WO1982002417A1 - Procede et dispositif permettant de changer la direction d'un trou de forage - Google Patents

Procede et dispositif permettant de changer la direction d'un trou de forage Download PDF

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Publication number
WO1982002417A1
WO1982002417A1 PCT/SE1982/000006 SE8200006W WO8202417A1 WO 1982002417 A1 WO1982002417 A1 WO 1982002417A1 SE 8200006 W SE8200006 W SE 8200006W WO 8202417 A1 WO8202417 A1 WO 8202417A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill hole
guide
reference surface
wedge
drilling
Prior art date
Application number
PCT/SE1982/000006
Other languages
English (en)
Inventor
Geologiska Undersoekning Sveriges
Original Assignee
Johansson Bengt Erik
Forsberg Signar
Norman Roger
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 Johansson Bengt Erik, Forsberg Signar, Norman Roger filed Critical Johansson Bengt Erik
Priority to DE19823228261 priority Critical patent/DE3228261A1/de
Publication of WO1982002417A1 publication Critical patent/WO1982002417A1/fr
Priority to FI823160A priority patent/FI823160L/fi

Links

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
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock

Definitions

  • This invention relates to rock drilling, and more precisely to a method of definitely changing the direction of a drill hole and to a device for carrying out the method.
  • the drill much too often deviates from the planned drilling direction to such an extent, that the goal would be totally missed if the drilling would continue in the same drill hole.
  • the inclination of a drill hole or its real direction can be determined by means of a drill hole inclination measuring instrument, for example of the kind disclosed in SE-PS 185 032, but so far no technique is known so to change or control the drilling direction that continued drilling in a drill hole deviating from the planned goal would lead to the goal in question.
  • a drill hole normally the drilling must be interrupted, and the driiling of a new hole must be commenced, which is both time-consuming and expensive and entirely unsatisfactory.
  • the present invention therefore, has the object to solve this problem, in such a manner, that from an existing drill hole the drilling can. be continued in any desired direction and from any level.
  • This object is achieved in that the method and device according to the invention have been given the characterizing features defined in the attached claims.
  • Figs. 1-3 are sections through a drill hole, illustrating different phases of the method according to the invention.
  • Fig. 4 is a perspective view of a cutting wedge according to the invention provided with a guide tongue
  • Fig. 5 is a section substantially along the line V-V in
  • Fig. 6 is a schematic perspective view of a portion of a test probe provided with an angle transmitter according to the invention.
  • the reference numeral 1 designates a rock drill hole, the direction of which is to be changed.
  • a drill hole inclination measuring instrument 2 inserted into the drill hole.
  • Said instrument as is shown chematically in Fig. 2, comprises in known manner a plummet wheel 3 for determining the inclination angle of the drill hole to the vertical plane, and a compass 4 for determining the extension of the drill hole in the horizontal plane.
  • the plummet wheel 3 and compass 4 are in known manner pivotally suspended in a cradle 6 freely oscillating in a foundation 5.
  • the axis of oscillation of the cradle 6 forms a right angle with the axes of oscillation 8 and, respectively, 9 of the plummet wheel and compass, and the centre of gravity of the cradle 6, like that of the compass and plummet wheel, is located beneath its axis of oscillation, whereby the mutually parallel axes of oscillation 7,8 of the compass and plummet wheel are maintained horizontal.
  • an expanding member of known type provided with a guide tongue 11 is moved down into the hole to intended depth by means of a drilling pipe of the drilling machine.
  • the expanding member 12 with the guide tongue 11 has been secured by means of shear rivets or in some other detachable manner, when the expanding member 12 has been moved down to the depth intended, it is secured by expanding against the drill hole wall 13, as shown in Fig. 1.
  • the rivets connecting the expanding member 12 to the drilling pipe are broken. The drilling pipe then can be taken out of the drill hole 1, and the expanding member 12 with its guide tongue 11 remains in the drill hole.
  • the numeral 14 designates in Figs. 2 and 6 generally a test probe 6, which in addition to the aforesaid drill hole inclination measuring instrument comprises an angle transmitter 15 and a guide tongue 16 fitting the guide tongue 11 anchored in the drill hole by the expanding member 12. Said test probe is connected to the cable 10 to be lowered into the drill hole 1 until the guide tongues 16 and 11 slide one into the other and abut each other in a mutually locked position by their plane surfaces 16a and, respectively, 11a. In order to be able to slide into one another, the guide tongues 11 and 16 are bevelled at their ends, as shown at 17 in Figs. 1-4.
  • the guide tongue 15 of the test probe is rigidly connected to the foundation 5 of the test probe, in which foundation the cradle 6 is pivotally mounted. Said rigid connection is established via an ins trument housing 18 at the embodiment shown in Fig. 2, at which embodiment the plane surface 16a of the guide tongue is shown aligning with the pivot axis 7 of the cradle, although this is not required for the device to function.
