, the pressure-bearing rod can enter and push the concave area, so that the pressure cone plate rotates along the rotating pair.

[0007] Furthermore, a blind hole 2 is provided on the side of the pressure cone plate close to the conical portion, and a blind hole 1 is provided on the side of the conical portion close to the pressure cone plate; the rotating pair includes: an assembly tube, which is provided with two groups and is respectively fixed in blind hole 1 and blind hole 2; a sphere, which is provided with two groups and is rotatably assembled in the two groups of assembly tubes; and a connecting rod, which is fixed between the two groups of spheres.

[0008] Furthermore, one end of the pressure bearing rod close to the concave area has a tapered end.

[0009] Furthermore, the rotating pair includes a central axis; the force-bearing component includes a pillow block and a gear, the pillow block is arranged in the middle of the inner surface of one end of the pressure cone plate close to the cava seat, the central axis is fixed to both ends of the pillow block, and the gear is fixed on the central axis; the force-applying component includes a gear column, and the inner wall of the cava seat is provided with an inner extension platform opposite to the gear, and one end of the gear column is fixed on the inner extension platform; when the conical cylinder assembly moves downward synchronously with the center tube, the gear can pass through the gear column and rotate, so that the gear drives the cone part to rotate through the central axis and the pillow block.

[0010] Furthermore, one end of the central shaft away from the pillow block is rotatably mounted on the tapered portion via a bearing, and the central shaft is axially limited to a side surface of the tapered portion.

[0011] Furthermore, a compensation slope is provided on the inner wall of the pressure cone plate close to the straight cylinder portion, the side of the compensation slope close to the center of the pressure cone plate is the bottom of the slope, and the side away from the center of the circle is the top of the slope, so as to compensate for the obstruction of the straight cylinder portion to the pressure cone plate when the pressure cone plate rotates along the rotating pair.

[0012] Furthermore, a limiting arc is provided at the top of the slope, and a limiting notch adapted to the limiting arc is provided on the side of the straight cylinder portion close to the accommodating space 1, which is used to limit the side of the pressure cone plate close to the straight cylinder portion to rotate along the rotating pair toward the side close to the center of the pressure cone plate.

[0013] Furthermore, two side surfaces of the pressure cone plate close to the conical portion are parallel to each other, so as to prevent the conical portion from blocking the pressure cone plate from rotating along the revolving pair.

[0014] Furthermore, a rubber cylinder and a pressure seat are sequentially provided on the side of the conical cylinder assembly away from the slip body, and a centralizer is provided on the side of the slip seat away from the slip body.

[0015] The present invention has the following beneficial effects:

[0016] The oil well pipeline packer for oil production is provided with a force-applying component on the slip seat, a rotatable pressure cone plate on the conical barrel assembly, and a force-bearing component on the pressure cone plate, so that the slip body has two opening steps. The first step is to open the slip body once in the inherent state of the conical barrel assembly. When the opening degree does not reach the inner diameter of the oil well, the conical barrel assembly continues to move, so that the force-bearing component and the force-applying component can contact each other and form a force, so as to achieve the purpose of changing the angle of the pressure cone plate, so that the pressure cone plate can expand the slip body for a second time, so that the oil well can be opened. The oil production well pipeline packer can be used for well pipes with larger diameters. In addition, since the packer provided by the present invention can subsequently expand the cava body for a second time by opening the pressure cone plate, the outer diameter of the packer in this embodiment can be smaller than the outer diameter of the existing ordinary packer, while the expansion degree of the cava body (also known as the expansion rate) can be equal to or even higher than the expansion degree of the cava body in the ordinary packer. Therefore, the outer diameter of the packer provided by this embodiment can be smaller, and thus it can smoothly pass through the well section with a smaller diameter of the casing change well and reach the construction position.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall diagram of the first embodiment of the present invention;

