CN210460582U - High temperature resistant high pressure resistant packer - Google Patents

Abstract

The utility model provides a high temperature resistant high pressure resistant packer, including the top connection, the expansion cylinder, the seal ring cover, the center tube, compression piston and lower clutch, pack asbestos filler between expansion cylinder tip and the top connection, expansion cylinder middle part is protruding to the outside, the protruding position outside of expansion cylinder sets up the mounting groove of seal ring cover, the seal ring cover passes through the mounting groove of the seal ring cover of the mode fixed connection expansion cylinder that the hot melt was inlayed, compression piston is close to expansion cylinder one end and is provided with the mounting groove of expansion cylinder, the center tube outside that expansion cylinder one end was kept away from to the compression piston sets up the recess, space packing quartz sand filler between the protruding position of expansion cylinder and the center tube, the center tube is close to lower extreme screw thread setting and passes the pressure hole, compression piston and center tube contact surface set up metal seal ring, lower clutch is close to compression piston one end and is set, The expansion cylinder, the compression piston and the lower joint are externally sleeved with a sleeve. The beneficial effects of the utility model are that guarantee the stability under the high temperature high pressure.

Description

High temperature resistant high pressure resistant packer

Technical Field

The utility model belongs to the packer field especially relates to a high temperature resistant high pressure resistant packer.

Background

Present oil gas well exploitation degree of depth is constantly deepening, along with the increase of degree of depth, stratum temperature also increases along with it, present well depth exceeds 5-6 kilometers 'oil gas well, well temperature can reach more than 200 ℃, but the well packer that uses now, adopt rubber materials to make sealing element most and seal the pit shaft, under the effect of high temperature, rubber materials's physical property decay is serious, can take place compressive strength and reduce, the phenomenon of fracture, carbonization, hardly satisfy the working requirement in the exploitation work.

Meanwhile, the density of the stratum lithology is gradually increased along with the increase of the depth of the well, and when the fracturing operation is carried out on an oil well, the rubber sealing element which passes through high temperature and has attenuated properties cannot be lower than the requirement of high-pressure operation, so that the rubber sealing element can be damaged in the operation process, and the fracturing operation fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a packer that high temperature resistant, high pressure are suitable for especially is fit for high temperature high pressure operation in the pit.

The technical scheme of the utility model is that: a high-temperature-resistant and high-pressure-resistant packer comprises an upper joint, an expansion cylinder, a sealing ring sleeve, a central pipe, a compression piston, a lower joint and a sleeve, wherein the upper joint is a hollow pipe fitting, a step is arranged on the outer side of the upper end of the upper joint, a step is arranged inside the lower end of the upper joint, a second-stage step inside the upper joint is connected with the central pipe through a thread, the expansion cylinder is inserted between the central pipe and a first-stage step inside the upper joint, asbestos filler is arranged between the end part of the expansion cylinder and the upper joint, the middle part of the expansion cylinder protrudes outwards, a mounting groove of the sealing ring sleeve is arranged on the outer side of the protruding part of the expansion cylinder, the sealing ring sleeve is connected with the mounting groove of the sealing ring sleeve in a hot melting embedding mode, the compression piston is inserted at one end, far, the compression piston is kept away from expansion cylinder one end and is located the center tube outside and sets up the recess, the space sets up quartz sand filler between expansion cylinder protruding position and the center tube, the center tube lower extreme passes through the threaded connection lower clutch, lower clutch outside both ends all set up the ladder, and center tube one end internal diameter is kept away from to the lower clutch is less than the center tube internal diameter, the center tube is close to the lower extreme screw thread and sets up the biography pressure hole, the lower clutch is located to pass and presses the hole outside and set up the annular groove, the annular groove intercommunication compression piston of lower clutch, compression piston and center tube contact surface set up metal seal, the nearly compression piston one end of lower clutch sets up metal seal with compression piston contact surface, the sleeve pipe is established to top connection, expansion cylinder, compression piston and the outside cover of lower clutch, top connection, expansion cylinder, compression piston and lower.

Furthermore, the expansion cylinder is made of copper materials.

Furthermore, the sealing ring sleeve is made of lead or high-temperature resistant resin materials.

Furthermore, the quartz sand filler is filled with smooth quartz sand.

Furthermore, sidelines of the upper joint, the expansion cylinder, the compression piston and the lower joint are all set to be round angles.

