CN213330987U - Pressure relief device for casing hydraulic repair tool and casing repair tubular column - Google Patents
Pressure relief device for casing hydraulic repair tool and casing repair tubular column Download PDFInfo
- Publication number
- CN213330987U CN213330987U CN202021961440.0U CN202021961440U CN213330987U CN 213330987 U CN213330987 U CN 213330987U CN 202021961440 U CN202021961440 U CN 202021961440U CN 213330987 U CN213330987 U CN 213330987U
- Authority
- CN
- China
- Prior art keywords
- pressure relief
- wall
- sleeve
- pipe
- connecting pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pipe Accessories (AREA)
Abstract
The utility model relates to a pressure relief device and sleeve pipe restoration tubular column for sleeve pipe hydraulic pressure repair instrument, wherein, pressure relief device includes the outer tube, can be equipped with bottom end confined inner tube at the axial slip ground spacer sleeve in the outer tube, is equipped with pressure release cover, spring and seal cover from last to overlapping in proper order down in the middle part outside of inner tube. An inner conical surface with the diameter gradually expanding downwards is formed on the inner wall of the middle part of the outer pipe, a pressure relief hole is formed in the pipe wall of the middle part of the outer pipe, and a first limiting step with the diameter reduced is formed on the inner wall of the middle part of the outer pipe upwards. The outer wall of the upper portion of the pressure relief sleeve forms an outer conical surface matched with the inner conical surface, the outer conical surface can abut against the inner conical surface, the pressure relief hole can be blocked by the pressure relief sleeve, and the upper end of the sealing sleeve abuts against the first limiting step. The utility model discloses can realize automatic pressure release after the completion is restoreed to deformation sleeve's stroke, and the signal is obvious, can accurately judge whether the completion is restoreed to sleeve pipe hydraulic pressure repairing tool, has improved the security of instrument operation.
Description
Technical Field
The utility model relates to a technical field is restoreed to the oil industry sleeve pipe, especially relates to a pressure relief device and sleeve pipe restoration tubular column for sleeve pipe hydraulic pressure repairing tool, and the automatic pressure release is realized to the deformation sleeve pipe restoration completion back to specially adapted hydraulic pressure repairing tool.
Background
In the middle and later periods of development of oil and gas fields, the casing of the oil and gas well is frequently deformed, necked down, damaged and the like due to the long-term corrosion of formation pressure action and various substances, the normal operation and production of the oil and gas well are directly influenced, and the oil and gas well can be stopped or even scrapped when the oil and gas well is serious, so that economic loss is caused. To the problems that the casing pipe appears, a special instrument is required to be used for detecting the casing pipe condition firstly, the position and the deformation degree of the deformation of the casing pipe are determined, then the casing pipe hydraulic repairing tool is divided into a plurality of strokes to be gradually lowered, and the parts of the deformed casing pipe can be repaired in a segmented mode by sequentially pressing, so that a casing pipe channel is restored, and the later normal production of an oil-gas well is ensured.
However, after the repair of one stroke of the conventional casing hydraulic repair tool is finished, the pressure cannot be released, and the casing hydraulic repair tool can only be continuously driven downwards and then pressed to repair the next stroke. Although the pressure can reach the preset value through pressing, whether the casing hydraulic repairing tool smoothly moves downwards for a stroke distance under the pressure cannot be known, and no clear signal can be used for judging, so that the casing hydraulic repairing tool possibly stops moving downwards only after moving downwards for a part of the stroke, and the part of the stroke in one stroke is not repaired. The repair of the next stroke is then performed by partially passing the unrepaired stroke over so that the deformed casing is not effectively repaired. And the whole process is always in a pressure building state, and the operation process has safety risks.
Therefore, the inventor provides the pressure relief device for the casing hydraulic repairing tool and the casing repairing string by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pressure relief device and sleeve pipe restoration tubular column for sleeve pipe hydraulic pressure repairing tool can realize automatic pressure release after the completion is restoreed to a stroke of deformation sleeve pipe, and the signal is obvious, can accurately judge whether the completion is restoreed to sleeve pipe hydraulic pressure repairing tool, has improved the security of instrument operation.
