EP0760417A2 - Verfahren und Vorrichtung zum Zusammenbau eines Rohrstranges mit Werkzeugen - Google Patents
Verfahren und Vorrichtung zum Zusammenbau eines Rohrstranges mit Werkzeugen Download PDFInfo
- Publication number
- EP0760417A2 EP0760417A2 EP96305964A EP96305964A EP0760417A2 EP 0760417 A2 EP0760417 A2 EP 0760417A2 EP 96305964 A EP96305964 A EP 96305964A EP 96305964 A EP96305964 A EP 96305964A EP 0760417 A2 EP0760417 A2 EP 0760417A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- tool string
- body member
- support
- support mechanism
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 241000282472 Canis lupus familiaris Species 0.000 description 35
- 210000002445 nipple Anatomy 0.000 description 19
- 239000012530 fluid Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/004—Indexing systems for guiding relative movement between telescoping parts of downhole tools
- E21B23/006—"J-slot" systems, i.e. lug and slot indexing mechanisms
-
- 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/06—Releasing-joints, e.g. safety joints
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/02—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
Definitions
- the invention relates to a method of and apparatus for assembling a tool string.
- Coil tubing is frequently used in boreholes, especially highly deviated boreholes to perform operations within the borehole. It is possible to attach specialised equipment to the end of the coil tubing to perform specific operations in the borehole, such as survey equipment. In general, a number of different tools may be attached to the end of the coil tubing and the attached tools are normally referred to as the "tool string".
- An advantage of using coil tubing is that because the coil tubing itself is relatively rigid and non-flexible compared with wireline, the coil tubing and attached tool string can be pushed along highly deviated wells, such as horizontal wells. Such operations would generally not be possible with wireline.
- a disadvantage of coil tubing is that, due to the inflexible nature of the coil tubing and the type of equipment required to insert the coil tubing into a borehole, problems are encountered when trying to insert relatively long tool strings into the borehole due to space limitations. Hence, it may only be possible to use a relatively short tool string with coil tubing.
- a method of assembling a tool string comprises introducing a body member into a borehole and releasably securing the body member to an internal profile in the borehole, supporting a first portion of the tool string to be assembled on the body member to support the said portion in the borehole, introducing a second portion of the tool string into the borehole, coupling the second portion to the first portion to assemble the tool string, and subsequently releasing the assembled tool string from the body member.
- apparatus for assembling a tool string in a borehole comprises a body member, a coupling mechanism on the body member to releasably secure the body member to an internal profile in the borehole, and a support mechanism on the body member, the support mechanism being movable between a support position, in which the tool string or a portion thereof is supported on the body member, and a first release position, in which the tool string or the portion is released from the body member.
- the invention has the advantage of permitting a tool string to be assembled within a borehole and is especially, but not solely, useful for assembling tool strings for coil tubing.
- the internal profile to which the apparatus is releasably secured may take the form of a landing nipple in a tubing string.
- the body member is tubular with a through bore having a longitudinal axis, which is substantially parallel to the longitudinal axis of the portion of the borehole in which the body member is releasably secured, in use.
- the first portion of the tool string is supported within the through bore of the body member and the second portion may enter the through bore to couple to the first portion.
- the support mechanism may include an indexing mechanism to guide the support mechanism between the support position and the first release position.
- the support mechanism is provided with a second release position and typically, the support position is located between the two release positions.
- the support mechanism may include a first movable member which engages a first shoulder on a tool forming part of the first portion of the tool string when in the support position, and moves out of engagement with the first shoulder when in the first release position.
- the first movable member is biassed to the support position from the first release position.
- the first movable member is a dog which is typically located in a movable sleeve mounted on the body member.
- a second movable member which engages with a second shoulder on the first portion of the tool string when the support mechanism in the support position, and which moves out of engagement with the second shoulder when the support mechanism is in the first release position or the second release position.
- the support position and the first release position, and the second release position if present are aligned in a direction which is substantially parallel to the longitudinal axis of the body member.
- the second release position is used to aid disassembly of the tool string in order to recover the tool string from the borehole.
- Fig. 1 shows a tubing string 1 located within a borehole and a landing nipple 2 located on the tubing string 1.
