A blowout prevention workover machine

Abstract

The utility model discloses a blowout prevention workover machine, comprising a housing, a casing is fixedly installed on the inner top of the housing, a rod is arranged in the casing, the rod is slidably connected with the casing, a baffle is fixedly installed on the lower end of the rod, a sealing mechanism is arranged between the baffle and the housing; a through hole for reducing the pressure of oil pressure on the baffle is opened on the baffle, and a plurality of connecting plates are arranged at equal intervals between the through hole and the baffle. The advantages are: the oil pressure is dispersed outward through the through hole, reducing the pressure of the oil pressure on the baffle, and at the same time, the liquid is sprayed out through the outlet to counteract the liquid of the blowout, thereby reducing the impact on the baffle.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum tools, in particular to a blowout prevention workover machine. Background Art

[0002] Oil and gas fields are controlled by a variety of geological factors. During oil field operations, flowing formation fluids will cause wellhead pressure to rise, and natural gas or crude oil leakages often occur, and even well kicks and blowouts occur, which bring serious safety hazards to well repair production. Not only does it cause energy waste, but it also causes serious pollution to the surrounding environment. Therefore, blowout prevention is a crucial safety measure for well repair rigs during well repair operations. Blowout refers to an accident in which drilling fluid or underground oil and gas sprays out of the wellhead due to overpressure in the underground wellbore during the drilling, completion, repair and oil production of oil and gas wells;

[0003] The patent number "CN210178320U" discloses an oilfield drilling and repair blowout prevention device. When a blowout occurs, the oil pressure in the oil well will push the fixed plug to move upward. The fixed plug pushes the second fixed block to move upward through the connecting plate. Through the cooperation of the third fixed block, the roller and the slide groove, the second fixed block drives the pull rod to move upward, so that the fixed plug fits with the limit block, and the fixed column is inserted into the first groove. The sealing gasket will fit with the inner wall of the shell to seal the inside of the shell, thereby preventing oil from spraying out, avoiding safety hazards to producers and pollution to the surrounding environment, and reducing energy waste. However, the above patent does not restrict the up and down movement of the rod body. When the pressure is small, the rod body resets under the action of the spring, but a small amount of high-pressure liquid will still be sprayed out, and the sealing cannot be guaranteed, and leakage still exists. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a blowout prevention workover machine.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A blowout prevention workover machine comprises a shell, a casing is fixedly installed on the inner top of the shell, a rod body is arranged in the casing, the rod body is slidably connected with the casing, a baffle is fixedly installed on the lower end of the rod body, and a sealing mechanism is arranged between the baffle and the shell; a through hole for reducing the pressure of oil pressure on the baffle is provided on the baffle, a plurality of connecting plates are arranged at equal intervals between the through hole and the baffle, the sealing mechanism comprises a sealing protrusion fixedly installed on the upper end of the baffle, a sealing groove matched with the sealing protrusion is provided on the inner bottom of the shell, two piston cavities are symmetrically provided on the inner top of the sealing groove, a piston rod is slidably connected inside the piston cavity, the piston rod is fixedly connected with the sealing protrusion, two push cavities are symmetrically provided on the inner side of the shell, the push cavities are communicated with the piston cavity, a sealing plate is slidably connected inside the push cavities, two limiting grooves matched with the sealing plate are symmetrically provided on the outer side of the rod body, and the upper side of one end of the sealing plate facing the rod body is an inclined structure.

[0007] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: the inlet of the through hole is the inner wall of the baffle, and the outlet is the lower end surface of the baffle.

[0008] The advantages of the utility model are: the oil pressure is dispersed outwards through the through hole, reducing the pressure of the oil pressure on the baffle, and at the same time the liquid is sprayed out through the outlet to collide with the liquid in the blowout, reducing the impact on the baffle; the sealing protrusion is inserted into the sealing groove to achieve the purpose of sealing, thereby forming a sealing structure and effectively avoiding leakage; under the action of air pressure, the piston rod moves to push the sealing plate to move, and when the sealing plate is inserted into the limiting groove, a limiting effect is achieved, thereby ensuring the stability of the rod body and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a structural schematic diagram of a blowout prevention workover rig proposed by the utility model;

[0010] Figure 2 A cross-sectional view of a blowout prevention workover rig proposed by the utility model;

[0011] Figure 3 The utility model is a cross-sectional schematic diagram of a baffle of a blowout prevention workover rig.

[0012] In the figure: 1 housing, 2 sleeve, 3 rod body, 4 baffle, 5 piston chamber, 6 push chamber, 7 sealing plate, 8 limiting groove, 9 piston rod, 10 sealing groove, 11 sealing protrusion, 12 through hole, 13 connecting plate. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0014] Reference Figure 1-Figure 3 As shown, a blowout prevention workover machine comprises a shell 1, a casing 2 is fixedly installed on the inner top of the shell 1, a rod 3 is arranged in the casing 2, the rod 3 is reset by a power device, the driving device can be a hydraulic cylinder, and can also be replaced by any other power device that can drive the rod 3 to reset, such as a cylinder, an electric cylinder and other power devices with a driving function, the rod 3 is slidably connected with the casing 2, a baffle 4 is fixedly installed on the lower end of the rod 3, a sealing mechanism is arranged between the baffle 4 and the shell 1, the sealing mechanism comprises a sealing protrusion 11 fixedly installed on the upper end of the baffle 4, a sealing groove 10 adapted to the sealing protrusion 11 is provided at the inner bottom of the shell 1, two piston chambers 5 are symmetrically provided on the inner top of the sealing groove 10, and a piston is slidably connected inside the piston chamber 5 Rod 9, piston rod 9 is fixedly connected with sealing protrusion 11, two push chambers 6 are symmetrically provided on the inner side of shell 1, push chamber 6 is communicated with piston chamber 5, and sealing plate 7 is slidably connected inside push chamber 6, two limiting grooves 8 matched with sealing plate 7 are symmetrically provided on the outer side of rod body 3, and the upper side of sealing plate 7 facing one end of rod body 3 is inclined structure; baffle 4 is provided with through hole 12 for reducing the pressure of oil pressure on baffle 4, and multiple connecting plates 13 are arranged at equal intervals between through hole 12 and baffle 4, the inlet of through hole 12 is the inner wall of baffle 4, and the outlet is the lower end face of baffle 4, so that oil pressure is dispersed outward through through hole 12, reducing the pressure of oil pressure on baffle 4, and at the same time, liquid is ejected through the outlet to counteract with the liquid of blowout, so as to reduce the impact force on baffle 4.

[0015] When a blowout occurs, the high-pressure liquid pushes the baffle 4 upward, so that the baffle 4 fits against the lower end surface of the shell 1, and the sealing protrusion 11 is inserted into the sealing groove 10 to achieve the purpose of sealing, thereby forming a sealing structure; during the upward movement of the baffle 4, the piston rod 9 moves accordingly. Since the piston rod 9 and the sealing plate 7 are in an airtight space, the movement of the piston rod 9 will squeeze the sealing plate 7 to move under the action of air pressure. When the sealing plate 7 is aligned with the limiting groove 8, the sealing plate 7 is inserted into the limiting groove 8 to limit the rod body 3, thereby ensuring the stability of the rod body 3, thereby improving the sealing effect and avoiding leakage; when the oil pressure drops, the rod body 3 is reset under the action of the driving device. Due to the inclined structural design of the sealing plate 7, the rod body 3 can be directly moved downward for reset.

Claims

1. A blowout prevention workover rig, comprising a housing (1), characterized in that: A sleeve (2) is fixedly mounted on the inner top of the housing (1), a rod body (3) is arranged inside the sleeve (2), the rod body (3) is slidably connected to the sleeve (2), a baffle (4) is fixedly mounted on the lower end of the rod body (3), a sealing mechanism is arranged between the baffle (4) and the housing (1); a through hole (12) is provided on the baffle (4) for reducing the pressure of the oil pressure on the baffle (4), a plurality of connecting plates (13) are arranged at equal intervals between the through hole (12) and the baffle (4), the sealing mechanism comprises a sealing protrusion (11) fixedly mounted on the upper end of the baffle (4), and a sealing protrusion (11) is provided on the inner bottom of the housing (1) for contacting with the sealing protrusion (11). The sealing groove (10) is matched with the protrusion (11), the inner top of the sealing groove (10) is symmetrically provided with two piston chambers (5), the interior of the piston chamber (5) is slidably connected with a piston rod (9), the piston rod (9) is fixedly connected to the sealing protrusion (11), the inner side of the housing (1) is symmetrically provided with two push chambers (6), the push chamber (6) is communicated with the piston chamber (5), the interior of the push chamber (6) is slidably connected with a sealing plate (7), the outer side of the rod body (3) is symmetrically provided with two limiting grooves (8) matched with the sealing plate (7), and the upper side of one end of the sealing plate (7) facing the rod body (3) is an inclined structure.

2. A blowout prevention workover rig according to claim 1, characterized in that: The inlet of the through hole (12) is the inner wall of the baffle (4), and the outlet is the lower end surface of the baffle (4).

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