CN113530471A - Spring steel centralizer - Google Patents
Spring steel centralizer Download PDFInfo
- Publication number
- CN113530471A CN113530471A CN202010292829.9A CN202010292829A CN113530471A CN 113530471 A CN113530471 A CN 113530471A CN 202010292829 A CN202010292829 A CN 202010292829A CN 113530471 A CN113530471 A CN 113530471A
- Authority
- CN
- China
- Prior art keywords
- spring steel
- centralizer
- fixing disc
- notches
- steel sheet
- 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
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- 229910000639 Spring steel Inorganic materials 0.000 title claims abstract description 51
- 238000000926 separation method Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006467 substitution reaction 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1042—Elastomer protector or centering means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Springs (AREA)
Abstract
The invention discloses a spring steel centralizer, and relates to the technical field of instruments and equipment such as oil drilling or well cementation, well logging and the like. The spring steel sheet in this application has certain deformability, can reduce the radial impact force that the centralizer received, and the spring steel centralizer is split type moreover, and the later stage of being convenient for is to the maintenance and the change of centralizer.
Description
Technical Field
The invention relates to the technical field of equipment for petroleum drilling or well cementation, well logging and the like, in particular to a spring steel centralizer.
Background
The centering degree of the casing or the instrument in the well hole is one of determinants of the well cementation or the well logging quality of the oil and gas well, and the placement of the centralizer is the basis of the centering or not of the casing or the instrument. Centralizers are components used to centralize, ensure concentricity of, and within, a casing or instrument in a wellbore. The performance of centralizers of different types has different influences on the setting-in and final centering degree of a casing or an instrument, the existing centralizer has the problems that a working rib plate is easy to permanently deform after being subjected to large load, the resetting force of an elastic casing centralizer is insufficient, the centering degree of the casing or the instrument in a well bore is insufficient during well cementation or logging, the well cementation or logging quality is reduced, serious consequences such as failure of well cementation or logging, inaccuracy of oil-gas series layers and data and the like can be caused when the eccentricity is too large, the deformed centralizer cannot be reused, and the cost is high.
Disclosure of Invention
The invention provides a spring steel centralizer, aiming at solving the problem that the reset force of an elastic sleeve centralizer is insufficient due to the fact that a working rib plate of the centralizer is easy to permanently deform after being subjected to a large load in the prior art.
The specific technical scheme is as follows:
a spring steel centralizer comprises a centralizer body, wherein the centralizer body is cylindrical and hollow, an upper fixing disc is fixedly arranged on the upper surface of the centralizer body, a lower fixing disc is fixedly arranged on the lower surface of the centralizer body, a plurality of notches a are uniformly arranged on the upper fixing disc at intervals along the edge, a plurality of grooves b are uniformly arranged on the lower fixing disc at intervals along the edge, the notches a and the grooves b are arranged in a one-to-one correspondence manner, a plurality of spring steel sheets are arranged on the outer portion of the centralizer body, the upper ends and the lower ends of the spring steel sheets are respectively and correspondingly arranged in the notches a and the grooves b, an upper outer ring is arranged at the upper end of the centralizer body and sleeved on the outer portion of the upper fixing disc, a lower outer ring is arranged at the lower end of the centralizer body and sleeved on the outer portion of the lower fixing disc, a plurality of fixing holes a are correspondingly arranged on the surfaces of the upper outer ring and the upper fixing disc, the surface of the lower outer ring and the surface of the lower fixing disc are correspondingly provided with a plurality of fixing holes b, bolt assemblies are arranged in the fixing holes a and the fixing holes b, the fixing holes a are arranged between the two notches a, and the fixing holes b are arranged between the two grooves b.
Preferably, the upper fixed disk is provided with six notches a, and the lower fixed disk is provided with six grooves b at even intervals along the edge.
Preferably, a stop block is arranged at the notch a, and the top end of the spring steel sheet is abutted against the stop block.
Preferably, the length of the stop block is not less than the width of the spring steel sheet.
Preferably, perpendicular separation blade is provided with on the top both sides of spring steel sheet, perpendicular separation blade and spring steel sheet integrated into one piece, perpendicular separation blade sets up between last fixed disk and the upper outer loop, and offsets with the upper fixed disk lower surface.
Compared with the prior art, the invention has the following beneficial effects:
(1) the centralizer that this application provided includes a plurality of spring steel pieces, and in the centralizer use, the spring steel piece has certain deformability, can reduce the radial impact force that the centralizer received, has guaranteed the restoring force of spring housing centralizer, has further guaranteed well cementation or logging quality.
(2) The utility model provides a centralizer includes a plurality of spring steel pieces, and spring steel piece and centralizer body are split type, receive permanent deformation back when spring steel piece, can just maintain and change spring steel piece, can further practice thrift manufacturing cost to centralizer reuse.
Drawings
FIG. 1 is a front view of a spring steel centralizer of the present invention;
FIG. 2 is a schematic view of the connection between the upper fixing disk and the fixed outer ring of the spring steel centralizer according to the present invention;
FIG. 3 is a schematic view showing the connection between the upper fixing disk and the fixed outer ring in embodiment 2 of the spring steel centralizer of the present invention;
FIG. 4 is a top view of a spring steel plate of example 3 of a spring steel centralizer of the present invention.
In the figure, 1-a centralizer body, 2-an upper fixed disc, 3-a notch a, 4-a spring steel disc, 5-an upper outer ring, 6-a lower outer ring, 7-a fixed hole a, 8-a fixed hole b, 9-a stop block and 10-a stop piece.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1: the invention discloses a spring steel centralizer, as shown in figure 1, which comprises a centralizer body 1, wherein the centralizer body 1 is a cylinder and is hollow, an upper fixing disc 2 is fixedly arranged on the upper surface of the centralizer body 1, a lower fixing disc is fixedly arranged on the lower surface of the centralizer body 1, a plurality of notches a3 are uniformly arranged at intervals along the edge of the upper fixing disc 2, a plurality of grooves b are uniformly arranged at intervals along the edge of the lower fixing disc, the notches a3 and the grooves b are arranged in a one-to-one correspondence manner, a plurality of spring steel sheets 4 are arranged outside the centralizer body 1, the upper end and the lower end of each spring steel sheet 4 are respectively and correspondingly arranged in the notches a3 and the grooves b, an upper outer ring 5 is arranged at the upper end of the centralizer body 1, the upper outer ring 5 is sleeved outside the upper fixing disc 2, a lower outer ring 6 is arranged at the lower end of the centralizer body 1, the lower outer ring 6 is sleeved outside the lower fixing disc, a plurality of fixing holes a7 are correspondingly arranged on the surfaces of the upper outer ring 5 and the upper fixing disc 2, the lower outer ring 6 and the lower fixing disc are correspondingly provided with a plurality of fixing holes b8, bolt assemblies are arranged in the fixing holes a7 and the fixing holes b8, the fixing holes a7 are arranged between the two notches a3, and the fixing holes b8 are arranged between the two grooves b. The spring steel sheet 4 is arranged in the notch a3 and the groove b and is arranged outside the upper fixed disc 2 through a fixed outer ring, and the spring steel sheet 4 has certain deformation capacity in the well cementation process. Preferably, the upper fixing plate 2 is provided with six notches a3, and the lower fixing plate is provided with six grooves b at even intervals along the edge.
Example 2: in example 1, as shown in fig. 3, a stopper 9 is provided in the notch a3, and the tip end of the spring steel sheet 4 abuts against the stopper 9. The length of the stop 9 is not less than the width of the spring steel sheet 4. The arrangement of the stop block 9 can prevent the spring steel sheet 4 from being extruded out of the notch a3 in the stress process, and the normal use of the spring steel centralizer can be ensured.
Example 3: on the basis of embodiment 1, as shown in fig. 4, vertical blocking pieces 10 are arranged on two sides of the top end of the spring steel sheet 4, the vertical blocking pieces 10 are integrally formed with the spring steel sheet 4, and the vertical blocking pieces 10 are arranged between the upper fixed disk 2 and the upper outer ring 5 and abut against the lower surface of the upper fixed disk 2. The width of the upper end of the spring steel sheet 4 is larger than that of the notch a3, so that the spring steel sheet 4 can be prevented from being extruded out of the notch a3 in the stress process, and the normal use of the spring steel centralizer is further ensured.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (5)
1. The utility model provides a spring steel centralizer which characterized in that: the centralizer is characterized by comprising a centralizer body, wherein the centralizer body is a cylinder and is hollow inside, an upper fixing disc is fixedly arranged on the upper surface of the centralizer body, a lower fixing disc is fixedly arranged on the lower surface of the centralizer body, a plurality of notches a are uniformly arranged along the edge of the upper fixing disc at intervals, a plurality of grooves b are uniformly arranged along the edge of the lower fixing disc at intervals, the notches a and the grooves b are arranged in a one-to-one correspondence manner, a plurality of spring steel sheets are arranged outside the centralizer body, the upper end and the lower end of each spring steel sheet are respectively and correspondingly arranged in the notches a and the grooves b, an upper outer ring is arranged at the upper end of the centralizer body and sleeved outside the upper fixing disc, a lower outer ring is arranged at the lower end of the centralizer body and sleeved outside the lower fixing disc, a plurality of fixing holes a are correspondingly arranged on the surfaces of the upper outer ring and the upper fixing disc, and a plurality of fixing holes b are correspondingly arranged on the surfaces of the lower outer ring and the lower fixing disc, bolt assemblies are arranged in the fixing holes a and the fixing holes b, the fixing holes a are arranged between the two notches a, and the fixing holes b are arranged between the two grooves b.
2. The spring steel centralizer of claim 1, wherein: the upper fixed disk is provided with six notches a, and the lower fixed disk is provided with six grooves b at even intervals along the edge.
3. The spring steel centralizer of claim 2, wherein: and a stop block is arranged at the notch a, and the top end of the spring steel sheet is abutted against the stop block.
4. A spring steel centralizer according to claim 3, wherein: the length of the stop block is not less than the width of the spring steel sheet.
5. The spring steel centralizer of claim 2, wherein: the spring steel sheet top both sides are provided with perpendicular separation blade, perpendicular separation blade and spring steel sheet integrated into one piece, perpendicular separation blade sets up between last fixed disk and upper outer loop, and offsets with the upper fixed disk lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292829.9A CN113530471A (en) | 2020-04-15 | 2020-04-15 | Spring steel centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292829.9A CN113530471A (en) | 2020-04-15 | 2020-04-15 | Spring steel centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113530471A true CN113530471A (en) | 2021-10-22 |
Family
ID=78088205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010292829.9A Pending CN113530471A (en) | 2020-04-15 | 2020-04-15 | Spring steel centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113530471A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100018698A1 (en) * | 2008-07-25 | 2010-01-28 | Stephen Randall Garner | Tubing centralizer |
| CN206668173U (en) * | 2017-04-13 | 2017-11-24 | 廖少波 | A kind of casing centralizer for directional well |
| CN208330219U (en) * | 2018-06-06 | 2019-01-04 | 黑龙江兰德超声科技股份有限公司 | A kind of array induction centralizer |
| CN212105781U (en) * | 2020-04-15 | 2020-12-08 | 扬州市江都区人和机械有限公司 | Spring steel centralizer |
-
2020
- 2020-04-15 CN CN202010292829.9A patent/CN113530471A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100018698A1 (en) * | 2008-07-25 | 2010-01-28 | Stephen Randall Garner | Tubing centralizer |
| CN206668173U (en) * | 2017-04-13 | 2017-11-24 | 廖少波 | A kind of casing centralizer for directional well |
| CN208330219U (en) * | 2018-06-06 | 2019-01-04 | 黑龙江兰德超声科技股份有限公司 | A kind of array induction centralizer |
| CN212105781U (en) * | 2020-04-15 | 2020-12-08 | 扬州市江都区人和机械有限公司 | Spring steel centralizer |
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