US20150007463A1 - Method and apparatus for underwater pile excavating - Google Patents
Method and apparatus for underwater pile excavating Download PDFInfo
- Publication number
- US20150007463A1 US20150007463A1 US14/325,749 US201414325749A US2015007463A1 US 20150007463 A1 US20150007463 A1 US 20150007463A1 US 201414325749 A US201414325749 A US 201414325749A US 2015007463 A1 US2015007463 A1 US 2015007463A1
- Authority
- US
- United States
- Prior art keywords
- solid materials
- excavation apparatus
- pump
- cutting blade
- internal chamber
- 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
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Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/006—Dredgers or soil-shifting machines for special purposes adapted for working ground under water not otherwise provided for
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8858—Submerged units
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
- E02F3/9268—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements
- E02F3/9281—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements with axis of rotation in horizontal and transverse direction of the suction pipe
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
An encapsulated underwater excavation assembly for removing solid materials (such as mud, soil, vegetation or debris) from a water bottom including, without limitation, during pile driving or installation operations. The excavation assembly can be contained within a housing that beneficially fits within an inner bore of a piling or other tubular member. A rotary motor having a cutting blade mechanically cuts solid materials while a centrifugal pump moves cuttings away from the lower portion of the excavation assembly for facilitate efficient installation of a piling.
Description
- Priority of united states provisional patent application Ser. No. 61/843,552, filed Jul. 8, 2013, incorporated herein by reference, is hereby claimed.
- None
- 1. Field of the Invention
- The present invention pertains to a method and apparatus for removing solid material, typically from an internal bore of a piling or other tubular member. More particularly, the present invention pertains to an excavating assembly employed to excavate and remove solid matter (including, without limitation, earth) from a piling below the surface of a body of water.
- 2.Brief Description of the Prior Art
- It is frequently beneficial to excavate the bed of a body of water by mechanically removing mud, vegetation, rubbish and/or other debris using a dredge assembly. Although the applications for dredging are too numerous to list, dredging is frequently employed in connection with the offshore oil and gas industry and/or operations in support thereof. Frequently, such dredging or other excavation activities are performed in or around pilings that are driven or otherwise inserted into such a bed or water bottom.
- In many instances, it is beneficial to excavate or otherwise remove mud, vegetation, rubbish and/or debris from an internal bore of a piling or section of pipe to assist with a pile driving or other installation process. Removal of such material generally permits a piling to be installed deeper and/or more efficiently than conventional pile driving operations. However, the space within an internal bore of a piling is typically severely restricted, which significantly limits the ability of conventional dredging/excavating systems to remove such material from such space.
- Thus, there is a need for an effective excavating tool that can efficiently remove earth, mud, debris and other materials from an underwater environment including, without limitation, from an internal bore of a pile being driven or otherwise installed in a bed of a body of water. Such dredging tool should be capable of working within relatively confined spaces and should be more effective than conventional excavating tools.
- The method and apparatus of the present invention can excavate or remove mud, vegetation, debris or other material from the bed of a body of water including, without limitation, from the interior of a pile, construction pipe or other tubular member that is driven, hammered or otherwise inserted into such a bed.
- In a preferred embodiment, the pile excavating assembly of the present invention comprises an external housing containing a radial piston motor, which drives a cutter blade disposed at or near the bottom or distal end of said housing. Said housing also contains an axial piston motor, which drives a centrifugal pump used to pump cuttings and other solid materials through an outlet or discharge port disposed at or near the upper or proximate end of said housing.
- The pile excavating assembly of the present invention further comprises a fluid control system. Said fluid control system, typically a hydraulic power system, can be driven either by a diesel or electric prime mover that operates a hydraulic fluid pump. In a preferred embodiment, said hydraulic fluid pump is located at or near the surface of the water. A plurality of hoses or other conduits, typically connected to a reel or spool, extend from said pump to said pile excavating assembly. Said pile excavating assembly is typically lowered to a submerged or partially submerged pile, pipe or other tubular that is being installed into the bed of a body of water.
- Control fluid (typically hydraulic oil) is directed to and powers said at least two motors that are mounted within the housing of said cutting assembly. Said cutting assembly can be lowered into a pipe, piling or other tubular member using a crane or other lifting means.
- The foregoing summary, as well as any detailed description of the preferred embodiments, is better understood when read in conjunction with the drawings and figures contained herein. For the purpose of illustrating the invention, the drawings and figures show certain preferred embodiments. It is understood, however, that the invention is not limited to the specific methods and devices disclosed in such drawings or figures.
