CN112177563A - Well completion method - Google Patents
Well completion method Download PDFInfo
- Publication number
- CN112177563A CN112177563A CN201910584973.7A CN201910584973A CN112177563A CN 112177563 A CN112177563 A CN 112177563A CN 201910584973 A CN201910584973 A CN 201910584973A CN 112177563 A CN112177563 A CN 112177563A
- Authority
- CN
- China
- Prior art keywords
- well
- wall
- oil pipe
- tubing
- completing
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 238000005553 drilling Methods 0.000 claims description 18
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention provides a well completion method, which comprises the steps of simulating drifting; secondly, feeding the well wall supporting oil pipe assembly into the well shaft to support the well wall; step three, production is carried out; and fourthly, sidetracking the supporting oil pipe assembly, wherein in the second step, the supporting oil pipe assembly is made of an aluminum alloy material, and the well completion method can be used for lowering the supporting sleeve assembly into the shaft to support the shaft, so that the shaft wall is prevented from collapsing, and the normal safe production is ensured.
Description
Technical Field
The invention relates to the technical field of underground construction of oil and gas wells, in particular to a well completion method.
Background
And part of the oil field adopts an open hole completion mode. However, in the open hole production process, the well wall is easy to collapse due to factors such as improper production differential pressure control, incomplete sealing of a mudstone section by oil layer casing cementing, and post-measure operation. And the collapse of the well wall brings great harm to the normal production of the oil-gas well, and can cause the production stop of the oil-gas well, the blocking and burying of the pipe column and the serious damage to ground equipment and downhole tools.
Thus, there is a need to invent a method of completing a well to avoid or reduce borehole wall collapse.
Disclosure of Invention
The present invention is directed to a method of completing a well that addresses some or all of the above-described problems with the prior art. The well completion method can put the supporting sleeve component into the shaft to support the shaft, so that the collapse of the shaft wall is avoided, and the normal safe production is ensured.
According to the present invention, there is provided a method of completing a well, comprising:
step one, simulating a drifting,
step two, the well wall supporting oil pipe assembly is conveyed into the well shaft to support the well wall,
step three, carrying out the production,
step four, sidetrack the supporting oil pipe assembly,
in the second step, the support oil pipe assembly is made of an aluminum alloy material.
In one embodiment, the aluminum alloy material comprises the following components in percentage by mass: cu: 4.62 percent; mg: 0.49 percent; ag: 0.56 percent; mn: 0.32 percent; zr: 0.14 percent; the balance being Al.
In one embodiment, the inner wall of the support oil pipe assembly is coated with silver, and the thickness of the silver coating is 7-13 mu.
In one embodiment, the support tubing assembly has tubing threaded, a first step surface is provided on an outer wall of the tubing of the threaded outer section for mating with a second step surface provided on an inner wall of the tubing of the inner section, and a seal is provided between the outer wall of the tubing outside the outer section and the inner wall of the tubing inside the inner section.
In one embodiment, a third step surface is provided on the inner wall of the oil pipe of the internal thread section to form a metal seal with the end surface of the oil pipe of the external thread section.
In one embodiment, in step one, a drift gauge for drifting is lowered into the wellbore by a drilling tool, the drilling tool is rotated to forcibly workover the well during a blockage, and the drilling tool carries the drift gauge up and down in a plurality of repeated movements.
In one embodiment, the drift size gauge has:
a cylindrical drift size body, wherein the outer wall of the drift size body is provided with a spiral groove,
a conical end arranged at the lower end of the body,
a first alloy tooth disposed on an outer wall of the tip,
a second alloy tooth disposed in the helical groove.
In one embodiment, a plurality of the second alloy teeth are distributed at intervals along the extension direction of the spiral groove, and a plurality of the first alloy teeth are distributed at intervals along the circumferential direction of the tip.
In one embodiment, in step two, the velocity of the support tubing assembly is not greater than 0.2 m/s.
In one embodiment, in step four, during sidetracking, 18-22KN is pressed down and the rate of penetration is set at 45-55 r/min.
Compared with the prior art, the well completion method has the advantages that the supporting sleeve assembly is arranged in the well casing for supporting the well casing, so that the collapse of the well wall can be avoided, the safe production is ensured, and the sidetrack drilling can be carried out to form a new well hole at the later stage of the production.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 illustrates a support tubing assembly run in accordance with one embodiment of the present invention;
FIG. 2 shows a connection diagram of adjacent oil pipes according to one embodiment of the present invention;
FIG. 3 shows a drift size gauge according to one embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
In the well completion, first, a simulated drifting is performed to smoothly lower the support tubing assembly 3. In the drifting process, the drifting gauge 4 is lowered through a drilling tool, and repeated up-and-down movement is performed for multiple times to achieve drifting, so that the wall of the well is smooth. After the well is opened, the drilling tool is lifted, and slurry is replenished into the well bore during the lifting process of the drilling tool so as to balance the formation pressure. Particularly, in the drifting process, when the open hole is blocked, the drilling tool can be rotated to forcibly trim the well wall, so that the permeability of the well hole is ensured.
For example, the drifting operation may be performed by a drift pattern 4 as shown in FIG. 3. As shown in fig. 3, the drift 4 has a drift body 41, a head 42, first alloy teeth 43, and second alloy teeth 44. The main body 41 is cylindrical, and a spiral groove 45 is provided on an outer wall of the main body 41. The tip 42 is provided at the lower end of the body 41, is tapered itself, and gradually decreases in cross-sectional area in the top-down direction. The first alloy teeth 43 are provided on the outer wall of the tip 42. The first alloy teeth 43 are circumferentially spaced along the tip 42 and are axially arranged in sets of first alloy teeth 43. When the first alloy teeth 43 are subjected to obstruction drilling, forced well repair can be well carried out, and the well repair efficiency is improved. And, the second alloy tooth 44 is provided in the spiral groove 45. The second alloy teeth 44 are strip-shaped, and the strip-shaped second alloy teeth 44 are distributed at intervals along the extending direction of the spiral groove 45. For example, the groove width of the spiral groove 45 is 15cm, and the groove depth is 5 mm. The drift gauge 4 has a helical groove 45 running around the outer wall of the body 41 over a length of one meter. The spiral groove 45 is embedded with the second alloy teeth 44 within the length range of one meter to cover 1/4 spiral circumference.
The wall support tubing assembly 3 is then run into the wellbore to support the wall of the wellbore. As shown in fig. 1, tubing assembly 3 is run into the wellbore by a drilling tool. During running, a releasing tool 1 is arranged at the upper end of the oil pipe assembly 3 so as to perform releasing operation. When the drilling tool is lowered, the lowering speed is controlled strictly and stably. Preferably, the lowering speed cannot exceed 0.2 m/s. After lowering the tubing assembly 3 downhole, a slurry replacement operation is required to replace the mud in the wellbore. Then, the releasing operation is carried out by observing the change of the suspended weight. After the releasing is successful, the drilling tool is lifted, and slurry is timely supplemented into the oil pipe assembly 3 in the drilling process so as to balance the formation pressure and prevent blowout.
In one embodiment, the oil tube assembly 3 is made of an aluminum alloy material. The material has low hardness and is easy to drill and remove. For example, the aluminum alloy material comprises the following components in percentage by mass: cu: 4.62 percent; mg: 0.49 percent; ag: 0.56 percent; mn: 0.32 percent; zr: 0.14 percent; the balance being Al. The oil pipe component 3 made of the aluminum alloy material has excellent high-temperature tensile resistance, and tests show that the internal pressure resistance is more than 50MPa, the tensile strength is more than 60T, and the oil pipe component can meet the construction requirements of different working conditions.
Preferably, a silver coating is electrolytically applied to the inner wall of the tubing assembly 3. Further preferably, the silver coating has a thickness of 7-13 μ, for example 10 μ. By the arrangement, the corrosion resistance of the oil pipe assembly 3 is improved, and the oil pipe assembly can work in an environment with high temperature of 150 ℃ and 20% hydrochloric acid.
In one embodiment, the support tubing assembly 3 is formed from a plurality of individual tubing 31, as shown in FIG. 2. And, the oil pipe 31 is screwed. This connection ensures that the tubing assembly 3 is lowered smoothly into the wellbore. The outer wall of the external thread section in threaded connection is provided with a first step surface 32, and meanwhile, the second step surface 33 on the inner wall of the internal thread section is matched with the first step surface 32, so that the connection process can be better limited, and the connection is convenient to carry out. A sealing ring 34 is provided between the outer wall of the oil pipe 31 outside the external thread section and the inner wall of the oil pipe 31 inside the internal thread section for ensuring sealing between the two connecting oil pipes 31. In addition, a third step surface 35 is arranged on the inner wall of the oil pipe 31 of the internal thread section to form a metal seal with the end surface of the external thread section. The sealing mode can ensure that liquid cannot enter the inner cavity of the oil pipe 31 particularly in the acid fracturing construction process, so that the oil pipe 31 is prevented from being corroded. Oil pipe assembly 3 through this application has not the acid corrosion during the wall of a well acid fracturing, and the production later stage is easily bored, alleviates the workover degree of difficulty, reduces advantages such as workover cost.
Then, acid pressing and production are carried out.
Finally, at a later stage of production if water is present or no production is available, the set of lower drill bits sidetrack the tubing assembly 3 to form a new wellbore. For example, during sidetracking, 18-22KN is pressed down and the rate of penetration is set at 45-55 r/min. The oil pipe assembly 3 arranged in the above way has the advantage of easy drilling and removing.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of completing a well, comprising:
step one, simulating a drifting,
step two, the well wall supporting oil pipe assembly is conveyed into the well shaft to support the well wall,
step three, carrying out the production,
step four, sidetrack the supporting oil pipe assembly,
in the second step, the support oil pipe assembly is made of an aluminum alloy material.
2. The well completion method according to claim 1, wherein the aluminum alloy material comprises the following components in percentage by mass: cu: 4.62 percent; mg: 0.49 percent; ag: 0.56 percent; mn: 0.32 percent; zr: 0.14 percent; the balance being Al.
3. A method of completing a well according to claim 1 or 2 wherein the inner wall of the support tubing assembly is silver coated and the silver coating has a thickness of 7-13 μ.
4. A method of completing a well according to claim 2 or 3 wherein the support tubing assembly has tubing threaded, the threaded outer threaded section having a first step surface on an outer wall of the tubing for engaging a second step surface on an inner wall of the tubing for the inner threaded section, and a sealing ring is provided between the outer wall of the tubing outside the outer threaded section and the inner wall of the tubing inside the inner threaded section.
5. A method of completing a well according to claim 4 wherein a third step surface is provided on the inner wall of the oil pipe of the internal thread section to form a metal seal with the end surface of the oil pipe of the external thread section.
6. A method of completing a well according to any one of claims 1 to 5 wherein in step one a drift gauge for drifting is lowered into the wellbore by a drilling tool, the drilling tool is rotated to forcibly workover the well during a blockage, and the drilling tool carries the drift gauge up and down a plurality of times.
7. A well completion method according to claim 6 wherein the drift size has:
a cylindrical drift size body, wherein the outer wall of the drift size body is provided with a spiral groove,
a conical end arranged at the lower end of the body,
a first alloy tooth disposed on an outer wall of the tip,
a second alloy tooth disposed in the helical groove.
8. A method of completing a well according to claim 7 wherein a plurality of said second alloy teeth are spaced along the direction of elongation of the helical groove and a plurality of said first alloy teeth are spaced circumferentially along said tip.
9. A completion method according to any of claims 1 to 8, wherein in step two the velocity of the run in of the support tubing assembly is not greater than 0.2 m/s.
10. A method of completing a well according to any of the claims 1 to 9 wherein in step four during sidetracking 18-22KN is pressed down and the drilling rate is set at 45-55 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584973.7A CN112177563A (en) | 2019-07-01 | 2019-07-01 | Well completion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910584973.7A CN112177563A (en) | 2019-07-01 | 2019-07-01 | Well completion method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112177563A true CN112177563A (en) | 2021-01-05 |
Family
ID=73914675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910584973.7A Pending CN112177563A (en) | 2019-07-01 | 2019-07-01 | Well completion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112177563A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2881071Y (en) * | 2005-09-05 | 2007-03-21 | 杨相杰 | Multipurpose well pigging gauge |
| CN101432499A (en) * | 2006-02-17 | 2009-05-13 | 诺尔斯海德公司 | Gas tight tubular joint or connection |
| CN201495994U (en) * | 2009-07-20 | 2010-06-02 | 吐哈石油勘探开发指挥部 | Novel threaded oil casing |
| US20120222864A1 (en) * | 2007-11-23 | 2012-09-06 | Flo Tech Holdings Limited | Completion arrangement |
| CN102943291A (en) * | 2012-10-18 | 2013-02-27 | 中国电子科技集团公司第十研究所 | Surface treatment method for weldability and protectivity of aluminium alloy tube shell |
| CN103981410A (en) * | 2014-05-27 | 2014-08-13 | 中南大学 | High damage-resistant aluminium alloy and preparation method thereof |
| CN204002607U (en) * | 2014-07-16 | 2014-12-10 | 西安摩尔石油工程实验室有限公司 | A kind of hermetic seal oil conduit screwed connection structure with anti-metal shoulder corrosion |
| CN204163632U (en) * | 2014-10-09 | 2015-02-18 | 中国石油化工集团公司 | A kind of guiding drifting instrument |
| CN204419103U (en) * | 2015-01-30 | 2015-06-24 | 中石化石油工程技术服务有限公司 | Edge carbide button drift size gauge tool |
| CN107355185A (en) * | 2017-07-26 | 2017-11-17 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of antitorque joint of double step |
| CN107385292A (en) * | 2017-06-29 | 2017-11-24 | 中国石油天然气集团公司 | A kind of ultradeep well aluminium alloy casing pipe and its manufacture method |
| US20180223607A1 (en) * | 2017-02-06 | 2018-08-09 | Mitchell Z. Dziekonski | Toe casing |
| CN108976942A (en) * | 2018-07-26 | 2018-12-11 | 成都新柯力化工科技有限公司 | A kind of corrosion resistant method of raising chemical industry equipment graphite piece inner wall |
| CN208441818U (en) * | 2018-05-22 | 2019-01-29 | 中国石油化工股份有限公司 | For pinpointing the solvable oil pipe of acid fracturing |
-
2019
- 2019-07-01 CN CN201910584973.7A patent/CN112177563A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2881071Y (en) * | 2005-09-05 | 2007-03-21 | 杨相杰 | Multipurpose well pigging gauge |
| CN101432499A (en) * | 2006-02-17 | 2009-05-13 | 诺尔斯海德公司 | Gas tight tubular joint or connection |
| US20120222864A1 (en) * | 2007-11-23 | 2012-09-06 | Flo Tech Holdings Limited | Completion arrangement |
| CN201495994U (en) * | 2009-07-20 | 2010-06-02 | 吐哈石油勘探开发指挥部 | Novel threaded oil casing |
| CN102943291A (en) * | 2012-10-18 | 2013-02-27 | 中国电子科技集团公司第十研究所 | Surface treatment method for weldability and protectivity of aluminium alloy tube shell |
| CN103981410A (en) * | 2014-05-27 | 2014-08-13 | 中南大学 | High damage-resistant aluminium alloy and preparation method thereof |
| CN204002607U (en) * | 2014-07-16 | 2014-12-10 | 西安摩尔石油工程实验室有限公司 | A kind of hermetic seal oil conduit screwed connection structure with anti-metal shoulder corrosion |
| CN204163632U (en) * | 2014-10-09 | 2015-02-18 | 中国石油化工集团公司 | A kind of guiding drifting instrument |
| CN204419103U (en) * | 2015-01-30 | 2015-06-24 | 中石化石油工程技术服务有限公司 | Edge carbide button drift size gauge tool |
| US20180223607A1 (en) * | 2017-02-06 | 2018-08-09 | Mitchell Z. Dziekonski | Toe casing |
| CN107385292A (en) * | 2017-06-29 | 2017-11-24 | 中国石油天然气集团公司 | A kind of ultradeep well aluminium alloy casing pipe and its manufacture method |
| CN107355185A (en) * | 2017-07-26 | 2017-11-17 | 无锡西姆莱斯石油专用管制造有限公司 | A kind of antitorque joint of double step |
| CN208441818U (en) * | 2018-05-22 | 2019-01-29 | 中国石油化工股份有限公司 | For pinpointing the solvable oil pipe of acid fracturing |
| CN108976942A (en) * | 2018-07-26 | 2018-12-11 | 成都新柯力化工科技有限公司 | A kind of corrosion resistant method of raising chemical industry equipment graphite piece inner wall |
Non-Patent Citations (1)
| Title |
|---|
| 王玎珂: "易钻磨防砂筛管在塔河油田的研制与应用", 《中外能源》 * |
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Application publication date: 20210105 |