Novel pushing cylinder device for bridge plug

Abstract

The utility model relates to a novel push cylinder device for a bridge plug. The novel push cylinder device comprises a setting tool body, a pull rod is mounted at one end of the setting tool body; a locking spring is mounted at the upper end of the pull rod; one side of the pull rod is in threaded connection with a guide joint; the outer wall of the setting tool body is in threaded connection with a push cylinder; the outer wall of the setting tool body is in threaded connection with an adjusting joint; the adjusting joint is arranged in the push cylinder; the upper end of the locking spring is installed on the inner wall of the groove in the lower end of the adjusting connector. The problems that in the prior art, due to the fact that the outer diameter of the bridge plug pushing cylinder is reduced, the bridge plug is abraded by the well bottom in the tripping-in process, and the impact risk is improved are solved, and a series of abnormal conditions such as setting in advance in the tripping-in process of the bridge plug are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum development, and specifically relates to a new type of push barrel device of bridge plug. BACKGROUND

[0002] The outer diameter of the push barrel of the bridge plug setting adapter is slightly larger than the maximum outer diameter of the bridge plug body or is equal. The purpose is to protect the bridge plug from damage during running, especially during pumping in the horizontal wellbore. With the development of technology, soluble bridge plugs have appeared. In some special well conditions, such as casing deformation, the tool string is prone to sticking. The previous cast iron bridge plug and composite bridge plug can only be salvaged by coiled tubing after sticking. If the bridge plug is stuck, the soluble bridge plug can be dissolved and unstuck by pumping a dissolving agent (hydrochloric acid or potassium chloride solution). Therefore, the field requires that the outer diameter of the bridge plug push barrel be as small as possible, so that even if the bridge plug is stuck, the bridge plug can be dissolved and unstuck without coiled tubing, thereby reducing economic losses.

[0003] The defects of the prior art are:

[0004] Due to the reduction of the outer diameter of the bridge plug push barrel, the risk of bridge plug bottom wear and impact during running is greatly increased, which can easily cause the bridge plug to be prematurely set during running and other abnormal conditions. SUMMARY

[0005] The utility model provides a new type of push barrel device of bridge plug aiming at the above problems, which aims to solve the problem of the reduction of the outer diameter of the bridge plug push barrel in the prior art, which increases the risk of bridge plug bottom wear and impact during running, and avoids the premature setting of the bridge plug during running and other abnormal conditions.

[0006] To solve the above problems, the utility model provides the technical scheme as follows:

[0007] A new type of push barrel device of bridge plug, comprising a setting tool body; one end of the setting tool body is provided with a pull rod; the upper end of the pull rod is provided with a locking spring; one side of the pull rod is threadedly connected with a guide joint; the outer wall of the setting tool body is threadedly connected with a push barrel; the outer wall of the setting tool body is threadedly connected with an adjusting joint; the adjusting joint is arranged in the interior of the push barrel; the upper end of the locking spring is arranged in the inner wall of the groove at the lower end of the adjusting joint.

[0008] Preferably, the setting tool body comprises a setting tool connecting sleeve and a setting tool lower mandrel; the outer wall of the setting tool lower mandrel is arranged on the inner wall of the setting tool connecting sleeve; the inner wall of the push barrel is threadedly connected with the outer wall of the setting tool connecting sleeve; and the inner wall of the adjusting joint is threadedly connected with the outer wall of the setting tool lower mandrel.

[0009] Preferably, the setting tool connecting sleeve is fixedly connected with the push cylinder through a first tight pin; and the setting tool lower core shaft is fixedly connected with the adjusting joint through a second tight pin.

[0010] Preferably, the pull rod is fixedly connected with the guide joint through a third tight pin; one side of the push cylinder is provided with a shear pin; and the pull rod is fixedly connected with the bridge plug central pipe through a fourth tight pin.

[0011] Preferably, a rubber pad is sleeved on the rubber sleeve at one end of the pull rod.

[0012] Preferably, a lower end protection ring is fixedly connected to the bottom end of the push cylinder; the two ends of the lower end protection ring are provided with slopes; a positioning ring is fixedly connected to the top end of the push cylinder; the two ends of the positioning ring are provided with slopes; and an upper end protection ring is fixedly connected to the top end of the push cylinder.

