CN112096354A - Water drainage gas production and sand washing equipment and method for gas well - Google Patents
Water drainage gas production and sand washing equipment and method for gas well Download PDFInfo
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- CN112096354A CN112096354A CN201910525314.6A CN201910525314A CN112096354A CN 112096354 A CN112096354 A CN 112096354A CN 201910525314 A CN201910525314 A CN 201910525314A CN 112096354 A CN112096354 A CN 112096354A
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- 239000004576 sand Substances 0.000 title claims abstract description 180
- 238000005406 washing Methods 0.000 title claims abstract description 149
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 13
- 239000007789 gas Substances 0.000 description 113
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 20
- 239000003345 natural gas Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 235000019606 astringent taste Nutrition 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 230000008436 biogenesis Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
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- 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)
- Cleaning In General (AREA)
Abstract
The invention provides a water drainage gas production and sand washing device and a method for a gas well, wherein the device comprises: the method comprises the following steps: the oil pipe-speed pipe string annular passage is formed between the speed pipe string and the oil pipe, and the joint is used for connecting the speed pipe string and the sand washing pipe string during sand washing. This equipment is connected sand washing tubular column and speed tubular column through utilizing the joint, utilizes sand washing tubular column and speed tubular column cooperation, pours into sand washing liquid into to the well through sand washing tubular column, can be used for the sand washing of loose sandstone gas reservoir development in-process to separate stifled, has solved loose sandstone gas field speed tubular column drainage gas production and sand washing problem simultaneously, avoids speed tubular column drainage gas production in-process speed tubular column sand to bury the risk, can resume gas well production capacity, effectively ensured the safe normal production and the steady production in gas field.
Description
Technical Field
The invention relates to the technical field of natural gas exploitation, in particular to a device and a method for water drainage gas production and sand washing of a gas well.
Background
The astringency north gas field is located in a Chaihu basin, belongs to a fourth series shallow biogenesis gas field, consists of three gas fields of an astringency north first gas field, an astringency north second gas field and a Tainan gas field, is a main gas field of a Qinghai gas field of four gas areas of China petroleum, is also a main gas source of an astringency-Ning-Lang natural gas pipeline, and is responsible for gas supply tasks of a plurality of key cities such as Ningxia, Gansu, Qinghai and the like. Fig. 1 shows a wellhead of an original production string, an oil pipe is arranged in a casing, two flow channels are formed in a gas well by a casing-oil pipe annular channel or the oil pipe during gas production, a proper production channel is selected according to the production capacity of the specific gas well, and the production channel is selected by controlling the opening and closing of valves from 1# to 7# so as to realize gas production.
In recent years, along with the deepening of the development degree of a gas field, the water output of the gas field is gradually increased, so that the yield of a gas well in an astringency north gas field is reduced by 48.6%, in addition, the sand output is serious in a loose gas reservoir like an astringency north gas field, the sand surface can be continuously increased in the production process, the sand flushing operation is often needed when the sand surface is increased to a certain degree, and during gas production, because an oil pipe cannot move, the risk that the sand output buries the oil pipe can occur in the production process, and the normal production and the stable production of the gas field are influenced.
Disclosure of Invention
In view of the above, the invention provides a device and a method for water drainage gas production and sand washing of a gas well, which are mainly used for water discharge and water drainage gas production and sand washing blockage removal after sand discharge in the development process of a loose sandstone gas reservoir, and simultaneously solve the problems of water drainage gas production and sand washing of a speed pipe column of the loose sandstone gas field, avoid the risk of sand burying of the speed pipe column in the water drainage gas production process of the speed pipe column, recover the production capacity of the gas well, effectively ensure the safe and normal production and stable production of the gas field, and play an important role in stable production by water drainage gas production of the speed pipe column. On the other hand, the velocity string is adopted for drainage and gas production, so that the flowing section area of the natural gas is reduced, the liquid carrying capacity of the gas well is increased, and the productivity of the gas well is effectively improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, there is provided an apparatus for drainage gas production and sand washing of a gas well, comprising: velocity string, hanger, joint and sand wash string.
The speed pipe column is sleeved inside an oil pipe of the gas well through the hanger, and an oil pipe-speed pipe column annular channel is formed between the speed pipe column and the oil pipe.
The joint is used for connecting the speed pipe column with the sand washing pipe column during sand washing.
Further, the sand washing pipe column is connected with a sand washing vehicle.