[0019] Figure 2 It is a position diagram of a single slip body in the first embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the conical barrel assembly in the first embodiment of the present invention;

[0021] Figure 4 For the present invention Figure 3 Exploded diagram of

[0022] Figure 5 This is a bottom view of the straight tube portion and the tapered portion in the first embodiment of the present invention;

[0023] Figure 6 This is a schematic structural diagram of a pressure cone plate in Embodiment 1 of the present invention;

[0024] Figure 7 It is an assembly diagram of the revolving pair in the first embodiment of the present invention;

[0025] Figure 8 This is a state diagram of the conical cylinder assembly reaching the pressure-bearing rod in the first embodiment of the present invention;

[0026] Fig. 9 It is a schematic diagram of the pressure-bearing rod pushing the pressure cone plate in the first embodiment of the present invention;

[0027] Fig.10 Schematic diagram of the arrangement of the conical portion and the pressure cone plate in the first embodiment of the present invention;

[0028] Fig.11 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0029] Fig.12 This is a schematic diagram of the position of the tooth column in the second embodiment of the present invention;

[0030] Fig.13 It is a structural schematic diagram of the slip seat in the second embodiment of the present invention;

[0031] Fig.14 This is a top view of the tapered barrel assembly in the second embodiment of the present invention;

[0032] Fig.15 This is a bottom perspective view of the tapered barrel assembly in the second embodiment of the present invention;

[0033] Fig.16 Schematic diagram of the position of gears in the second embodiment of the present invention.

[0034] In the figure, 1. conical cylinder assembly; 11. straight cylinder portion; 111. limiting notch; 12. conical portion; 121. blind hole 1; 122. guide slope 1; 13. accommodating space 1; 14. pressure cone plate; 141. concave area; 142. blind hole 2; 143. limiting arc; 144. compensation slope; 145. pillow block; 146. gear; 15. revolving pair; 151. connecting rod; 152. sphere; 153. assembly cylinder; 154. center axis; 2. center tube; 3. cava body; 31. guide slope 2; 4. cava seat; 41. accommodating space 2; 42. inner extension platform; 5. centralizer; 6. pressure rod; 7. tooth column; 8. pressure seat; 9. rubber cylinder. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] According to the following Figure 1-Figure 16 The oil well pipeline packer for oil production provided by an embodiment of the present invention is described.

[0038] Embodiment 1

[0039] For this example, please refer to Figure 1-10 .

[0040] See also Figure 1 An embodiment of the present invention provides a petroleum production oil well pipeline packer, including a center pipe 2 and a pressure seat 8, a rubber cylinder 9, a tapered cylinder assembly 1, a slip seat 4, a slip body 3 and a centralizer 5 arranged on the center pipe 2 in sequence. The pressure seat 8, the rubber cylinder 9 and the centralizer 5 are all well-known technologies and will not be described in detail here.

[0041] The focus of the present invention is to enable the conical barrel assembly 1 to continuously expand its own conical inclination angle during the setting process, thereby expanding its ability to expand the slip body 3.

[0042] Combination Figure 2-Figure 5 As shown, the tapered cylinder assembly 1 includes a straight cylinder portion 11 , a tapered portion 12 , a pressure cone plate 14 and a rotating pair 15 .

[0043] Among them, the conical part 12 is evenly arranged in a claw shape at one end of the straight tube part 11 close to the cava body 3, and an accommodating space 13 is reserved between two adjacent conical parts 12. The pressure cone plate 14 is located in the accommodating space 13. During the sealing process of the present packer, the pressure cone plate 14 will move along the axial direction with the center pipe 2 and gradually approach the cava body 3. At this time, the pressure cone plate 14 can open the cava body 3, so that the cava body 3 fits against the inner wall of the oil pipe, thereby realizing the sealing of the present packer.

[0044] Preferably, the outer surface of the slip body 3 is provided with anti-skid teeth to increase the friction between the slip body 3 and the inner wall of the well pipe, so as to avoid slipping between the slip body 3 and the inside of the well pipe after the sealing is completed.

