CN111636922A - Jet impact crushing device and cavity bottom insoluble substance crushing and cleaning method - Google Patents
Jet impact crushing device and cavity bottom insoluble substance crushing and cleaning method Download PDFInfo
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- 238000012360 testing method Methods 0.000 claims description 27
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- 239000012267 brine Substances 0.000 claims description 15
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 15
- 239000012634 fragment Substances 0.000 claims description 14
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- 238000013467 fragmentation Methods 0.000 claims description 3
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- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
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- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 claims 1
- 239000007789 gas Substances 0.000 description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 22
- 150000003839 salts Chemical class 0.000 description 19
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- GYZGFUUDAQXRBT-UHFFFAOYSA-J calcium;disodium;disulfate Chemical compound [Na+].[Na+].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GYZGFUUDAQXRBT-UHFFFAOYSA-J 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The invention discloses a jet impact crushing device and a method for crushing and cleaning insoluble substances at the bottom of a cavity, wherein the jet impact crushing device comprises: the continuous oil pipe, the hydraulic safety joint and the spray head are sequentially connected in series, and the continuous oil pipe is a hollow flexible pipe; one end of the hydraulic safety joint is communicated with the coiled tubing, the other end of the hydraulic safety joint is communicated with the spray head, and a ball throwing seat matched with a ball is formed inside the hydraulic safety joint; a main runner communicated with the hydraulic safety joint and at least one nozzle communicated with the main runner are formed inside the spray head, and the outer contour diameter of the spray head is larger than the outer diameter of the continuous oil pipe; the coiled tubing, the hydraulic safety joint and the spray head form a hollow cleaning flow channel, after cleaning liquid with preset pressure is injected into the coiled tubing, the cleaning liquid is sprayed out through the spray nozzle to form high-pressure jet flow, and the spray head moves irregularly under the action of jet flow reverse thrust. The invention can enlarge the cleaning range of the insoluble substances and improve the cleaning efficiency of the insoluble substances.
Description
Technical Field
The invention relates to the technical field of oil and natural gas exploitation, in particular to a jet impact crushing device and a method for crushing and cleaning insoluble substances at the bottom of a cavity.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
With the development of urbanization in China and the large-scale construction of infrastructure related to natural gas, the consumption of the natural gas is rapidly increased, and meanwhile, seasonal fluctuation of natural gas demand brings great challenges to the safety of natural gas supply in China. The salt cavern gas storage is an important type of underground gas storage, and the improvement of the gas storage capacity of the salt cavern gas storage is of great significance to the supply safety of natural gas in China.
The salt layer in China has the characteristics of layered distribution, more argillaceous interlayers, higher content of insoluble impurities and the like, and the average content of insoluble substances is close to 50%. In the process of building the cavity of the salt cavern gas storage, a large amount of insoluble substances are accumulated at the bottom of the salt cavity in the form of residues, the insoluble substances in the residues absorb water and expand, so that the effective space of the salt cavity is further reduced, part of the insoluble substances are wholly collapsed by the interlayer and fall into the bottom of the salt cavity to form residues, and the existence of the residues seriously limits the gas storage capacity of the gas storage.
In order to reduce the occupation of insoluble substances at the bottom of a cavity on effective space, related researchers develop related researches on the treatment and utilization of the insoluble substances at the bottom of the cavity of the salt cavern gas storage and the void volume thereof, and the plum is rich in providing a method for communicating and draining the cavity bottom of the salt cavern gas storage, and the method can completely drain water in the cavity and fully utilize the volume of the gas storage. The Yanghai army invented the coiled tubing string device, can efficiently discharge the brine in the insoluble substance gap, and effectively utilize the insoluble substance gap space. However, the above method cannot achieve effective cleaning of insolubles at the bottom of the chamber.
In order to effectively clean the insoluble substances at the bottom of the cavity, a method for cleaning the insoluble substances by rotating jet flow crushing is also provided. The method can generate a strong cyclone field in the salt cavity to change the fluid state of the fluid in the cavity, strengthen the convection circulation effect and effectively improve the flushing efficiency of the interlayer debris. However, this method has the following drawbacks: firstly, the method is difficult to efficiently impact and break large insoluble substances, and the effective cleaning range of the method needs to be improved due to the limitation of the effective jet distance of the jet flow. Further, under the action of the centrifugal force of the rotating jet flow, the insoluble substances move in the direction away from the return discharge pipe, so that the concentration of the insoluble substances at the return discharge pipe column is reduced, and the cleaning efficiency is reduced along with the reduction.
Therefore, a brand-new device and a method for cleaning the insoluble substances at the bottom of the cavity are urgently needed to be invented, so that the cleaning range of the insoluble substances is expanded, the cleaning efficiency of the insoluble substances is improved, the space utilization rate and the peak regulation capacity of the salt cavern gas storage are improved, and finally the supply safety of natural gas in China is ensured.