- the landing nipple 2 has an internal profile 3.
- Apparatus 4 is located in the landing nipple 2.
- the apparatus 4 comprises a connection sub 5 which is threadedly coupled to a locking slide 6.
- the locking slide 6 is located within an upper body member 7 which includes a number of sprung fingers 8 (only one shown). Each of the sprung fingers 8 has a head portion 9 which engages with the internal profile 3 of the landing nipple 2.
- the upper body member 7 also includes a shear pin 10 and a spring loaded shear pin 11.
- the upper body member 7 is threadedly coupled at its lower end to a lower body member 12 which has a downwardly facing shoulder 13 on its outer surface which engages with a shoulder 14 on the landing nipple 2.
- the lower body member 12 has a sleeve slide 15 located within it.
- Two helical springs 16, 17 are positioned at either end of the slide 15.
- a bottom sub 18 is attached to the lower end of the lower body member 12 and mounted on the sub 18 is an indexing pin 19 which engages with an indexing slot 20 formed in the slide 15.
- the indexing slot 20 is continuous around the slide 15.
- Located within the sleeve 15 is a dog 21.
- the lower body member 12 also has two recesses 22, 23 into which the dog 21 may move when the sleeve 15 has moved against the biassing action of either of the springs 17, 16 so that the dog 21 coincides with either of the recesses 22, 23.
- Also shown in Fig. 1 is the top end of a tool 24 which is to form part of a coil tubing tool string, as will be explained below.
- the upper end of the tool 24 includes a downwardly facing shoulder 25 which engages with the dog 21 when in the position shown in Fig. 1 and a connector profile 26 which takes the form of an enlarged head on the upper end of the tool 24.
- the tool 24 is inserted into the apparatus 4 on the surface and the apparatus 4 with the tool 24 extending from it may be inserted into the tubing string 1 via conventional wireline or coil tubing operations.
- the apparatus 4 is lowered until the shoulder 13 on the lower body member 12 hits shoulder 14 on the landing nipple 2. In this position the heads 9 of the sprung fingers 8 will engage the internal profile 3 on the landing nipple 2.
- the locking slide 6 is retained in the position shown in Fig. 1 during lowering of the assembly into the tubing string 1 by means of the shear pin 10 which locks the locking slide 6 to the upper body member 7.
- connection sub 5 and locking slide 6 are connected to shear the shear pin 10.
- This then permits the locking slide 6 to move to the position shown in Fig. 2, in which the connection sub 5 abuts against the top end of the upper member 7 and locking heads 27 of the locking slide 6 abut against the heads 9 of the sprung fingers 8 to prevent the heads 9 becoming disengaged from the internal profile 3.
- the sprung shear pin 11 can extend into recess 28 in the locking slide 6 to retain the locking slide 6 in the position shown in Fig. 2.
- the wireline or coil tubing used to run the apparatus 4 into the landing nipple is disconnected from the connection sub 5 and retrieved to the surface.
- the coil tubing to which the tool string is to be attached is prepared and the desired upper portion of the tool string is attached to the lower end of the coil tubing and inserted into the tubing string 1 in a conventional manner.
- the upper portion of the tool string is then lowered on the end of the coil tubing until a connection sub 29 on the lower end of the upper portion of the tool string contacts the top end of the tool 24.
- the connection sub 29 includes a lower mandrel 30 which engages with the central bore of the tool 24.
- the outer shape of the mandrel 30 is preferably non-circular and the central bore of tool 24 is also non-circular to prevent the mandrel 30 rotating with respect to the tool 24.
- a central body member 31 Threadedly attached to the lower mandrel 30 is a central body member 31 and threadedly coupled to the other end of the central body member 31 is an upper sub 32. Slidably located on the outside of the central body member 31 is a sleeve 33 to which is attached a number of sprung fingers 34 with engagement heads 35. The coil tubing and the connection sub 29 is lowered until it reaches the position shown in Fig. 3.
- the heads 26 and 35 abut against each other and further downward movement of the connection sub 29 causes the fingers 34 and sleeve 33 to remain stationary with respect to the landing nipple 2, as the head 26 pushes the sprung fingers 34 and sleeve 33 against the action of the spring 36 as the lower mandrel 30 moves further into the tool 24 and the connection sub 32 and central body member 31 move downwards.
- This downward movement of the central body member 31 while the fingers 34 remain stationary with respect to the landing nipple 2 permits the heads 35 on the fingers 34 to enter recess 37 in the central body member 31.
- the heads 35 when in this position then ride underneath the head 26 and move to the position shown in Fig. 4 in which the connection sub 29, and therefore the upper portion of the tool string attached to the lower end of the coil tubing, is coupled to the tool 24 by means of the heads 26, 35.
- the configuration of the indexing slot 20 is shown schematically in Fig. 5.
- the indexing pin 19 is at position 50.
- the pin Prior to inserting the tool 24 into the apparatus 4 and the weight of tool 24 being supported by dog 21, the pin is in an unloaded equilibrium position 49.
- pin 19 moves along the slot 20 in the slide 15 to position 50.
- an upward force is applied to the coil tubing so that the head 35 pulls against the head 26. This removes weight from the dog 21 and permits the slide 15 to return to its equilibrium position which moves the indexing pin 19 along slot 20 to the position 51 shown in Fig. 5.
- the operator may then carry out the desired operations in the borehole using the assembled tool string.
- fluid is pumped into the coil tubing at a high enough pressure to open ports 38 in the central body member 31 which permit fluid to enter the fluid cavity 39.
- the pressure of the fluid entering the fluid cavity 39 causes the fingers 34 and slide 33 to move against the action of spring 36 so that the head 35 of fingers 34 enter recess 37 in the central body member 31 at which point the upper portion of the tool string and connector 29 may be removed from the upper end of the lower portion of tool 24.
- the tool 24 is supported by locking dog 21 on the apparatus 4.
- coil tubing and upper portion of the tool string may then be rerun into the hole or wireline run into the hole to engage the connector sub 5.
- Upward jarring on the connector sub 5 then shears pin 11 and further upward movement exerted on the connection sub 5 moves the locking slide 6 and heads 27 to the position shown in Fig. 1.
- the slide 15 reverts to its equilibrium position and pin 19 moves to position 51.
- Fig. 6 is a partial cross-sectional view through a second example of apparatus 60 for assembling a tool string in a landing nipple in a bore hole.
- the apparatus 60 comprises a deployment tool 61 which is connected to a running tool 62 for running the deployment tool and setting the deployment tool in a nipple in a borehole.
- a tool 71 which is to form part of a coil tubing tool string, as explained below.
- the deployment tool 61 is substantially the same as the apparatus 4 described above in Figs. 1 to 5.
- the deployment tool 61 includes a pair of dogs 63, 64 on a slide 65 which slides within a lower body member 66 which has three locking dog recesses 67, 68, 69.
- an indexing slot 70 (see Fig. 7) in slide 65 has a different configuration to the indexing slot 20.
- the parts of the deployment tool 61 which are the same as the apparatus 4, have been given the same reference numerals.
- the upper end of the tool 71 has two shoulders 72, 73 which are supported by dogs 63, 64, respectively.
- An advantage of the deployment tool 61 is that by providing two support dogs 63, 64 and a modified indexing slot 70, additional security is provided to help prevent tool 71 falling into the bore hole in the event that the upper end of the tool 71 is not properly engaged with an upper tool prior to tool 71 being released from engagement with the dogs 63, 64.
- the apparatus 60 and the deployment tool 61 are used in a similar manner to the apparatus 4.
- the tool 71 is inserted into the deployment tool 61 on the surface and the deployment tool 61 with the tool 71 is inserted into the tubing string via the running tool 62 using conventional wireline or coil tubing.
- the deployment tool 61 is set in a landing nipple in the same manner as for the apparatus 4 described above.
- the pin 19 is initially in position 75 in slot 70 (see Fig. 7) and moves to position 76 when the weight of the tool 71 is supported by the dogs 63, 64.
- an overpull is applied to the coil tubing to ensure that tools 71 and the second tool are properly connected.
- the pin 19 moves to the position 77.
- weight is set down on the tool 71 to move the pin 19 to the position 78 in slot 70.
- a further pull upwards on the coil tubing removes the weight of tool 71 from the dogs 63, 64 and permits the pin 19 to move to position 79 in the slot 70.
- Setting weight down on tool 71 then moves pin 19 to position 80 in which the locking dogs 63, 64 may enter the recesses 69, 68, respectively.
- the operation is the same as that described above for the apparatus 4 and position 81 in the slot 70 corresponds to position 54 in the indexing slot 20 for the apparatus 4.
- both the apparatus 4 and the deployment tool 61 may be used for multiple connections of coil tubing tools.
- a shoulder 25 is provided on the upper end of each tool to be connected.
- the dog 21 is free to return to the equilibrium position.
- the weight of the tool above applied to the dog 21 through the shoulder 25 on the tool above will then cause the pin 19 to move to position 50 and further tool or tools may be connected to the tool now supported by the dogs 21.
- support shoulders 72, 73 are provided on the upper end of each connecting tool.
- the dogs 63, 64 will be free to return to the equilibrium position and the next support shoulders on the tool above the tool 71 engage with the dogs 63, 64. This causes the pin 19 to move to position 76 via equilibrium position 75. In this manner the deployment tool 61 can be used to connect a number of coil tubing tools together.
- the invention has the advantage of permitting relatively long tool strings which could not normally be used with coil tubing, to be used with coil tubing by assembling the tool string within the borehole.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9516917.3A GB9516917D0 (en) | 1995-08-18 | 1995-08-18 | A method of and apparatus for assembling a tool string |
GB9516917 | 1995-08-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0760417A2 true EP0760417A2 (de) | 1997-03-05 |
EP0760417A3 EP0760417A3 (de) | 1997-12-10 |
Family
ID=10779408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96305964A Withdrawn EP0760417A3 (de) | 1995-08-18 | 1996-08-15 | Verfahren und Vorrichtung zum Zusammenbau eines Rohrstranges mit Werkzeugen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0760417A3 (de) |
CA (1) | CA2183505A1 (de) |
GB (1) | GB9516917D0 (de) |
NO (1) | NO963437L (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2393195A (en) * | 2002-08-06 | 2004-03-24 | Varco Int | Tool string deployment apparatus |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4407364A (en) * | 1981-01-27 | 1983-10-04 | Otis Engineering Corporation | Landing nipple for pumpdown well completion system |
US4844160A (en) * | 1988-03-14 | 1989-07-04 | Otis Engineering Corporation | Parking mandrel |
WO1992009784A1 (en) * | 1990-12-03 | 1992-06-11 | Phoenix Petroleum Services Ltd. | Plugs for well logging operations |
GB2281088A (en) * | 1993-08-16 | 1995-02-22 | Phoenix Petroleum Services | Logging plug for use in oil, gas and other wells |
-
1995
- 1995-08-18 GB GBGB9516917.3A patent/GB9516917D0/en active Pending
-
1996
- 1996-08-15 EP EP96305964A patent/EP0760417A3/de not_active Withdrawn
- 1996-08-16 NO NO963437A patent/NO963437L/no unknown
- 1996-08-16 CA CA002183505A patent/CA2183505A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4407364A (en) * | 1981-01-27 | 1983-10-04 | Otis Engineering Corporation | Landing nipple for pumpdown well completion system |
US4844160A (en) * | 1988-03-14 | 1989-07-04 | Otis Engineering Corporation | Parking mandrel |
WO1992009784A1 (en) * | 1990-12-03 | 1992-06-11 | Phoenix Petroleum Services Ltd. | Plugs for well logging operations |
GB2281088A (en) * | 1993-08-16 | 1995-02-22 | Phoenix Petroleum Services | Logging plug for use in oil, gas and other wells |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2393195A (en) * | 2002-08-06 | 2004-03-24 | Varco Int | Tool string deployment apparatus |
GB2393195B (en) * | 2002-08-06 | 2005-11-23 | Varco Int | Remote operated tool string deployment apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP0760417A3 (de) | 1997-12-10 |
CA2183505A1 (en) | 1997-02-19 |
NO963437D0 (no) | 1996-08-16 |
GB9516917D0 (en) | 1995-10-18 |
NO963437L (no) | 1997-02-19 |
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18D | Application deemed to be withdrawn |
Effective date: 19980611 |