  • the angle transmitter 15 of the test probe consists of a resistance winding 19, which is attached to the foundation end wall 200 facing to the cradle in the form of a coil extending preferably circularly about the support point 21 of the cradle in the end wall 20, and of a contact means 22, which is connected to the cradle 5 and capable to co-operate with the resistance winding 19 for indicating the mutual angular position of the cradle and foundation.
  • a resistance winding 19 By rotating the foundation 5 relative to the cradle 6, thus, a varyingly great portion of the resistance winding 19 will be connected through the contact means, and thereby different resistance values are obtained, each of which corresponds to a predetermined angle of rotation between the foundation 5 and cradle 5.
  • the zero point preferably is chosen for the relative position between the foundation 5 and cradle 6, in which the plane surface 16a of the guide tongue is in parallel with the oscillation axes B and, respectively, 9 of the plummet wheel and compass.
  • said contact means can be engaged and disengaged by means of a pressure rod 23, which is actuated by an eccentric wheel 24, which via a transmission 26 is driven by an electric motor 25 controlled from the ground surface, which motor also is used for engaging and disengaging corresponding contact means (not shown) of the plummet wheel and compass.
  • the foundation 5 When the test probe 14 with its guide tongue 16 slides in on the guide tongue 11 fastened in the drill hole, the foundation 5 will be adjusted relative to the cradle 5 in response to said lastmentioned guide tongue 11, and when thereby the foundation 5 is turned relative to the cradle 6, this rotation is recorded by the angle transmitter 15 when its contact means 23 is contacted with the resistance winding.
  • a value of the size of the rotation is obtained which can be read on a measuring instrument located on the ground surface, which instrument is connected via the cable 10 to the test probe 14 and its angle transmitter 15.
  • the angle of rotation of the foundation and its guide tongue in relation to the vertical plane of the drill hole is measured, whereby the angular position of the plane surface 11a of the guide tongue 11 fastened in the drill hole 1 is accurately known.
  • Said measuring instrum ent for reading the angle of rctaticn of the foundation preferably is scaled from 0 to 360 and preferably should have an accuracy of measurement of - 0,5o.
  • the relative angle between the plane surface 27a of the guide tongue and guiding surface 28a of the wedge is determined by the angle of the guide tongue 11 in the drill hole and the desired drilling direction.
  • the wedge 28 thus connected with the guide tongue 27 now is connected in a detachable manner, for example by shear rivets, with the lower end of the drilling pipe and is moved by means of said pipe down into the drill hole 1, so that the two guide tongues 11 and 27 are caused to engage each other as intended in such a manner, that the plane surfaces 11a and 27a abut each other.
  • the guiding surface 28a of the wedge which preferably can be provided with a V-shaped guide groove 29 will face in the intended drilling direction for continued drilling to the intended goal.
  • the wedge 28 is released from the drilling pipe, for example by breaking the rivets connecting the drilling pipe to the wedge by means of a downwardly directe force on the drilling pipe, and the drilling pipe then is taken out of the drill hole.
  • the guide tongue 27 can be provided on its outer surface with some elastic material, which presses the guide tongue 27 against the fixed guide tongue 11, or with some other per se known locking means. Normally, however, such locking is not necessary, but the wedge 23 is retain in position by its dead weight and that of the guide tongue.
  • the guide surface 28a of the wedge 23 thus applied in the drill hole now is located in the desired drilling direction, and upon downward movement of the drill bit the wedge will guide the bit for continued drilling in the direction to the goal.
  • control measurements are carried out by means of known deviation measurement equipment, which controls are mad ar regular intervals, for example every fifth meter, for checking that the desired drilling direction is maintained.
  • the method according to the present invention can be applied to different types of drilling operations and implies great advant ages over the known art.
  • several branch holes can be cut from a main hole in desired directions, and thereby many expensive drilled meters can be saved, the surface transport of drill equipment is avoided, and no expensive and troublesome earth drilling is required.
  • Another possibility rendered feasible by the present' invention is drilling beneath, for example, lakes and moors where it is impossible to advance drilling equipment, and where the drilling equipment can be positioned to the side of the lake or moor.
  • the wedge-directed drilling according to the present invention further implies the great advantages that the drilling work is substantially cheaper, and the possibility of meeting a predetermined goal is very much increased.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

