Clamping device for taking flange backing ring from out-of-control oil and gas well

Abstract

The utility model provides a clamping device for taking out a flange backing ring from an out-of-control oil-gas well, the clamping device for taking out the flange backing ring from the out-of-control oil-gas well comprises a clamping ring, an anti-skidding slip and an anti-flying skirt edge, the clamping ring comprises a clamping ring main body and an annular part, the clamping ring main body comprises a vertical rod part and a transverse rod part which are vertically connected, the annular part is connected with the cross rod part; the anti-flying skirt edge is arranged on the annular part; the anti-skid slips are arranged on the inner wall of the annular part. The clamping device has the advantages that mechanical stable clamping of the flange backing ring can be effectively achieved, the success rate of flange backing ring taking operation of an out-of-control oil and gas well is increased, the operation risk of rescue personnel near a well mouth is reduced, and the rescue progress of the out-of-control well is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas well rescue operations, and in particular to a clamping device for removing flange gaskets from out-of-control oil and gas wells. Background Art

[0002] Uncontrolled blowouts are catastrophic events in the oil and gas industry, particularly in high-pressure, high-yield, and high-sulfur wells. The complex rescue environment poses significant challenges to rescue technology, equipment, and the safety of operators. Currently, common well control rescue procedures both domestically and internationally include hazard reconnaissance, cooling and shielding, clearing obstructions near the wellhead, cutting wellhead debris, reconstructing the wellhead, and killing the well. Reconstructing the wellhead is crucial for successful recovery, and safely and quickly removing the old flange gasket is crucial. Wellheads are typically connected by flanges and rely on flange gaskets for sealing. However, after an uncontrolled blowout, the old flange gaskets, damaged by plastic deformation and erosion from the wellbore's jet fluid, become unsuitable for use in the new wellhead assembly and must be replaced before a new wellhead can be reconstructed. Currently, removal of the old flange gaskets typically involves prying with hand tools or manually grasping, a highly risky operation.

[0003] In the process of rescuing a blowout, an important prerequisite for resetting the new wellhead is to remove the BX flange gasket from the old wellhead flange gasket groove. The existing technical means have the following problems: (1) The lifting force when using hand tools to lift the flange gasket to expose the gap, and the shearing force when using a shear to cut the flange gasket are difficult to control, which can easily cause the flange gasket to come into contact with the airflow, causing the sealing flange gasket to fly out, resulting in personal injury or equipment damage. (2) When the flange gasket cuts the airflow under the action of the impact force, if there is no effective clamping control tool, it is very easy to fly out and hit the equipment or obstacles, generating sparks and causing flash fire. Therefore, it is of great significance to provide a clamping device for removing flange gaskets from uncontrolled oil and gas wells.

[0004] A Chinese patent application numbered "CN202021355597.9" and titled "A Clamping Device for Flange Processing" discloses a clamping device for flange processing. The device comprises a fixed base, wherein an electric push rod is fixed to the center of the upper end of the fixed base via a motor fixing frame, and support fixing rods fixed to the fixed base are provided on both sides of the electric push rod. One end of the support fixing rod is inserted through a through hole provided on a first fixed cylinder and connected to a second fixed cylinder, and the second fixed cylinder is configured as a bottle cap-shaped structure. The lower end of the first fixed cylinder is fixedly connected to the telescopic shaft of the electric push rod, and the first fixed cylinder is configured as a hollow frustum-shaped structure with an opening, and the second fixed cylinder is uniformly provided with annular through holes. The clamping device for flange processing is provided with an electric push rod, which acts on the connecting rod and the flange through the first fixed cylinder to form a clamping structure. This structure is convenient and flexible to operate, can provide the flange with a more uniform clamping force, and makes the clamping state of the flange more stable, providing sufficient equipment conditions for the flange processing operation. However, the structure of this device is different from that of the present application. Utility Model Content

[0005] In response to the shortcomings of the prior art, the present invention aims to address one or more of the problems in the prior art. For example, one of the objectives of the present invention is to provide a clamping device for removing flange gaskets from uncontrolled oil and gas wells that can effectively achieve mechanically stable clamping of flange gaskets, improve the success rate of flange gasket removal operations in uncontrolled oil and gas wells, reduce the operational risks for near-wellhead rescue personnel, and accelerate the rescue process of uncontrolled wells.

[0006] In order to achieve the above-mentioned purpose, the utility model provides, on the one hand, a clamping device for removing flange gaskets from uncontrolled oil and gas wells, wherein the clamping device may include a clamping ring, anti-slip slips and an anti-flying skirt, wherein the clamping ring includes a clamping ring body and an annular portion, the clamping ring body includes a vertical rod portion and a horizontal rod portion connected vertically, and the annular portion is connected to the horizontal rod portion; the anti-flying skirt is arranged on the annular portion; and the anti-slip slips are arranged on the inner wall of the annular portion.

[0007] In one or more exemplary embodiments of an aspect of the present invention, the annular portion may be in a shape of one-third of a circle.

[0008] In one or more exemplary embodiments of one aspect of the present invention, a stepped surface may be provided on the annular portion to connect the anti-flying skirt.

[0009] In one or more exemplary embodiments of one aspect of the present invention, a reinforcing rib plate may be provided on the clamping ring body, and the reinforcing rib plate is located between the right angle formed by the vertical rod portion and the horizontal rod portion.

[0010] In one or more exemplary embodiments of an aspect of the present invention, the reinforcing rib plate may be connected to the clamping ring body by welding.

[0011] In one or more exemplary embodiments of an aspect of the present invention, a padding pin hole may be provided on the annular portion for connecting pins of different lengths.

[0012] In one or more exemplary embodiments of an aspect of the present invention, the spacer pin holes may be evenly distributed on the annular portion.

[0013] In one or more exemplary embodiments of one aspect of the present invention, a design value of the pitch circle diameter of the pad-up pin hole may be 5 to 8 mm larger than the BX flange step diameter.

[0014] In one or more exemplary embodiments of an aspect of the present invention, the clamping device may further include a connecting plate connected to the crossbar portion.

[0015] In one or more exemplary embodiments of an aspect of the present invention, a remote-controlled implement arm may be connected to the connection plate.

[0016] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0017] (1) The clamping device for removing flange gaskets from uncontrolled oil and gas wells proposed in the present invention can safely and quickly remove old flange gaskets.

[0018] (2) Using the clamping device of the present invention to remove flange gaskets can improve the success rate of flange gasket removal operations in uncontrolled oil and gas wells, reduce the operating risks of rescue personnel near the wellhead, and speed up the rescue process of uncontrolled wells.

[0019] (3) The clamping device of the present invention can achieve mechanically stable clamping of the flange gasket by connecting with a remote control machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects and features of the present invention will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0021] Figure 1 A schematic top view of a clamping device for removing a flange gasket from an uncontrolled oil and gas well according to an exemplary embodiment of the present invention is shown;

[0022] Figure 2 A front view schematic diagram of a clamping device for removing a flange gasket from an uncontrolled oil and gas well according to an exemplary embodiment of the present invention is shown;

[0023] Figure 3 Shows a schematic structural diagram of the anti-flying skirt of the utility model;

[0024] Figure 4A partial cross-sectional structural diagram of the annular portion of the clamping ring of the present invention is shown.

[0025] Description of main reference numerals:

[0026] 1- Pad height pin hole, 2- Step plane, 3- Clamping ring, 4- Connecting plate, 5- Reinforcement rib plate, 6- Anti-slip slip, 7- Anti-fly skirt. DETAILED DESCRIPTION

[0027] Hereinafter, a clamping device for removing a flange gasket from an uncontrolled oil and gas well according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0028] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" and "several" mean two or more. In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Exemplary embodiment 1

[0030] This exemplary embodiment provides a clamping device for removing a flange gasket from an uncontrolled oil and gas well.

[0031] Figure 1 A schematic top view of a clamping device for removing a flange gasket from an uncontrolled oil and gas well according to an exemplary embodiment of the present invention is shown; Figure 2 A front view schematic diagram of a clamping device for removing a flange gasket from an uncontrolled oil and gas well according to an exemplary embodiment of the present invention is shown; Figure 3 Shows a schematic structural diagram of the anti-flying skirt of the utility model; Figure 4 The schematic diagram of the partial cross-section structure of the annular portion of the clamping ring of the present invention is shown below. Figures 1 to 4 The clamping device for removing a flange gasket from an uncontrolled oil and gas well according to this exemplary embodiment will be described.

[0032] like Figures 1 to 4As shown in FIG, the clamping device for removing the flange gasket of an uncontrolled oil and gas well may include a clamping ring 3, anti-slip slips 6 and an anti-flying skirt 7.

[0033] Among them, the clamping ring 3 is the main structure for clamping the flange gasket. When the left and right clamping rings are used in combination, direct cutting of the airflow can be avoided when probing into the clamping position. The clamping ring 3 may include a clamping ring body and an annular portion. The clamping ring body may include a vertical rod portion and a horizontal rod portion vertically connected to each other. One end of the annular portion is connected to one end of the horizontal rod portion, and the angle between the vertical rod portion and the horizontal rod portion is a right angle. The anti-flying skirt 7 is installed on the annular portion to limit the flange gasket and prevent it from flying out due to the impact of the cutting airflow when the flange gasket is taken out. The anti-slip cava 6 is arranged on the inner wall (inside) of the annular portion to prevent the flange gasket from moving up and down.

[0034] In this exemplary embodiment, the annular portion may be in the shape of one-third of a circle.

[0035] In this exemplary embodiment, a stepped surface 2 may be provided on the annular portion for connecting the anti-flying skirt 7 .

[0036] In this exemplary embodiment, the clamping ring body may be provided with a reinforcing rib 5. The reinforcing rib is located between the right angle formed by the vertical rod portion and the horizontal rod portion.

[0037] Furthermore, the reinforcing rib plate can be connected to the clamping ring body by welding, which can enhance the structural strength of the clamping ring and prevent the flange gasket from being deformed due to the impact of the cutting airflow when the flange gasket is removed.

[0038] In this exemplary embodiment, a raised pin hole 1 may be provided on the annular portion for connecting pins of different lengths to prevent the clamping device from directly clamping to the flange step.

[0039] Furthermore, the padding pin holes may be evenly distributed on the annular portion.

[0040] In this exemplary embodiment, the pitch circle diameter of the spacer pin hole may be designed to be 5 to 8 mm larger than the BX flange step diameter, such as 5 mm, 6 mm, 7 mm, or 8 mm.

[0041] In this exemplary embodiment, the clamping device may further include a connecting plate 4. The connecting plate is horizontally connected to the crossbar portion. Here, the connecting plate may be integrated with the clamping ring.

[0042] In this exemplary embodiment, a connecting plate can be used to connect to a feeding tool. The connecting plate can be designed in a variety of shapes and sizes, allowing it to connect to various tools with multi-degree-of-freedom robotic arms, thus providing a wide range of applications. The clamping device can be locked by applying pressure to the tool via remote control.

[0043] The specific operation steps of using the clamping device for removing flange gaskets from uncontrolled oil and gas wells of the present invention to remove flange sealing gaskets under strong airflow conditions in uncontrolled wells may include:

[0044] (1) Install the assembled clamping device on the front end of the remote control machine arm at a safe distance and fasten it with screws.

[0045] (2) Remote control machine fully open clamping device.

[0046] (3) The remote control machine slowly approaches the wellhead device and stops moving 0.5 meters away from the flange end face of the wellhead device.

[0047] (4) Use the remote control machine rotation mechanism to adjust the center line of the clamping device to align with the center line of the wellhead.

[0048] (5) Use the remote control machine to adjust the horizontal mechanism so that the left and right edges of the clamping ring are aligned horizontally with the left and right edges of the wellhead flange surface.

[0049] (6) The remote control machine’s boom arm is variable and lifting clamping device, with a height of 50 mm from the wellhead flange surface (re-check the centering and horizontality).

[0050] (7) Remotely control the machine to change the amplitude and slowly lower the clamping device 50 mm so that the lower edge of the clamping ring fits into the wellhead flange surface.

[0051] (8) The remote control machine closes the clamping ring and slowly moves it towards the flange gasket.

[0052] (9) After observing that the flange gasket is completely inserted into the clamping position, the remote control tool head locks the clamping ring.

[0053] (10) The remote control machine changes the amplitude and lifts the clamping device to quickly cut the air flow and remove the wellhead flange gasket.

[0054] In summary, the advantages proposed by the present invention include at least one of the following:

[0055] (1) The clamping device for removing flange gaskets from uncontrolled oil and gas wells of the present invention can realize the operation of quickly removing flange gaskets from the wellhead when a blowout is out of control and a fire occurs, and when workers need to perform emergency operations near the wellhead.

[0056] (2) The clamping device for removing flange gaskets from uncontrolled oil and gas wells of the present invention provides a new technical means for removing flange gaskets from uncontrolled blowouts, thereby achieving rapid and stable clamping of flange gaskets, overcoming the impact force and torque caused by the blowout fluid on the flange gaskets, and ensuring the safety of operators and equipment.

[0057] (3) The clamping device for removing flange gaskets from uncontrolled oil and gas wells of the present invention can be connected to remote control equipment or other operating equipment, and has a wide range of applications.

[0058] Although the above description of a clamping device for removing flange gaskets from uncontrolled oil and gas wells of the present invention has been described in conjunction with exemplary embodiments, it should be clear to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A clamping device for removing flange gaskets from uncontrolled oil and gas wells, characterized in that: The clamping device includes a clamping ring, anti-slip slips and an anti-flying skirt, wherein the clamping ring includes a clamping ring body and an annular portion, the clamping ring body includes a vertical rod portion and a horizontal rod portion connected vertically, and the annular portion is connected to the horizontal rod portion; the anti-flying skirt is arranged on the annular portion; and the anti-slip slips are arranged on the inner wall of the annular portion.

2. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 1 is characterized in that: The annular portion is in the shape of one-third of a circle.

3. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 1 is characterized in that: The annular portion is provided with a stepped plane connected to the anti-flying skirt.

4. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 1 is characterized in that: The clamping ring body is provided with a reinforcing rib plate, and the reinforcing rib plate is located between the right angle formed by the vertical rod portion and the horizontal rod portion.

5. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 4 is characterized in that: The reinforcing rib plate is connected to the clamping ring body by welding.

6. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 1 is characterized in that: The annular portion is provided with a padding pin hole for connecting pins of different lengths.

7. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 6 is characterized in that: The padding pin holes are evenly distributed on the annular portion.

8. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 6 is characterized in that: The design value of the pitch circle diameter of the pad pin hole is 5 to 8 mm larger than the BX flange step diameter.

9. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 1 is characterized in that: The clamping device further includes a connecting plate connected to the crossbar portion.

10. The clamping device for removing flange gaskets from uncontrolled oil and gas wells according to claim 9, characterized in that: The connecting plate is connected to a remote control machine arm.

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