EP3322966A1 - Downhole stinger geotechnical sampling and in situ testing tool - Google Patents
Downhole stinger geotechnical sampling and in situ testing toolInfo
- Publication number
- EP3322966A1 EP3322966A1 EP16825238.5A EP16825238A EP3322966A1 EP 3322966 A1 EP3322966 A1 EP 3322966A1 EP 16825238 A EP16825238 A EP 16825238A EP 3322966 A1 EP3322966 A1 EP 3322966A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carrier tube
- hydraulic piston
- offshore system
- soil
- inner diameter
- 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
- 238000012360 testing method Methods 0.000 title claims description 9
- 238000011065 in-situ storage Methods 0.000 title claims description 7
- 238000005070 sampling Methods 0.000 title description 2
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims description 50
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 230000001133 acceleration Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims 2
- 238000013022 venting Methods 0.000 claims 2
- 230000003068 static effect Effects 0.000 description 11
- 239000000523 sample Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- -1 cone penetrometer) Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/04—Sampling of soil
-
- 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
-
- 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
- E21B47/04—Measuring depth or liquid level
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/001—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells specially adapted for underwater installations
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/003—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by analysing drilling variables or conditions
-
- 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
- E21B7/12—Underwater drilling
Definitions
- the present invention generally relates to offshore geotechnicai tools. More specifically, the present invention provides a system for bailistically inserting a geotechnicai tool into a seafloor,
- the cone penetrometer is an in situ testing tool that can be used to perform cone penetrometer test ("CPT") to gather geotechnicai engineering properties of seafloor.
- CPT cone penetrometer test
- a large deployment system is needed to deliver the cone penetrometer to the seafloor.
- the cone penetrometer gathers data as its cone shaped tip is pushed into the soil at a near static or static rate of speed.
- the standard push velocity is ⁇ 2 cm/sec (+ 25%) according to industry accepted American Society for Testing and Material (ASTM) protocol.
- Readings are taken continuously every 1 cm to 5 cm or so to obtain continuously sampled static data.
- the length of the cone rod determines depth of push and varies typically from about 1.5 m to 4.5 m depending upon which system or specific tool is employed.
- static CPT requires large and expensive equipment that can provide a stable platform at the seabed. Utilized from the stable platform, the cone penetrometer can then be inserted with a steady pressure at a controlled rate.
- a cone penetrometer can be operated in conjunction with wire-line drilling techniques with equipment mounted on a large drill vessel. Since the cone penetrometer is pushed at a constant rate, any drill string that secures the cone penetrometer to the vessel must remain immobilized so that the tool is essentially unaffected by vessel motion during the push. Immobilization of the drill string can be accomplished using a weighted seabed frame (SBF) that is designed to allow the drill string to be attached to the heavy weighted seabed frame (e.g., -20,000 lbs).
- SBF weighted seabed frame
- the SBF is normally lowered to the seabed prior to spudding a borehole from a large winch on the deck of the vessel.
- the SBF is lowered through a large center well through the vessel.
- the drill rig is usually positioned over the large center well.
- Drilling heave compensators are used for both the drillstring and SBF to reduce influence of sea waves.
- hydraulic rams on the SBF are activated and clamp onto the drill string. Once the clamps grip the drill pipe firmly, weight of the SBF is added onto the drill string and allows the drill pipe to be essentially motionless (since it is now tied to the seafloor).
- the added weight of the SBF on the drill pipe provides the heave compensators with enough resistance to allow the drill string and SBF to remain motionless during the insertion of the cone penetrometer into the seabed.
- a recently developed offshore cone penetrometer tool is "allowed to free fail" into the seafloor to gather both static and dynamic CPT data.
- static CPT data refers to CPT data collected when a cone penetrator is pushed at a static rate (typically at ⁇ 2 cm/s).
- dynamic CPT data refers to collection of CPT data at a non-static rate (much faster than 2 cm/s).
- the cone sensor portion is installed using a large piston corer weight-head and allowed to free-fall and penetrate into the sediment to about 20 m. During this time, dynamic CPT data is gathered. Once the offshore cone penetrometer tool is embedded, the cone tip can be pushed down to about 40 m at a static push rate (-2 cm/s).
- the offshore cone penetrometer tool is designed to quickly assess soil properties by converting the dynamic CPT data to static CPT data using velocity algorithms.
- One of the main drawbacks of the offshore cone penetrometer tool is that the tool requires the use of a large seabed frame and heave compensator system.
- One primary limitation of the Stinger CPT tool is that it cannot measure CPT data beyond -40 m (-20 m of dynamic data and -20 m of static data).
- an offshore system for in situ testing of soil includes: a) a carrier tube comprising an upper end and a lower end, wherein the carrier tube is characteri zed by an outer diameter and an inner diameter and wherein the inner diameter of the carrier tube defines a hydraulic cylinder; b) a landing sub shaped or installed at or near the upper end of the carrier tube, wherein inner diameter of the landing sub is smaller than the inner diameter of the carrier tube; c) a drill bit shaped or installed at or near the lower end of the carrier tube; d) a series of extension tubes extending upward from the upper end of the carrier tube, e) an upward seal that seals top portion of the extension tubes; f) a compression system for introducing compressed fluid under the upward seal; g) a fixed rod that runs through the hydraulic cylinder; h) a hydraulic piston disposed in the hydraulic cylinder, wherein the hydraulic piston is moveable along the fixed rod; i) one or more shear pins configured to restrict displacement of the hydraulic piston until a sufficient fluid
- an offshore system for collecting high quality soil samples comprising: a) a carrier tube comprising an upper end and a lower end, wherein the carrier tube is characterized by an outer diameter and an inner diameter, wherein the inner diameter of the carrier tube defines a hydraulic cylinder; b) a landing sub shaped or instal led at or near the upper end of the carrier tube, wherein inner diameter of the landing sub is smaller than the inner diameter of the carrier tube; c) a drill bit shaped or instal led at or near the lower end of the carrier tube; d) a series of extension tubes extending upward from the upper end of the carrier tube; e) an upward seal that seal s top portion of the extension tubes; t) a compression system for introducing compressed fluid under the upward seal; g) a fixed rod that runs through the hydraulic cylinder, h) a hydraulic piston disposed in the hydraulic cylinder, wherein the hydraulic piston is moveable along the fixed rod; i) one or more shear pins configured to restrict displacement of the hydraulic piston until
- FIGS. 1A-1.B illustrates a dynamic delivery system with cone penetrometer before
- FIGS. 2A-2B illustrates a dynamic delivery system with soil sampler before (FIG.
- the present invention provides offshore dynamic delivery systems and methods for deploying geotechmcal tools in an offshore environment.
- Certain testing tools take measurements (e.g., tip resistance, sleeve resistance, pore pressure, friction, etc.) in situ while soil samplers (e.g., piston sampler) collect soil samples that are analyzed above water.
- the geotechnical tools can be in situ testing probe (e.g., cone penetrometer), soil sampler, or any- other compatible tool that can be inserted into seafloor.
- the dynamic delivery system includes mechanisms that allow the geotechnical tool to be ballistically inserted into the soil during a stroke action. As such, the offshore dynamic delivery system allow soil samples or geotechnical data to be collected very rapidly at greater depths without compromising quality of sample or data.
- the dynamic delivery system also allows in situ testing or sampling of soil without the need for a large drill vessel equipped with a heave compensator, center well, or SBF.
- the collected CPT data can include, for example, pore pressure data with depth prior to conductor/casing installation, accurate heat flow measurements for hydrate assessment, cost effective data for accurate foundation concept evaluation, as well as geotechnical data for temperature profile measurements, soil shear strength, and the like.
