CN112253006A - Instrument centering device in open hole well - Google Patents
Instrument centering device in open hole well Download PDFInfo
- Publication number
- CN112253006A CN112253006A CN202011249412.0A CN202011249412A CN112253006A CN 112253006 A CN112253006 A CN 112253006A CN 202011249412 A CN202011249412 A CN 202011249412A CN 112253006 A CN112253006 A CN 112253006A
- Authority
- CN
- China
- Prior art keywords
- sliding
- rod
- sleeve
- control rod
- spring
- 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.)
- Granted
Links
- 238000009434 installation Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002002 slurry Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 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
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
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)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a centering device for an open hole downhole instrument, which comprises a shaft bushing, a main spring, a power sliding sleeve, a telescopic supporting arm, a link shaft and a fixing ring, wherein the main spring is arranged on the shaft bushing; wherein the shaft bushing comprises a fixed sleeve and a guide sleeve which are integrally connected, and the guide sleeve is connected with the fixed ring through a linking shaft; the main spring and the power sliding sleeve are sleeved on the guide sleeve, one end of the main spring is connected with the fixed sleeve, and the other end of the main spring is connected with the power sliding sleeve; the power sliding sleeve is connected with the fixing ring through the telescopic supporting arm; and a lock pin assembly used for locking the power sliding sleeve and the guide sleeve is arranged in the power sliding sleeve. The invention can effectively solve the problem of non-centering in the well logging process of the underground instrument, and the shaft bushing, the main spring, the power sliding sleeve, the telescopic support arm, the link shaft and the fixing ring are matched, and the telescopic support arm can change along with the change of the borehole diameter, thereby realizing centering of the underground instrument, being simple and convenient to install and effectively ensuring the excellent rate of well logging data.
Description
Technical Field
The invention relates to the technical field of oil exploration, in particular to a centering device for an open hole downhole instrument.
Background
At present, a centralizer for centralizing an underground instrument belongs to rubber materials, and when the centralizer is used on site, an iron wire for the centralizer needs to be bound on an instrument shell, the bound iron wire is thick, a plurality of iron wires are bound, and time and labor are wasted. Meanwhile, the centralizer is disposable, and the centralizer must be replaced when going to a well, so that the use cost is high.
In addition, in cold weather, the rubber centralizer becomes hard, the firmness of the binding centralizer is reduced, the impact of slurry in the well logging process and the effect of high temperature are easy to fall off from the casing of the instrument, so the quality of well logging data is influenced.
Therefore, how to provide an open hole downhole tool centralizer convenient to disassemble, assemble and use is a problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
Accordingly, the present invention is directed to a downhole tool centralizer for open hole wells that solves at least one of the problems set forth in the background section above.
In order to achieve the purpose, the invention adopts the following technical scheme:
a centering device for an open hole downhole instrument comprises a shaft bushing, a main spring, a power sliding sleeve, a telescopic supporting arm, a link shaft and a fixing ring; the shaft bushing comprises a fixed sleeve and a guide sleeve which are integrally connected, and the guide sleeve is connected with the fixed ring through the link shaft; the main spring and the power sliding sleeve are sleeved on the guide sleeve, one end of the main spring is connected with the fixed sleeve, and the other end of the main spring is connected with the power sliding sleeve; the power sliding sleeve is connected with the fixing ring through the telescopic supporting arm; and a lock pin assembly used for locking the power sliding sleeve and the guide sleeve is arranged in the power sliding sleeve.
Preferably, in the open hole downhole instrument centralizer, the power sliding sleeve comprises two semicircular sliding pieces, and the two sliding pieces are connected through a connecting spring; the sliding piece is provided with a lock pin assembly mounting hole, and the lock pin assembly is mounted in the lock pin assembly mounting hole.
