CN114458156A - High-pressure water jet conveying device - Google Patents
High-pressure water jet conveying device Download PDFInfo
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- CN114458156A CN114458156A CN202011135172.1A CN202011135172A CN114458156A CN 114458156 A CN114458156 A CN 114458156A CN 202011135172 A CN202011135172 A CN 202011135172A CN 114458156 A CN114458156 A CN 114458156A
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- pipe column
- dynamic seal
- pressure
- water jet
- pressure water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000002347 injection Methods 0.000 claims abstract description 34
- 239000007924 injection Substances 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 238000002018 water-jet injection Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 96
- 230000006835 compression Effects 0.000 claims description 36
- 238000007906 compression Methods 0.000 claims description 36
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 15
- 238000005553 drilling Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 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
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects 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
- 239000000463 material Substances 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
- 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
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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 outer pipe column, a dynamic seal assembly and a pressure transfer channel, wherein the outer pipe column and the continuous pipe column are enclosed to form a high-pressure water jet injection annulus; the dynamic seal assembly radially shrinks to hold the continuous pipe column when the pressure transmission channel injects fluid; and the continuous pipe column is provided with a through hole for communicating the injection annulus with the interior of the continuous pipe column. The hydraulic rock breaking device has the advantages of reducing hydraulic loss, improving rock breaking efficiency, being simple and compact in structure and the like.
Description
Technical Field
The invention relates to the field of rock breaking in petroleum and natural gas drilling, in particular to a high-pressure water jet conveying device.
Background
A large number of cracks exist around the existing carbonate reservoir near a well bore, all-round communication needs to be achieved through a radial hydraulic jet drilling well completion technology, and the reserve utilization degree is greatly improved. The existing high-pressure water jet conveying mode is to inject high-speed fluid into a continuous pipe column and break rock through a nozzle at the end of the continuous pipe column so as to realize rock breaking and drilling. Because the diameter of the continuous pipe column is small, the friction resistance of the conveying mode is large, the hydraulic loss along the way is large, under the condition of certain total hydraulic power, the sprayed hydraulic power is insufficient, the rock breaking efficiency is influenced, and the stratum buried deeply in a reservoir stratum is more obvious; and the mode of achieving the rock breaking efficiency by improving the total hydraulic power has high cost and poor economical efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide 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:
a high-pressure water jet conveying device comprises a continuous pipe column, an outer pipe column, a dynamic seal assembly and a pressure transfer channel, wherein the outer pipe column and the continuous pipe column are enclosed to form a high-pressure water jet injection annular space, the dynamic seal assembly seals the injection annular space, and the pressure transfer channel provides sealing pressure for the dynamic seal assembly; the dynamic seal assembly radially shrinks to hold the continuous pipe column when the pressure transmission channel injects fluid; and the continuous pipe column is provided with a through hole for communicating the injection annulus with the interior of the continuous pipe column.
As a further improvement of the above technical solution:
the dynamic seal assembly comprises a pressure transmission sleeve, a compression ring and an annular sealing 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 sections which are arranged at intervals along the circumferential direction of the pressure transmission sleeve, and deformation gaps for providing radial deformation spaces of the compression ring are reserved among the arc sections; the annular sealing ring is in sealing fit with the coiled tubing string under the radial acting force of the compression ring.
The inboard of annular space sealing washer is equipped with the sealed tooth of two symmetrical arrangement, two the interior side angle of sealed tooth encloses to close and forms the storage space who stores fluid and silt, the outside angle of sealed tooth is the angle of guaranteeing that the sealing washer has simultaneously sealed and lubricating function to select for the standard.
The 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 supporting 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.
The arc-shaped sections of adjacent compression rings are staggered.
Two ends of the pressure transmission sleeve are tightly pressed between the support ring and the external pipe column, and sealing parts for preventing fluid leakage are arranged on two sides of the pressing position of the pressure transmission sleeve.
The pressure transmission channels are arranged in multiple groups at intervals along the circumferential direction of the dynamic seal assembly; each group of pressure transmission channels comprises oil guide holes, radial open grooves and annular pressurizing grooves which are sequentially communicated, and the dynamic sealing assembly is wrapped by the annular pressurizing grooves.
The dynamic seal assemblies and the pressure transfer channels are two groups, the two groups of dynamic seal assemblies are arranged along the axial direction of the continuous pipe column, the pressure transfer channel positioned on the upper dynamic seal assembly is communicated with the injection annulus, and the pressure transfer channel positioned on the lower dynamic seal assembly is communicated with the bottom of the lower well.
The outer 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 dynamic seal assemblies are respectively 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 column; the upper joint and the lower joint respectively comprise an upper mounting section and a lower mounting section which are connected with each other; 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 pipe column and the continuous pipe column are arranged to enclose to form an injection annulus of high-pressure water jet, the dynamic sealing assembly is arranged to seal the injection annulus, and the pressure transfer channel is arranged to provide sealing pressure for the dynamic sealing assembly. The injection device has the advantages that high-pressure water jet is injected from the injection annulus of the external pipe column and the continuous pipe column, the injection mode of the existing continuous pipe column is changed, the injection space is increased, the on-way resistance loss for conveying hydraulic friction and hydrodynamic force is reduced, the hydrodynamic force of the nozzle is increased, the problem of large hydraulic loss of the continuous pipe column is solved, and the rock breaking efficiency is improved.
Meanwhile, the dynamic seal assembly shrinks and holds the continuous pipe column tightly to seal the injection annulus when the pressure transfer channel injects fluid, and the continuous pipe column is provided with a through hole, so that high-pressure water jet is guided into the continuous pipe column from the through hole after reaching the annular injection sealing position, and the purpose of spraying the high-pressure water jet from the end part of the continuous pipe column is achieved. Therefore, the invention creatively changes the existing injection mode of high-pressure fluid, and greatly improves the rock breaking efficiency; 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 external pipe column is simple and compact in overall structure, small in occupied space and 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 diagram of a rock breaking drilling fluid conveying device.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Fig. 3 is a 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 view of the annular sealing ring in positional relationship to the compression ring.
Fig. 6 is a top view of fig. 5.
The reference numerals in the figures 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 the annular space; 3. a dynamic seal assembly; 31. a pressure transmission sleeve; 32. a compression ring; 321. an arc-shaped section; 322. a deformation gap; 33. an annular sealing ring; 331. a seal tooth; 332. the medial angle; 333. an outboard corner; 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 pressurized groove; 5. a sealing member; 6. a centralizer.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the invention.
As shown in FIG. 1, the high-pressure water jet delivery device of the embodiment comprises a continuous pipe column, an outer pipe column 1, a dynamic seal assembly 3 and a pressure transmission channel 4. Wherein, the external pipe column 1 is sleeved outside the continuous pipe column to form an injection annulus 2 of high-pressure water jet; the pressure transfer channel 4 and the dynamic seal assembly 3 are both arranged on the external pipe column 1, and the pressure transfer 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 shrinks and holds the continuous pipe column when the pressure transfer channel 4 injects fluid so as to seal the injection annulus 2; the coiled tubing string is provided with a through hole to communicate the injection annulus 2 with the interior of the coiled tubing string.
The arrangement form of the invention enables the high-pressure water jet to be injected from the external pipe column 1 and the injection annulus 2 of the continuous pipe column, changes the injection mode of the existing continuous pipe column, increases the injection space, reduces the on-way resistance loss of conveying hydraulic friction and 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 shrinks and holds the continuous pipe column tightly to seal the injection annulus 2 when the pressure transfer channel 4 injects fluid, and the continuous pipe column is provided with a through hole, so that high-pressure water jet is guided 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 creatively changes the existing injection mode of high-pressure fluid, 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 external pipe column is simple and compact in overall structure, small in occupied space and low in cost.
In this embodiment, the working principle of the high-pressure water jet conveying device is as follows: after the coiled tubing string is run into the well, high-speed fluid is pumped in, the high-speed fluid travels from the injection annulus 2 of the coiled tubing string and the outer tubing string 1 to the bottom of the well, and when the dynamic seal assembly 3 is met, the high-speed fluid is blocked and can only enter the coiled tubing string from the injection annulus 2 through the through hole of the coiled tubing string. When fluid is injected at a high speed, the continuous pipe column is placed at a certain speed, the continuous pipe column penetrates through the dynamic seal assembly 3 in a sliding mode, at the moment, the dynamic seal assembly 3 still has certain sealing capacity, the situation that the fluid completely enters the stratum through the through holes is guaranteed, 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 transmitting sleeve 31, a compression ring 32 and an annular sealing ring 33 which are sleeved from outside to inside in sequence. Wherein the pressure transmitting sleeve 31 effectively isolates high pressure fluid and transmits pressure to the compression ring 32 to provide radial movement force of the dynamic seal assembly 3; the pressure transfer channel 4 encloses the pressure transfer sleeve 31 such that high pressure fluid acts on the pressure transfer sleeve 31 through the pressure transfer channel 4.
Meanwhile, as shown in fig. 6, the compression ring 32 includes a plurality of arc-shaped segments 321. The arc-shaped sections 321 are arranged at intervals along the circumferential direction of the pressure transmission sleeve 31, deformation gaps 322 are reserved among the arc-shaped sections 321, and the deformation gaps 322 provide spaces for radial deformation of the compression ring 32, so that the annular sealing ring 33 is in sealing fit with the coiled tubing string under the radial acting force of the compression ring 32. The dynamic seal assembly 3 can control the contact pressure with the sealing surface of the continuous pipe column through the radial distance, thereby realizing follow-up control and playing a role in annular sealing injection.
As shown in fig. 5, two sealing teeth 331 are symmetrically arranged on the inner side of the annular sealing ring 33, so that the coiled tubing string can perform dynamic sealing in two directions when the coiled tubing string is lifted up and lowered down, and reciprocating sealing of the coiled tubing string is realized. The inner corners 332 of the two seal teeth 331 enclose to form a storage space for storing oil and silt; the outer side angle 333 of the seal tooth 331 is an angle which ensures that the seal ring has the functions of sealing and lubricating as standard selection, so that a dynamic pressure oil film can be formed when the continuous string passes through, the dynamic seal assembly 3 can bear high pressure in a sliding state, and dynamic sealing of the continuous string in the well bottom sliding process is realized.
In this embodiment, the outboard angle 333 of the seal tooth 331 is greater than the inboard angle 332, the outboard angle 333 is 70 °, and the inboard angle 332 is 20 °. In other embodiments, the angles of the inside and outside angles of the seal teeth 331 may be adjusted as appropriate, so long as slippage of the coiled tubing string and effective sealing of the injection annulus 2 is ensured.
Further, as shown in fig. 6, the number of the arc-shaped sections 321 of the compression ring 32 is four, and the four arc-shaped sections 321 are uniformly distributed along the circumferential direction of the pressure transmission sleeve 31, so that the acting force is uniformly applied to the annular sealing ring 33, the circumferential contact pressure generated on the sealing surface of the coiled tubing string is uniform, the occurrence of local leakage is avoided, and the sealing reliability is ensured. When the compression ring 32 is subjected to 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.
Furthermore, the two ends of the arc-shaped section 321 are rounded to avoid the end of the arc-shaped section 321 from damaging the pressure sleeve 31 and the annular sealing ring 33 when the gap between the adjacent arc-shaped sections 321 changes, so that 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-shaped sections 321 is 88 to 89 ° so that a certain deformation gap 322 is formed between the arc-shaped sections 321. In other embodiments, the angle of the arc-shaped segment 321 can be adjusted according to actual conditions as long as effective sealing of the injection annulus 2 can be ensured.
As shown in fig. 4, four annular sealing rings 33 are provided, 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 the outer sides of the annular sealing rings 33 at two ends are provided with support rings 35; the number of the compression rings 32 is the same as that of the annular sealing rings 33, and the compression rings 32 and the annular sealing rings 33 are arranged in one-to-one correspondence. In other embodiments, the number of annular seals 33 may be set based on the roughness and finish of the coiled tubing string, and the material of the dynamic seal assembly 3, so long as effective sealing of the injection annulus 2 is ensured.
According to the invention, the dynamic sealing performance is improved in the form of combining the annular sealing rings 33 and the compression rings 32, and meanwhile, when part of the compression rings 32 and the annular sealing rings 33 are invalid, 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 arc segments 321 of adjacent compression rings 32 are staggered by a certain angle, so that the circumferential contact pressure generated on the sealing surface of the coiled tubing string is uniform, and the effective sealing of the injection annulus 2 is further ensured. In this embodiment, the offset angle of the arc segments 321 of adjacent compression rings 32 is 45 °, and in other embodiments, the offset angle can be adjusted according to actual conditions.