[0045] Preferably, a guide slope 122 is provided on both sides of the conical portion 12 near the outer arc surface, and a guide slope 31 is provided on both sides of the cava body 3 near the inner surface. The guide slope 122 is adapted to the guide slope 31, and can guide the cava body 3 when the pressure cone plate 14 pushes the cava body 3, thereby avoiding position deviation of the cava body 3 on the outer peripheral surface of the entire conical cylinder assembly 1.

[0046] Preferably, the cava body 3 is slidably assembled on the cava seat 4, and an accommodating space 41 for assembling the cava body 3 is opened at one end of the cava seat 4 close to the conical barrel assembly 1, so that the cava body 3 is circumferentially limited in the accommodating space 41, and the cava body 3 slides radially along the center tube 2 in the accommodating space 41.

[0047] In addition, it should be noted that a limit hook should be provided at one end of the slip body 3 close to the slip seat 4, and when the slip body 3 slides radially outward, the limit hook can limit the slip body 3 from leaving the accommodating space 41.

[0048] Due to various factors, the casing is deformed and the inner diameter of the casing at a certain point is larger than the normal inner diameter of the casing, so a rotating pair 15 is provided here, and the rotating pair 15 is used to connect the pressure cone plate 14 and the conical portion 12, so that the pressure cone plate 14 can be rotated on the conical portion 12 along the rotating pair 15 at a certain angle, so that the angle of the pressure cone plate 14 can be relatively changed, and the angle change can expand the support range of the cava body 3.

[0049] When the conical barrel assembly 1 gradually approaches the cava body 3, the conical barrel assembly 1 opens the cava body 3 once. In order to achieve that the pressure cone plate 14 of the conical barrel assembly 1 can adjust its own angle to open the cava body 3 for a second time when the conical barrel assembly 1 is in a continuous moving state, a force-bearing component and a force-applying component are also provided here. The force-bearing component is arranged on the pressure cone plate 14 and can move synchronously with the pressure cone plate 14, while the force-applying component is arranged on the cava seat 4. When the conical barrel assembly 1 moves down synchronously with the center tube 2 to be close to the cava seat 4, the force-applying component can contact and apply force to the force-bearing component, so that the pressure cone plate 14 changes its angle on the conical portion 12 along the rotating pair 15, forming a state of expansion of the pressure cone plate 14. When the pressure cone plate 14 expands, it can expand the cava body 3 for a second time.

[0050] Therefore, the oil well pipeline packer provided in the embodiment of the present invention can make the slip body 3 have two opening steps. The first step is to expand the slip body 3 once in the inherent state of the conical cylinder assembly 1. When the expansion degree does not reach the inner diameter of the oil well, the conical cylinder assembly 1 continues to move, so that the force-bearing component and the force-applying component can contact each other and form a force, so as to achieve the purpose of changing the angle of the pressure cone plate 14, so that the pressure cone plate 14 can expand the slip body 3 for a second time, so that the oil well pipeline packer can be used for well pipes with larger diameters; in addition, since the packer provided by the present invention can subsequently expand the slip body 3 for a second time by opening the pressure cone plate 14, the outer diameter of the packer in this embodiment can be smaller than the outer diameter of the existing ordinary packer, while the expansion degree (also referred to as the expansion rate) of the slip body 3 can be equal to or even higher than the expansion degree of the slip body 3 in the ordinary packer, so the outer diameter of the packer provided in this embodiment can be smaller, and thus it can smoothly pass through the well section with a smaller diameter of the casing change well to reach the construction position.

[0051] Optionally, the number of the tapered portions 12 may be 3, 4, 5 or 6, and the number of the pressure cone plates 14 matches the number of the tapered portions 12 .

