GB2104937A - Method and means for fishing a sucker rod string which includes a separated fiberglass sucker rod - Google Patents
Method and means for fishing a sucker rod string which includes a separated fiberglass sucker rod Download PDFInfo
- Publication number
- GB2104937A GB2104937A GB08135255A GB8135255A GB2104937A GB 2104937 A GB2104937 A GB 2104937A GB 08135255 A GB08135255 A GB 08135255A GB 8135255 A GB8135255 A GB 8135255A GB 2104937 A GB2104937 A GB 2104937A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sucker rod
- fishing tool
- fiberglass
- bore
- fishing
- 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
- 239000011152 fibreglass Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000000717 retained effect Effects 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000007704 transition Effects 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/125—Grappling tools, e.g. tongs or grabs specially adapted for parted wire line or ropes
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Fishing Rods (AREA)
Abstract
Methods and means are provided for fishing a sucker rod string which includes a separated fiberglass sucker rod 86 having numerous fiberglass strands 90 that are difficult to bundle or group and cause difficulty fishing out the separated string. A generally tubular fishing tool 100 has a side opening 19 extending through the lowermost end. Such side opening 19 has a longitudinally disposed first surface 12 and a helically disposed second surface 14, both of which are tapered so as to guide the fiberglass strands inwardly into the bore of the fishing tool 100 as it is simultaneously rotated and lowered. The fishing tool has means 40 to grip the sucker rod string within its bore above the side opening. As the fishing tool is lowered down and around the separated end of the sucker rod, the fishing tool is rotated to bundle the numerous loose fiberglass strands 90 inwardly into the fishing tool bore by action of the tapered surfaces 12 14 of the side opening so that the bundled fiberglass strands do not ball up or plug the bore of the fishing tool. The fishing tool is then lowered to grip the sucker rod string and then lifted from the well bore together with the sucker string. <IMAGE>
Description
SPECIFICATION
Method and means for fishing a sucker rod string which includes a separated fiberglass sucker rod
The present invention generally relates to methods and means for fishing a sucker rod string from a bore of a well. More particularly, the present invention relates to fishing tools and methods of removing a separated portion of the sucker rod string from the well bore wherein an upper end of the separated portion has a separated fiber-glass sucker rod having fiberglass strands difficult to gather into a bundle or group.
Sucker rods made of metal have been used for many years in strings to operate down hole pumps to pump fluid from the wells. Many times these sucker rod strings have separated due to overloads, fatigue, corrosion, or physical damage.
The portion of a metal sucker rod string left in a well bore presents an upwardly positioned sucker rod end of the same or a lesser diameter than the original rod diameter, which therefore presents little opposition to the passage of a known fishing tool over the sucker rod end.
Fiberglass rods such as disclosed in U.S.
Patents Nos. 2,874,937; 2,874,938; and 4,195,691 and in abandoned U.S. Application S.N.
956,740, referred to in No.4,195,691, and in
Canadian Patent No. 1,072,191 based on U.S.
Application S.N. 576,731 are also used in sucker rod strings. However, when a fiberglass sucker rod separates, the resin bond shatters allowing the numerous separate fiberglass strands which comprise the fiberglass body of the sucker rod to scatter in various lateral directions at the point of separation. Conventional overshot fishing tools have inwardly tapering lowermost surfaces for guiding a conventional metal rod end inwardly so that the overshot can pass down and around the rod, as is necessary to engage the sucker rod connection next below to remove the separated portion of the sucker rod string from the well bore.
When these known fishing tools are used in an attempt to fish out a separated fiberglass sucker rod, the numerous separated fiberglass strands tend to ball up and fill and plug the overshot bore and thereby prevent the conventional overshot from passing down and around the fiberglass rod.
Conventional sucker rod fishing tools have no provision for gathering, bunching and guiding inwardly such numerous separated fiberglass strands to allow a fishing tool to pass down and around the separated end of the fiberglass sucker rod.
Therefore, it is an object of the present invention to provide novel methods and means to fish a separated fiberglass sucker rod from a well bore.
It is a further object of this invention to provide methods and means to gather the numerous separate fiberglass strands of the separated fiberglass sucker rod and to grip a portion of the remaining sucker rod string to enable the sucker rod string to be lifted from the well.
The present invention comprises methods and
means to fish a separated fiberglass sucker rod of
a sucker rod string from a well bore wherein the separated rod has numerous fiberglass strands that are difficult to bundle or group and cause difficulty fishing out the separated string. A generally tubular fishing tool is provided that has a side opening extending through the lowermost end. Such side opening has a longitudinally disposed first surface tapered so as to guide fiberglass strands inwardly when the tool is rotated and a second helical surface intersecting the upper and lower ends of the first surface. Each surface may form an acute angle with the outer cylindrical surface of the tool. Above the side opening, the tool has means to grip the sucker rod string.As the fishing tool is lowered down and around the separated end of the sucker rod, the tool is rotated to bundle the numerous loose fiberglass strands inwardly into the fishing tool bore by action of the acute angle on the surfaces of the side opening, so that the bundled fiberglass strands do not ball up or plug the bore of the fishing tool. The fishing tool then is lowered further so that the means internal to the fishing tool may grip the sucker rod string after which the sucker rod string may be lifted from the well bore by the fishing tool.
The present invention will be further described, by way of example only, with reference to the accompanying drawings, in which: Fig. 1 is a longitudinal section of the fishing tool of the present invention.
Fig. 2 is a side view of the lower tubular section of the present invention.
Fig. 3 is a transverse section of the lower tubular section shown in Fig. 2.
Fig. 4 shows a side view of the fishing tool of the present invention approaching a separated fiberglass sucker rod of a sucker rod string within a tubing string.
Fig. 5 shows a longitudinal section of the fishing tool of Fig. 1 engaged with a separated fiberglass sucker rod a sucker rod string.
Fig. 6 shows a longitudinal sectional view of an alternative embodiment of the lower portion of the fishing tool of the present invention.
Fig. 7 shows an enlarged longitudinal sectional view of a wedge member of Fig. 6.
While the invention will be described in connection with a preferred embodiment and procedure, it will be understood that it is not intended to limit the invention to that embodiment or procedure. On the contrary, it is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
Referring first to Fig. 1, there is shown a fishing tool 100 which includes a tubular lower section 10 having a bore 28. As best shown in Figs. 2 and 3, the tubular lower section 10 comprises a longitudinally disposed surface 12 and a helically disposed surface 14 contiguous with surface 12 at a lower end 1 6 and an upper end 1 8 of surface 12 to define a side wall opening 19 in outer cylindrical surface 20. Each of surfaces 12 and 14 forms an acute angle with outer cylindrical surface 20, as is best shown for longitudinal surface 12 in
Fig. 3 by angle 24 and for helical surface 14 in Fig.
6 by angles 26. Referring again to Fig. 2, it is seen
that the tubular lower section 10 is attachable to
the remainder of the fishing tool 100 by
threads 22
Referring once again to Fig. 1, the fishing tool
100 includes a tubular intermediate section 30
located above and threadedly engaged with the
tubular lower section 10. The tubular intermediate
section 30 has a bore 32 coaxial with the bore 28
of tubular lower section 10. The bore 32 is defined
by a bore wall 34 having a helical groove 36
therein which is itself defined by an inwardly
tapering surface 38. A movable helical wedge
member 40 having teeth 42 thereon is positioned
and retained adjacent the inwardly tapering
surface 38.The wedge member 40 is
longitudinally movable adjacent the inwardly
tapering surface 38 such that when the wedge
member 40 is moved upward within the fishing
tool 100, as it may be urged by an object within
the bore 32 of the intermediate tubular member
30, the wedge member 40 is expanded outwardly
along the inwardly tapering surface 38. Similarly,
when the wedge member 40 is moved
downwardly within the bore 32 of the
intermediate tubular member 30, as urged by the
teeth 42 contacting a downwardly moving object within the bore 32, the inwardly tapering surface
38 causes the wedge member 40 to move
inwardly. contracting and gripping the object therein.
An upper tubular section 69 of the fishing tool
100 includes a transition member 70 having an
internal shoulder 44, barrel members 72, union
members 74, and a connection member 76 having threads 78 thereon for connection to a fishing
string 79.
Fig. 4 shows, within a bore 80 of a tubing string
82, the fishing tool 100 approaching a sucker rod
string 84 which includes a separated fiberglass
sucker rod 86. The separated fiberglass sucker rod
86 includes numerous fiberglass strands 90 at a
point of separation 88 and a remaining fiberglass portion 92. The separated fiberglass sucker rod 86 is connected to the remainder of the sucker rod string 84 by a pin and box connection 94.
Fig. 5 shows the fishing tool 100 fully engaged with the sucker rod string 94. It can be seen that the numerous fiberglass strands 90 and the remaining fiberglass portion 92 of the separated fiberglass sucker rod 86 have passed the shoulder 44 and are retained within the upper tubular section 69 of the fishing tool 100. It can also be seen that the shoulder 44 engages the pin and box connection 94 of the sucker rod string 84 to prevent the passage of the pin and box connection 94 upwardly of the shoulder 44, thereby retaining the pin and box connection 94 within the intermediate tubular member 30 where the wedge 40 is located.Any downward movement of the pin and box connection 94 moves the wedge 40 downwardly and inwardly to grip the pin and box connection 94 ever tighter and thereby prevents its removal from the fishing tool 100 while the fishing tool 100 and the sucker rod string 84 are lifted from the tubing bore 80.
Fig. 6 shows an alternative embodiment 101 of the fishing tool of the present invention. The same tubular lower member 10 is engages with a first tubular intermediate member 31 having a bore 33 defined by a bore wall 35 having a circumferential groove 37 defined by an inwardly tapering surface 39. A movable circumferential wedge member 41 having teeth 43 is movably retained adjacent the inwardly tapering surface 39. The wedge member 41 interacts with an object within the bore 33 in a manner similar to that earlier described for helical wedge member 40.
Also shown in Fig. 6 above the shoulder 44 is a second tubular intermediate section 50 having a bore 52 defined by a bore wall 54 having a circumferential groove 56 defined by an inwardly tapering surface 58. A movable wedge member 60 having teeth 62 is movably retained in contact with the inwardly tapering surface 58. As is best shown in Fig. 7, a retainer screw 68 passes through a slot 66 in the wedge member 60 to threadedly engage a hole 64 of the second tubular intermediate section 50 to movably retain the wedge member 60. As the groove 56 and the wedge member 60 are located above the shoulder 44, the wedge member 60 acts upon the remaining fiberglass portion 92 of the separated fiberglass sucker rod 86.
In operation, the fishing tool 100 is attached to the fishing string 79 and lowered within the bore 80 of the tubing string 82 to a position substantially at the level of the point of separation 88 of the separated fiberglass sucker rod 86. The fishing tool 100 is then simultaneously lowered and rotated so that the longitudinally disposed surface 12 and the helically disposed surface 14 gather or bunch the numerous fiberglass strands 90 inwardly into the bore 28 of the lower tubular section 10 of the fishing tool 100, allowing the fishing tool 100 to pass downwardly and over both the numerous fiberglass strands 90, the remaining fiberglass portion 92 of the separated fiberglass sucker rod 86, and the pin and box connection 94 of the sucker rod string 84. This downward motion of the fishing tool 100 causes the sucker rod string 84 to move upwardly within the fishing tool 100, moving the wedge member 40 upwardly and expanding it outwardly along the inwardly tapering surface 38. After the fishing tool 100 is lowered sufficiently that the shoulder 44 engages the pin and box connection 94 of the sucker rod string 84, the teeth 42 of the wedge 40 thereby engage the pin and box connection 94, permitting the fishing tool 100 and the sucker rod string 84 to be raised and removed from the bore 80. In the alternative embodiment 101 of the fishing tool shown in Fig. 6, the wedge 41 performs substantially as the wedge 40 previously described. Additionally, the wedge 60 grips the remaining fiberglass portion 92 of the separated sucker rod 86 substantially in the manner described.
Thus it is apparent that there has been provided, in accordance with the invention, a method and means for fishing a sucker rod string which includes a separated fiberglass sucker rod that fully satisfies the objects, aims, and advantages set forth above. While the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations as fall within the spirit and broad scope of the appended claims.
Claims (14)
1. A fishing tool for a separated fiberglass sucker rod in a sucker rod string in a well bore wherein the end of the separated fiberglass sucker rod being fished for has fiberglass strands difficult to gather into a bundle comprising:
(a) means for gathering the fiberglass strands of the separated fiberglass sucker rod; and
(b) means for gripping a next adjacent pin and box connection of the sucker rod string to enable the sucker rod string to be lifted from the well bore.
2. A fishing tool for a separated fiberglass sucker rod in a sucker rod string in a well bore wherein the end of the separated fiberglass sucker rod being fished for has fiberglass strands difficult to gather into a bundle, comprising:
(a) means for gathering the fiberglass strands of the separated fiberglass sucker rod; and
(b) means for gripping a remaining fiberglass portion of the separated fiberglass sucker rod to enable the sucker rod string to be lifted from the well bore.
3. The fishing tool of Claim 1 or 2 wherein the means for gathering the fiberglass strands comprises:
(a) a tubular lower section of the fishing tool formed with an opening in the wall thereof; and
(b) the opening being defined by a substantially longitudinally disposed surface extending from a lower end of the tubular lower section and a substantially helically disposed surface extending from the lower end of the tubular lower section to a zone of intersection with the substantially longitudinally disposed surface.
4. The fishing tool of Claim 3 wherein each of said surfaces is disposed to form an acute angle together with a contiguous outer cylindrical surface of the tubular lower section.
5. The fishing tool of Claim 1 wherein the means for gripping a next adjacent pin and box connection of the sucker rod string comprises:
(a) a tubular section of the fishing tool;
(b) a bore within the tubular section sufficient to receive the pin and box connection of the sucker rod string, said bore being defined by a bore wall;
(c) at least one groove formed in the bore wall, said groove being defined by an inwardly tapering surface; and
(d) at least one movable wedge positioned and retained adjacent said inwardly tapering surface; said wedge member interacting with said tapering surface so that when the tool is passed over the pin and box connection of the sucker rod string, the wedge member moves upwardly and outwardly within said bore, thereby expanding to receive the pin and box connection, and so that when said pin and box connection attempts to move downwardly within said bore, the wedge member moves downwardly and inwardly within said bore, thereby gripping the pin and box connection to prevent its removal from the fishing tool as the tool is lifted upwardly for removal of the sucker rod string from the well bore.
6. The fishing tool of Claim 5 wherein the groove, the tapering surface and the wedge member are circumferentially disposed.
7. The fishing tool of Claim 5 wherein the groove, the tapering surface, and the wedge member are helically disposed.
8. The fishing tool of Claim 2 wherein the means for gripping a remaining fiberglass portion of the separated fiberglass sucker rod comprises;
(a) a tubular section of the fishing tool;
(b) a bore within the tubular section sufficient to receive the remaining fiberglass section, said bore being defined by a bore wall;
(c) at least one circumferential groove formed in the bore wall, said groove being defined by an inwardly tapering surface; and
(d) at least one movable wedge member positioned and retained adjacent said inwardly tapering surface, said wedge member interacting with said inwardly tapering surface so that when said remaining fiberglass portion is inserted into the bore the wedge member moves upwardly and outwardly within said bore, thereby expanding to receive said remaining fiberglass portion, and so that when said remaining fiberglass portion attempts to move downwardly within said tubular section, the wedge member moves downwardly and inwardly within said bore, thereby gripping said remaining fiberglass portion to prevent its removal from the fishing tool as the fishing tool is lifted upwardly for removal of the sucker rod string from the well bore.
9. The fishing tool of Claim 1 further comprising means for gripping a remaining fiberglass portion of the separated fiberglass sucker rod to enable the sucker rod string to be lifted from the well bore.
10. A method of fishing a separated fiberglass sucker rod of a sucker rod string from a well bore when the separated fiberglass sucker rod has fiberglass strands at the point of separation which are difficult to bundle and which hinder fishing the sucker rod string, comprising the steps of:
(a) mounting a suitable fishing tool having a substantially coaxial bore on a fishing string;
(b) lowering the fishing tool and fishing string into the well bore and positioning a lower end of the fishing tool substantially at the level of the top of the separated fiberglass sucker rod;
(c) rotating the fishing string and the fishing tool to cause a suitably disposed surface of the fishing tool to gather the strands inwardly into the fishing tool bore such that the fishing tool may pass downwardly and over the upper end of the sucker rod; and
(d) simultaneously lowering the fishing tool down and around the separated sucl < er rod.
11. The method of Claim 10 further comprising the steps of:
(a) lowering the fishing tool sufficiently to pass the fishing tool over and around a next lower pin and box connection of the sucker rod string and gripping the connection with gripping means of the fishing tool; and
(b) lifting the fishing string, the fishing tool, and the sucker rod string sufficiently to remove the sucker rod string from the well bore.
12. The method of Claim 10 further comprising the steps of:
(a) lowering the fishing tool sufficiently to pass the fishing tool over and around a remaining fiberglass portion of the separated sucker rod and gripping the remaining fiberglass portion with gripping means of the fishing tool; and
(b) lifting the fishing string, the fishing tool, and the sucker rod string sufficiently to remove the sucker rod string from the well bore.
13. A fishing tool as claimed in Claim 1, substantially as hereinbefore described, with reference to and as illustrated in the accompanying drawings.
14. A fishing tool as claimed in Claim 2, substantially as hereinbefore described, with reference to and as illustrated in the accompanying drawing.
1 5. A method of fishing a separated fiberglass sucker rod from a well bore, as claimed in Claim 10, substantially as hereinbefore described in any one of the drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29663281A | 1981-08-27 | 1981-08-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2104937A true GB2104937A (en) | 1983-03-16 |
| GB2104937B GB2104937B (en) | 1985-05-15 |
Family
ID=23142851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08135255A Expired GB2104937B (en) | 1981-08-27 | 1981-11-23 | Method and means for fishing a sucker rod string which includes a separated fiberglass sucker rod |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5837289A (en) |
| DE (1) | DE3147955A1 (en) |
| GB (1) | GB2104937B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5149163A (en) * | 1989-12-26 | 1992-09-22 | Well-O Oil Service, Inc. | On and off fishing tool |
| GB2312911A (en) * | 1994-01-25 | 1997-11-12 | Baker Hughes Inc | A tool for retrieving a completion tool |
| EP1083297A2 (en) * | 1999-09-10 | 2001-03-14 | 3-D Drilling BV | Apparatus for freeing an object underground, and the application of such apparatus |
| EP2295711A3 (en) * | 2009-07-29 | 2014-04-16 | Hydrus Corporation, Inc. | Well fishing method and system |
| NO335541B1 (en) * | 2013-04-29 | 2014-12-29 | C6 Technologies As | Fiber composite rod cable fishing tool |
| CN104712282A (en) * | 2014-12-19 | 2015-06-17 | 中煤科工集团重庆研究院有限公司 | Slender rod fisher for coal bed gas ground well |
| CN106321005A (en) * | 2016-10-28 | 2017-01-11 | 中国石油化工股份有限公司 | Fishing socket for fixed valve ball of tubing pump and using method of fishing socket |
| CN106351600A (en) * | 2016-09-27 | 2017-01-25 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Fisher for broken-off fixed valve of tubing pump |
| CN112539035A (en) * | 2019-09-20 | 2021-03-23 | 中国石油化工股份有限公司 | Anti-drop and fishing integrated device for sucker rod |
| CN117514057A (en) * | 2024-01-04 | 2024-02-06 | 大庆辰平钻井技术服务有限公司 | Overshot for oil well and ultra-short radius horizontal well blocking removing method |
-
1981
- 1981-11-23 GB GB08135255A patent/GB2104937B/en not_active Expired
- 1981-12-03 DE DE19813147955 patent/DE3147955A1/en not_active Withdrawn
-
1982
- 1982-08-09 JP JP13836582A patent/JPS5837289A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5149163A (en) * | 1989-12-26 | 1992-09-22 | Well-O Oil Service, Inc. | On and off fishing tool |
| GB2312911A (en) * | 1994-01-25 | 1997-11-12 | Baker Hughes Inc | A tool for retrieving a completion tool |
| GB2312911B (en) * | 1994-01-25 | 1998-07-15 | Baker Hughes Inc | Retrieving tool |
| GB2286213B (en) * | 1994-01-25 | 1998-07-15 | Baker Hughes Inc | Retrievable whipstock anchor assembly |
| EP1083297A2 (en) * | 1999-09-10 | 2001-03-14 | 3-D Drilling BV | Apparatus for freeing an object underground, and the application of such apparatus |
| EP1083297A3 (en) * | 1999-09-10 | 2003-03-26 | 3-D Drilling BV | Apparatus for freeing an object underground, and the application of such apparatus |
| EP2295711A3 (en) * | 2009-07-29 | 2014-04-16 | Hydrus Corporation, Inc. | Well fishing method and system |
| WO2014178722A3 (en) * | 2013-04-29 | 2015-03-26 | C6 Technologies As | A fibre composite rod fishing tool |
| NO335541B1 (en) * | 2013-04-29 | 2014-12-29 | C6 Technologies As | Fiber composite rod cable fishing tool |
| CN104712282A (en) * | 2014-12-19 | 2015-06-17 | 中煤科工集团重庆研究院有限公司 | Slender rod fisher for coal bed gas ground well |
| CN106351600A (en) * | 2016-09-27 | 2017-01-25 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | Fisher for broken-off fixed valve of tubing pump |
| CN106321005A (en) * | 2016-10-28 | 2017-01-11 | 中国石油化工股份有限公司 | Fishing socket for fixed valve ball of tubing pump and using method of fishing socket |
| CN106321005B (en) * | 2016-10-28 | 2019-06-07 | 中国石油化工股份有限公司 | Tubular pump fixing valve ball fishing socket and its application method |
| CN112539035A (en) * | 2019-09-20 | 2021-03-23 | 中国石油化工股份有限公司 | Anti-drop and fishing integrated device for sucker rod |
| CN112539035B (en) * | 2019-09-20 | 2022-07-22 | 中国石油化工股份有限公司 | Anti-drop and fishing integrated device for sucker rod |
| CN117514057A (en) * | 2024-01-04 | 2024-02-06 | 大庆辰平钻井技术服务有限公司 | Overshot for oil well and ultra-short radius horizontal well blocking removing method |
| CN117514057B (en) * | 2024-01-04 | 2024-04-02 | 大庆辰平钻井技术服务有限公司 | Overshot for oil well and ultra-short radius horizontal well blocking removing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5837289A (en) | 1983-03-04 |
| DE3147955A1 (en) | 1983-03-10 |
| GB2104937B (en) | 1985-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |