CN213684064U - Oil layer hot washing double-protection device - Google Patents

Abstract

The utility model discloses an oil layer hot washing double-protection device, which comprises a leather cup sealing anchoring device and a rubber cylinder sealing anchoring device, wherein the upper end of the rubber cylinder sealing anchoring device is connected with the lower end of the leather cup sealing anchoring device; the packing element seals anchor includes: the upper end of the lower central pipe is connected with an upper central pipe of the leather cup sealing anchoring device; the rubber cylinder assembly is sleeved outside the lower central pipe; the lower end of the connecting sleeve is connected with the rubber cylinder assembly; the hydraulic unidirectional thrust mechanism is arranged in the connecting sleeve and is integrally positioned above the rubber cylinder assembly, and the hydraulic unidirectional thrust mechanism is provided with a pressure transfer hole communicated with the lower central tube. The utility model is used for the construction is washed to the heat of oil well, prolongs the effective hot number of times of washing and shortens the drainage phase of hot washing back oil well.

Description

Oil layer hot washing double-protection device

Technical Field

The utility model belongs to the technical field of the supporting instrument of oil field oil well pit shaft technique and specifically relates to a two protection device are washed to oil reservoir heat.

Background

The oil well needs to be regularly washed in the production process so as to achieve the purposes of paraffin removal, pump efficiency improvement and pump detection period prolonging. Along with the exploitation of an oil well, the pressure of an oil layer is continuously reduced in the middle and later production periods of the oil well, and in the hot washing process, well washing liquid can seriously enter a stratum due to stratum leakage, so that the stratum is polluted, the effect and purpose of hot washing application cannot be achieved, and a well washing protector is needed.

The existing well washing protector is a leather cup seal, and has two defects: firstly, the sealing performance is poor, and the influence of well deviation and casing smoothness is large; secondly, the validity period is short, the leather cup seal can be damaged and lose efficacy after multiple times of well washing, and the service life is short.

Publication (bulletin) No.: CN2883655Y publication (announcement) day: 2007-03-28 a reservoir protection anchor. The packer mainly solves the problem that the existing tubing anchor and the packer which does not press the oil layer by hot washing are separated. A valve ball is arranged in an upper joint of a central tube, a rubber tube is sleeved below the upper joint of the central tube, an upper cone and a lower cone are sleeved on the central tube at the lower end of the rubber tube, an anchor block is arranged on the central tube between the upper cone and the lower cone, a male screw is connected to the central tube at the lower end of the lower cone through a pin, a female screw is connected to the outside of the male screw through a screw thread, at least 4 friction blocks are uniformly clamped between the lower cone and the female screw, and a leaf spring is arranged between the friction blocks and. The oil layer protection anchor has the characteristics of downhole work with dual functions of an oil pipe anchor and a hot-washing packer without pressing the oil layer.

Publication (bulletin) No.: CN109751011A, publication (public notice) day: 2019-05-14 provide a hot-washing paraffin removal packer, including along setting up compression packing element and expansion packing element outside the center tube from top to bottom, compression packing element realizes the seat and seals when the liquid pressure in the oil pipe rises, and be equipped with the retaining structure and make it keep in the state of setting, expansion packing element realizes the seat and seals after the flushing fluid is injected into the annular space, can inject the flushing fluid into the annular space and carry out the well-flushing operation after compression packing element sets up, the flushing fluid can not get into the oil reservoir, has protected the oil reservoir, the double seat seals can guarantee to set up the effect more reliable simultaneously. In addition, the unique annular cavity design and the unlocking structure enable the retaining structure to be unlocked after flushing fluid enters the annular cavity, once the flushing fluid stops injecting, the compression rubber cylinder and the expansion rubber cylinder can automatically rebound, namely, the packer can automatically unlock after flushing is completed, additional operations such as lifting an oil pumping pipe column are not needed, normal production of an oil well is guaranteed without interruption while flushing is completed, and meanwhile, the hot-washing paraffin removal packer can be repeatedly used underground.

