CN110607999A - Ball centralizer for casing pipe - Google Patents
Ball centralizer for casing pipe Download PDFInfo
- Publication number
- CN110607999A CN110607999A CN201910768731.3A CN201910768731A CN110607999A CN 110607999 A CN110607999 A CN 110607999A CN 201910768731 A CN201910768731 A CN 201910768731A CN 110607999 A CN110607999 A CN 110607999A
- Authority
- CN
- China
- Prior art keywords
- ball
- casing
- centralizer
- barrel
- pipe sleeve
- 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
- 239000003129 oil well Substances 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 5
- 230000000903 blocking effect Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005096 rolling process Methods 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
Landscapes
- 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)
- Earth Drilling (AREA)
Abstract
The invention provides a ball centralizer for a casing, which comprises: the oil well casing comprises a pipe sleeve, a ball barrel and a jackscrew, wherein the pipe sleeve can be sleeved on an oil well casing, a plurality of guide grooves are uniformly arranged on the pipe sleeve, a righting strip is formed between every two guide grooves, and a through hole is formed in each righting strip; the ball barrel is fixed in the through hole, the inner end of the ball barrel is blocked, the outer end of the ball barrel is provided with a necking, a ball and a spring are arranged in the ball barrel, the spherical surface of the ball protrudes out of the necking, and the spring is propped between the ball and the inner side of the blocked end of the ball barrel; the side wall of the pipe sleeve is provided with a positioning hole, and the jackscrew is screwed into the positioning hole. The ball centralizer for the casing has the advantages of contractible outer diameter, convenience for rotation of an oil well casing, simple structure, easiness in processing and assembling and capability of meeting the construction requirement of inclined shaft section well cementation operation.
Description
Technical Field
The invention belongs to the technical field of oil and gas field development, and particularly relates to a ball centralizer for a casing.
Background
Most of the existing centralizers for the oil well casing pipes need to be connected between two oil-saving well casing pipes to achieve a centralizing effect on the oil well casing pipes, the centralizers can be sleeved on the oil well casing pipes, but the outer diameters of the centralizers are fixed and can not be contracted, the centralizers are adaptive to the side walls of oil wells, the outer diameters of the centralizers are contracted, the centralizers are inconvenient to rotate on the oil well casing pipes, the centralizers are complex in structure, the labor intensity of machining and assembling is high, and the construction requirements of inclined well section cementing operation cannot be met.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide a ball centralizer for casing which overcomes or at least partially solves or alleviates the above problems.
The invention provides a ball centralizer for a casing, which comprises:
the oil well casing pipe comprises a pipe sleeve, wherein the pipe sleeve can be sleeved on an oil well casing pipe, a plurality of guide grooves are uniformly arranged on the pipe sleeve, a righting strip is formed between every two guide grooves, and a through hole is formed in each righting strip;
the ball barrel is fixed in the through hole, the inner end of the ball barrel is blocked, the outer end of the ball barrel is provided with a necking, a ball and a spring are arranged in the ball barrel, the spherical surface of the ball protrudes out of the necking, and the spring is pressed between the ball and the inner side of the blocked end of the ball barrel;
the side wall of the pipe sleeve is provided with a positioning hole, and the jackscrew is screwed into the positioning hole.
The invention also has the following optional features.
Optionally, two ends of the centering strip are respectively provided with a chamfer.
Optionally, the flow guide groove and the centering strip are both spiral.
Optionally, an annular blocking piece is arranged at the outer end of the ball barrel, and the necking is formed by the annular blocking piece.
Optionally, the outer side wall of the ball cylinder is provided with an external thread, an internal thread is arranged in the through hole, and the ball cylinder is in threaded fit with the through hole.
Optionally, the inner end of the ball barrel is provided with an internal thread and is fitted with an end cap via the internal thread.
Optionally, the ball barrel and the annular blocking piece are of an integral structure.
Optionally, the outer surface of the ring-shaped blocking piece and the outer surface of the end cover are respectively provided with a slot.
The invention has the beneficial effects that:
the ball centralizer for the casing pipe can be sleeved on an oil well casing pipe through the pipe sleeve, the ball barrel is fixed in the through hole in the centralizing strip, the spherical surface of the ball in the ball barrel protrudes out of the ball barrel, the centralizing range of the centralizing strip can be enlarged, the oil well casing pipe can be conveniently rotated, meanwhile, the spring in the ball barrel provides elasticity for the ball, the ball can be contracted after being pressed, the construction requirement of inclined shaft section well cementation operation can be met, and the ball and the spring are assembled in the ball barrel in a combined mode, so that the structure of the centralizer is simplified, and the centralizer is convenient to assemble and use.
Drawings
FIG. 1 is a schematic diagram of the overall construction of one embodiment of a ball centralizer for casing of the present invention;
fig. 2 is a schematic view of the full-section structure at a-a in fig. 1.
In the above figures: 1, pipe sleeve; 101, a diversion trench; 102 a righting strip; 103 through holes; 104 positioning holes; 2, a ball cylinder; 201 an annular baffle plate; 202 end caps; 3, rolling balls; 4, a spring; 5 top threads.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
Example 1
Referring to fig. 1 and 2, an embodiment of the present invention provides a ball centralizer for casing, including: the oil well casing comprises a casing pipe 1, a ball barrel 2 and a jackscrew 5, wherein the casing pipe 1 can be sleeved on an oil well casing pipe, a plurality of guide grooves 101 are uniformly arranged on the casing pipe 1, a righting strip 102 is formed between every two guide grooves 101, and a through hole 103 is respectively arranged on each righting strip 102; the ball barrel 2 is fixed in the through hole 103, the inner end of the ball barrel 2 is blocked, the outer end of the ball barrel 2 is provided with a necking, a ball 3 and a spring 4 are arranged in the ball barrel 2, the spherical surface of the ball 3 protrudes out of the necking, and the spring 4 is propped between the ball 3 and the inner side of the blocked end of the ball barrel 2; the side wall of the pipe sleeve 1 is provided with a positioning hole 104, and the top thread 5 is screwed into the positioning hole 104.
The pipe sleeve 1 can be sleeved on the side wall of an oil well casing, the pipe sleeve 1 is fixed on the side wall of an oil well through a top thread 5 screwed into a positioning hole 104, a flow guide groove 101 and a centering strip 102 on the side wall of the pipe sleeve 1 are arranged at intervals, the centering strip 102 and balls 3 are used for being supported on the well wall of the oil well, the oil well casing is located in the center of the oil well, meanwhile, the flow guide groove 101 on the pipe sleeve 1 cannot prevent fluid from passing through, a ball barrel 2 is assembled in a through hole 103 on the centering strip 102, the balls 3 are pushed by a spring 4 in the ball barrel 2 to enable the spherical surface of the balls to protrude out of the ball barrel 2, and after the balls 3 can be in contact with the well wall of the oil well, when the pipe sleeve 1 moves or rotates relative to the well wall of the oil well along with the oil well casing, the balls. When the non-vertical oil well section is constructed, particularly when the inclined well is constructed, and the ball 3 in the centralizer meets a corner or a necking part of the well wall of the oil well, the compression spring 4 of the ball 3 retracts into the ball barrel 2 under the action of the well wall of the oil well, so that the centralizing diameter is reduced, and the centralizer can pass through easily.
Example 2
Referring to fig. 1 and 2, on the basis of embodiment 1, both ends of the centering bar 102 are respectively provided with chamfers.
The chamfers at the two ends of the centering strip 102 can reduce the collision between the centering strip 102 and the well wall, so that the casing and the centralizer are more smooth when being placed in an oil well.
Example 3
Referring to fig. 1, on the basis of embodiment 2, the diversion trench 101 and the centralizer strips 102 are both spiral-shaped.
The helical centralizer strips 102 are longer in length for a fixed length of casing 1, and a greater number of through holes 103 can be provided in each centralizer strip 102 to accommodate more barrels 2 and balls 3.
Example 4
Referring to fig. 1, on the basis of embodiment 1, the outer end of the ball barrel 2 is provided with an annular baffle 201, and a throat is formed by the annular baffle 201.
The thickness of the annular separation blade 201 is smaller, the inner diameter of the annular separation blade is smaller than the diameter of the ball 3, the ball 3 can be prevented from falling out of the ball barrel 2, and meanwhile, the spherical surface of the ball 3 can be enabled to protrude out of the outer end of the ball barrel 2 as much as possible.
Example 5
Referring to fig. 2, on the basis of embodiment 4, the outer side wall of the ball barrel 2 is provided with an external thread, the through hole 103 is provided with an internal thread, and the ball barrel 2 is in threaded fit with the through hole 103.
The ball barrel 2 can be matched with the internal thread in the through hole 103 through the external thread, and is convenient to assemble and replace.
Example 6
Referring to fig. 2, on the basis of embodiment 5, the inner end of the ball barrel 2 is provided with an internal thread, and is fitted with an end cap 202 through the internal thread.
Two ends of the ball barrel 2 are communicated, the inner end of the ball barrel 2 is connected with the end cover 202 through threads, the ball 3 and the spring 4 are installed from the inner end of the ball barrel 2, then the end cover 202 is screwed in to seal the rear end of the ball barrel 2, the spring 4 pushes the ball 3 out of the outer port of the ball barrel 2 and is blocked by the annular blocking piece 201, and the spherical surface of the ball 3 protrudes out of the annular blocking piece 201.
Example 7
Referring to fig. 1 and 2, on the basis of embodiment 5, the ball barrel 2 and the ring-shaped baffle 201 are of an integral structure.
Annular separation blade 201 and the structure of ball section of thick bamboo 2 formula as an organic whole have simplified the assembly structure of ball section of thick bamboo 2, and annular separation blade 201 can not come off from ball section of thick bamboo 2, has improved annular separation blade 201 to the spacing reliability of ball 3. .
Example 8
Referring to fig. 1 and 2, on the basis of embodiment 6 or embodiment 7, the outer surface of the ring-shaped baffle 201 and the outer surface of the end cover 202 are respectively provided with a slot.
The screw driver is stretched into the slot on the outer surface of the end cover 202 and then twisted, the end cover can be screwed into the inner end of the ball barrel 2, the screw driver is stretched into the slot on the annular baffle 201 at the outer end of the ball barrel 2 and then twisted, and the ball barrel 2 can be screwed into the through hole 103.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (8)
1. A ball centralizer for casing, comprising:
the oil well casing pipe comprises a pipe sleeve (1), wherein the pipe sleeve (1) can be sleeved on an oil well casing pipe, a plurality of guide grooves (101) are uniformly arranged on the pipe sleeve (1), a righting strip (102) is formed between every two guide grooves (101), and a through hole (103) is formed in each righting strip (102);
the ball barrel (2) is fixed in the through hole (103), the inner end of the ball barrel (2) is blocked, the outer end of the ball barrel is provided with a necking, a ball (3) and a spring (4) are arranged in the ball barrel (2), the spherical surface of the ball (3) protrudes out of the necking, and the spring (4) is pressed between the ball (3) and the inner side of the blocked end of the ball barrel (2);
the pipe sleeve comprises a jackscrew (5), a positioning hole (104) is formed in the side wall of the pipe sleeve (1), and the jackscrew (5) is screwed into the positioning hole (104).
2. The ball centralizer for casing according to claim 1, wherein both ends of the centralizer strips (102) are respectively provided with a chamfer.
3. Ball centralizer for casing, according to claim 2, characterized in that the guide channel (101) and the centralizer strips (102) are each helical.
4. Ball centralizer for casing, according to claim 1, characterized in that the outer end of the ball cylinder (2) is provided with an annular flap (201), the constriction being formed by the annular flap (201).
5. Ball centralizer for casing, according to claim 4, characterized in that the outer side wall of the ball cylinder (2) is provided with an external thread and the through hole (103) is provided with an internal thread, the ball cylinder (2) being screw-fitted with the through hole (103).
6. A ball centralizer for casing according to claim 5, the inner end of the barrel (2) being internally threaded and fitted with an end cap (202) by means of the internal thread.
7. The ball centralizer for casing according to claim 5, characterized in that the ball cylinder (2) is of one-piece construction with the annular flap (201).
8. Ball centralizer for casing, according to claim 6 or 7, characterized in that the outer surface of the ring flap (201) and the outer surface of the end cap (202) are provided with slots, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768731.3A CN110607999A (en) | 2019-08-20 | 2019-08-20 | Ball centralizer for casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768731.3A CN110607999A (en) | 2019-08-20 | 2019-08-20 | Ball centralizer for casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110607999A true CN110607999A (en) | 2019-12-24 |
Family
ID=68891018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910768731.3A Pending CN110607999A (en) | 2019-08-20 | 2019-08-20 | Ball centralizer for casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110607999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718506A (en) * | 2022-04-19 | 2022-07-08 | 黑龙江北方双佳钻采机具有限责任公司 | Arrow-shaped check valve with seal mounting structure |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997008425A1 (en) * | 1995-08-28 | 1997-03-06 | Down Hole Technologies Pty. Ltd. | Self-centering system for a tool travelling through a tubular member |
| CN2420421Y (en) * | 2000-04-07 | 2001-02-21 | 朱福金 | Composite fracturing and slotting tool |
| CN201202432Y (en) * | 2008-04-30 | 2009-03-04 | 大庆油田有限责任公司 | Self-balance compression type water-blocking packer of horizontal well |
| CN202467699U (en) * | 2012-01-10 | 2012-10-03 | 李德全 | Telescopic type casing centralizer |
| CN203905848U (en) * | 2014-06-25 | 2014-10-29 | 中国石油大学(北京) | Downhole self-adaptive elastic centralizer |
| CN204152454U (en) * | 2014-09-26 | 2015-02-11 | 西南石油大学 | A kind of centralizer |
| CN205840809U (en) * | 2016-07-20 | 2016-12-28 | 山东唐口煤业有限公司 | A kind of New Kind of Anti-Abrasion type stile |
| CN205936437U (en) * | 2016-08-03 | 2017-02-08 | 中国石油天然气股份有限公司 | Centralizer for rod oil production equipment and centralizing wellhead blowout prevention box for oil pumping unit |
| CN106837200A (en) * | 2017-04-25 | 2017-06-13 | 西南石油大学 | A kind of spherical centralizer of spring A seating |
| CN206444743U (en) * | 2017-01-20 | 2017-08-29 | 苏州星亿机械有限公司 | Flat upper unloading centrifuge |
| CN108798553A (en) * | 2018-06-13 | 2018-11-13 | 大庆市晟威机械制造有限公司 | A kind of height-adjustable oil pumping rod centering device |
| CN211115832U (en) * | 2019-08-20 | 2020-07-28 | 陕西固德石油工程有限公司 | Ball centralizer for casing pipe |
-
2019
- 2019-08-20 CN CN201910768731.3A patent/CN110607999A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997008425A1 (en) * | 1995-08-28 | 1997-03-06 | Down Hole Technologies Pty. Ltd. | Self-centering system for a tool travelling through a tubular member |
| CN2420421Y (en) * | 2000-04-07 | 2001-02-21 | 朱福金 | Composite fracturing and slotting tool |
| CN201202432Y (en) * | 2008-04-30 | 2009-03-04 | 大庆油田有限责任公司 | Self-balance compression type water-blocking packer of horizontal well |
| CN202467699U (en) * | 2012-01-10 | 2012-10-03 | 李德全 | Telescopic type casing centralizer |
| CN203905848U (en) * | 2014-06-25 | 2014-10-29 | 中国石油大学(北京) | Downhole self-adaptive elastic centralizer |
| CN204152454U (en) * | 2014-09-26 | 2015-02-11 | 西南石油大学 | A kind of centralizer |
| CN205840809U (en) * | 2016-07-20 | 2016-12-28 | 山东唐口煤业有限公司 | A kind of New Kind of Anti-Abrasion type stile |
| CN205936437U (en) * | 2016-08-03 | 2017-02-08 | 中国石油天然气股份有限公司 | Centralizer for rod oil production equipment and centralizing wellhead blowout prevention box for oil pumping unit |
| CN206444743U (en) * | 2017-01-20 | 2017-08-29 | 苏州星亿机械有限公司 | Flat upper unloading centrifuge |
| CN106837200A (en) * | 2017-04-25 | 2017-06-13 | 西南石油大学 | A kind of spherical centralizer of spring A seating |
| CN108798553A (en) * | 2018-06-13 | 2018-11-13 | 大庆市晟威机械制造有限公司 | A kind of height-adjustable oil pumping rod centering device |
| CN211115832U (en) * | 2019-08-20 | 2020-07-28 | 陕西固德石油工程有限公司 | Ball centralizer for casing pipe |
Non-Patent Citations (1)
| Title |
|---|
| 毕福伟;于九政;刘延青;杨玲智;: "双密封套管保护封隔器的研制与应用", 石油机械, vol. 45, no. 02, 10 February 2017 (2017-02-10), pages 93 - 95 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718506A (en) * | 2022-04-19 | 2022-07-08 | 黑龙江北方双佳钻采机具有限责任公司 | Arrow-shaped check valve with seal mounting structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104454757B (en) | hydraulic cylinder and its cylinder cover structure | |
| CN110725649A (en) | Push-leaning type rotary guiding tool | |
| CN110607999A (en) | Ball centralizer for casing pipe | |
| CN211115832U (en) | Ball centralizer for casing pipe | |
| CN208220629U (en) | A kind of underground drop is rubbed low frequency impact drilling tool | |
| RU184027U1 (en) | WORKING SHOE | |
| CN211115883U (en) | Impact rotary reaming device | |
| CA2646599A1 (en) | Progressive cavity pump rod guide | |
| CN103924951B (en) | There is the perforator that built-in primacord squash type plays assembly admittedly | |
| CN108032999A (en) | A kind of undercarriage buffer unit | |
| CN206874819U (en) | Sealing ring | |
| CN210067972U (en) | Elastic reaming tool | |
| CN215718698U (en) | Main valve head subassembly anticreep device | |
| CN210977290U (en) | Push-leaning type rotary guiding tool | |
| RU158161U1 (en) | DEVICE FOR INSTALLATION IN A SCREWDRIVER'S CARTRIDGE FOR SCREWING OF THE SELF-CUTTERS | |
| RU87745U1 (en) | CHECK VALVE | |
| CN207795238U (en) | A kind of circular tube structure acoustic logging instrument | |
| CN107345475A (en) | Resilient balls centralizer | |
| RU175062U1 (en) | DRAIN VALVE | |
| CN110439484A (en) | A kind of impact rotation reaming formula guide shoe device | |
| RU2698359C2 (en) | Valve | |
| CN215148750U (en) | Gyro single-core halter conversion head dismounting tool | |
| RU55845U1 (en) | CALIBRATOR CENTER | |
| CN203442239U (en) | Unidirectional check valve | |
| CN211083284U (en) | Seamless steel pipe |
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 |