CN106321008A

CN106321008A - Seal cartridge for correcting casing eccentricity

Info

Publication number: CN106321008A
Application number: CN201610911518.XA
Authority: CN
Inventors: 秦志坚; 邹勇; 常和林; 伍华益; 祖玉刚
Original assignee: JIANGSU JINSHI MACHINERY GROUP CO Ltd
Current assignee: JIANGSU JINSHI MACHINERY GROUP CO Ltd
Priority date: 2016-10-20
Filing date: 2016-10-20
Publication date: 2017-01-11

Abstract

The invention discloses a seal cartridge for correcting casing eccentricity. The seal cartridge comprises an outer ring body (4) and an inner ring body (5), wherein an 'FS' type seal ring (1) is mounted in an 'FS' type seal ring groove (8); a first O-shaped ring (2) is mounted in a dovetail groove (11), a second O-shaped ring (6) is mounted in a seal ring groove (12); the inner ring body (5) is located on an inner hole end surface of the outer ring body (4) and connected with the outer ring body through a gasket (3) and a screw (7), and the seal cartridge for correcting in-situ casing eccentricity is obtained wholly. The seal cartridge is simple in structure, easy to mount and convenient to adjust, the seal cartridge is synchronously shifted according to the actual shifting condition of a casing under the conditions that the casing shifts to a certain degree and is not centered, so that the ideal state of casing centralization is realized, and the seal cartridge has an auxiliary sealing effect under the condition that primary seal of a slip hanger fails.

Description

Correct the sealing shroud of casing eccentricity

Technical field

The present invention relates to sealing device, be specifically related to a kind of sealing shroud correcting casing eccentricity.

Background technology

At present, known hanging device for slips casing sealing shroud may be only available for on-the-spot sleeve pipe and is between two parties, do not offsets Perfect condition, but practical situation part tubular often installs several millimeters of the skew that there will be in various degree, or when initially installing Casing centralization but well cementation rear sleeve there will be small skew, therefore in the case of skew occurs in sleeve pipe, conventional rubber is installed Glue sealing shroud can bring following difficulty: the sleeve pipe 1. offset understand some cooperate, with sealing shroud, the magnitude of interference sealed can be relatively Increasing, this will cause the in-site installation sealing shroud can be extremely difficult, it is difficult to is correctly installed to four-way junction of casing body interior, even before The rubber seal that meeting breakseal puts, causes seal failure；2. another part (opposite direction of offset direction) of sleeve pipe with Gap between sealing shroud can be strengthened, and sealed increscence amount reduces, and even there will be and does not has magnitude of interference situation, causes seal failure.

Summary of the invention

It is an object of the invention to: a kind of sealing shroud correcting casing eccentricity, simple in construction are provided, install easily, regulation Convenient, be seated in casing head inner chamber slips hanger upper end, sleeve pipe occur to a certain degree skew, placed in the middle in the case of, root According to sleeve pipe actual shifts situation, sealing shroud is carried out simultaneous bias, be in perfect condition placed in the middle reaching sleeve pipe, and at slips Hanger primary seal effectively played auxiliary seal effect in the case of losing efficacy.

The present invention solves the scheme of technical problem: this sealing shroud includes outer ring body and inner ring body, inner ring body Set " FS " RunddichtringO groove on endoporus wall, inner ring body set screw connecting hole, screw connecting hole has pad installation step, The interior hole end surface of outer ring body sets dovetail groove, and the outside wall surface of outer ring body sets seal groove, installs in " FS " RunddichtringO groove " " installing No. two " O " type circles in installing " O " type circle, seal groove in RunddichtringO, dovetail groove, inner ring body is seated in FS Link together on the interior hole end surface of outer ring body and by pad, screw, be monolithically fabricated the sealing correcting on-the-spot casing eccentricity Set.

Wherein, inner ring body also sets lifting screwed hole.

The invention have the advantages that

1, " FS " RunddichtringO is arranged on " FS " RunddichtringO groove of inner ring body, can follow inner ring body and offset, with On-the-spot sleeve pipe realizes coordinating, sealing.

2, " O " type circle is arranged in the dovetail groove of interior hole end surface of outer ring body, this O realize inner ring body with The sealing on end face of the outer ring body, and excite by tightening screw.

3, pad is arranged on inner ring body and uses with screw fit, when when about inner ring body, skew is adjusted, and pad Sheet adds the real contact area of the aperture end face with inner ring body, it is ensured that stationarity and the lock ability of screw.

4, outer ring body is located slips hanger upper end, and No. two " O " type circles realize joining with the upper end endoporus of casing head body Closing, seal, outer ring body position remains that invariant state, coupled screw position also remain in an unchanged state.

5, skew, placed in the middle occur when on-the-spot sleeve pipe, in the case of no matter offseting toward which side, this sealing shroud can realize Follow sleeve pipe offset direction to be adjusted, put in place guaranteeing that sealing shroud can be installed smoothly, it is to avoid blocked portion phenomenon.

6, the ingenious design having introduced screw, pad of the present invention, compensates screw and the inner ring of loss in bigger migration process Contact area between body, can effectively realize the connection between inner ring body and outer ring body and positive sealing.

