CA2562891A1 - A telescopic conductor casing for a well installation and a method of driving same into the underground - Google Patents
A telescopic conductor casing for a well installation and a method of driving same into the underground Download PDFInfo
- Publication number
- CA2562891A1 CA2562891A1 CA002562891A CA2562891A CA2562891A1 CA 2562891 A1 CA2562891 A1 CA 2562891A1 CA 002562891 A CA002562891 A CA 002562891A CA 2562891 A CA2562891 A CA 2562891A CA 2562891 A1 CA2562891 A1 CA 2562891A1
- Authority
- CA
- Canada
- Prior art keywords
- outer pipe
- conductor casing
- inner pipe
- pipe
- accordance
- 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.)
- Abandoned
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000009434 installation Methods 0.000 title description 10
- 239000013049 sediment Substances 0.000 claims abstract description 46
- 239000003381 stabilizer Substances 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000000087 stabilizing effect 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
- 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
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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)
- Geophysics And Detection Of Objects (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Foundations (AREA)
- Earth Drilling (AREA)
Abstract
A conductor casing device (1) for establishing and lining a wellbore in unconsolidated sediments (51), the conductor casing (1) being arranged to be driven into and to displace the unconsolidated sediments (51) by axially directed impulses against an internal abutment (19) in the lower portion (15) of the conductor casing (1), where the conductor casing (1) is telescopic. The invention also comprises a method of driving a telescopic conductor casing (1) into unconsolidated sediments (51).
Description
A TELESCOPIC CONDUCTOR CASING FOR A WELL INSTALLATION AND A
METHOD OF DRIVING SAME INTO THE UNDERGROUND
The invention regards a telescopic conductor casing for a well installation, preferably a sub sea hydrocarbon well, s more particularly a telescopic conductor casing in which an outer pipe is releasably coupled to an inner pipe, the lower end of which comprises means of cooperating with a driving mechanism. When the conductor casing has been driven far enough into the unconsolidated sediments so as to project a to prescribed distance above the surface of the unconsolidated sediments, the outer pipe is separated from the inner pipe.
The inner pipe is driven further into the unconsolidated sediments until it encounters so lid sediments or reaches the planned driving depth. A device by the lower end of the outer 15 pipe ensures that the outer pipe cannot be pushed down on the outside the inner pipe. The invention also comprises a method of driving a telescopic conductor casing into the ground.
When establishing a well such as a hydrocarbon well in an area with unconsolidated sediments above the rock structures, zo it is necessary to insert a con~.uctor casing through the unconsolidated sediments. The conductor casing separates the wellbore from the unconsolidatec7. sediments and acts as a foundation for installations (wallhead, BOP etc.) at the P24603PCOODeprio - 07. 04.2005 surface of the unconsolidated sediments. The installations will, in accordance with regulations, be placed at a certain height relative to the surface, i.e. ground surface or seabed. Analyses of the unconsolidated sediments form the s basis for the selection of a conductor casing length, which in all probability can be driven far enough down for the upper end of the conductor casing to attain a prescribed height above the unconsolidated sediments. When there is uncertainty with regards to the condition of the to unconsolidated sediments, the length of the conductor casing may be to great or too small, and it becomes necessary, particularly when establishing a sub sea well, to carry out complicated operations to lengthen or shorten the conductor casing so as to achieve the correct height for the upper end is of the casing.
The object of the invention is to remedy the disadvantages of prior art. In particular, the object is to reduce the cost and practical effects of the uncertainty involved in estimating how far the conductor casing can be driven.
~o The invention also allows the installation of long conductor casings without requiring additional conductor casing sections to be added during the driving.
The object is achieved by the characteristics given in the description below and in the following claims.
2s A telescopic conductor casing according to the invention is arranged in a known manner to be driven into unconsolidated sediments by means of axially directed impulses against internally placed impact surfaces, preferably in the lower portion of an inner pipe. The inner pipe is removably coupled so to an outer pipe, preferably by an upper portion of the inner pipe being coupled to an upper portion of the outer pipe.
P24603PCOODeprio - 07.04.2005 In the lower portion of the outer pipe there is provided, in a non-displaceable manner, one or more locking members abutting the outside wall of the inner pipe. The locking elements) is/are arranged to allow an inner pipe released from the outer pipe to move axially away from the upper portion of the outer pipe. The locking elements) is/are furthermore arranged to prevent an outer pipe released from the inner pipe to move axially towards the lower portion of the inner pipe.
to Preferably, the outer pipe is arranged to receive one or more known stabilizers located externally. This is particularly relevant when the conductor casing is to be placed in unstable unconsolidated sediments. The stabilizers causes the conductor casing to present a greater abutment surface to the unconsolidated sediments, whereby the unconsolidated sediments can accommodate a greater load directed radially of the pipe.
Preferably, the outer pipe is provided with one or more stops arranged to abut an upper portion of the stabilizer(s). This 2o makes it possible to place the stabilizers) at a predefined level relative to the surface of the unconsolidated sediments when they are driven into the unconsolidated sediments along with the outer pipe.
The invention further comprises a method of driving a a5 conductor casing into unconsolidated sediments in order to line a wellbore, the conductor casing being arranged to be driven into the unconsolidated sediments by axially directed impulses against an internal abutment in the lower portion of the conductor casing, where:
so - an outer pipe is removably coupled to the upper portion of an inner pipe;
- the compound telescopic conductor casing is driven into the unconsolidated sediments until the upper portion of the outer pipe assumes a prescribed distance from the surface of P24603PCOODepr-io - 07.04.2005 the unconsolidated sediments;
- the outer pipe is released from the inner pipe;
- the inner pipe is driven further into the unconsolidated sediments until it reaches the planned driving depth or until s no further driving is possible, the inner pipe moving away from the upper portion of the outer pipe in the axial direction.
Preferably, the method comprises the provision of one or more stabilizers on the outer pipe prior to driving this into the to unconsolidated sediments.
The following describes a non-limiting example of a preferred embodiment illustrated in the accompanying drawings, in which:
Figure 1 shows a longitudinal section through an assembled 15 to lescopic conductor casing according to the invention;
Figure 2 shows a longitudinal section, on a smaller scale, through an assembled telescopic conductor casing being driven into unconsolidated sediments;
Figure 3 shows a longitudinal section through the telescopic ~o conductor casing being driven into unconsolidated sediments, with an inner pipe sliding in a disconnected outer pipe;
Figure 4 shows a side view of a conductor casing corresponding to the longitudinal section of figure 3, but where the outer pipe is provided with a stabilizer; and z5 Figure 5 shows a top view of the conductor casing in figure 4.
P24603PCOODepri~ - 07.04.2005 Reference is first made figure 1, in which a telescopic conductor casing 1 comprises an inner pipe 3, an outer pipe 5, an annular coupling device 7 and also an annular locking member 9.
s The upper portion 11 of the inner pipe 3 is provided with an annular coupling groove 13. A lower portion 15 of the inner pipe 3 is provided with a driving shoe 17 with an internal striking surface 19.
An upper portion 21 of the outer pipe 5 is provided with an so external coupling section 23 capable of receiving and retaining a well installation (not shown). The outside of a central portion 25 of the outer pipe has annular stabilizing stops 27. A lower portion 28 of the outer pipe is provided with an internal annular locking groove 29.
is The coupling device 7 has an internal coupling section 31 that extends from a lower central opening 33. The threaded portion 31 of the coupling device 7 is a complementary fit to the coupling section 23 on the outer pipe 5. An upper bore 35 is a complementary fit to the outer diameter of the inner ao pipe 3. An annular shoulder 37 is a complementary fit to the coupling groove 13 on the inner pipe 3. The coupling device is removable, being divisible (not shown) by means of a tool-bearing remote operated vehicle (not shown).
The locking element 9 is shaped like an annular disk spring as with a convex ring surface 41 facing the lower end 15 of the outer pipe 5. An internal lip 43 tightly abuts the outer wall of the inner pipe 3.