[0052] Preferably, Figure 2 In the perspective shown, the upper end of the tapered portion 12 is an end with a larger diameter, and the lower end of the tapered portion 12 is an end with a smaller diameter.

[0053] Preferably, the tapered portion 12 and the straight cylindrical portion 11 are an integral structure.

[0054] It should be noted that in actual production, the larger the axial length of the entire conical cylinder assembly 1, the larger the axial length of the pressure cone plate 14, the greater its expansion amount after rotating along the rotating pair 15, and the greater its expansion capacity for the cava body 3.

[0055] Combination Figure 4 , Figure 6 and Figure 7 As shown, specifically, the force-bearing component mentioned above includes a concave area 141, which is substantially an arc-shaped structure integrally formed with the pressure cone plate 14, and is arranged at one end of the pressure cone plate 14 away from the straight cylinder portion 11, referring to Figure 4 From the perspective shown, the concave area 141 is located on the inner side of the lower end of the pressure cone plate 14, one side of which is recessed in the outer surface of the pressure cone plate 14 and the other side protrudes from the inner surface of the pressure cone plate 14, and the concave area 141 is an inclined structure with the lower end close to the center of the cone portion 12 and the upper end away from the center of the cone portion 12; the force-applying component includes a pressure-bearing rod 6, and the inner wall of the cava seat 4 is provided with an inner extension platform 42 opposite to the concave area 141, and one end of the pressure-bearing rod 6 is fixed on the inner extension platform 42.

[0056] In this embodiment, when the conical cylinder assembly 1 continues to approach and open the slip body 3, the pressure rod 6 will gradually enter the concave area 141 (such as Figure 8 ), and applies thrust to the concave area 141, so that the thrust borne by the concave area 141 can make the entire pressure cone plate 14 rotate along the rotating pair 15. During the rotation, the lower end of the pressure cone plate 14 gradually approaches its center, and the upper end of the pressure cone plate 14 gradually moves away from its center, and the opening angle of the pressure cone plate 14 increases (such as Fig. 9 ), so that the pressure cone plate 14 at this time can further expand the cava body 3 for a second time.

[0057] Preferably, the pressure-bearing rod 6 can be substantially replaced by a structure of a different shape, as long as it can enter the concave area 141 to apply force to the concave area 141 , for example, it can be replaced by a plate structure or a polygonal rod.

[0058] Furthermore, one end of the pressure-bearing rod 6 close to the concave area 141 has a tapered end, thereby preventing the pressure-bearing rod 6 from being stuck when initially entering the concave area 141 , thereby improving the fit between the pressure-bearing rod 6 and the concave area 141 .

[0059] In addition, the revolving pair 15 is located between the pressure cone plate 14 and the side surface of the conical portion 12, referring to Figure 4 In order to ensure that the concave area 141 has a certain length in the vertical direction to allow the pressure-bearing rod 6 to slide a certain distance, the rotation pair 15 is arranged at the center position of the side of the pressure cone plate 14 (such as Figure 7 ), this position setting can ensure that the concave area 141 has a certain length in the vertical direction.

[0060] Due to the arc-shaped cross-section structure of the entire pressure cone plate 14, if the axial rotation is simply set along the tangential directions of the two sides of the pressure cone plate 14, the pressure cone plate 14 will be stuck during rotation. Therefore, this embodiment provides a rotation pair 15 that will not stick the pressure cone plate 14, specifically as follows: the side of the pressure cone plate 14 close to the conical portion 12 is provided with a second blind hole 142, and the side of the conical portion 12 close to the pressure cone plate 14 is provided with a first blind hole 121. The rotation pair 15 includes: an assembly cylinder 153, which has two groups and is respectively fixed in the first blind hole 121 and the second blind hole 142; a ball 152, which has two groups and is respectively rotatably assembled in the two groups of assembly cylinders 153; and a connecting rod 151, which is fixed between the two groups of balls 152. Due to the universal rotation of the two groups of balls 152, the pressure cone plate 14 can be prevented from getting stuck during rotation.