The purpose of the utility model can be realized by adopting the following technical scheme:
the utility model provides a pressure relief device for a casing hydraulic repair tool, which comprises an outer pipe which is vertically arranged, wherein an inner pipe with a closed bottom end is sleeved in the outer pipe at intervals in an axially sliding manner, the lower end of the inner pipe extends out of the outer pipe, a pressure relief sleeve, a spring and a sealing sleeve are sequentially sleeved on the outer side of the middle part of the inner pipe from top to bottom, and two ends of the spring are respectively propped between the pressure relief sleeve and the sealing sleeve; an inner conical surface with the diameter gradually expanding downwards is formed on the inner wall of the middle part of the outer pipe, a pressure relief hole is formed in the middle pipe wall of the outer pipe and below the inner conical surface, a first limiting step with the diameter reduced is formed on the inner wall of the middle part of the outer pipe and below the pressure relief hole, and a second limiting step with the diameter reduced is formed on the inner wall of the lower end of the outer pipe downwards; the outer wall of the upper part of the pressure relief sleeve forms an outer conical surface matched with the inner conical surface, the outer conical surface can be abutted against the inner conical surface, the pressure relief sleeve can block the pressure relief hole, and the upper end of the sealing sleeve is abutted against the first limiting step; a first convex ring is formed on the outer side of the upper end of the inner pipe in an outward protruding mode, and a second convex ring, a third convex ring and a fourth convex ring with sequentially increased diameters are formed on the outer wall of the middle of the inner pipe in a downward protruding mode; the outer diameters of the first convex ring and the third convex ring are smaller than the inner diameter of the outer tube, a first preset distance is reserved between the first convex ring and the pressure relief sleeve, the lower end of the pressure relief sleeve can abut against the second convex ring, and the lower end of the sealing sleeve can abut against the third convex ring; a liquid inlet hole is formed in the pipe wall of the inner pipe and corresponds to the position of the third convex ring, a second preset distance is reserved between the lower end of the fourth convex ring and the second limiting step, and the outer walls of the pressure relief sleeve, the sealing sleeve and the fourth convex ring are in sealing contact with the inner wall of the outer pipe.
In a preferred embodiment of the present invention, the outer wall of the pressure relief sleeve is provided with a first annular groove above and below the outer conical surface, and a first sealing ring is embedded in the first annular groove.
The utility model discloses an among the preferred embodiment, at the middle part inner wall of outer tube and be located and downwards form the third spacing step that the diameter reduces between interior conical surface and the first spacing step, the lower extreme of pressure release cover can support and lean on the third spacing step.
The utility model discloses an in a preferred embodiment, the upper end outer wall of seal cover upwards forms the ladder cover that the diameter reduces, and the bottom outside of ladder cover forms the ladder portion, and the ladder portion pushes up to lean on first spacing step, and the both ends of spring push up respectively to between the lower extreme of pressure release cover and the upper end of ladder cover.
The utility model discloses an in a preferred embodiment, set up the second annular groove in the outer wall of seal cover and be located ladder cover below to inlay at the second annular groove and be equipped with the second sealing washer.
In a preferred embodiment of the present invention, a groove is formed on the inner wall of the sealing sleeve to penetrate the top and bottom surfaces thereof.
In a preferred embodiment of the present invention, a third ring groove is disposed on the outer wall of the fourth bulge loop, and a third sealing ring is embedded in the third ring groove.
In a preferred embodiment of the present invention, the outer tube comprises a feeding connection tube, a pressure relief connection tube, a lower connection tube and a supporting connection tube which are sequentially connected from top to bottom, the inner conical surface is formed on the inner wall of the lower end of the feeding connection tube, the pressure relief hole and the first limiting step are formed on the pressure relief connection tube, and the second limiting step is formed on the supporting connection tube; the outer diameter of the first convex ring is smaller than the inner diameter of the feeding connecting pipe, and the outer diameter of the third convex ring is smaller than the inner diameter of the lower connecting pipe; the outer wall of the pressure relief sleeve is in sealing contact with the inner wall of the feeding connecting pipe and the pressure relief connecting pipe, and the outer walls of the sealing sleeve and the fourth convex ring are in sealing contact with the inner wall of the lower connecting pipe.