Reference is now made essentially to figures 2 and 3. The conductor casing 1 has been driven into unconsolidated 3o sediments 51 by means of an internally placed hammer 61, 63 connected to a driving and control mechanism (not shown) via P24603PCOODeprio - 07. 04.2005 a cable 65. The hammer 61, 63 can transmit driving impulses to the conductor casing via the impact surface 19.
In an alternative embodiment the conductor casing 1 is provided with a cylindrical stabilizer 71 enclosing portions of the outer pipe 5. A central pipe 73 encloses the outer pipe 5 coaxially and abuts the stabilizer stop 27 when in the active position. A cylindrical jacket 77 is coaxial with the central pipe 73 and is rigidly connected to this by several supporting ribs 75 that project in the radial direction from to the central pipe 73 and extend along the entire axial length of the stabilize r 71.
Prior to driving a conductor casing 1 into the ground, the unconsolidated sediments 51 are analysed to find out how far the conductor ca sing 1 can be driven and how much uncertainty exists around this analysis, i.e. what is the expected maximum driving depth and what is the estimated minimum driving depth. Then a length of inner pipe 3 is selected which under no circumstances will cause the inner pipe 3 to protrude above the unconsolidated sediments by more than what zo is prescribed for a well installation which is subsequently to be installed on the conductor casing 1. Also, the length of the outer pipe 5 is selected to be such that the outer pipe 5, when pro truding above the unconsolidated sediments 51 as prescribed with regard to the well installation, overlaps as the inner pipe when this has been driven down to the maximum depth.
The conductor casing 1 is driven into the unconsolidated sediments 51 in a manner that is known per se, by the hammer 61, 63 partly making a hole by penetrating into the 3o unconsolidated sediments 51 and forcing them aside and partly hammering the conductor casing into the unconsolidated sediments 51 through impacts against the impact surface 19 on the driving shoe 17. During the first part of the driving, P24603PCOODeprio - 07. 04.2005 the coupling device 7 interconnects the inner and outer pipes 3, 5 of the conductor casing 1.
When the outer pipe 5 has reached a prescribed depth, i.e. it protrudes above the unc onsolidated sediments 51 at a s prescribed height, the coupling device 7 is removed; at a sub sea installation preferably through use of tools on a remote operated vehicle (ROV).
The driving then continues, the inner pipe 3 moving axially through the outer pipe 5 by sliding through the locking so member 9. When the inner pipe 3 has reached its maximum depth the hammer 61, 63 is retrieved from the conductor casing 1.
In the alternative embodiment where the outer pipe 5 has a stabilizer 71, this is driven into the unconsolidated sediments together with the outer pipe 5, the central pipe 73 i5 of the stabilizer 71 abutting the stabilizer stop 27. The large surface area of the jacket 77 ensures, in a manner that is known per se, an increase in the lateral stability of the conductor casing 1 when placed in unstable unconsolidated sediments 51.
2o The conical shape of the locking member 9 ensures that the outer pipe 5 will not s lip down the inner pipe 3 under stress, as the internal lip 43 of the locking member 9 will seize against the surface of the inner pipe 3.
The conductor casing 1 according the invention can assume a z.s wide range of dimensions, as the inner pipe can assume all relevant dimensions according to industrial practice.
P24603PCOODeprio - 07.04.2005
METHOD OF DRIVING SAME INTO THE UNDERGROUND
The invention regards a telescopic conductor casing for a well installation, preferably a sub sea hydrocarbon well, s more particularly a telescopic conductor casing in which an outer pipe is releasably coupled to an inner pipe, the lower end of which comprises means of cooperating with a driving mechanism. When the conductor casing has been driven far enough into the unconsolidated sediments so as to project a to prescribed distance above the surface of the unconsolidated sediments, the outer pipe is separated from the inner pipe.
The inner pipe is driven further into the unconsolidated sediments until it encounters so lid sediments or reaches the planned driving depth. A device by the lower end of the outer 15 pipe ensures that the outer pipe cannot be pushed down on the outside the inner pipe. The invention also comprises a method of driving a telescopic conductor casing into the ground.
