CN116838266A - Underground casing centralizer for oilfield exploitation - Google Patents
Underground casing centralizer for oilfield exploitation Download PDFInfo
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- CN116838266A CN116838266A CN202311111757.3A CN202311111757A CN116838266A CN 116838266 A CN116838266 A CN 116838266A CN 202311111757 A CN202311111757 A CN 202311111757A CN 116838266 A CN116838266 A CN 116838266A
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- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 230000000670 limiting effect Effects 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 abstract description 19
- 238000001125 extrusion Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- 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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of centralizers, in particular to an underground casing centralizer for oil field exploitation. Including fixed cover, fixed cover rotates and is provided with the rotation cover, it has a plurality of first fixed shells and a plurality of second fixed shells to rotate lantern ring shape array rigid coupling, first fixed shell slides and is provided with first carriage, the second fixed shell slides and is equipped with the second carriage, the second carriage rotates and is provided with the support frame, the support frame be equipped with corresponding first carriage complex first spout, the support frame rigid coupling has the elastic sheet, fixed cover is equipped with dislocation mechanism, first fixed shell is equipped with shrinkage mechanism. According to the invention, the rotating sleeve is rotated through the dislocation mechanism, the extrusion of the raised stone blocks to the six elastic sheets is reduced, the elastic sheets are integrally close to the sleeve through the limiting assembly, and the deformation degree of the elastic sheets is weakened, so that the service life of the elastic sheets is prolonged.
Description
Technical Field
The invention relates to the technical field of centralizers, in particular to an underground casing centralizer for oil field exploitation.
Background
In oil extraction, it is common to install evenly distributed casing centralizers on the casing, and then place the casing into the excavated well, wherein the casing centralizers keep the casing centered in the well, and existing casing centralizers are divided into: various casing centralizers such as a rigid casing centralizer, an elastic casing centralizer, a multi-stage casing centralizer, a rotary casing centralizer and the like.
In the use process of the existing elastic sleeve centralizer, due to the fact that the side wall of a well is uneven, when the elastic sleeve centralizer passes through the area, the elastic sleeve centralizer is extruded by stones at the protruding portion of the well wall, so that the elastic sleeve centralizer is correspondingly contracted, but the deformation degree of the elastic sleeve centralizer is overlarge through the area, namely the elastic force of the elastic sleeve centralizer is overlarge, the elastic sleeve centralizer excessively extrudes the protruding stones, the protruding stones are separated from scratch sleeves, the well collapse is seriously easily caused, and the installation of the sleeves is affected.
Disclosure of Invention
The invention provides an underground casing centralizer for oilfield exploitation, which aims to solve the problem that when a centralizer encounters a large raised stone, the centralizer is easy to excessively deform and store energy, so that the centralizer collapses the raised stone.
The technical scheme of the invention is as follows: the utility model provides an oil field exploitation casing centralizer in pit, includes the fixed cover, the fixed cover rotates and is provided with the rotation cover, the array rigid coupling of rotation lantern ring shape has a plurality of first fixed shells and a plurality of second fixed shells, first fixed shell slides and is provided with first carriage, the second fixed shell slides and is provided with the second carriage, the second carriage rotates and is provided with the support frame, the support frame is equipped with first spout, the first spout of support frame and corresponding first carriage sliding fit, the support frame rigid coupling has the elastic sheet, the fixed cover be equipped with be used for it with rotate spacing dislocation mechanism between the cover, first fixed shell is equipped with and is used for adjusting the shrink mechanism of elastic sheet deformation degree;
the dislocation mechanism is including protruding ring gear, protruding ring gear rigid coupling in fixed cover, it has a plurality of third fixed shells to rotate lantern ring shape array rigid coupling, the third fixed shell slides and is provided with the penetration the sliding block of rotating the cover, the sliding block with protruding ring gear spacing cooperation, sliding block and corresponding install first spring between the third fixed shell, the support frame rigid coupling has the fixed plate of symmetric distribution, the lower extreme rigid coupling of elastic sheet has the fixed block.
Preferably, the side wall of the elastic sheet is provided with uniformly distributed balls for reducing friction force between the elastic sheet and the well wall.
Preferably, the side of the fixing block away from the corresponding elastic piece is an inclined surface for guiding the rotation of the rotation sleeve.