Publication (bulletin) No.: CN206233902U, publication (public notice) day: 2017-06-09 discloses an oil layer hot washing protector, which comprises: the packer still includes: the overflow pipe, the sliding rotating pipe, the sealing leather cup and the check valve; the overflow pipe is connected with an oil pipe and is connected with the packer in a downward mode, the oil pipe and a sleeve on the outer side of the oil pipe form an annular space, and the overflow pipe is provided with an overflow hole; the self-sealing leather cup is arranged on the sliding rotary pipe, the upper end of the sliding rotary pipe is connected with the packer, and the check valve is arranged at the upper end of the inner side of the sliding rotary pipe. The oil layer hot washing protector has the following beneficial effects: 1) other equipment and additional processes are not required to be additionally arranged, the construction is simple, the application is wide, and the method is suitable for an oil well with small casing deformation; 2) the pollution of the stratum by a well washing medium can be avoided, and the problem that the oil well cannot produce oil or is difficult to produce oil after hot washing is avoided; 3) is suitable for various well washing media, and reduces the well washing difficulty.

Publication (bulletin) No.: CN201148843Y, publication (public notice) day: 2008-11-12 can hot wash the compound tubular column of water shutoff of formula of protecting oil reservoir, is one kind and is applied to the hot washing process in the oil well, to the compound tubular column of water shutoff of the protective action of oil reservoir. By releasing joint, packer and single current valve to and oil pipe constitutes, the characteristic is: the lower end of the oil pipe is connected with a releasing joint, and the lower end of the releasing joint is connected with an upper packer. The lower end of the upper packer is connected with an oil pipe, the lower end of the oil pipe is connected with a lower packer, and the lower end of the lower packer is connected with the oil pipe. The lower end of the oil pipe is connected with a check valve. The upper packer is positioned above the water zone. The lower packer is positioned between the water zone and the oil zone. The effect is as follows: the string remains downhole and does not affect the production string. The water layer can be blocked, and the oil layer supplies oil to the production string. When the well needs to be washed by heat, the hot washing liquid or the well killing liquid is blocked by the packer and the check valve, and cannot enter an oil layer to cause pollution, so that the aim of protecting the oil layer is fulfilled.

Publication (bulletin) No.: CN2763496Y, publication (public notice) day: 2006-03-08 relates to an oil layer protector for preventing the pollution of flushing fluid, belonging to a special oil well-bore tool. At present, during hot well, flushing fluid enters the stratum, causing pollution. The oil layer protector is formed by connecting an upper joint, a valve body, a supporting pipe and a lower joint, and is characterized in that an eccentric body is arranged in an inner cavity of the valve body, the eccentric body is provided with an eccentric channel, the upper part of the eccentric body is a funnel-shaped guide surface, a ball seat is arranged at the lower part of the eccentric body, one side of the ball seat is the eccentric channel, the other side of the ball seat is an inclined plane entity, and an inclined side hole is formed in the valve. When the wax is cleaned by hot washing, the leather cup is sealed, hot washing liquid enters the eccentric body from the annular space, the eccentric ball rolls on the ball seat, the hot washing liquid is prevented from flowing downwards, and the purpose of protecting an oil layer is achieved; during production, the produced liquid pushes the valve ball open, the valve ball rolls to the inclined surface, and the produced liquid enters the annular space through the inclined side hole. The utility model discloses prevent the pollution of well-flushing liquid to the stratum, and do not influence the test of oil well working fluid level, be applicable to the sand outlet well.

Publication (bulletin) No.: CN2083627U, publication (public notice) day: 1991-08-28 hot washing packer is a downhole tool for packing oil layer in oil field rod-pumped well during hot washing. The packer comprises four large components of a telescopic short section, a centering component, a packing component and a fixed valve, wherein a space capable of moving up and down is sleeved on an upper sliding sleeve, so that the packer can stretch along with the expansion and contraction of a pipe column in the pumping process; the centralizing part enables the packer to be centered in the casing, the centralizing body and the central tube of the sliding valve can relatively slide up and down in the tripping pipe column, the central tube of the sliding valve slides up when the pumping pipe column is examined, four balance holes are all exposed, the pressure difference between the upper part and the lower part of the packing cup can be balanced, and the pipe column can be tripped out smoothly. The packer can prevent flushing fluid from flowing back to an oil layer when being used on a pumping unit well, and plays a role in protecting the oil layer.