When establishing a well such as a hydrocarbon well in an area with unconsolidated sediments above the rock structures, zo it is necessary to insert a con~.uctor casing through the unconsolidated sediments. The conductor casing separates the wellbore from the unconsolidatec7. sediments and acts as a foundation for installations (wallhead, BOP etc.) at the P24603PCOODeprio - 07. 04.2005 surface of the unconsolidated sediments. The installations will, in accordance with regulations, be placed at a certain height relative to the surface, i.e. ground surface or seabed. Analyses of the unconsolidated sediments form the s basis for the selection of a conductor casing length, which in all probability can be driven far enough down for the upper end of the conductor casing to attain a prescribed height above the unconsolidated sediments. When there is uncertainty with regards to the condition of the to unconsolidated sediments, the length of the conductor casing may be to great or too small, and it becomes necessary, particularly when establishing a sub sea well, to carry out complicated operations to lengthen or shorten the conductor casing so as to achieve the correct height for the upper end is of the casing.
The object of the invention is to remedy the disadvantages of prior art. In particular, the object is to reduce the cost and practical effects of the uncertainty involved in estimating how far the conductor casing can be driven.
~o The invention also allows the installation of long conductor casings without requiring additional conductor casing sections to be added during the driving.
The object is achieved by the characteristics given in the description below and in the following claims.
2s A telescopic conductor casing according to the invention is arranged in a known manner to be driven into unconsolidated sediments by means of axially directed impulses against internally placed impact surfaces, preferably in the lower portion of an inner pipe. The inner pipe is removably coupled so to an outer pipe, preferably by an upper portion of the inner pipe being coupled to an upper portion of the outer pipe.
P24603PCOODeprio - 07.04.2005 In the lower portion of the outer pipe there is provided, in a non-displaceable manner, one or more locking members abutting the outside wall of the inner pipe. The locking elements) is/are arranged to allow an inner pipe released from the outer pipe to move axially away from the upper portion of the outer pipe. The locking elements) is/are furthermore arranged to prevent an outer pipe released from the inner pipe to move axially towards the lower portion of the inner pipe.
to Preferably, the outer pipe is arranged to receive one or more known stabilizers located externally. This is particularly relevant when the conductor casing is to be placed in unstable unconsolidated sediments. The stabilizers causes the conductor casing to present a greater abutment surface to the unconsolidated sediments, whereby the unconsolidated sediments can accommodate a greater load directed radially of the pipe.
Preferably, the outer pipe is provided with one or more stops arranged to abut an upper portion of the stabilizer(s). This 2o makes it possible to place the stabilizers) at a predefined level relative to the surface of the unconsolidated sediments when they are driven into the unconsolidated sediments along with the outer pipe.
The invention further comprises a method of driving a a5 conductor casing into unconsolidated sediments in order to line a wellbore, the conductor casing being arranged to be driven into the unconsolidated sediments by axially directed impulses against an internal abutment in the lower portion of the conductor casing, where:
so - an outer pipe is removably coupled to the upper portion of an inner pipe;
- the compound telescopic conductor casing is driven into the unconsolidated sediments until the upper portion of the outer pipe assumes a prescribed distance from the surface of P24603PCOODepr-io - 07.04.2005 the unconsolidated sediments;
- the outer pipe is released from the inner pipe;
- the inner pipe is driven further into the unconsolidated sediments until it reaches the planned driving depth or until s no further driving is possible, the inner pipe moving away from the upper portion of the outer pipe in the axial direction.
Preferably, the method comprises the provision of one or more stabilizers on the outer pipe prior to driving this into the to unconsolidated sediments.
The following describes a non-limiting example of a preferred embodiment illustrated in the accompanying drawings, in which:
Figure 1 shows a longitudinal section through an assembled 15 to lescopic conductor casing according to the invention;
Figure 2 shows a longitudinal section, on a smaller scale, through an assembled telescopic conductor casing being driven into unconsolidated sediments;
Figure 3 shows a longitudinal section through the telescopic ~o conductor casing being driven into unconsolidated sediments, with an inner pipe sliding in a disconnected outer pipe;
Figure 4 shows a side view of a conductor casing corresponding to the longitudinal section of figure 3, but where the outer pipe is provided with a stabilizer; and z5 Figure 5 shows a top view of the conductor casing in figure 4.