[0061] Combination Figure 4 and Figure 6As shown, when the pressure cone plate 14 rotates along the rotating pair 15, the inner edge of its upper end will actually be unable to rotate due to the blocking effect of the straight cylinder portion 11. In order to solve this problem, a compensation slope 144 is provided on the inner wall of the pressure cone plate 14 close to the straight cylinder portion 11. The side of the compensation slope 144 close to the center of the pressure cone plate 14 is the bottom of the slope, and the side away from the center is the top of the slope. The arc diameter of the top of the slope is greater than the arc diameter of the bottom of the slope. Therefore, since the inner side of the upper end of the pressure cone plate 14 has no edges but a slope surface, during the rotation of the pressure cone plate 14 along the rotating pair 15, the compensation slope 144 can compensate for the blocking of the straight cylinder portion 11 to the pressure cone plate 14, thereby ensuring that the pressure cone plate 14 can rotate.

[0062] like Figure 3-Figure 6 As shown, in order to ensure that the initial state of the pressure cone plate 14 is Figure 3 The state shown in the figure prevents the lower end from warping outward and the upper end from warping inward (this is because once such a state occurs, the concave area 141 will pass over the pressure-bearing rod 6 and be located on the outside of the pressure-bearing rod 6, resulting in the pressure-bearing rod 6 being unable to enter the concave area 141 during the sealing stage). A limiting arc 143 is provided at the top of the slope, and a limiting notch 111 adapted to the limiting arc 143 is provided on the side of the straight cylinder portion 11 close to the accommodating space 13. Therefore, even if the upper side of the pressure cone plate 14 is subjected to a centripetal thrust, the limiting arc 143 is limited by the limiting notch 111, and the upper side of the pressure cone plate 14 will not rotate along the rotating pair 15 to the side close to the center of the pressure cone plate 14, that is, the state of the lower end warping outward and the upper end warping inward will not occur, thereby ensuring that the pressure-bearing rod 6 can enter the concave area 141 during the later sealing.

[0063] like Fig.10 Preferably, in order to prevent the two narrow sides of the conical portion 12 from blocking the pressure cone plate 14 from rotating along the rotating pair 15, the two narrow sides of the pressure cone plate 14 close to the conical portion 12 are set as parallel sides. Therefore, since its inner arc and outer arc are on the same straight plane, the conical portion 12 will not block the rotation of the pressure cone plate 14, thereby ensuring the smooth rotation of the conical portion 12.

[0064] When in use, after the previous work is completed, it is necessary to carry out the stage of opening and sealing the main body 3 of the slip, by applying pressure to the central tube 2, so that the pressure seat 8, the rubber cylinder 9 and the conical cylinder assembly 1 move together with the central tube 2, and as the conical cylinder assembly 1 gradually approaches the slip seat 4, the pressure cone plate 14 thereon can directly and gradually squeeze the main body 3 of the slip, so that the main body 3 of the slip is opened, and when the pressure cone plate 14 opens the main body 3 of the slip in a natural form, the main body 3 of the slip still cannot be sealed, and the pressure on the central tube 2 is continuously applied, so that the conical cylinder assembly 1 can continue to approach the bearing The pressure rod 6 is pressed, thereby causing the pressure rod 6 to enter the concave area 141, and by pushing the concave area 141, the pressure cone plate 14 is rotated along the rotating pair 15, and the upper end of the pressure cone plate 14 can rotate outward, thereby realizing further expansion of the pressure cone plate 14, and its expansion can expand the cava body 3 again, so that the cava body 3 can adapt to the well pipe with an increased diameter. During the opening process of the cava body 3, the outer surface can be stuck to the inner wall of the well pipe, so as the center pipe 2 continues to move, the pressure seat 8 can apply pressure to the rubber tube 9, so that the rubber tube 9 can achieve sealing.