Publication (bulletin) No.: CN210068069U, publication (public notice) day: 2020-02-14 discloses a leak-proof double-seal well-flushing packer, which comprises an upper outer pipe, a middle central pipe and a lower central pipe which are sequentially connected from top to bottom, wherein a leather cup sealing mechanism is sleeved outside the upper outer pipe, a hydraulic pushing mechanism is sleeved outside the middle central pipe, a rubber cylinder sealing mechanism and a slip anchoring mechanism are sleeved outside the lower central pipe, the rubber cylinder sealing mechanism comprises a sealing rubber cylinder, the slip anchoring mechanism comprises a slip, the hydraulic pushing mechanism can axially compress the sealing rubber cylinder, and the hydraulic pushing mechanism can also push the slip open. The anti-leakage double-seal well-flushing packer can realize sealing at normal temperature and high temperature without increasing the operation cost, greatly enhances the stratigraphy degree for oil deposit, promotes the yield of crude oil, and enables air to enter the stratum according to the design requirement instead of entering the stratum in a general manner.

Technical scheme and the technical problem that will solve and the beneficial effect who produces of above disclosure technique all with the utility model discloses inequality, perhaps technical field or application scenario are different, are directed to the utility model discloses more technical problem and the beneficial effect that will solve, above open technical document all do not have the technological inspiration.

Disclosure of Invention

An object of the utility model is to provide an oil reservoir hot washing double protection device to the above-mentioned defect that prior art exists for the construction is washed to the heat of oil well, prolongs effective hot washing number of times and shortens the drainage phase of hot washing back oil well.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hot washing double-protection device for an oil layer comprises a leather cup sealing anchoring device and a rubber cylinder sealing anchoring device, wherein the upper end of the rubber cylinder sealing anchoring device is connected with the lower end of the leather cup sealing anchoring device;

the packing element seals anchor includes:

the upper end of the lower central pipe is connected with an upper central pipe of the leather cup sealing anchoring device;

the rubber cylinder assembly is sleeved outside the lower central pipe;

the lower end of the connecting sleeve is connected with the rubber cylinder assembly;

the hydraulic unidirectional thrust mechanism is arranged in the connecting sleeve and is integrally positioned above the rubber cylinder assembly, and the hydraulic unidirectional thrust mechanism is provided with a pressure transfer hole communicated with the lower central tube.

Further, the hydraulic one-way thrust mechanism includes:

the positioning ring is connected with the outer wall of the lower end of the upper central tube in a thread-buckling manner, and the upper end of the connecting sleeve is connected with the positioning ring through a shear pin;

the lower end surface area of the deblocking piston is larger than the upper end surface area of the deblocking piston, the deblocking piston is connected with the positioning ring through a shear pin, the inner wall of the deblocking piston and the outer wall of the positioning ring are in sliding seal, and the outer wall of the deblocking piston and the inner wall of the connecting sleeve are in sliding seal;

the upper end of the valve body is connected with an upper central tube of the leather cup seal anchoring device, the lower end of the valve body is connected with a lower central tube, the inner wall of the valve body and the lower central tube are sealed, the outer wall of the lower half section of the valve body and the inner wall of the connecting sleeve are sealed, a piston cavity is formed between the upper half section of the valve body and the connecting sleeve, the unsealing piston is positioned in the piston cavity, and the valve body is positioned above the rubber cylinder assembly; the valve body is also provided with a radial pressure transfer hole which can enable the piston cavity to be communicated with the inner cavity of the lower central tube, and the valve body is also provided with an axial channel which can enable the piston cavity to be communicated with the rubber cylinder assembly;

a valve spool mounted within the axial passage.

Further, the packing element assembly includes:

the expandable rubber cylinder is sleeved on the lower central pipe;

the lower end of the upper rubber cylinder seat is connected with the upper end of the expanding rubber cylinder, and the upper end of the upper rubber cylinder seat is fixedly connected with the connecting sleeve;

the lower rubber cylinder base, the expanding rubber cylinder lower extreme is connected to lower rubber cylinder base upper end, and lower rubber cylinder base lower extreme is connected fixedly with the lower clutch, and the lower clutch upper end is connected fixedly with lower center tube lower extreme simultaneously.

Further, still include:

the steel ball, the steel ball is located on the necking down step that the lower clutch inner wall was seted up, and the steel ball diameter is greater than necking down step internal diameter promptly.

Further, still include:

the ball keeps off the ring, the ball keeps off the ring and fixes at the lower clutch upper end mouth inner wall, axial perforating hole is seted up to the ball fender ring, and axial perforating hole internal diameter is less than the steel ball diameter.

