CN210509105U

CN210509105U - Metal sealing packer

Info

Publication number: CN210509105U
Application number: CN201921481957.7U
Authority: CN
Inventors: 张胜鹏; 宋朝晖; 乔东宇; 谢天涯; 王庆国; 张昕; 李富强; 王飞跃
Original assignee: China National Petroleum Corp; CNPC Xibu Drilling Engineering Co Ltd
Current assignee: China National Petroleum Corp; CNPC Xibu Drilling Engineering Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-12
Anticipated expiration: 2029-09-06

Abstract

The utility model relates to a packer technical field in the pit, a metal seal packer, its dabber, the lower clutch, go up the slips, go up the cone, the metal seal section of thick bamboo, support the cover, the lower cone, slips and adapter sleeve down, the dabber lower extreme outside is in the same place with the inboard fixed mounting in lower clutch upper end, the dabber upper portion outside is equipped with the spacing ring platform, the lower clutch upper portion outside is equipped with the adapter sleeve that the upper end is located the dabber lower part outside, adapter sleeve upper end inboard is equipped with the seal ring platform, be equipped with the suppress pressure chamber between seal ring platform lower extreme and the lower clutch upper end, the dabber outside that corresponds suppress pressure chamber position is equipped with inside and outside suppress the pressure hole. The utility model has the advantages of reasonable and compact structure, convenient to use replaces packing element packer through setting up the metal seal section of thick bamboo, avoids under the highly compressed environment of high temperature, packing element stress relaxation causes the packer to lose the leakproofness, has high temperature resistant, high pressure resistant and sealed effectual characteristics.

Description

Metal sealing packer

Technical Field

The utility model relates to a packer technical field in the pit is a metal seal packer.

Background

With the continuous deep exploration of oil fields, the search of oil and gas resources from shallow layers to deep layers is an important material basis for the continuous high yield of the oil fields. The complexity of deep reservoir lithology imposes higher requirements on the oil recovery process. The packer is used as a main tool for layered oil production and is widely applied to oil production engineering. Along with the deepening of a development well, the temperature is higher and higher (more than 150 ℃), the traditional packer sealing rubber tube is made of rubber, and the traditional packer sealing rubber tube is easy to age under the conditions of high temperature and high pressure, so that the phenomena of stress relaxation and the like of a sealing rubber tube element are caused, the packer is lost in the underground, and the service performance and the service life of the packer are seriously influenced.

Disclosure of Invention

The utility model provides a metal seal packer has overcome above-mentioned prior art not enough, and it can effectively solve the problem that current rubber packing element packer can't realize the highly compressed operation demand of high temperature.

The technical scheme of the utility model is realized through following measure: a metal sealing packer comprises a mandrel, a lower joint, an upper slip, an upper cone, a metal sealing cylinder, a support sleeve, a lower cone, a lower slip and a connecting sleeve, wherein the outer side of the lower end of the mandrel is fixedly installed with the inner side of the upper end of the lower joint; the upper slips, the upper cone, the metal sealing cylinder, the supporting sleeve, the lower cone and the lower slips are sequentially sleeved on the outer side of the mandrel corresponding to the position between the limiting ring table and the connecting sleeve from top to bottom, the upper end of the upper slips is abutted against the lower end of the limiting ring table, the inner side of the lower part of the upper slips can be radially outwardly expanded when being subjected to outward extrusion force, the upper cone comprises an upper cone section and an upper connecting section which are fixedly installed together from top to bottom, the upper cone section is in a circular truncated cone shape with a small upper part and a large lower part, the upper end of the upper cone section is positioned on the inner side of the lower end of the upper slips, the lower end of the upper connecting section is fixedly installed together with the upper end of the metal sealing cylinder; the lower end of the lower slip abuts against the upper end of the connecting sleeve, the inner side of the upper part of the lower slip can be radially expanded outwards when being subjected to outward extrusion force, the lower cone body comprises a lower connecting section and a lower cone section which are fixedly arranged from top to bottom, the lower cone section is in a circular truncated cone shape with a large upper part and a small lower part, the lower end of the lower cone section is positioned on the inner side of the upper end of the lower slip, and the upper end of the lower connecting section is fixedly arranged with the lower end of the supporting sleeve; slip teeth are arranged on the outer sides of the upper slip and the lower slip; the supporting sleeve comprises a middle conical section and a middle connecting section which are fixedly installed together from top to bottom, the middle conical section is in a circular truncated cone shape with a small upper part and a big lower part, and the upper part of the middle conical section is positioned on the inner side of the lower part of the metal sealing cylinder; the lower connecting section and the mandrel are fixedly installed together through a second shear pin, and the upper connecting section and the mandrel are fixedly installed together through a third shear pin.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the retaining device can comprise a locking ring, inner retaining teeth, outer retaining teeth and an anti-rotation pin, wherein the locking ring is fixedly arranged on the inner side of the middle part of the connecting sleeve, at least one group of inner retaining teeth are continuously arranged on the inner side of the locking ring from top to bottom, the inner retaining teeth are ring platforms with straight triangular sections, the ring platforms are narrow at the top and wide at the bottom, the outer retaining teeth matched with the inner retaining teeth are arranged on the outer side of the upper part of the lower joint corresponding to the locking ring, the outer retaining teeth are ring platforms with right-angled triangular sections, and the ring platforms are wide at the top and narrow at the bottom; the lock ring is provided with an anti-rotation opening which is communicated up and down, the outer side of the connecting sleeve corresponding to the position of the anti-rotation opening is provided with at least one anti-rotation pin, and the inner end of each anti-rotation pin is positioned in the anti-rotation opening.