Furthermore, the thickness of the annular sealing ring 33 is larger than that of the compression ring 32, so as to increase the sealing area between the annular sealing ring 33 and the intermediate ring 34 and the support ring 35 and reduce the leakage phenomenon of high-pressure water jet from the end face of the annular sealing ring 33. In this embodiment, the pressure transmission sleeve 31 and the annular sealing ring 33 which are in contact with the fluid are made of polytetrafluoroethylene which is high temperature resistant and has an extremely low friction coefficient.
As shown in fig. 2, both end portions of the pressure transmitting sleeve 31 are pressed between the support ring 35 and the outer pipe 1, and sealing members 5 are provided on both sides of the pressing position of the pressure transmitting sleeve 31 to prevent fluid leakage. In this embodiment, two sealing members 5 are respectively disposed on two sides of the pressing position of the pressure transmitting sleeve 31 to improve the sealing performance; the sealing component 5 is an O-shaped sealing ring, and the O-shaped sealing ring is made of fluororubber, hydrogenated nitrile butadiene rubber or polyurethane.
As shown in fig. 3, the pressure transfer channels 4 are four groups, the four groups of pressure transfer channels 4 are uniformly arranged along the circumferential direction of the dynamic seal assembly 3, and the four groups of pressure transfer 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 can be adjusted according to the flow area required for the actual seal.
In this embodiment, each group of pressure transmission passages 4 includes an oil guide hole 41, a radial opening groove 42, and an annular pressurizing groove 43. Wherein, lead oilhole 41, radial open slot 42 and annular pressurized groove 43 and communicate in proper order, and annular pressurized groove 43 wraps up dynamic seal assembly 3. The high-pressure fluid acts on the pressure-transmitting sleeve 31 through the oil guide hole 41, the radial opening groove 42 and the annular pressurizing groove 43, which realizes rapid and reliable transmission of the high-pressure fluid. Further, the width of the radial opening groove 42 is equal to the diameter of the oil guide hole 41, so that the high-pressure fluid is smoothly delivered.
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 transfer passage 4 of the upper dynamic seal assembly 3 is communicated with the injection annulus 2, and the pressure transfer passage 4 of the lower dynamic seal assembly 3 is communicated with the bottom of the well. When the fluid pressure at the upper end of the dynamic seal assembly 3 is high, the dynamic seal assembly 3 at the upper part plays a main sealing role; the fluid pressure at the lower end of the dynamic seal assembly 3 is high, the dynamic seal assembly 3 at the lower part plays a main sealing role, the bidirectional follow-up control of the contact pressure on the sealing surface of the continuous pipe column is realized, the sliding of the continuous pipe column during dynamic sealing is ensured, and the sealing capacity is improved.
Further, the outer pipe column 1 comprises 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 with the outer pipe column, 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 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 respectively, and the installation is convenient and the reliability is high.
Furthermore, the high-pressure water jet conveying device also comprises two groups of centralizers 6, and the two groups of centralizers 6 are respectively positioned at two ends of the dynamic seal assembly 3 so as to centralize the continuous tubular 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; two sets of centralizers 6 are respectively installed on the upper joint 11 and the lower joint 12, and the centralizers 6 are limited between the upper installation section 14 and the lower installation section 15, so that the installation is convenient and the reliability is high.
In this embodiment, the angles of the annular pressurizing grooves 43 are all 60 °, and the annular pressurizing grooves act on the middle 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 pressurized groove 43 may be adjusted according to the flow area required for sealing.
The operation process of the high-pressure water jet conveying device comprises the following steps: (1) assembling oil pipe columns of an oil pipe, a dynamic seal, an oil pipe anchor, a directional short circuit and a steering gear to preset positions; (2) calibrating the depth and orienting the gyroscope; (3) setting a tubing hanger, installing a Christmas tree and installing a continuous tubular column wellhead device; (4) the continuous pipe column is put into a well to a preset position; (5) pumping high-pressure water jet to the injection annulus 2, and then spraying the high-pressure water jet from a nozzle of the continuous pipe column to cut rocks and break the rocks for drilling; (6) after the spray head is communicated 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 embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A high-pressure water jet conveying device is characterized by comprising a continuous pipe column, an outer pipe column, a dynamic seal assembly and a pressure transfer channel, wherein the outer pipe column and the continuous pipe column are enclosed to form a high-pressure water jet injection annulus; the dynamic seal assembly radially shrinks to hold the continuous pipe column when the pressure transmission channel injects fluid; and the continuous pipe column is provided with a through hole for communicating the injection annulus with the interior of the continuous pipe column.
2. The high-pressure water jet delivery device according to claim 1, wherein the dynamic seal assembly comprises a pressure transfer sleeve, a compression ring and an annular sealing ring which are sequentially sleeved from outside to inside, wherein the pressure transfer channel wraps the pressure transfer sleeve; the compression ring comprises a plurality of arc sections which are arranged at intervals along the circumferential direction of the pressure transmission sleeve, and deformation gaps for providing radial deformation spaces of the compression ring are reserved among the arc sections; the annular sealing ring is in sealing fit with the coiled tubing string under the radial acting force of the compression ring.
3. The high-pressure water jet delivery device according to claim 2, wherein two symmetrically arranged sealing teeth are arranged on the inner side of the annular sealing ring, the inner corners of the two sealing teeth enclose a storage space for storing oil and silt, and the outer corners of the sealing teeth are selected as standards to ensure that the sealing ring has both sealing and lubricating functions.
4. The high-pressure water jet delivery device according to claim 2, wherein the number of the annular sealing rings is multiple, the annular sealing rings are arranged along the axial direction of the pressure transfer sleeve, adjacent annular sealing rings are separated by an intermediate ring, and support rings are arranged outside 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.
5. The high pressure water jet delivery device of claim 4, wherein the arcuate segments of adjacent compression rings are staggered.
6. The high pressure water jet delivery device of claim 4, wherein both ends of the pressure transfer sleeve are compressed between the support ring and the outer tubular string, and sealing members for preventing fluid leakage are provided on both sides of the compression position of the pressure transfer sleeve.
7. The high-pressure water jet delivery device according to any one of claims 1 to 6, wherein the pressure transfer channels are in multiple groups, and the multiple groups of pressure transfer channels are arranged at intervals along the circumferential direction of the dynamic seal assembly; each group of pressure transmission channels comprises oil guide holes, radial open grooves and annular pressurizing grooves which are sequentially communicated, and the dynamic sealing assembly is wrapped by the annular pressurizing grooves.
8. The high pressure water jet delivery device of any one of claims 1 to 6, wherein the dynamic seal assemblies and the pressure transfer channels are provided in two sets, the two sets of dynamic seal assemblies are arranged along the axial direction of the coiled tubing string, the pressure transfer channel provided at the upper dynamic seal assembly is communicated with the injection annulus, and the pressure transfer channel provided at the lower dynamic seal assembly is communicated with the bottom hole of the lower well.
9. The high pressure water jet delivery device of claim 8, wherein the outer tubing string comprises an upper fitting, a lower fitting, and dynamic seal fittings connected between the upper fitting and the lower fitting, and wherein two sets of dynamic seal assemblies are axially restrained between the dynamic seal fittings and the upper fitting and between the dynamic seal fittings and the lower fitting, respectively.
10. The high pressure water jet delivery device of claim 9, further comprising two sets of centralizers that centralize the coiled tubing string; the upper joint and the lower joint respectively comprise an upper mounting section and a lower mounting section which are connected with each other; 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135172.1A CN114458156A (en) | 2020-10-21 | 2020-10-21 | High-pressure water jet conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135172.1A CN114458156A (en) | 2020-10-21 | 2020-10-21 | High-pressure water jet conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114458156A true CN114458156A (en) | 2022-05-10 |
Family
ID=81404099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011135172.1A Pending CN114458156A (en) | 2020-10-21 | 2020-10-21 | High-pressure water jet conveying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114458156A (en) |
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2020
- 2020-10-21 CN CN202011135172.1A patent/CN114458156A/en active Pending
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