The utility model has the advantages and positive effects that:

1. due to the adoption of the sealing element made of copper, lead or high-temperature-resistant resin, the sealing element can normally work in a high-temperature and high-pressure environment, the condition that the work cannot be finished due to the fact that the physical properties of a common sealing material are reduced in the high-temperature and high-pressure environment is avoided, and the working effect is improved.

2. Because the packing of asbestos and quartz sand is adopted, certain buffering is provided through the packing, rigid collision among all parts can be avoided, the safety of the parts is protected, meanwhile, certain elastic buffering is provided in the sealing process, and the influence of instant stress on the service life of the parts is avoided.

3. Because the bottom inner diameter of the lower joint is smaller than the inner diameter of the central pipe, pressure is continuously provided through the pressure transfer hole by the throttling expansion principle, and the sealing effect of the packer is ensured.

4. Because each sideline is set as a circular bead, the abrasion and scratch of parts are reduced in the sleeve, and meanwhile, the assembly of each part is convenient.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a sectional view of the working state of the present invention.

In the figure:

1. upper joint 2, asbestos filler 3, expansion cylinder

4. Sealing ring sleeve 5, quartz sand filler 6 and central tube

7. Metal sealing ring 8, compression piston 9, pressure transmission hole

10. Lower joint 11 and sleeve

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-2:

a high temperature and high pressure resistant packer comprises an upper joint 1, an expansion cylinder 3, a sealing ring sleeve 4, a central pipe 6, a compression piston 8, a lower joint 10 and a sleeve 11, wherein the upper joint 1 is a hollow pipe, a ladder is arranged at the outer side of the upper end part of the upper joint 1, a ladder is arranged inside the lower end part of the upper joint 1, a second-stage ladder inside the upper joint 1 is in threaded connection with the central pipe 6, the expansion cylinder 3 is inserted between the central pipe 6 and a first-stage ladder inside the upper joint 1, asbestos packing 2 is arranged between the end part of the expansion cylinder 3 and the upper joint 1, the middle part of the expansion cylinder 3 protrudes outwards, a mounting groove of the sealing ring sleeve is arranged outside the protruding part of the expansion cylinder 3, the sealing ring sleeve 4 is connected with the mounting groove of the sealing ring sleeve in a hot melting embedding manner, the expansion cylinder 3 is far away from the compression piston 8, the compression piston 8 is close to the mounting groove that 3 one end of expansion cylinder was provided with expansion cylinder 3, and the compression piston 8 is kept away from 3 one ends of expansion cylinder and is located the center tube 6 outside and set up the recess, the space sets up quartz sand filler 5 between 3 protruding positions of expansion cylinder and the center tube 6, the center tube 6 lower extreme passes through threaded connection lower clutch 10, lower clutch 10 outside both ends all set up the ladder, and 6 one end internal diameters of center tube are less than the center tube 6 internal diameter are kept away from to lower clutch 10, the center tube 6 is close to the lower extreme screw thread and sets up pressure transmission hole 9, lower clutch 10 is located the pressure transmission hole 9 outside and sets up the annular groove, the annular groove intercommunication compression piston 8 of lower clutch 10, compression piston 8 and center tube 6 contact surface set up metal seal 7, lower clutch 10 is close to compression piston 8 one end and compression piston 8 contact surface and sets, The expansion cylinder 3, the compression piston 8 and the lower joint 10 are externally sleeved with a sleeve 11, and the outer diameters of the upper joint 1, the expansion cylinder 3, the compression piston 8 and the lower joint 10 are all smaller than the sleeve 11.

The expansion cylinder 3 is made of copper materials.

The sealing ring sleeve 4 is made of lead or high-temperature resistant resin material.

The quartz sand filler 5 is filled with smooth quartz sand.

And side lines of the upper joint 1, the expansion cylinder 3, the compression piston 8 and the lower joint 10 are all set to be round angles.

The working process of the example is as follows: in the using process, firstly, a pressurizing sliding sleeve is arranged in an inner cavity of a lower joint 10, then a packer is arranged in a sleeve 11, after the packer reaches a specified sealing position, liquid is injected into a central tube 6 in a pressurizing mode, because the internal pressure of the central tube 6 rises, oil transmits the pressure to a compression piston 8 through a pressure transmission hole 9, after the compression piston 8 receives the pressure, the compression piston 8 moves upwards along with the central tube 6, the compression piston 8 extrudes an expansion cylinder 3, quartz sand fillers 5 in the expansion cylinder 3 move along with the external pressure, the pressure and the quartz sand fillers 5 force a weaker middle bulge of the expansion cylinder 3 to bulge outwards, the fillers also prevent rigid collision between parts, a pressure buffer is provided, after a sealing sleeve ring 4 on the outer side of the bulge of the expansion cylinder 3 contacts the sleeve 11, the sealing condition of the packer is achieved, sealing is completed, and the quartz sand fillers 5 are matched with a sealing ring sleeve 4, the buffer is provided while sealing, and the pressure of the compression piston 8 is uniformly distributed in the expansion cylinder 3, so that good stress and good separation effect are ensured.

