A blowout preventer with quick-connect structure

Abstract

The utility model discloses a blowout preventer with a quick-connection structure, and relates to the field of petroleum equipment. It includes an external connection flange and a connecting flange matched with the blowout preventer body, wherein the connecting flange is provided with a quick-connection structure, and the quick-connection structure includes a groove provided on the connecting flange and an oil passage provided on the outer wall of the connecting flange, and the oil passage is connected with the groove; a piston is sealingly and slidingly installed in the groove, and a pressure cover is threadedly connected at the opening of the groove; the quick-connection structure also includes a matching number of threaded bolts and locking bolts, and the threaded bolts and locking bolts are respectively arranged on the two end surfaces of the piston; the threaded bolts seal through the pressure cover and penetrate the external connection flange to connect the threaded nuts; the locking bolts seal through the connecting flange and are connected with the locking nuts. The beneficial effects of the utility model are: the quick-connection structure on the connecting flange is used to realize synchronous pre-tightening of the bolts, so that the tightening of the bolts is simple and easy to operate, the installation is fast and convenient, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of petroleum equipment, relates to the field of blowout preventers, and specifically relates to a blowout preventer with a quick-connect structure. Background Art

[0002] BOPs are important drilling channel equipment involved in safety during oil drilling and well repair operations. They are used to control the pressure in the well, prevent blowouts, and avoid damage to personnel, equipment, and the environment. In oil drilling, the commonly used BOPs are mainly ram BOPs and annular BOPs. Ram BOPs and annular BOPs are generally used in groups. Flanges are almost always used to connect BOPs and between BOPs and wellheads. Flanges are fastened with bolts and nuts and sealed with sealing gaskets.

[0003] In order to ensure the safety and reliability of the seal, a large number of bolts are used to connect the flanges. During installation, tools such as torque wrenches, hammer wrenches or sledgehammers are required to tighten the bolts and nuts one by one. In order to ensure that the gasket is evenly stressed and the seal is reliable, the bolts and nuts need to be tightened repeatedly, and the assembly sequence of the bolts and nuts needs to be noted. This leads to problems such as long installation time, low operating efficiency, and high labor intensity for operators.

[0004] Moreover, repeated tightening of the bolts and nuts may cause uneven force on the sealing gasket, affecting the sealing effect. In addition, when disassembling it, it is also necessary to unscrew the bolts and nuts one by one. For occasions where frequent disassembly is required (such as pressure testing), the operation is time-consuming and laborious.

[0005] Moreover, the blowout preventer is usually installed under the drilling rig platform, where various pipelines are arranged, and the operating space is limited, which affects the operating efficiency. Utility Model Content

[0006] In order to solve the technical problem that it is time-consuming and laborious to connect a blowout preventer with an external device, the utility model provides a blowout preventer with a quick-connection structure. The quick-connection structure on the connecting flange is used to achieve synchronous pre-tightening of the bolts, making bolt tightening simple and easy to operate, making installation quick and simple, and improving installation efficiency.

[0007] The technical solution adopted by the utility model is as follows: a blowout preventer with a quick-connection structure is provided, comprising an external connection flange and a connecting flange matched with the blowout preventer body, the connecting flange is provided with a quick-connection structure, the quick-connection structure comprises a groove arranged on the connecting flange and an oil passage arranged on the outer wall of the connecting flange, the oil passage is connected with the groove, and a conversion joint or a plug is detachably installed in the oil passage; a piston is sealingly and slidingly installed in the groove, and a pressure cap is threadedly connected at the opening of the groove; the quick-connection structure also comprises a matching number of threaded bolts and locking bolts, and the threaded bolts and the locking bolts are respectively arranged on the two end surfaces of the piston; the threaded bolts seal through the pressure cap and penetrate through the external connection flange to connect the threaded nut; the locking bolt seals through the connecting flange and is connected with a locking nut.