Procede de forage de roche permettant de guider le forage en continu dans un trou de forage dans une direction predeterminee s'ecartant de la direction du trou de forage. Afin d'obtenir un tel guidage d'un forage en continu une surface de reference (11a) est appliquee dans le forage (1) au niveau ou le changement de direction doit avoir lieu, la position angulaire de la surface de reference dans le trou de forage est determinee, et apres la determination de la position angulaire de cette surface de reference un coin de guidage et de coupe (28) est introduit a l'interieur du trou de forage, ce coin possedant une surface de guidage (28a) servant a guider le forage en continu et etant entraine par une deuxieme surface de guidage (27a) dans un emboitement de cooperation avec la surface de reference (11a) appliquee dans le trou de forage, et les deux surfaces de guidage (28a, 27a) du coin de guidage sont ajustees, par rapport a la position angulaire de la surface de reference dans le trou de forage ainsi qu'a la direction predeterminee, etablissant entre elles une relation mutuelle avant l'introduction du coin de guidage (28) a l'interieur du trou de forage (1), de maniere telle que la surface de guidage (28a) du coin de guidage servant a guider le forage en continu soit amenee dans la direction predeterminee a cooperer avec la surface de reference (11a) au moyen de la deuxieme surface de guidage (27a) du coin de guidage.
PCT/SE1982/000006 1981-01-13 1982-01-12 Procede et dispositif permettant de changer la direction d'un trou de forage WO1982002417A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19823228261 DE3228261A1 (de) 1981-01-13 1982-01-12 Verfahren und vorrichtung zum aendern der richtung eines bohrloches
FI823160A FI823160L (fi) 1981-01-13 1982-09-13 Foerfarande och anordning foer riktningsaendring av borrhaol

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8100147A SE421815B (sv) 1981-01-13 1981-01-13 Forfarande for riktningsendring av borrhal jemte anordning for genomforande av forfarandet
SE8100147810113 1981-01-13

Publications (1)

Publication Number Publication Date
WO1982002417A1 true WO1982002417A1 (fr) 1982-07-22

Family

ID=20342859

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1982/000006 WO1982002417A1 (fr) 1981-01-13 1982-01-12 Procede et dispositif permettant de changer la direction d'un trou de forage

Country Status (4)

Country Link
AU (1) AU8004482A (fr)
DE (1) DE3228261A1 (fr)
SE (1) SE421815B (fr)
WO (1) WO1982002417A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252528A2 (fr) * 1983-11-01 1988-01-13 Encore Drilling Company Limited Méthode et appareil de forage
EP0664372A2 (fr) * 1994-01-25 1995-07-26 Halliburton Company Biseau de déviation orientable
EP0685628A1 (fr) * 1994-06-02 1995-12-06 Sofitech N.V. Méthode et dispositif d'orientation d'un biseau de déviation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2241686A1 (en) * 1973-08-20 1975-03-21 Applied Tech Ass Gyroscopic method of testing alignment of a borehole - wherein a boring pipe instrumentation case signals azimuth and inclination
NO132653B (fr) * 1971-03-08 1975-09-01 Texaco Development Corp
DE2850090A1 (de) * 1977-12-02 1979-06-07 Sagem Vorrichtung zur untersuchung am azimut und an der neigung einer bohrleitung
GB2032490A (en) * 1978-10-27 1980-05-08 Baker Int Corp Anchoring Whipstocks in Well Bores

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO132653B (fr) * 1971-03-08 1975-09-01 Texaco Development Corp
FR2241686A1 (en) * 1973-08-20 1975-03-21 Applied Tech Ass Gyroscopic method of testing alignment of a borehole - wherein a boring pipe instrumentation case signals azimuth and inclination
DE2850090A1 (de) * 1977-12-02 1979-06-07 Sagem Vorrichtung zur untersuchung am azimut und an der neigung einer bohrleitung
GB2032490A (en) * 1978-10-27 1980-05-08 Baker Int Corp Anchoring Whipstocks in Well Bores

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Industriell Teknik No 6, June 1974, Patentprofylax 16/74 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0252528A2 (fr) * 1983-11-01 1988-01-13 Encore Drilling Company Limited Méthode et appareil de forage
EP0252528A3 (fr) * 1983-11-01 1989-07-05 Encore Drilling Company Limited Méthode et appareil de forage
EP0664372A2 (fr) * 1994-01-25 1995-07-26 Halliburton Company Biseau de déviation orientable
EP0664372A3 (fr) * 1994-01-25 1995-11-15 Halliburton Co Biseau de déviation orientable.
US5871046A (en) * 1994-01-25 1999-02-16 Halliburton Energy Services, Inc. Orienting, retrievable whipstock anchor
EP0685628A1 (fr) * 1994-06-02 1995-12-06 Sofitech N.V. Méthode et dispositif d'orientation d'un biseau de déviation

Also Published As

Publication number Publication date
DE3228261A1 (de) 1983-02-10
SE421815B (sv) 1982-02-01
AU8004482A (en) 1982-08-02

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