-
FIG. 1 depicts a side view of a pile excavating assembly of the present invention during excavating operations. -
FIG. 2 depicts a partial cut away side view of a pile excavating assembly of the present invention disposed within a pile. -
FIG. 3 depicts a side sectional view of a pile excavating assembly of the present invention. -
FIG. 4 depicts a hydraulic control circuit of the present invention. -
FIG. 1 depicts a side view of pile installation operations using a pile excavating assembly of the present invention. As depicted inFIG. 1 ,floating vessel 10 is deployed atsurface 20 of a body of water such as, for example, a lake, ocean or gulf. Substantiallytubular pile 200 havingupper end 201 and a central through bore is oriented substantially vertically, and is depicted being installed intowater bottom 40. During such installation operations,pile 200 must penetrate mud, soil, rock or other material comprisingwater bottom 40. - It is to be observed that
pile 200 can be driven or hammered intowater bottom 40 using pile installation technology (such as hammers or the like) well known to those having skill in the art, but which are not depicted inFIG. 1 . Further, as depicted inFIG. 1 ,upper end 201 ofpile 200 is positioned belowwater surface 20; however, it is to be observed that saidupper end 201 ofpile 200 can also extend abovewater surface 20 without departing from the scope of the present invention. - A pile excavating assembly of the present invention is suspended from a
lifting apparatus 30 havingboom 31, and is disposed within an inner bore ofpile 200 and is therefore obscured from view inFIG. 1 . As depicted inFIG. 1 , saidlifting apparatus 30 comprises a crane deployed onvessel 10, although a lifting apparatus other than a crane can be used without departing from the scope of the present invention. Saidlifting assembly 30 supports an excavating assembly which is disposed within the inner bore ofpile 200 usingsupport cables 107.Flexible conduit casing 130, containing at least one control fluid conduit, extends fromvessel 10 to said excavating assembly disposed within the inner bore ofpile 200. -
FIG. 2 depicts a partial cut away side view ofpile excavating assembly 100 of the present invention suspended within a central bore oftubular pile 200.Pile excavating assembly 100 of the present invention comprises anexternal housing 101 having an upper orproximate end 102, as well as a lower ordistal end 103. Althoughexternal housing 101 can have other shapes or configurations, in a preferred embodiment saidhousing 101 is substantially cylindrical in shape, defines an internal chamber, and has an outer diameter that is less than the inner diameter of an inner bore ofpile 200. - As depicted in
FIG. 2 , a plurality of lifting pad-eye members 106 are attached tohousing 101, and provide attachment points forcables 107 used to raise and lowerexcavating assembly 100 within the inner bore oftubular pile 200. Although not depicted inFIG. 2 , it is to be observed that saidcables 107 can extend to a lifting apparatus deployed at the water surface, such aslifting apparatus 30 disposed onvessel 10 shown inFIG. 1 . - Said
housing 101 further at least partially containscutting blade 104; in a preferred embodiment, saidcutting blade 104 partially protrudes or extends outward fromlower end 103 ofhousing 101. Saidcutting blade 104 includesabrasive teeth 105 disposed on at least one outer surface of saidcutting blade 104. It is to be observed that the precise design of saidteeth 105 on saidcutting blade 104 can be modified to meet anticipated operational conditions or characteristics. By way of illustration, but not limitation, the placement, shape, geometry and/or configuration of saidteeth 105 can be adjusted depending upon the soil characteristics of a water bottom to be excavated. Optionalprotective conduit casing 130, containing individual control fluid hoses or conduits, extends from saidexcavating assembly 100, which is disposed within the inner bore ofpile 200, to a vessel 10 (not depicted inFIG. 2 ). -
FIG. 3 depicts a side sectional view ofpile excavating assembly 100 of the present invention. Saidpile excavating assembly 100 of the present invention comprises anexternal housing 101 containingcutting motor 110. In a preferred embodiment, saidcutting motor 110 comprises a radial piston motor having a drive shaft 111 oriented substantially perpendicular to the longitudinal axis of saidexcavating assembly 100. In most applications, said drive shaft 111 is oriented substantially horizontally, becauseexcavating assembly 100 is oriented substantially vertically within a substantiallyvertical pile 200. -
Cutting blade 104 having a plurality ofcutting teeth 105 is disposed on said drive shaft 111. When cuttingmotor 110 is actuated, drive shaft 111 rotates, thereby causingcutting blade 104 to rotate about an axis passing through said drive shaft 111. In a preferred embodiment, saidcutting blade 104 is beneficially positioned so that a portion of saidcutting blade 104 protrudes or extends outward fromlower end 103 ofhousing 101. -