[0065] Embodiment 2

[0066] This embodiment refers to Figure 11-Figure 16 .

[0067] The rotating pair 15 here includes a central axis 154, and the force-bearing components include a pillow block 145 and a gear 146. The pillow block 145 is arranged in the middle of the inner surface of one end of the pressure cone plate 14 close to the cava seat 4, the central axis 154 is fixed at both ends of the pillow block 145, and the gear 146 is fixed on the central axis 154. Therefore, in this embodiment, when the gear 146 rotates, the central axis 154 can rotate together with the gear 146. The force-applying component here includes a gear column 7, and the inner wall of the cava seat 4 is provided with an inner extension platform 42 opposite to the gear 146, and one end of the gear column 7 is fixed on the inner extension platform 42.

[0068] In this embodiment, during the sealing stage, by applying pressure to the center pipe 2, the conical tube assembly 1 moves synchronously with the center pipe 2 and gradually approaches the cava body 3 and the cava seat 4, and the pressure cone plate 14 thereon can first open the cava body 3 once. If the sealing still cannot be achieved, the center pipe 2 is continuously pressed, and the conical tube assembly 1 continues to approach the cava seat 4, and then the gear 146 reaches the position of the tooth column 7, so that the gear 146 can rotate due to the action of the tooth column 7. The gear 146 in the self-rotating state can drive the upper end of the pressure cone plate 14 to rotate outward through the central shaft 154 and the pillow block 145, and then the opening angle of the pressure cone plate 14 is further expanded, so that the pressure cone plate 14 can expand the cava body 3 for a second time to adapt to the well pipe with an increased diameter.

[0069] Therefore, the oil well pipeline sealer provided in the embodiment of the present invention can make the cava body 3 have two opening steps. The first step is to open the cava body 3 once in the inherent state of the conical cylinder assembly 1, and the second step is to expand the pressure cone plate 14 to perform a second opening of the cava body 3, so that the oil well pipeline sealer can be used for variable diameter oil pipes; in addition, compared with the first embodiment, since its rotating pair 15 is located at the bottom of the pressure cone plate 14, the angle of expansion is larger, and it can adapt to oil wells with larger well pipe diameters.

[0070] Preferably, in order to install the central axis 154, an inward protrusion is provided on the inner wall of the conical portion 12, and the protrusion length should be able to reach the position of the central axis 154. The end of the central axis 154 away from the pillow block 145 is rotatably installed on the conical portion 12 through a bearing, and the central axis 154 is axially limited to the protrusion on the side of the conical portion 12.