Preferably, the contraction mechanism comprises a plurality of second springs in an annular array, the second springs are respectively arranged between the corresponding first fixing shell and the corresponding first sliding frame, a third spring is arranged between the second fixing shell and the corresponding second sliding frame, and the rotating sleeve is provided with a limiting assembly for limiting the second sliding frame.
Preferably, the limiting assembly comprises a plurality of fixing frames which are in an annular array, the fixing frames are fixedly connected to the rotating sleeve, a third sliding frame is arranged on the fixing frames in a sliding mode, the third sliding frame penetrates through the corresponding first fixing shell and the corresponding second fixing shell and slides with the corresponding second fixing shell, blind holes matched with the corresponding third sliding frame are formed in the second sliding frame, a wedge block is fixedly connected to one end of the third sliding frame, located in the first fixing shell, a fourth spring is arranged between the third sliding frame and the corresponding first fixing shell, a limiting groove is formed in the first sliding frame, the limiting groove is matched with the corresponding wedge block, and a protective sleeve is arranged between the supporting frame and the corresponding first sliding frame and the corresponding second sliding frame respectively.
Preferably, the elastic sheet support device further comprises a support mechanism for supporting the elastic sheet, the support mechanism is arranged on the support frame, the support mechanism comprises a plurality of fourth fixing shells which are distributed in an array, the fourth fixing shells are fixedly connected with the corresponding support frame respectively, the fourth fixing shells are provided with fourth sliding frames in a sliding mode, the fourth sliding frames are fixedly connected with the corresponding elastic sheet, and the rotating sleeve is provided with a locking assembly for limiting deformation of the elastic sheet.
Preferably, the locking assembly comprises a plurality of fixing columns distributed in an annular array, the fixing columns are fixedly connected to the rotating sleeve through connecting rods, a first cavity is formed in the middle of each fixing column, a fifth fixing shell is fixedly connected to each fixing column, a sliding plate is arranged on each fifth fixing shell in a sliding mode, the sliding plate is matched with the corresponding fifth fixing shell to form a second cavity, the fixing columns are provided with through holes, the first cavities are communicated with the second cavities through the through holes, the first fixing shells are matched with the corresponding first sliding frames to form a third cavity, the fourth fixing shells are matched with the corresponding fourth sliding frames to form a fourth cavity, the first cavities are respectively communicated with the corresponding third cavity and the corresponding fourth cavity through hoses, two second sliding grooves are formed in the fixing columns, and sliding blocks used for blocking the first cavities are arranged in the second sliding grooves of the fixing columns in a sliding mode.
Preferably, the first chamber, the second chamber, the through hole, the third chamber and the fourth chamber are filled with hydraulic oil for slowing down deformation of the elastic sheet.
Preferably, the second sliding groove of the fixed column is inclined and used for guiding the sliding block to move.
The invention has the following advantages: according to the invention, through the guiding function of the inclined plane on the fixed block in the dislocation mechanism, the rotating sleeve drives the connected parts to rotate, so that extrusion of the raised stone blocks to six elastic sheets is reduced, the elastic sheets are integrally close to the sleeve through limit fit of the wedge-shaped blocks and the limit grooves in the limit assemblies, the deformation degree of the elastic sheets is weakened, the service life of the elastic sheets is prolonged, the sleeve is enabled to move in the horizontal well through movement of the sliding blocks in the locking assemblies and then matched with the supporting mechanism, the fourth sliding frame supports the middle part of the elastic sheets, and the first sliding frame and the second sliding frame keep a static state, so that deformation of the elastic sheets positioned at the lower part of the horizontal well is avoided, namely friction between the sleeve and the lower side wall of the horizontal well is prevented, and the effect of protecting the sleeve is achieved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic structural view of components at the first and second fixing shells according to the present invention;
FIG. 3 is a cross-sectional view of the dislocating mechanism of the present invention;
FIG. 4 is a schematic view of the retraction mechanism of the present invention;
FIG. 5 is a cross-sectional view of a spacing assembly of the present invention;
FIG. 6 is a cross-sectional view of the support mechanism of the present invention;
fig. 7 is a cross-sectional view of the locking assembly of the present invention.
