An integrated flange clamping and removal device for well blowout emergency response

Abstract

An integrated flange clamping and removal device for well blowout emergency response. It includes a beam, upper clamping body, lower clamping body, limiting sleeve, clamping nut, pressure sleeve, tension spring, first toothed plate, second toothed plate, claw, wedge, lifting ring, connecting cable, beam roller, upper ear plate, lower clamping body roller, lower ear plate, and fixing pin. The advantages of this invention are: it adopts a completely mechanical structure; the components are simple, practical, safe, and reliable; through simple operation, it helps avoid the effects of high wellhead temperatures, reduces operational steps, and can efficiently and safely complete the clamping, automatic release, and removal of damaged residual flanges, reducing safety risks to personnel and emergency equipment during removal and improving emergency rescue efficiency.

Description

Technical Field

[0001] This invention belongs to the field of wellhead emergency repair technology for well blowouts in oil and gas fields, and specifically relates to an integrated flange clamping and removal device for well blowout emergency repair. Background Technology

[0002] As oil and gas exploration and development expands into new areas, blocks, and formations, various risks and challenges intertwine and overlap, making well control a more severe and complex situation. The exploration and development of high-pressure, high-yield, and high-sulfur oil and gas wells poses a severe test to existing drilling, well control, and emergency response technologies. Especially after a blowout and fire in a high-pressure, high-yield, and high-sulfur oil and gas well, the on-site environment for emergency response is harsh. High-intensity heat radiation, lateral flames, and high-pressure fluids can cause injuries and fatalities to rescue personnel and damage to rescue equipment, forcing the interruption of rescue operations. During the restoration of the wellhead, the damaged blowout preventer assembly needs to be removed. The cutting position is mainly from above the lower flange of the four-way valve to below the side opening. The remaining flange needs to be removed manually after removing the bolts before installing the new wellhead equipment. During flange removal, the remaining flange is easily ejected under the pressure of high-pressure fluid, potentially causing injury. There is also the problem of flanges sticking together and being difficult to remove, increasing the difficulty of the rescue. Currently, no literature or reports have been found regarding flange clamping and removal devices for blowout emergency response. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide an integrated flange clamping and removal device for well blowout emergency response.

[0004] To achieve the above objectives, the integrated flange clamping and removal device for blowout emergency response provided by this invention includes a beam, an upper clamping body, a lower clamping body, a limiting sleeve, a clamping nut, a pressure sleeve, a tension spring, a first toothed plate, a second toothed plate, a claw, a wedge, a lifting ring, a connecting cable, beam rollers, an upper ear plate, a lower clamping body roller, a lower ear plate, and a fixing pin; wherein, the upper part of the beam is cylindrical and has external threads, the lower part has a rectangular cross-section and an inverted U-shaped opening at the lower end, and a pair of pin holes are symmetrically formed at the lower ends of the two side plates at the inverted U-shaped opening; the axles of multiple beam rollers are respectively connected to the two side edges of the inverted U-shaped opening on the beam; one end of each of the two upper ear plates is respectively connected to the two sides of the beam. The lower edge of one side of the plate; one end of the upper clamping body forms a square through hole that fits onto the outer side of the upper part of the lower beam, and the other side of the bottom surface is recessed horizontally upward to form a first trapezoidal groove; the lower clamping body is an L-shaped structure composed of vertical rods and horizontal rods, wherein the middle and upper part of the vertical rod is inserted into the space between the two side plates of the beam, and multiple lower clamping body rollers located below the beam rollers are installed on the two opposite sides of the upper part of the vertical rod, and a pin hole is formed through the other two sides. The lower clamping body and the beam are connected by a fixing pin passing through the pin hole on the beam, so the vertical rod on the lower clamping body can rotate around the inverted U-shaped opening space of the fixing pin on the beam; the outer side of the horizontal rod A second trapezoidal groove is formed by a horizontal indentation on the top surface, and the position of the horizontal bar corresponds vertically to that of the upper clamping body; one end of each of the two lower ear plates is connected to the same edge of two opposite sides of the lower part of the vertical bar, and their positions correspond vertically to those of the two upper ear plates; the limiting sleeve is fitted onto the outside of the inverted U-shaped opening on the beam in a way that allows it to slide up and down, and at least two handle lugs are provided on the side; the pressure sleeve is fitted onto the upper part of the beam, and the upper side uses the engagement of the clamping nut with the external thread on the beam to press the upper clamping body; the upper and lower ends of the two tension springs are respectively connected to the upper and lower ear plates located on the same side, and the lower clamping body is pulled around the fixing pin by its own tension force to achieve the release of the device; First The cross-sections of the toothed plate and the second toothed plate are both trapezoidal, and they are respectively installed in the first trapezoidal groove of the upper clamping body and the second trapezoidal groove of the lower clamping body; the claw is a cylindrical shape with a frustum-shaped through hole inside, and hardened teeth are formed along the circumferential direction on the outer circumferential surface, and multiple slits are formed at intervals along the axial direction on the lower side wall; the wedge is frustum-shaped, with the upper part located outside the upper end of the claw and having an internal threaded hole, and the lower part located inside the through hole of the claw; the lower part of the lifting ring has an external thread that mates with the internal threaded hole on the wedge; at least one connecting cable has its two ends connected to a release lug on the limiting sleeve and a ring at the upper end of the lifting ring, respectively, and one end of another connecting cable is connected to a release lug on the limiting sleeve, and the other end is connected to the lifting equipment.