[0071] When in use, after the previous work is completed, it is necessary to carry out the stage of opening and sealing the main body 3 of the slip, by applying pressure to the center tube 2, so that the pressure seat 8, the rubber cylinder 9 and the conical cylinder assembly 1 move together with the center tube 2, and as the conical cylinder assembly 1 gradually approaches the slip seat 4, the pressure cone plate 14 thereon can directly and gradually squeeze the main body 3 of the slip, so that the main body 3 of the slip is opened, and when the pressure cone plate 14 opens the main body 3 of the slip in a natural form, the main body 3 of the slip still cannot be sealed, and then the pressure on the center tube 2 is continuously applied, so that the gear 146 on the conical cylinder assembly 1 can reach the position of the tooth column 7 , so that the gear 146 can rotate due to the action of the tooth column 7, and the rotating gear 146 can drive the upper end of the pressure cone plate 14 to rotate outward through the central axis 154 and the pillow block 145, and then the opening angle of the pressure cone plate 14 is further expanded, so that the pressure cone plate 14 can perform secondary expansion on the cava body 3, so that the cava body 3 can adapt to the well pipe with an increased diameter. During the opening process of the cava body 3, the outer surface can be stuck to the inner wall of the well pipe, so as the center pipe 2 continues to move, the pressure seat 8 can pressurize the rubber tube 9, so that the rubber tube 9 can be sealed.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Oil well pipeline packer for petroleum production, characterized in that: It comprises a central tube (2), and a conical tube assembly (1) and a slip seat (4) which are sequentially arranged on the central tube (2), wherein a slip body (3) is arranged on a side of the slip seat (4) close to the conical tube assembly (1); Wherein, the conical barrel assembly (1) comprises: Straight tube (11); A conical portion (12), the conical portion (12) being claw-shaped and evenly arranged at one end of the straight cylindrical portion (11) close to the slip body (3), with an accommodation space (13) reserved between two adjacent conical portions (12); A pressure cone plate (14), wherein the pressure cone plate (14) is located in the first accommodating space (13), and when the pressure cone plate (14) moves axially with the central tube (2) and approaches the slip body (3), it is used to prop open the slip body (3); A revolving pair (15), the revolving pair (15) being used to connect the pressure cone plate (14) and the conical portion (12) so that the angles of the pressure cone plate (14) and the conical portion (12) can be changed relative to each other; A force-bearing component, wherein the force-bearing component is arranged on the pressure cone plate (14); a force-applying component, the force-applying component being arranged on the slip seat (4), and when the conical cylinder assembly (1) moves downward synchronously with the central tube (2) to a state close to the slip seat (4), the force-applying component can apply force to the force-receiving component, so that the pressure cone plate (14) changes its angle along the rotating pair (15) on the conical portion (12), thereby forming a state in which the pressure cone plate (14) is expanded; the force-receiving component comprises a concave area (141), the concave area (141) being arranged at one end of the pressure cone plate (14) away from the straight cylinder portion (11), one side of the concave area (141) being recessed in the outer surface of the pressure cone plate (14), and the other side of the concave area (141) being protruding from the inner surface of the pressure cone plate (14); The concave area (141) is an inclined structure with a lower end close to the center of the conical portion (12) and an upper end away from the center of the conical portion (12); The force-applying component comprises a pressure-bearing rod (6); the inner wall of the slip seat (4) is provided with an inner extension platform (42) opposite to the concave area (141); one end of the pressure-bearing rod (6) is fixed on the inner extension platform (42); The revolving pair (15) is located between the pressure cone plate (14) and the side surface of the conical portion (12). When the conical cylinder assembly (1) moves downward synchronously with the center tube (2), the pressure-bearing rod (6) can enter and push the concave area (141), so that the pressure cone plate (14) rotates along the revolving pair (15).

2. The oil well pipeline packer for petroleum production according to claim 1, characterized in that: A second blind hole (142) is provided on the side of the pressure cone plate (14) close to the cone portion (12), and a first blind hole (121) is provided on the side of the cone portion (12) close to the pressure cone plate (14); The revolving pair (15) comprises: An assembly tube (153), wherein the assembly tube (153) is provided with two groups, which are respectively fixed in the first blind hole (121) and the second blind hole (142); The spheres (152) are provided in two groups and are respectively rotatably assembled in two groups of assembly cylinders (153); A connecting rod (151), wherein the connecting rod (151) is fixed between the two groups of balls (152).

3. The oil well pipeline packer for petroleum production according to claim 2, characterized in that: One end of the pressure-bearing rod (6) close to the concave area (141) has a tapered end.

4. The oil well pipeline packer for petroleum production according to any one of claims 1 to 3, characterized in that: A compensating slope (144) is provided on the inner wall of the side of the pressure cone plate (14) close to the straight tube portion (11), wherein the side of the compensating slope (144) close to the center of the pressure cone plate (14) is the bottom of the slope, and the side away from the center of the slope is the top of the slope, so as to compensate for the obstruction of the straight tube portion (11) to the pressure cone plate (14) when the pressure cone plate (14) rotates along the rotating pair (15).