In a preferred embodiment of the present invention, the lower end outer wall of the feeding pipe is in threaded connection with the upper end inner wall of the pressure relief pipe, the lower end outer wall of the pressure relief pipe is in threaded connection with the upper end inner wall of the lower connection pipe, and the lower end inner wall of the lower connection pipe is in threaded connection with the upper end outer wall of the support pipe; the lower end face of the pressure relief connecting pipe forms a first limiting step, and the upper end face of the support connecting pipe forms a second limiting step.
In a preferred embodiment of the present invention, an inner thread is formed on the inner wall of the upper end of the outer tube, and an outer thread is formed on the outer wall of the lower end of the inner tube.
The utility model also provides a tubular column is restoreed to sleeve pipe, include:
the pressure relief device for the casing hydraulic repair tool is described above;
and the upper end of the casing hydraulic repairing tool is connected with the lower end of the inner pipe.
In a preferred embodiment of the present invention, a drill rod or an oil pipe is connected to the upper end of the outer pipe.
From above, the utility model discloses a cooperation of inner tube, pressure release cover, spring and seal cover, the pressure release hole is in the shutoff state when initial position, suppress and promote the inner tube after certain stroke of downstream alright open the pressure release hole, realize automatic pressure release. The pressure gauge reading on the surface will suddenly change to 0 during automatic pressure relief, thus enabling a clear pressure relief signal to be generated. When using it in sleeve pipe hydraulic pressure repair tools, alright in order to realize automatic pressure release after a stroke repair of sleeve pipe hydraulic pressure repair tools is accomplished, the phenomenon of suppressing pressure always can not appear, and the signal is obvious when automatic pressure release moreover, according to whether automatic pressure release at every turn alright whether repair the completion with accurate judgement, guaranteed whole deformation sleeve's smooth repair completion, improved the security and the reliability of construction greatly.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: for the utility model provides a pressure relief device for sleeve pipe hydraulic pressure repair tools is at the schematic diagram of initial position.
FIG. 2: for the utility model provides a pressure relief device for sleeve pipe hydraulic pressure repair tools is at the schematic structure diagram after the pressure release hole is opened.
FIG. 3: which is a partial enlargement at a in fig. 2. Wherein the arrows in fig. 3 represent the flow direction of the liquid.
FIG. 4: to the utility model provides a structural schematic diagram of inner tube.
FIG. 5: do the utility model provides a send into the structural schematic diagram of takeover.
FIG. 6: does the utility model provides a pressure relief sleeve's structural schematic.
FIG. 7: do the utility model provides a structural schematic diagram of seal cover.
FIG. 8: is a top view of fig. 7.
The reference numbers illustrate:
1. an outer tube; 11. feeding into a connecting pipe; 111. an inner conical surface; 12. a pressure relief connecting pipe; 121. a pressure relief vent; 122. a first limit step; 123. a third limiting step; 13. a lower connection pipe; 14. supporting the connecting pipe; 141. a second limit step;
2. an inner tube; 21. a first convex ring; 22. a second convex ring; 23. a third convex ring; 231. a liquid inlet hole; 24. a fourth convex ring; 241. a third ring groove;
3. a pressure relief sleeve; 31. an outer conical surface; 32. a first ring groove;
4. a spring;
5. sealing sleeves; 51. a step sleeve; 52. a second ring groove; 53. and (4) a groove.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 to 8, this embodiment provides a pressure relief device for casing hydraulic repair tool, including the outer tube 1 of vertical setting, the inner tube 2 with closed bottom is equipped with at interval cover to the internal energy axial slip ground in the outer tube 1, and the lower extreme of inner tube 2 stretches out outer tube 1, is equipped with pressure relief cover 3, spring 4 and seal cover 5 from last to overlapping in proper order down in the middle part outside of inner tube 2, and the both ends of spring 4 are pushed up respectively and are supported between pressure relief cover 3 and seal cover 5.
The inner wall of the middle part of the outer tube 1 forms an inner conical surface 111 with a diameter gradually expanding downwards, a pressure relief hole 121 is formed below the inner conical surface 111 and on the wall of the middle part of the outer tube 1, a first limiting step 122 with a reduced diameter is formed below the pressure relief hole 121 and on the inner wall of the middle part of the outer tube 1, and a second limiting step 141 with a reduced diameter is formed downwards on the inner wall of the lower end of the outer tube 1. The outer wall of the upper part of the pressure relief sleeve 3 forms an outer conical surface 31 matched with the inner conical surface 111, the outer conical surface 31 can abut against the inner conical surface 111, the pressure relief sleeve 3 can block the pressure relief hole 121, and the upper end of the sealing sleeve 5 abuts against the first limiting step 122.
A first convex ring 21 is formed on the outer side of the upper end of the inner pipe 2 in an outward protruding mode, and a second convex ring 22, a third convex ring 23 and a fourth convex ring 24 with diameters sequentially increased are formed on the outer wall of the middle of the inner pipe 2 in a downward protruding mode. The external diameter of first bulge loop 21 and third bulge loop 23 all is less than the internal diameter of outer tube 1, leaves first preset distance between first bulge loop 21 and the pressure release cover 3, and the lower extreme of pressure release cover 3 can support and lean on second bulge loop 22, and the lower extreme of seal cover 5 can support and lean on third bulge loop 23. The liquid inlet hole 231 is formed in the pipe wall of the inner pipe 2 and corresponds to the position of the third convex ring 23, a second preset distance is reserved between the lower end of the fourth convex ring 24 and the second limiting step 141, and the outer walls of the pressure relief sleeve 3, the sealing sleeve 5 and the fourth convex ring 24 are in sealing contact with the inner wall of the outer pipe 1.
Specifically, the second convex ring 22, the third convex ring 23 and the fourth convex ring 24 are connected with each other, the bottom of the fourth convex ring 24 is retracted inward in diameter, and the lower end of the inner pipe 2 and the portion below the fourth convex ring 24 can be extended out of the outer pipe 1. The maximum outer diameter of the outer tube 1 is generally 100mm, and the outer tube can be applied to a half-sleeve with a specification of 5 inches, of course, the specific size is determined according to the requirement, and the embodiment is only an example. In the initial position (i.e. before pressing), as shown in fig. 1, the outer conical surface 31 of the pressure relief sleeve 3 abuts against the inner conical surface 111 of the inner wall of the outer tube 1, and the pressure relief hole 121 is blocked by the pressure relief sleeve 3; the lower end of the pressure relief sleeve 3 abuts against the second convex ring 22 to limit the pressure relief sleeve 3, so that the pressure relief hole 121 is prevented from being opened in advance due to downward movement of the pressure relief sleeve 3 in the initial position; the lower end of the sealing sleeve 5 abuts against the third convex ring 23 to limit the sealing sleeve 5. When the inner pipe 2 is pressed, liquid enters from the liquid inlet 231, and a part of the liquid pushes up the sealing sleeve 5, so that the sealing sleeve 5 cannot move downwards; another part of the liquid pushes the fourth collar 24 downwards and pushes the whole inner tube 2 to slide downwards, at which time the first collar 21 also slides downwards together.
Before first bulge loop 21 leaned on pressure release cover 3, all there is the clearance because all sealedly between the outer wall of pressure release cover 3's inner wall and seal cover 5 and inner tube 2, a small part of liquid flows through the clearance between first bulge loop 21 and outer tube 1 inner wall after, can flow into the annular space at the position place of spring 4 through the clearance between the outer wall of the inner wall of pressure release cover 3 and inner tube 2, and when the partly liquid that gets into feed liquor hole 231 upwards pushed up seal cover 5, also can get into the annular space at the position place of spring 4 through the clearance between the outer wall of inner tube 2 and the inner wall of seal cover 5. Because the bottom cross sectional area of pressure release cover 3 is greater than the top cross sectional area of pressure release cover 3, consequently, pressure release cover 3 can upwards promote pressure release cover 3 under the effect of both ends pressure differential for pressure release cover 3 can not move downwards this moment, and pressure release hole 121 still is in the shutoff state. When the first convex ring 21 abuts against the pressure relief sleeve 3, the pressure relief sleeve 3 is pushed downwards and the spring 4 is compressed, and when the inner tube 2 slides downwards until the fourth convex ring 24 abuts against the second limit step 141, the pressure relief hole 121 is opened, as shown in fig. 2 and 3, liquid can flow out of the outer tube 1 through the gap between the first convex ring 21 and the inner wall of the outer tube 1, the gap between the outer conical surface 31 and the inner conical surface 111 after being staggered and the pressure relief hole 121, so that automatic pressure relief is realized.
