US20150114722A1 - Downhole screw motor - Google Patents

Downhole screw motor Download PDF

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Publication number
US20150114722A1
US20150114722A1 US14/398,128 US201314398128A US2015114722A1 US 20150114722 A1 US20150114722 A1 US 20150114722A1 US 201314398128 A US201314398128 A US 201314398128A US 2015114722 A1 US2015114722 A1 US 2015114722A1
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US
United States
Prior art keywords
sealing
stator
mud
liquid
gas
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
Application number
US14/398,128
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English (en)
Inventor
Alibi Akhmejanov
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20150114722A1 publication Critical patent/US20150114722A1/en
Abandoned legal-status Critical Current

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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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/02—Fluid rotary type drives
    • 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
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0085—Adaptations of electric power generating means for use in boreholes
    • 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
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E21B44/005—Below-ground automatic control systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0007—Radial sealings for working fluid
    • F04C15/0019—Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/008—Pumps for submersible use, i.e. down-hole pumping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors

Definitions

  • the invention relates to drilling equipment.
  • a downhole screw motor comprising a body; a stator, fixed inside a body; a rotor, placed inside a stator; a spindle assembly; in the above motor the cover (made of elastomer, for example, rubber) fixed on the stator and having an internal screw surface, is used as contact elastic sealing agent between a metal rotor and a stator.
  • the cover made of elastomer, for example, rubber
  • a downhole screw motor comprising a body; a stator, fixed inside a body, a rotor placed inside a stator; the quantity of screw lobes of a rotor is one less than a stator, a spindle assembly; in the motor the cover (made of elastomer, for example, rubber) applied on the metal frame of a rotor, is used as contact elastic sealing agent between a rotor and a stator.
  • a downhole screw motor comprising a body; a stator, fixed inside a body; a rotor, placed inside a stator; the quantity of screw lobes of a rotor is one less than a stator, a spindle assembly; in the motor the following system is used as a sealing system—screw cavities have been milled on the body; hollow hoses of special profile are put inside above screw cavities; one end of a special profile hose is plugged, and other end is connected to a common manifold; above the hoses, inside the body a rubber stator is cured-on so that stator's screw surface is coincident with screw cavities of a body; the hose cavity through manifold and back pressure valve built in a body are filled in with oil under pressure and by that the hoses filled by oil to a certain level, are designed for compensating for wear of a stator top.
  • the applied sealing agents are characterized by increased wear, reduced strength, reduced heat-resistant feature, not wide temperature and pressure range for operation, impossibility of efficient control for the sealing agent temperature to maintain a constant working temperature, impossibility to eliminate the overheating resulting in rubber destruction; the use of rubber for the sealing of moving elements in known downhole motors reduce the effectiveness, performance coefficient and motor operational life, decrease drilling efficiency.
  • Technical object of the invention is creation of a new downhole screw motor removing the above mentioned disadvantages of prior art, which will ensure a higher effectiveness, increasing performance coefficient of a motor and motor operational life, improving of drilling efficiency.
  • a sealing system a spindle assembly in accordance with an invention as a sealing system
  • a system which consists of a contact elastic, multilayered sealing agent rigidly connected either with a stator or with a rotor or consists of two sealing agents, which are separately rigidly connected one with a stator, the other with a rotor; moreover a tough straps (made of strong material, for example, metal) making layers in a sealing agent, have close ring-like shapes and are similar to the surface, to which they are fixed; the quantity of layers of a sealing agent is not more than six; in the layers gas and/or liquid is used as sealing media; a sealing system contains a separation joint of drilling mud flow, electrogenerating turbine, a pumping unit for
  • FIG. 1 is a general scheme of an offered downhole screw motor.
  • FIG. 2 is a scheme containing a part of contact elastic, multilayered sealing agent
  • FIG. 3 and FIG. 4 are sectional elevations A and B accordingly.
  • a downhole screw motor comprises a stator 1 , a rotor 2 , a sealing system containing a separation joint of drilling mud flow 3 , a contact elastic, multilayered sealing agent 4 , rigidly connected with a stator 1 , moreover a tough straps 5 making layers in a sealing agent 4 , have close ring-like shapes and are similar to the surface, to which they are fixed, tank-stabilizer with gas 6 , a compressor 7 , tank-stabilizer with liquid 8 , a pump 9 , a heat exchanger for gas cooling 10 , a heat exchanger for liquid cooling 11 , an electrogenerating turbine (electric generator) 12 , pumping unit for drill mud 13 , regulating units of movement direction of sealing media and drill mud 14 (for example, back pressure valves), a mud hopper 15 , ACS 16 .
  • tank-stabilizer with gas 6 a compressor 7 , tank-stabilizer with liquid 8 , a pump 9 , a heat exchanger for gas cooling 10 , a heat
  • sealing media gas- 18 and liquid- 19 are used in a downhole screw motor.
  • Offered downhole screw motor operated as follows.
  • High pressure supplied drill mud enters a separation joint of drilling mud flow 3 and is divided into three flows.
  • the first flow forms a main flow of drill mud and is consumed directly for operation of a downhole screw motor providing a running torque of a rotor 2 relative to a stator 1 .
  • the second flow is directed to an electrogenerating turbine 12 , the third flow—to heat exchanger for gas cooling 10 and heat exchanger for liquid cooling 11 .
  • Drill mud is a working substance of an electrogenerating turbine 12 , drill mud passing through an electrogenerating turbine generates electric energy to power equipment elements.
  • Drill mud also used as cooling agent in heat exchangers 10 and 11 , applied in order to control temperature of sealing media of a sealing system of an offered downhole screw motor.
  • a separation joint of drilling mud flow 3 is managed by ACS 16 , which increases or decreases the quantity of bleed drill mud for the operation of electrogenerating turbine 12 depending on required horse power of appropriate consumer of an offered device. Also under the control of ACS a separation joint of drilling mud flow 3 , changing the quantity of drill mud delivered to heat exchangers 10 and 11 , ensures the temperature control of sealing media (gas and liquid) in a sealing system.
  • ACS 16 managed by ACS 16 tank-stabilizers 6 and 8 , a compressor 7 , a pump 9 , heat exchangers 10 and 11 regulate pressure and flow rate of sealing media (gas and liquid), increasing or decreasing permeability of clearance between a stator and a rotor, in the same way allow to regulate rotational torque of a downhole screw motor and to control drilling process, it is of great importance and significantly distinguishes an offered subject matter from the prior art.
  • ACS 16 besides the specified operations of regulation and control, ensures the forcing of drill mud through electrogenerating turbine 12 , regulating units of movement direction of sealing media and drill mud 14 and provides the delivery of waste mud to pumping unit for drill mud 13 followed by accompanied by connection with main flow of drill mud.
  • Tank-stabilizer with gas 6 and tank-stabilizer with liquid 8 allow operating relatively a compressor 7 and a pump 9 with different efficiency, depending on the change of power on a shaft of a rotor 2 of a downhole screw motor. Additionally the design of tank-stabilizers 6 and 8 ensures the presence of initial pressure and ensures the possibility of compensation of dynamic impulse and temperature expansion of gas and liquid during the operation and motion of a drilling system in rock formation having a definite temperature gradient. Tank-stabilizers 6 and 8 together with a compressor 7 and a pump 9 allow control a sealing system creating an opportunity to control rotational torque on a rotor 2 within a specified range, namely bypassing through a contact elastic, multilayered sealing agent 4 more or less of sealing media.
  • Availability of a compressor 7 and a pump 9 ensures continuous pumping of sealing media through sealing layers 4 , as well as through heat exchangers for gas and liquid 10 and 11 .
  • Sealing media (gas and liquid) heated during operation enter relatively to heat exchangers 10 and 11 .
  • Heat removal is ensured by delivery of drill mud as a cooling agent as per classical scheme for such type of equipment.
  • Regulating units of movement direction of sealing media and drill mud 14 applied in the device prevent the back motion of drill mud and sealing media (gas and liquid), ensure the unidirectionality of motion.
  • a mud hopper 15 ensures the delivery of a waste drilling mud after heat exchangers 10 and 11 and after electrogenerating turbine 12 back to main flow of drill mud and directs it to a pumping unit for drill mud 13 .
  • drill mud is sent directly to hollow spaces of operating chambers of a gerotor mechanism, the hollow spaces formed by a stator 1 and a rotor 2 .
  • a rotational torque, arising on a rotor 2 causes its eccentric motion regarding a stator 1 , the eccentric motion then transforms into rotating motion of a shaft of a spindle assembly (not shown in Figures.).
  • Drill mud from operating chambers enters rock destruction tool and then the downhole.
  • sealing media may be composed of liquid and gas phases
  • the layers in sealing agent may be composed of liquid of similar or different density and viscosity, and may contain or not contain the layer with gas phase—the choice of sealing media depends on a designated task.
  • One of the best options of an offered subject is above described case when the layers of sealing media, containing separately gas and liquid, interchange in a contact elastic, multilayered sealing agent; in case of such interchange of layers, optimum efficiency of control of elastic and heat exchange properties of system can be reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Sealing Devices (AREA)
US14/398,128 2012-05-30 2013-05-06 Downhole screw motor Abandoned US20150114722A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KZ20120632 2012-05-30
KZ2012/0632.1 2012-05-30
PCT/KZ2013/000006 WO2013180560A2 (fr) 2012-05-30 2013-05-06 Moteur à vis de fond

Publications (1)

Publication Number Publication Date
US20150114722A1 true US20150114722A1 (en) 2015-04-30

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Application Number Title Priority Date Filing Date
US14/398,128 Abandoned US20150114722A1 (en) 2012-05-30 2013-05-06 Downhole screw motor

Country Status (3)

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US (1) US20150114722A1 (fr)
EA (1) EA024018B1 (fr)
WO (1) WO2013180560A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525867A (zh) * 2015-07-02 2016-04-27 山东东远石油装备有限公司 熔覆有陶瓷涂层的螺杆钻具转子及其制作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107819363B (zh) * 2016-09-12 2020-01-07 中国石油天然气集团公司 马达定子及其制造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139035A (en) * 1960-10-24 1964-06-30 Walter J O'connor Cavity pump mechanism
US4051909A (en) * 1976-11-22 1977-10-04 P.E.I. Incorporated Turbine drill for drilling at great depths
US4614232A (en) * 1984-03-19 1986-09-30 Norton Christensen, Inc. Device for delivering flowable material
US4635735A (en) * 1984-07-06 1987-01-13 Schlumberger Technology Corporation Method and apparatus for the continuous analysis of drilling mud
US5171138A (en) * 1990-12-20 1992-12-15 Drilex Systems, Inc. Composite stator construction for downhole drilling motors
US7185719B2 (en) * 2002-02-20 2007-03-06 Shell Oil Company Dynamic annular pressure control apparatus and method

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SU1717782A1 (ru) * 1989-05-31 1992-03-07 Ивано-Франковский Институт Нефти И Газа Винтовой забойный двигатель
RU2011778C1 (ru) 1989-09-21 1994-04-30 Пермский филиал Всероссийского научно-исследовательского института буровой техники Винтовой забойный двигатель
RU2119035C1 (ru) * 1997-01-06 1998-09-20 Вячеслав Алексеевич Ряшенцев Роторно-винтовой гидравлический двигатель
DE19827101A1 (de) * 1998-06-18 1999-12-23 Artemis Kautschuk Kunststoff Nach dem Moineau-Prinzip arbeitende Maschine für den Einsatz in Tiefbohrungen
RU2145012C1 (ru) 1999-02-23 2000-01-27 Ульяновский государственный технический университет Устройство для устранения резонансной вибрации корпуса длинномерной конструкции
US7523792B2 (en) * 2005-04-30 2009-04-28 National Oilwell, Inc. Method and apparatus for shifting speeds in a fluid-actuated motor
CN101600851A (zh) * 2007-01-08 2009-12-09 贝克休斯公司 动态控制钻进故障的钻进组件和系统及利用该钻进组件和系统进行钻井的方法
US20100038142A1 (en) * 2007-12-18 2010-02-18 Halliburton Energy Services, Inc. Apparatus and method for high temperature drilling operations
WO2011084040A2 (fr) * 2010-01-05 2011-07-14 Alibi Akhmejanov Procédé de blocage d'éléments mobiles et dispositif permettant de le réaliser

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139035A (en) * 1960-10-24 1964-06-30 Walter J O'connor Cavity pump mechanism
US4051909A (en) * 1976-11-22 1977-10-04 P.E.I. Incorporated Turbine drill for drilling at great depths
US4614232A (en) * 1984-03-19 1986-09-30 Norton Christensen, Inc. Device for delivering flowable material
US4635735A (en) * 1984-07-06 1987-01-13 Schlumberger Technology Corporation Method and apparatus for the continuous analysis of drilling mud
US5171138A (en) * 1990-12-20 1992-12-15 Drilex Systems, Inc. Composite stator construction for downhole drilling motors
US7185719B2 (en) * 2002-02-20 2007-03-06 Shell Oil Company Dynamic annular pressure control apparatus and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105525867A (zh) * 2015-07-02 2016-04-27 山东东远石油装备有限公司 熔覆有陶瓷涂层的螺杆钻具转子及其制作方法

Also Published As

Publication number Publication date
EA201300574A1 (ru) 2013-12-30
WO2013180560A2 (fr) 2013-12-05
EA024018B1 (ru) 2016-08-31
WO2013180560A3 (fr) 2014-10-02

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