Bridge-launched joint wellbore diameter rapid detection device

Abstract

This invention provides a rapid wellbore diameter detection device for bridge-type combined drilling and injection systems, comprising a front guide shoe, a core rod, and a cone. The rear end of the front guide shoe is threadedly connected to the front end of the core rod. The small end of the cone extends forward and is threadedly connected to the rear end of the core rod. The front guide shoe is at least partially cylindrical, with the diameter of the cylindrical portion being the same as the diameter of the large end of the cone. A pumping cup is fixedly fitted onto the core rod, with the outer diameter of the pumping cup being larger than the diameter of the large end of the cone. Using this invention, the pumping cup seals the well wall and the cone, allowing for pumping downhole pressure at the wellhead to test the permeability of the corresponding wellbore diameter. This replaces the traditional method of repeatedly running the device downhole to test permeability, reducing engineering complexity and risk, and saving construction costs. The core rod and cone are arranged alternately, and their number can be adjusted according to the well type, providing good adaptability.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge-shooting combined operation devices, specifically to a rapid detection device for the wellbore diameter of bridge-shooting combined operation devices. Background Technology

[0002] Horizontal well staged stimulation technology remains the "golden key" to breakthroughs in unconventional oil and gas production, and bridge-shooting combined operation is one of the key technologies for achieving horizontal well staged stimulation. However, according to statistics, the casing deformation rate of bridge-shooting combined operation in some areas is as high as 62.45%. After casing deformation occurs in the wellbore, the bridge-shooting combined operation tool string is prone to encountering obstruction and jamming.

[0003] Currently, when the perforating tool string encounters obstruction or jamming during bridge-shooting combined operations, the on-site bridge-shooting team typically modifies the tool string dimensions (e.g., reducing the outer diameter or shortening the length) and repeatedly attempts to lower the tool string into the well under pressure to determine the overall passability of the tool string at the obstruction location. On average, this involves three well runs, lasting approximately 15 hours. In complex situations where wellbore problems are suspected, this traditional approach directly increases the complexity and risk of the bridge-shooting combined operation, leading to wasted construction costs.

[0004] Regarding rapid detection technology for wellbore diameter in bridge-fracturing combined operations, some scholars have explored other approaches. For example, patent document CN116291371A discloses a method for rapidly determining and addressing casing deformation using pumped soluble balls. This method involves statistically analyzing the minimum inner diameter range of deformed casing in horizontal wells within a volumetric fracturing operation block, using the inner diameter value with the largest proportion as the maximum outer diameter of the soluble metal ball. Based on an outer diameter difference of 5mm-10mm, various soluble metal balls with through holes are designed sequentially, corresponding to perforating guns of different outer diameter specifications. The soluble metal balls are then lowered sequentially from smallest to largest outer diameter, and the change in wellhead pressure is observed to determine the inner diameter at the casing deformation point. A temporary plugging ball and bridge plug of the corresponding perforating gun specification are then lowered to complete formation segmentation. However, this method suffers from limitations. During the pumping of soluble balls, the pressure comparison is not significant, and the pressure increase after obstruction is not obvious. The effective detection area using soluble balls is small, making it almost impossible to identify casing deformation points where well leakage occurs. Furthermore, during the pumping process, soluble balls cannot achieve sealing of the upper and lower well sections, and the obstruction depth cannot be calculated, indicating technical limitations. Utility Model Content

[0005] To solve at least one of the above technical problems, this utility model provides a rapid detection device for the borehole diameter of bridge-shooting combined wells.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a rapid detection device for the borehole diameter of a bridge-fired well, including a front guide shoe, a core rod, and a cone. The rear end of the front guide shoe is threadedly connected to the front end of the core rod, and the small end of the cone extends forward and is threadedly connected to the rear end of the core rod. The front guide shoe is at least partially cylindrical, and the diameter of the cylindrical part of the front guide shoe is the same as the diameter of the large end of the cone. A pumping cup is fixedly sleeved on the core rod, and the outer diameter of the pumping cup is larger than the diameter of the large end of the cone.

[0007] The beneficial effects of this utility model are: This invention utilizes a method where a front-end guide shoe, a core rod, and a cone are sequentially lowered into the well. A pumping cup seals the wellbore wall against the cone, allowing for pressurized pumping downhole to test the permeability of the corresponding wellbore diameter and determine if a matching fully soluble bridge plug might encounter obstructions. This replaces the traditional method of repeatedly lowering the plug into the well to test its permeability. After testing, the plug can be dissolved using a universal aluminum-magnesium alloy fully soluble tool, reducing engineering complexity and risks, and saving construction costs. Furthermore, the alternating arrangement of the core rod and cone allows for adjustment of their number according to the well type, providing good adaptability. The pumping cup is fixedly fitted onto the core rod, with both ends constrained by the front-end guide shoe and cone, preventing movement and irregular deformation, ensuring reliable sealing.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the rear end of the front guide shoe, the rear end of the core rod, and the rear end of the cone are all provided with internal threaded holes; the front end of the core rod and the front end of the cone are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides.

[0010] The front end of the core rod is connected to the internal threaded hole of the front guide shoe, and the small end of the cone can be connected to the internal threaded hole of the core rod. The internal threaded hole at the rear end of the cone can be used to add a core rod, which avoids the external thread head protruding backward and affecting the passage, and has good compactness.

[0011] Furthermore, the root of the external thread head has a stepped structure, the stepped structure of the core rod abuts against the rear end of the front guide shoe, and the stepped structure of the cone abuts against the rear end of the core rod.

[0012] This ensures that the insertion depth of adjacent components is the same as the design during assembly, resulting in good structural stability.

[0013] Furthermore, the pumping cup is provided with a cup sleeve in the middle, the cup sleeve is fixedly sleeved on the core rod, the front end of the cup sleeve abuts against the rear end of the front guide shoe, and the rear end of the cup sleeve abuts against the stepped structure of the cone.

[0014] Both ends of the pump cup are constrained, which helps to improve the stability of the pump cup, avoids irregular deformation, and ensures good sealing reliability.

[0015] Furthermore, the outer periphery of the core rod is provided with multiple annular protrusions, which are embedded in the inner wall of the cup sleeve.

[0016] The connection strength between the leather cup sleeve and the core rod has been improved, preventing the leather cup sleeve from shifting.

[0017] Furthermore, the leather cup sleeve is bonded to the core rod.

[0018] It facilitates the improvement of the stability of the pump cup and ensures good sealing reliability.

[0019] Furthermore, multiple core rods and cones are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod is threadedly connected to the rear end of the front guide shoe, and the front ends of the remaining core rods are threadedly connected to the rear end of the previous cone.

[0020] It is easy to adjust the number of core rods and cones according to the well type, and has good adaptability.

[0021] Furthermore, the middle part of the front guide shoe is cylindrical, and the two ends of the front guide shoe are conical with a smooth transition between the larger end and the middle part.

[0022] The obtuse angle transition between its conical surface and the central cylindrical surface can prevent scratching and damage to the well casing and improve throughput.

[0023] Furthermore, the inner and outer walls of the pumping cup are both conical, the inner wall of the pumping cup extends along the conical surface of the cone and there is a gap between it and the conical surface of the cone; the outer diameter of the large end of the pumping cup is larger than the diameter of the large end of the cone.

[0024] When the pumping cup is obstructed, it can deform and press the conical surface of the cone to achieve wellbore sealing, which has good reliability.

[0025] Furthermore, the thickness of the pumping cup gradually decreases from the small end to the large end.

[0026] This design allows the pump cup to deform gradually from the edge inwards when obstructed, avoiding irregular deformation and ensuring good stability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model.

[0028] Figure 2 for Figure 1 The right view.

[0029] Figure 3 for Figure 2 A sectional view along the AA direction.

[0030] In the accompanying drawings, the technical features represented by each reference numeral are as follows: 1-Front-end guide shoe; 2-Core rod; 3-Cone; 4-Pumping cup; 5-Cup sleeve; 6-Annular protrusion. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] This utility model refers to Figure 1-3 .

[0033] Example 1: This utility model provides a rapid detection device for the borehole diameter of a bridge-fired well, including a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical part of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly sleeved on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3.

[0034] principle: The front guide shoe 1, core rod 2, and cone 3 are made of fully soluble aluminum-magnesium alloy. Dissolution method: After testing, a common method for dissolving fully soluble aluminum-magnesium alloy tools is used. For example, increasing the salinity of the well fluid near the tool (injecting brine) or decreasing the pH value of the fluid (injecting acid) before and after pumping the tool can improve the dissolution efficiency of the aluminum-magnesium alloy tool. In addition, the pump cup 4 is made of chemically soluble rubber; after testing, dissolution can be achieved by injecting a chemical solvent (such as toluene) into the well casing.

[0035] The diameters of the front guide shoe 1 and cone 3 are slightly smaller than the inner diameter of the well casing, while the outer diameter of the pumping cup 4 is slightly larger than the inner diameter of the well casing. These dimensions can be customized according to different well types in different regions, matching the available slimmed-down bridge plugs (e.g., for a 121mm inner diameter casing, the diameter of the cylindrical part of the front guide shoe 1 and the large end diameter of cone 3 are 98mm, and the outer diameter of pumping cup 4 is 126mm; for a 114mm inner diameter casing, the diameter of the cylindrical part of the front guide shoe 1 and the large end diameter of cone 3 are 85mm, and the outer diameter of pumping cup 4 is 119mm; these dimensions can be customized according to different regions). If the pumping process encounters obstruction, the location of the obstruction can be calculated by collecting pumping flow rate and wellhead pressure data, thus identifying the well casing condition and avoiding the secondary risks associated with repeated attempts by the bridge-perforation team using pressurized perforation tools. For example, the specific process for a 121mm inner diameter casing is as follows: During the bridge-shooting combined operation, if obstruction or jamming occurs: → retrieve the perforation tool string → close the wellhead valve (to isolate the well pressure) → open the valve on the pipe section above the wellhead to deploy this device (the front guide shoe 1 points downwards, the rubber cup contacts the well wall, and when obstructed, it can deform and compress against the conical surface of cone 3, serving to support the well wall and seal the tools for the fluid entering and leaving the well) → after closing the valve on the pipe section above the wellhead, close the wellhead valve again, allowing this device to descend to the 121mm inner diameter casing head position → initiate the fracturing operation process (using a fracturing command vehicle connected to the wellhead, which is existing technology), and propel this device forward using a hydraulic pump at a speed of 0.5m. 3 The pumping displacement is gradually increased to 2m³ / min. 3 / min, maintain for 2m 3 Pumping at a displacement of / min to observe wellhead pressure changes. Methods for observing wellhead pressure changes: 1. Observe the displacement and wellhead pressure data curves collected by the fracturing command vehicle; 2. Accurately collect wellhead pressure change data by installing a high-speed response pressure sensor (accuracy ≥0.2%FS, response time ≤1ms) separately at the wellhead.

[0036] Wellhead pressure changes: ① No significant change in wellhead pressure (the pressure curve suddenly decreases and then stabilizes after pumping in the estimated total fluid volume). Since the outer diameter of this device corresponds to the specifications of the fully soluble bridge plug used in the bridge-jet coupling, the wellhead pressure curve can be used to determine the location of obstruction during the smooth pumping process, and to determine if the matching fully soluble bridge plug can pass through the obstruction location; ② A sudden increase in wellhead pressure (more than 2 MPa) indicates that the device has encountered obstruction, indicating a casing deformation in the wellbore. The matching fully soluble bridge plug will also be unable to pass through the obstruction location. The depth calculation method is: the total fluid volume (m³) required to pump from the start to the pressure increase. 3 ) / Average cross-sectional area of ​​wellbore (m 2 = Depth of obstruction location (m); ③ If there is no significant change in wellhead pressure (when the pumped fluid volume does not reach the expected total fluid volume, the pressure curve suddenly decreases and then tends to stabilize), it is determined that the device is obstructed, and it is determined that the wellbore has undergone casing deformation, and there is leakage at the casing deformation location (such as casing misalignment). The client should be advised to carefully formulate the next construction plan in a timely manner.