Further, the cup seal anchor assembly comprises:

the upper central pipe is provided with a flushing fluid inlet;

and the leather cup assembly is arranged on the outer wall of the upper central pipe, and the well washing liquid inlet is positioned above the leather cup assembly.

Further, the packing cup assembly includes:

the positioning pipe is sleeved on the outer wall of the upper central pipe in a threaded manner;

the upper leather cup is sleeved on the outer wall of the positioning pipe;

the upper leather bowl seat is sleeved on the outer wall of the upper central tube in a screw thread type manner, and the upper end of the upper leather bowl seat supports the lower end of the leather bowl;

the lower leather cup is sleeved on the outer wall of the upper leather cup seat;

the lower leather cup seat is sleeved on the outer wall of the upper central tube in a screw thread mode, and the upper end of the lower leather cup seat supports the lower end of the lower leather cup.

Further, the upper end of the upper central tube is connected with an upper joint.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses connect the oil-well pump lower part at oil well lifting column post. When the oil well is backflushed, the self-sealing property of the double-leather-cup sealing mechanism effectively prevents flushing fluid from entering a lower oil layer, the flushing fluid enters the center tube through a flushing fluid inlet of the upper center tube, due to the unidirectional closing action of the lower steel ball, the pressure inside the center tube is larger than the pressure in the annular space of the oil jacket at the lower part of the leather cup seal, the flushing fluid acts on the deblocking piston upwards through a pressure transfer hole of the center tube at the moment, the deblocking piston and a shear pin on the positioning ring are sheared, the deblocking piston moves upwards, the flushing fluid passes through the one-way valve core, the expansion type rubber cylinder is expanded, and double-flushing protection of the leather cup seal and the expansion type rubber cylinder is achieved. After the backwashing well is stopped, the valve core is closed upwards, the pressure of the flushing fluid is sealed, and the permanent setting of the expansion rubber cylinder is kept. When the oil well is normally produced, the steel ball can be freely opened under the pushing of the lower fluid. When the operation is performed, the pipe column is lifted, and because the expanded rubber cylinder is attached to the casing arm with larger friction force after expanding, the unsealing piston relatively moves downwards to open the valve core, the pressure in the expanded rubber cylinder is removed, the expanded rubber cylinder is retracted, and the whole device can be normally taken out.

Drawings

FIG. 1 is a schematic structural view of a double protection device for hot washing of an oil layer according to the present invention;

fig. 2 is a partially enlarged view of the position of the hydraulic thrust uni-directional mechanism of fig. 1.

In the figure: 1. the sealing device comprises an upper joint, 2, an upper central pipe, 3, a positioning pipe, 4, a leather cup, 5, an upper leather cup seat, 6, a lower leather cup seat, 7, a connecting sleeve, 8, a positioning ring, 9, a deblocking piston, 10, a valve body, 11, a valve core, 12, an upper rubber cylinder seat, 13, an expandable rubber cylinder, 14, a lower central pipe, 15, a lower rubber cylinder seat, 16, a steel ball, 17, a ball retaining ring, 18, a lower joint, 19, a first sealing ring, 20, a second sealing ring, 23, a third sealing ring and 24, a fourth sealing ring;

25. flushing fluid inlet, 26, pressure transfer hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1 to 2, the present invention provides a technical solution:

a hot washing double-protection device for an oil layer comprises a leather cup sealing anchoring device and a rubber cylinder sealing anchoring device, wherein the upper end of the rubber cylinder sealing anchoring device is connected with the lower end of the leather cup sealing anchoring device;

the packing element seals anchor includes:

the upper end of the lower central pipe 14 is connected with the upper central pipe 2 of the leather cup seal anchoring device;

the rubber cylinder assembly is sleeved outside the lower central pipe;

the lower end of the connecting sleeve is connected with a rubber cylinder assembly;

the hydraulic unidirectional thrust mechanism is arranged in the connecting sleeve and is integrally positioned above the rubber cylinder assembly, and the hydraulic unidirectional thrust mechanism is provided with a pressure transfer hole 26 communicated with the lower central pipe.