The metal sealing cylinder can be made of brass metal material.

The sealing device also comprises O-shaped sealing rings, wherein at least one O-shaped sealing ring is distributed between the inner side of the lower part of the supporting sleeve and the outer side of the mandrel at intervals up and down, at least one O-shaped sealing ring is distributed between the inner side of the sealing ring table and the outer side of the mandrel at intervals up and down, and at least one O-shaped sealing ring is distributed between the outer side of the upper end of the lower joint and the inner side of the upper part of.

The outer side of the lower end of the mandrel can be fixedly installed together with the inner side of the upper end of the lower connector through threads, the lower end of the upper connecting section is fixedly installed together with the upper end of the metal sealing cylinder through threads, and the upper end of the lower connecting section is fixedly installed together with the lower end of the supporting sleeve through threads.

The utility model has the advantages of reasonable and compact structure, convenient to use replaces packing element packer through setting up the metal seal section of thick bamboo, avoids under the highly compressed environment of high temperature, packing element stress relaxation causes the packer to lose the leakproofness, has high temperature resistant, high pressure resistant and sealed effectual characteristics.

Drawings

Fig. 1 is a schematic structural view of the preferred embodiment of the present invention.

Fig. 2 is a partially enlarged schematic view at a in fig. 1.

The codes in the figures are respectively: the anti-rotation clamping device comprises a mandrel 1, a limiting ring table 2, an upper slip 3, an upper conical section 4, an upper connecting section 5, a metal sealing cylinder 6, a middle conical section 7, a middle connecting section 8, a lower connecting section 9, a lower conical section 10, a lower slip 11, a connecting sleeve 12, a lower joint 13, a first shear pin 14, a second shear pin 15, a third shear pin 16, a locking ring 17, an inner stopping tooth 18, an outer stopping tooth 19, an anti-rotation pin 20, an O-shaped sealing ring 21, a pressure-holding hole 22, a pressure-holding cavity 23 and a sealing ring table 24.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention will be further described with reference to the following examples and drawings:

as shown in attached figures 1 and 2, the metal sealing packer comprises a mandrel 1, a lower joint 13, an upper slip 3, an upper cone, a metal sealing cylinder 6, a supporting sleeve, a lower cone, a lower slip 11 and a connecting sleeve 12, wherein the outer side of the lower end of the mandrel 1 is fixedly installed with the inner side of the upper end of the lower joint 13, a limiting ring table 2 is arranged on the outer side of the upper part of the mandrel 1, the outer side of the upper part of the lower joint 13 is provided with the connecting sleeve 12, the upper end of the connecting sleeve 1 is provided with a sealing ring table 24, a pressure holding cavity 23 is arranged between the lower end of the sealing ring table 24 and the upper end, a pressure-holding hole 22 which is communicated with the inside and the outside is formed in the outer side of the mandrel 1 corresponding to the position of the pressure-holding cavity 23, the lower end of the connecting sleeve 12 and the outer side of the upper part of the lower connector 13 are fixedly installed together through a first shear pin 14, and a backstop assembly capable of preventing the lower connector 13 from moving upwards relative to the connecting sleeve 12 is arranged between the connecting sleeve 12 and the lower connector 13; the outer side of the mandrel 1 corresponding to the position between the limiting ring platform 2 and the connecting sleeve 12 is sequentially sleeved with an upper slip 3, an upper cone, a metal sealing cylinder 6, a supporting sleeve, a lower cone and a lower slip 11 from top to bottom, the upper end of the upper slip 3 is abutted against the lower end of the limiting ring platform 2, the inner side of the lower part of the upper slip 3 can be radially outwardly expanded when being subjected to outward extrusion force, the upper cone comprises an upper cone section 4 and an upper connecting section 5 which are fixedly installed together from top to bottom, the upper cone section 4 is in a circular truncated cone shape with a small upper part and a large lower part, the upper end of the upper cone section 4 is positioned on the inner side of the lower end of the upper slip 3, the lower end of the upper connecting section 5 is fixedly installed together with the upper end of the metal sealing cylinder 6, and; the lower end of the lower slip 11 is abutted against the upper end of the connecting sleeve 12, the inner side of the upper part of the lower slip 11 can be radially expanded outwards when being subjected to outward extrusion force, the lower cone body comprises a lower connecting section 9 and a lower cone section 10 which are fixedly arranged from top to bottom, the lower cone section 10 is in a circular truncated cone shape with a large upper part and a small lower part, the lower end of the lower cone section 10 is positioned on the inner side of the upper end of the lower slip 11, and the upper end of the lower connecting section 9 is fixedly arranged with the lower end of the supporting sleeve; slip teeth are arranged on the outer sides of the upper slip 3 and the lower slip 11; the supporting sleeve comprises a middle conical section 7 and a middle connecting section 8 which are fixedly installed together from top to bottom, the middle conical section 7 is in a circular truncated cone shape with a small upper part and a big lower part, and the upper part of the middle conical section 7 is positioned on the inner side of the lower part of the metal sealing cylinder 6; the lower connecting section 9 and the mandrel 1 are fixedly installed together through a second shear pin 15, and the upper connecting section 5 and the mandrel 1 are fixedly installed together through a third shear pin 16. According to the requirement, because the smoothness of the inner wall of the underground casing can not meet the sealing requirement of the utility model, the preset cylinder meeting the sealing requirement is required to be connected into the underground casing, so that the preset cylinder is lowered into the designed well depth along with the underground casing; additionally, the slip elements may be any known material such as ceramic or carbide particles. In the use process, the utility model is connected into the prior known pipe string and is lowered to the middle position of the preset cylinder along with the pipe string, the pressure-building ball is put into the pipe string, the pressure-building ball falls into the ball seat of the pipe string below the utility model, because the middle channel is blocked by the pressure-building ball, the drilling fluid enters the pressure-building cavity 23 from the pressure-building hole 22, the lower joint 13 is pushed to move downwards relative to the connecting sleeve 12, and the first shear pin 14 is cut off; after the first shear pin 14 is sheared, the lower joint 13 drives the mandrel 1 to move downwards relative to the lower slip 11, so that the lower slip 11 is radially outwards expanded under the action of the lower conical section 10, slip teeth are embedded into the inner wall of the preset cylinder, and the second shear pin 15 is continuously sheared under pressurization; after the second shear pin 15 is sheared, the mandrel 1 drives the metal sealing cylinder 6 to be opposite to the supporting sleeve, so that the metal sealing cylinder 6 is expanded radially outwards under the action of the middle conical section 7, a gap between the inner wall of the preset cylinder and the outer wall of the metal sealing cylinder 6 is sealed after expansion, and a third shear pin 16 is sheared by continuous pressurization; after the third shear pin 16 is sheared off, the mandrel 1 drives the upper slip 3 to move downwards relative to the upper cone, so that the upper slip 3 is radially expanded outwards under the action of the upper cone section 4, and slip teeth are embedded into the inner wall of the preset cylinder; to sum up, through the utility model discloses realize shutoff and seat and hang.

