A large-diameter packer capable of hanging a screen pipe

Abstract

The present invention discloses a large-diameter packer capable of hanging a screen pipe, which includes a connecting pipe. An anchor is fixedly connected to the outer wall of the connecting pipe. The anchor is in the shape of a convex cylindrical. A packer body is movably inserted into the inner wall of the connecting pipe. An electric push rod is fixedly connected to the outer wall at the top of one side of the anchor. A groove is formed in the top of the anchor. A fixing structure is fixedly connected to the inner walls of the four grooves. The fixing structure includes a clamping jaw and a support rod. When the clamping jaw is perpendicular to the anchor at 90 degrees, one side of the clamping jaw can be inserted into the inside of a cavity one on the packer body, thereby fixing the packer body. By inserting the clamping jaw into the inside of the cavity one, the fixation of the clamping jaw on the packer body can be increased, avoiding that the clamping jaw is only fixed on the outer wall of the packer body, which easily causes the packer body to loosen from the connecting pipe. Correspondingly, the fixation of the packer body is increased, thereby improving the working efficiency of the packer body.

Description

Technical Field

[0001] The invention belongs to the technical field of oil equipment, and particularly relates to a large-diameter packer capable of hanging a screen pipe. Background Art

[0002] In the current technical field of oil drilling and completion, as the length of the well section in oil and gas fields continues to increase and the working conditions become more and more complex, it is required to be able to hang longer pipe strings into the well and have reliable sealing performance. This requires the hanging capacity of the packer suspension device to be stronger and stronger.

[0003] However, the following problems still exist when the traditional device is used:

[0004] For the existing large-diameter packer capable of hanging a screen pipe, although the setting of the clamping jaws is convenient for the installation of the packer, the clamping jaws at the connection are prone to wear after long-term use, resulting in the loosening of the clamping jaws and affecting the fixation of the packer.

[0005] Therefore, we need a large-diameter packer capable of hanging a screen pipe to solve the problem that the existing clamping jaws become loose after long-term use and can increase the fixation of the clamping jaws. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the invention is to provide a large-diameter packer capable of hanging a screen pipe, which has the advantage of increasing the fixation of the clamping jaws.

[0007] To achieve the above purpose, the invention provides the following technical solutions: It includes a connecting pipe, the outer wall of the connecting pipe is fixedly connected with a setting packer, the shape of the setting packer is a convex cylindrical shape, the inner wall of the connecting pipe is movably inserted with a packer body, the outer wall of the top of one side of the setting packer is fixedly connected with an electric push rod, a groove is opened at the top of the setting packer, and a fixing structure is fixedly connected to the inner walls of the four grooves. The fixing structure includes clamping jaws and support rods. The outer walls of both ends of the four support rods are fixedly connected with the inner walls of the grooves, and the outer walls of the four support rods are rotationally connected with the inner walls of the clamping jaws.

[0008] Preferably, the output ends of the four electric push rods are fixedly connected with an installation ring, the outer wall of the installation ring is hollowed out, the inner wall of the installation ring is slidably connected with the outer wall of the setting packer, an installation shell is fixedly connected to the upper part of the outer wall of the installation ring, and a through hole with the inner and outer walls connected on both sides is opened on the outer wall of the installation ring on one side of the installation shell.

[0009] Preferably, the outer walls of the four jaws are movably lapped with the inner wall of the mounting ring. The four jaws are L-shaped. A pushing spring is fixedly connected to the outer wall of one side of the four jaws. One end of the pushing spring is fixedly connected to the outer wall of the connecting pipe. The side of the connecting pipe where the pushing spring is located is flat-cut. Fixing holes are formed in the outer wall of one side of the four jaws, and the bottoms of the four fixing holes are inclined planes.

[0010] Preferably, fixing rods are slidably connected inside the four mounting shells. Connecting plates are fixedly connected to the outer walls on both sides of the four fixing rods. A reset spring is fixedly connected to the outer wall of one side of the connecting plate. One end of the two reset springs is fixedly connected to the inner wall of the mounting shell. The outer wall of the fixing rod penetrates through the inner wall of the mounting shell and is slidably connected with the through hole on the mounting ring.

