EP0220318A1 - Bohrlochschraubenmotor - Google Patents

Bohrlochschraubenmotor Download PDF

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Publication number
EP0220318A1
EP0220318A1 EP85904311A EP85904311A EP0220318A1 EP 0220318 A1 EP0220318 A1 EP 0220318A1 EP 85904311 A EP85904311 A EP 85904311A EP 85904311 A EP85904311 A EP 85904311A EP 0220318 A1 EP0220318 A1 EP 0220318A1
Authority
EP
European Patent Office
Prior art keywords
shaft
teeth
sleeve
housing
screw
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.)
Withdrawn
Application number
EP85904311A
Other languages
German (de)
English (en)
French (fr)
Inventor
Dmitry Fedorovich Baldenko
Moisei Timofeevich Gusman
Nikolai Fedorovich Mutovkin
Valery Igorievich Semenets
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.)
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT BUROVOI TEKHNIKI
Original Assignee
VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT BUROVOI TEKHNIKI
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 VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT BUROVOI TEKHNIKI filed Critical VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT BUROVOI TEKHNIKI
Publication of EP0220318A1 publication Critical patent/EP0220318A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to drilling technology and relates in particular to downhole screw motors.
  • the first method is rotary drilling, in which the motor is installed on the surface of the day, the rotary movement being transmitted to the chisel via a drill pipe.
  • the second method involves the use of motors that are located on the bottom of the borehole immediately above the chisel.
  • the drill pipe is immobile.
  • the second method has a number of obvious advantages: no energy expenditure for the rotation of the drill pipe, reduction of loads on the drill pipe and accordingly reduction of the number of accidents> etc.
  • the advantages of borehole bottom motors when drilling inclined holes are particularly evident.
  • the outer sleeve When pumping the liquid through the working organs, they begin under the Effect of an emerging pressure gradient to move relative to each other.
  • the outer sleeve In the typical motor scheme, the outer sleeve is stationary while the inner shaft makes a planetary motion - its axis describes a circle around the axis of the outer sleeve, and at the same time the inner shaft rotates about its own axis. This rotary motion is transmitted to the motor's output shaft.
  • Other types of movement of the work organs are also possible if, for example, the outer element rotates, but the inner element carries out an oscillating movement (guide movement). By changing the number of teeth and the length of the screw tooth pitch, you can achieve any (required) operating characteristic.
  • a liquid flow usually serves as the energy source for the work of the motor, but the motor can also be operated with ventilated liquid or compressed air.
  • the main disadvantage of the motors mentioned is a strong transverse vibration, which arises under the action of the specific movement of the internal element of the working organs.
  • the vibration causes premature failure of the working elements and the axial bearings of the motor and can lead to failure.
  • a downhole sole motor (U.S. Patent No. 4232751, I P KF 21 B 3/12) comprising an outer sleeve and, disposed inside, an inner shaft, a drive shaft and a sleeve for coupling the drive shaft and the outer sleeve .
  • This motor has disadvantages such as a large transverse vibration of the housing and considerable axial dimensions, which make it difficult to use the motor when drilling in an oblique direction.
  • the housing vibration caused by the planetary movement of the inner shaft is characterized by an uneven amplitude of the vibration over the length of the housing. This is due to the fact that, when the engine is running, the orientation of the inner shaft is disturbed under the effect of a pressure gradient acting on it.
  • a downhole screw motor as described in FR Patent 2242553, (IPK E 21 B 3/12, F 03 C 3/00).
  • this includes a housing with working elements mounted in its interior, which consist of two elements: an inner element, which is designed in the form of a shaft with screw teeth and is connected to the housing, and an outer element, which as Rifle is designed with internal screw teeth.
  • a chisel is attached to one end of the outer element, while the other end is connected to a supporting shaft arranged in the interior of the housing. Inside the supporting shaft is an element that connects the shaft with the screw teeth to the housing.
  • the vibration reduces the durability of the axial bearings of the motor, which are usually designed with rolling elements and are designed to absorb axial loads.
  • the increased vibration of the motor housing can loosen the threaded connection engine and to a malfunction in the borehole as well as to an excessive rapid wear of centering and calibration elements, which are attached to the motor housing during directional boring in an oblique direction.
  • Another disadvantage of this construction is an increased flow resistance in the channel of the supporting shaft due to the arrangement of the element for connecting the screw shaft and the housing within the supporting shaft.
  • the present invention has for its object to provide a motor, the construction of which makes it possible to significantly reduce the influence of transverse vibrations on the structural units of the motor.
  • This - object is achieved in that in a motor that contains a housing with working elements housed inside, one of which is designed in the form of a sleeve with internal screw teeth, which is connected to an output shaft that carries a chisel and in The housing is axially rotatably mounted, while the other working element is designed in the form of a shaft which is arranged inside the bush with the possibility of radial movement with simultaneous securing against rotation about its own axis and is provided with screw teeth which cooperate with the teeth of the sleeve. whose number exceeds the number of teeth of the shaft by one, according to the invention, elastic energy absorbers are arranged between the housing and the bush in the region of the screw teeth of the same.