Disclosure of Invention
The invention provides a jet impact crushing device and a cavity bottom insoluble substance crushing and cleaning method for overcoming the problems in the prior art, which can enlarge the cleaning range of the insoluble substance and improve the cleaning efficiency of the insoluble substance, thereby improving the space utilization rate and the peak regulation capacity of a salt cavern gas storage and finally ensuring the supply safety of natural gas in China.
The embodiment of the application discloses breaker is strikeed to efflux, and this breaker is strikeed to efflux includes: the continuous oil pipe, the hydraulic safety joint and the spray head are sequentially connected in series from top to bottom, and the continuous oil pipe is a hollow flexible pipe; one end of the hydraulic safety joint is communicated with the continuous oil pipe, the other end of the hydraulic safety joint is communicated with the spray head, and a ball throwing seat matched with a ball is formed inside the hydraulic safety joint; a main runner communicated with the hydraulic safety joint and at least one nozzle communicated with the main runner are formed inside the spray head, and the outer contour diameter of the spray head is larger than the outer diameter of the continuous oil pipe; the coiled tubing, the hydraulic safety joint and the spray head form a hollow cleaning flow channel, after cleaning liquid with preset pressure is injected into the coiled tubing, the cleaning liquid is sprayed out through the spray nozzle to form high-pressure jet flow, and the spray head does irregular movement under the action of jet flow reverse thrust.
In a preferred embodiment, the pressure drop at the nozzle is up to 40Mpa when the high-pressure jet is formed.
In a preferred embodiment, the spray head is a five-nozzle spray head, and the specific hole distribution mode of the five-nozzle spray head is as follows: 2 lateral nozzles, 2 45-degree oblique nozzles and 1 downward nozzle.
In a preferred embodiment, the spray head is a cemented carbide spray head.
In a preferred embodiment, the coiled tubing is coiled tubing with an outer diameter of 50.8mm, the coiled tubing is used for being installed in a halogen discharge string with an outer diameter of 177.8mm, and a debris return-up channel is formed between the coiled tubing and the halogen discharge string.
A method for crushing and cleaning insoluble substances at the bottom of a cavity comprises the following steps:
installing a continuous oil pipe operation machine, ground corollary equipment and pipelines;
installing a wellhead well control device and a coiled tubing, and testing the sealing performance of the wellhead well control device;
a jet impact crushing device formed by a continuous oil pipe, a hydraulic safety joint and a nozzle is put in to crush and clean insoluble substances at the bottom of the cavity;
further lowering the jet impact crushing device for crushing and cleaning;
when the concentration of the fragments in the ground return liquid is lower than a preset value, the jet flow is lifted up to impact the crushing device, and the crushing and cleaning operation is completed.
In a preferred embodiment, the ground support apparatus comprises: after the coiled tubing operation machine, the ground corollary equipment and the pipeline are installed, the method also comprises the following steps: the working roller, the automatic shut-off valve, the oil nozzle manifold, the separator, the liquid storage tank, the brine conveying pump and the brine conveying pipeline are connected, the hydraulic pipeline of the continuous oil pipe operation machine, the insertion pipe, the measured oil pipe calibration counter and the blowout prevention pipe are connected, and a well mouth protection platform is built.
In a preferred embodiment, the installing the wellhead well control device with coiled tubing comprises: dismantling an original well gas production tree cap and an upper flange, sequentially installing a reducing flange, a gate and a continuous oil pipe blowout preventer group, installing a continuous oil pipe blowout preventer, a blowout preventer box and an injection head, and descending a continuous oil pipe to a position below a first half-seal flashboard of the blowout preventer; the test of carrying out well head well control device leakproofness includes: closing the blowout preventer, opening the blowout prevention box, testing the pressure of the coiled tubing working drum at 25 MPa for 30 minutes until the blowout prevention box is qualified, and disconnecting the blowout prevention box from the connection part of the blowout prevention pipe and the blowout preventer after testing the second half-seal gate plate and the shearing gate plate to be qualified, wherein the pressure drop of the blowout prevention box is not more than 0.7 MPa; connecting a hydraulic safety joint and a spray head at the bottom end of the continuous oil pipe, installing a pull disc, testing the tensile force of 150KN, testing the pressure by using clean water at 25 MPa, and judging that the sealed part has no leakage and the pressure drop is not more than 0.7 MPa in 30 minutes to be qualified; disassembling the pull disc, installing a rotary flushing tool, and butting the blowout preventer and the blowout preventer; testing the reducing flange, the gate, the blowout preventer stack, the blowout prevention pipe, the blowout prevention box, the continuous oil pipe, the working roller manifold and the oil nozzle manifold by using clean water under 21 MPa, wherein the pressure drop is not more than 0.7 MPa in 30 minutes, and the pressure is qualified; testing the pressure of the separator and the gas-liquid pipeline at the downstream of the separator by using clear water for 2.5 MPa, and determining that the pressure drop is not more than 0.7 MPa in 30 minutes; and closing the main gate, and testing the pressure of the reducing flange, the blowout preventer stack, the blowout prevention pipe, the blowout prevention box, the continuous oil pipe, the working roller manifold and the oil nozzle manifold under 15 MPa for 30 minutes until the pressure drop is not more than 0.7 MPa.
In a preferred embodiment, in the process of descending the jet impact crushing device, the descending speed is controlled to be less than 6 m/min, the pressure of the bottom probe is less than 5KN, the probe is repeated for 1 to 3 times, and the height is increased by 0 to 0.5 m.
In a preferred embodiment, the insolubles are comprised of gypsum, glauberite, and mudstone.
The invention has the characteristics and advantages that: the jet impact crushing device comprises a continuous oil pipe, a hydraulic safety joint and a spray head which are sequentially connected in series from top to bottom, wherein after the jet impact crushing device is installed, a ground high-pressure pump is started, and cleaning liquid is sprayed out through a nozzle of the spray head to form high-pressure jet. After the high-pressure jet flow is formed, the pressure drop at the nozzle is large (the pressure drop at the nozzle is in direct proportion to the jet flow thrust generated by the nozzle, and the larger the pressure drop at the nozzle is, the larger the jet flow thrust is); in addition, the coiled tubing with certain flexibility and smaller rigidity bends under the action of the reverse thrust, so that the nozzle is driven to move irregularly, the jet direction is changed, and irregular jet is formed. Because the spray head moves irregularly, the reverse thrust at each moment at the spray head is different, so that the bending degrees of the coiled tubing with lower rigidity are different, and the spray head acts on the spray head in turn, so that the spray head collides with insoluble substances at the bottom of the cavity under the action of jet flow reverse thrust.
On the whole, the big piece of undissolved substance of chamber bottom is broken into the piece granule under the dual function of efflux impact and shower nozzle striking, because efflux and coiled tubing's stirring, the unstable flow field of production can improve clastic suspension ability and avoided rotatory fluidic centrifugal force, make tiny undissolved substance suspension in the washing liquid, and flow back to ground through coiled tubing and the annular space of arranging the steamed tubular column, not only guaranteed the cleaning range of undissolved substance and improved the cleaning efficiency of undissolved substance, finally realize the effective washing of the undissolved substance of chamber bottom.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
FIG. 1 is a schematic illustration of a jet impact fragmentation device installed in a brine string provided in an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating the movement of a nozzle in a jet impact breaker apparatus according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a jet impact breaker apparatus for breaking up the contents according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a nozzle head of a jet impact breaker apparatus provided in an embodiment of the present application;
FIG. 5 is a flow chart illustrating the steps of a method for cleaning and breaking insolubles in the chamber bottom according to an embodiment of the present disclosure.
Description of reference numerals:
1. a safety valve; 2. producing a sleeve; 3. discharging a brine pipe column; 4. cementing a cement ring; 5. a permanent packer; 6. releasing the hands; 7. natural gas; 8. brine; 9. insoluble substances; 10. a coiled tubing; 11. a hydraulic safety joint; 12. a spray head; 120. a main flow channel; 121. a nozzle; 1211. a lateral nozzle; 1212. a 45-degree inclined nozzle; 1213. a downward nozzle; 13. crumb particles; 14. a gas injection channel; 15. debris is returned to the channel.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides a jet impact crushing device, and a cavity bottom insoluble substance crushing and cleaning method and system, which can enlarge the cleaning range of insoluble substances and improve the cleaning efficiency of the insoluble substances, so that the space utilization rate and the peak regulation capacity of a salt cavern gas storage are improved, and finally the supply safety of natural gas in China is ensured.
As shown in fig. 1 to fig. 3, the embodiment of the present disclosure provides a jet impact crushing device, specifically a tubular column device for crushing and discharging insoluble substances at the bottom of a salt cavern gas storage cavity. The jet impact fragmentation device may comprise: the continuous oil pipe 10, the hydraulic safety joint 11 and the spray head 12 are sequentially connected in series from top to bottom.
