CN115095293B - Prevent sleeve pipe and scurry suspension seal device - Google Patents
Prevent sleeve pipe and scurry suspension seal device Download PDFInfo
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- CN115095293B CN115095293B CN202210891698.5A CN202210891698A CN115095293B CN 115095293 B CN115095293 B CN 115095293B CN 202210891698 A CN202210891698 A CN 202210891698A CN 115095293 B CN115095293 B CN 115095293B
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- sleeve
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- rebound
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
Abstract
The invention provides a sleeve upward-shifting prevention suspension sealing device which comprises a support sleeve, a suspension head, a telescopic spring clamping mechanism, a suspension seat and an upward-shifting prevention baffle ring, wherein the bottom end of the support sleeve is connected with a lower sleeve; the scheme provided by the invention can prevent the well from being scrapped due to the upward channeling of the casing, so as to ensure the production, prolong the service life of the well, effectively save the cost and increase the production value.
Description
Technical Field
The invention relates to the technical field of casing hanging sealing in soluble mineral exploitation, in particular to a casing upward-shifting prevention hanging sealing device.
Background
Soluble minerals in the world are salts, trona, mirabilite, potassium salt and the like, and the soluble minerals are limited by the area of a mining area for increasing the yield, supplementing the minerals and increasing the circulating well group in the middle and later period of the circulating water solution mining adopting the horizontal butt joint well group; the old well is subjected to a large amount of well repairing work, the process is time-consuming and labor-consuming, the investment cost is increased, and the problem can not be well solved.
The classical brine recovery circulation well group consists of a horizontal well and two vertical wells, and in the drilling process of the two brine recovery vertical wells, an ore layer consists of an upper ore group and a lower ore group. When two vertical wells cannot be drilled simultaneously by two drills to determine a first mining layer, a first vertical well can be constructed first, a lower mining group is drilled, if the lower part is found to have a first mining layer with the possibility, a technical sleeve is arranged in the first mining layer with the reliability at the upper part, and a hanger is connected to the bottom of the technical sleeve. After the construction of the second vertical well is completed, the electric logging well determines whether the lower ore group also has a first-production layer with the producibility, if yes, the technical sleeve is directly lowered into the first-production layer with the producibility of the lower ore group in the second vertical well, and well completion is carried out after well cementation. A casing suspension technique is used in the first vertical well to suspend the small primary casing to the first retrievable zone of the lower mine group. Thus, the aims of saving working hours and increasing yield are achieved through the casing hanging technology.
In addition, the area of the soluble mineral area is limited, and along with the expansion of the drilling area, the yield is limited by the area of the mineral area by increasing the number of production wells, the brine in the old mineral area is extracted by using the old mineral area, and the potential extraction of the recoverable mineral is another way for ensuring the yield and improving the yield.
As the production wells approach the service life, the upper mineral layer collapses due to the fact that the lower soluble mineral layer is dissolved and mined, and many production wells have the condition that channels are blocked or central pipes are blocked by crystallization. This requires frequent handling of the trafficUnder the condition of road blockage, or using large hoisting equipment to lift a central pipe, lowering a submersible pump in a sleeve, and pumping brine to a main pipeline supply processing plant by adopting a negative pressure extraction method. However, some production wells have severely deformed the base pipe and casing due to the collapse of the upper seam, and the base pipe cannot be lifted. This has a serious impact on the throughput index of the process plant. Frequent well workover operations not only increase production costs, but also result in serious starvation of the process plant brine supply. In order to solve the problem of insufficient production, brine is urgently needed to increase the production, and a mining area is provided with a new circulation well group by drilling, so that the brine production is increased, but the new well group needs a long time from the start of circulation to the concentration reaching the production requirement, and the production amount of each circulation well group is 20-30m 3 Per h, it is evident that this way it takes a long time to complement the design yield, which will cause a huge loss to the processing plant. Most of the supplemented well groups are positioned at the edge of the mining area, and the mining area is thin, large in mining layer fluctuation, large in construction difficulty and long in construction period. Therefore, a brine production well with a special well structure is constructed in an old mining area, and a large-displacement submersible pump (more than 100m is arranged in the well 3 And/h) extracting high-concentration brine from the solution cavity of the old mining area and extracting lower potential mined ore from the newly opened edge mining area to solve the current problem.