In the figure: 1. the sleeve, 2, fixed sleeve, 3, rotating sleeve, 4, first fixed shell, 5, first sliding frame, 6, second fixed shell, 7, second sliding frame, 8, supporting frame, 9, elastic piece, 10, convex gear ring, 11, third fixed shell, 12, sliding block, 13, first spring, 14, fixed plate, 15, fixed block, 16, second spring, 17, third spring, 18, fixed frame, 19, third sliding frame, 20, wedge, 201, fourth spring, 21, limit groove, 22, protective sleeve, 23, fourth fixed shell, 24, fourth sliding frame, 26, fixed column, 261, first chamber, 27, fifth fixed shell, 28, sliding plate, 29, second chamber, 30, through hole, 31, third chamber, 32, fourth chamber, 33, sliding block.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Example 1: referring to fig. 1 and 2, an underground casing centralizer for oilfield exploitation is shown, which comprises a fixed sleeve 2, the limit type rotation of the fixed sleeve 2 is provided with a rotating sleeve 3, six first fixed shells 4 and six second fixed shells 6 are fixedly connected to the side wall annular array of the rotating sleeve 3, the first fixed shells 4 are positioned right below the corresponding second fixed shells 6, the first fixed shells 4 are slidably provided with a first sliding frame 5, the second fixed shells 6 are slidably provided with a second sliding frame 7, one end of the first sliding frame 5 and the second sliding frame 7, far away from the rotating sleeve 3, is in a T shape, the T-shaped end of the second sliding frame 7 is rotatably provided with a supporting frame 8, the lower part of the supporting frame 8 is provided with a first sliding groove, the first sliding groove of the supporting frame 8 is slidably matched with the T-shaped end of the corresponding first sliding frame 5, the supporting frame 8 is fixedly connected with an elastic sheet 9, the outer side walls of the six elastic sheets 9 are all provided with evenly distributed balls, the balls are used for reducing friction force between the elastic sheets 9 and a well wall, the middle part of the fixed sleeve 2 is provided with a second sliding frame 7, one end of the second sliding frame is far away from the rotating sleeve 3 is in a T shape, the T-shaped end of the second sliding frame 7 is rotatably provided with a supporting frame 8, the T-shaped end of the first sliding frame 8 is fixedly connected with the elastic sheet 9, the elastic sheet 9 is in an arc, the T-shaped is fixedly connected with the elastic sheet 9, the elastic sheet 9 is arranged between the elastic sheet 9, the elastic sheet is arranged, the elastic sheet 6 is arranged, the elastic sheet is arranged, the corresponding side is under the side of the corresponding side, and the elastic sheet is under the corresponding side, and the elastic sheet is and the elastic sheet and the elastic casing is.
Referring to fig. 2 and 3, the dislocation mechanism includes a convex gear ring 10, the convex gear ring 10 is fixedly connected in an annular groove of the fixed sleeve 2, six third fixed shells 11 are fixedly connected in an annular array to the rotary sleeve 3, the six third fixed shells 11 and the six elastic pieces 9 are distributed in an intersecting way, the third fixed shells 11 are slidably provided with sliding blocks 12, the sliding blocks 12 penetrate through the rotary sleeve 3 and are slidably connected with the rotary sleeve 3, the sliding blocks 12 are provided with convex teeth, the convex teeth of the sliding blocks 12 are in limit fit with the convex gear ring 10, a first spring 13 is installed between the sliding blocks 12 and the corresponding third fixed shells 11, the first spring 13 is located between the corresponding third fixed shells 11, the upper end and the lower end of each supporting frame 8 are fixedly connected with two fixed plates 14, the fixed plates 14 are fixedly connected with the adjacent elastic pieces 9, the two ends of each elastic piece 9 are in a rigid state, the lower end of each elastic piece 9 is fixedly connected with a fixed block 15, the six fixed blocks 15 are distributed in a circumferential equidistant way, the lower side of each fixed block 15 is in an inclined plane, the inclined plane is used for guiding the rotary sleeve 3 to rotate, the convex blocks 15 are in the corresponding positions of the upper parts of the well wall, and the convex blocks are prevented from extruding the corresponding convex blocks 15 to the corresponding convex blocks to the stone blocks to prevent the convex blocks from extruding the stone blocks from extruding the corresponding convex blocks to the rotary blocks from extruding the stone sleeve 9, and avoiding the convex blocks from extruding the corresponding convex blocks to be completely extruding the stone blocks to be extruded to the well wall.
