US2200683A - Core taking device - Google Patents

Core taking device Download PDF

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Publication number
US2200683A
US2200683A US60726A US6072636A US2200683A US 2200683 A US2200683 A US 2200683A US 60726 A US60726 A US 60726A US 6072636 A US6072636 A US 6072636A US 2200683 A US2200683 A US 2200683A
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US
United States
Prior art keywords
projectile
chamber
tube
gun
explosion
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.)
Expired - Lifetime
Application number
US60726A
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English (en)
Inventor
Schlumberger Marcel
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.)
Services Petroliers Schlumberger SA
Original Assignee
Societe de Prospection Electrique Schlumberger SA
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 Societe de Prospection Electrique Schlumberger SA filed Critical Societe de Prospection Electrique Schlumberger SA
Application granted granted Critical
Publication of US2200683A publication Critical patent/US2200683A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
    • E21B49/04—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil using explosives in boreholes; using projectiles penetrating the wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the initial velocities imparted to the projectiles must then be sufficient to force the said projectiles through one or more thicknesses of steel tube as well as through a thickness of several centimeters of cement.
  • the difficulty lies in the fact that as the bore holes have often diameters of less than 15 centimeters, the guns must be very short, say of the order of only a few centimeters.
  • One object of the present invention is to obviate these inconveniences, while obtaining a maximum length of way for the ejection of the projectile. Another object is to provide an ejection system as simple as possible, reliably as to its operation, easy to make and the use of which is comparatively inexpensive.
  • the invention consists essentially in arranging the explosion chamber annularly around the gun or around the projectile.
  • the gun itself particularly in the case of bullet perforators, it can be formed of a tube of special steel which is highly resistant to compression and which may be inserted laterally, into the cavity in the block formed by the perforating device.
  • the space between the walls of this tube and the lateral walls of the cavity into which it is inserted forms the annular explosion chamber.
  • This arrangement is of advantage in that it permits an extremely easy machining of the device and therefore the use of steel having an extremely high resistance, that being a security factor.
  • the parts which wear most quickly are the tubes of the gun, these tubes can be easily replaced when worn out without it being necessary to change the body of the perforator device itself, thereby accomplishing a saving in operating cost.
  • FIG. 1 is a diagrammatical longitudinal sectional view of a perforator with a plurality of guns according to the invention.
  • Fig. 2 is a diagrammatical longitudinal sectional view of another embodiment of the invention.
  • Fig. 3 is a cross sectional view on line 33 of Figure 2.
  • I is the cylindrical body of the perforator device which comprises, as is usual, an assembly of guns arranged one above another and the axes of which are preferably arranged angularly each with respect to the others.
  • This perforator body I which is made of steel having a high resistance, is provided with a numher of cavities 2 which form the explosion chambers. Into these cavities are screwed or inserted in any other manner the gun tubes 3 which are made of a steel highly resistant tocompression. Each gun tube 3 extends somewhat more than three quarters of the width of the body of the perforator, which is evidently the maximum length permissible therefor. A packing ring 4 securely seals the explosion chamber. The tube 3 does not fill the cavity 2, the latter being of such dimensions as to provide an annular space which forms, as above stated, the explosion chamber.
  • I is the body of the device in which are bored one above another horizontal holes 8 which form the tubes of the guns serving to eject sample-taking projectiles 9.
  • These projectiles themselves are formed of hollow cylindrical tubes which are closed in their rear ends and are connected with the guns through a flexible connection formed, for instance, of two cables I0 ( Figure 3); these cables serve, as is known, to draw the projectile after its ejection, out of the formation wall into which it has penetrated.
  • each bore 8 In the rear part of each bore 8 is provided in the material of the body I an explosion chamber ll into which the rear end. of the projectile 9 extends.
  • Explosion chamber H which is of annular form, entirely surrounds the rear part of the projectile when the latter is in position for firing.
  • the firing of the explosive charge contained in the chamber (2 or II) can be effected in any suitable manner, as for instance by means of fusible filaments l2 (Fig. 2) inserted into the explosion in these chambers and heated by the passage of an electric current.
  • the invention is applicable not only to the particular cases and uses herein tie-'- scribed, but to all cases and uses wherein it is desired to employ a gun (using that word in its broadest sense) which must needs be much abbreviated as to its length.
  • the invention is, however, of special utility in the operation of discharging projectiles within a bore-hole.
  • a device for shooting a projectile within a bore hole comprising a body adapted to be lowered or placed in said bore hole and having a combustion or powder chamber therein, a firing tube adapted to chamber a projectile, said tube projecting into said chamber with the inner end spaced from a wall of said chamber and its outer end secured to a. wall of said chamber and substantially fiush with the outer wall of said body, and means for igniting powder in said chamber.
  • a device for shooting a projectile within a bore hole comprising a body adapted to be lowered or placed .in said bore hole and having a combustion or powder chamber therein, a firing tube adapted to chamber a projectile, said tube projecting into said chamber with the inner end spaced from a wall of said chamber and its outer end secured to a wall of said chamber, and means for igniting powder in said chamber.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US60726A 1935-11-16 1936-01-24 Core taking device Expired - Lifetime US2200683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2200683X 1935-11-16

Publications (1)

Publication Number Publication Date
US2200683A true US2200683A (en) 1940-05-14

Family

ID=9684500

Family Applications (1)

Application Number Title Priority Date Filing Date
US60726A Expired - Lifetime US2200683A (en) 1935-11-16 1936-01-24 Core taking device

Country Status (2)

Country Link
US (1) US2200683A (enrdf_load_stackoverflow)
NL (1) NL44783C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456977A (en) * 1941-11-01 1948-12-21 Mccullough Tool Company Well casing perforating gun and cartridge
US2599040A (en) * 1947-11-08 1952-06-03 Clyde E Bannister Sample-taking and casing-perforating apparatus
US2695665A (en) * 1951-12-03 1954-11-30 B J Service Inc Front-firing gun perforator
US2773424A (en) * 1951-06-01 1956-12-11 Mordica O Johnston Gun perforator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456977A (en) * 1941-11-01 1948-12-21 Mccullough Tool Company Well casing perforating gun and cartridge
US2599040A (en) * 1947-11-08 1952-06-03 Clyde E Bannister Sample-taking and casing-perforating apparatus
US2773424A (en) * 1951-06-01 1956-12-11 Mordica O Johnston Gun perforator
US2695665A (en) * 1951-12-03 1954-11-30 B J Service Inc Front-firing gun perforator

Also Published As

Publication number Publication date
NL44783C (enrdf_load_stackoverflow)

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