Two-stage basket type returnable overshot
By designing a two-stage retractable basket retrieval cylinder and employing structures such as joints, guide shoes, control rings, and inner guide cones, the problem of the single retrieval method in existing retrieval cylinders is solved. This enables dual-stage retrieval of the oil pipe and coupling, reducing costs and improving operational flexibility.
Patent Information
- Application Number
- CN202520589866.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing retrieval tools require different tools when retrieving oil pipes and couplings, which increases retrieval costs.
A two-stage, retractable retrieval cylinder is designed, employing a joint, guide shoe, upper control ring, inner guide cone, tubing slips, and coupling slips. It is connected via a snap-fit method, and the control ring and inner guide cone are used to guide and lock the tubing and coupling, supporting double-click retrieval.
It achieves double-click retrieval of the oil pipe and coupling, reducing retrieval costs and allowing for safe withdrawal from the retrieval cylinder when encountering obstacles.
Smart Images
Figure CN223767465U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of scooping tube technology, specifically a two-stage retractable scooping tube. Background Technology
[0002] A retrieval tube is a specialized tool used in oil or gas drilling to retrieve tools, equipment, or other objects that have fallen or been left behind in the wellbore. Retrieval tubes come in a variety of designs and types, and it is important to select the appropriate retrieval tube based on different well conditions and the object to be retrieved.
[0003] However, existing retrieval cylinders offer only one retrieval method, requiring different tools when retrieving oil pipes and couplings, thus increasing retrieval costs. Therefore, we propose a two-stage, retractable basket-type retrieval cylinder to solve the aforementioned problems. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a two-stage retractable basket retrieval cylinder, which solves the problem of a single retrieval method, requiring different tools when retrieving oil pipes and couplings, thus increasing retrieval costs.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a double-stage retractable basket scooping tube, comprising a body, a connector at one end of the body, a guide shoe at the other end of the body, an upper control ring at one end of the inner cavity of the body and an inner guide cone at the middle of the inner cavity of the body;
[0006] An oil pipe slip is provided in the inner cavity of the body between the inner guide cone and the upper control ring. A lower control ring is provided in the inner cavity of the body at one end of the guide shoe. A coupling slip is provided in the inner cavity of the body between the inner guide cone and the lower control ring. Spiral conical surfaces for guiding the oil pipe slip and the coupling slip are respectively opened on both sides of the inner cavity of the body.
[0007] Preferably, both ends of the main body are connected to the connector and the guide shoe by threaded connection.
[0008] Preferably, the right-view outer diameter of the main body is the same as the right-view outer diameter of the connector and the guide shoe.
[0009] Beneficial effects
[0010] This invention provides a two-stage, retractable basket-type scooping cylinder. Compared with the prior art, it has the following advantages:
[0011] This dual-stage, retractable basket-type retrieval cylinder uses a snap-fit connection to connect both ends of the main body to the connector and the guide shoe, respectively. An upper control ring controls the tubing slips to prevent rotation, and a lower control ring controls the coupling slips to prevent rotation. The inner guide cone guides the tubing into the tubing slips, while the guide shoe moves the fish head into the retrieval cylinder cavity. During retrieval, the fish head is first guided into the coupling slips by the guide shoe, then the retrieval cylinder continues to descend, and the inner guide cone guides the tubing slips. Finally, the retrieval cylinder is lifted... This causes the tubing slips to lock onto the top of the fish. Then, under the action of the spiral conical surface of the main body, the tubing slips contract and tightly lock the top of the fish, allowing the tubing to be lifted out. If the fish top cannot be retrieved or lifted due to prolonged obstruction, the retrieval cylinder can be rotated in the opposite direction. The slips will then exit the top of the fish through the retrieval spiral teeth, allowing the retrieval cylinder to be safely removed. When the tubing on the top of the fish is severely corroded or cannot be locked, the retrieval cylinder can be lowered to the coupling. The coupling slips lock onto the coupling and lift the retrieval cylinder, achieving a double-click retrieval effect. The retrieval process is the same as the process of retrieving the tubing and the top of the fish. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.
[0013] In the diagram: 1. Body; 2. Connector; 3. Guide shoe; 4. Upper control ring; 5. Oil pipe slip; 6. Inner guide cone; 7. Coupling slip; 8. Lower control ring. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1 This utility model provides a technical solution: a double-stage retractable basket scoop, including a body 1, a connector 2 at one end of the body 1, a guide shoe 3 at the other end of the body 1, an upper control ring 4 at one end of the inner cavity of the body 1 located at the connector 2, an inner guide cone 6 at the middle of the inner cavity of the body 1; an oil pipe slip 5 at the inner cavity of the body 1 located between the inner guide cone 6 and the upper control ring 4, a lower control ring 8 at one end of the inner cavity of the body 1 located between the guide shoe 3, and a coupling slip 7 at the inner cavity of the body 1 located between the inner guide cone 6 and the lower control ring 8; spiral conical surfaces for guiding the oil pipe slip 5 and the coupling slip 7 are respectively opened on both sides of the inner cavity of the body 1; both ends of the body 1 are connected to the connector 2 and the guide shoe 3 by threaded connection.
[0016] The two ends of the main body 1 can be connected to the connector 2 and the guide shoe 3 respectively through a snap-fit connection. The upper control ring 4 controls the oil pipe slip 5 to prevent rotation, and the lower control ring 8 controls the coupling slip 7 to prevent rotation. Then, the inner guide cone 6 guides the oil pipe into the oil pipe slip 5, and the guide shoe 3 moves the fish head into the retrieval cylinder cavity. During retrieval, the fish head is first guided into the coupling slip 7 by the guide shoe 3, then the retrieval cylinder continues to lower, and the inner guide cone 6 guides the oil pipe slip 5 in. Finally, the retrieval cylinder is lifted... This causes the tubing slip 5 to lock onto the top of the fish. Then, under the action of the spiral conical surface of the body 1, the tubing slip 5 contracts and tightly locks the top of the fish, allowing the tubing to be lifted out. If the fish top cannot be retrieved or lifted due to prolonged obstruction, the retrieval cylinder can be rotated in the opposite direction. The slip will then exit the top of the fish through the retrieval spiral teeth, allowing the retrieval cylinder to be safely removed. When the tubing on the top of the fish is severely corroded or cannot be locked, the retrieval cylinder can be lowered to the coupling. The coupling slip 7 locks onto the coupling and lifts the retrieval cylinder, achieving a double-click retrieval effect. The retrieval process is the same as the process of retrieving the tubing and the top of the fish.
[0017] See Figure 1 The right-view outer diameter of the main body 1 is the same as the right-view outer diameter of the connector 2 and the guide shoe 3.
[0018] During operation, the two ends of the main body 1 can be connected to the connector 2 and the guide shoe 3 respectively via a snap-fit connection. The upper control ring 4 controls the oil pipe slip 5 to prevent rotation, and the lower control ring 8 controls the coupling slip 7 to prevent rotation. Then, the inner guide cone 6 guides the oil pipe into the oil pipe slip 5, and the guide shoe 3 moves the fish head into the retrieval cylinder cavity. During retrieval, the fish head is first guided into the coupling slip 7 by the guide shoe 3, then the retrieval cylinder continues to descend, and the inner guide cone 6 guides the oil pipe slip 5 in. Finally, the retrieval cylinder is lifted upwards... The cylinder, which in turn causes the tubing slip 5 to lock onto the top of the fish, and then, under the action of the spiral conical surface of the body 1, the tubing slip 5 contracts and tightly locks the top of the fish, allowing the tubing to be lifted out. If the fish top cannot be retrieved or lifted due to long-term obstruction, the retrieval cylinder can be rotated in the opposite direction, and the slip will exit the top of the fish through the retrieval spiral teeth, allowing the retrieval cylinder to be safely removed. When the tubing on the top of the fish is severely corroded or cannot be locked, the retrieval cylinder can be lowered to the coupling, and the coupling slip 7 locks onto the coupling and lifts the retrieval cylinder, achieving a double-click retrieval effect. The retrieval process is the same as the process of retrieval the tubing and the top of the fish.
[0019] In summary, after the retrieval tube is lowered into the well to the top of the fish-shaped part, the tubing can be retrieved, the coupling can be retrieved, and both the tubing and the coupling can be retrieved simultaneously. If the retrieval is obstructed, the device can be safely withdrawn.
[0020] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.
Claims
1. A two-stage blue type, retrievable barrel comprising a body (1), characterized in that: One end of the body (1) is provided with a joint (2), the other end of the body (1) is provided with a leading shoe (3), the inner cavity of the body (1) and one end of the joint (2) is provided with an upper control ring (4), the middle of the inner cavity of the body (1) is provided with an inner leading cone (6); The inner cavity of the body (1) and between the inner leading cone (6) and the upper control ring (4) is provided with an oil pipe slip (5), the inner cavity of the body (1) and one end of the leading shoe (3) is provided with a lower control ring (8), the inner cavity of the body (1) and between the inner leading cone (6) and the lower control ring (8) is provided with a coupling slip (7), the inner cavity of the body (1) is respectively provided with a spiral conical surface for guiding the oil pipe slip (5) and the coupling slip (7) on both sides.
2. A two-stage blue-type recoverable barrel according to claim 1, characterized in that: Both ends of the body (1) are connected with the joint (2) and the leading shoe (3) in the form of screw connection.
3. A dual-stage blue-type recoverable barrel according to claim 1, characterized in that: The right view outer diameter of the body (1) is the same as the right view outer diameter of the joint (2) and the leading shoe (3).