Referring to fig. 4, the shrinking mechanism includes six second springs 16 in an annular array, the six second springs 16 are respectively installed between the corresponding first fixing shell 4 and the corresponding first sliding frame 5, the second springs 16 are located in the corresponding first fixing shell 4, a third spring 17 is installed between the second fixing shell 6 and the corresponding second sliding frame 7, the third spring 17 is located in the corresponding second fixing shell 6, the rotating sleeve 3 is provided with a limiting component, the limiting component is used for limiting the second sliding frame 7, the elastic piece 9 is properly close to the sleeve 1 by utilizing elastic deformation of the second springs 16 and the third springs 17, deformation degree of the elastic piece 9 is weakened, and accordingly service life of the elastic piece 9 is prolonged.
Referring to fig. 4-6, the limiting component comprises six fixing frames 18 in an annular array, the six fixing frames 18 are fixedly connected to the outer side surface of the rotating sleeve 3, the fixing frames 18 are located between the corresponding first fixing shell 4 and the corresponding second fixing shell 6, a third sliding frame 19 is slidably arranged in the fixing frames 18, the upper part and the lower part of the third sliding frame 19 penetrate through the corresponding first fixing shell 4 and the corresponding second fixing shell 6 respectively and slide with the corresponding second fixing shell 6, the second sliding frame 7 is provided with blind holes, the blind holes of the second sliding frame 7 are in limiting fit with the upper part of the corresponding third sliding frame 19, a fourth spring 201 is fixedly connected to the lower end of the third sliding frame 19, the fourth spring 201 is located in the corresponding first fixing shell 4, a limiting groove 21 matched with the corresponding wedge 20 is formed in the first sliding frame 5, a protecting sleeve 22 is arranged between the supporting frame 8 and the corresponding first sliding frame 5 and the corresponding second sliding frame 7 respectively, the protecting sleeve 22 is used for preventing impurities from entering the inner sliding frame 8 and the second sliding frame 7 to affect the initial side wall of the second sliding frame 7, and the elastic side wall of the second sliding frame 7 is prevented from being influenced by the elastic pieces of the first sliding frame 7.
The evenly distributed fixed sleeves 2 are sequentially arranged on the sleeve 1, and then when the sleeve 1 is placed underground, the sleeve 1 is positioned in the middle of a well under the supporting protection effect of the six elastic sheets 9 along with the downward movement of the sleeve 1, so that abrasion between the sleeve 1 and the well wall is avoided.
When the elastic sheet 9 passes through the wall of a well with partial roughness, the corresponding elastic sheet 9 is extruded by the protruding stone on the wall of the well to deform, so that the elastic sheet 9 swings towards the direction close to the sleeve 1 and deforms, and under the elastic action of the fourth spring 201 in the initial state, the third sliding frame 19 is inserted into the blind hole of the adjacent second sliding frame 7, the second sliding frame 7 is in the limiting and fixing state, the elastic sheet 9 at the appointed position swings and extrudes the corresponding first sliding frame 5 to slide, the first sliding frame 5 moves and compresses the corresponding second spring 16, when the stone on the wall of the well passes through the middle part of the elastic sheet 9, the middle part of the elastic sheet 9 deforms correspondingly, so that the sleeve 1 is always ensured to be positioned in the middle part of the well and collapse caused by extrusion is avoided.
If the passing stone is too large, the elastic sheet 9 at the designated position is extruded to swing, so that the elastic sheet 9 drives the corresponding first sliding frame 5 to move through the corresponding supporting frame 8, the limit groove 21 on the first sliding frame 5 extrudes the wedge block 20, the wedge block 20 extrudes to drive the third sliding frame 19 to move downwards, the third sliding frame 19 moves downwards to release the fit with the blind hole on the corresponding second sliding frame 7, and at the moment, the elastic sheet 9 is extruded to move together with the corresponding second sliding frame 7 through the corresponding supporting frame 8, namely, the elastic sheet 9 is integrally close to the sleeve 1 at the moment, so that the deformation degree of the elastic sheet 9 is weakened, and the service life of the elastic sheet 9 is prolonged.
After passing through the protruding stone block, the parts are reset by the opposite movement under the action of the elasticity of the second spring 16, the third spring 17 and the fourth spring 201, so that the six elastic sheets 9 can continuously support the sleeve 1.