Pump motor 120 is mounted withinhousing 101; in a preferred embodiment, saidpump motor 120 comprises an axial piston motor. Saidpump motor 120 powerscentrifugal pump 121 havingpump inlet 122 and pumpdischarge port 123.Pump 121 is used to propel cuttings, solid materials and fluids including, without limitation, solid cuttings or soil broken loose by cuttingblade 104. Such materials enterpump 120 throughpump inlet 122, andexit pump 120 throughdischarge port 123, which can be beneficially positioned at or near theupper end 102 ofhousing 101. - The excavating assembly of the present invention further comprises a fluid-powered control system. Referring back to
FIG. 1 , in a preferred embodiment, said fluid control system comprises a hydraulic power system driven either by a prime mover 131 (typically either diesel or electrically powered engine) that powers ahydraulic fluid pump 132. Saidprime mover 131 and hydraulicfluid pump 132 are located at or nearwater surface 20, typically onvessel 10. A plurality of hoses or other conduits, typically connected to a reel or spool positioned near saidpump 132 and contained within a protectiveouter casing 130, extend from saidpump 132 to an excavating assembly (such as excavatingassembly 100 depicted inFIG. 3 ) disposed withinpile 200. - Referring to
FIG. 3 , control fluid (typically hydraulic oil) is directed to andpowers motors external housing 101 of said excavatingassembly 100. Said control fluid flows to and from said motors via separate hydraulic control lines orhoses 133 which, in turn, can be enclosed withinprotective conduit casing 130. - As noted above, control fluid (typically hydraulic oil) is directed to at least two hydraulic motors disposed within
external housing 101 of excavatingassembly 100 of the present invention. Said excavatingassembly 100 can be lowered into the inner bore of a tubular pile member (such aspile 200 depicted inFIG. 1 ). A firsthydraulic motor 110 with acutting blade 104 loosens soil, mud or other debris that is encountered within said inner bore of said pile. A secondhydraulic motor 120 operates acentrifugal pump 121 that discharges cuttings (and associated liquids) throughdischarge port 123. It is to be observed that a hose or other conduit can be used to connect to saiddischarge port 123 to facilitate pumping such excavated material out of the central bore ofpile 200 throughupper end 201. -
FIG. 4 depicts a representativehydraulic control circuit 140 of the present invention. As depicted inFIG. 1 , hydraulic control fluid is pumped viapump 132 driven by a diesel/hydraulic or electrical power source (prime mover) 131 producing a sufficient flow of hydraulic fluid throughvarious control lines 133. Referring toFIG. 4 , said hydraulic fluid flow can be provided throughsupply line 145 and beneficially divided at or near the excavation assembly usingflow control valves 141, with a portion of such flow (typically half) directed to axial piston pump motor 120 (that operates a centrifugal pump), and the other portion of such flow (again, typically half) being directed to radial piston motor 110 (that drives a cutter head). - In a preferred embodiment,
hydraulic circuit 140 includesrelief valve 142 that is plumbed acrossinput line 143 to returnline 144. Saidrelief valve 142 provides added safety in the event that cuttingblade 104 attached to radial piston motor 110 (depicted inFIG. 3 ) becomes stuck or encounters a stall from wedging against a foreign object. In such an event, hydraulic fluid flow is diverted aroundhydraulic motor 110 and is plumbed back throughreturn line 144 connected to a hydraulic fluid reservoir at or near surface pump 132 (depicted inFIG. 1 ). - In operation, excavating
assembly 100 can be suspended from a crane or other lifting apparatus and inserted within the internal bore of a pile, construction pipe or other tubular member that is driven, hammered or otherwise installed into a water bottom. Said excavating assembly is lowered within said bore until it makes contact with said water bottom. Hydraulic control fluid powers a rotating cutting blade which cuts or digs into said water bottom in order to excavate or loosen mud, vegetation, debris or other material from said water bottom. Such loosened material is directed to a pump in said excavating assembly and pumped out of the internal bore of said pile, thereby allowing said pile to penetrate into said water bottom deeper and more efficiently than conventional installation means. Said excavating assembly can be raised or lowered within said bore as needed. - The above-described invention has a number of particular features that should preferably be employed in combination, although each is useful separately without departure from the scope of the invention. While the preferred embodiment of the present invention is shown and described herein, it will be understood that the invention may be embodied otherwise than herein specifically illustrated or described, and that certain changes in form and arrangement of parts and the specific manner of practicing the invention may be made within the underlying idea or principles of the invention.
Claims (15)
1. An excavation apparatus for excavating solid materials from an inner bore of a piling comprising:
a) a drive motor;
b) a cutting blade connected to said drive motor adapted to contact said solid materials; and
c) a pump for pumping said solid materials away from said excavation apparatus.
2. The excavation apparatus of claim 1 , further comprising a hydraulic control system.
3. The excavation apparatus of claim 1 , further comprising an outer housing defining an internal chamber.
4. The excavation apparatus of claim 3 , wherein said drive motor and pump are disposed in said internal chamber of said housing.
5. The excavation apparatus of claim 4 , wherein said cutting blade is partially disposed within said internal chamber of said housing, and a portion of said blade protrudes from said housing.
6. The excavation apparatus of claim 1 , wherein said excavation apparatus can be selectively raised or lowered within said inner bore of said pile.
7. An excavation apparatus for excavating solid materials from an inner bore of a piling comprising:
a) an outer housing defining an internal chamber;
b) a drive motor disposed within said internal chamber;
c) a pump motor disposed within said internal chamber;
d) a pump for pumping said solid materials away from said excavation apparatus; and
e) a cutting blade connected to said drive motor, wherein said cutting blade is adapted to contact said solid materials.
8. The excavation apparatus of claim 7 , further comprising a hydraulic control system for powering said drive motor and pump motor.
9. The excavation apparatus of claim 7 , wherein said cutting blade is partially disposed within said internal chamber of said housing, and a portion of said blade protrudes from said housing.
10. A method for removing solid materials from an inner bore of a piling comprising:
a) lowering an excavation apparatus within said bore until said excavation assembly contacts said solid materials;
b) excavating said solid materials from said inner bore; and
c) pumping said excavated solid materials from said inner bore.
11. The method of claim 10 , wherein said excavation apparatus comprises:
a) an outer housing defining an internal chamber;
b) a drive motor disposed within said internal chamber;
c) a pump motor disposed within said internal chamber;
d) a pump for pumping said solid materials away from said excavation apparatus; and
e) a cutting blade connected to said drive motor, wherein said cutting blade is adapted to contact said solid materials.
12. The method of claim 11 , wherein said excavation apparatus further comprises a hydraulic control system for powering said drive motor and pump motor.
13. The method of claim 12 , wherein said cutting blade is partially disposed within said internal chamber of said housing, and a portion of said blade protrudes from said housing.
14. The method of claim 10 , wherein said excavation apparatus is suspended from a lifting apparatus deployed on a floating vessel.
15. The method of claim 10 , wherein said lifting apparatus comprises a crane.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/325,749 US20150007463A1 (en) | 2013-07-08 | 2014-07-08 | Method and apparatus for underwater pile excavating |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US201361843552P | 2013-07-08 | 2013-07-08 | |
US14/325,749 US20150007463A1 (en) | 2013-07-08 | 2014-07-08 | Method and apparatus for underwater pile excavating |
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US20150007463A1 true US20150007463A1 (en) | 2015-01-08 |
Family
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Family Applications (1)
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US14/325,749 Abandoned US20150007463A1 (en) | 2013-07-08 | 2014-07-08 | Method and apparatus for underwater pile excavating |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015108987A1 (en) * | 2014-01-14 | 2015-07-23 | Conocophillips Company | Method of forming a mudline cellar for offshore arctic drilling |
CN106087856A (en) * | 2016-07-22 | 2016-11-09 | 河南省基本建设科学实验研究院有限公司 | A kind of the Yellow River comprehensive control pier |
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Publication number | Priority date | Publication date | Assignee | Title |
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US5360292A (en) * | 1993-07-08 | 1994-11-01 | Flow International Corporation | Method and apparatus for removing mud from around and inside of casings |