[0011] Preferably, fixing heads are fixedly connected to the outer walls of one ends of the four fixing rods. The outer walls of the four fixing heads are movably inserted into the inner walls of the fixing holes. One ends of the four fixing heads are obliquely cut up and down, and one ends of the four fixing heads close to the fixing rods are obliquely cut left and right.

[0012] Preferably, slot holes are formed in the outer walls of one sides of the four fixing heads close to the fixing rods. Rollers are rotatably connected to the inner walls of the slot holes. Roller groups are rotatably connected to one ends of the four fixing heads. The outer walls of the roller groups are rotatably connected to the outer walls of one sides of the jaws.

[0013] Preferably, cavity two is formed on both sides of the fixing hole. A rubber block is fixedly connected to the inner wall of the cavity two. The inside of the rubber block is hollow. A limiting block is fixedly connected to one side of the rubber block. The outer wall of the limiting block is slidably connected with the inner wall of the cavity two.

[0014] Preferably, one sides of the two limiting blocks are inclined planes. The outer walls of the two rollers are rotatably connected to the outer walls of the other sides of the limiting blocks. The outer walls between the two limiting blocks are movably lapped with the outer wall of the fixing rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] When the jaws are perpendicular to the setting by 90 degrees, one side of the jaws can be inserted into the inside of cavity one on the packer body, so as to fix the packer body. By inserting the jaws into the inside of cavity one, the fixing of the jaws on the packer body can be increased, avoiding that the jaws are only fixed on the outer wall of the packer body, which easily causes the packer body and the connecting pipe to become loose. Correspondingly, the fixing of the packer body is increased, thereby improving the working efficiency of the packer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present invention;

[0018] Figure 2 Schematic top view structure diagram of the present invention;

[0019] Figure 3 Schematic cross-sectional view structure diagram of the present invention;

[0020] Figure 4 Of the present invention Figure 3 Enlarged structure diagram at position A of the present invention;

[0021] Figure 5 Schematic structure diagram of cavity one of the present invention;

[0022] Figure 6 Schematic structure diagram of the jaw of the present invention;

[0023] Figure 7 Schematic front view structure diagram of the jaw of the present invention;

[0024] Figure 8 Schematic cross-sectional view structure diagram of the top of the jaw of the present invention;

[0025] Figure 9 Of the present invention Figure 8 Enlarged structure diagram at position B of the present invention;

[0026] Figure 10 Schematic structure diagram of the roller group of the present invention;

[0027] Figure 11 Schematic structure diagram of the fixed rod of the present invention;

[0028] Figure 12 Schematic structure diagram of the insertion block of the present invention.

[0029] In the figure: 1. Connecting pipe; 2. Packer body; 21. Cavity one; 22. Limiting groove; 3. Setting; 31. Electric push rod; 32. Groove; 33. Installation ring; 34. Installation shell; 4. Fixed rod; 41. Connecting plate; 42. Return spring; 43. Roller; 44. Roller group; 45. Fixed head; 5. Jaw; 51. Support rod; 52. Push spring; 53. Fixed hole; 54. Insertion block; 541. Rubber pad; 542. Fixed plate; 55. Cavity two; 56. Rubber block; 57. Limiting block. Detailed implementation manners

[0030] In order to clearly and completely describe the objectives, technical solutions of the present invention, and make the advantages more clearly understood, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] Please refer to Figures 1 to 12 , the present invention provides a technical solution: including a connecting pipe 1, the outer wall of the connecting pipe 1 is fixedly connected with a setting packer 3, the shape of the setting packer 3 is a convex cylindrical shape, the inner wall of the connecting pipe 1 is movably inserted with a packer body 2, the outer wall of the top of one side of the setting packer 3 is fixedly connected with an electric push rod 31, a groove 32 is opened at the top of the setting packer 3, the output ends of four electric push rods 31 are fixedly connected with a mounting ring 33, the outer wall of the mounting ring 33 is hollowed out, the inner wall of the mounting ring 33 is slidably connected with the outer wall of the setting packer 3, the upper part of the outer wall of the mounting ring 33 is fixedly connected with a mounting shell 34, and a through hole with the inner and outer walls connected on both sides is opened on the outer wall of the mounting ring 33 on one side of the mounting shell 34.