When the part of the protruding larger stone blocks passes through, the protruding stone blocks are extruded to contact the inclined surface of the extruded fixed block 15, the following sleeve 1 moves downwards, the fixed block 15 is subjected to circumferential extrusion force, the extrusion force is transmitted to the rotating sleeve 3 through the elastic sheets 9, the corresponding supporting frames 8, the corresponding first sliding frames 5, the corresponding second sliding frames 7, the corresponding first fixed shells 4 and the corresponding second fixed shells 6, the rotating sleeve 3 finally drives the connected parts to rotate correspondingly, the six sliding blocks 12 are far away from and compress the corresponding first springs 13 due to extrusion of the protruding gear rings 10, the protruding gear rings 10 are clamped by the six sliding blocks 12 after the rotating sleeve 3 is rotated, the initial state is restored, the rotating sleeve 3 rotates to enable the six elastic sheets 9 to be correspondingly dislocated, contact extrusion of the elastic sheets 9 and the larger protruding stone blocks is reduced, and accordingly, the well wall stone blocks are prevented from being separated due to serious extrusion of the elastic sheets 9, and the integrity of a well is guaranteed.
Example 2: on the basis of embodiment 1, referring to fig. 6, the device further comprises a supporting mechanism, the supporting mechanism is arranged on the supporting frame 8 and is used for supporting the elastic sheet 9, the supporting mechanism comprises six fourth fixing shells 23 distributed in an array, the six fourth fixing shells 23 are fixedly connected to the middle parts of the corresponding supporting frames 8 respectively, the fourth fixing shells 23 are slidably provided with fourth sliding frames 24 fixedly connected with the corresponding elastic sheet 9, the rotating sleeve 3 is provided with a locking component, the locking component is used for limiting deformation of the elastic sheet 9, and deformation of the elastic sheet 9 is controlled through support of the fourth sliding frames 24, so that the shape change of the elastic sheet 9 is prevented from affecting the elastic support.
Referring to fig. 6 and 7, the locking assembly includes six fixing columns 26 distributed in an annular array, the six fixing columns 26 are fixedly connected to the outer side surface of the rotating sleeve 3 through connecting rods, the six fixing columns 26 are located at the right outer sides of the six fixing frames 18, a first cavity 261 is arranged in the middle of each fixing column 26, a fifth fixing shell 27 is fixedly connected to each fixing column 26, the six fifth fixing shells 27 are distributed at equal intervals in the circumferential direction, a sliding plate 28 is slidably arranged in each fifth fixing shell 27, a part of each sliding plate 28 close to each corresponding fixing column 26 is matched with each corresponding fifth fixing shell 27 to form a second cavity 29, each fixing column 26 is provided with a through hole 30 for communicating each corresponding first cavity 261 with each corresponding second cavity 29, each first fixing shell 4 is matched with each corresponding first sliding frame 5 to form a third cavity 31, a part of each fourth fixing shell 23 close to each sleeve 1 is matched with each corresponding fourth sliding frame 24 to form a fourth cavity 32, the first chamber 261 is respectively communicated with the corresponding third chamber 31 and the corresponding fourth chamber 32 through hoses, the fixed column 26 is provided with two second sliding grooves, the second sliding grooves of the fixed column 26 are inclined, the lower parts of the second sliding grooves are close to the sleeve 1, the upper parts of the second sliding grooves are opposite to the corresponding first chamber 261, sliding blocks 33 are slidably arranged in the second sliding grooves of the fixed column 26, the weight of the sliding blocks 33 is large, the first chamber 261, the second chamber 29, the through holes 30, the third chamber 31 and the fourth chamber 32 are filled with hydraulic oil and used for slowing down the deformation of the elastic sheet 9, the upper side and the lower side of the sliding blocks 33 are respectively provided with arc-shaped surfaces for increasing the contact area of the sliding blocks 33 with the hydraulic oil in the first chamber 261, and the parts connected with the sliding blocks 1 are enabled to be in a blocking mode when the sleeve 1 drives the parts in the horizontal well to move, namely, the elastic sheet 9 is in a rigid state and is contacted with the side wall of the horizontal well, so that the contact friction between the sleeve 1 and the side wall of the well wall is avoided.
When the casing 1 is moved from the vertical well to the horizontal well, as the casing 1 becomes horizontal, the parts connected with the fixed sleeve 2, the rotating sleeve 3 and the like become horizontal together, and the sliding block 33 is positioned in the fixed column 26 at the lower side of the horizontal well, and the sliding block 33 moves along the second sliding groove on the fixed column 26 under the action of self gravity, so that the sliding block 33 blocks the first cavity 261 in the fixed column 26 at the lower side of the position, thereby blocking the flow of hydraulic oil.
