Drillless staged cementing device

Abstract

The utility model discloses a kind of free drilling graded cementing devices, it is related to well drilling technical field, including pipe body, the upper and lower ends of the pipe body are respectively fixedly connected with connecting pipe one and connecting pipe two, the inside of the pipe body is fixedly connected with intercept module and adjusting module, the adjusting module is below connecting pipe one, the intercept module is below adjusting module, the intercept module includes collection frame, the collection frame is in the inside of pipe body and is fixedly connected with pipe body, the inner wall of the collection frame is fixedly connected with filter screen one, the outside of connecting pipe two is equipped with sealing ring one, when broken disc breaks, large fragment will be intercepted by funnel-shaped filter screen two, avoid entering lower casing, while the fragment intercepted along filter screen two falls to the clearance between collection frame and pipe body and is collected in concentration, residual liquid is discharged through the filter screen one of collection frame inner wall, and filter screen one prevents fragment from losing with liquid, ensure that pipe string passage is unobstructed.

Description

Technical Field

[0001] This utility model relates to a drilling-free graded cement injection device, which relates to the field of drilling technology, and specifically to a drilling-free graded cement injection device. Background Technology

[0002] The no-drill staged cementing device reduces the frictional resistance between the casing and the wellbore during casing string running operations through a floating mechanism, assisting the casing to reach the designed depth smoothly. At the same time, it is necessary to ensure the full bore of the casing string during subsequent cementing operations to ensure the smooth progress of subsequent procedures such as cement slurry circulation, logging, and perforation.

[0003] After the breaker disc of a traditional tool breaks, the resulting large fragments can easily enter the lower casing or cementing tool with the fluid, which may cause blockage of the tubing passage, hindering cement slurry circulation. Furthermore, traditional tools cannot regulate the pressure in the floating chamber when running casing to ensure pressure stability during the casing string running process. Utility Model Content

[0004] This utility model provides a drill-free graded cement injection device. One purpose is to have a graded debris interception function to solve the problem of debris clogging the tubing. Another purpose is to solve the problem that traditional tools cannot adjust the floating chamber pressure during casing installation, so as to improve the pressure stability during casing installation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A drill-free graded cement injector includes a pipe body, with a connecting pipe one and a connecting pipe two fixedly connected to the upper and lower ends of the pipe body, respectively. An interception module and an adjustment module are fixedly connected inside the pipe body, with the adjustment module located below the connecting pipe one and the interception module located below the adjustment module.

[0006] A further improvement of the present invention is that the interception module includes a collection rack, the collection rack is located inside the tube and is fixedly connected to the tube, a filter screen is fixedly connected to the inner wall of the collection rack, and a sealing ring is sleeved on the outer side of the connecting tube.

[0007] A further improvement of the present invention is that: a filter screen two is fixedly connected above the collection rack, a fixing frame three is fixedly connected to the top of the filter screen two, a fixing frame one is fixedly connected to the outside of the fixing frame three, a fixing frame two is fixedly connected above the fixing frame one, the fixing frame one is fixedly connected to the tube body, and the filter screen two is funnel-shaped.

[0008] A further improvement of the present invention is that: the adjustment module includes a spring, the spring is sleeved on the outside of the sealing ring three, the spring is located above the fixing frame one, a slide is fixedly connected above the spring, a fixing frame four is fixedly connected above the fixing frame two, a crushing disc is fixedly connected above the fixing frame four, and a sealing ring two is sleeved on the outside of the connecting pipe one.

[0009] A further improvement of this utility model is that: the crushing disc is located above the slide table, a step is provided below the crushing disc, and a sealing ring is fixedly connected to the slide table below the step of the crushing disc.

[0010] A further improvement of this utility model is that: a guide rail is fixedly connected to the inner side of the tube body, and a sliding groove is opened on the outer side of the slide table and slidably connected to the guide rail.

[0011] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: This utility model provides a drill-free graded cement injector. When the crushing disc breaks, large fragments are intercepted by a funnel-shaped filter screen II, preventing them from entering the lower sleeve. At the same time, the intercepted fragments slide down along the filter screen II to the gap between the collection rack and the tube body for collection. The residual liquid is discharged through the filter screen I on the inner wall of the collection rack, and the filter screen I prevents the fragments from being lost with the liquid, ensuring that the tube column channel is unobstructed.

[0012] This utility model provides a drilling-free graded cement injector. When liquid is injected into the pipe, the liquid pushes the slide table down the guide rail, squeezes the spring and opens the flow channel with the crushing disc, so that the liquid is injected into the floating chamber through the connecting pipe. After the liquid injection stops, the spring pushes the slide table to reset and close the flow channel, maintaining the pressure of the floating chamber and adapting to the pressure fluctuations during the casing process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the drill-free graded cement injector of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tube body of this utility model; Figure 3 This is a schematic diagram of the interception module of this utility model; Figure 4 This is a schematic diagram of the structure of the adjustment module of this utility model; Figure 5 This is a schematic diagram of the sealing structure of the slide table and crushing disc of this utility model; Figure 6 This is a schematic diagram of the guide structure of the slide table of this utility model.