[0033] By the upward movement of the electric push rod 31, the mounting ring 33 can be pushed to move upward. Then, through the upward movement of the mounting ring 33, the fixing rod 4 inside the mounting shell 34 can be driven to move. Then, through the movement of the fixing rod 4, the fixing head 45 can drive the roller group 44 to slide on one side of the clamping jaw 5, thereby pushing the clamping jaw 5 to rotate on the support rod 51, and the basic function of fixing the packer body 2 can be realized.

[0034] Embodiment 2

[0035] In order to fix the packer body 2, a fixing structure is fixedly connected to the inner walls of four grooves 32. The fixing structure includes a clamping jaw 5 and a support rod 51. The outer walls of both ends of the four support rods 51 are fixedly connected with the inner walls of the grooves 32. The outer walls of the four support rods 51 are rotatably connected with the inner walls of the clamping jaws 5. The outer walls of the four clamping jaws 5 are movably lapped with the inner wall of the mounting ring 33. The shapes of the four clamping jaws 5 are L-shaped. The outer wall of one side of the four clamping jaws 5 is fixedly connected with a pushing spring 52. One end of the pushing spring 52 is fixedly connected with the outer wall of the connecting pipe 1. The side of the connecting pipe 1 where the pushing spring 52 is located is flat-cut. Fixing holes 53 are opened on the outer wall of one side of the four clamping jaws 5, and the bottoms of the four fixing holes 53 are inclined planes.

[0036] When the gripper 5 is perpendicular to the setting packer 3 at 90 degrees, one side of the gripper 5 can be inserted into the interior of the first cavity 21 on the packer body 2, thereby fixing the packer body 2. By inserting the gripper 5 into the interior of the first cavity 21, the fixation of the gripper 5 on the packer body 2 can be increased, avoiding the situation that the gripper 5 is only fixed on the outer wall of the packer body 2, which easily causes the packer body 2 to become loose from the connecting pipe 1. Correspondingly, the fixation of the packer body 2 is increased, thereby improving the working efficiency of the packer body 2.

[0037] Embodiment Three

[0038] In order to fix the gripper 5, fixing rods 4 are slidably connected inside four mounting shells 34. Connecting plates 41 are fixedly connected to the outer walls on both sides of the four fixing rods 4. A return spring 42 is fixedly connected to the outer wall of one side of the connecting plate 41. One end of the two return springs 42 is fixedly connected to the inner wall of the mounting shell 34. The outer wall of the fixing rod 4 penetrates through the inner wall of the mounting shell 34 and is slidably connected to the through holes on the mounting ring 33. Fixing heads 45 are fixedly connected to the outer walls of one ends of the four fixing rods 4. The outer walls of the four fixing heads 45 are movably inserted into the inner walls of the fixing holes 53. One ends of the four fixing heads 45 are obliquely cut up and down, and one ends of the four fixing heads 45 close to the fixing rods 4 are obliquely cut left and right. Groove holes are formed on the outer walls of the four fixing heads 45 on the side close to the fixing rods 4. Rollers 43 are rotatably connected to the inner walls of the groove holes. Roller groups 44 are rotatably connected to one ends of the four fixing heads 45. The outer walls of the roller groups 44 are rotatably connected to the outer wall of one side of the gripper 5. Second cavities 55 are formed on both sides of the fixing holes 53. Rubber blocks 56 are fixedly connected to the inner walls of the second cavities 55. The interiors of the rubber blocks 56 are hollow. Limiting blocks 57 are fixedly connected to one sides of the rubber blocks 56. The outer walls of the limiting blocks 57 are slidably connected to the inner walls of the second cavities 55. One sides of the two limiting blocks 57 are beveled surfaces. The outer walls of the two rollers 43 are rotatably connected to the outer walls of the other sides of the limiting blocks 57. The outer walls between the two limiting blocks 57 are movably lapped with the outer wall of the fixing rod 4.

[0039] When the fixing heads 45 enter the interiors of the fixing holes 53, the fixation of the gripper 5 can be completed, avoiding the wear of the gripper 5 during long-term use, thereby weakening the fixation of the gripper 5 on the packer body 2. Correspondingly, the fixation of the gripper 5 on the packer body 2 is increased. By arranging the limiting blocks 57, the fixing heads 45 can be limited, avoiding the movement of the fixing heads 45 when the fixing heads 45 do not need to release the fixation of the gripper 5. Correspondingly, the stability of the fixing heads 45 is increased, thereby increasing the fixing effect of the fixing heads 45.

[0040] Embodiment Four

[0041] In order to increase the clamping force of the jaw 5, a first cavity 21 is provided on the outer wall of the packer body 2. The inner walls of the four first cavities 21 are fixedly connected with limiting grooves 22. An insertion block 54 is fixedly connected to the outer wall on the other side of the jaw 5. Rubber pads 541 are fixedly connected to the outer walls on the upper and lower sides of the four insertion blocks 54. The rubber pads 541 are trapezoidal in shape. A fixing plate 542 is fixedly connected to the inclined surface on one side of the rubber pad 541. The outer wall of the insertion block 54 is movably inserted into the inner wall of the limiting groove 22.

[0042] After the jaw 5 is inserted into the first cavity 21, the insertion block 54 can drive the rubber pad 541 and the fixing plate 542 into the limiting groove 22. Since the material of the rubber pad 541 is relatively soft, when the rubber pad 541 enters the limiting groove 22, it can drive the fixing plate 542 to deform according to the shape of the limiting groove 22, so as to facilitate the fixing plate 542 to enter the limiting groove 22, further increasing the fixation of the jaw 5 on the packer body 2 and correspondingly increasing the clamping force of the jaw 5.

[0043] The working principle and usage process of the present invention: During work, first, after the packer body 2 is inserted into the connecting pipe 1, the electric push rod 31 on the setting tool 3 can be started simultaneously. Then, through the upward movement of the electric push rod 31, the mounting ring 33 can be pushed to move upward. Subsequently, through the upward movement of the mounting ring 33, the fixing rod 4 inside the mounting shell 34 can be driven to move. Then, through the movement of the fixing rod 4, the fixing head 45 can drive the roller set 44 to slide on one side of the jaw 5, thereby pushing the jaw 5 to rotate on the support rod 51, so that the jaw 5 is perpendicular to the setting tool 3 by 90 degrees. At this time, one side of the jaw 5 is inserted into the first cavity 21 on the packer body 2, thereby fixing the packer body 2. By inserting the jaw 5 into the first cavity 21, the fixation of the jaw 5 on the packer body 2 can be increased, avoiding the situation that the jaw 5 is only fixed on the outer wall of the packer body 2, which easily causes the packer body 2 and the connecting pipe 1 to become loose. Correspondingly, the fixation of the packer body 2 is increased, thereby improving the working efficiency of the packer body 2.

[0044] After the gripper 5 fixes the packer body 2, the fixing holes 53 on the gripper 5 can be aligned with the through holes on the mounting ring 33. At this time, under the action of the return spring 42, the connecting plate 41 can be driven to slide inside the mounting shell 34. Then, through the movement of the connecting plate 41, the fixing rod 4 can drive the fixing head 45 to push the limiting block 57. When the limiting block 57 is subjected to the pushing force, it can squeeze the rubber block 56, causing the rubber block 56 to deform and driving it into the inner cavity two 55 of the limiting block 57, facilitating the fixing head 45 to enter the fixing hole 53, thus completing the fixation of the gripper 5. This avoids wear of the gripper 5 during long-term use, which weakens the fixation of the gripper 5 on the packer body 2, and correspondingly increases the fixation of the gripper 5 on the packer body 2. Additionally, through the setting of the limiting block 57, the fixing head 45 can be limited, preventing the fixing head 45 from moving when it is not necessary to release the fixation of the gripper 5, correspondingly increasing the stability of the fixing head 45, and thus enhancing the fixing effect of the fixing head 45.

[0045] It should be noted that when it is necessary to rotate or replace the packer body 2, the electric push rod 31 can move downward, causing the mounting ring 33 to drive the fixing head 45 on the fixing rod 4 to move downward. When the inclined surface at the bottom of the fixing head 45 rubs and squeezes against the inclined surface at the bottom of the fixing hole 53, the roller 43 on the fixing head 45 can squeeze the limiting block 57, causing the fixing head 45 to move out of the fixing hole 53, thus releasing the fixation of the gripper 5. After the mounting ring 33 moves to the bottom of the gripper 5, by using the setting of the pushing spring 52, the gripper 5 can be pushed out from the inner wall of the cavity one 21, thus releasing the fixation of the packer body 2, facilitating the rotation or replacement of the packer body 2.