In the horizontal movement process of the casing 1, the elastic sheet 9 located at the lower side of the horizontal well is tightly attached to the well wall, but because the first chamber 261 located at the lower side of the horizontal well cannot flow hydraulic oil, even if the volume of the hydraulic oil in the fourth chamber 32 and the third chamber 31 is kept unchanged, namely, the fourth sliding frame 24 supports the middle part of the elastic sheet 9, and meanwhile, the first sliding frame 5 cannot move, so that deformation of the elastic sheet 9 is avoided, and even if the elastic sheet 9 located at the lower side of the horizontal well becomes an approximate rigid support plate, namely, the lower part becomes a rigid centralizer, the elastic sheet 9 at the upper part can still elastically deform, and friction between the casing 1 and the well wall in the horizontal well is avoided.
The above operation is performed in the same way when the casing 1 moves down in the vertical well, wherein the sliding block 33 is always located at the lower part of the second sliding groove on the corresponding fixed column 26 under the action of gravity, namely, the first chamber 261 of the corresponding part is always kept open, when the corresponding elastic sheet 9 deforms, the hydraulic oil in the third chamber 31 and the fourth chamber 32 correspondingly changes, the hydraulic oil flows through the hose and the through hole 30 and changes in the second chamber 29, finally, the sliding plate 28 correspondingly moves, the following elastic sheet 9 returns to the initial state, and the above operation is performed in the same way.
Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides an oil field exploitation casing centralizer in pit, is including fixed cover (2), its characterized in that: the fixed sleeve (2) is rotatably provided with a rotating sleeve (3), a plurality of first fixed shells (4) and a plurality of second fixed shells (6) are fixedly connected with the rotating sleeve (3) in an annular array mode, the first fixed shells (4) are slidably provided with first sliding frames (5), the second fixed shells (6) are slidably provided with second sliding frames (7), the second sliding frames (7) are rotatably provided with supporting frames (8), the supporting frames (8) are provided with first sliding grooves, the first sliding grooves of the supporting frames (8) are in sliding fit with the corresponding first sliding frames (5), the supporting frames (8) are fixedly connected with elastic pieces (9), the fixed sleeve (2) is provided with a limiting dislocation mechanism used between the fixed sleeve and the rotating sleeve (3), and the first fixed shells (4) are provided with shrinkage mechanisms used for adjusting deformation degrees of the elastic pieces (9).
The dislocation mechanism is including protruding ring gear (10), protruding ring gear (10) rigid coupling in fixed cover (2), rotate cover (3) annular array rigid coupling and have a plurality of third fixed shells (11), third fixed shell (11) slip is provided with and pierces through sliding block (12) of rotating cover (3), sliding block (12) with protruding ring gear (10) spacing cooperation, sliding block (12) and corresponding install first spring (13) between third fixed shell (11), support frame (8) rigid coupling has symmetrically distributed's fixed plate (14), the lower extreme rigid coupling of elastic sheet (9) has fixed block (15).
2. The oilfield exploitation downhole casing centralizer of claim 1, wherein: the side wall of the elastic sheet (9) is provided with uniformly distributed balls, and the balls are used for reducing friction force between the elastic sheet (9) and a well wall.
3. The oilfield exploitation downhole casing centralizer of claim 1, wherein: the side of the fixed block (15) far away from the corresponding elastic piece (9) is an inclined plane and is used for guiding the rotating sleeve (3) to rotate.
4. The oilfield exploitation downhole casing centralizer of claim 1, wherein: the shrinkage mechanism comprises a plurality of second springs (16) which are in annular array, the second springs (16) are respectively arranged between the corresponding first fixing shell (4) and the corresponding first sliding frame (5), a third spring (17) is arranged between the second fixing shell (6) and the corresponding second sliding frame (7), and the rotating sleeve (3) is provided with a limiting component used for limiting the second sliding frame (7).
5. The oilfield exploitation downhole casing centralizer of claim 4, wherein: the limiting assembly comprises a plurality of fixing frames (18) which are in annular array, wherein the fixing frames (18) are fixedly connected to a rotating sleeve (3), a third sliding frame (19) is arranged on the fixing frames (18) in a sliding mode, the third sliding frame (19) penetrates through the corresponding first fixing shell (4) and the corresponding second fixing shell (6) and slides with the corresponding second fixing shell (6), blind holes matched with the corresponding third sliding frame (19) are formed in the second sliding frame (7), a wedge block (20) is fixedly connected to one end of the third sliding frame (19) located in the first fixing shell (4), a fourth spring (201) is arranged between the third sliding frame (19) and the corresponding first fixing shell (4), a limiting groove (21) is formed in the first sliding frame (5), the limiting groove (21) is matched with the corresponding wedge block (20), and a protective sleeve is arranged between the supporting frame (8) and the corresponding first sliding frame (5) and the corresponding second sliding frame (7).
