CN210564447U

CN210564447U - Hydraulic well plugging device

Info

Publication number: CN210564447U
Application number: CN201921129969.3U
Authority: CN
Inventors: 李自广; 王依明; 刘喜才; 王新; 宗珊珊
Original assignee: Puyang Yuanheng Litong Petroleum Machinery Co ltd
Current assignee: Puyang Yuanheng Litong Petroleum Machinery Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-05-19
Anticipated expiration: 2029-07-18

Abstract

The utility model relates to oil equipment additional field, concretely relates to hydraulic pressure blowout preventer. The device comprises a cylinder body, flanges coaxial with the cylinder body are fixed at the upper end and the lower end of the cylinder body, a baffle ring is fixed at the lower end in the cylinder body, a rubber conical sealing sleeve coaxial with the cylinder body is fixed at the upper end of the baffle ring, a taper sleeve is sleeved at the upper end of the rubber conical sealing sleeve, a conical surface at the inner edge of the taper sleeve is in contact with a conical surface at the outer edge of the rubber conical sealing sleeve, and driving devices for driving the taper sleeve to move up and down are arranged at the left. The utility model discloses, it realizes sealing the well through the taper sleeve to cramp rubber toper seal cover and seals, and when rubber toper seal cover inner edge was sealed with oil pipe or sucker rod, rubber toper seal cover inner edge prolonged its circumferencial direction's sealing dynamics even, and sealing performance is good, changes the length of taper sleeve cover on rubber toper seal cover through twisting the nut simultaneously, and then changes the sealing dynamics of rubber toper seal cover to oil pipe or sucker rod, makes the utility model discloses can be applicable to the oil well of different pressure.

Description

Hydraulic well plugging device

Technical Field

The utility model relates to oil equipment additional field, concretely relates to hydraulic pressure blowout preventer.

Background

The well sealer is used for sealing the annular space of the oil jacket of the well mouth in the process of pulling out and putting in the pipe string by an oil field operation team. At present, in the process of workover operation of each oil field, three wellhead blowout preventers are used: one is a self-sealing blowout preventer, the maximum working pressure is within 3Mpa, realize the seal to the oil jacket annular space of well head by the elastic deformation of the rubber core in the blowout preventer, its rubber core is when taking the lower limb, produce the plastic deformation and lose elasticity easily, make the sealing performance reduce, only play the role of the mud scraper at this moment, do not play a sealing role, its rubber core has extremely short service life; one is a semi-seal blowout preventer, the maximum working pressure is within 8Mpa, the seal rubber generates axial deformation to realize the seal of the annular space of the wellhead oil sleeve by the rotation of the adjusting screw rods at the two ends of the blowout preventer, which is a static seal, and the operation of pulling out and setting off the pipe column can not be carried out at the moment; the other is a full-sealing blowout preventer, which seals the annular space of the wellhead oil sleeve by the axial deformation of a sealing rubber sheet by the rotation of an adjusting screw rod at one end of the blowout preventer, and is only suitable for sealing the wellhead of an empty shaft, and at the moment, the shaft cannot be provided with a pipe column. The existing hydraulic blowout preventer generally compresses the upper end or the lower end of a rubber sleeve, the sealing rubber sleeve generates radial deformation after being compressed to reach the annular space of a sealing oil sleeve, and because the sealing rubber sleeve is converted into radial deformation after being compressed by the upper end or the lower end, the radial deformation of the sealing rubber sleeve is unstable, the sealing effect of the sealing rubber sleeve along the circumference of the inner edge of the sealing rubber sleeve is different, and when the pressure in an oil well is high, the problem of untight sealing is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that sealing performance is good, and sealing performance can be adjusted according to the oil well of different pressure, the wide hydraulic pressure blowout preventer of application scope.

In order to realize the purpose, the utility model provides a technical scheme is:

a hydraulic well plugging device comprises a cylinder body, flanges coaxial with the cylinder body are fixed at the upper end and the lower end of the cylinder body, a baffle ring is fixed at the lower end in the cylinder body, a rubber conical sealing sleeve coaxial with the cylinder body is fixed at the upper end of the baffle ring, a conical sleeve is sleeved at the upper end of the rubber conical sealing sleeve, a conical surface at the inner edge of the conical sleeve is contacted with a conical surface at the outer edge of the rubber conical sealing sleeve, driving devices for driving the conical sleeve to move up and down are arranged at the left side and the right,

the driving device comprises a first groove arranged on the inner edge of the cylinder body, a fixed rod is arranged in the first groove, one end of the fixed rod is fixedly connected with the taper sleeve, a first spring is arranged between the fixed rod and the bottom of the first groove, a vertical oil cavity is formed in the cylinder body below the first groove, a slide rod is arranged in the oil cavity in a sliding mode, the upper end of the slide rod penetrates out of the oil cavity and extends into the first groove, the part of the slide rod extending into the first groove penetrates through the fixed rod, a nut is connected onto the slide rod above the fixed rod in a threaded mode, a second groove which is communicated with the first groove and corresponds to the nut is formed in the outer edge of the cylinder body, a piston connected with the oil cavity in a sliding and sealing mode is fixed on the slide rod in the oil cavity, a limiting ring is fixed on the slide rod above the piston and is in contact with the upper end face of the oil cavity, an oil.

Specifically, the front groove wall and the rear groove wall of the first groove on the front end surface and the rear end surface of the fixed rod are in sliding contact.

Specifically, the lower end of the sliding rod is connected with the lower end face of the oil cavity through a second spring.

Specifically, the oil inlet pipe is provided with a valve.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses, simple structure, convenient operation cramps through the taper sleeve to rubber cone seal cover and realizes sealing the well and seal, and when rubber cone seal cover inner edge was sealed with oil pipe or sucker rod, rubber cone seal cover inner edge prolonged its circumferencial direction's sealing force degree even, and sealing performance is good, changes the length of taper sleeve cover on rubber cone seal cover through twisting the nut simultaneously, and then changes the sealing force degree of rubber cone seal cover to oil pipe or sucker rod, makes the utility model discloses can be applicable to the oil well of different pressure.

When the rubber conical sealing sleeve is worn, the length of the conical sealing sleeve sleeved on the rubber conical sealing sleeve can be changed by screwing the screw cap, so that the sealing force of the rubber conical sealing sleeve on an oil pipe or an oil pumping rod is changed, the service life of the rubber conical sealing sleeve is prolonged, and the maintenance cost and the maintenance frequency are reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in figure 1, the hydraulic well plugging device comprises a cylinder body 2, flanges 1 which are coaxial with the cylinder body 2 are fixed at the upper end and the lower end of the cylinder body 2, a baffle ring 4 is fixed at the lower end of the inside of the cylinder body 2, a rubber conical sealing sleeve 5 which is coaxial with the cylinder body 2 is fixed at the upper end of the baffle ring 4, a conical sleeve 3 is sleeved at the upper end of the rubber conical sealing sleeve 5, the conical surface of the inner edge of the conical sleeve 3 is in contact with the conical surface of the outer edge of the rubber conical sealing sleeve 5, and driving devices for driving the conical sleeve 3 to move up and down.

The driving device comprises a first groove 6 arranged on the inner edge of the barrel body 2, a fixed rod 7 is arranged in the first groove 6, the front and rear groove walls of the first groove 6 are in sliding contact with the front and rear end surfaces of the fixed rod 7, one end of the fixed rod 7 is fixedly connected with the taper sleeve 3, a first spring 9 is arranged between the fixed rod 7 and the groove bottom of the first groove 6, a vertical oil cavity 15 is arranged on the barrel body 2 below the first groove 6, a slide rod 8 is arranged in the oil cavity 15 in a sliding manner, the upper end of the slide rod 8 penetrates out of the oil cavity 15 and extends into the first groove 6, the part of the slide rod 8 extending into the first groove 6 penetrates through the fixed rod 7, a nut 10 is in threaded connection with the slide rod 8 above the fixed rod 7, a second groove 17 which is communicated with the first groove 6 and corresponds to the nut 10 is arranged on the outer edge of the barrel body 2, a piston 14 which is in sliding sealing connection with the, the limiting ring 13 is in contact with the upper end face of the oil cavity 15, the lower end of the sliding rod 8 is connected with the lower end face of the oil cavity 15 through a second spring 16, an oil inlet channel 12 communicated with the oil cavity 15 is formed in the cylinder body 2, the oil inlet channel 12 is located above the piston 14, an oil inlet pipe 11 communicated with the oil inlet channel 12 is fixed on the cylinder body 2, and a valve is arranged on the oil inlet pipe 11.

When carrying out the well sealing operation, usable hydraulic pump or manual hydraulic pump are through advancing into

oil pipe

11 and 12 oil pockets 14 of inlet channel and injecting hydraulic oil, piston 14 drive slide bar 8 is gone down this moment, slide bar 8 passes through dead lever 7 drive taper sleeve 3 and is gone down, because the conical surface of taper sleeve 3 inner edge and the conical surface contact of rubber toper seal cover 5 outer fringe, along with the going down of taper sleeve 3, the length of taper sleeve 3 cover on rubber toper seal cover 5 increases gradually, rubber toper seal cover 5 is gradually to its central contraction and seals oil pipe or sucker rod, after the pressure release, first spring 9 and second spring 16 can make dead lever 7 and slide bar 8 go upward, rubber toper seal cover 5 withdraws from taper sleeve 3 gradually, carry out the deblocking to the oil well this moment. Compare with among the prior art through extrusion packing element upper end or lower extreme for carry out the hydraulic pressure blowout preventer that seals after packing element takes place radial deformation, the utility model discloses make the power of 5 radial deformations of rubber cone seal cover more direct, the radial atress of 5 radial of rubber cone seal covers is more even simultaneously, can guarantee effectual sealedly.

The wrench is extended into the first groove 6 through the second groove 17, the nut 10 is screwed downwards, the limiting ring 13 is fixed on the sliding rod 8 above the piston 14, the limiting ring 13 is in contact with the upper end face of the oil cavity 15, when the nut 10 is screwed downwards, the position of the sliding rod 8 does not change under the blocking effect of the limiting ring 13, the length of the conical sleeve 3 sleeved on the rubber conical sealing sleeve 5 is continuously increased in the downwards process of the nut 10, the inner diameter of the rubber conical sealing sleeve 5 is changed, under the condition that the fixing rod 7 drives the conical sleeve 3 to move downwards for the same distance, the inner edge of the rubber conical sealing sleeve 5 can have larger pressure on an oil pipe or an oil pumping rod, and the nut is suitable for oil wells with higher pressure.

When the rubber conical seal 5 is worn, the length of the conical sleeve 3 sleeved on the rubber conical seal sleeve 5 is changed by screwing the screw cap 10, and under the condition that the fixing rod 7 drives the conical sleeve 3 to move downwards for the same distance, the pressure of the rubber conical seal sleeve 5 on an oil pipe or an oil pumping rod is increased, so that the sealing effect is ensured, the service life of the rubber conical seal sleeve 5 can be prolonged, and the maintenance cost and the maintenance frequency are reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A hydraulic well sealer comprises a cylinder body (2), wherein flanges (1) coaxial with the cylinder body are fixed at the upper end and the lower end of the cylinder body (2), and is characterized in that a baffle ring (4) is fixed at the lower end inside the cylinder body (2), a rubber conical sealing sleeve (5) coaxial with the cylinder body (2) is fixed at the upper end of the baffle ring (4), a conical sleeve (3) is sleeved at the upper end of the rubber conical sealing sleeve (5), a conical surface at the inner edge of the conical sleeve (3) is contacted with a conical surface at the outer edge of the rubber conical sealing sleeve (5), driving devices for driving the conical sleeve (3) to move up and down are arranged at the left side and the right side of the,

the driving device comprises a first groove (6) arranged at the inner edge of the barrel body (2), a fixed rod (7) is arranged in the first groove (6), one end of the fixed rod (7) is fixedly connected with the taper sleeve (3), a first spring (9) is arranged between the fixed rod (7) and the bottom of the first groove (6), a vertical oil cavity (15) is formed in the barrel body (2) below the first groove (6), a sliding rod (8) is arranged in the oil cavity (15) in a sliding mode, the upper end of the sliding rod (8) penetrates out of the oil cavity (15) and extends into the first groove (6), the part of the sliding rod (8) extending into the first groove (6) penetrates through the fixed rod (7), a nut (10) is connected to the sliding rod (8) above the fixed rod (7) in a threaded mode, a second groove (17) which is communicated with the first groove (6) and corresponds to the nut (10) is formed in, a piston (14) connected with the oil cavity (15) in a sliding and sealing mode is fixed on a sliding rod (8) in the oil cavity (15), a limiting ring (13) is fixed on the sliding rod (8) above the piston (14), the limiting ring (13) is in contact with the upper end face of the oil cavity (15), an oil inlet channel (12) communicated with the oil cavity (15) is formed in a barrel body (2), the oil inlet channel (12) is located above the piston (14), and an oil inlet pipe (11) communicated with the oil inlet channel (12) is fixed on the barrel body (2).

2. The hydraulic blowout preventer according to claim 1, wherein the front and rear groove walls of the first groove (6) on the front and rear end surfaces of the fixing rod (7) are in sliding contact.

3. The hydraulic blowout preventer according to claim 1, wherein the lower end of the slide rod (8) is connected with the lower end surface of the oil chamber (15) by a second spring (16).

4. A hydraulic blowout preventer according to claim 1, wherein a valve is arranged on the oil inlet pipe (11).