5. The oil well pipeline packer for petroleum production according to claim 4, characterized in that: A limiting arc (143) is provided at the top of the slope, and a limiting notch (111) adapted to the limiting arc (143) is provided on a side of the straight tube portion (11) close to the accommodating space (13), for limiting the side of the pressure cone plate (14) close to the straight tube portion (11) from rotating along the rotating pair (15) toward a side close to the center of the pressure cone plate (14).

6. The oil well pipeline packer for petroleum production according to claim 5, characterized in that: The two side surfaces of the pressure cone plate (14) close to the conical portion (12) are parallel to each other, so as to prevent the conical portion (12) from blocking the pressure cone plate (14) from rotating along the rotating pair (15).

7. The oil well pipeline packer for petroleum production according to claim 6, characterized in that: The conical cylinder assembly (1) is provided with a rubber cylinder (9) and a pressure seat (8) in sequence on the side away from the slip body (3), and the slip seat (4) is provided with a centralizer (5) on the side away from the slip body (3).

8. Oil well pipeline packer for petroleum production, characterized by: It comprises a central tube (2), and a conical tube assembly (1) and a slip seat (4) which are sequentially arranged on the central tube (2), wherein a slip body (3) is arranged on a side of the slip seat (4) close to the conical tube assembly (1); Wherein, the conical barrel assembly (1) comprises: Straight tube (11); A conical portion (12), the conical portion (12) being claw-shaped and evenly arranged at one end of the straight cylindrical portion (11) close to the slip body (3), with an accommodation space (13) reserved between two adjacent conical portions (12); A pressure cone plate (14), wherein the pressure cone plate (14) is located in the first accommodating space (13), and when the pressure cone plate (14) moves axially with the central tube (2) and approaches the slip body (3), it is used to prop open the slip body (3); A revolving pair (15), the revolving pair (15) being used to connect the pressure cone plate (14) and the conical portion (12) so that the angles of the pressure cone plate (14) and the conical portion (12) can be changed relative to each other; A force-bearing component, wherein the force-bearing component is arranged on the pressure cone plate (14); a force-applying component, the force-applying component being arranged on the slip seat (4), and when the conical cylinder assembly (1) moves downward synchronously with the central tube (2) to a state close to the slip seat (4), the force-applying component can apply force to the force-receiving component, so that the pressure cone plate (14) changes its angle on the conical portion (12) along the rotating pair (15), thereby forming a state in which the pressure cone plate (14) is expanded; The revolving pair (15) comprises a central axis (154); The force-bearing component comprises a pillow block (145) and a gear (146); the pillow block (145) is arranged at the middle of the inner surface of one end of the pressure cone plate (14) close to the slip seat (4); the central shaft (154) is fixed to both ends of the pillow block (145); and the gear (146) is fixed on the central shaft (154); The force-applying component comprises a tooth column (7); an inner wall of the slip seat (4) is provided with an inner extension platform (42) opposite to the gear (146); one end of the tooth column (7) is fixed on the inner extension platform (42); When the conical cylinder assembly (1) moves downward synchronously with the central tube (2), the gear (146) can pass through the tooth column (7) and rotate, so that the gear (146) drives the conical portion (12) to rotate through the central shaft (154) and the pillow block (145).

9. The oil well pipeline packer for petroleum production according to claim 8, characterized in that: One end of the central shaft (154) away from the pillow block (145) is rotatably mounted on the tapered portion (12) via a bearing, and the central shaft (154) is axially limited to a side surface of the tapered portion (12).

10. The oil well pipeline packer for petroleum production according to claim 8 or 9, characterized in that: A compensating slope (144) is provided on the inner wall of the side of the pressure cone plate (14) close to the straight tube portion (11), wherein the side of the compensating slope (144) close to the center of the pressure cone plate (14) is the bottom of the slope, and the side away from the center of the slope is the top of the slope, so as to compensate for the obstruction of the straight tube portion (11) to the pressure cone plate (14) when the pressure cone plate (14) rotates along the rotating pair (15).

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