6. The oilfield exploitation downhole casing centralizer of claim 1, wherein: the elastic sheet (9) is characterized by further comprising a supporting mechanism used for supporting the elastic sheet (9), the supporting mechanism is arranged on the supporting frame (8), the supporting mechanism comprises a plurality of fourth fixing shells (23) which are distributed in an array, the fourth fixing shells (23) are fixedly connected with the corresponding supporting frame (8) respectively, the fourth fixing shells (23) are slidably provided with fourth sliding frames (24), the fourth sliding frames (24) are fixedly connected with the corresponding elastic sheet (9), and the rotating sleeve (3) is provided with locking assemblies used for limiting deformation of the elastic sheet (9).
7. The oilfield exploitation downhole casing centralizer of claim 6, wherein: the locking assembly comprises a plurality of fixed columns (26) which are distributed in an annular array, the fixed columns (26) are fixedly connected with the rotating sleeve (3) through connecting rods, a first chamber (261) is formed in the middle of each fixed column (26), a fifth fixed shell (27) is fixedly connected with each fixed column (26), a sliding plate (28) is arranged on each fifth fixed shell (27) in a sliding mode, each sliding plate (28) is matched with the corresponding fifth fixed shell (27) to form a second chamber (29), each fixed column (26) is provided with a through hole (30), each first chamber (261) is communicated with the corresponding second chamber (29) through the corresponding through hole (30), a third chamber (31) is formed by matching the corresponding first fixed shell (4) with the corresponding first sliding frame (5), a fourth chamber (32) is formed by matching the corresponding fourth fixed shell (23) with the corresponding fourth sliding frame (24), each first chamber (261) is respectively provided with a sliding groove (33) through the corresponding hose and the corresponding second chamber (26), and the first chamber (261) are respectively provided with a sliding groove (33).
8. The oilfield exploitation downhole casing centralizer of claim 7, wherein: the first chamber (261), the second chamber (29), the through hole (30), the third chamber (31) and the fourth chamber (32) are filled with hydraulic oil, and the hydraulic oil is used for slowing down deformation of the elastic sheet (9).
9. The oilfield exploitation downhole casing centralizer of claim 7, wherein: the second sliding groove of the fixed column (26) is inclined and used for guiding the sliding block (33) to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311111757.3A CN116838266B (en) | 2023-08-31 | 2023-08-31 | Underground casing centralizer for oilfield exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311111757.3A CN116838266B (en) | 2023-08-31 | 2023-08-31 | Underground casing centralizer for oilfield exploitation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116838266A true CN116838266A (en) | 2023-10-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117823061A (en) * | 2024-03-06 | 2024-04-05 | 河北上善石油机械有限公司 | Integral powerful elastic sleeve centralizer |
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| CN116146122A (en) * | 2023-04-24 | 2023-05-23 | 胜利油田渤海固井工程技术有限责任公司 | Casing centralizer with resistance reducing function |
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| US20140251639A1 (en) * | 2013-03-11 | 2014-09-11 | Portable Composite Structures, Inc. | Method and devices for centralizing a casing |
| NO20130870A1 (en) * | 2013-06-21 | 2014-12-22 | Casol As | Feeding tube centralization system and method for centralizing a feeding tube |
| CN111963078A (en) * | 2020-10-23 | 2020-11-20 | 胜利油田固邦石油装备有限责任公司 | Limiting device of casing centralizer |
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| CN115341859A (en) * | 2022-08-30 | 2022-11-15 | 何会英 | Sucker rod rotation protection device with eccentric wear prevention function |
| CN115370304A (en) * | 2022-10-25 | 2022-11-22 | 东营市源鑫石油科技有限公司 | Integral elastic centralizer with rotary obstacle avoidance function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117823061A (en) * | 2024-03-06 | 2024-04-05 | 河北上善石油机械有限公司 | Integral powerful elastic sleeve centralizer |
| CN117823061B (en) * | 2024-03-06 | 2024-05-14 | 河北上善石油机械有限公司 | Integral powerful elastic sleeve centralizer |
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| CN116838266B (en) | 2023-11-03 |
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