[0008] The threaded bolt seal assembled on the piston passes through the gland and then passes through the external flange, and is threadedly connected to the threaded nut, and the threaded nut is tightened. The other end face of the piston is equipped with a locking bolt, which is threadedly connected to the locking nut after passing through the connecting flange, completing the preparation work of locking assembly, and then the conversion joint is connected to the oil port, so that hydraulic oil is filled into the groove with the help of the oil port, and the gland seals the opening of the groove to form a closed space in the groove, so that the hydraulic oil pushes the piston to slide along the groove, and simultaneously pulls the threaded bolt and the threaded nut to tighten the external flange. And reach the pre-tightening force of the sealing assembly, and then tighten the locking nut to lock the external flange, and there is no need to pay attention to the assembly order of the threaded nut, which can significantly improve the assembly efficiency, and the piston increases the contact area with the hydraulic oil, reduces the pressure demand of the hydraulic oil, increases the safety of use, and reduces the cost of use. After the assembly is completed, after the groove is depressurized, the conversion joint is removed and the threaded plug is replaced to seal the oil outlet to avoid the outflow of hydraulic oil, and to avoid the loosening of the locking nut and the threaded nut, which causes the connection flange and the external flange to be not firmly connected, resulting in sealing failure, thereby ensuring the reliability of use.

[0009] To further optimize the technical solution, thread grooves are circumferentially arranged on both end surfaces of the piston, the threaded bolts and the locking bolts are respectively threadedly connected to the thread grooves, and the piston is slidably assembled with the groove seal by means of a seal.

[0010] The piston is connected with the thread bolt and the locking bolt respectively through the thread grooves evenly distributed on the two end surfaces thereof, so the assembly is simple and the use is stable and reliable.

[0011] To further optimize the technical solution, the sealing member includes a piston sealing ring arranged on the outer wall of the piston, and the piston sealing ring is sealingly and slidingly connected to the inner wall of the groove.

[0012] The piston sealing ring sleeved on the outer wall of the piston ensures the sealing performance of the assembly with the groove, thereby ensuring the smoothness and reliability of the hydraulic oil pushing the piston to slide along the groove.

[0013] To further optimize the technical solution, the outer wall of the piston is also sleeved with a wear-resistant belt, which is sealingly and slidingly assembled with the inner wall of the groove.

[0014] The wear-resistant belt guides and supports the piston, ensuring that the piston maintains the correct position during movement, avoiding wear of the piston seal ring, protecting it and extending its service life.

[0015] To further optimize the technical solution, a bolt sealing ring is provided on the outer wall of the thread-planting bolt, and the bolt sealing ring is sealed and assembled with the pressure cover.

[0016] The bolt sealing ring ensures the sealing of the threaded bolt and the gland assembly, avoids the leakage of hydraulic oil in the groove, and ensures safety and reliability in use.

[0017] To further optimize the technical solution, a sealing groove is provided on the end face of the connecting flange, and a gland sealing ring is provided in the sealing groove, and the gland sealing ring is sealingly fitted with the end face of the gland.

[0018] After the gland is assembled into place along the groove, the end face of the gland is sealed against the gland sealing ring to ensure the sealing of the groove, avoid leakage of hydraulic oil, and prevent dust and water from entering the groove.

[0019] The beneficial effects of the utility model are:

[0020] 1. The locking bolt at one end of the piston passes through the connecting flange and is connected to the locking nut. The threaded bolt at the other end of the piston passes through the gland, passes through the external flange and is connected to the threaded nut. After tightening the threaded nut, hydraulic oil is filled into the groove through the oil passage to push the piston to move, and the threaded bolt and threaded nut pull the external flange to the pre-tightening force, and then tighten the locking nut to lock the external flange. Special attention should be paid to the smooth assembly of the locking nut, easy operation, and improved assembly efficiency.

[0021] 2. After the external flange is locked, release the pressure in the groove, remove the conversion joint, replace the plug to seal the oil passage to prevent the hydraulic oil from flowing out, thereby preventing the locking nut and the threaded nut from loosening, so as to ensure the firmness of the assembly of the connecting flange and the external flange and avoid sealing failure;

[0022] 3. The piston uses the piston seal ring to ensure the sealing of the piston and the groove, so as to ensure the smoothness and reliability of the hydraulic oil pushing the piston to move along the groove. The wear-resistant belt on the outer wall of the piston guides and supports the piston to ensure that the piston maintains the correct position during the movement, avoids the wear of the piston seal ring, protects it and prolongs its service life;

[0023] 4. The bolt sealing ring on the outer wall of the threaded bolt ensures the sealing of the threaded bolt and the gland to avoid leakage of hydraulic oil in the groove. After the gland is assembled along the groove, the end face of the gland is sealed with the gland sealing ring on the end face of the connecting flange to ensure the sealing of the gland and the groove, avoid leakage of hydraulic oil, and prevent dust and water from entering the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the blowout preventer with a quick-connect structure of this embodiment;

[0025] Figure 2 Schematic diagram of the structure of the quick connection structure of this embodiment;

[0026] Figure 3 It is a schematic structural diagram of the assembly of the piston and the groove of this embodiment.

[0027] In the figure, 1, BOP body; 2, connecting flange; 201, groove; 202, oil passage; 203, gland; 204, sealing groove; 2041, gland sealing ring; 3, external flange; 4, piston; 401, threaded groove; 402, piston sealing ring; 403, wear-resistant belt; 5, threaded bolt; 501, threaded nut; 502, bolt sealing ring; 6, locking bolt; 601, locking nut. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Please see attached Figure 1-3A blowout preventer with a quick-connection structure comprises an external connection flange 3 and a connecting flange 2 matchedly arranged on a blowout preventer body 1. The external connection flange 3 is assembled with the external connection equipment. After the connecting flange 2 is assembled with the external connection flange 3, the blowout preventer body 1 is connected with the external connection equipment. The connecting flange 2 is provided with a quick-connection structure to realize the quick connection of the connecting flange 2 and the external connection flange 3. The quick-connection structure comprises a groove 201 arranged on the connecting flange 2 and an oil passage 202 arranged on the outer wall of the connecting flange 2. The oil passage 202 is connected with the groove 201. A conversion joint and a plug are disassembled and installed in the oil passage 202. A piston 4 is sealingly and slidably installed in the groove 201. A pressure cap 203 is threadedly connected at the opening of the groove 201. The pressure cap 203 is threadedly assembled with the connecting flange 2 to restrict the piston 4 in the groove 201 and to seal the opening of the groove 201, so that a closed space is formed in the groove 201, and then the oil passage 2 is passed through the oil passage 2 02 After the hydraulic oil is filled into the groove 201, the piston 4 can be pushed to slide along the groove 201. The piston 4 is slidably assembled with the groove 201 with the help of a seal. The seal is a piston seal ring 402 sleeved on the outer wall of the piston 4. The piston seal ring 402 is sealed and slidably connected with the inner wall of the groove 201. The piston seal ring 402 ensures the sealing of the assembly of the piston 4 and the groove 201, and ensures the smooth sliding of the piston 4. At the same time, the piston 4 increases the contact area with the hydraulic oil, reduces the pressure demand for the use of the hydraulic oil, increases the safety factor of use, and does not need to use an additional high-pressure pump, reducing the cost of use. The outer wall of the piston 4 is also sleeved with a wear-resistant belt 403, which is also sealed and slidably assembled with the inner wall of the groove 201. The wear-resistant belt 403 guides and supports the piston 4, ensures that the piston 4 maintains the correct position during the movement, reduces the wear of the piston seal ring 402, so as to protect it and extend its service life;

[0030] Please see attached Figure 1-3 When the gland 203 is assembled with the groove 201, a sealing groove 204 is provided on the end face of the connecting flange 2, and a gland sealing ring 2041 is provided in the sealing groove 204. After the gland 203 and the connecting flange 2 are assembled in place, the end face of the gland 203 abuts against the end face of the connecting flange 2, and the end face of the gland 203 is sealed and fitted with the gland sealing ring 2041, so as to ensure the sealing of the groove 201, avoid leakage of hydraulic oil, and prevent dust and water from entering the groove 201;

[0031] Please see attached Figure 1-3The quick-connect structure on the connecting flange 2 also includes a number and position matching threaded bolts 5 and locking bolts 6. The threaded bolts 5 and locking bolts 6 are both tightened and fixed on the piston 4 by means of threaded grooves 401. The threaded grooves 401 are both arranged on the two end faces of the piston 4, making it easy to assemble, flexible and easy to use. When the threaded bolts 5 pass through the gland 203 and the external flange 3, the bottom of the groove 201 is uniformly distributed with rubber columns along the circumferential direction. The rubber columns support the piston 4, so that the threaded bolts 5 are completely extended out of the gland 203 and the external flange 3, and the threaded nuts 501 are connected. The outer wall of the threaded bolts 5 The upper sleeve is provided with a bolt sealing ring 502, which is used to ensure the sealing of the assembly of the threaded bolt 5 and the pressure cover 203. The locking bolt 6 is sealed and passed through the connecting flange 2 and then threadedly connected to the locking nut 601. Hydraulic oil is filled into the groove 201 to push the piston 4 to move. The piston 4 reaches the pre-tightening force on the external flange 3 through the threaded threaded bolt 5 and the threaded nut 501. Then, by tightening the locking bolt 6 and the locking nut 601, the external flange 3 is tightened and fixed to complete the assembly operation. Since the threaded bolt 5 and the threaded nut 501 reach the pre-tightening force synchronously, there is no need to pay extra attention to the assembly sequence, and the operation is simple;

[0032] The working principle of the blowout preventer with a quick-connection structure is as follows: when the gate blowout preventer or the annular blowout preventer is connected to the external connection equipment, the blowout preventer body 1 is connected to the external connection flange 3 on the external connection equipment by means of the connection flange 2 provided in conjunction with the connection port, the threaded bolt 5 is assembled with the piston 4 in the groove 201 of the connection flange 2, the threaded bolt 5 passes through the gland 203 in a sealed manner, passes through the external connection flange 3, and is threadedly connected to the threaded nut 501, and the threaded nut 501 is tightened with the threaded bolt 5. The locking bolt 6 connected to the other end face of the piston 4 is threadedly connected to the locking nut 601 after passing through the connection flange 2. Then, the conversion joint is connected to the oil passage 202, and the conversion joint is connected to the oil pump device, so that the hydraulic oil is injected into the groove 201 through the oil passage 202. The groove 201 is blocked by the pressure cover 203 to form a closed space, so that the hydraulic oil pushes the piston 4 to move along the groove 201, thereby synchronously pulling the wire bolt 5 and the wire nut 501, and synchronously reaching the pre-tightening force on the external flange 3, so that the wire bolt 5 and the wire nut 501 lock the external flange 3, and then tighten the locking nut 601 to lock the external flange 3. Since the wire bolt 5 and the wire nut 501 reach the pre-tightening force synchronously, there is no need to pay attention to the assembly order of the locking nut 601, and it can be tightened, which is easy to operate and labor-saving. At the same time, the piston 4 increases the contact area with the hydraulic oil, reduces the use requirements of the hydraulic oil pressure, improves the use safety, and reduces the use cost. After the external flange 3 is assembled, the groove 201 is depressurized and the conversion joint is replaced with a screw plug to prevent leakage of the hydraulic oil in the groove 201, thereby preventing the locking nut 601 and the threaded nut 501 from loosening, causing the connection flange 2 and the external flange 3 to be loose, resulting in sealing failure.

Claims

1. A blowout preventer with a quick-connection structure, comprising an external connection flange (3) and a connecting flange (2) matched with a blowout preventer body (1), characterized in that: The connection flange (2) is provided with a quick-connection structure, which comprises a groove (201) provided on the connection flange (2) and an oil passage opening (202) provided on the outer wall of the connection flange (2), the oil passage opening (202) being connected to the groove (201), and a conversion joint or a screw plug being detachably installed in the oil passage opening (202); a piston (4) is sealingly and slidably installed in the groove (201), and a pressure cover (203) is threadedly connected at the opening of the groove (201); the quick-connection structure also comprises a matching number of threaded bolts (5) and locking bolts (6), which are respectively arranged on the two end surfaces of the piston (4); the threaded bolts (5) sealably pass through the pressure cover (203) and penetrate the outer connection flange (3) to connect with the threaded nut (501); the locking bolt (6) sealably passes through the connection flange (2) and is connected with the locking nut (601).

2. A blowout preventer with a quick-connect structure according to claim 1, characterized in that: The piston (4) is provided with thread grooves (401) along the circumferential direction on both end surfaces. The threaded bolts (5) and the locking bolts (6) are respectively threadedly connected to the thread grooves (401). The piston (4) is sealed and slidably assembled with the grooves (201) by means of a sealing member.

3. A blowout preventer with a quick-connect structure according to claim 2, characterized in that: The sealing element comprises a piston sealing ring (402) arranged on the outer wall of the piston (4), and the piston sealing ring (402) is sealingly and slidably connected to the inner wall of the groove (201).

4. A blowout preventer with a quick-connect structure according to claim 3, characterized in that: The outer wall of the piston (4) is also sleeved with a wear-resistant belt (403), and the wear-resistant belt (403) is sealingly slidably assembled with the inner wall of the groove (201).

5. The blowout preventer with a quick-connect structure according to claim 1, characterized in that: The outer wall of the thread-planting bolt (5) is sleeved with a bolt sealing ring (502), and the bolt sealing ring (502) is sealed and assembled with the pressure cover (203).

6. The blowout preventer with a quick-connect structure according to claim 1, characterized in that: A sealing groove (204) is provided on the end surface of the connecting flange (2), and a gland sealing ring (2041) is provided in the sealing groove (204), and the gland sealing ring (2041) is sealingly fitted with the end surface of the gland (203).

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