Preferably, in the open hole downhole instrument centering device, the lock pin assembly comprises a control rod, a sliding rod, a first return spring, a second return spring, a pressure-bearing gasket and a positioning elliptical key, the lock pin assembly mounting hole is divided into a control rod mounting cavity and a sliding rod mounting cavity, and a spring positioning boss is arranged in the control rod mounting cavity;
preferably, in the open hole downhole instrument centering device, the control rod is slidably arranged in the control rod mounting cavity, the first return spring is sleeved on the control rod, and two ends of the first return spring respectively abut against the control rod boss and the spring positioning boss; a control rod limiting clamp spring is arranged at the orifice of the control rod installation cavity; one end of the control rod, which is close to the sliding rod, is provided with a groove for accommodating the positioning elliptical key;
a sliding rod boss is arranged at one end, close to the control rod, of the sliding rod, the sliding rod is arranged in the sliding rod installation cavity in a sliding mode, and a sliding rod limiting clamp spring is arranged at an orifice of the sliding rod installation cavity; the second reset spring is sleeved on the sliding rod, and two ends of the second reset spring respectively abut against the boss of the sliding rod and the limiting clamp spring of the sliding rod; one end of the second return spring, which is close to the sliding rod limiting clamp spring, is provided with the pressure-bearing gasket;
the junction of the control rod installation cavity and the sliding rod installation cavity is provided with a sliding groove with an opening facing the sliding sleeve, the positioning elliptical key is positioned in the sliding groove, and a key groove is formed in the position, corresponding to the sliding groove, of the guide sleeve.
Preferably, in the above centering device for the downhole instrument of the open hole, the telescopic support arm includes a first support rod and a second support rod hinged to the first support rod, a ball head arranged at the end of the first support rod is installed in a ball socket arranged on the power sliding sleeve, and a ball head arranged at the end of the second support rod is installed in a ball socket arranged on the fixing ring.
Preferably, in the centering device for the open hole downhole instrument, the fixing sleeve is provided with a positioning bolt hole, and a positioning bolt is screwed in the positioning bolt hole.
Preferably, in the centering device for the open hole downhole instrument, the fixing ring comprises two semicircular positioning pieces, and the two semicircular positioning pieces are fixedly connected through bolts.
According to the technical scheme, compared with the prior art, the centering device for the open hole downhole instrument can effectively solve the problem that the downhole instrument is not centered in the well logging process, and the shaft bushing, the main spring, the power sliding sleeve, the telescopic supporting arm, the connecting shaft and the fixing ring are matched, and the telescopic supporting arm can change along with the change of the borehole diameter, so that the centering of the downhole instrument is realized, the installation is simple and convenient, and the excellent rate of well logging data is effectively ensured.
The invention solves the problem of extensive installation process of the existing centralizer of the downhole instrument, and solves the problems that the rubber centralizer becomes hard, the firmness of the binding centralizer is reduced, the impact of slurry in the well logging process and the high temperature are acted, and the rubber centralizer is easy to fall off from the shell of the instrument, so that the quality of well logging information is influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the telescopic support arm in a collapsed state;
FIG. 2 is a schematic view of the telescopic support arm in an expanded state;
FIG. 3 is an enlarged view of the location of the positioning elliptical key before lowering the well;
FIG. 4 is an enlarged view of the location of the positioning elliptical key during downhole operation;
FIG. 5 is an enlarged view of the position of the positioning elliptical key after the telescopic supporting arm is opened when the telescopic supporting arm is lifted;
fig. 6 is a bottom view of the telescopic support arm of the present invention in an extended state.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With reference to the accompanying drawings 1-6, the embodiment of the invention discloses a centering device for an open hole downhole instrument, which comprises a shaft bushing 1, a main spring 2, a power sliding sleeve 3, a telescopic supporting arm 4, a link shaft 5 and a fixing ring 6; wherein the shaft bushing 1 comprises a fixed sleeve 7 and a guide sleeve 8 which are integrally connected, and the guide sleeve 8 is connected with a fixed ring 6 through a link shaft 5; the main spring 2 and the power sliding sleeve 3 are sleeved on the guide sleeve 8, one end of the main spring 2 is connected with the fixed sleeve 7, and the other end of the main spring is connected with the power sliding sleeve 3; the power sliding sleeve 3 is connected with the fixed ring 6 through the telescopic supporting arm 4; a lock pin assembly 9 for locking the power sliding sleeve 3 and the guide sleeve 8 is arranged in the power sliding sleeve 3.
In order to further optimize the technical scheme, the power sliding sleeve 3 comprises two semicircular sliding pieces which are connected through a connecting spring 10; the sliding piece is provided with a lock pin assembly mounting hole, and the lock pin assembly 9 is mounted in the lock pin assembly mounting hole.
In order to further optimize the technical scheme, the lock pin assembly 9 comprises a control rod 10, a sliding rod 11, a first return spring 12, a second return spring 13, a pressure-bearing gasket 14 and a positioning elliptical key 15, wherein a lock pin assembly mounting hole is divided into a control rod mounting cavity and a sliding rod mounting cavity, and a spring positioning boss is arranged in the control rod mounting cavity;
in order to further optimize the technical scheme, the control rod 10 is slidably arranged in the control rod installation cavity, one end of the control rod 10, which is close to the orifice of the control rod installation cavity, is provided with a control rod boss, the first return spring 12 is sleeved on the control rod 10, and two ends of the first return spring respectively abut against the control rod boss and the spring positioning boss; a control rod limiting clamp spring 16 is arranged at the orifice of the control rod installation cavity; one end of the control rod 10 close to the sliding rod 11 is provided with a groove for accommodating the positioning elliptical key 15;
a sliding rod boss is arranged at one end, close to the control rod 10, of the sliding rod 11, the sliding rod 11 is arranged in a sliding rod installation cavity in a sliding mode, and a sliding rod limiting clamp spring 17 is arranged at the orifice of the sliding rod installation cavity; the second return spring 13 is sleeved on the sliding rod 11, and two ends of the second return spring respectively abut against the sliding rod boss and the sliding rod limiting snap spring 17; one end of the second return spring 13 close to the slide rod limiting clamp spring 17 is provided with a pressure-bearing gasket 14; one end of the sliding rod 11, which is far away from the control rod 10, is provided with a sliding rod clamping spring 18 matched with the sliding rod limiting clamping spring 17.
The junction of the control rod installation cavity and the sliding rod installation cavity is provided with a sliding groove with an opening facing the sliding sleeve, the positioning elliptical key 15 is positioned in the sliding groove, and the guide sleeve 8 is provided with a key groove 20 at a position corresponding to the sliding groove.
In order to further optimize the above technical solution, the telescopic support arm 4 includes a first support rod 21 and a second support rod 22 hinged to the first support rod 21, a ball head provided at an end of the first support rod 21 is installed in a ball socket provided in the power sliding sleeve 3, and a ball head provided at an end of the second support rod 22 is installed in a ball socket provided in the fixing ring 6.
In order to further optimize the technical scheme, the fixing sleeve 7 is provided with a positioning bolt hole 23, and a positioning bolt is screwed in the positioning bolt hole 23.
In order to further optimize the above technical solution, the fixing ring 6 includes two semicircular positioning members, and the two semicircular positioning members are fixedly connected by bolts.
In order to further optimize the technical scheme, the link shaft 5 adopts a universal connecting shaft.
In order to further optimize the above technical solution, the length of the second support bar 22 is greater than the length of the first support bar 21.
The working principle is as follows:
firstly, assembling the equipment, and respectively coating lubricating grease in ball sockets of the power sliding sleeve 3 and the fixing ring 6.