US5447200A (en) * | 1994-05-18 | 1995-09-05 | Dedora; Garth | Method and apparatus for downhole sand clean-out operations in the petroleum industry |
US20030102165A1 (en) * | 2001-12-03 | 2003-06-05 | Frantz Anthony F. | System and apparatus for excavating contaminated pilings |
US20070189859A1 (en) * | 2006-02-13 | 2007-08-16 | Gunther Johan M | In-situ pilings with consistent properties from top to bottom and minimal voids |
US20090173501A1 (en) * | 2006-05-03 | 2009-07-09 | Spyro Kotsonis | Borehole Cleaning Using Downhole Pumps |
US20100186960A1 (en) * | 2009-01-29 | 2010-07-29 | Reitsma Donald G | Wellbore annular pressure control system and method using accumulator to maintain back pressure in annulus |
US7975765B2 (en) * | 2007-09-20 | 2011-07-12 | Logan Completion Systems Inc. | Enclosed circulation tool for a well |
US20110209879A1 (en) * | 2009-12-15 | 2011-09-01 | Quigley Peter A | System and Methods for Removing Fluids from a Subterranean Well |
US20120279702A1 (en) * | 2009-10-05 | 2012-11-08 | Sylvain Bedouet | Formation Testing |
US20130341033A1 (en) * | 2012-06-25 | 2013-12-26 | Zeitecs B.V. | Diffuser for cable suspended dewatering pumping system |
US20140096957A1 (en) * | 2010-07-23 | 2014-04-10 | Haliburton Energy Services, Inc. | Fluid control in reservoir fluid samplilng tools |
US20140131037A1 (en) * | 2012-11-14 | 2014-05-15 | Schlumberger Technology Corporation | Method and Apparatus for Determining Efficiency of a Sampling Tool |
-
2014
- 2014-07-08 US US14/325,749 patent/US20150007463A1/en not_active Abandoned
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5360292A (en) * | 1993-07-08 | 1994-11-01 | Flow International Corporation | Method and apparatus for removing mud from around and inside of casings |
US5447200A (en) * | 1994-05-18 | 1995-09-05 | Dedora; Garth | Method and apparatus for downhole sand clean-out operations in the petroleum industry |
US20030102165A1 (en) * | 2001-12-03 | 2003-06-05 | Frantz Anthony F. | System and apparatus for excavating contaminated pilings |
US6672408B2 (en) * | 2001-12-03 | 2004-01-06 | Anthony F. Frantz | System and apparatus for excavating contaminated pilings |
US20070189859A1 (en) * | 2006-02-13 | 2007-08-16 | Gunther Johan M | In-situ pilings with consistent properties from top to bottom and minimal voids |
US20090173501A1 (en) * | 2006-05-03 | 2009-07-09 | Spyro Kotsonis | Borehole Cleaning Using Downhole Pumps |
US7905291B2 (en) * | 2006-05-03 | 2011-03-15 | Schlumberger Technology Corporation | Borehole cleaning using downhole pumps |
US7975765B2 (en) * | 2007-09-20 | 2011-07-12 | Logan Completion Systems Inc. | Enclosed circulation tool for a well |
US20100186960A1 (en) * | 2009-01-29 | 2010-07-29 | Reitsma Donald G | Wellbore annular pressure control system and method using accumulator to maintain back pressure in annulus |
US20120279702A1 (en) * | 2009-10-05 | 2012-11-08 | Sylvain Bedouet | Formation Testing |
US20110209879A1 (en) * | 2009-12-15 | 2011-09-01 | Quigley Peter A | System and Methods for Removing Fluids from a Subterranean Well |
US20140096957A1 (en) * | 2010-07-23 | 2014-04-10 | Haliburton Energy Services, Inc. | Fluid control in reservoir fluid samplilng tools |
US20130341033A1 (en) * | 2012-06-25 | 2013-12-26 | Zeitecs B.V. | Diffuser for cable suspended dewatering pumping system |
US20140131037A1 (en) * | 2012-11-14 | 2014-05-15 | Schlumberger Technology Corporation | Method and Apparatus for Determining Efficiency of a Sampling Tool |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015108987A1 (en) * | 2014-01-14 | 2015-07-23 | Conocophillips Company | Method of forming a mudline cellar for offshore arctic drilling |
US10267009B2 (en) | 2014-01-14 | 2019-04-23 | Conocophillips Company | Method of forming a mudline cellar for offshore arctic drilling |
CN106087856A (en) * | 2016-07-22 | 2016-11-09 | 河南省基本建设科学实验研究院有限公司 | A kind of the Yellow River comprehensive control pier |
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AS | Assignment |
Owner name: TUSK SUBSEA SERVICES, LLC, LOUISIANA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SOUTHERLAND, HUNTER;SPISAK, TIM;REEL/FRAME:033432/0387 Effective date: 20140730 |
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STCB | Information on status: application discontinuation |
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