Thus, the application of the brine production well for constructing the special well structure in the old mining area and the edge mining area well drilling is more and more important, and the market prospect is also very broad. In the exploitation wells, the traditional casing is used for hanging and sealing, the lower part is a large-dissolution cavity, well cementation cannot be carried out after hanging, the lower casing is in a freely up-down state, slag of insoluble matters in the lower-dissolution cavity can be accumulated near a screen pipe in the brine pumping process, brine in the dissolution cavity is in an active state and contains gas, when the screen pipe at the lower part is partially blocked or the brine is gushed up, the casing can be in a channeling phenomenon, after the casing is in a channeling state, the screen pipe position is changed, the sealing is also invalid, the brine concentration is reduced, and the brine cannot be effectively pumped, so that the well is scrapped.
Disclosure of Invention
The invention aims to provide a casing upward-shifting prevention suspension sealing device, which solves the problems in the prior art, prevents the well from being scrapped due to casing upward shifting, ensures production, prolongs the service life of the well, effectively saves cost and increases production value.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a sleeve upward-shifting prevention hanging sealing device which comprises a supporting sleeve, a hanging head, a telescopic spring clamping mechanism, a hanging seat and an upward-shifting prevention baffle ring, wherein the bottom end of the supporting sleeve is connected with a lower sleeve, the top end of the supporting sleeve is detachably connected with a lowering device, the hanging seat and the upward-shifting prevention baffle ring are fixedly arranged in or at the end part of the upper sleeve, the hanging seat and the upward-shifting prevention baffle ring are coaxially arranged with the upper sleeve, the hanging head is fixedly sleeved outside the supporting sleeve, the telescopic spring clamping mechanism is fixedly arranged in the supporting sleeve, the tail end of a clamping head of the telescopic spring clamping mechanism can penetrate through the wall of the supporting sleeve and move outwards of the supporting sleeve, and when the supporting sleeve moves downwards, the hanging head can be driven to penetrate through the upward-shifting prevention baffle ring and sit on the hanging seat;
when the hanging head is arranged on the hanging seat, the clamping head moves downwards to exceed the upward-shifting prevention ring, and the tail end of the clamping head can move outwards to exceed the cylindrical surface where the inner wall of the upward-shifting prevention ring is located.
Preferably, the expandable rubber layers are coated outside the supporting sleeves at two sides of the telescopic elastic clamping mechanism.
Preferably, the chuck is an elastic telescopic column, in a normal state, the chuck stretches out of the support sleeve under the action of self elasticity, and when the support sleeve is lowered until the chuck passes through the upward-shifting-preventing baffle ring, the inner wall of the upward-shifting-preventing baffle ring gives the chuck a extrusion force towards the inside of the support sleeve and enables the tail end of the chuck to move inwards.
Preferably, the telescopic elastic clamping mechanism comprises a fixed ring and a plurality of chucks, the fixed ring is nested and fixed in the supporting sleeve, the chucks are distributed on the fixed ring along the circumferential direction of the fixed ring, one side of the chucks, which faces the axis of the fixed ring, is the inner side, the other side of the chucks is the outer side, the chucks comprise clamping columns and rebound structures, the rebound structures are arranged on the inner sides of the clamping columns and are fixedly connected with the clamping columns, when the clamping columns are subjected to inward extrusion force, the elasticity of the rebound structures can be overcome, the clamping columns move inwards, and when the inward extrusion force is eliminated, the clamping columns move outwards under the rebound force of the rebound structures.
Preferably, the inner wall of the anti-upward-shifting baffle ring comprises a constant surface, the constant surface is a cylindrical surface, one end of the constant surface, which is away from the hanging seat, is connected with a gradual change surface, the gradual change surface extends from one end of the constant surface to the direction away from the constant surface and gradually approaches to the inner wall of the upper sleeve, one end of the constant surface, which is away from the gradual change surface, is connected with a baffle surface perpendicular to the constant surface, the baffle surface extends from the constant surface to the inner wall of the upper sleeve, the gradual change surface is a circular truncated cone-shaped surface, and the baffle surface is an annular surface.