When the device is used, a drill rod or an oil pipe is connected with the upper end of the outer pipe 1, the lower end of the inner pipe 2 is connected with a casing hydraulic repairing tool, and then the whole pipe column is lowered to the position where the casing is deformed. Connect on ground and suppress the pipeline, utilize high-pressure pump truck or slush pump to suppress, hydraulic pressure passes through on drilling rod or oil pipe transmit inner tube 2, under hydraulic drive, promote inner tube 2 and sleeve pipe hydraulic pressure repair instrument down together, can realize the restoration to warping the sleeve pipe passageway after the sleeve pipe hydraulic pressure repair instrument is down, the stroke of inner tube 2 downstream reaches behind the certain distance, spring 4 is compressed, pressure release hole 121 will be opened, this moment liquid alright through the automatic pressure release of pressure release hole 121, this moment through subaerial manometer reading will become 0 suddenly, alright in order to judge automatic pressure release.
The second preset distance is equal to the distance that the sleeve hydraulic repairing tool can just complete one stroke repairing, so that the sleeve hydraulic repairing tool just automatically releases pressure after completing one stroke repairing. If automatic pressure relief is not carried out all the time during construction, the casing hydraulic repairing tool does not finish a stroke, and pressurization can be carried out at the moment so as to ensure that the casing hydraulic repairing tool finishes a stroke and repair is finished. After one stroke is repaired, the pipe column is continuously put in, the inner pipe 2 is not moved at the moment, the outer pipe 1 moves downwards, the first limiting step 122 pushes the sealing sleeve 5 to move downwards together, the pressure relief sleeve 3 is pushed to move downwards together after the inner conical surface 111 abuts against the outer conical surface 31, and after the pressure relief sleeve is put in a specified position, all parts in the whole pressure relief device restore to the initial position again. And then, the pressure is pressed again, so that the next stroke of repairing operation can be continued, the pressure can be automatically released after the next stroke of repairing operation is finished, and the like is repeated until the repairing operation of all strokes is finished.
From this, pressure relief device in this embodiment, through the cooperation of inner tube 2, pressure relief cover 3, spring 4 and seal cover 5, pressure relief hole 121 is in the shutoff state when initial position, suppresses and promotes inner tube 2 and remove behind the certain stroke downwards alright open pressure relief hole 121, realizes automatic pressure release. The pressure gauge reading on the surface will suddenly change to 0 during automatic pressure relief, thus enabling a clear pressure relief signal to be generated. When using it in sleeve pipe hydraulic pressure repair tools, alright in order to realize automatic pressure release after a stroke repair of sleeve pipe hydraulic pressure repair tools is accomplished, the phenomenon of suppressing pressure always can not appear, and the signal is obvious when automatic pressure release moreover, according to whether automatic pressure release at every turn alright whether repair the completion with accurate judgement, guaranteed whole deformation sleeve's smooth repair completion, improved the security and the reliability of construction greatly.
In a specific implementation manner, in order to facilitate the sealing between the pressure relief sleeve 3 and the inner wall of the outer tube 1, as shown in fig. 1 and 6, first ring grooves 32 are respectively formed in the outer wall of the pressure relief sleeve 3 and above and below the outer conical surface 31, and first sealing rings are embedded in the first ring grooves 32. The outer tapered surface 31 and the inner tapered surface 111 of the outer tube 1 can also have a certain sealing function when abutting against each other.
Generally, in order to perform a better limiting function on the pressure relief sleeve 3, as shown in fig. 1 to 3, a third limiting step 123 with a reduced diameter is formed downwards on the middle inner wall of the outer tube 1 and between the inner conical surface 111 and the first limiting step 122, and the lower end of the pressure relief sleeve 3 can abut against the third limiting step 123. Thus, when the inner tube 2 slides downwards until the fourth protruding ring 24 abuts against the second limit step 141, the pressure relief hole 121 is opened, and the lower end of the pressure relief sleeve 3 just abuts against the third limit step 123.
Further, in order to facilitate the processing and installation of the sealing sleeve 5, as shown in fig. 1, 7 and 8, a stepped sleeve 51 with a reduced diameter is formed on the outer wall of the upper end of the sealing sleeve 5, a stepped portion is formed on the outer side of the bottom of the stepped sleeve 51, the stepped portion abuts against the first limiting step 122, and two ends of the spring 4 respectively abut against between the lower end of the pressure relief sleeve 3 and the upper end of the stepped sleeve 51.
In order to facilitate the sealing between the sealing sleeve 5 and the inner wall of the outer tube 1, a second annular groove 52 is formed in the outer wall of the sealing sleeve 5 and below the stepped sleeve 51, and a second sealing ring is embedded in the second annular groove 52.
In order to prevent impurities in the liquid from blocking after the liquid enters the annular space where the spring 4 is located, and thus to prevent the normal movement of the pressure relief sleeve 3, a groove 53 is formed on the inner wall of the sealing sleeve 5 to penetrate through the top and bottom surfaces thereof. Thus, the impurities in the liquid can be partially discharged downwards through the groove 53, and blockage is avoided.
In order to facilitate the sealing between the fourth protruding ring 24 and the inner wall of the outer tube 1, as shown in fig. 1 and 4, a third ring groove 241 is formed in the outer wall of the fourth protruding ring 24, and a third sealing ring is embedded in the third ring groove 241.
In practical application, in order to facilitate the processing and installation of the outer tube 1, as shown in fig. 1, the outer tube 1 includes a feeding connection tube 11, a pressure relief connection tube 12, a lower connection tube 13 and a supporting connection tube 14 which are sequentially connected from top to bottom, an inner conical surface 111 is formed on the inner wall of the lower end of the feeding connection tube 11, a pressure relief hole 121, a first limit step 122 and a third limit step 123 are formed on the pressure relief connection tube 12, and a second limit step 141 is formed on the supporting connection tube 14. The first male ring 21 has an outer diameter smaller than the inner diameter of the feed nipple 11, and the third male ring 23 has an outer diameter smaller than the inner diameter of the lower nipple 13. The outer wall of the pressure relief sleeve 3 is in sealing contact with the inner walls of the feeding connecting pipe 11 and the pressure relief connecting pipe 12, and the outer walls of the sealing sleeve 5 and the fourth convex ring 24 are in sealing contact with the inner wall of the lower connecting pipe 13.
Generally, the outer wall of the lower end of the feeding connecting pipe 11 is in threaded connection with the inner wall of the upper end of the pressure relief connecting pipe 12, the outer wall of the lower end of the pressure relief connecting pipe 12 is in threaded connection with the inner wall of the upper end of the lower connecting pipe 13, and the inner wall of the lower end of the lower connecting pipe 13 is in threaded connection with the outer wall of the upper end of the support connecting pipe 14. The lower end surface of the pressure relief connecting pipe 12 forms a first limit step 122, and the upper end surface of the support connecting pipe 14 forms a second limit step 141.
In order to facilitate the connection of the two ends of the pressure relief device with a drill rod or an oil pipe and a casing hydraulic repair tool respectively, an internal thread is formed on the inner wall of the upper end of the outer pipe 1, and an external thread is formed on the outer wall of the lower end of the inner pipe 2.
Further, this embodiment still provides a casing restoration tubular column, including foretell pressure relief device and the casing hydraulic pressure restoration instrument that is used for casing hydraulic pressure restoration instrument, the upper end of casing hydraulic pressure restoration instrument is connected with the lower extreme of inner tube 2. The specific structure of the casing hydraulic repairing tool is the prior art, and is not described in detail herein.