[0014] In the diagram: 1. Pipe body; 2. Connecting pipe one; 3. Connecting pipe two; 4. Interception module; 5. Adjustment module; 41. Sealing ring one; 42. Filter screen one; 43. Collection rack; 44. Filter screen two; 45. Fixing frame one; 46. Fixing frame two; 47. Fixing frame three; 51. Spring; 52. Slide table; 53. Sealing ring two; 54. Fixing frame four; 55. Crushing disc; 56. Sealing ring three; 57. Guide rail. Detailed Implementation

[0015] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments: like Figure 1 As shown, this utility model provides a drilling-free graded cement injection device, including a pipe body 1. The upper and lower ends of the pipe body 1 are respectively fixedly connected to a connecting pipe 2 and a connecting pipe 3. The connecting pipe 2 is located at the upper end of the pipe body 1 and is used to connect to the upper casing string. It is the injection inlet for high-pressure drilling fluid and cement slurry. It will then cooperate with the adjustment module 5 to realize pressure adjustment and breaker plate triggering. The connecting pipe 3 is located at the lower end of the pipe body 1 and is used to connect to the lower floating chamber. It is the outlet for liquid injection into the floating chamber when adjusting buoyancy. At the same time, it will then cooperate with the interception module 4 to realize fluid guidance after fragment interception.

[0016] like Figure 2 As shown, the pipe body 1 is fixedly connected to the interception module 4 and the adjustment module 5. The adjustment module 5 is located below the connecting pipe 2, and the interception module 4 is located below the adjustment module 5. The pipe body 1, as the core bearing component, has a reserved installation slot on its inner wall to fix the subsequent interception module 4 and adjustment module 5, while ensuring that the internal diameter of the tool is consistent with the sleeve, providing a channel for fluid flow.

[0017] like Figure 3 As shown, this utility model provides a technical solution: the interception module 4 includes a collection rack 43, which is located inside the tube body 1 and fixedly connected to the tube body 1. A filter screen 42 is fixedly connected to the inner wall of the collection rack 43. A sealing ring 41 is sleeved on the outer side of the connecting tube 3. A filter screen 44 is fixedly connected to the top of the collection rack 43. A fixing frame 47 is fixedly connected to the top of the filter screen 44. A fixing frame 45 is fixedly connected to the outer side of the fixing frame 47. A fixing frame 46 is fixedly connected to the top of the fixing frame 45. The fixing frame 45 is fixedly connected to the tube body 1. The filter screen 44 is funnel-shaped. When the crushing disc 55 breaks, large fragments fall under the action of gravity. The funnel-shaped structure can actively guide the fragments to slide towards the edge, avoiding the accumulation of fragments in the central channel. At the same time, the filter screen pores allow cement slurry to pass through. Meanwhile, the filter screen 42 is fixed to the inner wall of the collection rack 43, allowing only liquid to pass through and not allowing cement slurry and large fragments to pass through.

[0018] like Figure 4As shown, this utility model provides a technical solution: the adjustment module 5 includes a spring 51, which is sleeved on the outside of the sealing ring 3 56. The spring 51 is located above the fixing frame 1 45. A slide 52 is fixedly connected above the spring 51. A fixing frame 44 is fixedly connected above the fixing frame 2 46. A crushing disc 55 is fixedly connected above the fixing frame 44. A sealing ring 2 53 is sleeved on the outside of the connecting pipe 1 2. When the injected liquid pushes the slide 52 down, it opens the flow channel with the crushing disc 55. The spring 51 is compressed and stores elastic potential energy, which is used to push the slide to reset after the liquid injection stops.

[0019] like Figure 5 As shown, this utility model provides a technical solution: the crushing disc 55 is located above the slide table 52, and a step is provided below the crushing disc 55. A sealing ring 3 56 is fixedly connected to the slide table 52 below the step of the crushing disc 55. The sealing ring 3 56 is fixed by a slot directly below the step of the crushing disc 55. When the slide table 52 moves upward under the action of the spring 51, the sealing ring 3 56 will fit against the bottom surface of the step of the crushing disc 55, blocking the gap between the slide table 52 and the crushing disc 55, and preventing liquid from leaking from the gap.

[0020] like Figure 6 As shown, this utility model provides a technical solution: a guide rail 57 is fixedly connected to the inner side of the tube body 1, and a sliding groove is opened on the outer side of the slide table 52 and is slidably connected to the guide rail 57. When the liquid pushes the slide table 52 down or the spring 51 pushes the slide table 52 up, the sliding groove will slide along the guide rail 57 to avoid the slide table from shifting or getting stuck due to the impact of high pressure fluid.

[0021] The working principle of this drill-free graded cement injector will be explained in detail below.

[0022] like Figure 1-6As shown, during the casing string lowering into the wellbore, when it is necessary to adjust the fluid volume inside the floating chamber below the tool, drilling fluid is injected into the casing 1. The fluid pressure acts on the top of the slide 52. Since the inner side of the casing 1 is fixed with a guide rail 57, and the outer side of the slide 52 has a groove that slides and is slidably connected to the guide rail 57, the slide 52 will slide steadily downward along the guide rail 57, while simultaneously compressing the spring 51 below it. As the slide 52 slides downward, the annular gap between it and the upper breaker plate 55 gradually expands, forming an open flow channel. At this time, the fluid can flow in from the gap on the side of the breaker plate 55 and be injected into the floating chamber below the connecting pipe 2 3 through the connecting pipe 2 3. By controlling the amount of injected fluid, Precise adjustment of the fluid density and pressure within the floating chamber ensures that even with a small amount of liquid injected, the chamber remains predominantly low-density, resulting in greater buoyancy. This reduces frictional resistance between the casing and the wellbore, aiding in the lowering of long horizontal casing sections. After injection ceases, the compressed spring 51 releases its elastic potential energy, pushing the slide 52 upwards along the guide rail 57 to re-align with the step below the breaker disc 55, closing the flow channel and maintaining the current buoyancy and pressure state of the floating chamber. When the casing string reaches the designed depth, high-pressure drilling fluid is injected into the tool through connecting pipe 2. The high-pressure fluid acts directly on the top of the breaker disc 55. When the pressure reaches the designed fracturing threshold of the breaker disc 55, the breaker disc 55... The pre-splitting groove breaks, and the fragments fall downwards under the action of gravity and fluid thrust. Large fragments from the crushing disc 55 first fall onto the funnel-shaped filter screen 2 44. The funnel structure of filter screen 2 44 can intercept large fragments, preventing them from entering the lower sleeve and clogging the channel. At the same time, the pores of the filter screen allow subsequent cement slurry to pass through smoothly. The intercepted large fragments slide down the inclined surface of filter screen 2 44 to the annular gap between the collection rack 43 and the pipe body 1, achieving centralized collection of fragments. Residual liquid in the tool can be discharged through filter screen 1 42 fixed to the inner wall of the collection rack 43. Filter screen 1 42 only allows liquid to pass through, preventing fragments from being lost with the liquid and avoiding the accumulation of liquid in the tool, which would affect the performance of subsequent cement slurry. Once the fragments are intercepted, the tool enters full-bore mode to meet the requirements for cement slurry circulation and solidification. Then, cement slurry is injected into the tool. The cement slurry passes through the connecting pipe 1 2, the central channel formed after the rupture of the rupture disc 55, and the pores of the filter screen 2 44 in sequence, and smoothly enters the casing and wellbore annular space below the connecting pipe 2 3 to achieve cementing operation. When the cement slurry flows through the collection frame 43, it fills the gap between the collection frame 43 and the pipe body 1 to wrap the previously collected rupture disc fragments. At the same time, the filter screen 1 42 on the inner wall of the collection frame 43 prevents the cement slurry from leaking outward, ensuring that all the cement slurry is used to fill the annular space between the casing and the well wall to form a complete cement ring.

[0023] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A drill-free, graded cement injector, comprising a pipe body (1), characterized in that: The upper and lower ends of the tube body (1) are respectively fixedly connected to a connecting pipe one (2) and a connecting pipe two (3). The inside of the tube body (1) is fixedly connected to an interception module (4) and an adjustment module (5). The adjustment module (5) is located below the connecting pipe one (2), and the interception module (4) is located below the adjustment module (5). The interception module (4) includes a collection rack (43), a filter screen two (44) is fixedly connected above the collection rack (43), a fixing frame three (47) is fixedly connected to the top of the filter screen two (44), a fixing frame one (45) is fixedly connected to the outside of the fixing frame three (47), the fixing frame one (45) is fixedly connected to the tube body (1), a fixing frame two (46) is fixedly connected above the fixing frame one (45), the fixing frame one (45) is fixedly connected to the tube body (1), and the filter screen two (44) is funnel-shaped; The adjustment module (5) includes a spring (51), which is sleeved on the outside of the sealing ring three (56). The spring (51) is located above the fixing frame one (45). A slide table (52) is fixedly connected above the spring (51). A fixing frame four (54) is fixedly connected above the fixing frame two (46). A crushing disc (55) is fixedly connected above the fixing frame four (54). A sealing ring two (53) is sleeved on the outside of the connecting pipe one (2).

2. The drilling-free, staged cement injector according to claim 1, characterized in that: The collection rack (43) is located inside the tube (1) and is fixedly connected to the tube (1). A filter screen (42) is fixedly connected to the inner wall of the collection rack (43), and a sealing ring (41) is sleeved on the outer side of the connecting tube (3).

3. The drilling-free, staged cement injector according to claim 2, characterized in that: The crushing disc (55) is located above the slide (52), and a step is provided below the crushing disc (55). A sealing ring three (56) is fixedly connected to the slide (52) below the step of the crushing disc (55).

4. The drill-free, staged cement injector according to claim 3, characterized in that: The inner side of the tube (1) is fixedly connected to a guide rail (57), and the outer side of the slide table (52) has a sliding groove and is slidably connected to the guide rail (57).

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