Preferably, the rebound structure comprises a steel ball, a support rod and a rebound sleeve with a slot, one end of the rebound sleeve is fixedly connected with the clamping column, a plurality of slots extending from the end part to the clamping column along the length direction are formed at the other end of the rebound sleeve, a plurality of self-recovery elastic strips are formed, the slots are distributed along the circumferential direction of the rebound sleeve, the rebound sleeve is made of elastic materials, the steel ball is fixedly arranged at one end of the support rod, the other end of the support rod is fixed, when the clamping column moves inwards, the steel ball can be pushed into the rebound sleeve from one end of the rebound sleeve with the slot, each self-recovery elastic strip expands outwards under the extrusion of the steel ball, and when external force disappears, the rebound sleeve drives the clamping head to move outwards under the reaction force of the steel ball on the self-recovery elastic strips; the bottom of the rebound sleeve is also provided with a rubber ball.
Preferably, the end of the chuck penetrates out of the support sleeve through a via hole formed in the support sleeve, and at least part of the steel ball is always embedded in the rebound sleeve, so that the end of the rebound sleeve is expanded to be larger than the size of the via hole.
Preferably, the gap between the suspension seat and the suspension head is sealed by two sealing rings.
Preferably, the top end of the support sleeve is provided with a reverse wire connector, and the support sleeve is detachably connected with the lowering device through the reverse wire connector.
Preferably, the hanging seat and the anti-upward-shifting baffle ring are both used for being fixedly arranged on the inner wall of the upper sleeve at the bottommost end; the bottom end of the supporting sleeve is used for being connected with the top-most lower sleeve.
Compared with the prior art, the invention has the following technical effects:
when the hanging head of the sleeve pipe upward-shifting prevention hanging sealing device is arranged on the hanging seat, the clamping head moves downwards to exceed the upward-shifting prevention baffle ring, the tail end of the clamping head can move outwards beyond the cylindrical surface where the inner wall of the upward-shifting prevention baffle ring is positioned, and the upward-shifting prevention baffle ring and the clamping head are matched to cooperate to prevent upward shifting of a lower sleeve pipe, so that well scrapping caused by upward shifting of the lower sleeve pipe is prevented, the production is ensured, the service life of a well is prolonged, the cost is effectively saved, and the production value is increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a construction of a casing-up-flow prevention suspension seal device provided by the invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of the structure of an upper sleeve with a hanging seat and an anti-channeling ring installed;
FIG. 4 is a cross-sectional view taken along B-B in FIG. 3;
FIG. 5 is a schematic view of the structure of the support sleeve, suspension head and retractable latch mechanism;
FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;
FIG. 7 is a schematic view of the structure of the cartridge and rebound sleeve;
FIG. 8 is a schematic view of the structure of the support sleeve, suspension head and retractable latch mechanism;
FIG. 9 is a semi-sectional view of FIG. 8;
FIG. 10 is an enlarged view of the structure at I in FIG. 9;
in the figure: 1. a sleeve is arranged; 2. an anti-upward shifting ring; 3. a hanging seat; 4. a support sleeve; 5. an expandable rubber layer; 6. a telescopic spring clip mechanism; 7. a suspension head; 8. a seal ring; 9. a stop ring on the expandable rubber layer; 10. a reverse thread joint; 61. a chuck; 62. a fixing ring; 611. a clamping column; 612. a rebound sleeve; 613. rubber balls; 614. a steel ball; 615. and (5) supporting the rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a casing upward-shifting prevention suspension sealing device, which solves the problems in the prior art, prevents the well from being scrapped due to casing upward shifting, ensures production, prolongs the service life of the well, effectively saves cost and increases production value.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides a sleeve upward-shifting prevention hanging sealing device, which is shown in fig. 1-10, and comprises a supporting sleeve 4, a hanging head 7, a telescopic spring clamping mechanism 6, a hanging seat 3 and an upward-shifting prevention baffle ring 2, wherein the bottom end of the supporting sleeve 4 is used for being connected with a lower sleeve, the top end of the supporting sleeve 4 is used for being detachably connected with a lower device, the lower device is a drill string, the hanging seat 3 and the upward-shifting prevention baffle ring 2 are both fixedly arranged in or at the end part of the upper sleeve 1, the hanging seat 3 and the upward-shifting prevention baffle ring 2 are both coaxially arranged with the upper sleeve 1, the hanging head 7 is fixedly sleeved outside the supporting sleeve 4, the telescopic spring clamping mechanism 6 is fixedly arranged in the supporting sleeve 4, and the tail end of a clamping head 61 of the telescopic spring clamping mechanism 6 can penetrate through the wall of the supporting sleeve 4 and move outwards of the supporting sleeve 4, and when the supporting sleeve 4 moves downwards, the hanging head 7 can be driven to penetrate through the upward-shifting prevention baffle ring 2 and sit on the hanging seat 3; the annular gap between the support sleeve 4 and the upper sleeve 1 is sealed by a sealing structure
When the suspension head 7 is seated on the suspension seat 3, the chuck 61 moves downward beyond the anti-upward-shifting ring 2, and the end of the chuck 61 can move outward beyond the cylindrical surface where the inner wall of the anti-upward-shifting ring 2 is located, in the preferred embodiment, when the suspension head 7 is seated on the suspension seat 3, the chuck 61 moves precisely downward beyond the anti-upward-shifting ring 2, which can greatly reduce the upward shifting amplitude of the lower casing.
When the hanging head 7 of the sleeve pipe upward-shifting prevention hanging sealing device is arranged on the hanging seat 3, the clamping head 61 moves downwards to exceed the upward-shifting prevention baffle ring 2, the tail end of the clamping head 61 can move outwards beyond the cylindrical surface where the inner wall of the upward-shifting prevention baffle ring 2 is positioned, and the upward-shifting prevention baffle ring 2 and the clamping head 61 cooperate to prevent upward shifting of a lower sleeve pipe, so that well rejection caused by upward shifting of the lower sleeve pipe is prevented, production is ensured, the service life of a well is prolonged, cost is effectively saved, and production value is increased.
In another preferred embodiment, the supporting sleeves 4 on both sides of the telescopic elastic clamping mechanism 6 are respectively coated with an expandable rubber layer 5, in another preferred embodiment, a gap between the hanging seat 3 and the hanging head 7 is sealed by two sealing rings 8, the two expandable rubber layers 5 realize 5 times expansion after 24 hours of water bubbles, and the two expandable rubber layers and the lower sealing rings 8 realize sealing together, so that the purpose of an annular gap between the supporting sleeve 4 and the upper sleeve 1 is achieved.
In another preferred embodiment, the chuck 61 is an elastic telescopic column, under the action of self elasticity, the chuck 61 stretches out of the support sleeve 4 in a normal state, when the support sleeve 4 is lowered to the chuck 61 and passes through the anti-upward-shifting-stop ring 2, the inner wall of the anti-upward-shifting-stop ring 2 gives the chuck 61 a pressing force towards the inside of the support sleeve 4 and enables the tail end of the chuck 61 to move inwards, when the support sleeve 4 is lowered to the chuck 61 just exceeding the anti-upward-shifting-stop ring 2, the chuck 61 is restored to the initial position under the action of self elasticity and is matched with the anti-upward-shifting-stop ring 2, namely, when the lower sleeve is shifted upward and drives the support sleeve 4 to shift, the anti-upward-shifting-stop ring 2 can resist upward shifting of the chuck 61 and further resist upward shifting of the support sleeve 4 and the lower sleeve below.
In addition, in other embodiments, the chuck 61 may be driven by a mechanical driving mechanism to move electrically or hydraulically, and the driving is controlled by a controller, that is, the chuck 61 is retracted into the support sleeve 4 normally, and when the chuck 61 moves down to exceed the anti-top-jump ring 2, the driving device drives the chuck 61 to extend and cooperate with the anti-top-jump ring 2.
In another preferred embodiment, the retractable spring clip mechanism 6 includes a fixing ring 62 and a plurality of clips 61, the fixing ring 62 is nested and fixed in the supporting sleeve 4, the clips 61 are arranged on the fixing ring 62 along the circumferential direction of the fixing ring 62, preferably 4 clips 61,4 are uniformly arranged along a circumference, that is, 90 degrees included angle exists between each other, each clip 61 extends along the radial direction of the fixing ring 62, one side of the clip 61 facing the axis of the fixing ring 62 is the inner side, the other side is the outer side, the clip 61 includes a clip post 611 and a rebound structure, the rebound structure is arranged on the inner side of the clip post 611 and is fixedly connected with the clip post 611, when the clip post 611 receives the inward extrusion force, the clip post 611 can overcome the elasticity of the rebound structure and move inwards, and when the inward extrusion force is eliminated, the clip post 611 moves outwards under the rebound force of the rebound structure.
In another preferred embodiment, the inner wall of the anti-upward-shifting baffle ring 2 comprises a constant surface, the constant surface is a cylindrical surface, one end of the constant surface, which is away from the hanging seat 3, is connected with a gradual change surface, the gradual change surface extends from one end of the constant surface to the direction away from the constant surface and gradually approaches to the inner wall of the upper sleeve 1, one end of the constant surface, which is away from the gradual change surface, is connected with a baffle surface perpendicular to the constant surface, the baffle surface extends from the constant surface to the inner wall of the upper sleeve 1, the gradual change surface is a circular truncated cone-shaped surface, two ends of the gradual change surface are respectively connected with the inner wall of the upper sleeve 1 and the constant surface, the baffle surface is an annular surface, the gradual change surface is arranged so as to facilitate compression of the clamping head 61, and the gradual change surface has a guiding function.
In another preferred embodiment, the rebound structure comprises a steel ball 614, a support rod 615 and a rebound sleeve 612 with slits, one end of the rebound sleeve 612 is fixedly connected with the clamping column 611, a plurality of slits extending from the end part to the clamping column 611 along the length direction are uniformly distributed in six and form a plurality of self-recovery elastic strips, the slits are distributed along the circumferential direction of the rebound sleeve 612, the rebound sleeve 612 is made of elastic materials, one end of the support rod 615 is fixedly provided with the steel ball 614, the other end is fixed, when the clamping column 611 moves inwards, the steel ball 614 can be pushed into the rebound sleeve 612 from the end of the rebound sleeve 612 with slits, the respective recovery elastic strips outwards expand under the extrusion of the steel ball 614, and when the external force disappears, the rebound sleeve 612 outwards drives the clamping head 61 to move under the reaction force of the steel ball 614; the bottom of the rebound sleeve 612 is also provided with a rubber ball 613, the rebound sleeve 612 and the clamping post 611 are of an integrated structure, the diameter of an inner hole of the rebound sleeve 612 is one millimeter smaller than that of the steel ball 614, when the steel ball 614 moves towards the clamping post 611 in the rebound sleeve 612, the self-recovery elastic strip elastically deforms, when the steel ball 614 contacts the rubber ball 613, the rubber ball 613 elastically deforms to prop against the steel ball 614, at the moment, the clamping head 61 just moves down to a constant surface and keeps the state to move down, and after the clamping head 61 passes through the upward-shifting prevention baffle ring 2, the limiting wall surface outside the clamping head 61 disappears, and the self-recovery elastic strip and the rubber ball 613 recover the original shape and push the steel ball 614 to move outwards of the rebound sleeve 612; in other embodiments, the resilient structure may also be a compressible and resilient structure such as a spring, a rubber column, or the like.
In another preferred embodiment, the end of the chuck 61 is threaded out of the support sleeve 4 through a via hole formed in the support sleeve 4, and at least a portion of the steel ball 614 is always embedded within the rebound sleeve 612 such that the end of the rebound sleeve 612 expands to a size greater than the via hole to prevent the chuck 61 from ejecting from the via hole and to facilitate movement of the steel ball 614 into the rebound sleeve 612.
In another preferred embodiment the top end of the support sleeve 4 is provided with a counter-wire connection 10, the support sleeve 4 being detachably connected to the running device by means of the counter-wire connection 10, in this embodiment the running sleeve and the support sleeve 4 are lowered by means of a drill string, the end of which is detachably connected to the counter-wire connection 10.
In another preferred embodiment, the hanging seat 3 and the anti-upward-shifting ring 2 are both used for being fixedly arranged on the inner wall of the upper sleeve 1 at the bottommost end; the bottom end of the support sleeve 4 is adapted to be connected to the topmost lower sleeve.
When the casing pipe upward-shifting prevention suspension sealing device provided by the invention is used, firstly, the suspension seat 3 and the upward-shifting prevention baffle ring 2 are arranged in a first upper casing pipe 1 to be lowered or at two ends of the first upper casing pipe, a circular column-shaped limit space is formed between the suspension seat 3 and the upward-shifting prevention baffle ring 2, all the upper casing pipes 1 are lowered in sequence, cement well cementation is carried out, after waiting for solidification, two drilling is carried out until the designed depth enters a brine dissolving cavity, a screen pipe, a lower casing pipe and a support casing pipe 4 fixedly connected with the lower casing pipe are fed into a well, specifically, the lowering depth of the screen pipe is firstly determined according to a logging result, then the use length of the lower casing pipe and a drill stem is calculated, and then the support casing pipe 4 is arranged at the top of the last lower casing pipe to be lowered, and the drill stem is fed into the well. At the top of the support sleeve 4 is a reverse run joint 10 for retrieving the drill string after completion of running.
Specifically, in the process of lowering the screen pipe, the lower casing and the support casing 4, the size of the telescopic elastic clamping mechanism 6 in the normal state is slightly smaller than the inner diameter of the upper casing 1, so that the telescopic elastic clamping mechanism 6 is always in an unstressed state before reaching the upper-channeling-preventing stop ring 2, when the telescopic elastic clamping mechanism is lowered until the clamping head 61 contacts with the gradual change surface, the inner diameter of the gradual change surface gradually becomes smaller, the clamping head 61 is extruded, so that the clamping head 61 moves into the support casing 4, when the clamping head 61 moves down to contact with the constant surface, the clamping head 61 stops moving, the kept state moves down to exceed the constant surface, the extrusion force born by the clamping head 61 disappears, the initial state is self-restored, the telescopic elastic clamping mechanism extends to the position right below the blocking surface, and at the moment, the suspension head 7 is just seated on the suspension seat 3, the suspension seat 3 plays a suspension role on the support casing 4 and the lower casing, the drill rod string is rotated clockwise, the drill rod string is unscrewed from the anti-thread joint 10, and the string is recovered.
The upper sleeve 1 in the invention is an outer sleeve or called an upper sleeve, and the lower sleeve is an inner sleeve or called a lower sleeve.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a prevent sleeve pipe and scurry suspension seal device which characterized in that: the telescopic elastic clamping mechanism is fixedly arranged in the supporting sleeve, the tail end of a clamping head of the telescopic elastic clamping mechanism can penetrate through the wall of the supporting sleeve and move outwards of the supporting sleeve, and the supporting sleeve can drive the hanging head to penetrate through the upper elastic clamping ring and sit on the hanging seat when moving downwards;
when the suspension head is seated on the suspension seat, the clamping head moves downwards to exceed the upward-shifting prevention ring, and the tail end of the clamping head can move outwards to be beyond the cylindrical surface where the inner wall of the upward-shifting prevention ring is located; the clamping head is an elastic telescopic column, and in a normal state, the clamping head stretches out of the supporting sleeve under the action of self elasticity, and when the supporting sleeve is lowered until the clamping head passes through the anti-upward shifting baffle ring, the inner wall of the anti-upward shifting baffle ring gives the clamping head a extrusion force towards the inside of the supporting sleeve and enables the tail end of the clamping head to move inwards;
the telescopic elastic clamping mechanism comprises a fixed ring and a plurality of clamping heads, the fixed ring is nested and fixed in the supporting sleeve, the clamping heads are arranged on the fixed ring along the circumferential direction of the fixed ring, one side, facing the axis of the fixed ring, of the clamping head is the inner side, the other side is the outer side, the clamping heads comprise clamping columns and rebound structures, the rebound structures are arranged on the inner sides of the clamping columns and are fixedly connected with the clamping columns, when the clamping columns are subjected to inward extrusion force, the elasticity of the rebound structures can be overcome, and when the inward extrusion force is eliminated, the clamping columns move outwards under the rebound force of the rebound structures;
the elastic structure comprises a steel ball, a support rod and an elastic sleeve with slits, one end of the elastic sleeve is fixedly connected with the clamping column, a plurality of slits extending from the end part to the clamping column along the length direction are formed in the other end of the elastic sleeve, the slits are distributed along the circumferential direction of the elastic sleeve, the elastic sleeve is made of elastic materials, the steel ball is fixedly arranged at one end of the support rod, the other end of the support rod is fixed, when the clamping column moves inwards, the steel ball can jack into the elastic sleeve from one end of the elastic sleeve, provided with the slits, each elastic strip expands outwards under the extrusion of the steel ball, and when external force disappears, the elastic sleeve drives the clamping head to move outwards under the reactive force of the steel ball under the action of the elastic strips; the bottom of the rebound sleeve is also provided with a rubber ball.
2. The casing run-up prevention suspension seal device of claim 1, wherein: the expandable rubber layers are coated outside the supporting sleeves at two sides of the telescopic spring clamping mechanism.
3. The casing run-up prevention suspension seal device of claim 1, wherein: the anti-channeling stop ring inner wall comprises a constant surface, the constant surface is a cylindrical surface, one end of the constant surface, which is away from the hanging seat, is connected with a gradual change surface, the gradual change surface extends from one end of the constant surface to the direction away from the constant surface and gradually approaches to the upper sleeve inner wall, one end of the constant surface, which is away from the gradual change surface, is connected with a stop surface perpendicular to the constant surface, the stop surface extends from the constant surface to the upper sleeve inner wall, the gradual change surface is a circular truncated cone-shaped surface, and the stop surface is an annular surface.
4. The casing run-up prevention suspension seal device of claim 1, wherein: the tail end of the clamping head penetrates out of the supporting sleeve through a through hole formed in the supporting sleeve, at least part of the steel ball is always embedded in the rebound sleeve, and therefore the end part of the rebound sleeve is expanded to be larger than the size of the through hole.
5. The casing run-up prevention suspension seal device of claim 1, wherein: the gap between the suspension seat and the suspension head is sealed by two sealing rings.
6. The casing run-up prevention suspension seal device of claim 1, wherein: the top end of the support sleeve is provided with a reverse wire connector, and the support sleeve is detachably connected with the lowering device through the reverse wire connector.
7. The casing run-up prevention suspension seal device of claim 1, wherein: the hanging seat and the upward-shifting-preventing ring are both used for being fixedly arranged on the inner wall of the upper sleeve at the bottommost end; the bottom end of the supporting sleeve is used for being connected with the top-most lower sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210891698.5A CN115095293B (en) | 2022-07-27 | 2022-07-27 | Prevent sleeve pipe and scurry suspension seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210891698.5A CN115095293B (en) | 2022-07-27 | 2022-07-27 | Prevent sleeve pipe and scurry suspension seal device |
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| Publication Number | Publication Date |
|---|---|
| CN115095293A CN115095293A (en) | 2022-09-23 |
| CN115095293B true CN115095293B (en) | 2023-10-13 |
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| CN202210891698.5A Active CN115095293B (en) | 2022-07-27 | 2022-07-27 | Prevent sleeve pipe and scurry suspension seal device |
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| CN112282681A (en) * | 2020-10-27 | 2021-01-29 | 中国石油大学(华东) | Casing hanger and sealing assembly lowering tool |
| CN212535622U (en) * | 2020-06-30 | 2021-02-12 | 山西省煤炭地质勘查研究院 | Device for running and recovering pressure-relief gas ground extraction well screen pipe under well |
| CN217055075U (en) * | 2021-12-30 | 2022-07-26 | 大庆楠北科技有限公司 | Upward movement preventing device for perforating pipe column |
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| CN212535622U (en) * | 2020-06-30 | 2021-02-12 | 山西省煤炭地质勘查研究院 | Device for running and recovering pressure-relief gas ground extraction well screen pipe under well |
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| CN217055075U (en) * | 2021-12-30 | 2022-07-26 | 大庆楠北科技有限公司 | Upward movement preventing device for perforating pipe column |
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| CN115095293A (en) | 2022-09-23 |
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