A drill pipe or tubing is typically connected to the upper end of the outer tube 1 to facilitate running the string into a desired location downhole. The operation of the entire pipe string is described in detail in the previous operation of the pressure relief device, and is not described in detail herein. Through set up foretell pressure relief device in the tubular column, can realize automatic pressure release after deformation sleeve pipe is restoreed, and the signal is clear and definite, improved the security and the reliability of operation greatly, guaranteed prosthetic completion smoothly.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (12)
1. A pressure relief device for a casing hydraulic repair tool is characterized by comprising an outer tube which is vertically arranged, wherein an inner tube with a closed bottom end is sleeved in the outer tube in an axially sliding manner at intervals, the lower end of the inner tube extends out of the outer tube, a pressure relief sleeve, a spring and a sealing sleeve are sequentially sleeved on the outer side of the middle part of the inner tube from top to bottom, and two ends of the spring are respectively propped between the pressure relief sleeve and the sealing sleeve;
an inner conical surface with the diameter gradually expanding downwards is formed on the inner wall of the middle part of the outer pipe, a pressure relief hole is formed in the middle pipe wall of the outer pipe and below the inner conical surface, a first limiting step with the diameter reduced is formed on the middle inner wall of the outer pipe and below the pressure relief hole, and a second limiting step with the diameter reduced is formed on the lower end inner wall of the outer pipe downwards; the outer wall of the upper part of the pressure relief sleeve forms an outer conical surface matched with the inner conical surface, the outer conical surface can abut against the inner conical surface, the pressure relief sleeve can block the pressure relief hole, and the upper end of the sealing sleeve abuts against the first limiting step;
a first convex ring is formed at the outer side of the upper end of the inner pipe in an outward protruding mode, and a second convex ring, a third convex ring and a fourth convex ring with sequentially increased diameters are formed at the outer wall of the middle of the inner pipe in a downward protruding mode; the outer diameters of the first convex ring and the third convex ring are smaller than the inner diameter of the outer tube, a first preset distance is reserved between the first convex ring and the pressure relief sleeve, the lower end of the pressure relief sleeve can abut against the second convex ring, and the lower end of the sealing sleeve can abut against the third convex ring; a liquid inlet hole is formed in the pipe wall of the inner pipe and corresponds to the position of the third convex ring, a second preset distance is reserved between the lower end of the fourth convex ring and the second limiting step, and the outer walls of the pressure relief sleeve, the sealing sleeve and the fourth convex ring are in sealing contact with the inner wall of the outer pipe.
2. The pressure relief device for a casing hydraulic repair tool of claim 1,
the outer wall of the pressure relief sleeve is positioned above and below the outer conical surface and is respectively provided with a first annular groove, and a first sealing ring is embedded in the first annular groove.
3. The pressure relief device for a casing hydraulic repair tool of claim 1,
and a third limiting step with the diameter reduced is formed downwards between the inner conical surface and the first limiting step on the inner wall of the middle part of the outer pipe, and the lower end of the pressure relief sleeve can abut against the third limiting step.
4. The pressure relief device for a casing hydraulic repair tool of claim 1,
the outer wall of the upper end of the sealing sleeve upwards forms a stepped sleeve with the diameter reduced, a stepped part is formed on the outer side of the bottom of the stepped sleeve and abuts against the first limiting step, and two ends of the spring respectively abut against the position between the lower end of the pressure relief sleeve and the upper end of the stepped sleeve.
5. The pressure relief device for a casing hydraulic repair tool of claim 4,
and a second annular groove is formed in the outer wall of the sealing sleeve and below the stepped sleeve, and a second sealing ring is embedded in the second annular groove.
6. The pressure relief device for a casing hydraulic repair tool of claim 1,
and a groove penetrating through the top surface and the bottom surface of the sealing sleeve is formed on the inner wall of the sealing sleeve.
7. The pressure relief device for a casing hydraulic repair tool of claim 1,
and a third ring groove is formed in the outer wall of the fourth convex ring, and a third sealing ring is embedded in the third ring groove.
8. The pressure relief device for a casing hydraulic repair tool of claim 1,
the outer pipe comprises a feeding connecting pipe, a pressure relief connecting pipe, a lower connecting pipe and a support connecting pipe which are sequentially connected from top to bottom, the inner conical surface is formed on the inner wall of the lower end of the feeding connecting pipe, the pressure relief hole and the first limiting step are formed on the pressure relief connecting pipe, and the second limiting step is formed on the support connecting pipe;
the outer diameter of the first convex ring is smaller than the inner diameter of the feeding connecting pipe, and the outer diameter of the third convex ring is smaller than the inner diameter of the lower connecting pipe; the outer wall of the pressure relief sleeve is in sealing contact with the inner walls of the feeding connecting pipe and the pressure relief connecting pipe, and the outer walls of the sealing sleeve and the fourth convex ring are in sealing contact with the inner wall of the lower connecting pipe.