The central tube 6 is continuously pressurized, the pressure exceeds the limit of the pressurizing sliding sleeve, the pressurizing sliding sleeve is separated from the inner cavity of the lower joint 10, a channel between the oil tube and the sleeve 11 is established, the inner diameter of the bottom of the lower joint 10 is smaller than the inner diameter of the central tube 6, the pressure on the compression piston 8 is kept through the throttling expansion principle, the sealing pressure between the sealing sleeve ring 4 and the sleeve 11 is kept, the sealing performance is stabilized, each sealing element adopts copper, lead or high-temperature-resistant resin, the stability of the working state under high temperature and high pressure is ensured, the physical performance cannot be reduced when the underground high-temperature condition works, the sealing failure is caused, meanwhile, certain elasticity is ensured, the central tube 6 cannot be damaged due to high pressure when the inside of the central tube is pressurized, and good working capacity under high temperature and high pressure.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (5)

1. The utility model provides a high temperature resistant high pressure resistant packer, includes top connection (1), inflation section of thick bamboo (3), seal ring cover (4), center tube (6), compression piston (8), lower clutch (10) and sleeve pipe (11), its characterized in that: the upper joint (1) is a hollow pipe fitting, the outer side of the upper end part of the upper joint (1) is provided with a step, the inner part of the lower end part of the upper joint (1) is provided with a step, a second-stage step in the upper joint (1) is connected with a central pipe (6) through a thread, an expansion cylinder (3) is inserted between the central pipe (6) and a first-stage step in the upper joint (1), asbestos filler (2) is arranged between the end part of the expansion cylinder (3) and the upper joint (1), the middle part of the expansion cylinder (3) protrudes outwards, the outer side of the protruding part of the expansion cylinder (3) is provided with a mounting groove of a sealing ring sleeve (4), the sealing ring sleeve (4) is connected with the mounting groove of the sealing ring sleeve (4) in a hot melting embedding manner, one end of the expansion cylinder (3) far away from the upper joint is inserted with a compression piston (8), the compression piston (8) is sleeved on the outer side of the, one end of a compression piston (8) far away from an expansion cylinder (3) is positioned outside a central pipe (6) and is provided with a groove, a gap between the raised part of the expansion cylinder (3) and the central pipe (6) is provided with quartz sand filler (5), the lower end of the central pipe (6) is connected with a lower joint (10) through threads, two ends of the outer side of the lower joint (10) are respectively provided with a ladder, the inner diameter of one end of the lower joint (10) far away from the central pipe (6) is smaller than that of the central pipe (6), the central pipe (6) is close to lower end threads and is provided with a pressure transfer hole (9), the outer side of the pressure transfer hole (9) of the lower joint (10) is provided with an annular groove, the annular groove of the lower joint (10) is communicated with the compression piston (8), the contact surfaces of the compression piston (8) and the central pipe (6) are provided with metal sealing rings (7), one end of, the outer parts of the upper joint (1), the expansion cylinder (3), the compression piston (8) and the lower joint (10) are sleeved with the sleeve (11), and the outer diameters of the upper joint (1), the expansion cylinder (3), the compression piston (8) and the lower joint (10) are all smaller than the sleeve (11).

2. The packer of claim 1, wherein the packer is one of a high temperature and high pressure resistant packer: the expansion cylinder (3) is made of copper materials.

3. The packer of claim 1, wherein the packer is one of a high temperature and high pressure resistant packer: the sealing ring sleeve (4) is made of lead or high-temperature-resistant resin materials.

4. The packer of claim 1, wherein the packer is one of a high temperature and high pressure resistant packer: the quartz sand filler (5) is filled with smooth quartz sand.

5. The packer of claim 1, wherein the packer is one of a high temperature and high pressure resistant packer: the sidelines of the upper joint (1), the expansion cylinder (3), the compression piston (8) and the lower joint (10) are all set to be round angles.

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