[0013] Preferably, the outer diameter of the upper end protection ring is ≤102mm; the outer wall of the push cylinder is ≤96mm; the wall thickness of the push cylinder is ≥5.93mm; the width of the lower end protection ring is 7mm; and the width of the positioning ring is 80mm.

[0014] Preferably, the material of the push cylinder is a steel material of steel grade 125 or above.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. The composite connection structure of the pull rod and the push cylinder enhances the overall stability of the push cylinder during transportation and running in.

[0017] 2. The cooperation design of the adjusting joint and the push cylinder reduces the outer diameter of the push cylinder, thereby reducing the risk of tool string sticking.

[0018] 3. The optimization of the surface treatment of the push cylinder reduces the frictional resistance in the well, thereby prolonging the service life.

[0019] 4. The fine matching of the inner and outer structures improves the reliability and adaptability of the bridge plug in the complex environment in the well, and at the same time, the diameter is minimized while ensuring the strength of the push cylinder, so that even if the sticking occurs, the pump injection of the dissolving agent can quickly dissolve the sticking, and the on-site operation difficulty and economic loss are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of the new push cylinder device of the bridge plug of the specific embodiment of the present application;

[0021] Figure 2This is a schematic diagram of the bridge plug seat of a specific embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the tool being removed after the bridge plug is seated, according to a specific embodiment of the present invention.

[0023] The components are: 1. Setting tool body; 101. Setting tool connecting sleeve; 102. Setting tool lower spindle; 2. First set pin; 3. Push cylinder; 4. Second set pin; 5. Adjusting joint; 6. Pull rod; 7. Locking spring; 8. Shear pin; 9. Guide joint; 10. Third set pin; 11. Rubber pad; 12. Fourth set pin. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0025] like Figure 1 , 2 As shown in Figure 3, a novel bridge plug pusher device includes a setting tool body 1; a pull rod 6 is installed at one end of the setting tool body 1; a locking spring 7 is installed at the upper end of the pull rod 6; a guide joint 9 is threadedly connected to one side of the pull rod 6; a pusher 3 is threadedly connected to the outer wall of the setting tool body 1; an adjustment joint 5 is threadedly connected to the outer wall of the setting tool body 1; the adjustment joint 5 is located inside the pusher 3; and the upper end of the locking spring 7 is installed on the inner wall of the groove at the lower end of the adjustment joint 5.

[0026] It should be noted that the setting tool body 1 includes a setting tool connecting sleeve 101 and a setting tool lower spindle 102; the outer wall of the setting tool lower spindle 102 is installed on the inner wall of the setting tool connecting sleeve 101; the inner wall of the push cylinder 3 is threadedly connected to the outer wall of the setting tool connecting sleeve 101; and the inner wall of the adjusting joint 5 is threadedly connected to the outer wall of the setting tool lower spindle 102.

[0027] It should be further explained that the setting tool connecting sleeve 101 and the push cylinder 3 are fixedly connected by the first set pin 2; the setting tool lower spindle 102 and the adjusting joint 5 are fixedly connected by the second set pin 4.

[0028] It should be further explained that when the pusher 3 is screwed into the thread of the setting tool connecting sleeve 101, and the pin hole is aligned with the groove of the setting tool connecting sleeve 101, the first set pin 2 is inserted, the adjusting joint 5 is threadedly connected to the lower spindle 102 of the setting tool, and tightened with hand pliers, and the second set pin 4 is tightened.

[0029] It needs to be explained that the pull rod 6 is fixedly connected with the guide joint 9 through the third tight pin 10; one side of the push cylinder 3 is provided with a shear pin 8; the pull rod 6 is fixedly connected with the bridge plug center pipe through the fourth tight pin 12.

[0030] It needs to be further explained that after the pull rod 6 is installed, the upper end of the pull rod 6 is provided with a locking spring 7, the fourth tight pin 12 is tightened after the bridge plug center pipe is inserted into the bridge plug from the upper end of the bridge plug and connected with the shear release assembly at the lower end of the bridge plug, the upper end of the guide joint 9 is threadedly connected with the pull rod 6, until the taper surface of the guide joint 9 is matched with the taper surface of the center pipe, and the third tight pin 10 is tightened.

