CA2434770C - Apparatus for recording a physical impression of an object down an oil well - Google Patents
Apparatus for recording a physical impression of an object down an oil well Download PDFInfo
- Publication number
- CA2434770C CA2434770C CA002434770A CA2434770A CA2434770C CA 2434770 C CA2434770 C CA 2434770C CA 002434770 A CA002434770 A CA 002434770A CA 2434770 A CA2434770 A CA 2434770A CA 2434770 C CA2434770 C CA 2434770C
- Authority
- CA
- Canada
- Prior art keywords
- rods
- housing
- impression
- rod support
- starting position
- 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.)
- Expired - Fee Related
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 15
- 210000001520 comb Anatomy 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000011179 visual inspection Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 4
- 235000013405 beer Nutrition 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 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
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
- E21B47/098—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes using impression packers, e.g. to detect recesses or perforations
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Coating Apparatus (AREA)
Abstract
A reusable apparatus for making a physical impression of an object lodged down an oil well. A rod support is positioned in a housing. A plurality of rods are fractionally engaged and supported by the rod support in an orientation parallel to a longitudinal axis of the housing. Each of the rods is independently axially movable from a starting position to an impression position. Movement of the rods from the starting position to the impression position is effected by bringing the rods into contact with an object with sufficient force to overcome the frictional engagement with the rod support. The rods are returnable to the starting position in preparation for subsequent use.
Description
TITLE OF THE INVENTION:
Apparatus for recording a physical impression of an object down an oil well FIELD OF THE INVENTION
The present invention relates to an apparatus for recording a physical impression of an object down an oil well.
BACKGROUND OF THE INVENTION
In earth drilling, an obj ect is sometimes lost down the well and it becomes problematic as to how to retrieve it.
When this occurs a physical impression is made of the object.
The physical impression conveys information, which is used to deal with the object.
An apparatus currently used for recording an physical impression is a lead impression block. The lead impression block is lowered down into the well and a physical impression is made in the lead of the object. Once an impression has been made, the lead impression block can not be reused and must be disposed of.
SUMMA~tY OF THE INVENTION
What is required is apparatus for recording a physical impression of an object lodged down an oil well, which is reusable.
According to the present invention there is provided an apparatus for making a physical impression of an object lodged down an oil well. The apparatus includes a tubular housing having a first portion with a first end and a second end, a second portion with a first end and a second end and a longitudinal axis. The first end of the second portion is detachably secured to the second end of the first portion. A
coupling is provided at the first end of the first portion of the housing, which is adapted to facilitate connection for the purpose of lowering the housing into an oil well. A rod support is positioned at the second end of the first portion of the housing. A plurality of rods are positioned within the housing. Each of the rods are fractionally engaged and supported by the rod support in an orientation parallel to the longitudinal axis of the housing. Each of the rods has an engagement end extending toward the second end of the second portion of the housing. Each of the rods is independently axially movable from a start=_ng position to an impression position. In the starting position, each of the rods extend to the second end of the second portion of the housing with the engagement end of each rod positioned on a common transverse plane. In the impression position, selected ones of the rods are differing distances into the first portion of the housing. Movement of the rods from the starting position to the impression position is effected by bringing the engagement ends o:E the rods into contact with an object with sufficient force to overcome the frictional engagement with the rod support. The impression position of the rods provides a negative image of the object. A visual inspection of the impression position of the rods is effected by detaching the second portion of the housing from the first portion. The rods are returnable to th.e starting position in preparation for subsequent use.
Although beneficial results may be obtained through the use of the apparatus, as described above, even more beneficial results may be obtained when the rods are made from polymer plastic.. If lost down the well, stainless steel rods can be difficult to recover, for they can not be picked up by a magnet. However, should a polymer plastic rod lost in the well, it can be crushed and ground up with a drill bit.
As will hereinafter be further described, the rod support serves to support and fractionally engage the rods.
In order to promote frictional engagement, beneficial results have been obtained when the rod support includes a series rubber combs. Each of the combs has tines with spaces between tines adapted to fractionally engage the rods. In order to ensure that the rods do not interfere with one another, beneficial results have been obtained when the rod support includes metal alignment plates. The rods pass through apertures in the alignment plates and are, thereby, kept in alignment.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIGURE 1 is a side elevation view, in section, of an apparatus for making a physical impression of an object lodged down an oil well constructed in accordance with the teachings of the present invention with the rods in the starting position.
FIGURE 2 is a side elevation view, in section, of the apparatus for making a physical impression of an object lodged down an oil well as illustrated in FIGURE 1, with the rods in the impression position.
FIGURE 3 is a detailed view of one of the rubber combs from the rod support illustrated in FIGTJRE 1.
