CN109296333B - Buffer type speed pipe column plug and use method thereof - Google Patents
Buffer type speed pipe column plug and use method thereof Download PDFInfo
- Publication number
- CN109296333B CN109296333B CN201811210780.7A CN201811210780A CN109296333B CN 109296333 B CN109296333 B CN 109296333B CN 201811210780 A CN201811210780 A CN 201811210780A CN 109296333 B CN109296333 B CN 109296333B
- Authority
- CN
- China
- Prior art keywords
- sealing sleeve
- head
- inner connecting
- protective cover
- connecting pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 181
- 230000001681 protective effect Effects 0.000 claims abstract description 56
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 39
- 230000000903 blocking effect Effects 0.000 claims description 26
- 238000005096 rolling process Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 13
- 239000010779 crude oil Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 83
- 238000005516 engineering process Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a buffer type speed pipe column blanking plug and a use method thereof, the buffer type speed pipe column blanking plug comprises a seat buffer piece, an inner connecting pipe, an upper sealing sleeve, a lower sealing sleeve, a blanking plug head, a protective cover, a guide head and a vent hole, wherein the lower end of the seat buffer piece is connected with the inner connecting pipe, the lower end of the inner connecting pipe is connected with the upper sealing sleeve, the lower end of the upper sealing sleeve is connected with the lower sealing sleeve, the blanking plug head is fixed at the lower end of the lower sealing sleeve, the lower side of the inner connecting pipe, the upper sealing sleeve, the lower sealing sleeve and the blanking plug head are sequentially arranged in the protective cover from top to bottom, the guide head is arranged at the lower end of the protective cover, a cavity is arranged between the blanking plug head and the guide head, the vent hole is arranged at the peripheral wall of the cavity of the protective cover, and the seat buffer piece, the inner connecting pipe, the upper sealing sleeve, the lower sealing sleeve and the protective cover are hollow annular structures.
Description
Technical Field
The invention belongs to the technical field of gas field exploitation, and particularly relates to a buffer type speed pipe column plug and a use method thereof, which are suitable for a liquid-gas-accumulating well adopting speed pipe column drainage to produce gas.
Background
With gas well production timeThe productivity of the gas well is gradually reduced, when the productivity is lower than the critical liquid carrying flow rate, the bottom of the well starts to accumulate liquid, and if the liquid draining measures are not adopted in time, the gas well can be flooded and stopped. The technology for draining and producing gas by using a speed pipe column is based on the two-phase flow and the minimum flow carrying theory of a shaft, a coiled tubing with the diameter of 38.1 multiplied by 3.2mm is put into a crude oil pipe with the diameter of 73mm of a gas well to serve as a production pipe column, and the coiled tubing is suspended at a gas production well head through a special hanger after being cut off. After a long period of production using velocity string carrier fluid, the actual production of the gas well is below the critical carrier fluid flow rate of the in-service phi 38.1mm coiled tubing (i.e., 2000m 3 And/d), the gas well reappears effusion. Theoretical research on the velocity string technology shows that the technology is applied to 2000m gas production rate 3 And the drainage and gas production effects of the liquid-gas accumulation well above/d are obvious.
The plunger gas lift drainage gas production technology is to put a plunger with the diameter of 59mm in an original oil pipe with the diameter of 73mm of a gas well, fully utilize the self energy of the gas well to push the plunger to reciprocate in the oil pipe, and realize periodic liquid lift, thereby effectively preventing gas from channeling and liquid slipping, increasing the lifting efficiency, and the technology has the advantages of 500-3000m for gas production 3 And/d, the drainage gas production effect is very obvious. When the gas well yield is reduced to 500m 3 And/d, deducting equipment depreciation and maintenance costs, labor costs and the like, wherein the well can not create economic benefits any more and basically reaches the waste standard.
Aiming at the situation that a coiled tubing with phi 38.1 multiplied by 3.2mm is put into a phi 73mm crude oil pipe to serve as a speed string to drain and produce gas, the current method is to lift the speed string, then put a phi 59mm plunger into the phi 73mm crude oil pipe to conduct plunger gas lift, drain and produce gas, but the process is complex compared with the speed string, the cost is high, and the consumed manpower and material resources are high. How to combine the drainage and gas production of the speed pipe column and the gas lift drainage and gas production of the plunger is a technical problem which puzzles the natural gas production unit.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a buffer type speedThe pipe column blanking plug and the use method thereof overcome the following problems 1: the velocity string drainage gas production technology is 2000m for gas production 3 The liquid-accumulating gas well below/d has no effect; 2: plunger gas lift drainage gas production technology is 500m for gas production 3 The liquid-accumulating gas well below/d has no effect; 3: there is no device for combining the two methods, and the problems of a drainage gas production method and the like.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a buffering formula speed tubular column blanking plug, is including the ware bolster of sitting, interior takeover, go up seal cover, lower seal cover, plug head, protection casing, direction head and air vent, the ware bolster of sitting lower extreme is connected and is taken over, and wherein interior takeover lower extreme is connected and is gone up the seal cover, the seal cover lower extreme is connected and is gone up the seal cover, and wherein the seal cover lower extreme is fixed with the plug head down, the downside of inscription pipe, go up seal cover, lower seal cover and plug head from top to bottom set gradually in the protection casing inside, and wherein the protection casing lower extreme is equipped with the direction head, the protection casing is equipped with the cavity between plug head and direction head, and wherein the cavity department perisporium of protection casing is equipped with the air vent, the ware bolster of sitting, interior takeover, go up seal cover, lower seal cover and protection casing are cavity annular structure.
Preferably, the seat buffer piece comprises a salvage head, a spring pin, a spring, a seat core bar and a buffer sleeve, wherein the lower end of the salvage head is connected with the seat core bar through a screw thread, the spring sleeve is arranged on the outer side of the seat core bar, the upper end of the spring is fixed on the salvage head through the spring pin, the lower end of the seat core bar is connected with the buffer sleeve, and the lower end of the buffer sleeve is sleeved inside the upper end of the inner connecting pipe.
Preferably, the upper side of the inner connecting pipe is provided with a rolling groove along the circumference, wherein the rolling groove is matched with the speed pipe column, the outer wall of the upper side of the inner connecting pipe is sleeved with an upper O-shaped sealing ring, and the upper O-shaped sealing ring is used for sealing the speed pipe column and the inner connecting pipe.
Preferably, the inner connecting pipe is connected with the protective cover through a first screw, a sealing gasket is arranged at the joint of the inner connecting pipe and the upper sealing sleeve, the upper sealing sleeve is connected with the protective cover through an upper fastening screw, a lower O-shaped sealing ring is arranged at the joint of the inner side surface of the upper sealing sleeve and the inner side surface of the lower sealing sleeve, an upper lip-shaped sealing ring and an upper sealing flat gasket are sequentially arranged at the joint of the end surface of the upper sealing sleeve and the end surface of the lower sealing sleeve, the lower sealing sleeve is connected with the protective cover through a lower fastening screw, a lower lip-shaped sealing ring and a lower sealing flat gasket are sequentially arranged at the joint of the lower sealing sleeve and the end surface of the blocked head, the blocked head is fixed through a cotter pin, and a blocking head falls into a cavity at the bottom of a cavity of the protective cover.
Preferably, the cross section of the upper lip type sealing ring and the lower lip type sealing ring along the axial direction is of a human-shaped structure, wherein an opening of the human-shaped structure faces downwards, the upper lip type sealing ring and the lower lip type sealing ring are extension arms with two tail parts connected, and the extension arms can be compressed to seal under pressure.
Preferably, the upper end of the blocking head is sleeved in the lower sealing sleeve, wherein the lower end of the blocking head is provided with a blocking head stretching wing, and the size of the blocking head stretching wing is larger than that of the hollow hole of the lower sealing sleeve.
Preferably, the guide head is connected with the protective cover through a second screw, wherein the guide head is in a bullet structure.
Preferably, the vent holes are strip holes, wherein the strip holes are uniformly arranged along the axial direction of the blanking plug.
Preferably, a method for using the buffer type speed pipe column blanking plug comprises the following steps:
step 1): the method comprises the steps of removing a seat buffer piece of a blanking plug, connecting one side of the blanking plug, which is provided with a rolling groove, with the lower end of a speed pipe column through rolling, pulling out a tail pin, then, lowering the blanking plug into a well shaft along with the speed pipe column, and blocking the inside of the speed pipe column by using the blanking plug to prevent gas in the well shaft from being produced along the speed pipe column;
step 2): after the sealing and hanging of the speed pipe column at the wellhead is finished, introducing high-pressure gas in the casing of the gas well into the speed pipe column, then carrying out annular production by utilizing the speed pipe column and the crude oil pipe, so that pressure difference is generated between the upper part and the lower part of a blocking head of the blocking device, and further, the blocking head stretches wings of the blocking head are knocked out, the blocking head falls into a cavity due to gravity, then the speed pipe column is adopted for draining and producing gas, and wellbore effusion is removed, and the normal production of the gas well is restored;
step 3): when the gas well enters the later stage and the speed pipe column cannot normally drain and produce gas, a seat buffer piece can be put in the speed pipe column from the wellhead, the lower end of the seat buffer piece is sleeved in the inner connecting pipe, then a plunger is put in, and the seat buffer piece is provided with a salvaging head, a buffer spring, a seat core rod and a buffer sleeve.
Compared with the prior art, the invention has the advantages that:
(1) The invention can plug the interior of the speed pipe column, prevent gas from being produced in a shaft when the speed pipe column is lowered to the designed depth, and drain and produce gas by adopting the speed pipe column after the speed pipe column is lowered to the designed depth; when the plunger is put in the speed pipe column, the plunger can be supported and buffered, so that plunger gas lift, water drainage and gas production can be carried out in the speed pipe column in the later period, and three technical problems of in-pipe blocking and plunger supporting and buffering are solved uniformly;
(2) The invention can furthest mine the gas well, greatly increases the production efficiency of the gas well, increases the gas flow rate in the shaft, thereby improving the liquid carrying capacity of the gas well and ensuring the stable production of the gas well;
(3) The blanking plug has the advantages of simple structure, convenient operation, low cost, reduced consumption of manpower and material resources, easy operation and simple process.
Drawings
FIG. 1 is a schematic view of the semi-sectional structure of the present invention.
Reference numerals illustrate:
the device comprises a 1-speed pipe column, a 2-rolling groove, a 3-upper O-shaped sealing ring, a 4-inner connecting pipe, a 5-first screw, a 6-sealing gasket, a 7-upper fastening screw, an 8-upper sealing sleeve, a 9-lower O-shaped sealing ring, a 10-upper lip-shaped sealing ring, an 11-upper sealing flat gasket, a 12-lower fastening screw, a 13-lower sealing sleeve, a 14-lower lip-shaped sealing ring, a 15-lower sealing flat gasket, a 16-plugging head, a 17-cotter pin, a 18-protective cover, a 19-second screw, a 20-guiding head, a 21-salvaging head, a 22-spring pin, a 23-spring, a 24-seat core bar, a 25-buffer sleeve, a 26-vent hole and a 27-plugging head.
Detailed Description
The following describes specific embodiments of the invention with reference to the drawings and examples:
it should be noted that the structures, proportions, sizes, etc. shown in the drawings are merely used in conjunction with the disclosure of the present invention, and are not intended to limit the applicable limitations of the present invention, but any modification, variation in proportions, or adjustment of the size of the structures, proportions, etc. should be construed as falling within the scope of the disclosure without affecting the efficacy or achievement of the present invention.
Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Example 1
As shown in fig. 1, the invention discloses a buffer type speed pipe column blanking plug, which comprises a seat buffer part, an inner connecting pipe 4, an upper sealing sleeve 8, a lower sealing sleeve 13, a blanking plug head 16, a protective cover 18, a guide head 20 and a vent hole 26, wherein the lower end of the seat buffer part is connected with the inner connecting pipe 4, the lower end of the inner connecting pipe 4 is connected with the upper sealing sleeve 8, the lower end of the upper sealing sleeve 8 is connected with the lower sealing sleeve 13, the blanking plug head 16 is fixed at the lower end of the lower sealing sleeve 13, the lower side of the inner connecting pipe 4, the upper sealing sleeve 8, the lower sealing sleeve 13 and the blanking plug head 16 are sequentially arranged in the protective cover 18 from top to bottom, the guide head 20 is arranged at the lower end of the protective cover 18, a cavity is arranged between the blanking plug head 16 and the guide head 20, the vent hole 26 is arranged at the peripheral wall of the cavity of the protective cover 18, and the seat buffer part, the upper sealing sleeve 8, the lower sealing sleeve 13 and the protective cover 18 are hollow annular structures.
Example 2
As shown in fig. 1, the invention discloses a buffer type speed pipe column blanking plug, which comprises a seat buffer part, an inner connecting pipe 4, an upper sealing sleeve 8, a lower sealing sleeve 13, a blanking plug head 16, a protective cover 18, a guide head 20 and a vent hole 26, wherein the lower end of the seat buffer part is connected with the inner connecting pipe 4, the lower end of the inner connecting pipe 4 is connected with the upper sealing sleeve 8, the lower end of the upper sealing sleeve 8 is connected with the lower sealing sleeve 13, the blanking plug head 16 is fixed at the lower end of the lower sealing sleeve 13, the lower side of the inner connecting pipe 4, the upper sealing sleeve 8, the lower sealing sleeve 13 and the blanking plug head 16 are sequentially arranged in the protective cover 18 from top to bottom, the guide head 20 is arranged at the lower end of the protective cover 18, a cavity is arranged between the blanking plug head 16 and the guide head 20, the vent hole 26 is arranged at the peripheral wall of the cavity of the protective cover 18, and the seat buffer part, the upper sealing sleeve 8, the lower sealing sleeve 13 and the protective cover 18 are hollow annular structures.
As shown in fig. 1, preferably, the seat buffer member comprises a salvage head 21, a spring pin 22, a spring 23, a seat core bar 24 and a buffer sleeve 25, wherein the lower end of the salvage head 21 is connected with the seat core bar 24 through threads, the spring 23 is sleeved outside the seat core bar 24, the upper end of the spring 23 is fixed on the salvage head 21 through the spring pin 22, the lower end of the seat core bar 24 is connected with the buffer sleeve 25, and the lower end of the buffer sleeve 25 is sleeved inside the upper end of the inner connecting tube 4.
Example 3
As shown in fig. 1, the invention discloses a buffer type speed pipe column blanking plug, which comprises a seat buffer part, an inner connecting pipe 4, an upper sealing sleeve 8, a lower sealing sleeve 13, a blanking plug head 16, a protective cover 18, a guide head 20 and a vent hole 26, wherein the lower end of the seat buffer part is connected with the inner connecting pipe 4, the lower end of the inner connecting pipe 4 is connected with the upper sealing sleeve 8, the lower end of the upper sealing sleeve 8 is connected with the lower sealing sleeve 13, the blanking plug head 16 is fixed at the lower end of the lower sealing sleeve 13, the lower side of the inner connecting pipe 4, the upper sealing sleeve 8, the lower sealing sleeve 13 and the blanking plug head 16 are sequentially arranged in the protective cover 18 from top to bottom, the guide head 20 is arranged at the lower end of the protective cover 18, a cavity is arranged between the blanking plug head 16 and the guide head 20, the vent hole 26 is arranged at the peripheral wall of the cavity of the protective cover 18, and the seat buffer part, the upper sealing sleeve 8, the lower sealing sleeve 13 and the protective cover 18 are hollow annular structures.
As shown in fig. 1, preferably, the seat buffer member comprises a salvage head 21, a spring pin 22, a spring 23, a seat core bar 24 and a buffer sleeve 25, wherein the lower end of the salvage head 21 is connected with the seat core bar 24 through threads, the spring 23 is sleeved outside the seat core bar 24, the upper end of the spring 23 is fixed on the salvage head 21 through the spring pin 22, the lower end of the seat core bar 24 is connected with the buffer sleeve 25, and the lower end of the buffer sleeve 25 is sleeved inside the upper end of the inner connecting tube 4.
As shown in fig. 1, preferably, a rolling groove 2 is circumferentially arranged on the upper side of the inner joint pipe 4, wherein the rolling groove 2 is matched with the speed pipe column 1, an upper O-shaped sealing ring 3 is sleeved on the outer wall of the upper side of the inner joint pipe 4, and the upper O-shaped sealing ring 3 is used for sealing the speed pipe column 1 and the inner joint pipe 4.
Example 4
As shown in fig. 1, the invention discloses a buffer type speed pipe column blanking plug, which comprises a seat buffer part, an inner connecting pipe 4, an upper sealing sleeve 8, a lower sealing sleeve 13, a blanking plug head 16, a protective cover 18, a guide head 20 and a vent hole 26, wherein the lower end of the seat buffer part is connected with the inner connecting pipe 4, the lower end of the inner connecting pipe 4 is connected with the upper sealing sleeve 8, the lower end of the upper sealing sleeve 8 is connected with the lower sealing sleeve 13, the blanking plug head 16 is fixed at the lower end of the lower sealing sleeve 13, the lower side of the inner connecting pipe 4, the upper sealing sleeve 8, the lower sealing sleeve 13 and the blanking plug head 16 are sequentially arranged in the protective cover 18 from top to bottom, the guide head 20 is arranged at the lower end of the protective cover 18, a cavity is arranged between the blanking plug head 16 and the guide head 20, the vent hole 26 is arranged at the peripheral wall of the cavity of the protective cover 18, and the seat buffer part, the upper sealing sleeve 8, the lower sealing sleeve 13 and the protective cover 18 are hollow annular structures.
As shown in fig. 1, preferably, the seat buffer member comprises a salvage head 21, a spring pin 22, a spring 23, a seat core bar 24 and a buffer sleeve 25, wherein the lower end of the salvage head 21 is connected with the seat core bar 24 through threads, the spring 23 is sleeved outside the seat core bar 24, the upper end of the spring 23 is fixed on the salvage head 21 through the spring pin 22, the lower end of the seat core bar 24 is connected with the buffer sleeve 25, and the lower end of the buffer sleeve 25 is sleeved inside the upper end of the inner connecting tube 4.
As shown in fig. 1, preferably, a rolling groove 2 is circumferentially arranged on the upper side of the inner joint pipe 4, wherein the rolling groove 2 is matched with the speed pipe column 1, an upper O-shaped sealing ring 3 is sleeved on the outer wall of the upper side of the inner joint pipe 4, and the upper O-shaped sealing ring 3 is used for sealing the speed pipe column 1 and the inner joint pipe 4.
As shown in fig. 1, preferably, the inner connecting tube 4 is connected with the protective cover 18 through a first screw 5, a sealing gasket 6 is arranged at the joint of the inner connecting tube 4 and the upper sealing sleeve 8, the upper sealing sleeve 8 is connected with the protective cover 18 through an upper fastening screw 7, a lower O-shaped sealing ring 9 is arranged at the joint of the inner side surface of the upper sealing sleeve 8 and the inner side surface of the lower sealing sleeve 13, an upper lip-shaped sealing ring 10 and an upper sealing flat gasket 11 are sequentially arranged at the joint of the upper sealing sleeve 8 and the end surface of the lower sealing sleeve 13, the lower sealing sleeve 13 is connected with the protective cover 18 through a lower fastening screw 12, a lower lip-shaped sealing ring 14 and a lower sealing flat gasket 15 are sequentially arranged at the joint of the lower sealing sleeve 13 and the end surface of the plugging head 16, the plugging head 16 is fixed through a cotter pin 17, and a plugging head falling into a cavity 27 is arranged at the bottom of a cavity of the protective cover 18.
As shown in fig. 1, the cross section of the upper lip type sealing ring 10 and the lower lip type sealing ring 14 along the axial direction is preferably of a "man" type structure, wherein the opening of the "man" type structure faces downwards, and the upper lip type sealing ring 10 and the lower lip type sealing ring 14 are extension arms with two tail parts connected, and the extension arms can be compressed for sealing under pressure.
As shown in fig. 1, preferably, the upper end of the plugging head 16 is sleeved inside the lower sealing sleeve 13, wherein the lower end of the plugging head 16 is provided with a plugging head extending wing, and the size of the plugging head extending wing is larger than that of the hollow hole of the lower sealing sleeve 13.
As shown in fig. 1, the guide head 20 is preferably connected to the protective cover 18 by a second screw 19, wherein the guide head 20 has a bullet-shaped structure.
As shown in fig. 1, the vent holes 26 are preferably elongated holes, wherein the elongated holes are uniformly disposed along the axial direction of the blanking plug.
Example 5
As shown in fig. 1, the invention discloses a buffer type speed pipe column blanking plug, which comprises a seat buffer part, an inner connecting pipe 4, an upper sealing sleeve 8, a lower sealing sleeve 13, a blanking plug head 16, a protective cover 18, a guide head 20 and a vent hole 26, wherein the lower end of the seat buffer part is connected with the inner connecting pipe 4, the lower end of the inner connecting pipe 4 is connected with the upper sealing sleeve 8, the lower end of the upper sealing sleeve 8 is connected with the lower sealing sleeve 13, the blanking plug head 16 is fixed at the lower end of the lower sealing sleeve 13, the lower side of the inner connecting pipe 4, the upper sealing sleeve 8, the lower sealing sleeve 13 and the blanking plug head 16 are sequentially arranged in the protective cover 18 from top to bottom, the guide head 20 is arranged at the lower end of the protective cover 18, a cavity is arranged between the blanking plug head 16 and the guide head 20, the vent hole 26 is arranged at the peripheral wall of the cavity of the protective cover 18, and the seat buffer part, the upper sealing sleeve 8, the lower sealing sleeve 13 and the protective cover 18 are hollow annular structures.
As shown in fig. 1, preferably, the seat buffer member comprises a salvage head 21, a spring pin 22, a spring 23, a seat core bar 24 and a buffer sleeve 25, wherein the lower end of the salvage head 21 is connected with the seat core bar 24 through threads, the spring 23 is sleeved outside the seat core bar 24, the upper end of the spring 23 is fixed on the salvage head 21 through the spring pin 22, the lower end of the seat core bar 24 is connected with the buffer sleeve 25, and the lower end of the buffer sleeve 25 is sleeved inside the upper end of the inner connecting tube 4.
As shown in fig. 1, preferably, a rolling groove 2 is circumferentially arranged on the upper side of the inner joint pipe 4, wherein the rolling groove 2 is matched with the speed pipe column 1, an upper O-shaped sealing ring 3 is sleeved on the outer wall of the upper side of the inner joint pipe 4, and the upper O-shaped sealing ring 3 is used for sealing the speed pipe column 1 and the inner joint pipe 4.
As shown in fig. 1, preferably, the inner connecting tube 4 is connected with the protective cover 18 through a first screw 5, a sealing gasket 6 is arranged at the joint of the inner connecting tube 4 and the upper sealing sleeve 8, the upper sealing sleeve 8 is connected with the protective cover 18 through an upper fastening screw 7, a lower O-shaped sealing ring 9 is arranged at the joint of the inner side surface of the upper sealing sleeve 8 and the inner side surface of the lower sealing sleeve 13, an upper lip-shaped sealing ring 10 and an upper sealing flat gasket 11 are sequentially arranged at the joint of the upper sealing sleeve 8 and the end surface of the lower sealing sleeve 13, the lower sealing sleeve 13 is connected with the protective cover 18 through a lower fastening screw 12, a lower lip-shaped sealing ring 14 and a lower sealing flat gasket 15 are sequentially arranged at the joint of the lower sealing sleeve 13 and the end surface of the plugging head 16, the plugging head 16 is fixed through a cotter pin 17, and a plugging head falling into a cavity 27 is arranged at the bottom of a cavity of the protective cover 18.
As shown in fig. 1, the cross section of the upper lip type sealing ring 10 and the lower lip type sealing ring 14 along the axial direction is preferably of a "man" type structure, wherein the opening of the "man" type structure faces downwards, and the upper lip type sealing ring 10 and the lower lip type sealing ring 14 are extension arms with two tail parts connected, and the extension arms can be compressed for sealing under pressure.
As shown in fig. 1, preferably, the upper end of the plugging head 16 is sleeved inside the lower sealing sleeve 13, wherein the lower end of the plugging head 16 is provided with a plugging head extending wing, and the size of the plugging head extending wing is larger than that of the hollow hole of the lower sealing sleeve 13.
As shown in fig. 1, the guide head 20 is preferably connected to the protective cover 18 by a second screw 19, wherein the guide head 20 has a bullet-shaped structure.
As shown in fig. 1, the vent holes 26 are preferably elongated holes, wherein the elongated holes are uniformly disposed along the axial direction of the blanking plug.
As shown in fig. 1, a method for using the buffer type speed string plug as described above is preferable, and includes the following steps:
step 1): the method comprises the steps of removing a seat buffer piece of a blanking plug, connecting one side of the blanking plug, which is provided with a rolling groove 2, with the lower end of a speed string 1 through rolling, pulling out a tail pin 17, then lowering the blanking plug into a well shaft along with the speed string 1, and blocking the inside of the speed string 1 by using the blanking plug to prevent gas in the well shaft from being produced along the speed string 1;
step 2): after the sealing and hanging of the speed pipe column 1 at the wellhead is finished, introducing high-pressure gas in a casing of the gas well into the speed pipe column 1, then carrying out annular production by utilizing the speed pipe column 1 and a crude oil pipe, and enabling the upper and lower parts of a plugging head 16 of a plugging device to generate pressure difference, so that a plugging head stretching wing of the plugging head 16 is broken, the plugging head 16 falls into a cavity 27 due to gravity, then draining water and producing gas by adopting the speed pipe column 1, removing accumulated liquid of a shaft, and recovering normal production of the gas well;
step 3): when the gas well enters the later stage and the speed pipe column 1 cannot normally drain, the well head can put in the seat buffer piece towards the inside of the speed pipe column 1, the lower end of the seat buffer piece is sleeved in the inner connecting pipe 4, then the plunger is put in, and the seat buffer piece is provided with the fishing head 21, the buffer spring 23, the seat core rod 24 and the buffer sleeve 25, and the buffer spring 23 is naturally compressed due to the gravity of the plunger, so that the function of buffering the plunger is achieved, the seat core rod 24 is used for bearing the plunger, then the plunger gas lift, drainage and gas production are carried out in the speed pipe column 1, so that the accumulated liquid of the well shaft is removed, and the gas well is restored to normal production again.
The salvaging head 21 and the seat core bar 24 are connected through screw threads on the ground, the upper end of the spring 23 is fixed on the salvaging head 21 through a spring pin 22, the lower end of the spring 23 is not fixed, and the seat core bar 24 and the buffer sleeve 25 are connected in an inserted mode. When the gas well enters the later production period and the speed pipe column can not normally drain and produce gas, the salvaging head 21 is grasped through steel wire operation at the wellhead, the seat buffer piece is put into the speed pipe column, then the plunger is put through wellhead steel wire operation, and the plunger gas lift drainage and gas production is carried out.
The speed string 1, the well shaft, the well casing, the crude oil pipe and the plunger are all common devices for the development of the existing gas well.
The rolling groove 2 is arranged along the circumference of the plug, is arranged in a wave shape in the axial direction of the plug, the end part of the speed pipe column 1 is also provided with a wave groove, and the rolling groove 2 of the inner connecting pipe 4 is matched with the wave groove at the end part of the speed pipe column 1.
The upper O-ring 6 and the lower O-ring 9 are rubber rings with circular cross sections, and are called O-rings because of their O-shape cross sections.
The gasket 6 is a sealing spare part for machines, equipment and pipelines, and is used in places where fluid exists, and materials with sealing functions are used inside and outside.
The cotter 17 is an existing original piece, wherein the cotter 17 crosses the protective cover 18 to fix the plugging head, the cotter 17 is pulled out before the lower speed pipe column 1, at this time, the buffer type plug is slightly operated to prevent the plug head 16 from falling off, after the lower speed pipe column 1, the upward jacking force applied by the plug head 16 is gradually increased due to the jacking force in the shaft, and the plug head 16 is more and more firm.
The guide head 20 has a bullet structure, and has small resistance and high running speed when running into a shaft along with the speed pipe column 1.
The working principle of the invention is as follows:
the blanking plug for removing the buffer part of the sitting device is connected to the bottom of the speed pipe column 1 on the ground in a rolling way, and is lowered into a well shaft of a gas well along with the speed pipe column 1, the inside of the speed pipe column 1 is plugged by the blanking plug to prevent gas in the well shaft from being produced along the speed pipe column 1, after the speed pipe column 1 is sealed and suspended at the wellhead, high-pressure gas in a well casing is introduced into the inside of the speed pipe column 1, and then the blanking plug 16 of the blanking plug is enabled to generate pressure difference up and down by using the speed pipe column 1 and crude oil pipe for annular production, so that the extension wings of the blanking plug are knocked out, the blanking plug 16 falls into a cavity 27 due to gravity, then the speed pipe 1 is used for draining and producing gas, the accumulated liquid of the well shaft is removed, and normal production of the gas well is restored. In addition, if the gas well enters the later stage, when the speed pipe column 1 cannot normally drain water and produce gas, a seat buffer piece is put in the speed pipe column 1 at the wellhead and used for receiving the plunger, and then the plunger gas lift is carried out in the speed pipe column 1 to drain water and produce gas, so that accumulated liquid in a shaft is removed, and the natural gas well is restored to normal production again.
The invention can plug the interior of the speed pipe column, prevent gas from being produced in a shaft when the speed pipe column is lowered to the designed depth, and drain and produce gas by adopting the speed pipe column after the speed pipe column is lowered to the designed depth; when the plunger is put in the speed pipe column, the plunger can be supported and buffered, so that plunger gas lift, water drainage and gas production can be carried out in the speed pipe column in the later period, and the three technical problems of in-pipe blocking, plunger supporting and buffering are solved uniformly.
The invention can furthest mine the gas well, greatly increases the production efficiency of the gas well, increases the gas flow rate in the shaft, thereby improving the liquid carrying capacity of the gas well and ensuring the stable production of the gas well; the blanking plug has the advantages of simple structure, convenient operation, low cost, reduced consumption of manpower and material resources, easy operation and simple process.
While the preferred embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Many other changes and modifications may be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (6)
1. A buffer type speed pipe column blanking plug, which is characterized in that: the sealing device comprises a seat buffer piece, an inner connecting pipe (4), an upper sealing sleeve (8), a lower sealing sleeve (13), a blocking head (16), a protective cover (18), a guide head (20) and a vent hole (26), wherein the lower end of the seat buffer piece is connected with the inner connecting pipe (4), the lower end of the inner connecting pipe (4) is connected with the upper sealing sleeve (8), the lower end of the upper sealing sleeve (8) is connected with the lower sealing sleeve (13), the blocking head (16) is fixed at the lower end of the lower sealing sleeve (13), the lower side of the inner connecting pipe (4), the upper sealing sleeve (8), the lower sealing sleeve (13) and the blocking head (16) are sequentially arranged inside the protective cover (18) from top to bottom, the guide head (20) is arranged at the lower end of the protective cover (18), a cavity is formed between the blocking head (16) and the guide head (20), the vent hole (26) is formed in the peripheral wall of the cavity of the protective cover (18), and the seat buffer piece, the inner connecting pipe (4), the upper sealing sleeve (8), the lower sealing sleeve (13) and the protective cover (18) are of hollow annular structures; the inner connecting pipe (4) is connected with the protective cover (18) through a first screw (5), a sealing gasket (6) is arranged at the joint of the inner connecting pipe (4) and the upper sealing sleeve (8), the upper sealing sleeve (8) is connected with the protective cover (18) through an upper fastening screw (7), a lower O-shaped sealing ring (9) is arranged at the joint of the inner side surface of the upper sealing sleeve (8) and the inner side surface of the lower sealing sleeve (13), an upper lip-shaped sealing ring (10) and an upper sealing flat gasket (11) are sequentially arranged at the joint of the upper sealing sleeve (8) and the end surface of the lower sealing sleeve (13), the lower sealing sleeve (13) is connected with the protective cover (18) through a lower fastening screw (12), a lower lip-shaped sealing ring (14) and a lower sealing flat gasket (15) are sequentially arranged at the joint of the end surface of the lower sealing sleeve (13) and the blocking head (16), the blocking head (16) is fixed through a cotter pin (17), and a blocking head falling cavity (27) is arranged at the bottom of a cavity of the protective cover (18). The guide head (20) is connected with the protective cover (18) through a second screw (19), wherein the guide head (20) has a bullet structure in appearance; the vent holes (26) are strip holes, wherein the strip holes are uniformly arranged along the axial direction of the blanking plug.
2. A buffered velocity string plug according to claim 1, wherein: the seat ware bolster includes fishing head (21), spring pin (22), spring (23), seat ware core bar (24) and cushion collar (25), and wherein fishing head (21) lower extreme passes through the screw thread and is connected with seat ware core bar (24), spring (23) cover is located and is located seat ware core bar (24) outside, and wherein spring (23) upper end is fixed in on fishing head (21) through spring pin (22), seat ware core bar (24) lower extreme and cushion collar (25) are connected, and wherein cushion collar (25) lower extreme suit is in inscription pipe (4) upper end inside.
3. A buffered velocity string plug according to claim 2, wherein: the inner connecting pipe is characterized in that a rolling groove (2) is formed in the upper side of the inner connecting pipe (4) along the circumference, the rolling groove (2) is matched with the speed pipe column (1), an upper O-shaped sealing ring (3) is sleeved on the outer wall of the upper side of the inner connecting pipe (4), and the upper O-shaped sealing ring (3) is used for sealing the speed pipe column (1) and the inner connecting pipe (4).
4. A buffered velocity string plug according to claim 1, wherein: the cross section of the upper lip type sealing ring (10) and the lower lip type sealing ring (14) along the axial direction is of a human-shaped structure, wherein an opening of the human-shaped structure faces downwards, the upper lip type sealing ring (10) and the lower lip type sealing ring (14) are extension arms with two tail parts connected, and the extension arms can be compressed to seal under pressure.
5. A buffered velocity string plug according to claim 1, wherein: the upper end of the blocking head (16) is sleeved inside the lower sealing sleeve (13), wherein the lower end of the blocking head (16) is provided with a blocking head stretching wing, and the size of the blocking head stretching wing is larger than that of a hollow hole of the lower sealing sleeve (13).
6. A method of using the buffered velocity string plug of claim 5, wherein: the method comprises the following steps:
step 1): the method comprises the steps of removing a seat buffer part of a blanking plug, connecting one side of the blanking plug, which is provided with a rolling groove (2), with the lower end of a speed string (1) through rolling, pulling out a tail pin (17), then, lowering the blanking plug into a well shaft of a gas well along with the speed string (1), and blocking the inside of the speed string (1) by using the blanking plug to prevent gas in the well shaft from being produced along the speed string (1);
step 2): after the speed pipe column (1) is sealed and suspended at the wellhead, introducing high-pressure gas in a gas well casing into the speed pipe column (1), then carrying out annular production with a crude oil pipe by using the speed pipe column (1), so that pressure difference is generated between the upper part and the lower part of a plugging head (16) of the plugging device, and further, a plugging head stretching wing of the plugging head (16) is knocked out, the plugging head (16) falls into a plugging head falling cavity (27) due to gravity, then, draining and producing gas by adopting the speed pipe column (1), removing accumulated liquid of a shaft, and recovering normal production of the gas well;
step 3): when the gas well enters the later stage and the speed pipe column (1) cannot normally drain and produce gas, a seat buffer piece can be put into the speed pipe column (1) from a wellhead, the lower end of the seat buffer piece is sleeved in the inner connecting pipe (4), then a plunger is put into the inner connecting pipe, and the seat buffer piece is provided with a salvaging head (21), a buffer spring (23), a seat core rod (24) and a buffer sleeve (25), so that the buffer spring (23) is naturally compressed due to the gravity of the plunger, the function of buffering the plunger is achieved, the seat core rod (24) is used for bearing the plunger, and then the plunger gas lift, the drainage and the gas production are carried out in the speed pipe column (1), so that accumulated liquid in a shaft is removed, and the gas well is restored to normal production again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210780.7A CN109296333B (en) | 2018-10-17 | 2018-10-17 | Buffer type speed pipe column plug and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210780.7A CN109296333B (en) | 2018-10-17 | 2018-10-17 | Buffer type speed pipe column plug and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109296333A CN109296333A (en) | 2019-02-01 |
| CN109296333B true CN109296333B (en) | 2023-09-26 |
Family
ID=65163039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811210780.7A Active CN109296333B (en) | 2018-10-17 | 2018-10-17 | Buffer type speed pipe column plug and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109296333B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691843B (en) * | 2019-03-11 | 2022-03-29 | 中国石油天然气股份有限公司 | Oil pipe plug |
| CN110439499B (en) * | 2019-09-05 | 2024-07-02 | 陕西臻易石油技术有限公司 | Corrosion inhibition soluble type blanking plug applicable to end part of speed pipe column and removing method thereof |
| CN111058803B (en) * | 2019-12-16 | 2023-08-22 | 中国石油天然气股份有限公司 | Plunger gas lift drainage gas production device for combined pipe column and drainage gas production method thereof |
| CN116641682B (en) * | 2023-07-26 | 2023-09-29 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296943A (en) * | 2011-07-29 | 2011-12-28 | 中国石油天然气股份有限公司 | Plunger tool for liquid drainage and gas production of gas well |
| CN102808607A (en) * | 2011-06-01 | 2012-12-05 | 中国石油天然气股份有限公司 | Plunger device for gas well online measurement and plunger liquid drainage and gas production system |
| CN103470208A (en) * | 2013-08-21 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Recyclable run-in-hole blockage tool for oil and gas field |
| AU2012388733A1 (en) * | 2012-08-31 | 2015-03-12 | Halliburton Energy Services, Inc. | Electronic rupture discs for interventionless barrier plug |
| CN104879086A (en) * | 2015-06-02 | 2015-09-02 | 安东石油技术（集团）有限公司 | Packer and fishing tool |
| CN107701154A (en) * | 2017-10-26 | 2018-02-16 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN108301801A (en) * | 2018-04-13 | 2018-07-20 | 江苏省金峰石油机械制造有限公司 | Steel wire rope conveying-type blanking plug |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7392851B2 (en) * | 2004-11-04 | 2008-07-01 | Schlumberger Technology Corporation | Inflatable packer assembly |
-
2018
- 2018-10-17 CN CN201811210780.7A patent/CN109296333B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808607A (en) * | 2011-06-01 | 2012-12-05 | 中国石油天然气股份有限公司 | Plunger device for gas well online measurement and plunger liquid drainage and gas production system |
| CN102296943A (en) * | 2011-07-29 | 2011-12-28 | 中国石油天然气股份有限公司 | Plunger tool for liquid drainage and gas production of gas well |
| AU2012388733A1 (en) * | 2012-08-31 | 2015-03-12 | Halliburton Energy Services, Inc. | Electronic rupture discs for interventionless barrier plug |
| CN103470208A (en) * | 2013-08-21 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Recyclable run-in-hole blockage tool for oil and gas field |
| CN104879086A (en) * | 2015-06-02 | 2015-09-02 | 安东石油技术（集团）有限公司 | Packer and fishing tool |
| CN107701154A (en) * | 2017-10-26 | 2018-02-16 | 中国石油天然气股份有限公司 | Plunger for gas lift |
| CN108301801A (en) * | 2018-04-13 | 2018-07-20 | 江苏省金峰石油机械制造有限公司 | Steel wire rope conveying-type blanking plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109296333A (en) | 2019-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109296333B (en) | Buffer type speed pipe column plug and use method thereof | |
| CN103670337B (en) | Split plunger device for continuous production without closing well | |
| CN107620583B (en) | Liquid-drainage gas production string and production method thereof | |
| CN104213861A (en) | Expansion tube expansion technological method and tool system | |
| CN103089193A (en) | Tail pipe completion method by plugging expandable casing on top of screen pipe | |
| CN204327048U (en) | A kind of relief valve and use the Flushing tubular column of this relief valve | |
| RU80189U1 (en) | CATCHER | |
| CN106050178B (en) | A kind of drilling tool is salvaged and uses steel wire rope pusher | |
| CN110984891A (en) | Horizontal well downhole throttling process pipe column and method | |
| RU168316U1 (en) | DRILLING PUMP UNIT FOR OPERATIONAL COLUMNS OF SMALL DIAMETER | |
| CN205135516U (en) | Coiled tubing hanger is used in gas well exploitation | |
| CN204703811U (en) | Sand-proof hanger | |
| CN204371242U (en) | Plunger gas lift buffer in pit | |
| CN208502733U (en) | A kind of retrievable storm valve opening tool | |
| CN203230365U (en) | Anchoring device in oil pipe | |
| CN208669280U (en) | A kind of coiled tubing built-in pneumatic water drainage gas production device | |
| CN105888593B (en) | A kind of steel wire rope feeder | |
| CN209212197U (en) | Combined fishing cone device | |
| CN205445530U (en) | Can drop into formula of returning out well head protector | |
| CN216110617U (en) | Filter fishing device in ground soaking process drill hole | |
| CN204984324U (en) | Sucker rod fisher that oil field inside lining oil pipe used | |
| CN202544788U (en) | Elastic rope retainer | |
| CN215485965U (en) | Coal bed gas well diaphragm pump production string | |
| CN2534360Y (en) | Downhole mechanical fishing spear | |
| CN212867448U (en) | Diameter-variable stabilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |