CN114458156B - A high pressure water jet conveying device - Google Patents
A high pressure water jet conveying device Download PDFInfo
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- CN114458156B CN114458156B CN202011135172.1A CN202011135172A CN114458156B CN 114458156 B CN114458156 B CN 114458156B CN 202011135172 A CN202011135172 A CN 202011135172A CN 114458156 B CN114458156 B CN 114458156B
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- pipe column
- sealing
- pressure transmission
- pressure
- water jet
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 106
- 230000005540 biological transmission Effects 0.000 claims abstract description 66
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000002018 water-jet injection Methods 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims description 35
- 238000007906 compression Methods 0.000 claims description 35
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 14
- 238000005553 drilling Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a high-pressure water jet conveying device, which comprises a continuous pipe column, an external pipe column, a dynamic sealing assembly and a pressure transmission channel, wherein the external pipe column is enclosed with the continuous pipe column to form a high-pressure water jet injection annulus, the dynamic sealing assembly is used for sealing the injection annulus, the pressure transmission channel is used for providing sealing pressure for the dynamic sealing assembly, and the pressure transmission channel is communicated with the dynamic sealing assembly and is arranged on the external pipe column; the dynamic seal assembly radially contracts and tightly holds the continuous pipe column when fluid is injected into the pressure transmission channel; and a through hole which is communicated with the injection annulus and the inside of the continuous pipe column is formed in the continuous pipe column. The invention has the advantages of reducing hydraulic loss, improving rock breaking efficiency, along with simple and compact structure, etc.
Description
Technical Field
The invention relates to the field of rock breaking of petroleum and natural gas drilling, in particular to a high-pressure water jet conveying device.
Background
A large number of slot holes exist around the near-wellbore of the existing carbonate reservoir, and all-dimensional communication is realized by a radial hydraulic jet drilling completion technology, so that the reserve utilization degree is greatly improved. The existing high-pressure water jet conveying mode is to inject high-speed fluid from the inside of the continuous pipe column, break rock through a nozzle at the end of the continuous pipe column, and realize rock breaking drilling. Because the diameter of the continuous pipe column is small, the conveying mode is large in abrasion resistance and large in hydraulic power along-distance loss, under the condition of certain total hydraulic power, the injected hydraulic power is insufficient, the rock breaking efficiency is affected, and the stratum with deep reservoir burial is more obvious; and the mode of improving the total hydrodynamic force to achieve the rock breaking efficiency has high cost and poor economy.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects of the prior art and providing the high-pressure water jet conveying device which reduces hydraulic loss, improves rock breaking efficiency and has a simple and compact structure.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
The high-pressure water jet conveying device comprises a continuous pipe column, an external pipe column, a dynamic sealing assembly and a pressure transmission channel, wherein the external pipe column is enclosed with the continuous pipe column to form a high-pressure water jet injection annulus, the dynamic sealing assembly is used for sealing the injection annulus, the pressure transmission channel is used for providing sealing pressure for the dynamic sealing assembly, and the pressure transmission channel is communicated with the dynamic sealing assembly and is arranged on the external pipe column; the dynamic seal assembly radially contracts and tightly holds the continuous pipe column when fluid is injected into the pressure transmission channel; and a through hole which is communicated with the injection annulus and the inside of the continuous pipe column is formed in the continuous pipe column.
As a further improvement of the above technical scheme:
The dynamic seal assembly comprises a pressure transmission sleeve, a compression ring and an annular seal ring which are sequentially sleeved from outside to inside, wherein the pressure transmission channel wraps the pressure transmission sleeve; the compression ring comprises a plurality of arc-shaped sections which are arranged at intervals along the circumferential direction of the pressure transmission sleeve, and deformation gaps which provide radial deformation space of the compression ring are reserved among the arc-shaped sections; and the annular sealing ring is in sealing fit with the continuous pipe column under the radial acting force of the compression ring.
The inside of annular space sealing washer is equipped with two symmetrical arrangement's seal tooth, two seal tooth's inside angle encloses to close and forms the storage space of storing fluid and silt, seal tooth's outside angle is the angle of guaranteeing that the sealing washer has sealed and lubricated function concurrently and is standard selection.
The annular sealing rings are arranged in the axial direction of the pressure transmission sleeve, adjacent annular sealing rings are separated by an intermediate ring, and support rings are arranged on the outer sides of the annular sealing rings at the two ends; the number of the compression rings is the same as that of the annular sealing rings, and the compression rings are arranged in one-to-one correspondence with the annular sealing rings.
The arc sections of adjacent compression rings are staggered.
The two ends of the pressure transmission sleeve are pressed between the support ring and the external tubular column, and sealing components for preventing fluid leakage are arranged on two sides of the pressing position of the pressure transmission sleeve.
The pressure transmission channels are multiple groups, and the multiple groups of pressure transmission channels are arranged at intervals along the circumferential direction of the dynamic seal assembly; each group of pressure transmission channels comprises an oil guide hole, a radial opening groove and an annular pressurizing groove which are sequentially communicated, and the annular pressurizing groove wraps the dynamic sealing assembly.
The dynamic seal assembly and the pressure transmission channel are two groups, the two groups of dynamic seal assemblies are arranged along the axial direction of the continuous pipe column, the pressure transmission channel of the upper dynamic seal assembly is communicated with the injection annulus, and the pressure transmission channel of the lower dynamic seal assembly is communicated with the lower well bottom.
The external pipe column comprises an upper joint, a lower joint and a dynamic seal joint connected between the upper joint and the lower joint, and the two groups of dynamic seal assemblies are respectively and axially limited between the dynamic seal joint and the upper joint and between the dynamic seal joint and the lower joint.
The high-pressure water jet conveying device also comprises two groups of centralizers for centralizing the continuous pipe columns; the upper joint and the lower joint comprise an upper mounting section and a lower mounting section which are mutually connected; the two groups of centralizers are respectively arranged on the upper joint and the lower joint and are limited between the upper mounting section and the lower mounting section
Compared with the prior art, the invention has the advantages that:
The outer tubular column and the continuous tubular column are enclosed to form an injection annulus of high-pressure water jet, the injection annulus is sealed by the dynamic seal assembly, and the sealing pressure of the dynamic seal assembly is provided by the pressure transmission channel. The injection annulus of the high-pressure water jet from the external pipe column and the continuous pipe column is injected, the injection mode of the existing continuous pipe column is changed, the injection space is increased, the on-way resistance loss of the hydraulic friction and the hydrodynamic force is reduced, the hydrodynamic force of the nozzle is increased, the problem of high hydraulic loss of the continuous pipe column is solved, and the rock breaking efficiency is improved.
Meanwhile, the dynamic sealing assembly contracts and holds the continuous pipe column tightly when the pressure transmission channel is filled with fluid so as to seal the injection annulus, and the continuous pipe column is provided with a through hole, so that high-pressure water jet is led into the continuous pipe column from the through hole after reaching the sealing position of the injection annulus, and the purpose that the high-pressure water jet is sprayed out from the end part of the continuous pipe column is achieved. Therefore, the injection mode of the existing high-pressure fluid is changed creatively, and the rock breaking efficiency is greatly improved; meanwhile, the external pipe column is sleeved outside the continuous pipe column, the pressure transmission channel and the dynamic sealing assembly are arranged in the external pipe column, and the whole structure is simple and compact, occupies small space and is low in cost.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a schematic structural view of a rock breaking drilling fluid conveying apparatus according to the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a cross-sectional view of section B-B of fig. 2.
Fig. 4 is a schematic structural view of the dynamic seal assembly.
FIG. 5 is a schematic illustration of the positional relationship of an annular seal ring and a compression ring.
Fig. 6 is a top view of fig. 5.
The reference numerals in the drawings denote:
1. An outer tubular string; 11. an upper joint; 12. a lower joint; 13. a dynamic seal joint; 14. an upper mounting section; 15. a lower mounting section; 2. injecting into the annulus; 3. a dynamic seal assembly; 31. a pressure transmission sleeve; 32. a compression ring; 321. an arc section; 322. a deformation gap; 33. an annulus seal ring; 331. sealing teeth; 332. an inside corner; 333. an outside angle; 34. an intermediate ring; 35. a support ring; 4. a pressure transmission channel; 41. an oil guide hole; 42. a radial open slot; 43. an annular pressurizing groove; 5. a sealing member; 6. a centralizer.
Detailed Description
The invention will now be described in further detail with reference to the drawings and the specific examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, the high-pressure water jet transport device of the present embodiment includes a continuous pipe string, an outer pipe string 1, a dynamic seal assembly 3, and a pressure transmission passage 4. The outer pipe column 1 is sleeved outside the continuous pipe column to enclose an injection annulus 2 for forming high-pressure water jet; the pressure transmission channel 4 and the dynamic seal assembly 3 are arranged on the external pipe column 1, and the pressure transmission channel 4 is communicated with the dynamic seal assembly 3 to provide sealing pressure of the dynamic seal assembly 3; the dynamic seal assembly 3 radially contracts and tightly holds the continuous pipe column when the pressure transmission channel 4 is filled with fluid so as to seal the injection annulus 2; the continuous pipe column is provided with a through hole for communicating the injection annulus 2 with the inside of the continuous pipe column.
The arrangement form of the invention ensures that high-pressure water jet is injected from the injection annulus 2 of the outer pipe column 1 and the continuous pipe column, changes the injection mode of the existing continuous pipe column, increases the injection space, reduces the along-way resistance loss of the hydraulic friction and the hydrodynamic force, increases the hydrodynamic force of the nozzle, solves the problem of large hydraulic loss of the continuous pipe column, and improves the rock breaking efficiency. Meanwhile, the dynamic seal assembly 3 contracts and tightly holds the continuous pipe column to seal the injection annulus 2 when the pressure transmission channel 4 is used for injecting fluid, and the continuous pipe column is provided with a through hole, so that high-pressure water jet is led into the continuous pipe column from the through hole after reaching the sealing position of the injection annulus 2, and the purpose that the high-pressure water jet is sprayed out from the end part of the continuous pipe column is achieved.
The invention changes the injection mode of the existing high-pressure fluid creatively, and greatly improves the rock breaking efficiency; meanwhile, the external pipe column is sleeved outside the continuous pipe column, the pressure transmission channel 4 and the dynamic sealing assembly 3 are arranged in the external pipe column 1, and the whole structure is simple and compact, the occupied space is small, and the cost is low.
In this embodiment, the working principle of the high-pressure water jet conveying device is as follows: after the string is run into the well, high-velocity fluid is pumped in, travels downhole from the injection annulus 2 of the string and the outer string 1, and is blocked from entering the string from the injection annulus 2 only through the string through-holes when encountering the dynamic seal assembly 3. At the same time of injecting fluid at high speed, the continuous pipe column is lowered at a certain speed, the continuous pipe column passes through the dynamic seal assembly 3 in a sliding mode, at this time, the dynamic seal assembly 3 still has a certain sealing capacity, the fluid is ensured to enter the stratum through the through holes completely, and the dynamic seal assembly 3 is not damaged after construction.
As shown in fig. 2 and 3, the dynamic seal assembly 3 includes a pressure transmission sleeve 31, a compression ring 32 and an annular seal 33 which are sleeved in sequence from outside to inside. Wherein the pressure transmission sleeve 31 effectively isolates high-pressure fluid and transmits pressure to the compression ring 32 to provide radial movement acting force of the dynamic seal assembly 3; the pressure transmission channel 4 wraps the pressure transmission sleeve 31, so that high-pressure fluid acts on the pressure transmission sleeve 31 through the pressure transmission channel 4.
Meanwhile, as shown in fig. 6, the compression ring 32 includes a plurality of arc segments 321. The plurality of arc segments 321 are arranged at intervals along the circumferential direction of the pressure transmission sleeve 31, and deformation gaps 322 are reserved among the arc segments 321, wherein the deformation gaps 322 provide a space for radial deformation of the compression ring 32, so that the annular sealing ring 33 is in sealing fit with the continuous pipe column under the radial acting force of the compression ring 32. The dynamic seal assembly has compact structure and small occupied space, and the dynamic seal assembly 3 can control the contact pressure with the sealing surface of the continuous pipe column through radial spacing, thereby realizing follow-up control and playing the role of injecting annular space seal.
As shown in fig. 5, two sealing teeth 331 are symmetrically arranged on the inner side of the annular sealing ring 33, so that dynamic sealing effect can be achieved in two directions when the continuous pipe column is lifted up and lowered down, and reciprocating sealing of the continuous pipe column is achieved. The inner corners 332 of the two sealing teeth 331 are enclosed to form a storage space for storing oil and sediment; the outside angle 333 of the sealing tooth 331 is an angle which ensures that the sealing ring has both sealing and lubricating functions and is standard, so that a dynamic pressure oil film can be formed when the continuous pipe column passes through, the dynamic sealing assembly 3 can bear high pressure in a sliding state, and dynamic sealing of the continuous pipe column during bottom hole sliding is realized.
In this embodiment, the outside angle 333 of the seal tooth 331 is greater than the inside angle 332, the outside angle 333 is 70 ° and the inside angle 332 is 20 °. In other embodiments, the angles of the inside and outside angles of the seal teeth 331 may be adjusted as practical, so long as sliding of the string and effective sealing of the injection annulus 2 are ensured.
Further, as shown in fig. 6, the number of the arc segments 321 of the compression ring 32 is four, and the four arc segments 321 are uniformly distributed along the circumferential direction of the pressure transmission sleeve 31, so that the acting force uniformly acts on the annular sealing ring 33, the circumferential contact pressure generated on the sealing surface of the continuous pipe column is uniform, the occurrence of local leakage is avoided, and the sealing reliability is ensured. When the compression ring 32 receives the pressure transmitted by the pressure transmission sleeve 31, the arc sections 321 are radially closed, so that the annular sealing ring 33 is extruded, the contact pressure on the sealing surface of the continuous pipe column is increased, and the sealing purpose is achieved.
Further, the rounded corners are arranged at the two ends of the arc-shaped sections 321, so that when the gap between the adjacent arc-shaped sections 321 changes, the ends of the arc-shaped sections 321 damage the pressure transmission sleeve 31 and the annular sealing ring 33, the working reliability of the dynamic sealing assembly 3 is ensured, and the service life is prolonged.
In this embodiment, the angle of the arc segments 321 is 88 ° to 89 °, so that a certain deformation gap 322 is formed between the arc segments 321. In other embodiments, the angle of the arcuate segments 321 may be adjusted as practical, so long as an effective seal of the injection annulus 2 is ensured.
As shown in fig. 4, the number of the annular sealing rings 33 is four, the four annular sealing rings 33 are arranged along the axial direction of the pressure transmission sleeve 31, adjacent annular sealing rings 33 are separated by an intermediate ring 34, and support rings 35 are arranged on the outer sides of the annular sealing rings 33 at two ends; the number of the compression rings 32 is the same as the number of the annular sealing rings 33, and the compression rings 32 are arranged in one-to-one correspondence with the annular sealing rings 33. In other embodiments, the number of annulus seals 33 may be set based on the roughness, finish of the tubing string, and the material of the dynamic seal assembly 3, so long as an effective seal of the injection annulus 2 is ensured.
The dynamic sealing performance is improved in a mode of combining a plurality of annular sealing rings 33 and the compression rings 32, and meanwhile, when part of the compression rings 32 and the annular sealing rings 33 fail, the other compression rings 32 and the annular sealing rings 33 can still realize the function of reciprocating sealing, so that the sealing reliability and the service life are high, and the installation and the replacement are convenient.
Further, the arcuate segments 321 of adjacent compression rings 32 are angularly offset to provide uniform circumferential contact pressure on the sealing surface of the string to further ensure effective sealing of the injection annulus 2. In this embodiment, the arc segments 321 of adjacent compression rings 32 are offset by 45 °, and in other embodiments, the offset angle may be adjusted according to the actual situation.
Further, the thickness of the annular sealing ring 33 is larger than that of the compression ring 32, so as to increase the sealing area of the annular sealing ring 33, the intermediate ring 34 and the support ring 35, and reduce the leakage of high-pressure water jet from the end face of the annular sealing ring 33. In this embodiment, the material of the pressure transmission sleeve 31 and the annular seal 33 in contact with the fluid is polytetrafluoroethylene with high temperature resistance and extremely low friction coefficient.
As shown in fig. 2, both end portions of the pressure transmitting sleeve 31 are compressed between the support ring 35 and the outer column 1, and both sides of the compressed position of the pressure transmitting sleeve 31 are provided with sealing members 5 to prevent leakage of fluid. In the embodiment, two sealing parts 5 are respectively arranged at two sides of the pressing position of the pressure transmission sleeve 31 so as to improve the sealing performance; the sealing part 5 is an O-shaped sealing ring, and the O-shaped sealing ring is made of fluororubber, hydrogenated nitrile rubber or polyurethane.
As shown in fig. 3, the pressure transmission channels 4 are four groups, the four groups of pressure transmission channels 4 are uniformly arranged along the circumferential direction of the dynamic seal assembly 3, and the four groups of pressure transmission channels 4 are arranged in one-to-one correspondence with the arc-shaped sections 321 of the compression ring 32, so that the compression ring 32 is uniformly stressed. In other embodiments, the number of pressure transfer channels 4 may be adjusted according to the area of excess flow required for the actual seal.
