Blowout preventer for petroleum and natural gas drilling

Abstract

The utility model relates to the technical field of oil and gas well drilling blowout prevention, and discloses an oil and gas well drilling blowout prevention device which comprises a machine shell, a flange plate fixedly connected to the upper side of the machine shell, a connecting base fixedly connected to the lower side of the machine shell and a drill rod arranged on the inner side of the machine shell. The control mechanism is arranged on one side of the flexible flow control mechanism, the flexible flow control mechanism comprises an adjusting frame, the adjusting frame is fixedly connected to the inner side of the machine shell, a base is fixedly connected to the lower side of the adjusting frame, an adjusting cavity is formed in the base, a rotating disc is rotatably connected to the interior of the adjusting cavity, and an inclined groove is formed in the adjusting frame; a multilateral groove is formed in the upper side of the rotary disc, the flexible flow control mechanism is used for preventing blowout of petroleum and natural gas drilling and has the advantages of being simple in structure and fast in response, and the control mechanism is used for controlling the flexible flow control mechanism to control the flow in the drill rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of petroleum and natural gas drilling blowout preventer, concretely is a kind of blowout preventer for petroleum and natural gas drilling. BACKGROUND

[0002] In the operation of petroleum and natural gas drilling, blowout is a serious safety hazard. Blowout usually occurs when the downhole pressure exceeds the control range, and the oil and gas or mud in the well will be quickly sprayed out, resulting in disastrous consequences. In order to deal with this risk, blowout preventer (BOP) is introduced in drilling operation, which is a specially designed safety system that can timely close the wellhead and control the downhole pressure when blowout occurs, preventing oil and gas leakage. Its main function is to quickly close the wellhead when the wellhead pressure is out of control during drilling, prevent oil and gas from being sprayed out or downhole fluid from leaking, and ensure operation safety. BOP is usually installed on the wellhead and consists of multiple sealing and control systems, which can respond to changes in wellhead pressure through different operating modes. The working principle of blowout preventer is based on sealing and pressure control. When blowout risk occurs during drilling, BOP quickly closes the wellhead by activating different types of sealing devices, such as cup-shaped seals and rubber seals, to cut off the release path of downhole pressure. At the same time, blowout preventer is also equipped with various sensors and monitoring equipment to monitor the pressure changes at the wellhead in real time, ensuring timely response to blowout risk. In addition, BOP can also cut off the flow of oil and gas in the well through the parallel configuration of cutters and valve systems when needed. Blowout preventer is not only used in conventional drilling operations, but also plays an important role in deep sea drilling and oil and gas extraction under complex geological conditions.

[0003] This type of device is usually controlled by a hydraulic, pneumatic or electric control system to open and close the blowout preventer through remote operation. The existing device is usually complex to operate, and multiple devices are required to meet the flow reduction or permanent closure of the channel operation. It cannot respond quickly in a short time, and the diameter of the drill pipe is different. The existing device cannot adapt to different diameters of drill pipe for flow reduction or direct flow interruption operation. Therefore, a blowout preventer with high freedom and one-piece is needed. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a blowout preventer for petroleum and natural gas drilling to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a blowout preventer for petroleum and natural gas drilling, comprising a casing, a flange plate fixedly connected to the upper side of the casing, a connecting seat fixedly connected to the lower side of the casing, and a drill pipe arranged in the inner side of the casing. The inner side of the casing is provided with a flexible flow control mechanism and a control mechanism, and the control mechanism is arranged on one side of the flexible flow control mechanism.

[0006] The flexible flow control mechanism includes an adjusting frame fixedly connected to the inner side of the shell, a base fixedly connected to the lower side of the adjusting frame, an adjusting cavity opened in the base, a rotating disc rotatably connected in the adjusting cavity, an inclined groove opened in the adjusting frame, a multi-edge groove opened in the upper side of the rotating disc, a sliding block slidably connected in the multi-edge groove, a cutting knife fixedly connected to the upper side of the sliding block, the cutting knife extending through the inner wall of the base to the inner side of the base, a containing groove fixedly connected to one side of the cutting knife, an opening knife fixedly connected to one side of the cutting knife, a sliding rod fixedly connected to the upper side of the cutting knife, and the sliding rod slidably connected in the inclined groove.

[0007] Preferably, the cutting knives are provided in plurality, and the number of the cutting knives is same as the number of edges of the multi-edge groove.

[0008] Preferably, the sliding block is provided in a square structure.

[0009] Preferably, the containing groove is provided in a size same as that of the opening knife.