[0046] After the gripper 5 is inserted into the cavity one 21, the insertion block 54 can drive the rubber pad 541 and the fixing plate 542 into the limiting groove 22. Since the material of the rubber pad 541 is relatively soft, when the rubber pad 541 enters the limiting groove 22, it can drive the fixing plate 542 to deform according to the shape of the limiting groove 22, facilitating the fixing plate 542 to enter the limiting groove 22, further increasing the fixation of the gripper 5 on the packer body 2, and correspondingly increasing the clamping force of the gripper 5.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter packer capable of hanging a screen pipe, comprising a connecting pipe (1), characterized in that: The outer wall of the connecting pipe (1) is fixedly connected to a setting seal (3), the setting seal (3) is in the shape of a boss cylinder, the inner wall of the connecting pipe (1) is movably plugged with a packer body (2), the outer wall of the top of one side of the setting seal (3) is fixedly connected to an electric push rod (31), the top of the setting seal (3) is provided with a groove (32), and the inner walls of the four grooves (32) are fixedly connected to a fixing structure; The fixing structure comprises a clamping jaw (5) and a support rod (51), the outer walls at both ends of the four support rods (51) are fixedly connected to the inner wall of the groove (32), and the outer walls of the four support rods (51) are rotatably connected to the inner wall of the clamping jaw (5); The output ends of the four electric push rods (31) are fixedly connected to a mounting ring (33); the outer wall of the mounting ring (33) is hollow; the inner wall of the mounting ring (33) is slidably connected to the outer wall of the setting seal (3); the upper part of the outer wall of the mounting ring (33) is fixedly connected to a mounting shell (34); and the outer wall of the mounting ring (33) located on one side of the mounting shell (34) is provided with a through hole that connects the inner and outer walls on both sides; The outer walls of the four clamping jaws (5) are movably overlapped with the inner wall of the mounting ring (33); the shape of the four clamping jaws (5) is L-shaped; the outer wall of one side of the four clamping jaws (5) is fixedly connected with a push spring (52); one end of the push spring (52) is fixedly connected with the outer wall of the connecting tube (1); the connecting tube (1) is flat on one side of the push spring (52); the outer wall of one side of the four clamping jaws (5) is provided with a fixing hole (53); the bottom of the four fixing holes (53) is an inclined surface; The four mounting shells (34) are slidably connected to fixing rods (4), the outer walls on both sides of the four fixing rods (4) are fixedly connected to connecting plates (41), the outer wall on one side of the connecting plate (41) is fixedly connected to a return spring (42), one end of the two return springs (42) is fixedly connected to the inner wall of the mounting shell (34), and the outer wall of the fixing rod (4) passes through the inner wall of the mounting shell (34) and is slidably connected to the through hole on the mounting ring (33); The outer wall of one end of the four fixing rods (4) is fixedly connected to a fixing head (45), the outer wall of the four fixing heads (45) is movably plugged into the inner wall of the fixing hole (53), one end of the four fixing heads (45) is beveled up and down, and one end of the four fixing heads (45) close to the fixing rod (4) is beveled left and right; A slot is formed on an outer wall of the four fixed heads (45) on one side close to the fixed rod (4); a roller (43) is rotatably connected to the inner wall of the slot; one end of the four fixed heads (45) is rotatably connected to a roller group (44); and an outer wall of the roller group (44) is rotatably connected to an outer wall of one side of the clamping claw (5).

2. A large-diameter packer capable of hanging a screen pipe according to claim 1, characterized in that: A second cavity (55) is provided on both sides of the fixing hole (53); a rubber block (56) is fixedly connected to the inner wall of the second cavity (55); the interior of the rubber block (56) is hollow; a limiting block (57) is fixedly connected to one side of the rubber block (56); and the outer wall of the limiting block (57) is slidably connected to the inner wall of the second cavity (55).

3. A large-diameter packer capable of hanging a screen pipe according to claim 2, characterized in that: One side of the two limit blocks (57) is a beveled surface, the outer walls of the two rollers (43) are rotatably connected to the outer wall of the other side of the limit blocks (57), and the outer wall between the two limit blocks (57) is movably overlapped with the outer wall of the fixing rod (4).

Images