[0037] In summary, this invention, by sequentially lowering the front guide shoe 1, core rod 2, and cone 3 into the well, and then sealing the well wall and cone 3 with a pumping cup 4, allows for the use of pressurized wellhead pumps to test the permeability of the corresponding wellbore diameter and determine whether a matching fully soluble bridge plug may encounter obstruction. This replaces the traditional method of repeatedly lowering the plug into the well to test its permeability. After testing, the plug can be dissolved using a universal aluminum-magnesium alloy fully soluble tool, reducing engineering complexity and risk, and saving construction costs. Furthermore, the alternating arrangement of the core rod 2 and cone 3 allows for adjustment of their number according to the well type, providing good adaptability. The pumping cup 4 is fixedly fitted onto the core rod 2, and its ends are constrained by the front guide shoe 1 and cone 3, preventing movement and irregular deformation, ensuring reliable sealing.

[0038] Example 2: An extension based on Example 1, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-fired well, including a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical part of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly sleeved on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3.

[0039] Furthermore, the rear end of the front guide shoe 1, the rear end of the core rod 2, and the rear end of the cone 3 are all provided with internal threaded holes; the front end of the core rod 2 and the front end of the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides.

[0040] During assembly, insert the external threaded end of the core rod 2 into the internal threaded hole at the rear end of the front guide shoe 1 and connect them by thread. Then, insert the external threaded end of the cone 3 into the internal threaded hole at the rear end of the core rod 2 and connect them by thread. This completes the installation. The number of core rods 2 and cones 3 can be set according to requirements. When the number is the same, the last one is cone 3. When the number of core rods 2 is one more than the number of cones 3, the last one is core rod 2. The internal threaded hole at the rear end of the last core rod 2 or cone 3 can be used to add another cone 3 or core rod 2, thereby extending or shortening the overall device, providing good adaptability.

[0041] The front end of the core rod 2 is connected to the internal threaded hole of the front guide shoe 1. The small end of the cone 3 can be connected to the internal threaded hole of the core rod 2. The internal threaded hole at the rear end of the cone 3 can be used to add the core rod 2, which avoids the external thread head protruding backward and affecting the passage, and has good compactness.

[0042] Example 3: An extension based on Example 2, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides.

[0043] Furthermore, the root of the external thread head has a stepped structure, the stepped structure of the core rod 2 abuts against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abuts against the rear end of the core rod 2.

[0044] Note: When there are multiple core rods 2 and cones 3, the stepped structure at the root of the external thread of the first core rod 2 abuts against the rear end of the front guide shoe 1, and the stepped structure at the root of the external thread of the remaining core rods 2 abuts against the rear end of the previous cone 3.

[0045] In addition, the stepped structure at the root of the external thread of the cone 3 abuts against the rear end of the core rod 2; at the same time, the pumping cup 4 can also abut against the stepped structure at the root of the external thread of one of the cones 3 on the side rear side to improve the stability of the pumping cup 4.

[0046] This ensures that the insertion depth of adjacent components is the same as the design during assembly, resulting in good structural stability.

[0047] Example 4: This is an extension based on Example 3, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2.

[0048] Furthermore, the pumping cup 4 is also provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3.

[0049] Note: When there are multiple core rods 2, cones 3 and leather cup sleeves 5, the front end of the first leather cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the front ends of the remaining leather cup sleeves 5 abut against the rear end of the previous cone 3.

[0050] Both ends of the pumping cup 4 are constrained, which helps to improve the stability of the pumping cup 4, avoids its irregular deformation, and ensures good sealing reliability.

[0051] Example 5: An extension based on Example 4, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2. The pumping cup 4 is also provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3.

[0052] Furthermore, the outer periphery of the core rod 2 is provided with a plurality of annular protrusions 6, which are embedded in the inner wall of the leather cup sleeve 5.

[0053] Note: The annular protrusion 6 extends around the outer periphery of the core rod 2, and its cross-section can be rectangular, semi-circular, triangular, or cylindrical.

[0054] This improves the connection strength between the leather cup sleeve 5 and the core rod 2, preventing the leather cup sleeve 5 from shifting.

[0055] Example 6: An extension based on Example 4, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2. The pumping cup 4 is also provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3.

[0056] Furthermore, the leather cup sleeve 5 is bonded to the core rod 2.

[0057] This facilitates the improvement of the stability of the pumping cup 4 and ensures good sealing reliability.

[0058] Preferably, the sleeve 5 and the core rod 2 are integrally vulcanized and bonded.

[0059] Example 7: An extension based on Example 5, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2. The pumping cup 4 is further provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3. The outer periphery of the core rod 2 is provided with a plurality of annular protrusions 6, which are embedded in the inner wall of the cup sleeve 5.