  • the arrangement of the elastic energy absorbers between the housing and the rotatable sleeve in the area of their screw teeth makes it possible to considerably reduce the level of transverse vibration of the working organs.
  • the elastic energy absorbers make it possible to stabilize the orientation of the rotating bush, which in turn offers the possibility of evenly transmitting forces to the motor housing.
  • a liquid film that forms when the engine is running in the gap between the elastic energy absorbers and the sleeve also limits the bushing's vibrations in the transverse direction and reduces the friction in radial bearings.
  • the construction of the engine according to the invention makes it possible to considerably extend the operating time of the engine and its structural units.
  • the total length of the elastic energy absorbers is at least equal to the length of the portion of the sleeve provided with the screw teeth. This achieves the maximum possible reduction in the vibration level and ensures the most favorable conditions for the work of the engine components.
  • the length of the elastic energy absorber is less than the length of the portion of the sleeve provided with the screw teeth, full stabilization of the orientation of the rotating sleeve is not ensured, and the transverse forces are transmitted to the housing unevenly. In addition, specific loads per unit length of the elastic energy absorbers are high.
  • the package of elastic energy absorbers also acts as a seal that reduces leakage losses in the rinsing liquid.
  • the bottom hole screw motor contains a housing 1 (Fig.l), in which working elements are accommodated, which consist of two elements: an outer element, which is designed in the form of a sleeve 2 with inner screw teeth 2 ', and an inner element, which is designed in the form of a shaft 3 with outer screw teeth 3 '.
  • the number of screw teeth 2 'of the sleeve 2 exceeds the number of screw teeth 3' of the shaft 3 by one.
  • the number of teeth of the sleeve 2 is eleven and that of the shaft 3 is ten, although they are can change within wide limits depending on the technical requirements placed on the engine.
  • the bushing 2 is connected to an output shaft 4 which is mounted in the bearings 1 in axle bearings 5. At the end of the shaft 4 there is a bush 6 for connecting a chisel (not shown in FIG.) And a radial bearing 7 which accommodates the radial stresses which arise during operation of the chisel.
  • the shaft 3 is connected with the aid of a special element, in the present case with the aid of a flexible shaft 8, to a bushing 9, which in turn is immovably connected to the housing 1.
  • elastic energy absorbers 10 are arranged in the region of their screw teeth.
  • the total length of the elastic energy absorber 10 should not be less than the length of the section of the bushing 2 provided with the screw teeth 2 '.
  • the elastic energy absorbers can be constructed differently.
  • the energy absorbers are elastic and represent a metal-metal or rubber-metal friction combination set, which is in the form of two rings: an outer ring 11 and an inner ring 12 (Fig. 3).
  • the working surfaces of the metallic rings 11 and 12 can be reinforced with hard metal or another wear-resistant and corrosion-resistant coating.
  • a labyrinth seal in the form of rings 13 and 14 can be provided between the elastic energy absorbers 10, each of which is attached in the housing 1 and on the bush 2.
  • a labyrinth seal 15 which is arranged in the housing 1 (Fig. 4).
  • its surface 16 in the constriction zone is expediently conical (FIG. 5) with a widening in the flow direction of the liquid.
  • the bottom hole screw motor operatesanirm a - SEN.
  • the flushing fluid is fed to the working elements of the engine through a drill pipe.
  • the screw teeth 2 'and 3' of the bushing 2 and the shaft 3 form high pressure and low pressure spaces by coming into contact with one another.
  • a torque develops on the working organs under the effect of a pressure drop.
  • the bushing 2 begins to rotate and the torque is transmitted to the chisel via the output shaft 4 and the bushing 6.
  • a return torque that arises on the shaft 3 is transmitted to the bushing 9 and the housing 1 via the flexible shaft 8.
  • the shaft 3 is secured against rotation about its own axis with the aid of the flexible shaft 8, allowing radial displacement.
  • the axial load acting on the chisel and arising in the working elements is absorbed by the axle bearings 5.
  • the elastic energy absorbers 10 contribute to the fact that the rotational movement of the sleeve 2 is kept constant and transverse loads on the housing 1 are transmitted evenly.
  • the flushing liquid entering the elastic energy absorbers 10 forms a liquid film in the gap between the rings 11 and 12, which reduces the friction in the elastic energy absorbers 10 and additionally restricts the transverse vibrations of the sleeve 2.
  • the labyrinth seals 13 and 14 arranged between the elastic energy absorbers 10 improve the seal between the bushing 2 and the housing 1 and reduce leakage losses of the washing liquid.
  • the flow of a liquid serves as an energy source for the engine running, as water, clay rinsing of different densities and a ventilated liquid can occur. If required, engine operation with compressed gas is possible.
  • the most effective field of application of the invention is to bring down oil and gas probes, in particular straightening holes in an oblique direction and branched horizontal holes.
  • Another area of application may be the drilling of geological exploration wells, artesian wells for water supply and the drilling of auxiliary holes in ore mining.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Paper (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP85904311A 1985-04-26 1985-04-26 Bohrlochschraubenmotor Withdrawn EP0220318A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1985/000035 WO1986006443A1 (en) 1985-04-26 1985-04-26 Downhole screw motor

Publications (1)

Publication Number Publication Date
EP0220318A1 true EP0220318A1 (de) 1987-05-06

Family

ID=21616907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904311A Withdrawn EP0220318A1 (de) 1985-04-26 1985-04-26 Bohrlochschraubenmotor

Country Status (5)

Country Link
EP (1) EP0220318A1 (pt)
BR (1) BR8507202A (pt)
DK (1) DK595586A (pt)
NO (1) NO865238L (pt)
WO (1) WO1986006443A1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013178939A1 (fr) 2012-05-29 2013-12-05 Christian Bratu Pompe a cavites progressives
CN107893754A (zh) * 2016-04-13 2018-04-10 范秀红 一种电潜螺杆泵的使用方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2140791A5 (pt) * 1971-06-08 1973-01-19 Chare Jean
FR2242553B1 (pt) * 1973-09-03 1981-04-10 Tiraspolsky Wladimir
US3932072A (en) * 1973-10-30 1976-01-13 Wallace Clark Moineau pump with rotating outer member

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8606443A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013178939A1 (fr) 2012-05-29 2013-12-05 Christian Bratu Pompe a cavites progressives
FR2991402A1 (fr) * 2012-05-29 2013-12-06 Christian Bratu Pompe a cavites progressives
US9506468B2 (en) 2012-05-29 2016-11-29 Pcm Technologies Progressive cavity pump with uncoupled natural frequency
CN107893754A (zh) * 2016-04-13 2018-04-10 范秀红 一种电潜螺杆泵的使用方法

Also Published As

Publication number Publication date
WO1986006443A1 (en) 1986-11-06
BR8507202A (pt) 1987-08-04
DK595586D0 (da) 1986-12-11
NO865238L (no) 1986-12-22
DK595586A (da) 1986-12-11

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Effective date: 19881103

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GUSMAN, MOISEI TIMOFEEVICH

Inventor name: MUTOVKIN, NIKOLAI FEDOROVICH

Inventor name: BALDENKO, DMITRY FEDOROVICH

Inventor name: SEMENETS, VALERY IGORIEVICH