[0005] Hardened teeth are formed on the bottom surface of the first toothed plate and the top surface of the second toothed plate, respectively, for gripping the flange to maintain the stability of the clamping state of the device.

[0006] The integrated flange clamping and removal device for blowout emergency response also includes a first limiting plate and a second limiting plate, which are respectively installed on the sides of the upper clamping body and the lower clamping body located on the outer sides of the first and second jaw plates.

[0007] The beams have different lengths to accommodate flanges of different sizes.

[0008] The integrated flange clamping and removal device for well blowout emergency response provided by this invention has the following advantages: it adopts a completely mechanical structure, the components are simple, practical and safe and reliable, and through simple operation, it helps to avoid the influence of high temperature at the wellhead, reduces operation steps, and can efficiently and safely complete the clamping, automatic release and removal of damaged residual flanges, reducing the safety risks to operators and emergency equipment during the removal process and improving the efficiency of emergency rescue. Attached Figure Description

[0009] Figure 1 A perspective view of the integrated flange clamping and removal device for well blowout emergency response provided by the present invention. Detailed Implementation

[0010] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0011] like Figure 1As shown, the integrated flange clamping and removal device for blowout emergency repair provided by the present invention includes a beam 1, an upper clamping body 2, a lower clamping body 3, a limiting sleeve 4, a clamping nut 5, a pressure sleeve 6, a tension spring 7, a first toothed plate 9, a second toothed plate 9a, a claw 10, a wedge 11, a lifting ring 12, a connecting cable 13, beam rollers 14, upper ear plates 15, lower clamping body rollers 18, lower ear plates 21, and a fixing pin 22; wherein, the upper part of the beam 1 is cylindrical and has external threads 16, the lower part has a rectangular cross-section and an inverted U-shaped opening at the lower end, and a pair of pin holes are symmetrically formed at the lower ends of the two side plates at the inverted U-shaped opening; the axles of the multiple beam rollers 14 are respectively connected to the two side edges of the inverted U-shaped opening on the beam 1; one end of each of the two upper ear plates 15 is respectively connected to the beam 1 The lower edge of one side of the upper two side plates; one end of the upper clamping body 2 forms a square through hole that fits on the outer side of the lower upper end of the beam 1, and the bottom surface of the other side is recessed upward along the horizontal direction to form a first trapezoidal groove 20; the lower clamping body 3 is an L-shaped structure composed of a vertical rod and a horizontal rod, wherein the middle and upper part of the vertical rod is inserted into the space between the upper two side plates of the beam 1, and multiple lower clamping body rollers 18 located below the beam rollers 14 are respectively installed on the two opposite sides of the upper part of the vertical rod, and a pin hole is formed through the other two sides. The lower clamping body 3 and the beam 1 are connected by means of a fixing pin 22 passing through the pin hole on the beam 1, so the vertical rod on the lower clamping body 3 can rotate around the fixing pin 22 in the inverted U-shaped opening space on the beam 1; the top surface of the outer side of the horizontal rod is recessed upward along the horizontal direction to form a first trapezoidal groove 20; A second trapezoidal groove 20a is formed by a downward indentation, and the position of the crossbar corresponds vertically to that of the upper clamping body 2; one end of each of the two lower ear plates 21 is connected to the same edge of two opposite sides of the lower part of the vertical bar, and the positions of the two upper ear plates 15 correspond vertically to those of the upper ear plates 15; the limiting sleeve 4 is fitted onto the outside of the inverted U-shaped opening on the beam 1 in a way that allows it to slide up and down, and at least two handles 19 are provided on the side; the pressure sleeve 6 is fitted onto the upper part of the beam 1, and the upper side is pressed against the upper clamping body 2 by the engagement of the clamping nut 5 with the external thread 16 on the beam 1; the upper and lower ends of the two tension springs 7 are respectively connected to the upper ear plate 15 and the lower ear plate 21 located on the same side, and the lower clamping body 3 is pulled around the fixing pin 22 by its own tension force to realize the release of the device; the first toothed plate 9 and the second The cross-section of the toothed plates 9a is trapezoidal, and they are respectively installed in the first trapezoidal groove 20 of the upper clamping body 2 and the second trapezoidal groove 20a of the lower clamping body 3; the claw 10 is a cylindrical shape with a frustum-shaped through hole inside, and hardened teeth are formed on the outer circumferential surface along the circumferential direction, and multiple slits are formed at intervals along the axial direction on the lower side wall; the wedge 11 is frustum-shaped, with the upper part located outside the upper end of the claw 10 and having an internal threaded hole, and the lower part located inside the through hole of the claw 10; the lower part of the lifting ring 12 has an external thread that mates with the internal threaded hole on the wedge 11; at least one connecting cable 13 has both ends connected to a release handle 19 on the limiting sleeve 4 and a ring on the upper end of a lifting ring 12, and one end of another connecting cable 13 is connected to a release handle 19 on the limiting sleeve 4, and the other end is connected to the lifting equipment.