The metal sealing packer can be further optimized or/and improved according to the actual requirement:

as shown in fig. 1 and 2, the retaining device comprises a locking ring 17, inner retaining teeth 18, outer retaining teeth 19 and an anti-rotation pin 20, the locking ring 17 is fixedly installed on the inner side of the middle part of the connecting sleeve 12, at least one group of inner retaining teeth 18 are continuously arranged on the inner side of the locking ring 17 from top to bottom, the inner retaining teeth 18 are circular platforms with straight triangular sections and narrow-down circular platforms, the outer retaining teeth 19 matched with the inner retaining teeth 18 are arranged on the outer side of the upper part of the lower joint 13 corresponding to the position of the locking ring 17, and the outer retaining teeth 19 are circular platforms with right-angled triangular sections and wide-down circular platforms; the locking ring 17 is provided with an anti-rotation opening which is through up and down, the outer side of the connecting sleeve 12 corresponding to the position of the anti-rotation opening is provided with at least one anti-rotation pin 20, and the inner end of each anti-rotation pin 20 is positioned in the anti-rotation opening. According to the requirement, the locking ring 17 can be a split ring which is known in the prior art, the upper opening of the split ring is an anti-rotation notch, and the outer side of the locking ring 17 is fixedly connected with the inner side of the connecting sleeve 12 through threads. In the using process, the mandrel 1 is prevented from moving downwards relative to the connecting sleeve 12 by arranging the locking ring 17, the inner stopping teeth 18 and the outer stopping teeth 19; the locking ring 17 and the connecting sleeve 12, which are connected by means of a thread, are prevented from rotating relative to each other by the provision of an anti-rotation pin 20.

As shown in fig. 1 and 2, the metal sealing cylinder 6 is made of brass metal material. In the use, be convenient for through such setting that the metal seal section of thick bamboo 6 atress inflation under the effect of well conic section 7 not only guarantees the utility model discloses a seal and separate the effect, still have fine high temperature resistance, resistance to pressure.

As shown in the attached drawings 1 and 2, the connecting device further comprises an O-shaped sealing ring, at least one O-shaped sealing ring is distributed between the inner side of the lower part of the supporting sleeve and the outer side of the mandrel 1 at intervals up and down, at least one O-shaped sealing ring is distributed between the inner side of the sealing ring table 24 and the outer side of the mandrel 1 at intervals up and down, and at least one O-shaped sealing ring is distributed between the outer side of the upper end of the lower joint 13 and the inner side of the. In the use, guarantee through such setting the utility model discloses the leakproofness between the part to make third shear pin 16 cut off smoothly.

As shown in the attached drawings 1 and 2, the outer side of the lower end of the mandrel 1 and the inner side of the upper end of the lower joint 13 are fixedly installed together through threads, the lower end of the upper connecting section 5 and the upper end of the metal sealing cylinder 6 are fixedly installed together through threads, and the upper end of the lower connecting section 9 and the lower end of the support sleeve are fixedly installed together through threads. In the use, be convenient for through such setting the utility model discloses dismantle and install between the part.

Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.