- Other advantages of the present invention include, but are not limited to, the following:
- ® Dynamic CPT data is collected from within a borehole deployed tool without using a reaction mass (e.g., sea bed frame) to immobilize the drill string
- Any drilling fluid introduced into the drill string can be used to build up fluid pressure
- FIGS. 1A-1B illustrate the dynamic delivery system of the present invention featuring a cone penetrometer 10 before (FIG. 1 A) and after stroke (FIG. IB) action of its hydraulic piston 6.
- the dynamic delivery system includes a carrier tube 1 that serves to house some key elements of the dynamic deliver ⁇ ' system. These elements include a fixed rod 7 that runs along the axial length of the carrier tube 1 and an inner tube 4 that is concentric to the carrier tube 1 and disposed between the carrier tube 1 and the fixed rod 7.
- the cone penetrometer 10 is outfitted at the bottom portion of the inner tube 4.
- the drill head 11 is installed at the bottom portion of the carrier tube 1.
- the hydraulic piston 6 and inner tube 4 rests inside a hydraulic cylinder 5 that is defined by the inner diameter of the carrier tube 1.
- the hydraulic piston 6 sits above the inner tube 4 and the two are moveable in unison (upward or downward) along the fixed rod 7.
- the fixed rod 7 may include anti-spiral grooves that prevents rotational movement of the cone penetrometer 10.
- Vertical movement of the hydraulic piston 6 is restricted by shear pins 8 which locks the hydraulic piston in place before the stroke. As shown, the shear pins 8 are installed into the slots for the shear pins.
- Shear pin bushings 13 are installed on either side of the piston to help ensure repeatable shoot off pressures.
- the top portion of the carrier tube 1 is connected to an extension tube 2
- An upward seal 3 covers the extension tube 2 with an opening in the seal that allows fluids to be introduced into the system.
- fluids can be introduced into the system (bolded arrow indicates direction of fluid) via a compression device (e.g., a pump) that compresses fluids under the upward seal 3.
- the compressed fluid can build up pressure inside the system that leads to the eventual failure of the shear pins 8 and ballistic firing of the hydraulic piston 6.
- the piston is instantaneously accelerated and forces the cone penetrometer 11 into the soil at the bottom of the borehole.
- the velocity of the firing is regulated by built up fluid pressure, which can be controlled by number of shear pins and/or material of the shear pins.
- Landing sub 9 can also be fashioned or installed at or near the top portion of the carrier sub 1.
- the landing sub 9 has an inner diameter smaller than the carrier tube 1 and essentially provides shoulders that allows certain housed elements to be seated.
- the dynamic deliver ⁇ ' system is positioned slightly above seafloor and then fired to obtaine a cone penetrometer measurement that starts at the seafloor interface.
- the carrier tube is then advanced into the seafloor by the length of the initial CPT embedment.
- a portion of the carrier tube 1 is drilled/inserted into the soil before stroke takes place.
- the cone penetrometer 10 and at least a portion of the inner tube 4 are ballisticaily inserted deeper into the soil. This ballistic insertion is possible because the drill head 11 has an opening that allows elements housed inside the carrier tube 1 to thrust into the soil in coordination with movement of the hydraulic piston 6 (FIG. IB).
- a speed control device 12 allows fluid under pressure to pass into the hydraulic cylinder 5 at varying flow rate in order to control descent velocity rate of the hydraulic piston 6, Vent sub 15 and snubber 16 prevent damage to the dynamic delivery system if the system is aecident!y fired above the seafloor or without sufficient sediment to retard the driving force before reaching end of the stroke.
- Quick release mechanism 14 allows the system to be easily and repeatedly broken down into at least two main parts for improved handling.
- a cup type or spear type control knob 17 is used to latch onto a wireline overshot to catch and recover the geotechnical tool back to the surface. This process is repeated for each advancement of the CPT.
- the CPT is not controlled in its advancement rate, it does not require a seabed frame to provide reaction for a heave compensator since insertion of the CPT is ⁇ 2 sec. (i.e., less than typical ocean wave length period). Since the CPT is inserted so fast, it is unaffected by vessel heave cause by the sea state at the time of operation.
- FIGS. 2A-2B illustrate a dynamic delivery system featuring a soil sampler 18 in place of the cone penetrometer 11 shown in FIGS. 1A-1B.
- the soil sampler 18 includes a sampler vents 19 and sampler valve 20 designed to help collect a soil sample.
- soil flows through the soil sampler 18 and out of the sampler vents 19.
- the sampler de-accelerates as it advances into the virgin soil.
- the soil sampler 18 can be configured into various lengths.
- the soil sampler is not controlled in its advancement rate, it does not require a seabed frame to provide reaction for a heave compensator since insertion of the sample barrel is ⁇ 2 sec. (i.e., less than typical ocean wave length period). Since the soil sampler is inserted so fast, it is unaffected by vessel heave cause by the sea state at the time of operation.
- the carrier tube 1 may be lowered into the sea from a vessel via connection to a series of extension tubes (i.e., drillstring).
- the housed elements are lowered into the carrier portion (carrier tube 1) via a wireline or allowed to free fail with the extension tubes resting on a landing shoulder (landing sub 9) within the carrier portion of the tool.
- a compression system 18 e.g., pump
- No external locking arrangement is needed to hold the inner tube in place.
- This sealing allows fluid in the extension tubes to be compressed with the introduction of additional fluid which results in a pressure build up.
- the inner elements are then fired into the formation under this pressure buildup of fluid in the extension tubes.
- the actual firing pressure i.e. force
- the actual firing pressure is dependent the type of material that are used in the selection of the shear pins, A number of firing pressure combinations are available based in the type and strength of shear pins used.
- the inner elements Upon reaching the maximum shear force offered by the available shear pins selected, the inner elements are instantaneously accelerated into the formation where the soil resistance eventually slows the tools advancement rate with a decreasing acceleration until it reaches the lessor of its maximum penetration or a shorter length based on the amount of resistance that the soil achieves with side wall contact from the probe or sample barrel.
- a hydraulic cylinder constitutes part of the carrier tube so that the piston forms a seal directly against the inner wall of the carrier tube. The seal is provided on the outer circumferential portion of the inner tube with the carrier tube which seals the hydraulic
- raw data file generated from the ballistic insertion can be analyzed and processed into acceleration, velocity, and depth measurements using the same electronic memory module that is deployed with the CPT.
- the soil sample collected is identical to industry standard 3" Shelby tubes.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Geophysics (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562193414P | 2015-07-16 | 2015-07-16 | |
PCT/US2016/042449 WO2017011731A1 (en) | 2015-07-16 | 2016-07-15 | Downhole stinger geotechnical sampling and in situ testing tool |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3322966A1 true EP3322966A1 (en) | 2018-05-23 |
EP3322966A4 EP3322966A4 (en) | 2018-07-11 |
EP3322966B1 EP3322966B1 (en) | 2020-07-15 |
Family
ID=61951705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16825238.5A Active EP3322966B1 (en) | 2015-07-16 | 2016-07-15 | Downhole stinger geotechnical sampling and in situ testing tool |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3322966B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114354899B (en) * | 2022-01-28 | 2022-08-26 | 江苏省交通工程建设局 | Soil property testing device for dragline bridge well sinking and using method thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1603725A (en) * | 1968-08-05 | 1971-05-24 | Penetrometer for exploration of under-water strata | |
NL9500049A (en) * | 1995-01-11 | 1996-08-01 | Fugro Eng Bv | Soil testing and sampling system. |
-
2016
- 2016-07-15 EP EP16825238.5A patent/EP3322966B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3322966A4 (en) | 2018-07-11 |
EP3322966B1 (en) | 2020-07-15 |
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