Further, still include: and connecting the working barrel.
The connecting work cylinder includes: the joint frame and the sealing mechanism are arranged inside the working barrel and used for supporting the joint, and a sand washing pipe column through hole is formed in the middle of the sealing mechanism.
Further, still include: the inverted hanger is arranged above the hanger and used for verifying the tensile strength after the speed pipe column is connected with the sand washing pipe column.
Further, the hanger and the inverted hanger each include: sleeve, slips, slip bowl and sealing washer, the slips the slip bowl and the sealing washer all sets up in the sleeve.
In a second aspect, a method for realizing sand washing of a gas well based on a water drainage gas production and sand washing device for the gas well is provided, which comprises the following steps:
installing a connecting working barrel provided with a joint on the upper part of an overhead valve, wherein the overhead valve is in a closed state;
inserting a sand washing pipe column with one end connected to a sand washing vehicle into the connecting working barrel from the top of the connecting working barrel through a sealing mechanism, and connecting the sand washing pipe column with the upper part of a joint;
opening a top valve to lower the joint into the hanger;
connecting the joint with a velocity string;
loosening the upper slip and the lower slip, and moving the sand washing pipe column and the speed pipe column up and down to carry out sand washing operation;
and after the sand washing operation is finished, lifting the sand washing pipe column to the wellhead, and recovering wellhead suspension.
Further, still include:
the joint is mounted to a joint carrier in the connecting mandrel.
Further, still include:
one end of the sand washing pipe column is connected with a sand washing vehicle.
Further, before the open top valve lowering sub is placed in the hanger, the method further comprises:
and (5) checking the sealing property of an annular space between the sand washing pipe column and the connecting working barrel.
Further, after the connecting joint and the speed string, the method further comprises the following steps:
and checking the tensile strength of the speed pipe column and the sand washing pipe column.
The invention provides a water drainage gas production and sand washing device and a method for a gas well, wherein the device comprises: the method comprises the following steps: the oil pipe-speed pipe string annular passage is formed between the speed pipe string and the oil pipe, and the joint is used for connecting the speed pipe string and the sand washing pipe string during sand washing. This equipment is connected sand washing tubular column and speed tubular column through utilizing the joint, utilizes sand washing tubular column and speed tubular column cooperation, pours into sand washing liquid into to the well through sand washing tubular column, can be used for the sand washing of loose sandstone gas reservoir development in-process to separate stifled, has solved loose sandstone gas field speed tubular column drainage gas production and sand washing problem simultaneously, avoids speed tubular column drainage gas production in-process speed tubular column sand to bury the risk, can resume gas well production capacity, effectively ensured the safe normal production and the steady production in gas field.
On the other hand, the velocity string is adopted for drainage and gas production, so that the flowing section area of the natural gas is reduced, the liquid carrying capacity of the gas well is increased, and the productivity of the gas well is effectively improved.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:
FIG. 1 shows a parent production string wellhead;
FIG. 2 shows a first wellhead during drainage gas production by the device for drainage gas production and sand washing of a gas well, which is provided by the embodiment of the invention;
FIG. 3 shows a second well head for water drainage and gas production by using the water drainage and gas production and sand washing equipment for the gas well provided by the embodiment of the invention;
FIG. 4a shows a first wellhead during sand washing by using the water drainage gas production and sand washing device for the gas well provided by the embodiment of the invention;
FIG. 4b shows a second wellhead for sand washing by using the water drainage gas production and sand washing device for the gas well provided by the embodiment of the invention;
FIG. 5 shows a flow chart of a method for performing sand washing of a gas well based on the apparatus for drainage gas production and sand washing of a gas well provided by the present invention;
fig. 6a to 6g show the structure of a wellhead in the sand washing process of the embodiment of the invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by anyone skilled in the art from the disclosure, the claims and the drawings of the present specification. The following examples further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the invention in any way.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The existing gas reservoir with loose reservoir rock has serious sand production, the sand surface can be continuously increased in the production process, and the risk of burying the oil pipe by the sand production can occur in the production process due to the fact that the oil pipe cannot move in the gas production process, so that the normal production and stable production of the gas field are influenced.
In order to solve the technical problems in the prior art, the embodiment of the invention provides a device for water drainage gas production and sand washing of a gas well.
The water drainage gas production and sand washing equipment for the gas well comprises: velocity string 4, hanger 5, coupling 6, and sand wash string 7.
The velocity string 4 is sleeved inside an oil pipe 1 of the gas well through the hanger 5, an oil pipe-velocity string annular channel is formed between the velocity string 4 and the oil pipe 1 (also called a production string), and the joint 6 is used for connecting the velocity string 4 with the sand washing string 7 during sand washing.
Fig. 2 shows a first wellhead during drainage gas production by using the device for drainage gas production and sand washing of the gas well provided by the embodiment of the invention. Referring to fig. 2, during water drainage and gas production, an access joint 6 and a sand washing pipe column 7 are not needed, and only a velocity pipe column 4 needs to be sleeved inside an oil pipe 1 of a gas well through a hanger 5, an oil pipe-velocity pipe column annular channel is formed between the velocity pipe column 4 and the oil pipe 1 (also called a production pipe column), and three flow channels (the oil sleeve annular channel, the oil pipe-velocity pipe column annular channel and the velocity pipe column channel) are formed in the gas well, so that the cross-sectional area of natural gas flow is reduced, the liquid carrying capacity of the gas well is increased, and a proper production channel is selected according to the production capacity of a specific gas well.
When the speed pipe column channel is selected as a production channel, the 1#, 2#, 3# valves are closed, and natural gas is output through the 5# or 6# valves through the speed pipe column 4.
When an oil pipe-speed pipe column annular channel is selected as a production channel, the 2#, 3#, 5#, 6#, and 7# valves are closed, and natural gas is output through the 1# valve.
When the speed pipe column channel is selected as a production channel, the 1#, 5#, 6#, and 7# valves are closed, and the natural gas is output through the 2# valve.
By adopting the speed pipe column to drain water and produce gas, the flowing section area of natural gas is reduced, the liquid carrying capacity of the gas well is increased, and the productivity of the gas well is effectively improved.
It is worth to be noted that the mode of action and the principle of sand washing by the water drainage gas production and sand washing device for the gas well are shown in the following.
In an alternative embodiment, the apparatus for drainage gas production and sand washing of a gas well may further include: an inverted hanger 9, see fig. 3, said inverted hanger 9 being arranged above said hanger 5 for tensile strength verification after connection of said velocity string 4 with said sand wash string 7, so that after connection there is sufficient strength to secure the sand wash process.
In an alternative embodiment, referring to fig. 4a, the hanger 5 comprises: a sleeve 54, slips 51, a slip bowl 52 and a sealing ring 53, the slips, the slip bowl and the sealing ring all being disposed within the sleeve.
The slip seat is used for hanging the slips in the sleeve, and the sealing ring is used for sealing the slips and the speed pipe column and the slips and the gap between the slip seats.
In an alternative embodiment, the inverted hanger 9 is of the same construction as the hanger 5.
In an alternative embodiment, the apparatus for drainage gas production and sand washing of a gas well may further include: and the connecting working barrel 8 is used for connecting a sand washing pipe column connected with a sand washing vehicle with the joint before the top valve (namely the 7# valve) is opened, and ensuring the safe sealing of the process that the joint is put into the hanger and the process that the joint is connected with the speed pipe column in the hanger after the top valve is opened.
Specifically, the connecting cylinder 8 includes: working barrel 85, joint frame 82 and sealing mechanism 81, joint frame and 82 sealing mechanism 81 all set up with inside the working barrel 85, joint frame 82 is used for supporting connect 6, sealing mechanism 81 middle part is equipped with the washing out pipe post through-hole.
In addition, the upper end of the working barrel 85 is provided with an upper flange 83, and the lower end is provided with a lower flange 84 so as to be connected with other equipment flanges.
In an alternative embodiment, the sand wash string 7 is connected to a sand wash truck 10. The sand washing truck 10 is used for filling the sand washing fluid into the sand washing pipe column 7 during sand washing, as shown in fig. 4 b.
When the sand surface rises to a certain height, the sand discharging operation is needed to prevent sand from burying the oil pipe or the speed pipe column.
To this end, the embodiment of the present invention provides a method for implementing sand washing of a gas well based on a water drainage gas production and sand washing apparatus for the gas well, so as to explain the operation principle of the water drainage gas production and sand washing apparatus in detail, and referring to fig. 5, the following contents may be included:
step S100: the nipple 6 is mounted to a nipple mount 82 in the connecting mandrel 8, see fig. 6 a.
Step S200: the connecting mandrel 8 with the fitting 6 mounted thereon is mounted on top of the top valve, which is in the closed state, see fig. 6 b.