P24603PCOODepri~ - 07.04.2005 Reference is first made figure 1, in which a telescopic conductor casing 1 comprises an inner pipe 3, an outer pipe 5, an annular coupling device 7 and also an annular locking member 9.
s The upper portion 11 of the inner pipe 3 is provided with an annular coupling groove 13. A lower portion 15 of the inner pipe 3 is provided with a driving shoe 17 with an internal striking surface 19.
An upper portion 21 of the outer pipe 5 is provided with an so external coupling section 23 capable of receiving and retaining a well installation (not shown). The outside of a central portion 25 of the outer pipe has annular stabilizing stops 27. A lower portion 28 of the outer pipe is provided with an internal annular locking groove 29.
is The coupling device 7 has an internal coupling section 31 that extends from a lower central opening 33. The threaded portion 31 of the coupling device 7 is a complementary fit to the coupling section 23 on the outer pipe 5. An upper bore 35 is a complementary fit to the outer diameter of the inner ao pipe 3. An annular shoulder 37 is a complementary fit to the coupling groove 13 on the inner pipe 3. The coupling device is removable, being divisible (not shown) by means of a tool-bearing remote operated vehicle (not shown).
The locking element 9 is shaped like an annular disk spring as with a convex ring surface 41 facing the lower end 15 of the outer pipe 5. An internal lip 43 tightly abuts the outer wall of the inner pipe 3.
Reference is now made essentially to figures 2 and 3. The conductor casing 1 has been driven into unconsolidated 3o sediments 51 by means of an internally placed hammer 61, 63 connected to a driving and control mechanism (not shown) via P24603PCOODeprio - 07. 04.2005 a cable 65. The hammer 61, 63 can transmit driving impulses to the conductor casing via the impact surface 19.
In an alternative embodiment the conductor casing 1 is provided with a cylindrical stabilizer 71 enclosing portions of the outer pipe 5. A central pipe 73 encloses the outer pipe 5 coaxially and abuts the stabilizer stop 27 when in the active position. A cylindrical jacket 77 is coaxial with the central pipe 73 and is rigidly connected to this by several supporting ribs 75 that project in the radial direction from to the central pipe 73 and extend along the entire axial length of the stabilize r 71.
Prior to driving a conductor casing 1 into the ground, the unconsolidated sediments 51 are analysed to find out how far the conductor ca sing 1 can be driven and how much uncertainty exists around this analysis, i.e. what is the expected maximum driving depth and what is the estimated minimum driving depth. Then a length of inner pipe 3 is selected which under no circumstances will cause the inner pipe 3 to protrude above the unconsolidated sediments by more than what zo is prescribed for a well installation which is subsequently to be installed on the conductor casing 1. Also, the length of the outer pipe 5 is selected to be such that the outer pipe 5, when pro truding above the unconsolidated sediments 51 as prescribed with regard to the well installation, overlaps as the inner pipe when this has been driven down to the maximum depth.
The conductor casing 1 is driven into the unconsolidated sediments 51 in a manner that is known per se, by the hammer 61, 63 partly making a hole by penetrating into the 3o unconsolidated sediments 51 and forcing them aside and partly hammering the conductor casing into the unconsolidated sediments 51 through impacts against the impact surface 19 on the driving shoe 17. During the first part of the driving, P24603PCOODeprio - 07. 04.2005 the coupling device 7 interconnects the inner and outer pipes 3, 5 of the conductor casing 1.
When the outer pipe 5 has reached a prescribed depth, i.e. it protrudes above the unc onsolidated sediments 51 at a s prescribed height, the coupling device 7 is removed; at a sub sea installation preferably through use of tools on a remote operated vehicle (ROV).
The driving then continues, the inner pipe 3 moving axially through the outer pipe 5 by sliding through the locking so member 9. When the inner pipe 3 has reached its maximum depth the hammer 61, 63 is retrieved from the conductor casing 1.
In the alternative embodiment where the outer pipe 5 has a stabilizer 71, this is driven into the unconsolidated sediments together with the outer pipe 5, the central pipe 73 i5 of the stabilizer 71 abutting the stabilizer stop 27. The large surface area of the jacket 77 ensures, in a manner that is known per se, an increase in the lateral stability of the conductor casing 1 when placed in unstable unconsolidated sediments 51.
2o The conical shape of the locking member 9 ensures that the outer pipe 5 will not s lip down the inner pipe 3 under stress, as the internal lip 43 of the locking member 9 will seize against the surface of the inner pipe 3.
The conductor casing 1 according the invention can assume a z.s wide range of dimensions, as the inner pipe can assume all relevant dimensions according to industrial practice.
P24603PCOODeprio - 07.04.2005
Claims (11)
1. A conductor casing device (1) for establishing and lining a wellbore in unconsolidated sediments (51), the conductor casing (1) being arranged to be driven into and to displace the unconsolidated sediments (51) by axially directed impulses against an internal abutment (19) in the lower portion (15) of the conductor casing (1), characterized in that the conductor casing (1) is telescopic.
2. A device in accordance with Claim 1, characterized in that an outer pipe (5) is releasably coupled to an inner pipe (3) by means of a coupling device (7).
3. A device in accordance with Claim 1, characterized in that an upper portion (21) of the outer pipe (5) is releasably coupled to an upper portion (11) of the inner pipe (3).
4. A device in accordance with Claim 1, characterized in that one or more locking members (9) abutting the outside wall of the inner pipe (3) are arranged in a non-displaceable manner in the lower portion (28) of the outer pipe (5).
5. A device in accordance with Claim 1, characterized in that the locking member(s) is/are arranged to allow an inner pipe (3) released from the outer pipe (5) to move axially away from the upper portion (21) of the outer pipe (5).
6. A device in accordance with Claim 1, characterized in that that the locking member(s) is/are arranged to prevent an outer pipe (5) released from the inner pipe (3) to move axially towards the lower portion (15) of the inner pipe (3).
7. A device in accordance with Claim 1, characterized in that the outer pipe (5) is arranged to receive one or more externally placed stabilizers (71).
8. A device in accordance with Claim 7, characterized in that the outer pipe (5) is provided with one or more stops (7) arranged to abut an upper portion of the stabilizer(s).
9. A device in accordance with Claim 1, characterized in that the lower portion (15) of the inner pipe (3) is provided with a driving shoe (17) arranged to receive axially directed driving impulses.
10. A method of driving a conductor casing (1) into unconsolidated sediments (51) in order to establish and line a wellbore, the conductor casing (1) being arranged to be driven into and to displace the unconsolidated sediments (51) through axially directed impulses against an internal abutment (19) in the lower portion (15) of the conductor casing (1), characterized in that - an outer pipe (5) is releasably coupled to the upper portion (11) of an inner pipe (3);
- the assembled telescopic conductor casing (1) is driven into the unconsolidated sediments (51) until the upper portion (21) of the outer pipe (5) assumes a prescribed height above the surface of the unconsolidated sediments (51);
- the outer pipe (5) is released from the inner pipe (3);
- the inner pipe (3) is driven further into the unconsolidated sediments (51) until it stops against a preferably impenetrable structure (53), the inner pipe (3) moving axially away from the upper portion (21) of the outer pipe (5).
- the assembled telescopic conductor casing (1) is driven into the unconsolidated sediments (51) until the upper portion (21) of the outer pipe (5) assumes a prescribed height above the surface of the unconsolidated sediments (51);
- the outer pipe (5) is released from the inner pipe (3);
- the inner pipe (3) is driven further into the unconsolidated sediments (51) until it stops against a preferably impenetrable structure (53), the inner pipe (3) moving axially away from the upper portion (21) of the outer pipe (5).
11. A method in accordance with Claim 10, characterized in that one or more stabilizers (71) are mounted on the outer pipe (5) prior to driving this into the unconsolidated sediments (51).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20041495A NO320467B1 (en) | 2004-04-13 | 2004-04-13 | Telescopic conductor for a well installation and method for driving the same underground. |
| NO20041495 | 2004-04-13 | ||
| PCT/NO2005/000120 WO2005100732A1 (en) | 2004-04-13 | 2005-04-13 | A telescopic conductor casing for a well installation and a method of driving same into the underground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2562891A1 true CA2562891A1 (en) | 2005-10-27 |
Family
ID=34859256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002562891A Abandoned CA2562891A1 (en) | 2004-04-13 | 2005-04-13 | A telescopic conductor casing for a well installation and a method of driving same into the underground |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20080257603A1 (en) |
| EP (1) | EP1740793B1 (en) |
| AT (1) | ATE377129T1 (en) |
| BR (1) | BRPI0509802B1 (en) |
| CA (1) | CA2562891A1 (en) |
| DE (1) | DE602005003118D1 (en) |
| NO (1) | NO320467B1 (en) |
| WO (1) | WO2005100732A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454368A (en) * | 2010-11-02 | 2012-05-16 | 李征 | Telescopic drill rod and cast-in-situ cylindrical pile rotary drilling machine with same |
| JP6977934B2 (en) * | 2017-09-05 | 2021-12-08 | 株式会社ダイカ | Pipe driving method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1048470A (en) * | 1911-04-25 | 1912-12-24 | Edgard Frankignoul | Tubing for boring. |
| US1210160A (en) * | 1914-12-02 | 1916-12-26 | Edgard Frankignoul | Tubing for boring. |
| US1342424A (en) * | 1918-09-06 | 1920-06-08 | Shepard M Cotten | Method and apparatus for constructing concrete piles |
| US1906706A (en) * | 1931-05-06 | 1933-05-02 | Thomas F Moore | Hole punching device |
| US2846016A (en) * | 1954-03-19 | 1958-08-05 | Huntsinger Associates | Stop collar for well casing |
| US4368785A (en) * | 1980-07-31 | 1983-01-18 | Gondek John T | Well point and method of driving same |
| DE3908646A1 (en) * | 1989-03-16 | 1990-09-20 | Klemm Bohrtechnik Gmbh G | Drill stem |
| DE4224831A1 (en) * | 1992-07-28 | 1994-02-03 | Beb Erdgas & Erdoel Gmbh | Method and device for the underground introduction of transport pipes of greater length into the ground |
| US5540294A (en) * | 1995-02-14 | 1996-07-30 | Anderberg Construction Company | Vertical percussion ground boring tool apparatus and method |
| BR9915699A (en) * | 1998-11-25 | 2001-08-14 | Exxonmobil Upstream Res Co | Process for installing a tubular member axially through at least one overpressurized region of the soil |
| US6857487B2 (en) * | 2002-12-30 | 2005-02-22 | Weatherford/Lamb, Inc. | Drilling with concentric strings of casing |
| NO316183B1 (en) * | 2002-03-08 | 2003-12-22 | Sigbjoern Sangesland | Method and apparatus for feeding tubes |
-
2004
- 2004-04-13 NO NO20041495A patent/NO320467B1/en unknown
-
2005
- 2005-04-13 CA CA002562891A patent/CA2562891A1/en not_active Abandoned
- 2005-04-13 EP EP05734779A patent/EP1740793B1/en active Active
- 2005-04-13 DE DE602005003118T patent/DE602005003118D1/en active Active
- 2005-04-13 US US11/578,535 patent/US20080257603A1/en not_active Abandoned
- 2005-04-13 BR BRPI0509802A patent/BRPI0509802B1/en active IP Right Grant
- 2005-04-13 AT AT05734779T patent/ATE377129T1/en not_active IP Right Cessation
- 2005-04-13 WO PCT/NO2005/000120 patent/WO2005100732A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| EP1740793A1 (en) | 2007-01-10 |
| NO20041495L (en) | 2005-10-14 |
| EP1740793B1 (en) | 2007-10-31 |
| DE602005003118D1 (en) | 2007-12-13 |
| BRPI0509802B1 (en) | 2016-03-08 |
| NO20041495D0 (en) | 2004-04-13 |
| WO2005100732A1 (en) | 2005-10-27 |
| US20080257603A1 (en) | 2008-10-23 |
| NO320467B1 (en) | 2005-12-12 |
| BRPI0509802A (en) | 2007-09-18 |
| ATE377129T1 (en) | 2007-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20140325 |