Full-hydraulic bidirectional jar for high-energy coiled tubing

Abstract

The utility model relates to the technical field of drilling tools, in particular to a full-hydraulic bidirectional jar for a high-energy coiled tubing, which comprises a wash pipe assembly, a cone valve, a pressure energy shell and a transmission assembly, the wash pipe assembly comprises a wash pipe, a wash pipe shell and a first lip-shaped sealing component arranged in the wash pipe shell; the cone valve and pressure energy shell comprises a first cone valve, a second cone valve and a pressure energy shell; the transmission assembly comprises a spline punching shaft, a spline shell and a pressure regulating ring; the first cone valve and the second cone valve are fixed to the spline punching shaft through the first sealing ring and the second sealing ring respectively, the spline punching shaft is connected with the pressure energy shell in a matched mode through a spline, and the pressure adjusting ring is arranged in an axial adjusting groove of the spline punching shaft in a sleeved mode. By means of the full-hydraulic two-way jarring structural design, two-way controllable jarring under the lifting and pressing working conditions is achieved, and the limitation of a traditional one-way jar is solved.

Description

Technical Field

[0001] This utility model relates to the field of drilling tool technology, and in particular to a high-energy coiled tubing fully hydraulic bidirectional shock absorber. Background Technology

[0002] In coiled tubing drilling operations, wellbore blockage and stuck pipe incidents occur frequently. Traditional unsticking methods mainly involve applying axial load by lifting or lowering the tubing string, or using shovels to generate impact force. However, coiled tubing is characterized by its small diameter (typically ≤4 inches) and relatively soft material (yield strength approximately 550 MPa). When the required lifting force exceeds 80% of its yield strength, direct lifting may cause the tubing string to break. Therefore, shovels are needed to assist in unsticking.

[0003] Currently, mainstream shock tools suffer from the following technical bottlenecks:

[0004] 1. Limitations of unidirectional shock: Traditional unidirectional shockers can only be activated by lifting, and cannot achieve downward shock, which limits the flexibility of card release in complex working conditions.

[0005] 2. Insufficient sealing reliability: Existing bidirectional hydraulic shock absorbers generally use rubber seals. Under the high temperature (≥150℃) environment at the bottom of the well and high frequency reciprocating motion, the sealing elements are prone to wear and failure, resulting in hydraulic oil leakage, and the reduction or even complete loss of shock force.

[0006] 3. Poor shock stability: Hydraulic high-frequency shockers rely on spring energy storage structures, which have problems such as spring fatigue fracture and large shock force fluctuations. In addition, the combination of multiple springs leads to high structural complexity and difficult maintenance.

[0007] 4. Uncontrollable impact force: The impact intensity of existing tools depends on the elastic deformation of the drill string, which is difficult to adjust precisely through ground operation, affecting the efficiency of unblocking. Utility Model Content

[0008] In order to effectively solve the problems in the background art, this utility model proposes a high-energy continuous tubing fully hydraulic bidirectional shock absorber.

[0009] The specific technical solution is as follows:

[0010] A high-energy coiled tubing fully hydraulic bidirectional shock absorber includes a punching assembly, a cone valve and a pressure energy housing, and a transmission assembly. The punching assembly includes a punch, a punch housing, and a first lip seal assembly disposed within the punch housing. The cone valve and pressure energy housing include a first cone valve, a second cone valve, and a pressure energy housing. The transmission assembly includes a spline punch shaft, a spline housing, and a pressure regulating ring. The first cone valve and the second cone valve are respectively fixed to the spline punch shaft via a first sealing ring and a second sealing ring. The spline punch shaft and the pressure energy housing are connected via a spline connection. The pressure regulating ring is fitted into the axial adjustment groove of the spline punch shaft.

[0011] Preferably, the punch tube housing and the pressure energy housing are sealed by a first O-ring and a second O-ring, the punch tube and the spline punch shaft are connected by threads, and a third O-ring is provided inside the punch tube.

[0012] Preferably, a first high-pressure O-ring and a second high-pressure O-ring are respectively provided inside the first sealing ring and the second sealing ring, and the first sealing ring and the second sealing ring are connected to the spline punch shaft by interference fit.

[0013] Preferably, the spline housing is provided with a first double O-ring and a second double O-ring, the spline housing is connected to the pressure energy housing by a flange, and the spline punch and the spline housing transmit torque through the spline.

[0014] Preferably, the upper sealing joint is provided with a second lip sealing component and a fourth O-ring seal inside, the upper sealing joint is connected to the spline housing by a thread, and the upper joint is connected to the spline punch shaft by a thread and is provided with a fifth O-ring seal.

[0015] Preferably, the inner wall of the pressure energy housing is provided with an annular hydraulic oil chamber, and the first cone valve and the second cone valve realize the storage and release of energy for upward and downward impacts respectively through the hydraulic oil chamber. The pressure regulating ring controls the magnitude of the impact force by adjusting the axial displacement of the spline punch shaft.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: This utility model, through its fully hydraulic bidirectional shock structure design, achieves bidirectional controllable shock under both lifting and pressing conditions, overcoming the limitations of traditional unidirectional shockers; the use of a high-pressure sealing structure (a combination of double O-ring seals and lip seal components) and alloy cone valve material significantly improves sealing reliability and wear resistance under high temperature and high pressure environments, avoiding shock force attenuation caused by hydraulic oil leakage; the innovative spline transmission design transfers the stress concentration area from the shock component to the spline housing, effectively improving torque bearing capacity and extending service life; the shock force can be precisely adjusted via the pressure regulating ring to adapt to different unblocking requirements; it can also be used in conjunction with an accelerator to further enhance the shock effect, providing efficient and stable technical support for continuous tubing unblocking operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0018] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings and preferred embodiments. Figure 1 As shown, this high-energy coiled tubing fully hydraulic bidirectional shock absorber mainly consists of three parts: a tubing assembly, a cone valve and pressure energy housing, and a transmission assembly. The tubing assembly is responsible for connecting to the external tubing and providing partial sealing; the cone valve and pressure energy housing are key components for storing and releasing shock energy; and the transmission assembly is used to transmit torque and control the magnitude of the shock force.

[0020] The punch assembly includes a punch 11, a punch housing 13, and a first lip seal assembly 15 disposed within the punch housing. A third O-ring 17 is provided inside the punch 11 to further seal the internal passage of the punch. The punch 11 is threadedly connected to the splined punch shaft 2 to ensure connection stability and sealing. The punch housing 13 and the pressure energy housing 12 are sealed together by a first O-ring 14 and a second O-ring 16 to prevent hydraulic oil leakage. This multi-seal structure design effectively adapts to different working environments and improves sealing reliability.

[0021] The cone valve and pressure energy housing include a first cone valve 8, a second cone valve 9, and a pressure energy housing 12. The first cone valve 8 and the second cone valve 9 are fixed to the splined punch shaft 2 by a first sealing ring 7 and a second sealing ring 10, respectively. A first high-pressure O-ring 19 and a second high-pressure O-ring 18 are respectively installed inside the first sealing ring 7 and the second sealing ring 10, and they are connected to the splined punch shaft 2 by an interference fit, ensuring the tightness and sealing of the connection between the cone valve and the splined punch shaft. An annular hydraulic oil chamber is provided on the inner wall of the pressure energy housing 12, through which the first cone valve 8 and the second cone valve 9 respectively realize the storage and release of energy during upward and downward impacts.

[0022] The transmission assembly includes a splined punch 2, a splined housing 5, and a pressure regulating ring 6. The splined punch 2 and the pressure housing 12 are connected via a spline joint to transmit torque. The splined housing 5 contains a first double O-ring seal 20 and a second double O-ring seal 21 to further enhance sealing performance. The splined housing 5 and the pressure housing 12 are connected via a flange to ensure a secure connection. The pressure regulating ring 6 is fitted into the axial adjustment groove of the splined punch 2, controlling the impact force by adjusting the axial displacement of the splined punch 2. The upper sealing joint 3 contains a second lip seal assembly 24 and a fourth O-ring seal 23. The upper sealing joint 3 is threadedly connected to the splined housing 5, and the upper joint 1 is threadedly connected to the splined punch 2 and contains a fifth O-ring seal 25, ensuring the sealing and stability of the entire transmission system.

[0023] Working principle

[0024] Up click process

[0025] When an upward impact operation is required, the continuous hydraulic hose is lifted by the ground equipment, causing the splined punch 2 to move upward. At this time, the first cone valve 8 gradually closes under the action of hydraulic oil, and the hydraulic oil forms high pressure in the annular hydraulic oil chamber, storing shock energy. When the set upward impact force threshold is reached, the first cone valve 8 opens instantaneously, and the stored hydraulic energy is rapidly released, pushing the splined punch 2 to impact upward quickly, realizing the upward impact release function.

[0026] Downward movement

[0027] During the downward impact operation, the ground equipment presses down the continuous hydraulic hose, causing the splined punch 2 to move downwards. The second cone valve 9 closes under the action of hydraulic oil, and the hydraulic oil accumulates pressure and stores energy in the annular hydraulic oil chamber. When the impact force requirement is met, the second cone valve 9 opens, and the hydraulic energy pushes the splined punch 2 downwards to complete the downward impact and release action.

[0028] Shock force adjustment

[0029] The operator can change the axial displacement of the spline punch 2 by adjusting the position of the pressure regulating ring 6 within the axial adjustment groove of the spline punch 2. The change in axial displacement affects the pressure and flow rate of the hydraulic oil in the annular hydraulic oil chamber, thereby achieving precise control over the magnitude of the impact force to adapt to different unblocking conditions.

[0030] This high-energy coiled tubing fully hydraulic bidirectional shock absorber achieves bidirectional controllable shock absorption through a unique structural design and sealing measures, improving its ability to unblock devices under complex working conditions. Multiple sealing structures ensure sealing reliability under high temperature and high pressure environments, avoiding shock force attenuation caused by hydraulic oil leakage. The spline drive design improves torque transmission capability and structural stability, extending the equipment's service life. Simultaneously, the adjustable shock force allows the equipment to better adapt to different unblocking needs, improving operational efficiency and safety.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-energy coiled tubing full hydraulic bidirectional jar, characterized in that: The application relates to a shock pipe assembly, a cone valve and a pressure energy shell, a transmission assembly, the shock pipe assembly comprising a shock pipe (11), a shock pipe shell (13) and a first lip-shaped sealing assembly (15) arranged in the shock pipe shell; the cone valve and the pressure energy shell comprise a first cone valve (8), a second cone valve (9) and a pressure energy shell (12); the transmission assembly comprises a spline shock shaft (2), a spline shell (5) and a pressure regulating ring (6); the first cone valve (8) and the second cone valve (9) are fixed on the spline shock shaft (2) through a first sealing ring (7) and a second sealing ring (10) respectively, the spline shock shaft (2) is connected with the pressure energy shell (12) through spline cooperation, and the pressure regulating ring (6) is sleeved in an axial adjusting groove of the spline shock shaft (2).

2. The high-energy coiled tubing hydraulic full- flow reverse jet bumper of claim 1, wherein: The shock pipe shell (13) and the pressure energy shell (12) are sealed through a first O-shaped sealing ring (14) and a second O-shaped sealing ring (16), the shock pipe (11) is connected with the spline shock shaft (2) through threads, and a third O-shaped sealing ring (17) is arranged in the shock pipe (11).

3. The high-energy coiled tubing hydraulic bidirectional jar according to claim 1, characterized in that: First and second high-pressure O-shaped sealing rings (19) and (18) are arranged in the first and second sealing rings (7) and (10) respectively, and the first and second sealing rings (7) and (10) are connected with the spline shock shaft (2) through interference fit.

4. The high-energy coiled tubing hydraulic full- flow reverse jet bumper of claim 1, wherein: First and second double O-shaped sealing rings (20) and (21) are arranged in the spline shell (5), the spline shell (5) is connected with the pressure energy shell (12) through flanges, and the spline shock shaft (2) and the spline shell (5) transmit torque through splines.

5. The high-energy coiled tubing hydraulic bidirectional jar according to claim 1, characterized in that: A second lip-shaped sealing assembly (24) and a fourth O-shaped sealing ring (23) are arranged in the upper sealing joint (3), the upper sealing joint (3) is connected with the spline shell (5) through threads, the upper joint (1) is connected with the spline shock shaft (2) through threads and a fifth O-shaped sealing ring (25) is arranged.

6. The high-energy coiled tubing hydraulic bidirectional jar of claim 1, wherein: An annular hydraulic oil cavity is arranged on the inner wall of the pressure energy shell (12), the first and second cone valves (8) and (9) are respectively connected with the hydraulic oil cavity to realize energy storage and release of upper and lower striking, and the pressure regulating ring (6) controls the striking force by adjusting the axial displacement of the spline shock shaft (2).

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