Blowout prevention device for oil drilling and production

Abstract

The utility model relates to the technical field of blowout preventers, in particular to a blowout preventer for petroleum drilling, which comprises a valve body and a wellhead, a concrete mounting seat is arranged on the periphery of the wellhead, a plurality of groups of screws are fixed on the surface of the concrete mounting seat, the screws are movably inserted into through holes, nuts are rotatably connected onto the surfaces of the screws, and the nuts are movably connected onto the valve body. A limiting rod mounting groove is formed in the surface of the valve body; the device has the beneficial effects that when the nut is screwed, the limiting rod completely retracts into the limiting rod mounting groove, after the bottom end of the nut abuts against the top end of the elastic gasket, the elastic gasket continues to be screwed in the screwing direction, and when one side face of the nut is parallel to the end face of the end, facing the nut, of the limiting rod, the elastic gasket is screwed in the screwing direction. And one end of the limiting rod can extend out of the limiting rod mounting groove, the other end of the limiting rod stays in the limiting rod mounting groove, and the end, extending out of the limiting rod mounting groove, of the limiting rod abuts against the side face of the nut, so that the nut is limited in the circumferential direction, and the thread looseness prevention function between the screw rod and the nut is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of blowout preventer, specifically is a kind of oil drilling is prevented and sprays device. BACKGROUND

[0002] Oil drilling is prevented and sprays device, also known as blowout preventer, is the key equipment for preventing blowout in the process of oil drilling, can effectively control and manage wellhead (2) pressure, ensure the safety of drilling operation.

[0003] In the prior art, the patent file with application No. CN201921918727.2 discloses an oil drilling blowout preventer, comprising a valve body (1), a first pipe body and a second pipe body, the valve body (1) is welded at both ends with the second pipe body, and the second pipe body is internally sleeved with a second transmission rod, the top end of the second pipe body is installed with a latch through a mounting groove, the bottom of the second pipe body is welded with the first pipe body, and the first pipe body is internally sleeved with a first transmission rod, the first transmission rod and the second transmission rod are both connected at one end with an end cap through a threaded groove, the end cap is fixed at one side with a powerful magnet through a bolt, and the outside of the powerful magnet is installed with a corrosion-resistant sealing ring through a mounting groove, the bottom of the valve body (1) is provided with a reserved groove at both ends, and the reserved groove is internally fixed with a rotating plug through a rotating shaft, and a small spring is installed between the rotating plug and the reserved groove through a mounting groove. The utility model adopts double sealing, and the blowout effect is better, so it is suitable for being widely promoted and used.

[0004] However, the valve body (1) in the prior art is simply installed on the wellhead (2) by bolts, and during long-term use, the threads between the bolts and the screw holes may loosen under the influence of temperature and humidity environment and oil pressure, which may cause gaps between the valve body (1) and the wellhead (2), resulting in oil leakage. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an oil drilling blowout preventer to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an oil drilling blowout preventer, comprising: a valve body and a wellhead, a plurality of groups of through holes are formed on the surface of the valve body, a plurality of groups of screw rods are fixed on the surface of the concrete mounting seat around the wellhead, the screw rods are movably inserted into the through holes, nuts are rotatably connected to the surface of the screw rods, a limit rod mounting groove is formed on the surface of the valve body, one end of the limit rod is movably inserted into the limit rod mounting groove, and the other end of the limit rod abuts against the surface of the nut.

[0007] Preferably, the limiting rod is in a rectangular rod body structure, the bottom end of the limiting rod is fixed with a limiting spring, and the bottom end of the limiting spring is fixed on the inner wall of the slot body of the limiting rod mounting slot.

[0008] Preferably, the wellhead is movably inserted at the bottom end of the valve body, the top end of the wellhead is fixed with a sealing gasket, and the sealing gasket is abutted against the inner wall of the valve body.

[0009] Preferably, the rod body of the screw is sleeved with an elastic washer, the bottom end of the elastic washer is abutted against the surface of the valve body, and the top end of the elastic washer is abutted against the surface of the nut.

[0010] Preferably, a push rod slot is formed in the surface of the valve body, a push rod is slidably connected in the push rod slot, one end of the push rod extends into the limiting rod mounting slot and is fixed on the surface of the limiting rod, and the other end of the push rod extends out of the push rod slot.