FIGURE 4 is a detailed view of one of the metal alignment plates from the rod support illustrated in FIGURE
1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, an apparatus for making a physical impression of an object lodged down an oil well, generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 4.
Structure and Relationship of Parts:
Referring to FIGURE 1, apparatus 10 has a tubular housing 12 having a first portion 14 with a first end 16 and a second end 18, a second portion 20 with a first end 22 and a second end 24 and a longitudinal axis 26. First and 22 of second portion 20 is detachably secured to second end 18 of first portion 14. A coupling 28 is similarly detachably secured to first end 16 of first portion 14 of housing 12.
Coupling 28 is adapted to facilitate connection for the purpose of lowering housing 12 into an oil well. A rod support 30 having two opposed rubber combs 32 is positioned at second end 18 of first portion 14 of housing 12. A
plurality of rods 34 are positioned within housing 12. Each of rods 34 are fractionally engaged and supported by rubber combs 32 within rod support 30 in an orientation parallel to longitudinal axis 26. In the illustrated embodiment, support is also adapted with alignment plates 36. Each of rods 34 has an engagement end 38 extending toward second end 24 of second portion 20 of housing 12 and is independently axially 30 movable from a starting position to an impression position.
In the starting position, each of rods 34 extend to second end 24 of second portion 2C of housing 12 such that engagement end 38 of each rod 34 is positioned on a common transverse plane 40 as illustrated. Referring to FIGURE 2, in the impression position, selected rods of plurality of rods 34 are differing distances into first portion 14 of housing 12. Movement of selected rods 34 from the starting position to the impression position is effected when engagement ends 38 of rods 34 are brought into contact with 5 an object with sufficient force 42 so as to overcome frictional engagement with combs 32 within rod support 30.
Referring to FIGURE 3, rubber comb 32 has tines 44 with spaces 46 adapted to fractionally engage each of rods 32.
Referring to FIGURE 4, metal alignment plate 36 has apertures 48 adapted to align each of rods 34.
Apparatus for recording a physical impression of an object down an oil well FIELD OF THE INVENTION
The present invention relates to an apparatus for recording a physical impression of an object down an oil well.
BACKGROUND OF THE INVENTION
In earth drilling, an obj ect is sometimes lost down the well and it becomes problematic as to how to retrieve it.
When this occurs a physical impression is made of the object.
The physical impression conveys information, which is used to deal with the object.
An apparatus currently used for recording an physical impression is a lead impression block. The lead impression block is lowered down into the well and a physical impression is made in the lead of the object. Once an impression has been made, the lead impression block can not be reused and must be disposed of.
SUMMA~tY OF THE INVENTION
What is required is apparatus for recording a physical impression of an object lodged down an oil well, which is reusable.
According to the present invention there is provided an apparatus for making a physical impression of an object lodged down an oil well. The apparatus includes a tubular housing having a first portion with a first end and a second end, a second portion with a first end and a second end and a longitudinal axis. The first end of the second portion is detachably secured to the second end of the first portion. A
coupling is provided at the first end of the first portion of the housing, which is adapted to facilitate connection for the purpose of lowering the housing into an oil well. A rod support is positioned at the second end of the first portion of the housing. A plurality of rods are positioned within the housing. Each of the rods are fractionally engaged and supported by the rod support in an orientation parallel to the longitudinal axis of the housing. Each of the rods has an engagement end extending toward the second end of the second portion of the housing. Each of the rods is independently axially movable from a start=_ng position to an impression position. In the starting position, each of the rods extend to the second end of the second portion of the housing with the engagement end of each rod positioned on a common transverse plane. In the impression position, selected ones of the rods are differing distances into the first portion of the housing. Movement of the rods from the starting position to the impression position is effected by bringing the engagement ends o:E the rods into contact with an object with sufficient force to overcome the frictional engagement with the rod support. The impression position of the rods provides a negative image of the object. A visual inspection of the impression position of the rods is effected by detaching the second portion of the housing from the first portion. The rods are returnable to th.e starting position in preparation for subsequent use.
Although beneficial results may be obtained through the use of the apparatus, as described above, even more beneficial results may be obtained when the rods are made from polymer plastic.. If lost down the well, stainless steel rods can be difficult to recover, for they can not be picked up by a magnet. However, should a polymer plastic rod lost in the well, it can be crushed and ground up with a drill bit.
As will hereinafter be further described, the rod support serves to support and fractionally engage the rods.
In order to promote frictional engagement, beneficial results have been obtained when the rod support includes a series rubber combs. Each of the combs has tines with spaces between tines adapted to fractionally engage the rods. In order to ensure that the rods do not interfere with one another, beneficial results have been obtained when the rod support includes metal alignment plates. The rods pass through apertures in the alignment plates and are, thereby, kept in alignment.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
FIGURE 1 is a side elevation view, in section, of an apparatus for making a physical impression of an object lodged down an oil well constructed in accordance with the teachings of the present invention with the rods in the starting position.
FIGURE 2 is a side elevation view, in section, of the apparatus for making a physical impression of an object lodged down an oil well as illustrated in FIGURE 1, with the rods in the impression position.
FIGURE 3 is a detailed view of one of the rubber combs from the rod support illustrated in FIGTJRE 1.
FIGURE 4 is a detailed view of one of the metal alignment plates from the rod support illustrated in FIGURE
1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, an apparatus for making a physical impression of an object lodged down an oil well, generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 4.
Structure and Relationship of Parts:
Referring to FIGURE 1, apparatus 10 has a tubular housing 12 having a first portion 14 with a first end 16 and a second end 18, a second portion 20 with a first end 22 and a second end 24 and a longitudinal axis 26. First and 22 of second portion 20 is detachably secured to second end 18 of first portion 14. A coupling 28 is similarly detachably secured to first end 16 of first portion 14 of housing 12.
Coupling 28 is adapted to facilitate connection for the purpose of lowering housing 12 into an oil well. A rod support 30 having two opposed rubber combs 32 is positioned at second end 18 of first portion 14 of housing 12. A
plurality of rods 34 are positioned within housing 12. Each of rods 34 are fractionally engaged and supported by rubber combs 32 within rod support 30 in an orientation parallel to longitudinal axis 26. In the illustrated embodiment, support is also adapted with alignment plates 36. Each of rods 34 has an engagement end 38 extending toward second end 24 of second portion 20 of housing 12 and is independently axially 30 movable from a starting position to an impression position.
In the starting position, each of rods 34 extend to second end 24 of second portion 2C of housing 12 such that engagement end 38 of each rod 34 is positioned on a common transverse plane 40 as illustrated. Referring to FIGURE 2, in the impression position, selected rods of plurality of rods 34 are differing distances into first portion 14 of housing 12. Movement of selected rods 34 from the starting position to the impression position is effected when engagement ends 38 of rods 34 are brought into contact with 5 an object with sufficient force 42 so as to overcome frictional engagement with combs 32 within rod support 30.
Referring to FIGURE 3, rubber comb 32 has tines 44 with spaces 46 adapted to fractionally engage each of rods 32.
Referring to FIGURE 4, metal alignment plate 36 has apertures 48 adapted to align each of rods 34.
Operation:
The use and operation of apparatus for recording a physical impression of an object down an oil well 10 will now be described with reference to FIGURES 1 through 4.
Referring to F2GURE 1, rods 34 are frictionally held by rubber combs 32 of support 30 within housing 12 in the starting position with engagement ends 38 aligned along transverse plane 40. Housing 12 is then connected to coupling 28 and lowered down an oil well. Referring to FIGURE 2. upon contact with an obj ect, force 42 is exercised upon select rods 34, moving them towards first end 16 of first portion 14 according to the profile of the object.
Apparatus 10 is now in the impression position, rods 34 providing a negative image of the object. A visual inspection of the impression position of rods 34 is effected by detaching second portion 20 of housing 12 from first portion 14. Once a diagnosis has beer made, rods 34 are re-aligned within spaces 46 of rubber cornbs 32 and are returned to the starting position in preparation for subsequent use.
Alignment plates 36 keep rods 34 in parallel spaced relationship, so they do not interfere with each others movement. Sometimes a rod 34 may be lost down hole.
According to the teachings of the present invention, if rods 34 are made of polymer plastic, they may easily be broken down by the grinding force provided by the drill bit, eliminating the problem.
In this patent document, the word °°comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
The use and operation of apparatus for recording a physical impression of an object down an oil well 10 will now be described with reference to FIGURES 1 through 4.
Referring to F2GURE 1, rods 34 are frictionally held by rubber combs 32 of support 30 within housing 12 in the starting position with engagement ends 38 aligned along transverse plane 40. Housing 12 is then connected to coupling 28 and lowered down an oil well. Referring to FIGURE 2. upon contact with an obj ect, force 42 is exercised upon select rods 34, moving them towards first end 16 of first portion 14 according to the profile of the object.
Apparatus 10 is now in the impression position, rods 34 providing a negative image of the object. A visual inspection of the impression position of rods 34 is effected by detaching second portion 20 of housing 12 from first portion 14. Once a diagnosis has beer made, rods 34 are re-aligned within spaces 46 of rubber cornbs 32 and are returned to the starting position in preparation for subsequent use.
Alignment plates 36 keep rods 34 in parallel spaced relationship, so they do not interfere with each others movement. Sometimes a rod 34 may be lost down hole.
According to the teachings of the present invention, if rods 34 are made of polymer plastic, they may easily be broken down by the grinding force provided by the drill bit, eliminating the problem.
In this patent document, the word °°comprising" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article "a" does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (4)
1. An apparatus for making a physical impression of an object lodged down an oil well, comprising:
a tubular housing having a first portion with a first end and a second end, a second portion with a first end and a second end and a longitudinal axis, the first end of the second portion being detachably secured to the second end of the first portion;
a coupling at the first end of the first portion of the housing which is adapted to facilitate connection for the purpose of lowering the housing into an oil well;
a rod support positioned at the second end of the first portion of the housing;
a plurality of rods positioned within the housing, each of the rods being fractionally engaged and supported by the rod support in an orientation parallel to the longitudinal axis of the housing, each of the rods having an engagement end extending toward the second end of the second portion of the housing, each of the rods being independently axially movable from a starting position to an impression position, in the starting position each of the rods extend to the second end of the second portion of the housing with the engagement end of each rod positioned on a common transverse plane, in the impression position selected ones of the rods are differing distances into the first portion of the housing, movement of the rods from the starting position to the impression position being effected by bringing the engagement ends of the rods into contact with an object with sufficient force to overcome the frictional engagement with the rod support, with the impression position of the rods providing a negative image of the object, a visual inspection of the impression position of the rods being effected by detaching the second portion of the housing from the first portion, the rods being returnable to the starting position in preparation for subsequent use.
a tubular housing having a first portion with a first end and a second end, a second portion with a first end and a second end and a longitudinal axis, the first end of the second portion being detachably secured to the second end of the first portion;
a coupling at the first end of the first portion of the housing which is adapted to facilitate connection for the purpose of lowering the housing into an oil well;
a rod support positioned at the second end of the first portion of the housing;
a plurality of rods positioned within the housing, each of the rods being fractionally engaged and supported by the rod support in an orientation parallel to the longitudinal axis of the housing, each of the rods having an engagement end extending toward the second end of the second portion of the housing, each of the rods being independently axially movable from a starting position to an impression position, in the starting position each of the rods extend to the second end of the second portion of the housing with the engagement end of each rod positioned on a common transverse plane, in the impression position selected ones of the rods are differing distances into the first portion of the housing, movement of the rods from the starting position to the impression position being effected by bringing the engagement ends of the rods into contact with an object with sufficient force to overcome the frictional engagement with the rod support, with the impression position of the rods providing a negative image of the object, a visual inspection of the impression position of the rods being effected by detaching the second portion of the housing from the first portion, the rods being returnable to the starting position in preparation for subsequent use.
2. The apparatus as defined in Claim 1, wherein the rods are made of polymer plastic, such that should one of the rods be lost in the well it can be crushed with a drill bit.
3. The apparatus as defined in Claim 1, wherein the rod support includes a series rubber combs, each of the combs having tines with spaces between tines adapted to fractionally engage the rods.
4. The apparatus as defined in Claim 3, wherein the rod support includes metal alignment plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002434770A CA2434770C (en) | 2003-07-07 | 2003-07-07 | Apparatus for recording a physical impression of an object down an oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002434770A CA2434770C (en) | 2003-07-07 | 2003-07-07 | Apparatus for recording a physical impression of an object down an oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2434770A1 CA2434770A1 (en) | 2005-01-07 |
| CA2434770C true CA2434770C (en) | 2008-11-25 |
Family
ID=33569514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002434770A Expired - Fee Related CA2434770C (en) | 2003-07-07 | 2003-07-07 | Apparatus for recording a physical impression of an object down an oil well |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2434770C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2493136B (en) * | 2011-07-14 | 2016-08-03 | Weatherford Tech Holdings Llc | Control line space out tool |
| US10954752B2 (en) | 2013-01-31 | 2021-03-23 | Schlumberger Technology Corporation | Impression tool and methods of use |
| CN105626047B (en) * | 2015-12-25 | 2018-11-16 | 中国石油天然气股份有限公司 | A kind of hydraulic lead stamp |
| US11939861B2 (en) | 2021-08-31 | 2024-03-26 | Saudi Arabian Oil Company | Lead-free pinscreen imprint device, system, and method for retrieving at least one imprint of a topmost surface of a fish located in a wellbore |
-
2003
- 2003-07-07 CA CA002434770A patent/CA2434770C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2434770A1 (en) | 2005-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20130709 |