Further, the hydraulic one-way thrust mechanism includes:

the positioning ring 8 is connected to the outer wall of the lower end of the upper central tube in a thread-buckling mode, and the upper end of the connecting sleeve is connected with the positioning ring through a shear pin;

the deblocking piston 9 is connected with the positioning ring through a shear pin, the inner wall of the deblocking piston and the outer wall of the positioning ring are in sliding seal, and the outer wall of the deblocking piston and the inner wall of the connecting sleeve are in sliding seal;

the upper end of the valve body is connected with an upper central tube of the leather cup seal anchoring device, the lower end of the valve body is connected with a lower central tube, the inner wall of the valve body and the lower central tube are sealed, the outer wall of the lower half section of the valve body and the inner wall of the connecting sleeve are sealed, a piston cavity is formed between the upper half section of the valve body and the connecting sleeve, the unsealing piston is positioned in the piston cavity, and the valve body is positioned above the rubber cylinder assembly; the valve body is also provided with a radial pressure transfer hole 26 which can enable the piston cavity to be communicated with the inner cavity of the lower central tube, and the valve body is also provided with an axial channel which can enable the piston cavity to be communicated with the rubber cylinder assembly;

the valve core 11, which is installed in the axial channel, forms a one-way channel mechanism only from top to bottom, and the technology of installing a one-way flow mechanism in the channel belongs to the known technology, and is similar to a one-way valve structure, and is clear to a person skilled in the art.

Further, the packing element assembly includes:

the expansion rubber sleeve 13 is sleeved on the lower central pipe;

the lower end of the upper rubber cylinder seat is connected with the upper end of the expanding rubber cylinder, and the upper end of the upper rubber cylinder seat is fixedly connected with the connecting sleeve;

lower cylinder base 15, expanding cylinder lower extreme is connected to lower cylinder base upper end, and lower cylinder base lower extreme is connected fixedly with lower clutch 18, and the lower clutch upper end is connected fixedly with lower center tube lower extreme simultaneously.

Further, still include:

and the steel ball 16 is located on a necking step formed in the inner wall of the lower connector, namely the diameter of the steel ball is larger than the inner diameter of the necking step.

Further, still include:

and the ball retaining ring 17 is fixed on the inner wall of the upper port of the lower connector, an axial through hole is formed in the ball retaining ring, and the inner diameter of the axial through hole is smaller than the diameter of the steel ball.

Further, the cup seal anchor assembly comprises:

an upper central pipe 2 provided with a flushing fluid inlet 25;

and the leather cup assembly is arranged on the outer wall of the upper central pipe, and the well washing liquid inlet is positioned above the leather cup assembly.

Further, the packing cup assembly includes:

the positioning tube 3 is sleeved on the outer wall of the upper central tube in a threaded manner;

the upper leather cup is sleeved on the outer wall of the positioning pipe;

the upper leather bowl seat 5 is sleeved on the outer wall of the upper central tube in a screw thread type manner, and the upper end of the upper leather bowl seat supports the lower end of the leather bowl;

the lower leather cup is sleeved on the outer wall of the upper leather cup seat;

the lower leather cup seat 6 is sleeved on the outer wall of the upper central tube in a screw thread mode, and the upper end of the lower leather cup seat supports the lower end of the lower leather cup.

Further, the upper end of the upper central tube is connected with an upper joint 1.

Fig. 1 is a schematic structural diagram of an oil layer hot washing double protection device. The automatic sealing device comprises an upper joint 1, an upper central pipe 2, a positioning pipe 3, a leather cup 4, an upper leather cup seat 5, a lower leather cup seat 6, a connecting sleeve 7, a positioning ring 8, a deblocking piston 9, a valve body 10, a valve core 11, an upper rubber cylinder seat 12, an expansion rubber cylinder 13, a lower central pipe 14, a lower rubber cylinder seat 15, a steel ball 16, a ball retaining ring 17 and a lower joint 18 which are connected in sequence. The upper joint 1 is in threaded connection with the upper central tube 2, the leather cup 4 is fixed with the upper leather cup seat 5 and the lower leather cup seat 6 through the positioning tube 3, the leather cup seat 6 is connected with the upper central tube 2 through threads, the positioning ring 8 is in threaded connection with the upper central tube 2, the lower portion of the connecting sleeve 7 is in threaded connection with the upper rubber cup seat 12, the deblocking piston 9 is located between the connecting sleeve 7 and the upper central tube 2 and is fixed with the positioning ring 8 through shear pins, the lower portion of the deblocking piston 9 is a valve body 10, a valve core 11 is arranged in the valve body, the lower rubber cup seat 15 is connected with the lower joint 18 through threads, the expanding rubber cup 13 is fixed on the lower central tube 14 through the upper rubber cup seat 12 and the lower rubber cup seat 15, the upper central tube 2 is in threaded connection with the lower central tube 14 through threads, a steel ball 16 is.

The flushing liquid inlet 25 is arranged on the upper part of the upper central pipe 2 and below the upper joint 1 of the upper leather cup 4, the flushing liquid inlet 25 is designed to be a rectangular slotted hole in order to ensure the flow area, and two ends of the flushing liquid inlet 25 are semicircular in order to facilitate processing.

The pressure transmitting hole 26 is arranged on the valve body 10, and the pressure is transmitted to the lower end of the unsealing piston 9 through the hole, so that the connecting pin of the positioning ring 8 and the unsealing piston 9 is sheared, and the pressure is transmitted into the rubber cylinder 13 through the hole of the valve core 11 arranged on the valve body 10. The pressure in the rubber cylinder 13 can also be relieved.

The upper central tube 2, the valve body 10 and the lower central tube 14 are connected in sequence, the pressure transfer hole 26 is formed in the valve body 10, and the pressure transfer hole 26 is located between the upper central tube 2 and the lower central tube 14.

The utility model discloses connect the oil-well pump lower part at oil well lifting column post. When the oil well is backflushed, the self-sealing performance of the double-cup seal 4 mechanism effectively prevents flushing liquid from entering a lower oil layer, the flushing liquid enters the central tube through a flushing liquid inlet of the upper central tube 2, due to the unidirectional closing action of the lower steel ball 13, the pressure inside the central tube is larger than the pressure of an oil sleeve annular space at the lower part of the cup seal, the flushing liquid acts on the deblocking piston 9 upwards through a pressure transmission hole of the central tube at the moment, the deblocking piston and a shear pin on the positioning ring 8 are cut off, the deblocking piston moves upwards, the flushing liquid passes through the one-way valve core 11, the expansion type rubber cylinder 13 is expanded, and double-flushing protection of the cup seal and the expansion type rubber cylinder is achieved. After the backwashing well is stopped, the valve core 11 is closed upwards, the pressure of the flushing fluid is sealed, and the permanent setting of the expansion rubber cylinder 13 is kept. When the oil well is normally produced, the steel ball 16 can be freely opened under the pushing of the lower fluid. When the operation is performed, the pipe column is lifted, and because the expansion rubber cylinder 13 is attached to the casing arm with larger friction force after expanding, the unsealing piston 9 relatively moves downwards to open the valve core 11, the pressure in the expansion rubber cylinder 13 is removed, the expansion rubber cylinder 13 is retracted, and the whole device can be normally taken out.

Example 2:

referring to fig. 1 to 2, the present invention provides a technical solution:

a hot washing double-protection device for an oil layer comprises a leather cup sealing anchoring device and a rubber cylinder sealing anchoring device, wherein the upper end of the rubber cylinder sealing anchoring device is connected with the lower end of the leather cup sealing anchoring device;

the packing element seals anchor includes:

the upper end of the lower central pipe 14 is connected with the upper central pipe 2 of the leather cup seal anchoring device;

the rubber cylinder assembly is sleeved outside the lower central pipe;

the lower end of the connecting sleeve is connected with a rubber cylinder assembly;

the hydraulic unidirectional thrust mechanism is arranged in the connecting sleeve and is integrally positioned above the rubber cylinder assembly, and the hydraulic unidirectional thrust mechanism is provided with a pressure transfer hole 26 communicated with the lower central pipe.

Further, the hydraulic one-way thrust mechanism includes:

the positioning ring 8 is connected to the outer wall of the lower end of the upper central tube in a thread-buckling mode, and the upper end of the connecting sleeve is connected with the positioning ring through a shear pin;

the deblocking piston 9 is connected with the positioning ring through a shear pin, the inner wall of the deblocking piston and the outer wall of the positioning ring are in sliding seal, and the outer wall of the deblocking piston and the inner wall of the connecting sleeve are in sliding seal;

the upper end of the valve body is connected with an upper central tube of the leather cup seal anchoring device, the lower end of the valve body is connected with a lower central tube, the inner wall of the valve body and the lower central tube are sealed, the outer wall of the lower half section of the valve body and the inner wall of the connecting sleeve are sealed, a piston cavity is formed between the upper half section of the valve body and the connecting sleeve, the unsealing piston is positioned in the piston cavity, and the valve body is positioned above the rubber cylinder assembly; the valve body is also provided with a radial pressure transfer hole which can enable the piston cavity to be communicated with the inner cavity of the lower central tube, and the valve body is also provided with an axial channel which can enable the piston cavity to be communicated with the rubber cylinder assembly;

a valve spool 11 mounted in the axial passage.

Further, the packing element assembly includes:

the expansion rubber sleeve 13 is sleeved on the lower central pipe;

the lower end of the upper rubber cylinder seat is connected with the upper end of the expanding rubber cylinder, and the upper end of the upper rubber cylinder seat is fixedly connected with the connecting sleeve;

lower cylinder base 15, expanding cylinder lower extreme is connected to lower cylinder base upper end, and lower cylinder base lower extreme is connected fixedly with lower clutch 18, and the lower clutch upper end is connected fixedly with lower center tube lower extreme simultaneously.

Further, still include:

and the steel ball 16 is located on a necking step formed in the inner wall of the lower connector, namely the diameter of the steel ball is larger than the inner diameter of the necking step.

Further, still include:

and the ball retaining ring 17 is fixed on the inner wall of the upper port of the lower connector, an axial through hole is formed in the ball retaining ring, and the inner diameter of the axial through hole is smaller than the diameter of the steel ball.

Example 3:

referring to fig. 1 to 2, the present invention provides a technical solution:

a hot washing double-protection device for an oil layer comprises a leather cup sealing anchoring device and a rubber cylinder sealing anchoring device, wherein the upper end of the rubber cylinder sealing anchoring device is connected with the lower end of the leather cup sealing anchoring device;

the packing element seals anchor includes:

the upper end of the lower central pipe 14 is connected with the upper central pipe 2 of the leather cup seal anchoring device;

the rubber cylinder assembly is sleeved outside the lower central pipe;

the lower end of the connecting sleeve is connected with a rubber cylinder assembly;

the hydraulic unidirectional thrust mechanism is arranged in the connecting sleeve and is integrally positioned above the rubber cylinder assembly, and the hydraulic unidirectional thrust mechanism is provided with a pressure transfer hole 26 communicated with the lower central pipe.

Further, the hydraulic one-way thrust mechanism includes:

the positioning ring 8 is connected to the outer wall of the lower end of the upper central tube in a thread-buckling mode, and the upper end of the connecting sleeve is connected with the positioning ring through a shear pin;

the deblocking piston 9 is connected with the positioning ring through a shear pin, the inner wall of the deblocking piston and the outer wall of the positioning ring are in sliding seal, and the outer wall of the deblocking piston and the inner wall of the connecting sleeve are in sliding seal;

the upper end of the valve body is connected with an upper central tube of the leather cup seal anchoring device, the lower end of the valve body is connected with a lower central tube, the inner wall of the valve body and the lower central tube are sealed, the outer wall of the lower half section of the valve body and the inner wall of the connecting sleeve are sealed, a piston cavity is formed between the upper half section of the valve body and the connecting sleeve, the unsealing piston is positioned in the piston cavity, and the valve body is positioned above the rubber cylinder assembly; the valve body is also provided with a radial pressure transfer hole which can enable the piston cavity to be communicated with the inner cavity of the lower central tube, and the valve body is also provided with an axial channel which can enable the piston cavity to be communicated with the rubber cylinder assembly;

a valve spool 11 mounted in the axial passage.

Further, still include:

and the steel ball 16 is located on a necking step formed in the inner wall of the lower connector, namely the diameter of the steel ball is larger than the inner diameter of the necking step.

Although fig. 1 is used for all the above embodiments, it is obvious to those skilled in the art that a separate drawing is not shown as long as the parts or structural features missing in the embodiments are removed from the drawing. As will be clear to the skilled person. Of course, the embodiments with more components are only the preferred embodiments, and the embodiments with fewer components are the basic embodiments, but the basic utility model objects can also be achieved, so all these are within the protection scope of the present invention.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A hot washing double-protection device for an oil layer comprises a leather cup sealing anchoring device and a rubber cylinder sealing anchoring device, wherein the upper end of the rubber cylinder sealing anchoring device is connected with the lower end of the leather cup sealing anchoring device;

it is characterized in that the rubber cylinder sealing and anchoring device comprises:

the upper end of the lower central pipe is connected with an upper central pipe of the leather cup sealing anchoring device;

the rubber cylinder assembly is sleeved outside the lower central pipe;

the lower end of the connecting sleeve is connected with the rubber cylinder assembly;

the hydraulic unidirectional thrust mechanism is arranged in the connecting sleeve and is integrally positioned above the rubber cylinder assembly, and the hydraulic unidirectional thrust mechanism is provided with a pressure transfer hole communicated with the lower central tube.

2. The double protection device for hot washing of oil layer according to claim 1, wherein the hydraulic one-way thrust mechanism comprises:

the positioning ring is connected with the outer wall of the lower end of the upper central tube in a thread-buckling manner, and the upper end of the connecting sleeve is connected with the positioning ring through a shear pin;

the lower end surface area of the deblocking piston is larger than the upper end surface area of the deblocking piston, the deblocking piston is connected with the positioning ring through a shear pin, the inner wall of the deblocking piston and the outer wall of the positioning ring are in sliding seal, and the outer wall of the deblocking piston and the inner wall of the connecting sleeve are in sliding seal;

the upper end of the valve body is connected with an upper central tube of the leather cup seal anchoring device, the lower end of the valve body is connected with a lower central tube, the inner wall of the valve body and the lower central tube are sealed, the outer wall of the lower half section of the valve body and the inner wall of the connecting sleeve are sealed, a piston cavity is formed between the upper half section of the valve body and the connecting sleeve, the unsealing piston is positioned in the piston cavity, and the valve body is positioned above the rubber cylinder assembly; the valve body is also provided with a radial pressure transfer hole which can enable the piston cavity to be communicated with the inner cavity of the lower central tube, and the valve body is also provided with an axial channel which can enable the piston cavity to be communicated with the rubber cylinder assembly;

a valve spool mounted within the axial passage.

3. A hot-wash dual protection device for oil layer according to claim 1 or 2, wherein said rubber cartridge assembly comprises:

the expandable rubber cylinder is sleeved on the lower central pipe;

the lower end of the upper rubber cylinder seat is connected with the upper end of the expanding rubber cylinder, and the upper end of the upper rubber cylinder seat is fixedly connected with the connecting sleeve;

the lower rubber cylinder base, the expanding rubber cylinder lower extreme is connected to lower rubber cylinder base upper end, and lower rubber cylinder base lower extreme is connected fixedly with the lower clutch, and the lower clutch upper end is connected fixedly with lower center tube lower extreme simultaneously.

4. The double protection device for hot washing of the oil layer according to claim 3, further comprising steel balls and ball retaining rings;

the steel ball is located on a necking step formed in the inner wall of the lower connector, namely the diameter of the steel ball is larger than the inner diameter of the necking step;

the ball retaining ring is fixed on the inner wall of the upper port of the lower connector, an axial through hole is formed in the ball retaining ring, and the inner diameter of the axial through hole is smaller than the diameter of the steel ball.

5. A hot-wash dual protection device for oil reservoir according to claim 1 or 2, wherein the cup seal anchor device comprises:

the upper central pipe is provided with a flushing fluid inlet;

and the leather cup assembly is arranged on the outer wall of the upper central pipe, and the well washing liquid inlet is positioned above the leather cup assembly.

6. The dual hot-wash reservoir protection device as claimed in claim 5, wherein the cup assembly comprises:

the positioning pipe is sleeved on the outer wall of the upper central pipe in a threaded manner;

the upper leather cup is sleeved on the outer wall of the positioning pipe;

the upper leather bowl seat is sleeved on the outer wall of the upper central tube in a screw thread type manner, and the upper end of the upper leather bowl seat supports the lower end of the leather bowl;

the lower leather cup is sleeved on the outer wall of the upper leather cup seat;

the lower leather cup seat is sleeved on the outer wall of the upper central tube in a screw thread mode, and the upper end of the lower leather cup seat supports the lower end of the lower leather cup.

7. A dual hot-wash protection device for oil reservoir according to claim 1 or 2, wherein the upper central tube is connected with an upper joint at its upper end.

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