7, this sealing shroud simple in construction, installs easy to adjust, with low cost, and practicality is very strong, and sleeve pipe hangs at the scene In the case of leakage occurs in device primary seal, can install very convenient, efficiently and put in place, by on-the-spot sleeve pipe side-play amount number Realize the sealing of sleeve pipe.

8, the Design Theory pressure voltage of this sealing shroud is 69MPa(10000psi).

Accompanying drawing explanation

Fig. 1 is the structural representation of the present invention.

Fig. 2 is the inner ring body construction schematic diagram of Fig. 1.

Fig. 3 is that the A-A of Fig. 2 is to sectional view.

Fig. 4 is the sealing shroud installation site schematic diagram of Fig. 1.

Fig. 5 is between two parties for on-the-spot sleeve pipe, not shift state figure.

Fig. 6 is in the most between two parties for on-the-spot sleeve pipe, shift state figure to the right.

Fig. 7 is in not placed in the middle, left shift state diagram for on-the-spot sleeve pipe.

In figure: 1 " FS " RunddichtringO, No. 2 " O " type circles, 3 pads, 4 outer ring bodies, 5 inner ring bodies, 6 No. two " O " types Circle, 7 screws, 8 " FS " RunddichtringO groove, 9 screw connecting holes, 10 pad installation steps, 11 dovetail grooves, 12 seal grooves, 13 Hang screwed hole, 14 sleeve pipes, 15 slips hangers, 16 casing head bodies.

Detailed description of the invention

Structure Figure further illustrates the technical solution of the present invention below, but is not to be construed as technical scheme Limit.

As Figure 1-3, this sealing shroud includes outer ring body 4 and inner ring body 5, and the endoporus wall of inner ring body 5 sets " " RunddichtringO groove 8, inner ring body 5 sets FS screw connecting hole 9, and screw connecting hole 9 has pad installation step 10, and outer ring is originally The interior hole end surface of body 4 sets dovetail groove 11, and the outside wall surface of outer ring body 4 sets seal groove 12, peace in " FS " RunddichtringO groove 8 Dress " FS " RunddichtringO 1, installs " O " type circle 2 in dovetail groove 11, install No. two " O " type circles 6, inner ring in seal groove 12 Body 5 is seated on the interior hole end surface of outer ring body 4 and is linked together by pad 3, screw 7, is monolithically fabricated correction scene The sealing shroud of casing eccentricity.

Wherein, inner ring body 5 also sets lifting screwed hole 13.

When this sealing shroud is installed at the scene, itself and sleeve pipe 14, slips hanger 15 and position such as Fig. 4 of casing head body 16 Shown in, outer ring body 4 is seated in slips hanger 15 upper end, and No. two " O " type circles 6 will realize with casing head body 16 upper end endoporus Coordinating, seal, " FS " RunddichtringO 1 in inner ring body 5 coordinates with sleeve pipe 14, seals.

There will be following three kinds of states coordinating between this sealing shroud with sleeve pipe:

1. when on-the-spot sleeve pipe be between two parties, not shift state time, inner ring and the outer ring of sealing shroud are in concentric, such as Fig. 5 institute Show, size A with size B apart from equal.

2. when on-the-spot sleeve pipe be in the most between two parties, shift state to the right time, now inner ring and outer ring are in not concentric, as Shown in Fig. 6, sleeve pipe offset distance C to the right, then size A1=A-C, B1=B+C, when sealing shroud is installed inner ring be also required to accordingly to Right overall offset, utilizes the preset clearance between inner ring and outer ring to compensate the simultaneous bias of inner ring, needs to consider scene herein Sleeve pipe real offset also designs the limit offset amount of sealing shroud accordingly.

3., when on-the-spot sleeve pipe is in placed in the middle, left shift state, now inner ring and outer ring body are in different heart shaped State, as it is shown in fig. 7, sleeve pipe left shift distance C, then size A2=A+C, B2=B-C, when installing sealing shroud, inner ring is also required to phase The overall offset to the left answered, needs consider on-the-spot sleeve pipe real offset and design the limit of eccentric sealed set accordingly herein Side-play amount.

Claims

1. correct the sealing shroud of on-the-spot casing eccentricity, it is characterized in that: this sealing shroud includes outer ring body (4) and inner ring body (5), Set " FS " RunddichtringO groove (8) on the endoporus wall of inner ring body (5), inner ring body (5) sets screw connecting hole (9), screw Pad installation step (10), the interior hole end surface of outer ring body (4) is had to set dovetail groove (11) on connecting hole (9), outer ring body (4) Set seal groove (12) in outside wall surface, peace in " FS " RunddichtringO (1), dovetail groove (11) is installed in " FS " RunddichtringO groove (8) Filling " O " type circle (2), install No. two " O " type circles (6) in seal groove (12), inner ring body (5) is seated in outer ring body (4) link together on interior hole end surface and by pad (3), screw (7), be monolithically fabricated the sealing correcting on-the-spot casing eccentricity Set.

The sealing shroud correcting on-the-spot casing eccentricity the most according to claim 1, is characterized in that: inner ring body also sets on (5) Lifting screwed hole (13).