Hinging a first support rod 21 and a second support rod 22, mounting a ball head arranged at the end part of the first support rod 21 in a ball socket arranged on the power sliding sleeve 3, and mounting a ball head arranged at the end part of the second support rod 22 in a ball socket arranged on the fixing ring 6;
the main spring 2 is sleeved on the guide sleeve 8 of the shaft bushing 1, the shaft bushing 1 penetrates through the shell of the instrument 19, the positioning bolt hole 23 arranged on the fixed sleeve 7 is aligned with the circular groove hole on the instrument 197, and the positioning bolt is rotated to be installed and fixed.
A second reset spring 13 is sleeved on a sliding rod 11 and installed in a sliding rod installation cavity of a lock pin installation hole, a pressure-bearing gasket 14 is installed at one end, close to a sliding rod limit clamp spring 17, of the second reset spring 13, the sliding rod limit clamp spring 17 is arranged at the hole opening of the sliding rod installation cavity, and a sliding rod clamp spring 18 matched with the sliding rod limit clamp spring 17 is arranged at one end, far away from a control rod 10, of the sliding rod 11.
The first return spring 12 is sleeved on the control rod 10, and two ends of the first return spring respectively abut against the control rod boss and the spring positioning boss; and a control rod limiting clamp spring 16 is arranged at the orifice of the control rod installation cavity, and the control rod 10 is clamped in the control rod installation cavity.
Lubricating grease is smeared in a sliding groove cavity of the lock pin assembly 9, the positioning elliptical key 15 is installed in the sliding groove cavity, two semicircular sliding pieces of the power sliding sleeve 3 are connected through a connecting spring 10 and installed on the guide sleeve 8, the lock pin assembly 9 is installed in a lock pin assembly installation hole, and the positioning elliptical key 15 in the lock pin assembly 9 enters a key groove 20 formed in the guide sleeve 8.
The telescopic supporting arm 4 is straightened and pasted on the shell of the instrument 19, and the two semicircular positioning pieces of the fixing ring 6 are fixedly connected through bolts and fixed on the shell of the instrument 19, so that the integral installation can be completed.
When the device works, the device is put into a well together with the instrument 19, the moving direction of the whole device is downward in the process of putting into the well, the reaction pressure from slurry acts on the pressure-bearing gasket 14 and the sliding rod 11, the second return spring 13 is extruded, the positioning elliptical key 15 is firmly fixed in the key groove 20 of the guide sleeve 8, and the telescopic supporting arm is in a folded state.
When the instrument 19 is lifted upwards, the moving direction of the whole device is upward, the reaction pressure from slurry acts on the control rod 10, the control rod 10 compresses the second return spring 13 and pushes the sliding rod 11 downwards, and meanwhile, under the condition that the main spring 2 presses the power sliding sleeve 3, the positioning elliptic key 15 can be extruded out of the key groove 20 of the guide sleeve 8, the locking state of the power sliding sleeve 3 is released, the power sliding sleeve starts to move, and the first support rod 21 and the second support rod 22 are opened.
The size of the opening angle between the first support rod 21 and the second support rod 22 changes along with the diameter of the borehole, when the diameter of the borehole becomes smaller, the first support rod 21 and the second support rod 22 are pressed to push the power sliding sleeve 3 to extrude the main spring 2, and the bending angle between the first support rod 21 and the second support becomes larger; when the diameter of the borehole is increased, the power sliding sleeve 3 is pushed to move by the elasticity of the main spring 2, the bending angle of the first supporting rod 21 and the second supporting rod is reduced, and the first supporting rod 21 and the second supporting rod 22 are linked by mutual extrusion of the main spring 2 and the power sliding sleeve 3.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A centering device for an open hole downhole instrument is characterized by comprising a shaft bushing, a main spring, a power sliding sleeve, a telescopic supporting arm, a link shaft and a fixing ring; the shaft bushing comprises a fixed sleeve and a guide sleeve which are integrally connected, and the guide sleeve is connected with the fixed ring through the link shaft; the main spring and the power sliding sleeve are sleeved on the guide sleeve, one end of the main spring is connected with the fixed sleeve, and the other end of the main spring is connected with the power sliding sleeve; the power sliding sleeve is connected with the fixing ring through the telescopic supporting arm; and a lock pin assembly used for locking the power sliding sleeve and the guide sleeve is arranged in the power sliding sleeve.