[0031] It needs to be explained that the rubber pad 11 is sleeved on the rubber cylinder at one end of the pull rod 6.

[0032] It needs to be explained that the bottom end of the push cylinder 3 is fixedly connected with a lower end protection ring 3.1; the two ends of the lower end protection ring 3.1 are provided with slopes; the top end of the push cylinder 3 is fixedly connected with a positioning ring 3.2; the two ends of the positioning ring 3.2 are provided with slopes; and the top end of the push cylinder 3 is fixedly connected with an upper end protection ring 3.3.

[0033] In the specific embodiment, the outer diameter of the upper end protection ring 3.3 is ≤102mm; the outer wall of the push cylinder 3 is ≤96mm; the wall thickness of the push cylinder 3 is ≥5.93mm; the width of the lower end protection ring 3.1 is 7mm; and the width of the positioning ring 3.2 is 80mm.

[0034] It needs to be explained that the material of the push cylinder 3 is steel material above steel grade 125.

[0035] It needs to be further explained that taking the 102mm outer diameter dissolvable bridge plug as an example, the outer diameter of the upper end protection ring 3.3 of the push cylinder 3 is ≤102mm, the outer diameter of the rubber cylinder is ≤100mm, the outer diameter of the upper end protection ring of the bridge plug rubber cylinder is ≤102mm, the width is about 50mm, the outer diameter of the body of the push cylinder 3 is ≤96mm, the material is above steel grade 125, the inside is thickened, the wall thickness is ≥5.93mm, the width of the lower end protection ring 3.1 of the push cylinder 3 is about 7mm, the two ends are provided with slopes, the water tank circumference is ≥1 / 2 circumference, the outer diameter is ≤102mm, the width of the upper end positioning ring 3.2 of the push cylinder 3 is about 80mm, the two ends are provided with slopes, the outer diameter is ≤102mm, the water tank circumference is ≥3 / 4, the righting bar is ≥6, the overall safety factor is ≥1.8 (204℃ high temperature, the tool inner passage is ≥40mm, suitable for casing inner diameter 118-111mm, pressure difference bearing is ≥90MPa, the body of the push cylinder 3 is provided with a width ≥25.4mm, a height of about 110mm, two water passage, a water round hole of about Ф38.1mm.

[0036] It needs to be further explained that the working principle and use process of the utility model are: through first installing the pull rod 6, the upper end of the pull rod 6 is equipped with the locking spring 7;Again, the bridge plug central tube is inserted from the bridge plug upper end and is connected with the shear pin 8 at the bridge plug lower end;The upper guide joint 9 is connected with the pull rod 6 in threaded cooperation, until the taper surface of the guide joint 9 and the taper surface of the central tube are attached;Then the adjusting joint 5 is connected with the setting tool body 1 in threaded connection;The push cylinder 3 is rotated into the setting tool body 1;The upper end of the locking spring 7 is equipped in the recess under the adjusting joint 5;Through the wrench rotation bridge plug until the upper end of the bridge plug slip ring and the right end surface of the push cylinder 3 just contact, and the bridge plug assembly is completed;When the bridge plug is lowered to the predetermined position, the pressure is applied to the tubing through the ground equipment, the pressure is transmitted to the push cylinder 3, the push cylinder 3 is pushed to overcome the resistance and starts to move;The hydraulic pressure acts on the piston, the piston drives the setting tool connecting sleeve 101 to push the push cylinder 3 to move downward;The shear pin 8 is cut short, and the lock sleeve, the central tube, the rubber cylinder, the cone and other components are sequentially pushed, so that the slip is stretched out and the sleeve pipe is anchored, and the rubber cylinder is compressed and sealed around the sleeve pipe;At this time, the setting of the bridge plug is completed, the bridge plug slip is anchored, and the setting tool lower spindle 102 starts to be pulled up with the adjusting joint 5, the pull rod 6, the guide joint 9;The push cylinder 3 pushes the bridge plug downward, and when the forces in two directions reach the bridge plug release design force value, the bridge plug release action is completed, the tool string is pulled up, and the setting tool body 1, the push cylinder 3, the adjusting joint 5 and the pull rod 6 are taken out, the setting tool accessories are completed, the bridge plug is sent in, set, and released.