[0012] Hardened teeth are formed on the bottom surface of the first toothed plate 9 and the top surface of the second toothed plate 9a, respectively, for gripping the flange to maintain the stability of the clamping state of the device.

[0013] The integrated flange clamping and removal device for blowout emergency response also includes a first limiting plate 8 and a second limiting plate 8a, which are respectively installed on the sides of the upper clamping body 2 and the lower clamping body 3 located on the outer sides of the first clamping plate 9 and the second clamping plate 9a.

[0014] The beam 1 has different lengths to accommodate flanges of different sizes.

[0015] The method of using the integrated flange clamping and removal device for well blowout emergency response provided by this invention is described below:

[0016] When a blowout occurs and a fire breaks out, requiring the removal of the cut-off residual flange, the construction personnel first remove some of the bolts on the residual flange. At least two of these devices are needed to remove each residual flange. Then, the limiting sleeve 4 is pulled down to the outside of the overlapping section of the vertical rod on the beam 1 and the lower clamping body 3. The beam roller 14 and the lower clamping body roller 18 are used to press against the limiting sleeve 4 from the inside, restricting the relative position of the beam 1 and the lower clamping body 3, keeping them in an "L" shape. Next, the upper clamping body 2 and the lower clamping body 3 are placed on the upper and lower surfaces of the residual flange, respectively. All devices used are symmetrically arranged on the residual flange. Pressure is then applied using the clamping nut 5 and the clamping sleeve 6 until the residual flange is clamped by the upper clamping body 2, the lower clamping body 3, and the beam 1. Simultaneously, the hardened teeth on the first and second jaw plates 9 and 9a are used to grip the residual flange, preventing it from flying out and injuring people under the pressure of the fluid. Finally, each claw 10 is inserted into a suitable bolt hole on the residual flange. After the remaining bolts are removed, the lifting equipment is started. The limiting sleeve 4 is lifted by the connecting cable 13 connected to it, so that the limiting sleeve 4 is away from the outside of the part where the beam 1 and the upper vertical rod of the lower clamp 3 overlap. At this time, the lower clamp 3 will be unrestricted. Under the tension of the tension spring 7, the lower clamp 3 will rotate around the fixing pin 22 to release the device. That is, the upper clamp 2, the lower clamp 3 and the beam 1 loosen the remaining flange. Continue to lift the limiting sleeve 4, thereby driving the wedge 11 to move upward through the connecting cable 13 connected to the lifting ring 12. This expands the hole claw 10, and then the hardened teeth on the hole claw 10 bite into the bolt hole, thereby removing the remaining flange.

Claims

1. An integrated flange clamping and removal device for well blowout emergency response, characterized in that: The integrated flange clamping and removal device for blowout emergency response includes a beam (1), an upper clamping body (2), a lower clamping body (3), a limiting sleeve (4), a clamping nut (5), a pressure sleeve (6), a tension spring (7), a first toothed plate (9), a second toothed plate (9a), a claw (10), a wedge (11), a lifting ring (12), a connecting cable (13), beam rollers (14), an upper ear plate (15), a lower clamping body roller (18), a lower ear plate (21), and a fixing pin (22); wherein, the upper part of the beam (1) is cylindrical and has external threads (16), the lower part has a rectangular cross-section and an inverted U-shaped opening at the lower end, and a pair of pin holes are symmetrically formed at the lower ends of the two side plates at the inverted U-shaped opening; multiple beam rollers (14) The two ends of the wheel axle are respectively connected to the two sides of the inverted U-shaped opening on the beam (1); one end of the two upper ear plates (15) is respectively connected to the lower edge of one side of the two side plates on the beam (1); one end of the upper clamping body (2) forms a square through hole that fits on the outer side of the lower upper end of the beam (1), and the bottom surface of the other side is recessed upward along the horizontal direction to form a first trapezoidal groove (20); the lower clamping body (3) is an L-shaped structure composed of a vertical rod and a horizontal rod, wherein the middle and upper part of the vertical rod is inserted into the space between the two side plates on the beam (1), and multiple lower clamping body rollers (18) located below the beam rollers (14) are respectively installed on the two opposite sides of the upper part of the vertical rod, and a pin hole is formed between the other two sides, through which the lower clamping body rollers (18) are inserted by a fixing pin (22). The lower clamping body (3) and the beam body (1) are connected together by a pin hole on the clamping body (3), so the vertical rod on the lower clamping body (3) can rotate around the fixing pin (22) in the inverted U-shaped opening space on the beam body (1); a second trapezoidal groove (20a) is formed by a horizontal downward indentation on the outer top surface of the horizontal rod, and the horizontal rod corresponds vertically to the upper clamping body (2); one end of the two lower ear plates (21) is respectively connected to the same edge of the two opposite sides of the lower part of the vertical rod, and corresponds vertically to the two upper ear plates (15); the limiting sleeve (4) is fitted on the outside of the inverted U-shaped opening on the beam body (1) in a way that can slide up and down, and at least two handles (19) are provided on the side; the pressure sleeve (6) is fitted The upper part of the beam (1) is clamped by the fit between the clamping nut (5) and the external thread (16) on the beam (1); the upper and lower ends of the two tension springs (7) are respectively connected to the upper ear plate (15) and the lower ear plate (21) on the same side, and the lower clamp (3) is pulled by its own tension force to rotate around the fixing pin (22) so as to release the device; the cross-section of the first tooth plate 9 and the second tooth plate (9a) is trapezoidal, and they are respectively installed in the first trapezoidal groove (20) of the upper clamp (2) and the second trapezoidal groove (20a) of the lower clamp (3); the claw (10) is a cylindrical shape with a frustum-shaped through hole inside, and hardened teeth are formed on the outer circumferential surface along the circumferential direction, and multiple slits are formed on the lower side wall along the axial direction;The wedge (11) is frustum-shaped, with its upper part located outside the upper end of the claw (10) and having an internal threaded hole, and its lower part located inside the through hole of the claw (10); the lower part of the lifting ring (12) has an external thread that mates with the internal threaded hole on the wedge (11); at least one connecting cable (13) has its two ends connected to a release lug (19) on the limiting sleeve (4) and a ring on the upper end of the lifting ring (12), respectively; one end of another connecting cable (13) is connected to a release lug (19) on the limiting sleeve (4), and the other end is connected to the lifting equipment.

2. The integrated flange clamping and removal device for well blowout emergency response as described in claim 1, characterized in that: Hardened teeth are formed on the bottom surface of the first toothed plate (9) and the top surface of the second toothed plate (9a) respectively, for gripping the flange to maintain the stability of the clamping state of the device.

3. The integrated flange clamping and removal device for well blowout emergency response as described in claim 1, characterized in that: The integrated flange clamping and removal device for blowout emergency response also includes a first limiting plate (8) and a second limiting plate (8a) respectively installed on the sides of the upper clamping body (2) and the lower clamping body (3) located on the outer sides of the first clamping plate (9) and the second clamping plate (9a).

4. The integrated flange clamping and removal device for well blowout emergency response as described in claim 1, characterized in that: The beam (1) has different lengths to accommodate flanges of different sizes.

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