Step S300: a sand wash string 7, one end of which is connected to a sand wash truck, is inserted into the interior of the connecting mandrel through the sealing mechanism from the top of the connecting mandrel 8 and is connected to the upper part of the joint, see fig. 6 c.
Step S400: the top valve is opened to lower the sub into the hanger, see fig. 6 d.
Step S500: connecting the sub to the velocity string, see fig. 6 e;
step S600: and (4) loosening the upper slip and the lower slip, moving the sand washing pipe column and the speed pipe column up and down, supplying sand washing liquid to the sand washing pipe column by the sand washing vehicle, and conveying the sand washing liquid to the well bottom to realize sand washing operation, which is shown in figure 6 f.
Wherein, the speed tubular column is constantly moved downwards according to the change of the sand surface in the sand washing process so as to drain the sand completely.
Specifically, the sand washing liquid is injected into the underground from a sand washing pipe column and a speed pipe column by a sand washing vehicle, a jet flow is formed at a pipe orifice of the underground speed pipe column to impact accumulated sand, and the washed sand is suspended in the sand washing liquid and flows back to the ground through an annular channel between the speed pipe column and an oil pipe or an oil sleeve annular channel.
Namely: the sand-washing liquid flowing at high speed is used to wash out the sand block at the bottom of the well, and the sand is carried out of the ground by the circulating ability of the upward return of the liquid flow circulation, thereby removing the accumulated sand at the bottom of the well, and recovering and improving the yield of the well or the injection quantity of the water injection well.
The speed pipe column operation vehicle mainly has the function of providing power for the up-and-down action of the speed pipe column in the sand washing process.
Step S700: and after the sand washing operation is finished, lifting the sand washing pipe column to the wellhead, and recovering the wellhead suspension, which is shown in figure 6 g.
When the sand surface rises to a certain height, the speed pipe column is connected with the sand washing pipe column, the sand washing pipe column is connected with the sand washing vehicle, slips of the speed pipe column hung at the wellhead are separated during sand washing, and sand washing operation is carried out by using the speed pipe column operation vehicle and the sand washing vehicle.
After sand washing is finished, the sand washing pipe column is lifted up and the wellhead suspension is restored, and the production state that the original speed pipe column is used for water drainage and gas production is recovered after the speed pipe column is separated.
It will be appreciated by those skilled in the art that during the sand washing operation, the sand washing fluid may also be transported to the bottom of the well through the oil jacket annular passage and/or the tubing-velocity string annular passage, and the sand-carrying sand washing fluid flows out through the velocity string and the sand washing string by virtue of the circulation capability of the upward return of the fluid circulation.
In an optional embodiment, the method for realizing sand washing of the gas well can further comprise the following steps: one end of the sand washing pipe column is connected with a sand washing vehicle.
In an alternative embodiment, before opening the top valve and lowering the sub into the hanger, the method may further comprise: and (3) checking the sealing property of an annular space between the sand washing pipe column and the connecting working barrel to prevent natural gas leakage in the sand washing process.
In an alternative embodiment, connecting the sub to the velocity string may further comprise: and checking the tensile strength of the speed pipe column and the sand washing pipe column to prevent safety accidents caused by disconnection in the sand washing process.
In summary, according to the equipment and the method for water drainage gas production and sand washing of the gas well provided by the embodiment of the invention, the sand washing pipe column is connected with the speed pipe column through the joint, the sand washing pipe column is matched with the speed pipe column, and sand washing liquid is injected into the well through the sand washing pipe column, so that the equipment and the method can be used for sand washing and blocking removal in the development process of the loose sandstone gas reservoir, simultaneously solve the problems of water drainage gas production and sand washing of the speed pipe column of the loose sandstone gas field, avoid the sand burying risk of the speed pipe column in the water drainage gas production process of the speed pipe column, recover the production capacity of the gas well, and effectively ensure safe and normal production and stable production of the gas field.
By developing the practical application of a plurality of wells in the Qinghai northaceous loose sandstone gas reservoir, the device and the method provided by the embodiment of the invention can realize sand washing to prevent sand production when the speed pipe column drains water and recovers gas in the northaceous gas field, effectively give consideration to the drainage and recovery and the sand washing of the speed pipe column, effectively ensure the normal production and stable production of the gas field and have good effect.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but may be embodied or carried out by various modifications, equivalents and changes without departing from the spirit and scope of the invention.
Claims (10)
1. An apparatus for drainage gas production and sand washing of a gas well, comprising: a speed pipe column, a hanger, a joint and a sand washing pipe column,
the speed pipe column is sleeved in the oil pipe of the gas well through the hanger, an oil pipe-speed pipe column annular passage is formed between the speed pipe column and the oil pipe,
the joint is used for connecting the speed pipe column with the sand washing pipe column during sand washing.
2. The apparatus for drainage gas production and sand washing for gas wells as claimed in claim 1 wherein the sand washing string is connected to a sand washing truck.
3. An apparatus for drainage gas production and sand washing for a gas well as claimed in claim 1 further comprising: is connected with the working barrel and is provided with a working barrel,
the connecting work cylinder includes: the joint frame and the sealing mechanism are arranged inside the working barrel and used for supporting the joint, and a sand washing pipe column through hole is formed in the middle of the sealing mechanism.
4. An apparatus for drainage gas production and sand washing for a gas well as claimed in claim 1 further comprising: the inverted hanger is arranged above the hanger and used for verifying the tensile strength after the speed pipe column is connected with the sand washing pipe column.
5. The apparatus for dewatering gas production and sand washing for a gas well of claim 4 wherein the hanger and the inverted hanger each comprise: sleeve, slips, slip bowl and sealing washer, the slips the slip bowl and the sealing washer all sets up in the sleeve.
6. A method for realizing sand washing of a gas well based on water drainage gas production and sand washing equipment for the gas well is characterized by comprising the following steps:
installing a connecting working barrel provided with a joint on the upper part of an overhead valve, wherein the overhead valve is in a closed state;
inserting a sand washing pipe column with one end connected to a sand washing vehicle into the connecting working barrel from the top of the connecting working barrel through a sealing mechanism, and connecting the sand washing pipe column with the upper part of a joint;
opening a top valve to lower the joint into the hanger;
connecting the joint with a velocity string;
loosening the upper slip and the lower slip, and moving the sand washing pipe column and the speed pipe column up and down to carry out sand washing operation;
and after the sand washing operation is finished, lifting the sand washing pipe column to the wellhead, and recovering wellhead suspension.
7. A method of effecting sand washing in a gas well based on an apparatus for drainage gas production and sand washing in a gas well according to claim 6, further comprising:
the joint is mounted to a joint carrier in the connecting mandrel.
8. A method of effecting sand washing in a gas well based on an apparatus for drainage gas production and sand washing in a gas well according to claim 6, further comprising:
one end of the sand washing pipe column is connected with a sand washing vehicle.
9. A method of effecting sand washing in a gas well based on an apparatus for drainage gas recovery and sand washing in a gas well according to claim 6, wherein before opening the top valve and lowering the sub into the hanger, further comprising:
and (5) checking the sealing property of an annular space between the sand washing pipe column and the connecting working barrel.
10. A method of effecting sand washing in a gas well based on an apparatus for drainage gas production and sand washing in a gas well according to claim 6, wherein the connecting sub is followed by a velocity string and further comprises:
and checking the tensile strength of the speed pipe column and the sand washing pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910525314.6A CN112096354B (en) | 2019-06-18 | 2019-06-18 | Apparatus and method for drainage gas production and sand flushing of gas wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910525314.6A CN112096354B (en) | 2019-06-18 | 2019-06-18 | Apparatus and method for drainage gas production and sand flushing of gas wells |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112096354A true CN112096354A (en) | 2020-12-18 |
| CN112096354B CN112096354B (en) | 2023-05-26 |
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| CN201910525314.6A Active CN112096354B (en) | 2019-06-18 | 2019-06-18 | Apparatus and method for drainage gas production and sand flushing of gas wells |
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| CN203022643U (en) * | 2012-11-03 | 2013-06-26 | 中国石油化工股份有限公司 | Loss oil layer double-tube continuous sand removal tubular column |
| CN108119073A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | Reverse circulation sand washing well-flushing pipe column |
| CN108979569A (en) * | 2018-07-02 | 2018-12-11 | 杰瑞能源服务有限公司 | A kind of method of three layers of de-plugging of fixed tubular column |
| CN208330213U (en) * | 2018-04-24 | 2019-01-04 | 中国石油天然气股份有限公司 | Metal pipe joint for connecting composite continuous oil pipe with built-in cable |
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| CN112096354B (en) | 2023-05-26 |
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