Claims

1. A metal sealing packer is characterized by comprising a mandrel, a lower joint, an upper slip, an upper cone, a metal sealing cylinder, a supporting sleeve, a lower cone, a lower slip and a connecting sleeve, wherein the outer side of the lower end of the mandrel is fixedly installed with the inner side of the upper end of the lower joint; the upper slips, the upper cone, the metal sealing cylinder, the supporting sleeve, the lower cone and the lower slips are sequentially sleeved on the outer side of the mandrel corresponding to the position between the limiting ring table and the connecting sleeve from top to bottom, the upper end of the upper slips is abutted against the lower end of the limiting ring table, the inner side of the lower part of the upper slips can be radially outwardly expanded when being subjected to outward extrusion force, the upper cone comprises an upper cone section and an upper connecting section which are fixedly installed together from top to bottom, the upper cone section is in a circular truncated cone shape with a small upper part and a large lower part, the upper end of the upper cone section is positioned on the inner side of the lower end of the upper slips, the lower end of the upper connecting section is fixedly installed together with the upper end of the metal sealing cylinder; the lower end of the lower slip abuts against the upper end of the connecting sleeve, the inner side of the upper part of the lower slip can be radially expanded outwards when being subjected to outward extrusion force, the lower cone body comprises a lower connecting section and a lower cone section which are fixedly arranged from top to bottom, the lower cone section is in a circular truncated cone shape with a large upper part and a small lower part, the lower end of the lower cone section is positioned on the inner side of the upper end of the lower slip, and the upper end of the lower connecting section is fixedly arranged with the lower end of the supporting sleeve; slip teeth are arranged on the outer sides of the upper slip and the lower slip; the supporting sleeve comprises a middle conical section and a middle connecting section which are fixedly installed together from top to bottom, the middle conical section is in a circular truncated cone shape with a small upper part and a big lower part, and the upper part of the middle conical section is positioned on the inner side of the lower part of the metal sealing cylinder; the lower connecting section and the mandrel are fixedly installed together through a second shear pin, and the upper connecting section and the mandrel are fixedly installed together through a third shear pin.

2. The metal seal packer of claim 1, wherein the backstop device comprises a locking ring, inner backstop teeth, outer backstop teeth and anti-rotation pins, the locking ring is fixedly installed on the inner side of the middle part of the connecting sleeve, at least one group of inner backstop teeth are continuously arranged on the inner side of the locking ring from top to bottom, the inner backstop teeth are ring platforms with straight triangular sections, the ring platforms are narrow and wide at the bottom, the outer backstop teeth matched with the inner backstop teeth are arranged on the outer side of the upper part of the lower joint corresponding to the locking ring, the outer backstop teeth are ring platforms with right-angled triangular sections, and the ring platforms are wide at the top and narrow at the bottom; the lock ring is provided with an anti-rotation opening which is communicated up and down, the outer side of the connecting sleeve corresponding to the position of the anti-rotation opening is provided with at least one anti-rotation pin, and the inner end of each anti-rotation pin is positioned in the anti-rotation opening.

3. A metal seal packer as claimed in claim 1 or claim 2, in which the metal seal cartridge is of brass metal material.

4. The metal seal packer of claim 1 or 2, further comprising O-ring seals, wherein at least one O-ring seal is spaced vertically between the inner side of the lower portion of the support sleeve and the outer side of the mandrel, at least one O-ring seal is spaced vertically between the inner side of the seal ring table and the outer side of the mandrel, and at least one O-ring seal is spaced vertically between the outer side of the upper end of the lower joint and the inner side of the upper portion of the connection sleeve.

5. The metal seal packer of claim 3, further comprising O-ring seals, wherein at least one O-ring seal is spaced vertically between the inner side of the lower portion of the support sleeve and the outer side of the mandrel, at least one O-ring seal is spaced vertically between the inner side of the seal ring table and the outer side of the mandrel, and at least one O-ring seal is spaced vertically between the outer side of the upper end of the lower coupling and the inner side of the upper portion of the coupling sleeve.

6. The metal seal packer of claim 1, 2 or 5, wherein the outer side of the lower end of the mandrel and the inner side of the upper end of the lower joint are fixedly installed together through threads, the lower end of the upper connecting section and the upper end of the metal seal cylinder are fixedly installed together through threads, and the upper end of the lower connecting section and the lower end of the support sleeve are fixedly installed together through threads.

7. The metal seal packer of claim 3, wherein the outer side of the lower end of the mandrel is fixedly mounted to the inner side of the upper end of the lower joint through threads, the lower end of the upper connecting section is fixedly mounted to the upper end of the metal seal cylinder through threads, and the upper end of the lower connecting section is fixedly mounted to the lower end of the support sleeve through threads.

8. The metal seal packer of claim 4, wherein the outer side of the lower end of the mandrel is fixedly mounted to the inner side of the upper end of the lower joint through threads, the lower end of the upper connecting section is fixedly mounted to the upper end of the metal seal cylinder through threads, and the upper end of the lower connecting section is fixedly mounted to the lower end of the support sleeve through threads.