[0037] In the detailed description above, various features are grouped together in single embodiments for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than the claims do. Rather, such aspects are merely of particular interest to the inventors. Thus, any of the features from one embodiment can be combined with any of the features from another embodiment, including combinations of features from a single embodiment. The following claims are hereby expressly incorporated by reference into this detailed description.

[0038] In order for any person skilled in the art to be able to implement or use the utility model, the above discloses the embodiments. For those skilled in the art, various modifications of these embodiments are obvious, and the general principles defined herein can also be applied to other embodiments without departing from the spirit and protection scope of the disclosure. Therefore, the disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in the present disclosure.

[0039] The above description includes examples of one or more embodiments. Of course, describing all possible combinations of components or methods for describing the above embodiments is impossible, but one of ordinary skill in the art should recognize that various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to encompass all such changes, modifications and variations falling within the scope of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the scope is similar to the term "including" as explained in the claims as a conjunction word. In addition, using any one term "or" in the specification of the claims is to mean "non-exclusive or".

[0040] The above specific embodiments are described in detail for the purpose of explaining the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A novel pushing device for a bridge plug, characterized by: The utility model provides a setting tool, which comprises a setting tool body (1), a pull rod (6) is installed at one end of the setting tool body (1), a locking spring (7) is installed at the upper end of the pull rod (6), a guide joint (9) is threadedly connected to one side of the pull rod (6), a push cylinder (3) is threadedly connected to the outer wall of the setting tool body (1), an adjusting joint (5) is threadedly connected to the outer wall of the setting tool body (1), the adjusting joint (5) is arranged in the inside of the push cylinder (3), and the upper end of the locking spring (7) is installed in the inner wall of the groove at the lower end of the adjusting joint (5).

2. The new pushing barrel device of bridge plug according to claim 1, characterized in that: The setting tool body (1) comprises a setting tool connecting sleeve (101) and a setting tool lower mandrel (102), the outer wall of the setting tool lower mandrel (102) is installed on the inner wall of the setting tool connecting sleeve (101), the inner wall of the push cylinder (3) is threadedly connected to the outer wall of the setting tool connecting sleeve (101), and the inner wall of the adjusting joint (5) is threadedly connected to the outer wall of the setting tool lower mandrel (102).

3. The new push barrel device of bridge plug according to claim 2, characterized in that: The setting tool connecting sleeve (101) and the push cylinder (3) are fixedly connected through a first tight pin (2), the setting tool lower mandrel (102) and the adjusting joint (5) are fixedly connected through a second tight pin (4).

4. The new pushing barrel device of bridge plug according to claim 1, characterized in that: The pull rod (6) and the guide joint (9) are fixedly connected through a third tight pin (10), one side of the push cylinder (3) is provided with a shear pin (8), and the pull rod (6) and a bridge plug central pipe are fixedly connected through a fourth tight pin (12).

5. The new push barrel device for bridge plug as claimed in claim 1, wherein: A rubber pad (11) is sleeved on the rubber sleeve at one end of the pull rod (6).

6. The new pushing barrel device of bridge plug according to claim 1, characterized in that: The bottom end of the push cylinder (3) is fixedly connected with a lower end protection ring (3.1), the two ends of the lower end protection ring (3.1) are provided with slopes, the top end of the push cylinder (3) is fixedly connected with a positioning ring (3.2), the two ends of the positioning ring (3.2) are provided with slopes, and the top end of the push cylinder (3) is fixedly connected with an upper end protection ring (3.3).

7. The bridge plug novel push tube device of claim 6, wherein: The outer diameter of the upper end protection ring (3.3) is less than or equal to 102 mm, the outer diameter of the push cylinder (3) is less than or equal to 96 mm, the wall thickness of the push cylinder (3) is greater than or equal to 5.93 mm, the width of the lower end protection ring (3.1) is 7 mm, and the width of the positioning ring (3.2) is 80 mm.

8. The bridge plug novel push tube device of claim 7, wherein: The material of the push cylinder (3) is a steel material with a steel grade of 125 or above.

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