In the present embodiment, the coiled tubing 10 is a hollow flexible tube. One end of the hydraulic safety joint 11 is communicated with the coiled tubing 10, the other end of the hydraulic safety joint is communicated with the spray head 12, and a ball throwing seat matched with a ball is formed inside the hydraulic safety joint 11. A main flow passage 120 communicated with the hydraulic safety joint 11 and at least one nozzle 121 communicated with the main flow passage 120 are formed inside the spray head 12, and the outer contour diameter of the spray head 12 is larger than the outer diameter of the coiled tubing 10. The coiled tubing 10, the hydraulic safety joint 11 and the nozzle 12 form a hollow cleaning flow channel, after cleaning liquid with preset pressure is injected into the coiled tubing 10, the cleaning liquid is sprayed out through the nozzle 121 to form high-pressure jet flow, and the nozzle 12 moves irregularly under the action of jet flow reverse thrust.
When the jet impact crushing device is used, after the jet impact crushing device is installed, the ground high-pressure pump is started, and the cleaning liquid is sprayed out through the nozzle 121 of the spray head 12 to form high-pressure jet. When a high pressure jet is formed, the pressure drop at the nozzle 121 is large. Specifically, the pressure drop at the nozzle 121 may be up to 40 MPa. The pressure drop across the nozzle 121 is proportional to the jet thrust generated by the nozzle 121, and the greater the pressure drop across the nozzle 121, the greater the jet thrust generated. In addition, because the coiled tubing 10 has a certain flexibility and a small rigidity, the coiled tubing 10 bends under the action of the reverse thrust, and further drives the nozzle 12 to move (the nozzle 12 mainly swings left and right irregularly), so that the jet direction is changed. Because the nozzle 12 is moving at all times and the amount of reverse thrust at the nozzle 12 varies from time to time, the coiled tubing 10 will flex differently. Because the coiled tubing 10 is less rigid than conventional tubing, the nozzle 12 can move irregularly at high speeds under the thrust of the jet. And finally, crushing the large insoluble substances 9 at the cavity bottom into fragment particles 13 under the dual action of jet impact and spray head 12 impact, and enabling the fragment particles and the fine insoluble substances 9 to be suspended in the cleaning solution and to be returned to the ground through the annular space between the continuous oil pipe 10 and the brine discharge pipe column 3, so that the insoluble substances 9 at the cavity bottom can be effectively cleaned.
The specific principle analysis that the jet impact crushing device can expand the cleaning range of the insoluble substances 9 and improve the cleaning efficiency of the insoluble substances 9 is as follows:
firstly, due to the flexibility of the continuous oil pipe 10, the continuous oil pipe 10 can be bent under the action of the reverse thrust of the spray head 12, so that the spray head 12 is driven to move (irregular movement mainly swinging left and right), and the spray head 12 impacts the large insoluble substances 9 at the bottom of the cavity to realize crushing during movement. When the jet flow impacts, the spray head 12 can generate irregular movement under the bending action of the continuous oil pipe 10, and because the spray head 12 moves at every moment, the reverse thrust at every moment is different, the bending degree of the continuous oil pipe 10 is also different, and the force acting on the spray head 12 is different in size and direction, the spray head 12 can randomly move mainly by swinging. The spray head 12 moves and simultaneously the spray head 12 impacts the large insoluble substances 9 at the bottom of the cavity to realize crushing.
Secondly, due to the irregular movement of the spray head 12, the corresponding spraying directions of the high-pressure jet flow at each moment are different, and the irregular movement of the spray head 12 causes the spraying direction of the high-pressure jet flow to be changed continuously, so that an unstable flow field is formed, and the capability of the cleaning liquid for suspending the insoluble substances 9 at the bottom of the cavity is improved.
Third, the spray head 12 of the present application makes irregular motion, forms an unstable flow field and increases the concentration of debris at the flowback string, relative to the centrifugal motion of debris during the cleaning process with the fixed rotary spray head 12.
It should be noted that: the rotating high pressure jet previously created by the stationary rotary nozzle 12 creates a rotating flow field around the nozzle 12 and the suspended debris is forced by centrifugal forces during the rotation process to move away from the nozzle 12, resulting in a significantly lower concentration of debris near the bit than at the bit far away. And the irregular motion shower nozzle 12 that this application adopted has produced irregular flow field, and the detritus suspends under the turbulent flow field, and even distribution is in the flow field, and compared, the technical scheme that this application provided has had great improvement at the detritus concentration of reverse drainage tubular column department, and then has improved the cleaning efficiency of chamber bottom insoluble substance 9.
Fourth, the traditional oil pipe is rigid and cannot be completely acted by the reverse thrust, so that the spray head 12 connected by the traditional oil pipe has a fixed jet flow spraying direction and a limited action range. According to the technical scheme, the flexible coiled tubing 10 is adopted, the coiled tubing 10 bends under the action of jet reverse thrust, the spray head 12 is driven to move irregularly, the jet flow spraying direction is changed continuously, and the effective action range of jet flow impact crushing is greatly enlarged compared with the spray head 12 connected with the traditional oil tube.
The jet impact crushing device provided in the embodiment is applied to a salt cavern gas storage. For a production casing 2 with a salt cavern gas reservoir well bore configuration of typically 244.5mm, a 177.8mm brine discharge string 3 is lowered into the production casing 2. The production casing 2 is provided with a cement cemented annulus 4 at its periphery. A safety valve 1 is arranged at the upper end close to the production casing 2, a permanent packer 5 is arranged in the middle of the production casing 2, and a release 6 is arranged at the bottom close to the salt cavern gas storage.
A gas injection channel 14 is formed in the annulus formed between the production casing 2 and the halogen discharge column 3. The jet impact crushing device provided in the embodiment of the application is lowered through the brine discharge pipe column 3 by using the coiled tubing 10 of the jet impact crushing device. In order to provide sufficient debris return space in the annulus between the coiled tubing 10 and the brine discharge string 3, i.e. to form a debris uptake 15 of sufficient size, a 50.8mm coiled tubing 10 may be used.
When the device is used, the displacing gas is injected into the gas injection channel 14 through the ground, so that brine 8 in the bottom of the salt cavern gas storage cavity is mixed with the fragment particles 13 crushed by the jet impact crushing device and then returns out from the fragment upward channel 15. Specifically, the performance parameters of the coiled tubing 10 can be referred to in table 1.
TABLE 1 coiled tubing Performance parameters
During the crushing and cleaning, the spray head 12 moves irregularly, and the outer diameter (for example, 70mm) of the spray head 12 is not equal to the outer diameter (for example, 50.8mm) of the coiled tubing 10. The nozzle 12 has an outer diameter larger than that of the coiled tubing 10 and is easily caught during cleaning. When the spray head 12 cannot be unlocked, a ball can be thrown and pressed from the coiled tubing 10, tools at the lower part of the hydraulic safety joint 11 are abandoned, and the coiled tubing 10 is lifted up to lift the part above the hydraulic safety joint 11.
Referring to fig. 4, in the present embodiment, the spray head 12 may include a body, and the upper end of the body is connected to the hydraulic safety joint 11. A main flow passage 120 communicating with the hydraulic relief joint 11 and a plurality of nozzles 121 communicating with the main flow passage 120 are formed inside the body.
Specifically, the spray head 12 may be a five-nozzle 121 spray head 12. The five-nozzle 121 head 12 may be specifically arranged in such a manner that the number of the lateral nozzles 1211, the number of the 45 ° oblique nozzles 1212 and the number of the downward nozzles 1213 may be 2. Of course, the specific structure of the head 12 is not limited to the five-nozzle 121 head 12, and the specific number of the nozzles 121, the arrangement position of the nozzles 121, and the like may be adjusted adaptively, and the present application is not limited thereto.
In the crushing cleaning, the spray head 12 is required to hit the large pieces of debris, so that a certain requirement is imposed on the strength of the spray head 12. Specifically, the material of the nozzle 12 may be cemented carbide. Of course, the material of the nozzle 12 may also be selected from other materials with better strength and wear resistance, and the application is not limited in this respect.
In the present embodiment, the performance parameters of the cemented carbide nozzle 12 are shown in table 2.
TABLE 2 spray head Performance parameters
During crushing and cleaning, the spray head 12 irregularly moves at a high speed, so that on one hand, the insoluble substances 9 at the bottom of the crushing cavity are assisted; on the other hand, an unstable flow field can be formed, the capability of the cleaning liquid for suspending the insoluble substances 9 at the bottom of the cavity is increased, the cleaning range of the insoluble substances 9 is expanded, the cleaning efficiency of the insoluble substances 9 is improved, the space utilization rate and the peak regulation capability of the salt cavern gas storage are improved, and finally the purpose of ensuring the supply safety of natural gas 7 in China is achieved.
As shown in fig. 5, based on the jet impact crushing device provided in the above embodiment of the present application, the present application also provides a method for crushing and cleaning insolubles at the bottom of a chamber, which mainly comprises the following steps:
step S10: installing a continuous oil pipe operation machine, ground corollary equipment and pipelines;
step S12: installing a wellhead well control device and a coiled tubing, and testing the sealing performance of the wellhead well control device;
step S14: a jet impact crushing device formed by a continuous oil pipe, a hydraulic safety joint and a nozzle is put in to crush and clean insoluble substances at the bottom of the cavity;
step S16: and further lowering the jet impact crushing device for crushing and cleaning.
Step S18: when the concentration of the fragments in the ground return liquid is lower than a preset value, the jet flow is lifted up to impact the crushing device, and the crushing and cleaning operation is completed.
In the present embodiment, the method for crushing and cleaning the insolubles in the chamber bottom will be described in detail with reference to specific operation steps.
Step S10: and installing the continuous oil pipe 10 operation machine, ground corollary equipment and pipelines.
The continuous oil pipe 10 operation machine, the liquid storage tank, the separator, the ground pump, the ground manifold and other equipment are installed on site, the working roller, the automatic shutoff valve, the oil nozzle manifold (ground water injection pump), the separator, the liquid storage tank (combustion pool), the brine conveying pump and the brine conveying pipeline are connected, the continuous oil pipe 10 operation machine hydraulic pipeline, the insertion pipe, the measuring oil pipe calibration counter and the blowout prevention pipe are connected, and a wellhead protection platform is built.
Step S12: and installing the wellhead well control device and the coiled tubing 10, and testing the sealing performance of the wellhead well control device.
(1) The method comprises the steps of disassembling an original well gas production tree cap and an upper flange, sequentially installing a reducing flange, a gate and a continuous oil pipe 10 blowout preventer unit, installing a continuous oil pipe 10 blowout prevention pipe, a blowout prevention box and an injection head, descending the continuous oil pipe 10 to the position below a first half-sealing flashboard of the blowout preventer, closing the blowout preventer, opening the blowout prevention box, testing pressure of a working roller of the continuous oil pipe 10 at 25 MPa for 30 minutes until the pressure drop of the blowout prevention box is not more than 0.7 MPa, and disassembling the connection position of the blowout prevention pipe and the blowout preventer after testing a second half-sealing flashboard and a shearing flashboard to be qualified.
(2) The bottom end of the continuous oil pipe 10 is connected with a hydraulic safety joint 11 and a hard alloy nozzle 12, a pull disc is installed, the test tension is 150KN, the clear water pressure test is carried out for 25 MPa, the sealing part is free from leakage in 30 minutes, and the pressure drop is not more than 0.7 MPa, so that the continuous oil pipe is qualified. And (4) disassembling the pull disc, installing a rotary flushing tool, and butting the blowout preventer and the blowout preventer.
(3) Testing the reducing flange, the gate, the blowout preventer stack, the blowout prevention pipe, the blowout prevention box, the continuous oil pipe 10, the working roller manifold and the oil nozzle manifold by using clean water under 21 MPa, wherein the pressure drop is not more than 0.7 MPa in 30 minutes, and the product is qualified; testing the pressure of the separator and a gas-liquid pipeline at the downstream of the separator by using clear water for 2.5 MPa, and determining that the pressure drop is not more than 0.7 MPa in 30 minutes; and (3) closing the main gate, and testing the pressure of the reducing flange, the blowout preventer stack, the blowout prevention pipe, the blowout prevention box, the continuous oil pipe 10, the working roller manifold and the oil nozzle manifold under 15 MPa for 30 minutes, wherein the pressure drop is not more than 0.7 MPa, so that the product is qualified.
Step S14: and (3) putting a jet impact crushing device formed by the continuous oil pipe 10, the hydraulic safety joint 11 and the spray head 12 into the cavity to crush and clean insoluble substances at the bottom of the cavity.
And (3) putting the jet impact crushing device, putting the pipe column to the bottom of the cavity as shown in figure 1, controlling the putting speed to be less than 6 m/min in the putting process, carrying out bottom probing pressurization to be less than 5KN, carrying out repeated probing for 1-3 times, and lifting for 0-0.5 m.
After the water-based cleaning agent is discharged to a preset position, the high-pressure pump is started on the ground, the cleaning liquid is pumped to the cavity bottom through the jet impact crushing device to crush and clean the insoluble substances 9, meanwhile, the spray head 12 can do high-speed irregular motion, and the crushing and cleaning process has the following four effects:
(1) the insoluble substances 9 mainly comprise gypsum, glauberite and mudstone, and the insoluble substances 9 at the bottom of the cavity are crushed into fragments under the dual actions of jet impact and the impact of the spray head 12, so that the crushing efficiency is improved;
(2) under the action of an unstable flow field, more debris particles 13 are easily suspended in the cleaning liquid, so that the cleaning efficiency is improved;
(3) the generated unstable flow field avoids the centrifugal movement of debris in the cleaning process of the conventional fixed spray head 12, increases the concentration of the debris at the position of the flow-back pipe column and further improves the cleaning efficiency;
(4) due to the irregular movement of the spray head 12, the impact crushing range of the high-pressure jet flow is effectively expanded, and the cleaning efficiency of the insoluble substances 9 at the bottom of the cavity is improved.
Step S16: in the step, the concentration of the fragments in the returned liquid can be judged on the ground in real time, and when the concentration of the fragments in the returned liquid on the ground is lower than a preset value, the jet impact crushing device is further lowered for crushing and cleaning.
