WO2003050383A1 - Procede permettant de liberer une tige de forage coincee - Google Patents

Procede permettant de liberer une tige de forage coincee Download PDF

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Publication number
WO2003050383A1
WO2003050383A1 PCT/US2002/039502 US0239502W WO03050383A1 WO 2003050383 A1 WO2003050383 A1 WO 2003050383A1 US 0239502 W US0239502 W US 0239502W WO 03050383 A1 WO03050383 A1 WO 03050383A1
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WO
WIPO (PCT)
Prior art keywords
pipe
force
freeing
drill pipe
psi
Prior art date
Application number
PCT/US2002/039502
Other languages
English (en)
Inventor
Arthur Herman Hale
Azra Nur Tutuncu
Original Assignee
Shell Internationale Research Maatschappij B.V.
Shell Canada Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij B.V., Shell Canada Limited filed Critical Shell Internationale Research Maatschappij B.V.
Priority to AU2002348211A priority Critical patent/AU2002348211B2/en
Priority to CA2469166A priority patent/CA2469166C/fr
Priority to EP02782409A priority patent/EP1454034B1/fr
Priority to EA200400797A priority patent/EA006033B1/ru
Priority to BR0214858-7A priority patent/BR0214858A/pt
Publication of WO2003050383A1 publication Critical patent/WO2003050383A1/fr

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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
    • E21B31/00—Fishing for or freeing objects in boreholes or wells
    • E21B31/005—Fishing for or freeing objects in boreholes or wells using vibrating or oscillating means

Definitions

  • This invention relates to well servicing and more particularly to a method for the auxiliary use of ultrasonic energy in the case of differential sticking of pipe to reduce the contact area of a filtercake prior to applying freeing force.
  • drilling fluid is circulated through the interior of the drill string and then back up to the surface through the annulus between the drill string and the wall of the borehole.
  • the drilling fluid serves various purposes including lubricating the drill bit and pipe, carrying cuttings from the bottom of the well borehole to the rig surface, and imposing a hydrostatic head on the formation being drilled to prevent the escape of oil, gas, or water into the well borehole during drilling operations.
  • Some warning signs that put one on notice of the possibility of differential sticking are the presence of prognosed low pressure along with depleted sands; long, unstabilized bottom-hole assembly (hereafter BHA) sections in a deviated hole; loss of fluid loss control and increased sand content; and increasing overpull, slack off or torque to start string movement.
  • Indications of the actual presence of differential sticking include a period of no string movement; the string cannot be rotated or moved, but circulation is unrestricted.
  • Methods of freeing differentially stuck drill string include applying torque and jar down with maximum torque load; using a spot pipe releasing pill if jarring is unsuccessful; and lowering mud weight, which may have implications with respect to hole stability.
  • the overpull required to release the pipe may exceed rig capacity, and even cause collapse of the rig. It would be very beneficial if a method were available to reduce the required freeing force so that the existing rig would be adequate for overpull without possibly causing collapse.
  • U. S. 4,913,234 discloses a system for providing vibrational energy to effect the freeing of a section of well pipe which comprises: a) an orbital oscillator including a housing; b) an elongated screw shaped stator mounted in said housing and an elongated screw shaped rotor mounted for precessionally rolling rotation freely in said stator; c) means for suspending said oscillator for rotation within said drill pipe about the longitudinal axis of the drill pipe in close proximity to the stuck portion thereof; and d) drive means for rotatably driving said rotor to effect orbital lateral sonic vibration of said housing such that said housing precesses laterally around the inner wall of said pipe, thereby generating lateral quadrature vibrational forces in said pipe to effect the freeing thereof from said well bore .
  • U. S .5, 234, 056 discloses a method for freeing a drill string which comprises a) resiliently suspending a mechanical oscillator from a support structure on an elastomeric support having a linear constant spring rate; b) coupling said oscillator to the top end of the drill string, the elastomeric support creating a low impedance condition for vibratory energy at said drill string top end; c) driving said oscillator to generate high level sonic vibratory energy in a longitudinal vibration mode so as to effect high longitudinal vibratory displacement of the top end of the drill string; and d) the drill string acting as an acoustic lever which translates the high vibrational displacement at the top end of the drill string into a high vibrational force at the point where the drill string is stuck in the bore hole, thereby facilitating the freeing of the drill string.
  • the present invention provides a method for reducing the amount of force necessary to free a stuck drill pipe which comprises: a) Lowering an ultrasonic source having preferably at least 20 kHz central frequency down a drill string to the point of contact causing sticking; b) Applying ultrasonic vibrations at the point of contact; c) Reducing contact area; d) Applying reduced freeing force to free pipe.
  • Figure 1 is a diagram of one possible position of a differentially stuck drill pipe.
  • Figure 2 is a schematic diagram of the hollow cylinder filtration cell used in the experimental work.
  • Figure 3 is a graph showing the reduction in pull out
  • Figure 4 is a graph showing the reduction in pull out (freeing) force as a function of sonification time for a Berea sandstone hollow cylinder sample.
  • the present invention describes a method of freeing stuck drill pipe, particularly in the case of differential sticking, by the auxiliary use of ultrasonic energy to reduce the amount of freeing force necessary.
  • Figure 1 is a diagram representing one example of the position of a differentially stuck drill pipe.
  • the drill string, 4, becomes embedded in filter cake, 3, opposite the permeable zone, 2, at high differential mud pressure overbalance, leading to stuck pipe in the contact zone.
  • the filter cake is eroded both by hydraulic flow and by the mechanical action of the drill string.
  • a static filter cake may build up, which increases the overall cake thickness.
  • the string may now become embedded in the thick filter cake, particularly when the wellbore, 1, is at high deviation and/or the BHA is not properly stabilized.
  • the static filter cake seals the wellbore pressure (at overbalance) from the backside of the pipe.
  • An area of low pressure develops behind the backside of the string/BHA and starts to equilibrate to the lower formation pressure.
  • a differential pressure starts to build up across the pipe/BHA. With time the area of pipe sealed in the filter cake increases. The overbalance pressure times the contact area provides a drag force that may prevent the pipe from being pulled free. The build-up of the drag force is very rapid from the start and will increase with time.
  • Typical actions used to free the string include applying torque and jarring down with maximum torque load. Circulation is usually not restricted in the case of differential sticking. Therefore, spotting fluids can be circulated across the zone causing the stuck pipe. Spotting fluids contain additives that can dehydrate and crack filter cakes and additives that can lubricate the drill string. Cracking the filter cake will help to transmit the mud pressure to the backside of the string and remove the differential pressure across the string, resulting in minimization of friction. The sticking force then is reduced by an equivalent amount as shown in Equation 1.
  • Design of the drill string is a major consideration.
  • the strength of drill pipe limits the maximum allowable weight and hence the ability to exert overpull. Even if the drill pipe is designed strong enough, the overpull required to release the pipe may exceed rig capacity. It is possible, particularly with small rigs in land operations, for rigs to collapse due to forces applied exceeding the maximum overpull. Downhole jars also allow high impact force to be exerted at the stuck point with relatively low overpull and setdown. However, sometimes the forces exerted are not enough to release the stuck pipe. Jar itself may become stuck as well. In the present invention decrease of contact area of the stuck pipe reduces the amount of overpull required for application. Since A is reduced, sticking force is also reduced (see Equation 1) .
  • an ultrasonic source is enclosed in a housing of a pipe that permits disposition in the drill string.
  • the ultrasonic source is a high-power sweeping acoustic transducer that operates at either a fixed frequency of approximately 20 KHz, or the frequency can be varied between several Hz and 40 KHz.
  • the tool is made up of a variable number of cylindrical ceramic transducers, which transmit the acoustic energy radially.
  • the transmitter itself is a piece of solid steel to which a piezoelectric driver (s) are attached.
  • the acoustic tool is connected via a normal logging cable to a high power amplifier.
  • the power amplification is related to the ratio of the cross-sectional areas of the tool.
  • FIG. 2 is a schematic drawing of the dynamic hollow cylinder filtration cell used in the experiments. Hollow core tests represent realistic borehole geometry. The cell is designed and built to handle core samples of 4-inch outside diameter (OD) with 8.3-inch length. Variable internal diameters (ID) for hollow cylinder cores can be used in the cell. For this invention, 0.9-inch ID samples were used.
  • a Digital Sonifier 450 Model by Branson Ultrasonics Corp. of Danbury, Connecticut was used for ultrasonic cleaning purposes.
  • the system consists of the power supply unit, the controls, the converter and a horn.
  • a PC was used to interface with the system and to collect the data off the system.
  • the hollow cylinder Berea cores were first damaged using drilling and/or drill-in fluids of different formulations under various differential pressures.
  • the drill-in fluid was used to conduct the static filtration.
  • the filtration was performed in the cell at 600-psi pressure difference for about 12 hours.
  • the cake thickness was varied between 2 to 3 mm.
  • Drilling fluid was circulated into the hollow cylinder core and out from an annulus at 500-psi circulation pressure and 50 cc/min.
  • the pump was stopped and static filtration was initiated at 500 psi long enough to stick a pipe and static filtrate was collected.
  • the ultrasonic horn with 20 KHz central frequency was used to apply sonification from the interior of the pipe that stuck to the wall of the core.
  • the permeability, differential pressure, sonification amplitude, power, and temperature were monitored as a function of sonification treatment time, and the energy requirement for near-complete permeability recovery and pullout force were investigated.
  • the system comprises a stainless steel cell, two movable pistons, and an ultrasonic horn holder. It is capable of handling in excess of 5,000 psi pressure and also can be operated at elevated temperature under a specified differential pressure.
  • Two syringe pumps (manufactured by and commercially available from ISCO, Inc. of Kansas) were used to inject fluid and to control the differential pressure simultaneously with a precision of ⁇ 1 psi to measure the permeability of the sample.
  • a data acquisition system was used to record and monitor the realtime pressure, flow rate, and volume of fluid injected. During sonification, the real-time amplitude, power, and time were also recorded and monitored.
  • FIG. 3 is a graph showing the reduction in pull out (freeing) force as a function of sonification time for an aloxite hollow cylinder sample damaged by drill-in fluid, where the filter cake was built at an elevated pressure and room temperature.
  • the pullout force ratio is the ratio of freeing force after sonification to freeing force before sonification.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Marine Sciences & Fisheries (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

Procédé auxiliaire destiné à la libération d'une tige de forage coincée par la formation d'un gâteau de sédiments, qui permet de réduire la quantité de force nécessaire pour libérer ladite tige. Ledit procédé consiste (a) à faire descendre un dispositif de type émetteur d'ultrasons dans la tige de forage jusqu'au point de contact entre ladite tige et le gâteau de sédiments et (b) à produire une énergie ultrasonore au point de contact jusqu'à ce que la zone de contact soit suffisamment réduite pour entraîner une réduction considérable de la force nécessaire pour libérer la tige.
PCT/US2002/039502 2001-12-11 2002-12-11 Procede permettant de liberer une tige de forage coincee WO2003050383A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2002348211A AU2002348211B2 (en) 2001-12-11 2002-12-11 Method of freeing stuck drill pipe
CA2469166A CA2469166C (fr) 2001-12-11 2002-12-11 Procede permettant de liberer une tige de forage coincee
EP02782409A EP1454034B1 (fr) 2001-12-11 2002-12-11 Procede permettant de liberer une tige de forage coincee
EA200400797A EA006033B1 (ru) 2001-12-11 2002-12-11 Способ освобождения прихваченной бурильной трубы
BR0214858-7A BR0214858A (pt) 2001-12-11 2002-12-11 Método de liberar um tubo de perfuração preso

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33952001P 2001-12-11 2001-12-11
US60/339,520 2001-12-11

Publications (1)

Publication Number Publication Date
WO2003050383A1 true WO2003050383A1 (fr) 2003-06-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/039502 WO2003050383A1 (fr) 2001-12-11 2002-12-11 Procede permettant de liberer une tige de forage coincee

Country Status (7)

Country Link
EP (1) EP1454034B1 (fr)
CN (1) CN1320252C (fr)
BR (1) BR0214858A (fr)
CA (1) CA2469166C (fr)
EA (1) EA006033B1 (fr)
OA (1) OA12742A (fr)
WO (1) WO2003050383A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6845818B2 (en) * 2003-04-29 2005-01-25 Shell Oil Company Method of freeing stuck drill pipe
US11131144B1 (en) 2020-04-02 2021-09-28 Saudi Arabian Oil Company Rotary dynamic system for downhole assemblies
US11306555B2 (en) 2020-04-02 2022-04-19 Saudi Arabian Oil Company Drill pipe with dissolvable layer
US11319777B2 (en) 2020-04-02 2022-05-03 Saudi Arabian Oil Company Extended surface system with helical reamers

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102926683B (zh) * 2012-11-19 2015-06-10 无锡市京锡冶金液压机电有限公司 一种岩凿机防溶洞卡钻模拟实验方法
CN103486331B (zh) * 2013-09-12 2015-07-22 广州市恒盛建设工程有限公司 一种非开挖管道施工中卡管事故的处理方法
CN105626035B (zh) * 2014-11-06 2019-01-01 中国石油化工股份有限公司 用于模拟钻井受阻遇卡的井壁实验装置
CN105842152B (zh) * 2015-01-15 2018-11-16 中国石油天然气股份有限公司 泥饼力学性质测量仪

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384625A (en) * 1980-11-28 1983-05-24 Mobil Oil Corporation Reduction of the frictional coefficient in a borehole by the use of vibration
US4667742A (en) * 1985-03-08 1987-05-26 Bodine Albert G Down hole excitation system for loosening drill pipe stuck in a well
US6009948A (en) * 1996-05-28 2000-01-04 Baker Hughes Incorporated Resonance tools for use in wellbores
WO2001083933A1 (fr) * 2000-05-03 2001-11-08 Cybersonics, Inc. Carottier/dispositif de forage sonores/ultrasonores intelligents

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384625A (en) * 1980-11-28 1983-05-24 Mobil Oil Corporation Reduction of the frictional coefficient in a borehole by the use of vibration
US4667742A (en) * 1985-03-08 1987-05-26 Bodine Albert G Down hole excitation system for loosening drill pipe stuck in a well
US6009948A (en) * 1996-05-28 2000-01-04 Baker Hughes Incorporated Resonance tools for use in wellbores
WO2001083933A1 (fr) * 2000-05-03 2001-11-08 Cybersonics, Inc. Carottier/dispositif de forage sonores/ultrasonores intelligents

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6845818B2 (en) * 2003-04-29 2005-01-25 Shell Oil Company Method of freeing stuck drill pipe
US11131144B1 (en) 2020-04-02 2021-09-28 Saudi Arabian Oil Company Rotary dynamic system for downhole assemblies
US11306555B2 (en) 2020-04-02 2022-04-19 Saudi Arabian Oil Company Drill pipe with dissolvable layer
US11319777B2 (en) 2020-04-02 2022-05-03 Saudi Arabian Oil Company Extended surface system with helical reamers

Also Published As

Publication number Publication date
CA2469166A1 (fr) 2003-06-19
AU2002348211A1 (en) 2003-06-23
CN1602386A (zh) 2005-03-30
CN1320252C (zh) 2007-06-06
EP1454034A1 (fr) 2004-09-08
EA200400797A1 (ru) 2005-06-30
EP1454034B1 (fr) 2005-05-11
EA006033B1 (ru) 2005-08-25
CA2469166C (fr) 2010-11-02
OA12742A (en) 2006-06-30
BR0214858A (pt) 2004-11-03

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