[0060] Furthermore, the leather cup sleeve 5 is bonded to the core rod 2.

[0061] This facilitates the improvement of the stability of the pumping cup 4 and ensures good sealing reliability.

[0062] Preferably, the sleeve 5 and the core rod 2 are integrally vulcanized and bonded.

[0063] Example 8: An extension based on Example 1, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-fired well, including a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical part of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly sleeved on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3.

[0064] Furthermore, multiple core rods 2 and cones 3 are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod 2 is threadedly connected to the rear end of the front guide shoe 1, and the front ends of the remaining core rods 2 are threadedly connected to the rear end of the previous cone 3.

[0065] It is easy to adjust the number of core rods 2 and cones 3 according to the well type, and has good adaptability.

[0066] Example 9: An extension based on Example 2, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides.

[0067] Furthermore, multiple core rods 2 and cones 3 are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod 2 is threadedly connected to the rear end of the front guide shoe 1, and the front ends of the remaining core rods 2 are threadedly connected to the rear end of the previous cone 3.

[0068] It is easy to adjust the number of core rods 2 and cones 3 according to the well type, and has good adaptability.

[0069] Example 10: This is an extension based on Example 3, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2.

[0070] Furthermore, multiple core rods 2 and cones 3 are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod 2 is threadedly connected to the rear end of the front guide shoe 1, and the front ends of the remaining core rods 2 are threadedly connected to the rear end of the previous cone 3.

[0071] It is easy to adjust the number of core rods 2 and cones 3 according to the well type, and has good adaptability.

[0072] Example 11: An extension based on Example 4, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2. The pumping cup 4 is also provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3.

[0073] Furthermore, multiple core rods 2 and cones 3 are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod 2 is threadedly connected to the rear end of the front guide shoe 1, and the front ends of the remaining core rods 2 are threadedly connected to the rear end of the previous cone 3.

[0074] It is easy to adjust the number of core rods 2 and cones 3 according to the well type, and has good adaptability.

[0075] Example 12: An extension based on Example 5, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2. The pumping cup 4 is further provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3. The outer periphery of the core rod 2 is provided with a plurality of annular protrusions 6, which are embedded in the inner wall of the cup sleeve 5.

[0076] Furthermore, multiple core rods 2 and cones 3 are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod 2 is threadedly connected to the rear end of the front guide shoe 1, and the front ends of the remaining core rods 2 are threadedly connected to the rear end of the previous cone 3.

[0077] It is easy to adjust the number of core rods 2 and cones 3 according to the well type, and has good adaptability.

[0078] Example 13: An extension based on Example 6, namely: This utility model provides a rapid detection device for the borehole diameter of a bridge-flying well, comprising a front guide shoe 1, a core rod 2, and a cone 3. The rear end of the front guide shoe 1 is threadedly connected to the front end of the core rod 2. The small end of the cone 3 extends forward and is threadedly connected to the rear end of the core rod 2. The front guide shoe 1 is at least partially cylindrical, and the diameter of the cylindrical portion of the front guide shoe 1 is the same as the diameter of the large end of the cone 3. A pumping cup 4 is fixedly fitted on the core rod 2, and the outer diameter of the pumping cup 4 is larger than the diameter of the large end of the cone 3. The rear ends of the front guide shoe 1, the core rod 2, and the cone 3 are all provided with internal threaded holes. The front ends of the core rod 2 and the cone 3 are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides. The root of the external threaded head has a stepped structure, with the stepped structure of the core rod 2 abutting against the rear end of the front guide shoe 1, and the stepped structure of the cone 3 abutting against the rear end of the core rod 2. The pumping cup 4 is further provided with a cup sleeve 5 in the middle. The cup sleeve 5 is fixedly sleeved on the core rod 2. The front end of the cup sleeve 5 abuts against the rear end of the front guide shoe 1, and the rear end of the cup sleeve 5 abuts against the stepped structure of the cone 3. The cup sleeve 5 is bonded to the core rod 2.

[0079] Furthermore, multiple core rods 2 and cones 3 are provided, and they are alternately distributed in a front-to-back direction; the front end of the first core rod 2 is threadedly connected to the rear end of the front guide shoe 1, and the front ends of the remaining core rods 2 are threadedly connected to the rear end of the previous cone 3.

[0080] It is easy to adjust the number of core rods 2 and cones 3 according to the well type, and has good adaptability.

[0081] Based on the descriptions and extensions of embodiments one to thirteen above, and by integrating other improvements / extensions with any embodiment, even more embodiments can be derived. All embodiments should be understood as technical solutions contributed by this utility model.

[0082] For example, the following improvements or extensions can be made: Furthermore, the middle part of the front guide shoe 1 is cylindrical, and the two ends of the front guide shoe 1 are conical with a smooth transition between the larger end and the middle part.

[0083] The obtuse angle transition between its conical surface and the central cylindrical surface can prevent scratching and damage to the well casing and improve throughput.

[0084] Furthermore, the inner and outer walls of the pumping cup 4 are both conical, the inner wall of the pumping cup 4 extends along the conical surface of the cone 3 and there is a gap between it and the conical surface of the cone 3; the outer diameter of the large end of the pumping cup 4 is larger than the diameter of the large end of the cone 3.

[0085] When the pumping cup 4 is obstructed, it can deform and press the conical surface of the cone 3 to achieve wellbore sealing, which has good reliability.

[0086] Furthermore, the thickness of the pumping cup 4 gradually decreases from the small end to the large end.

[0087] This causes the pump cup 4 to deform gradually from the edge inwards when obstructed, avoiding irregular deformation and ensuring good stability.

[0088] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0089] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0091] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0092] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A rapid detection device for the borehole diameter of a bridge-shooting combined operation well, characterized in that: The device includes a front guide shoe (1), a core rod (2), and a cone (3). The rear end of the front guide shoe (1) is connected to the front end of the core rod (2) by a thread. The small end of the cone (3) extends forward and is connected to the rear end of the core rod (2) by a thread. The front guide shoe (1) is at least partially cylindrical, and the diameter of the cylindrical part of the front guide shoe (1) is the same as the diameter of the large end of the cone (3). A pumping cup (4) is fixedly sleeved on the core rod (2), and the outer diameter of the pumping cup (4) is larger than the diameter of the large end of the cone (3).

2. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 1, characterized in that: The rear end of the front guide shoe (1), the rear end of the core rod (2) and the rear end of the cone (3) are all provided with internal threaded holes; the front end of the core rod (2) and the front end of the cone (3) are all provided with external threaded heads, which are connected to the corresponding internal threaded holes on their front sides.

3. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 2, characterized in that: The root of the external thread head has a stepped structure. The stepped structure of the core rod (2) abuts against the rear end of the front guide shoe (1), and the stepped structure of the cone (3) abuts against the rear end of the core rod (2).

4. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 3, characterized in that: The pumping cup (4) is also provided with a cup sleeve (5) in the middle. The cup sleeve (5) is fixedly sleeved on the core rod (2). The front end of the cup sleeve (5) abuts against the rear end of the front guide shoe (1), and the rear end of the cup sleeve (5) abuts against the stepped structure of the cone (3).

5. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 4, characterized in that: The outer periphery of the core rod (2) is provided with multiple annular protrusions (6), which are embedded in the inner wall of the leather cup sleeve (5).

6. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 5, characterized in that: The leather cup sleeve (5) is bonded to the core rod (2).

7. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to any one of claims 1-6, characterized in that: Multiple core rods (2) and cones (3) are provided and are alternately distributed in a front-to-back direction; the front end of the first core rod (2) is threaded to the rear end of the front guide shoe (1), and the front ends of the remaining core rods (2) are threaded to the rear end of the previous cone (3).

8. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 1, characterized in that: The middle part of the front guide shoe (1) is cylindrical, and the two ends of the front guide shoe (1) are conical with the large end smoothly transitioning to the middle part.

9. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 1, characterized in that: The inner and outer walls of the pumping cup (4) are both conical. The inner wall of the pumping cup (4) extends along the conical surface of the cone (3) and there is a gap between it and the conical surface of the cone (3). The outer diameter of the large end of the pumping cup (4) is larger than the diameter of the large end of the cone (3).

10. The rapid detection device for wellbore diameter in bridge-shooting combined operation according to claim 9, characterized in that: The thickness of the pumping cup (4) gradually decreases from the small end to the large end.

Images