2. The open hole downhole tool centralizer of claim 1, wherein the power slide comprises two semicircular annular slides connected by a connecting spring; the sliding piece is provided with a lock pin assembly mounting hole, and the lock pin assembly is mounted in the lock pin assembly mounting hole.
3. The open hole downhole instrument centralizer of claim 2, wherein the lock pin assembly comprises a control rod, a sliding rod, a first return spring, a second return spring, a pressure-bearing gasket and a positioning elliptical key, the lock pin assembly mounting hole is divided into a control rod mounting cavity and a sliding rod mounting cavity, and a spring positioning boss is arranged in the control rod mounting cavity;
a control rod boss is arranged at one end, close to the orifice of the control rod mounting cavity, of the control rod, the control rod is arranged in the control rod mounting cavity in a sliding mode, the first return spring is sleeved on the control rod, and two ends of the first return spring respectively abut against the control rod boss and the spring positioning boss; a control rod limiting clamp spring is arranged at the orifice of the control rod installation cavity; one end of the control rod, which is close to the sliding rod, is provided with a groove for accommodating the positioning elliptical key;
a sliding rod boss is arranged at one end, close to the control rod, of the sliding rod, the sliding rod is arranged in the sliding rod installation cavity in a sliding mode, and a sliding rod limiting clamp spring is arranged at an orifice of the sliding rod installation cavity; the second reset spring is sleeved on the sliding rod, and two ends of the second reset spring respectively abut against the boss of the sliding rod and the limiting clamp spring of the sliding rod; one end of the second return spring, which is close to the sliding rod limiting clamp spring, is provided with the pressure-bearing gasket;
the junction of the control rod installation cavity and the sliding rod installation cavity is provided with a sliding groove with an opening facing the sliding sleeve, the positioning elliptical key is positioned in the sliding groove, and a key groove is formed in the position, corresponding to the sliding groove, of the guide sleeve.
4. The open hole downhole instrument centralizer of claim 1, wherein the telescopic support arm comprises a first support rod and a second support rod hinged to the first support rod, a ball arranged at the end of the first support rod is mounted in a ball socket arranged on the power sliding sleeve, and a ball arranged at the end of the second support rod is mounted in a ball socket arranged on the fixing ring.
5. The open hole downhole instrument centralizer of claim 1, wherein the fixing sleeve is provided with a positioning bolt hole, and a positioning bolt is screwed in the positioning bolt hole.
6. The open hole downhole instrument centralizer of claim 1, wherein the fixing ring comprises two semi-circular positioning pieces, and the two semi-circular positioning pieces are fixedly connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011249412.0A CN112253006B (en) | 2020-11-10 | 2020-11-10 | Borehole instrument centering device for open hole well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011249412.0A CN112253006B (en) | 2020-11-10 | 2020-11-10 | Borehole instrument centering device for open hole well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112253006A true CN112253006A (en) | 2021-01-22 |
| CN112253006B CN112253006B (en) | 2024-07-19 |
Family
ID=74266879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011249412.0A Active CN112253006B (en) | 2020-11-10 | 2020-11-10 | Borehole instrument centering device for open hole well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112253006B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3977468A (en) * | 1975-10-28 | 1976-08-31 | Dresser Industries, Inc. | Well bore caliper and centralizer apparatus having articulated linkage |
| US4615386A (en) * | 1985-02-22 | 1986-10-07 | Halliburton Company | Linear force centralizer |
| CN201391245Y (en) * | 2009-04-17 | 2010-01-27 | 中国石油天然气集团公司 | Underground logging centralizer |
| CN201460763U (en) * | 2009-05-21 | 2010-05-12 | 四川省杰尼亚化工有限责任公司 | Centralizer for petroleum logging instrument |
| CN203905848U (en) * | 2014-06-25 | 2014-10-29 | 中国石油大学(北京) | Downhole self-adaptive elastic centralizer |
| CN209244558U (en) * | 2018-12-07 | 2019-08-13 | 大庆科力远石油装备制造有限公司 | A kind of multisection type High-Temperature Well Logging equipment |
| CN110984879A (en) * | 2019-11-18 | 2020-04-10 | 天津精工石油专用管件股份有限公司 | Oil pipe type centralizer |
| CN213684015U (en) * | 2020-11-10 | 2021-07-13 | 武卫琴 | Instrument centering device in open hole well |
-
2020
- 2020-11-10 CN CN202011249412.0A patent/CN112253006B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3977468A (en) * | 1975-10-28 | 1976-08-31 | Dresser Industries, Inc. | Well bore caliper and centralizer apparatus having articulated linkage |
| US4615386A (en) * | 1985-02-22 | 1986-10-07 | Halliburton Company | Linear force centralizer |
| CN201391245Y (en) * | 2009-04-17 | 2010-01-27 | 中国石油天然气集团公司 | Underground logging centralizer |
| CN201460763U (en) * | 2009-05-21 | 2010-05-12 | 四川省杰尼亚化工有限责任公司 | Centralizer for petroleum logging instrument |
| CN203905848U (en) * | 2014-06-25 | 2014-10-29 | 中国石油大学(北京) | Downhole self-adaptive elastic centralizer |
| CN209244558U (en) * | 2018-12-07 | 2019-08-13 | 大庆科力远石油装备制造有限公司 | A kind of multisection type High-Temperature Well Logging equipment |
| CN110984879A (en) * | 2019-11-18 | 2020-04-10 | 天津精工石油专用管件股份有限公司 | Oil pipe type centralizer |
| CN213684015U (en) * | 2020-11-10 | 2021-07-13 | 武卫琴 | Instrument centering device in open hole well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112253006B (en) | 2024-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2672662C (en) | A radial spring latch apparatus and methods for making and using same | |
| AU615828B2 (en) | Method of installing a well tool in a well flow conductor | |
| CN213684015U (en) | Instrument centering device in open hole well | |
| GB2361488A (en) | Roller centralizer with increased closing moment of arms. | |
| US10830007B2 (en) | Tubular support and servicing systems | |
| US7121349B2 (en) | Wellhead protector | |
| CN112253006A (en) | Instrument centering device in open hole well | |
| CN201460763U (en) | Centralizer for petroleum logging instrument | |
| CN216894286U (en) | Spring centralizer | |
| CN114251067B (en) | Underground tool anchoring structure | |
| CN214576815U (en) | Drilling rod convenient to adjust length | |
| CN110219609B (en) | Installation method of emergency clamp | |
| CN114374174A (en) | Spacer mounting tool and operation method thereof | |
| CN115853443A (en) | Telescopic compensation device | |
| CN219953334U (en) | Simple casing collar finder | |
| CN219012526U (en) | Novel adjustable centralizer for oilfield logging instrument | |
| CN221074183U (en) | Double-seal coiled tubing hanger | |
| CN220226788U (en) | Mechanical single-core logging cable jar | |
| CN110173257B (en) | Guiding and damping device for open hole logging instrument | |
| CN211456524U (en) | Through wire fixing device | |
| CN221299215U (en) | Extrusion expansion support disc anchor cable | |
| CN219316910U (en) | Casing centralizer and casing | |
| CN217327227U (en) | Mast fixing mechanism and under-pressure operation machine | |
| CN216477188U (en) | Drilling rod device for oil exploration and exploitation | |
| CN218783569U (en) | Split type cable joint for well logging |
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 | ||
| GR01 | Patent grant |