[0010] Preferably, the control mechanism includes a control seat fixedly connected to one side of the base, a fan-shaped groove opened in one side of the base, a driving rod slidably connected in the fan-shaped groove, the driving rod being fixedly connected to the rotating disc, an arc-shaped groove opened in the driving rod, a fan-shaped cavity opened in the control seat, a communication cavity opened in the control seat, a piston disc sealingly and slidably connected in the communication cavity, a piston rod fixedly connected to one side of the piston disc, the piston rod extending through the communication cavity to the arc-shaped groove, an adjusting block fixedly connected to one end of the piston rod, a piston cylinder communicated on one side of the communication cavity, and a hydraulic pipe communicated on one side of the piston cylinder.

[0011] Preferably, the piston cylinder is provided in a diameter same as that of the communication cavity.

[0012] Preferably, the arc-shaped structure in the arc-shaped groove is provided in abutment with the outer wall of the adjusting block.

[0013] Compared with the prior art, the utility model provides a blowout preventer for oil and gas drilling, which has the following beneficial effects:

[0014] The flexible flow control mechanism is used for preventing blowout of oil and gas drilling well, the mechanism can reduce the flow rate in the drill rod or cut off the closed channel of the drill rod, thereby avoiding the blowout, the mechanism has the characteristics of simple structure and fast response, the mechanism can center the drill rod to prevent the drill rod from deviating to cause poor sealing effect, the mechanism can flexibly control the flow rate, and the complicated device and time-consuming maintenance are avoided.

[0015] The control mechanism is used for controlling the flexible flow control mechanism to control the flow inside the drill pipe, and when the pressure inside the drill pipe is too large, the control mechanism can quickly control the flexible flow control mechanism to reduce or close the flow inside the drill pipe, so that the danger or pollution is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0017] Figure 1 It is a structural schematic diagram of the present application;

[0018] Figure 2 It is a structural schematic diagram of the present application from another perspective;

[0019] Figure 3 It is a sectional view structural schematic diagram of the present application;

[0020] Figure 4 It is a structural schematic diagram of the cutting knife in the present application;

[0021] Figure 5 It is a structural schematic diagram of the control seat in the present application.

[0022] In the drawings: 1, the shell; 2, the flange plate; 3, the connecting seat; 4, the drill pipe; 5, the flexible flow control mechanism; 501, the adjusting frame; 502, the base; 503, the adjusting cavity; 504, the rotating disc; 505, the inclined chute; 506, the multi-edge slot; 507, the sliding block; 508, the cutting knife; 509, the containing groove; 510, the opening knife; 511, the sliding rod; 6, the control mechanism; 601, the control seat; 602, the fan-shaped slot; 603, the driving rod; 604, the arc-shaped slot; 605, the fan-shaped cavity; 606, the communication cavity; 607, the piston disc; 608, the piston rod; 609, the adjusting block; 610, the piston cylinder; 611, the hydraulic pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0024] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be direct connection, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model.

[0025] Embodiment one: the mechanism is used to provide control for flexible flow control mechanism 5, which solves the problem of existing device adjustment inflexibility, please refer to Figures 1-5 The utility model provides a kind of technical scheme: a blowout preventer for petroleum and natural gas drilling, including shell 1, the flange plate 2 of shell 1 upper side fixed connection, the connecting seat 3 of shell 1 lower side fixed connection and the drill pipe 4 of shell 1 inside setting, shell 1 inside is provided with flexible flow control mechanism 5 and control mechanism 6, control mechanism 6 is arranged at one side of flexible flow control mechanism 5;

[0026] Flexible flow control mechanism 5 includes adjusting frame 501, adjusting frame 501 is fixedly connected in shell 1, adjusting frame 501 lower side is fixedly connected with base 502, base 502 is internally provided with adjusting cavity 503, adjusting cavity 503 is rotatably connected with rotating disc 504, adjusting frame 501 is internally provided with inclined groove 505, rotating disc 504 upper side is provided with multiple side slot 506, multiple side slot 506 is slidably connected with sliding block 507, sliding block 507 upper side is fixedly connected with cutting knife 508, cutting knife 508 inside extends to base 502 inside through base 502 inner wall, cutting knife 508 one side is fixedly connected with containing groove 509, cutting knife 508 one side is fixedly connected with opening knife 510, cutting knife 508 upper side is fixedly connected with sliding rod 511, sliding rod 511 is slidably connected in inclined groove 505.

[0027] Further, cutting knife 508 is provided with multiple, and the number of cutting knife 508 is the same as the number of multiple side slot 506.

[0028] Further, sliding block 507 is provided with square mechanism.

[0029] Further, containing groove 509 is provided with the same size as the structure size of opening knife 510.

[0030] Embodiment two: the mechanism is used to reduce or cut off the internal passage of drill pipe 4, which solves the problem of insufficient response speed and difficult maintenance of existing device, please refer to Figures 1-5And combined with embodiment one, further get, control mechanism 6 includes control seat 601 and fan-shaped groove 602, control seat 601 fixedly connected on the one side of base 502, fan-shaped groove 602 is set up on the one side of base 502, fan-shaped groove 602 inside slidingly connected with drive rod 603, drive rod 603 is fixedly connected with rotary disc 504, arc-shaped groove 604 is set up in drive rod 603, fan-shaped cavity 605 is set up in control seat 601, communication cavity 606 is set up in control seat 601, piston disc 607 is sealingly and slidably connected in communication cavity 606, piston rod 608 is fixedly connected on the one side of piston disc 607, piston rod 608 one end extends to the inside of arc-shaped groove 604 and passes through communication cavity 606, adjusting block 609 is fixedly connected on the end of piston rod 608, piston cylinder 610 is communicatedly arranged on the one side of communication cavity 606, hydraulic pipe 611 is communicatedly arranged on the one side of piston cylinder 610.

[0031] Further, the inside diameter of piston cylinder 610 is same with the diameter of communication cavity 606.

[0032] Further, the arc-shaped structure in arc-shaped groove 604 is arranged in conjunction with the outer wall of adjusting block 609.

[0033] In actual operation process, when the device is used, the user installs the device according to the original device position, the user connects hydraulic pipe 611 to hydraulic drive, when the pressure in the well is abnormal, the user can control piston disc 607 to slide through hydraulic pressure, piston disc 607 pushes piston rod 608 to make drive rod 603 rotate around base 502, rotary disc 504 rotates to push cutting-off knife 508, because the moving track of cutting-off knife 508 is fixed, opening knife 510 first contacts the surface of drill rod 4, opening knife 510 cuts drill rod 4, then cutting-off knife 508 can continuously cut drill rod 4 until closing drill rod 4.

[0034] It should be noted that, in this text, such as first and second relationship terms, only to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment. Without more limitations, the element defined by the statement "including a......" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

Claims

1. An oil and gas drilling blowout preventer, comprising a casing (1), a flange plate (2) fixedly connected to the upper side of the casing (1), a connecting seat (3) fixedly connected to the lower side of the casing (1), and a drill pipe (4) arranged in the inner side of the casing (1), characterized in that: The flexible flow control mechanism (5) is provided with an adjusting frame (501) fixedly connected to the inner side of the shell (1), a base (502) fixedly connected to the lower side of the adjusting frame (501), an adjusting cavity (503) formed in the base (502), a rotating disc (504) rotatably connected to the adjusting cavity (503), an inclined groove (505) formed in the adjusting frame (501), a multi-sided groove (506) formed in the upper side of the rotating disc (504), a sliding block (507) slidably connected to the multi-sided groove (506), a cutting knife (508) fixedly connected to the upper side of the sliding block (507), the cutting knife (508) extending through the inner wall of the base (502) to the inner side of the base (502), a containing groove (509) fixedly connected to one side of the cutting knife (508), an opening knife (510) fixedly connected to one side of the cutting knife (508), a sliding rod (511) fixedly connected to the upper side of the cutting knife (508), and the sliding rod (511) slidably connected to the inclined groove (505). The cutting knives (508) are provided in a plurality of numbers, and the number of the cutting knives (508) is the same as the number of sides of the multi-sided groove (506).

2. The blowout preventer according to claim 1, characterized in that: The sliding block (507) is provided with a square cross section.

3. The blowout preventer according to claim 1, characterized in that: The containing groove (509) is formed in the same size as the structure of the opening knife (510).

4. The blowout preventer according to claim 1, characterized in that: The control mechanism (6) comprises a control seat (601) and a fan-shaped groove (602), the control seat (601) is fixedly connected to one side of the base (502), the fan-shaped groove (602) is formed in one side of the base (502), the fan-shaped groove (602) is slidably connected with a driving rod (603), the driving rod (603) is fixedly connected with the rotating disc (504), the driving rod (603) is formed with an arc-shaped groove (604) inside, the control seat (601) is formed with a fan-shaped cavity (605) inside, the control seat (601) is formed with a communication cavity (606) inside, the communication cavity (606) is sealingly slidably connected with a piston disc (607), one side of the piston disc (607) is fixedly connected with a piston rod (608), one end of the piston rod (608) extends into the arc-shaped groove (604) through the communication cavity (606), the end of the piston rod (608) is fixedly connected with an adjusting block (609), one side of the communication cavity (606) is connected with a piston cylinder (610), and one side of the piston cylinder (610) is connected with a hydraulic pipe (611).

5. The blowout preventer according to claim 1, characterized in that: The inner diameter of the piston cylinder (610) is the same as the diameter of the communication cavity (606).

6. The blowout preventer according to claim 5, characterized in that: The arc-shaped structure inside the arc-shaped groove (604) is arranged in abutment with the outer wall of the adjusting block (609).

7. The blowout preventer according to claim 5, characterized in that: ​

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