Along with the crushing and cleaning, the insoluble substances 9 at the bottom of the cavity near the position shown in the figure 1 are continuously crushed, cleaned and returned to the ground, when the concentration of fragments (the volume percentage content of the fragments in the wellhead returned liquid, and the ratio of the volume of the fragments in the returned liquid to the volume of the returned liquid) which are returned to the ground is monitored to be lower than 10%, the jet impact crushing device is further lowered for 3-5 meters, and the lowering position is shown in the figure 3. And continuing to crush and clean.
Step S18: and (S16) when the concentration of the debris in the ground return liquid is lower than the preset value again, lifting the jet flow to impact the crushing device, and finishing the crushing and cleaning operation.
And after the jet flow impact crushing device is further lowered, the chips are continuously discharged back. When the ground monitors that the concentration of the fragments which are discharged back to the ground is lower than 10% again, the crushing and cleaning operation is preliminarily completed, and the crushing device is impacted to a wellhead by lifting jet flow to complete the crushing and cleaning operation.
Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.
Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.
A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A jet impact fragmentation device comprising: a coiled tubing, a hydraulic safety joint and a spray head which are connected in series from top to bottom in sequence,
the coiled tubing is a hollow flexible tube;
one end of the hydraulic safety joint is communicated with the continuous oil pipe, the other end of the hydraulic safety joint is communicated with the spray head, and a ball throwing seat matched with a ball is formed inside the hydraulic safety joint;
a main runner communicated with the hydraulic safety joint and at least one nozzle communicated with the main runner are formed inside the spray head, and the outer contour diameter of the spray head is larger than the outer diameter of the continuous oil pipe;
the coiled tubing, the hydraulic safety joint and the spray head form a hollow cleaning flow channel, after cleaning liquid with preset pressure is injected into the coiled tubing, the cleaning liquid is sprayed out through the spray nozzle to form high-pressure jet flow, and the spray head does irregular movement under the action of jet flow reverse thrust.
2. A jet impact breaking device according to claim 1, characterized in that the pressure drop at the nozzle is up to 40Mpa when the high-pressure jet is formed.
3. The jet impact crushing device of claim 2, wherein the spray head is a five-nozzle spray head, and the specific hole distribution mode of the five-nozzle spray head is as follows: 2 lateral nozzles, 2 45-degree oblique nozzles and 1 downward nozzle.
4. A jet impact breaking device according to claim 2, characterized in that the jet is a cemented carbide jet.
5. A jet impact breaker apparatus according to claim 1 in which the coiled tubing is coiled tubing of 50.8mm external diameter for installation in a halogen discharge string of 177.8mm external diameter, the coiled tubing and the halogen discharge string forming a debris uptake channel therebetween.
6. A method for crushing and cleaning insoluble substances at the bottom of a cavity is characterized by comprising the following steps:
installing a continuous oil pipe operation machine, ground corollary equipment and pipelines;
installing a wellhead well control device and a coiled tubing, and testing the sealing performance of the wellhead well control device;
a jet impact crushing device formed by a continuous oil pipe, a hydraulic safety joint and a nozzle is put in to crush and clean insoluble substances at the bottom of the cavity;
further lowering the jet impact crushing device for crushing and cleaning;
when the concentration of the fragments in the ground return liquid is lower than a preset value, the jet flow is lifted up to impact the crushing device, and the crushing and cleaning operation is completed.
7. The method for crushing and cleaning insolubles in the chamber bottom according to claim 6, wherein said floor support equipment comprises: after the coiled tubing operation machine, the ground corollary equipment and the pipeline are installed, the method also comprises the following steps: the working roller, the automatic shut-off valve, the oil nozzle manifold, the separator, the liquid storage tank, the brine conveying pump and the brine conveying pipeline are connected, the hydraulic pipeline of the continuous oil pipe operation machine, the insertion pipe, the measured oil pipe calibration counter and the blowout prevention pipe are connected, and a well mouth protection platform is built.
8. The method for crushing and cleaning insolubles in the chamber bottom according to claim 6,
the installation well head well control device includes with coiled tubing: dismantling an original well gas production tree cap and an upper flange, sequentially installing a reducing flange, a gate and a continuous oil pipe blowout preventer group, installing a continuous oil pipe blowout preventer, a blowout preventer box and an injection head, and descending a continuous oil pipe to a position below a first half-seal flashboard of the blowout preventer;
the test of carrying out well head well control device leakproofness includes: closing the blowout preventer, opening the blowout prevention box, testing the pressure of the coiled tubing working drum at 25 MPa for 30 minutes until the blowout prevention box is qualified, and disconnecting the blowout prevention box from the connection part of the blowout prevention pipe and the blowout preventer after testing the second half-seal gate plate and the shearing gate plate to be qualified, wherein the pressure drop of the blowout prevention box is not more than 0.7 MPa;
connecting a hydraulic safety joint and a spray head at the bottom end of the continuous oil pipe, installing a pull disc, testing the tensile force of 150KN, testing the pressure by using clean water at 25 MPa, and judging that the sealed part has no leakage and the pressure drop is not more than 0.7 MPa in 30 minutes to be qualified; disassembling the pull disc, installing a rotary flushing tool, and butting the blowout preventer and the blowout preventer;
testing the reducing flange, the gate, the blowout preventer stack, the blowout prevention pipe, the blowout prevention box, the continuous oil pipe, the working roller manifold and the oil nozzle manifold by using clean water under 21 MPa, wherein the pressure drop is not more than 0.7 MPa in 30 minutes, and the pressure is qualified; testing the pressure of the separator and the gas-liquid pipeline at the downstream of the separator by using clear water for 2.5 MPa, and determining that the pressure drop is not more than 0.7 MPa in 30 minutes; and closing the main gate, and testing the pressure of the reducing flange, the blowout preventer stack, the blowout prevention pipe, the blowout prevention box, the continuous oil pipe, the working roller manifold and the oil nozzle manifold under 15 MPa for 30 minutes until the pressure drop is not more than 0.7 MPa.
9. The method for crushing and cleaning insolubles at the bottom of the chamber according to claim 6, wherein in the process of descending into the jet impact crushing device, the descending speed is controlled to be less than 6 m/min, the pressure of the bottom probe is less than 5KN, the probe is repeated for 1-3 times, and the height is increased by 0-0.5 m.
10. The method for crushing and cleaning insolubles at the bottom of a chamber according to claim 6, wherein the insolubles are composed of gypsum, glauber's salt and mudstone.
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| CN202010504535.8A CN111636922A (en) | 2020-06-05 | 2020-06-05 | Jet impact crushing device and cavity bottom insoluble substance crushing and cleaning method |
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| CN202010504535.8A CN111636922A (en) | 2020-06-05 | 2020-06-05 | Jet impact crushing device and cavity bottom insoluble substance crushing and cleaning method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090242A (en) * | 2021-05-07 | 2021-07-09 | 江苏省制盐工业研究所有限公司 | Method for constructing salt cavern storage by directional floating pipes |
| CN114059975A (en) * | 2021-12-28 | 2022-02-18 | 四川涪瑞威尔能源技术有限公司 | Underground tool for removing abandoned well |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696720A (en) * | 2013-12-26 | 2014-04-02 | 中国海洋石油总公司 | Composite unblocking method |
| CN104975818A (en) * | 2015-06-30 | 2015-10-14 | 中国石油天然气股份有限公司 | Equipment and process method for pulling and dropping oil pipe |
| CN105275417A (en) * | 2015-05-19 | 2016-01-27 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for running in and out coiled tubing production string |
| CN107120093A (en) * | 2017-01-11 | 2017-09-01 | 中石化重庆涪陵页岩气勘探开发有限公司 | With coiled tubing is integrated to the interim capping operation device of horizontal well and application method |
| CN107152264A (en) * | 2017-06-16 | 2017-09-12 | 中国石油天然气股份有限公司西气东输管道分公司 | Coiled tubing tubular column unit and its method for arranging halogen dilatation in salt cave underground natural gas storage tank |
| CN208885186U (en) * | 2018-10-08 | 2019-05-21 | 大庆荣氏采油技术开发有限公司 | A kind of coiled tubing conveying high-pressure flow promoter system |
-
2020
- 2020-06-05 CN CN202010504535.8A patent/CN111636922A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696720A (en) * | 2013-12-26 | 2014-04-02 | 中国海洋石油总公司 | Composite unblocking method |
| CN105275417A (en) * | 2015-05-19 | 2016-01-27 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for running in and out coiled tubing production string |
| CN104975818A (en) * | 2015-06-30 | 2015-10-14 | 中国石油天然气股份有限公司 | Equipment and process method for pulling and dropping oil pipe |
| CN107120093A (en) * | 2017-01-11 | 2017-09-01 | 中石化重庆涪陵页岩气勘探开发有限公司 | With coiled tubing is integrated to the interim capping operation device of horizontal well and application method |
| CN107152264A (en) * | 2017-06-16 | 2017-09-12 | 中国石油天然气股份有限公司西气东输管道分公司 | Coiled tubing tubular column unit and its method for arranging halogen dilatation in salt cave underground natural gas storage tank |
| CN208885186U (en) * | 2018-10-08 | 2019-05-21 | 大庆荣氏采油技术开发有限公司 | A kind of coiled tubing conveying high-pressure flow promoter system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113090242A (en) * | 2021-05-07 | 2021-07-09 | 江苏省制盐工业研究所有限公司 | Method for constructing salt cavern storage by directional floating pipes |
| CN114059975A (en) * | 2021-12-28 | 2022-02-18 | 四川涪瑞威尔能源技术有限公司 | Underground tool for removing abandoned well |
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