[0011] Preferably, a sealing groove is formed in the slot body of the push rod slot, one end of a sealing plate is movably inserted in the sealing groove, and the other end of the sealing plate extends into the push rod slot and is fixed on the surface of the push rod.

[0012] Compared with the prior art, the petroleum drilling device has the beneficial effects that:

[0013] The petroleum drilling device provided by the utility model adopts a blowout preventer, before installation between the valve body and the wellhead, the port of the wellhead is exposed to the ground, and concrete is poured around the port of the wellhead, the concrete is solidified to form a concrete mounting seat, and the screw is planted in the pouring process, when the valve body and the wellhead are installed, the port of the wellhead is inserted into the bottom end of the valve body, and the sealing gasket at the top end of the wellhead is tightly pressed against the inner wall of the valve body, thereby preventing oil leakage, meanwhile, the screw is inserted into the through hole, the elastic washer is sleeved on the screw after the screw, and the nut is screwed, when the nut is screwed, the limiting rod is completely retracted into the limiting rod mounting slot, when the bottom end of the nut is abutted against the top end of the elastic washer, the elastic washer is continuously screwed in the tightening direction, when one side of the nut is parallel to the end face of the one end of the limiting rod towards the nut, the one end of the limiting rod can extend out of the limiting rod mounting slot, the other end of the limiting rod stays in the limiting rod mounting slot, and the one end of the limiting rod extending out of the limiting rod mounting slot is abutted against the side of the nut, thereby limiting the nut in the circumferential direction, and the thread anti-loosening function between the screw and the nut is realized. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is a sectional structural schematic view of the utility model;

[0016] Figure 3 It is Figure 2 It is an enlarged schematic view of the structure at A in the middle.

[0017] In the figure: valve body 1, wellhead 2, concrete mounting seat 3, screw rod 4, nut 5, elastic gasket 6, through hole 7, limiting rod mounting groove 8, limiting rod 9, limiting spring 10, lever slot 11, lever 12, sealing groove 13, sealing plate 14, sealing gasket 15. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme of the utility model to carry out clearly, complete description, and the advantage is more clear and distinct, the following combining with the figure to the utility model embodiment carries out further detailed explanation. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all embodiments, only to explain the embodiments of the utility model, and not for limiting the embodiments of the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the scope of the utility model protection.

[0019] Embodiment one: please refer to Figures 1 to 3 The utility model provides a kind of technical scheme: a kind of oil drilling is prevented and sprays device, it include: valve body 1 and wellhead 2, one pipe body and two pipe bodies, the two ends of the valve body 1 are welded with two pipe bodies and two pipe bodies are internally sleeved with second transmission rod, the top of the two pipe bodies one end is installed with latch by installation groove, the bottom of the two pipe bodies is welded with one pipe body and one pipe body is internally sleeved with first transmission rod, the one end of the first transmission rod and the second transmission rod is connected with the head by thread groove, the head one side is fixed with strong magnet by bolt and the outside of strong magnet is installed with corrosion-resistant sealing ring by installation groove, the bottom of the valve body 1 both ends is equipped with reserved groove and is fixed with rotating plug by rotating shaft in the reserved groove, small spring is installed between the rotating plug and the reserved groove by installation groove, the surface of valve body 1 is equipped with several groups of through hole 7, the periphery of wellhead 2 is provided with concrete mounting seat 3, the surface of concrete mounting seat 3 is fixed with several groups of screw rod 4, screw rod 4 is movably inserted in through hole 7, nut 5 is rotatably connected on the surface of screw rod 4, limiting rod mounting groove 8 is opened on the surface of valve body 1, one end of limiting rod 9 is movably inserted in limiting rod mounting groove 8, the other end of limiting rod 9 is abutted on the surface of nut 5, wellhead 2 is movably inserted in the bottom end of valve body 1, the top of wellhead 2 is fixed with sealing gasket 15, sealing gasket 15 is abutted on the inner wall of valve body 1, elastic gasket 6 is sleeved on the rod body of screw rod 4, the bottom end of elastic gasket 6 is abutted on the surface of valve body 1, the top end of elastic gasket 6 is abutted on the surface of nut 5.

[0020] In actual use, personnel install the valve body 1 on the wellhead 2 by using bolts. When blowout occurs, oil or gas spouts into the reserved groove first, pushes the rotating insertion rod to rotate, makes the one end of the rotating insertion rod inserted into the fixed groove to move away from the fixed groove, the one spring pushes the one limiting block to drive the one transmission rod to move, makes the end of the one transmission rod close, seals the inside of the valve body 1 between the one pipe body, personnel pull out the insertion pin, the two spring pushes the two limiting block to drive the two transmission rod to move, makes the end of the two transmission rod close, seals the inside of the valve body 1 between the two pipe body, double sealing, better blowout prevention effect, after the end closes, the strong magnet is attracted, improves the firmness of the closed end, the corrosion-resistant sealing ring can improve the sealing property of the closed end, the sealing ring can seal the one pipe body when the one limiting block moves, the two limiting block moves to seal the two pipe body;

[0021] Before installing the valve body 1 and the wellhead 2, expose the port of the wellhead 2 to the ground, and pour concrete around the port of the wellhead 2. After the concrete is set, the concrete mounting seat 3 is formed, and the screw rod 4 is planted during pouring. When installing the valve body 1 and the wellhead 2, the port of the wellhead 2 is inserted into the bottom end of the valve body 1, the sealing gasket 15 at the top end of the wellhead 2 is pressed against the inner wall of the valve body 1, thereby preventing oil leakage. At the same time, the screw rod 4 is inserted into the through hole 7. After the elastic washer 6 is sleeved on the screw rod of the screw rod 4, the nut 5 is screwed. When the nut 5 is screwed, the limiting rod 9 is completely retracted into the limiting rod mounting groove 8. When the bottom end of the nut 5 abuts against the top end of the elastic washer 6, continue to tighten the elastic washer 6 in the tightening direction. When one side of the nut 5 is parallel to the end face of the end of the limiting rod 9 facing the nut 5, the end of the limiting rod 9 extends out of the limiting rod mounting groove 8, and the other end of the limiting rod 9 stays in the limiting rod mounting groove 8. The end of the limiting rod 9 abuts against the side of the nut 5, thereby limiting the nut 5 in the circumferential direction, and realizing the thread locking function between the screw rod 4 and the nut 5.

[0022] In example two, based on example one, in order to control the position of the limiting rod 9, the limiting rod 9 is in the structure of a rectangular rod body, the bottom end of the limiting rod 9 is fixed with the limiting spring 10, the bottom end of the limiting spring 10 is fixed on the inner wall of the groove body of the limiting rod mounting groove 8, the surface of the valve body 1 is provided with the lever slot 11, the lever 12 is slidably connected in the lever slot 11, one end of the lever 12 extends into the limiting rod mounting groove 8 and is fixed on the surface of the limiting rod 9, and the other end of the lever 12 extends out of the lever slot 11.

[0023] When it is needed to completely retract the limiting rod 9 into the limiting rod installation slot 8, only need to push the push rod 12 downward, the push rod 12 moves downward in the push rod slot 11, which can drive the limiting rod 9 to completely retract into the limiting rod installation slot 8, at this time the limiting spring 10 is compressed; when it is needed to make one end of the limiting rod 9 to extend out of the limiting rod installation slot 8, only need to release the push rod 12, the limiting spring 10 generates upward thrust to the limiting rod 9 under the action of its own elasticity, which can make one end of the limiting rod 9 to extend out of the limiting rod installation slot 8 again.

[0024] In order to prevent sundries from entering the limiting rod installation slot 8 from the push rod slot 11, a sealing slot 13 is arranged on the inner wall of the groove body of the push rod slot 11, one end of a sealing plate 14 is movably inserted into the sealing slot 13, and the other end of the sealing plate 14 extends into the push rod slot 11 and is fixed on the surface of the push rod 12.

[0025] A sealing slot 13 is arranged on the inner wall of the groove body of the push rod slot 11, one end of a sealing plate 14 is movably inserted into the sealing slot 13, and the other end of the sealing plate 14 extends into the push rod slot 11 and is fixed on the surface of the push rod 12, when the push rod 12 moves downward, the sealing plate 14 can be more stored in the sealing slot 13, so as to not affect the movement of the push rod 12.

[0026] In actual use, before the installation between the valve body 1 and the well head 2, the port of the well head 2 is exposed to the ground, and the concrete is poured around the port of the well head 2, and the concrete mounting seat 3 is formed after the concrete is hardened, and the screw rod 4 is planted during the pouring process, when the valve body 1 and the well head 2 are installed, the port of the well head 2 is inserted into the bottom end of the valve body 1, the sealing gasket 15 at the top end of the well head 2 is pressed on the inner wall of the valve body 1, thereby preventing oil leakage, and the screw rod 4 is inserted into the through hole 7, the elastic washer 6 is sleeved on the screw rod of the screw rod 4, and then the nut 5 is screwed, when the nut 5 is screwed, the limiting rod 9 is completely retracted into the limiting rod mounting groove 8, when the bottom end of the nut 5 abuts against the top end of the elastic washer 6, the elastic washer 6 is continuously screwed in the tightening direction, when one side of the nut 5 is parallel to the end face of the end of the limiting rod 9 towards the nut 5, the end of the limiting rod 9 is extended from the limiting rod mounting groove 8, the other end of the limiting rod 9 stays in the limiting rod mounting groove 8, the end of the limiting rod 9 extended from the limiting rod mounting groove 8 abuts against the side of the nut 5, thereby limiting the nut 5 in the circumferential direction, thereby realizing the thread anti-loosening function between the screw rod 4 and the nut 5; when the limiting rod 9 needs to be completely retracted into the limiting rod mounting groove 8, the lever 12 is only needed to be pushed downward, the lever 12 moves downward in the lever slot 11, thereby driving the limiting rod 9 to be completely retracted into the limiting rod mounting groove 8, at this time, the limiting spring 10 is compressed; when the end of the limiting rod 9 needs to be extended from the limiting rod mounting groove 8, the lever 12 is only needed to be loosened, the limiting spring 10 generates upward thrust on the limiting rod 9 under the elastic action of itself, thereby pushing the end of the limiting rod 9 out of the limiting rod mounting groove 8 again; the sealing groove 13 is formed in the groove body wall of the lever slot 11, one end of the sealing plate 14 is movably inserted into the sealing groove 13, the other end of the sealing plate 14 extends into the lever slot 11 to block the lever slot 11 and is fixed on the surface of the lever 12, when the lever 12 moves downward, the sealing plate 14 can be stored more in the sealing groove 13, thereby not affecting the movement of the lever 12.

[0027] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A blowout preventer for use in oil drilling, comprising: The utility model relates to a valve body (1) and wellhead (2), the surface of valve body (1) is seted up with several groups of through -hole (7), it is characterized by: the periphery of wellhead (2) is provided with concrete mounting seat (3), the surface of concrete mounting seat (3) is fixed with several groups of screw rod (4), and screw rod (4) is movably inserted in through -hole (7), and the surface of screw rod (4) is rotatably connected with nut (5), and the surface of valve body (1) is seted up with limit rod installation groove (8), and one end of limit rod installation groove (8) is movably inserted with limit rod (9), and the other end of limit rod (9) is abutted on the surface of nut (5).

2. A blowout preventer according to claim 1, characterized in that: The limit rod (9) is a rectangular rod structure, the bottom end of the limit rod (9) is fixed with a limit spring (10), and the bottom end of the limit spring (10) is fixed on the inner wall of the groove body of the limit rod installation groove (8).

3. A blowout preventer according to claim 1, wherein: The wellhead (2) is movably inserted into the bottom end of the valve body (1), and the top end of the wellhead (2) is fixed with a sealing gasket (15), and the sealing gasket (15) is abutted on the inner wall of the valve body (1).

4. A blowout preventer according to claim 1, wherein: The rod body of the screw rod (4) is sleeved with an elastic gasket (6), the bottom end of the elastic gasket (6) is abutted on the surface of the valve body (1), and the top end of the elastic gasket (6) is abutted on the surface of the nut (5).

5. A blowout preventer according to claim 1, wherein: The surface of the valve body (1) is seted up with a lever slot (11), the lever slot (11) is slidably connected with a lever (12), one end of the lever (12) extends into the limit rod installation groove (8) and is fixed on the surface of the limit rod (9), and the other end of the lever (12) extends out of the lever slot (11).

6. A blowout preventer according to claim 5, wherein: The groove body inner wall of the lever slot (11) is seted up with a sealing groove (13), one end of the sealing groove (13) is movably inserted with a sealing plate (14), and the other end of the sealing plate (14) extends into the lever slot (11) and is fixed on the surface of the lever (12).

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