In the present embodiment, each group of pressure transmitting channels 4 includes an oil guide hole 41, a radial open groove 42, and an annular pressure groove 43. Wherein, oil guide hole 41, radial open groove 42 and annular pressurization groove 43 communicate in proper order, and annular pressurization groove 43 wraps up movable seal assembly 3. The high-pressure fluid acts on the pressure transmission sleeve 31 through the oil guide hole 41, the radial opening groove 42 and the annular pressurizing groove 43, and the high-pressure fluid is rapidly and reliably transmitted. Further, the radial open groove 42 has a width equal to the diameter of the oil guide hole 41 so that the high pressure fluid is smoothly transferred.
As shown in fig. 1, the dynamic seal assemblies 3 and the pressure transmission channels 4 are two groups, and the two groups of dynamic seal assemblies 3 are arranged along the axial direction of the continuous pipe column. The pressure transmission channel 4 of the upper dynamic seal assembly 3 is communicated with the injection annulus 2, and the pressure transmission channel 4 of the lower dynamic seal assembly 3 is communicated with the bottom hole of the lower well. When the fluid pressure at the upper end of the dynamic seal assembly 3 is high, the upper dynamic seal assembly 3 plays a main sealing role; the fluid pressure at the lower end of the dynamic seal assembly 3 is high, so that the dynamic seal assembly 3 at the lower part plays a main sealing role, bidirectional follow-up control of contact pressure on a sealing surface of the continuous pipe column is realized, the dynamic seal of the continuous pipe column is ensured, meanwhile, the sliding is realized, and the sealing capacity is improved.
Further, the outer string 1 includes an upper joint 11, a lower joint 12, and a dynamic seal joint 13, the upper joint 11 and the lower joint 12 are respectively connected to the outer tubing string, and the dynamic seal joint 13 is connected between the upper joint 11 and the lower joint 12. In this embodiment, the two sets of dynamic seal assemblies 3 are respectively axially limited between the dynamic seal joint 13 and the upper joint 11, and between the dynamic seal joint 13 and the lower joint 12, which is convenient to install and has high reliability.
Still further, the high-pressure water jet conveying device further comprises two sets of centralizers 6, and the two sets of centralizers 6 are respectively positioned at two ends of the dynamic seal assembly 3 so as to centralize the continuous pipe column. The upper joint 11 and the lower joint 12 each include an upper mounting section 14 and a lower mounting section 15 connected to each other; the two sets of centralizers 6 are respectively arranged on the upper joint 11 and the lower joint 12, and the centralizers 6 are limited between the upper mounting section 14 and the lower mounting section 15, so that the centralizers are convenient to install and high in reliability.
In this embodiment, the annular pressurizing grooves 43 are all 60 ° in angle, and act on the middle part of the arc-shaped section 321 of the compression ring 32, so that the compression rings 32 are uniformly stressed, and the sealing effect of the injection annulus 2 is ensured. In other embodiments, the angle of the annular pressure groove 43 may be adjusted depending on the area of flow through required for sealing.
The operation process of the high-pressure water jet conveying device comprises the following steps: (1) Grouping an oil pipe column of an oil pipe, a dynamic seal, an oil pipe anchor, a directional nipple and a steering gear to a preset position; (2) calibrating the depth and orienting the gyroscope; (3) A tubing string, a christmas tree and a continuous string wellhead device; (4) running the continuous string into the well to a predetermined position; (5) Pumping high-pressure water jet into the injection annulus 2, and then spraying the high-pressure water jet from a nozzle of the continuous pipe column to cut rock and break rock drilling; (6) After the sprayer communicates with the reservoir body, a continuous pipe column is provided, and a communication channel between the shaft and the reservoir body is established.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (9)
1. The high-pressure water jet conveying device is characterized by comprising a continuous pipe column, an external pipe column, a dynamic sealing assembly and a pressure transmission channel, wherein the external pipe column is enclosed with the continuous pipe column to form a high-pressure water jet injection annulus, the dynamic sealing assembly is used for sealing the injection annulus, the pressure transmission channel is used for providing sealing pressure for the dynamic sealing assembly, and the pressure transmission channel is communicated with the dynamic sealing assembly and is arranged on the external pipe column; the dynamic seal assembly radially contracts and tightly holds the continuous pipe column when fluid is injected into the pressure transmission channel; the continuous pipe column is provided with a through hole for communicating the injection annulus with the inside of the continuous pipe column,
The dynamic seal assembly comprises a pressure transmission sleeve, a compression ring and an annular seal ring which are sequentially sleeved from outside to inside, wherein the pressure transmission channel wraps the pressure transmission sleeve; the compression ring comprises a plurality of arc-shaped sections which are arranged at intervals along the circumferential direction of the pressure transmission sleeve, and deformation gaps which provide radial deformation space of the compression ring are reserved among the arc-shaped sections; and the annular sealing ring is in sealing fit with the continuous pipe column under the radial acting force of the compression ring.
2. The high-pressure water jet conveying device according to claim 1, wherein two symmetrically arranged sealing teeth are arranged on the inner side of the annular sealing ring, the inner side angles of the two sealing teeth are enclosed to form a storage space for storing oil liquid and sediment, and the outer side angles of the sealing teeth are angles which ensure that the sealing ring has sealing and lubricating functions.
3. The high-pressure water jet conveying device according to claim 1, wherein a plurality of annular sealing rings are arranged along the axial direction of the pressure transmission sleeve, adjacent annular sealing rings are separated by a middle ring, and support rings are arranged on the outer sides of the annular sealing rings at two ends; the number of the compression rings is the same as that of the annular sealing rings, and the compression rings are arranged in one-to-one correspondence with the annular sealing rings.
4. A high pressure water jet delivery device as claimed in claim 3 wherein arcuate segments of adjacent compression rings are staggered.
5. The high-pressure water jet transport device according to claim 3, wherein both end portions of the pressure transmission sleeve are pressed between the support ring and the outer pipe string, and sealing members for preventing fluid leakage are provided at both sides of the pressing position of the pressure transmission sleeve.
6. The high pressure water jet delivery device according to any one of claims 1 to 5, wherein the pressure transmission channels are arranged in a plurality of groups, and the plurality of groups of pressure transmission channels are arranged at intervals along the circumferential direction of the dynamic seal assembly; each group of pressure transmission channels comprises an oil guide hole, a radial opening groove and an annular pressurizing groove which are sequentially communicated, and the annular pressurizing groove wraps the dynamic sealing assembly.
7. The high pressure water jet delivery device according to any one of claims 1 to 5, wherein the dynamic seal assemblies and pressure transfer passages are two groups, the dynamic seal assemblies are arranged along the axial direction of the continuous pipe column, the pressure transfer passage of the upper dynamic seal assembly is communicated with the injection annulus, and the pressure transfer passage of the lower dynamic seal assembly is communicated with the bottom hole of the lower part.
8. The high pressure water jet delivery device of claim 7, wherein the outer tubular string comprises an upper joint, a lower joint, and a dynamic seal joint connected between the upper joint and the lower joint, the two sets of dynamic seal assemblies being axially confined between the dynamic seal joint and the upper joint, and between the dynamic seal joint and the lower joint, respectively.
9. The high pressure water jet delivery device of claim 8, further comprising two sets of centralizers that centralize the coiled tubing string; the upper joint and the lower joint comprise an upper mounting section and a lower mounting section which are mutually connected; the two sets of centralizers are respectively arranged on the upper joint and the lower joint and are limited between the upper mounting section and the lower mounting section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135172.1A CN114458156B (en) | 2020-10-21 | 2020-10-21 | A high pressure water jet conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135172.1A CN114458156B (en) | 2020-10-21 | 2020-10-21 | A high pressure water jet conveying device |
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| Publication Number | Publication Date |
|---|---|
| CN114458156A CN114458156A (en) | 2022-05-10 |
| CN114458156B true CN114458156B (en) | 2024-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011135172.1A Active CN114458156B (en) | 2020-10-21 | 2020-10-21 | A high pressure water jet conveying device |
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| CN (1) | CN114458156B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984214A (en) * | 2010-12-14 | 2011-03-09 | 西安福安创意咨询有限责任公司 | Compensating annular blowout preventer |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1174589A (en) * | 1982-01-07 | 1984-09-18 | William L. Abernathy | Method and apparatus for injecting fluid into a well |
| US4646845A (en) * | 1984-08-14 | 1987-03-03 | Cactus Wellhead Equipment Co., Inc. | Metal seal for wellhead apparatus |
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