9. The pressure relief device for a casing hydraulic repair tool of claim 8,
the outer wall of the lower end of the feeding connecting pipe is in threaded connection with the inner wall of the upper end of the pressure relief connecting pipe, the outer wall of the lower end of the pressure relief connecting pipe is in threaded connection with the inner wall of the upper end of the lower connecting pipe, and the inner wall of the lower end of the lower connecting pipe is in threaded connection with the outer wall of the upper end of the support connecting pipe; the lower end face of the pressure relief connecting pipe forms the first limiting step, and the upper end face of the support connecting pipe forms the second limiting step.
10. The pressure relief device for a casing hydraulic repair tool of claim 1,
and internal threads are formed on the inner wall of the upper end of the outer pipe, and external threads are formed on the outer wall of the lower end of the inner pipe.
11. A casing repair string, comprising:
a pressure relief device for a casing hydraulic repair tool as claimed in any one of claims 1 to 10;
and the upper end of the casing hydraulic repairing tool is connected with the lower end of the inner pipe.
12. The casing repair string of claim 11,
the upper end of the outer pipe is connected with a drill pipe or an oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021961440.0U CN213330987U (en) | 2020-09-09 | 2020-09-09 | Pressure relief device for casing hydraulic repair tool and casing repair tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021961440.0U CN213330987U (en) | 2020-09-09 | 2020-09-09 | Pressure relief device for casing hydraulic repair tool and casing repair tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213330987U true CN213330987U (en) | 2021-06-01 |
Family
ID=76061100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021961440.0U Active CN213330987U (en) | 2020-09-09 | 2020-09-09 | Pressure relief device for casing hydraulic repair tool and casing repair tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213330987U (en) |
-
2020
- 2020-09-09 CN CN202021961440.0U patent/CN213330987U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104213861B (en) | A kind of expansion tube expanding process and tool system | |
| CA2453063C (en) | Liner hanger | |
| US9267345B2 (en) | Flow activated circulating valve | |
| US2953919A (en) | Pipe testing apparatus | |
| US2828698A (en) | Gas lift valve assembly | |
| CN104929603A (en) | Infinite stage type sectional cracking method for sleeve | |
| CA2834253A1 (en) | Smart hydraulic pumping device for recovery of oil and obtaining of information from the bottom of the reservoir | |
| CN211851765U (en) | Tension packer | |
| WO2017071517A1 (en) | Apparatus and method for establishing oil well in-well sand control pipe particle flow channel | |
| CN109779563B (en) | Combined oil pump for preventing well flushing from polluting oil layer | |
| RU185225U1 (en) | Highly tight male threaded connection of large-diameter thin-walled electric-welded casing pipes | |
| CN213330987U (en) | Pressure relief device for casing hydraulic repair tool and casing repair tubular column | |
| CN112302563B (en) | Ultrashort-clamping-distance water injection sand prevention packer and operation method thereof | |
| CN110513070B (en) | Flap type downhole oil pipe hydraulic control blowout preventer | |
| US4647085A (en) | Sealing arrangement for pin and box threaded connection of tubular members | |
| CN115434665B (en) | Shaft switching tool free of well killing and underground operation and process method | |
| CN110617025A (en) | Pumping type casing pipe plugging tool for tubing running without pressure and using method thereof | |
| CN108999590B (en) | Profile control tool, separate injection profile control integrated pipe column and process | |
| CN210859161U (en) | Hydraulic control blowout preventer for pump oil pipe | |
| CN215213485U (en) | Accurate leakage finding process pipe column for casing coupling | |
| CN106949264B (en) | Underground check valve | |
| CN116066000A (en) | Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof | |
| CN220133948U (en) | Pressure limiting valve device for petroleum underground operation | |
| CN210105823U (en) | Large-drift-diameter ball seat for cleaning and well completion | |
| CN113090224A (en) | Guide shoe for well cementation and expansion suspension well cementation tubular column |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |