CN113638708A - Thermal oil production pipe anchor - Google Patents
Thermal oil production pipe anchor Download PDFInfo
- Publication number
- CN113638708A CN113638708A CN202111018975.3A CN202111018975A CN113638708A CN 113638708 A CN113638708 A CN 113638708A CN 202111018975 A CN202111018975 A CN 202111018975A CN 113638708 A CN113638708 A CN 113638708A
- Authority
- CN
- China
- Prior art keywords
- tube
- pipe
- oil
- flexible pipe
- hole
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000002775 capsule Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 12
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000000034 method Methods 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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)
- Joints Allowing Movement (AREA)
Abstract
The invention provides a thermal oil production pipe anchor. Relates to the technical field of oil field downhole tools. The upper part of the central tube is in threaded sealing connection with the mounting tube, the middle part of the central tube is provided with a piston, a piston sleeve and a liquid inlet hole, and a slip, a baffle ring and a spring are arranged between a lower cone body at the upper part of the piston and an upper cone body at the lower part of the mounting tube; the lower part of the central tube is connected with the lower joint through a telescopic tube, and the upper part of the mounting tube is connected with the upper joint through a telescopic tube. The invention has the following beneficial effects: the invention utilizes the large linear thermal expansion rate of mercury metal, compensates the length of the heated extension of the oil pipe column during the thermal recovery of the thick oil by reversely pushing the mercury metal along with the temperature change and the volume change, and solves the problems that the oil pipe column is pressed and bent during the thermal recovery of the thick oil, so that the mechanical loss of an oil extraction lifting device is large, the unit efficiency is low, the sucker rod and the oil pipe are abraded too fast and the like by utilizing the characteristics of different metals with different thermal expansion coefficients.
Description
The technical field is as follows:
the invention relates to the technical field of oil field downhole tools, in particular to a thermal oil production pipe anchor.
Background art:
in the oil exploitation process, the tubing anchor is a necessary tool, the function of the tubing anchor is to fix the tubing string on the well wall to prevent the tubing string from rotating, at present, after most of the tubing anchors are anchored, the tubing string cannot move up and down, and when thick oil is thermally exploited, the tubing anchor can cause some problems: during thermal recovery, the oil pipe column is heated and extended, but the oil pipe anchor cannot move, so that the oil pipe column is directly pressed and bent, and further the problems that the mechanical loss of an oil recovery lifting device is large, the unit efficiency is low, the abrasion of a sucker rod and an oil pipe is too fast and the like are caused.
The invention content is as follows:
in order to solve the above problems, the present invention provides a thermal production tubing anchor.
The technical scheme of the invention is as follows: a thermal oil production pipe anchor comprises a central pipe, wherein the upper part of the central pipe is in threaded sealing connection with an installation pipe, a piston sleeve and a liquid inlet hole are arranged in the middle of the central pipe, and a slip, a baffle ring and a spring are arranged between a lower cone on the upper part of the piston and an upper cone on the lower part of the installation pipe;
the lower part of the central tube is connected with the lower joint through a telescopic tube, and the upper part of the mounting tube is connected with the upper joint through a telescopic tube.
The step hole I at the lower part of the central tube is connected with a step shaft of the telescopic tube through a sliding flat key, a flange at the lower part of the step shaft is in clearance fit connection with an inner hole at the lower part of the central tube, the lower end face of the central tube is connected with a gland through a bolt, a capsule is arranged in a space between the flange of the telescopic tube, the excircle of the telescopic tube, the inner hole of the central tube and the gland, and mercury metal is filled in the capsule.
The direction of a telescopic pipe connected with an installation pipe is opposite to that of a telescopic pipe connected with a central pipe, a step hole II in the upper part of the installation pipe is connected with a step shaft of the telescopic pipe through a sliding flat key, a flange in the upper part of the step shaft is in clearance fit connection with an inner hole in the upper part of the installation pipe, the upper end surface of the installation pipe is connected with a gland through a bolt, a capsule is installed in a space between the flange of the telescopic pipe, the outer circle of the telescopic pipe, the inner hole of the installation pipe and the gland, and mercury metal is filled in the capsule.
The invention has the following beneficial effects: the invention utilizes the large linear thermal expansion rate of the mercury metal, compensates the length of the heated extension of the oil pipe column during the thermal recovery of the thick oil by reversely pushing the mercury metal along with the temperature change and the volume change, when the temperature in the well rises after a thermal oil production pipe anchor is anchored in the well, the volume of mercury metal in the capsule expands to drive the lower telescopic pipe to move upwards and the upper telescopic pipe to move downwards, because the thermal expansion coefficient of the mercury metal is far larger than that of carbon steel, the sealed elastic capsule is filled with the mercury metal to compensate the linear expansion of the oil pipe caused by the temperature rise, and vice versa, the characteristic of different thermal expansion coefficients of different metals is utilized to solve the problem that the oil pipe column is pressed and bent when thick oil is thermally produced, and further causes the problems of large mechanical loss of the oil extraction lifting device, low unit efficiency, over-quick abrasion of the sucker rod and the oil pipe and the like, and does not damage the anchoring of the thermal oil extraction pipe.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention.
In the figure, 1-central tube, 2-upper joint, 3-slip, 4-baffle ring, 5-spring, 6-piston, 7-lower joint, 8-telescopic tube, 9-mounting tube, 10-gland, 11-capsule, 12-upper cone, 13-piston sleeve, 14-liquid inlet hole, 15-sliding flat key, 16-step hole I, 17-step shaft, 18-flange, 19-lower cone and 20-step hole II.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, the anchor for thermal oil production pipe comprises a central pipe 1, wherein the upper part of the central pipe 1 is connected with a mounting pipe 9 in a thread sealing manner, a piston 6, a piston sleeve 13 and a liquid inlet hole 14 are arranged in the middle of the central pipe 1, and a slip 3, a baffle ring 4 and a spring 5 are arranged between a lower cone 19 on the upper part of the piston 6 and an upper cone 12 on the lower part of the mounting pipe 9;
the lower part of the central tube 1 is connected with a lower joint 7 through a telescopic tube 8, and the upper part of the installation tube 9 is connected with an upper joint 2 through the telescopic tube 8.
The step hole I16 at the lower part of the central tube 1 is connected with the step shaft 17 of the telescopic tube 8 through a sliding flat key 15, the flange 18 at the lower part of the step shaft 17 is in clearance fit connection with the inner hole at the lower part of the central tube 1, the lower end face of the central tube 1 is connected with the gland 10 through a bolt, a capsule 11 is arranged in the space between the flange 18 of the telescopic tube 8, the excircle of the telescopic tube 8, the inner hole of the central tube 1 and the gland 10, and the capsule 11 is filled with mercury metal.
The direction of a telescopic pipe 8 connected with a mounting pipe 9 is opposite to that of a telescopic pipe 8 connected with a central pipe 1, a step hole II20 in the upper part of the mounting pipe 9 is connected with a step shaft 17 of the telescopic pipe 8 through a sliding flat key 15, a flange 18 in the upper part of the step shaft 17 is in clearance fit connection with an inner hole in the upper part of the mounting pipe 9, the upper end face of the mounting pipe 9 is connected with a gland 10 through a bolt, a capsule 11 is mounted in a space between the flange 18 of the telescopic pipe 8, the excircle of the telescopic pipe 8 and the inner hole of the mounting pipe 9 and the gland 10, and the capsule 11 is filled with mercury metal.
The telescopic pipe 8 is connected with the central pipe 1 and the mounting pipe 9 through a sliding flat key 15 to transmit torque and can move up and down for a certain distance.
The invention utilizes the large linear thermal expansion rate of the mercury metal, compensates the length of the heated extension of the oil pipe column during the thermal recovery of the thick oil by reversely pushing the mercury metal along with the temperature change and the volume change, when the temperature in the well rises after a thermal oil production pipe anchor is anchored in the well, the volume of mercury metal in the capsule expands to drive the lower telescopic pipe to move upwards and the upper telescopic pipe to move downwards, because the thermal expansion coefficient of the mercury metal is far larger than that of carbon steel, the sealed elastic capsule is filled with the mercury metal to compensate the linear expansion of the oil pipe caused by the temperature rise, and vice versa, the characteristic of different thermal expansion coefficients of different metals is utilized to solve the problem that the oil pipe column is pressed and bent when thick oil is thermally produced, and further causes the problems of large mechanical loss of the oil extraction lifting device, low unit efficiency, over-quick abrasion of the sucker rod and the oil pipe and the like, and does not damage the anchoring of the thermal oil extraction pipe.
Claims (3)
1. A thermal production tubing anchor, includes center tube (1), its characterized in that: the upper part of the central tube (1) is in threaded sealing connection with the mounting tube (9), the middle part of the central tube (1) is provided with a piston (6), a piston sleeve (13) and a liquid inlet hole (14), and a slip (3), a baffle ring (4) and a spring (5) are arranged between a lower cone (19) at the upper part of the piston (6) and an upper cone (12) at the lower part of the mounting tube (9);
the lower part of the central tube (1) is connected with a lower joint (7) through a telescopic tube (8) in a threaded sealing manner, and the upper part of the mounting tube (9) is connected with an upper joint (2) through a telescopic tube (8) in a threaded sealing manner.
2. The thermal production tubing anchor of claim 1, wherein: step hole I (16) of center tube (1) lower part connects step axle (17) of flexible pipe (8) through slip parallel key (15), flange (18) and center tube (1) lower part hole clearance fit of step axle (17) lower part are connected, terminal surface passes through bolted connection gland (10) under center tube (1), flange (18) of flexible pipe (8), the excircle of flexible pipe (8), install capsule (11) in the space between center tube (1) hole and gland (10), capsule (11) intussuseption is filled with mercury metal.
3. The thermal production tubing anchor of claim 1, wherein: the flexible pipe (8) that installation pipe (9) are connected is opposite with flexible pipe (8) direction that center tube (1) is connected, step hole II (20) on installation pipe (9) upper portion are through sliding flat key (15) step axle (17) of connecting flexible pipe (8), flange (18) and installation pipe (9) upper portion hole clearance fit on upper portion of step axle (17) are connected, bolt connection gland (10) are passed through to installation pipe (9) up end, flange (18) of flexible pipe (8), the excircle of flexible pipe (8), install capsule (11) in the space between installation pipe (9) hole and gland (10), capsule (11) intussuseption is filled with mercury metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111018975.3A CN113638708A (en) | 2021-09-01 | 2021-09-01 | Thermal oil production pipe anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111018975.3A CN113638708A (en) | 2021-09-01 | 2021-09-01 | Thermal oil production pipe anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113638708A true CN113638708A (en) | 2021-11-12 |
Family
ID=78424791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111018975.3A Withdrawn CN113638708A (en) | 2021-09-01 | 2021-09-01 | Thermal oil production pipe anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113638708A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117722141A (en) * | 2024-02-07 | 2024-03-19 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
-
2021
- 2021-09-01 CN CN202111018975.3A patent/CN113638708A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117722141A (en) * | 2024-02-07 | 2024-03-19 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
| CN117722141B (en) * | 2024-02-07 | 2024-04-26 | 大庆市瑞斯德石油机械制造有限公司 | Airtight casing nipple with special threads |
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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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20211112 |
|
| WW01 | Invention patent application withdrawn after publication |