US1786590A - Casing ripper - Google Patents

Casing ripper Download PDF

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Publication number
US1786590A
US1786590A US337279A US33727929A US1786590A US 1786590 A US1786590 A US 1786590A US 337279 A US337279 A US 337279A US 33727929 A US33727929 A US 33727929A US 1786590 A US1786590 A US 1786590A
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United States
Prior art keywords
bolt
casing
ripper
cutter
slot
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Expired - Lifetime
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US337279A
Inventor
Althausen Robert
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.)
EUREKA TOOL Co
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EUREKA TOOL Co
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 EUREKA TOOL Co filed Critical EUREKA TOOL Co
Priority to US337279A priority Critical patent/US1786590A/en
Application granted granted Critical
Publication of US1786590A publication Critical patent/US1786590A/en
Anticipated expiration legal-status Critical
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground

Definitions

  • This invention relates to oil well casing rippers and it contemplates a novel casing ripper which is capable of serving as an up ripper.
  • Fig. 1 is a vertical sectional view through an oil well casing showing the casing ripper partly in elevation and partly in section and Fig. 2 is a similar view showing the ripping tool in retractedposition.
  • the casing ripper is illustrated as comprising an elongated body portion 1 having a shank 2 at its upper end by means of which it may be secured to the suspending means in any convenient manner.
  • the body 1 is provided with an elongated vertical slot 22.
  • a bolt 28 having a tripping knob 29 at its lower end outside the head.
  • the bolt is provided with a cut-away portion 30 to provide a flat face against which a transverse pin 31 in the head 26 bears to prevent the bolt from turning so as to always present the notch 32 in line with a spring-actuated latch bolt 33 transversally located in the head 26, normally out of engagement with the notch 32 so that the weight of the knob will hold the bolt 28 in retracted position as shown in Figure 1.
  • the bolt or pin 5 pivotally supports the cutter 6.
  • the pin 16 in hole 35 supports one end of the spring 17 so that the free end of the spring 17 bears against one end of the cutter 6 to urge the toe 8 into cutting position.
  • the device If the device is to be used as an up ripper, it is lowered into the casing until it reaches the proper point in the casing, when it is pulled in an upward direction and being urged by the spring 17 into cutting engagement with the casing, it will rip the casing as shown in Figure 1. hen the proper cutting has been accomplished, the tool is lowered in the well until the foot or knob 29 contacts with the bottom of the well or other obstruction to push the inclined end 36 of the retractor bolt 28 against the lower edge of the cutter 6 to one side of the pivot 5 to Serial No. 337 ,279.
  • a casing ripper comprising an elongated slotted body member, an eccentrically pivoted cutter in the body member having a cutting portion projectable through the slot, a spring for normally urging the cutter into cutting engagement, a bolt projectable into the end of the slot to retract the cutter within the slot and a latch bolt for holding the firstnamed bolt in cutter retracting position.
  • a casing ripper comprising an elongated slotted body member, an eccentrically pivoted cutter in the body member having a cutting portion projectable through the slot, a spring for normally urging the cutter into cutting engagement, a bolt projectable into the end of the slot to retract the cutter within the slot, a latch bolt for holding the first named bolt in cutter retracting position, means for holding the first named bolt against rotation and means outside the elongated body for actuating the first named bolt.
  • a casing ripper comprising an el0n gated body having a slot. a cutting tool having a portion movable into and out of the slot, means for normally. urging the cutting tool outside the slot, a cutting tool retracting bolt slidable longitudinally in the body member and a latch bolt for holding the first named bolt in tool retracting position.

Description

Dec. 30, 1930. R. ALTHAUSEN GAS ING RIPPER Filed Feb. 4. 1929 TTOANEY Patented Dec. 30, 1930 UNITED STATES PATENT OFFICE ROBERT ALTHAUSEN, OF RANGER, TEXAS, ASSIGNOR TO THE EUREKA TOOL COMPANY, OF AUGUSTA, KANSAS, A CORPORATION OF KANSAS CASING RIPPER Application filed February 4, 1929.
This invention relates to oil well casing rippers and it contemplates a novel casing ripper which is capable of serving as an up ripper.
The novelty of the invention will be understood by reference to the following description in connection with the accompanying drawings in which:
Fig. 1 is a vertical sectional view through an oil well casing showing the casing ripper partly in elevation and partly in section and Fig. 2 is a similar view showing the ripping tool in retractedposition.
The casing ripper is illustrated as comprising an elongated body portion 1 having a shank 2 at its upper end by means of which it may be secured to the suspending means in any convenient manner. The body 1 is provided with an elongated vertical slot 22. At the lower end or head 26 of the body 1 is a vertical opening 27 in which is. a bolt 28 having a tripping knob 29 at its lower end outside the head. The bolt is provided with a cut-away portion 30 to provide a flat face against which a transverse pin 31 in the head 26 bears to prevent the bolt from turning so as to always present the notch 32 in line with a spring-actuated latch bolt 33 transversally located in the head 26, normally out of engagement with the notch 32 so that the weight of the knob will hold the bolt 28 in retracted position as shown in Figure 1. The bolt or pin 5 pivotally supports the cutter 6. The pin 16 in hole 35 supports one end of the spring 17 so that the free end of the spring 17 bears against one end of the cutter 6 to urge the toe 8 into cutting position.
If the device is to be used as an up ripper, it is lowered into the casing until it reaches the proper point in the casing, when it is pulled in an upward direction and being urged by the spring 17 into cutting engagement with the casing, it will rip the casing as shown in Figure 1. hen the proper cutting has been accomplished, the tool is lowered in the well until the foot or knob 29 contacts with the bottom of the well or other obstruction to push the inclined end 36 of the retractor bolt 28 against the lower edge of the cutter 6 to one side of the pivot 5 to Serial No. 337 ,279.
retract it within the tool body as shown in Figure 2. When the bolt 28 moves to full tool retracting position, the detent or latch bolt 33 will move into the notch 32 to hold the bolt 28 in the position shown in Figure 2 with the cutter 6 out of cutting position so that the ripper can be withdrawn.
I do not wish to be limited to the precise details of construction shown but reserve the right to make changes in form, proportion and minor details of construction without departing from the spirit of the invention or sacrificing any of its advantages.
What I claim and desire to secure by Letters Patent is 2- 1. A casing ripper comprising an elongated slotted body member, an eccentrically pivoted cutter in the body member having a cutting portion projectable through the slot, a spring for normally urging the cutter into cutting engagement, a bolt projectable into the end of the slot to retract the cutter within the slot and a latch bolt for holding the firstnamed bolt in cutter retracting position.
2. A casing ripper comprising an elongated slotted body member, an eccentrically pivoted cutter in the body member having a cutting portion projectable through the slot, a spring for normally urging the cutter into cutting engagement, a bolt projectable into the end of the slot to retract the cutter within the slot, a latch bolt for holding the first named bolt in cutter retracting position, means for holding the first named bolt against rotation and means outside the elongated body for actuating the first named bolt.
3. A casing ripper comprising an el0n gated body having a slot. a cutting tool having a portion movable into and out of the slot, means for normally. urging the cutting tool outside the slot, a cutting tool retracting bolt slidable longitudinally in the body member and a latch bolt for holding the first named bolt in tool retracting position.
In testimony whereof I alfix my signature.
US337279A 1929-02-04 1929-02-04 Casing ripper Expired - Lifetime US1786590A (en)

Priority Applications (1)

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US337279A US1786590A (en) 1929-02-04 1929-02-04 Casing ripper

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080178721A1 (en) * 2007-01-30 2008-07-31 Shane Schwindt Production casing ripper
US10900336B2 (en) 2018-10-02 2021-01-26 Exacta-Frac Energy Services, Inc. Mechanical perforator with guide skates
US10947802B2 (en) 2018-10-09 2021-03-16 Exacta-Frac Energy Services, Inc. Mechanical perforator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080178721A1 (en) * 2007-01-30 2008-07-31 Shane Schwindt Production casing ripper
US7581591B2 (en) 2007-01-30 2009-09-01 Liquid Gold Well Service, Inc. Production casing ripper
US10900336B2 (en) 2018-10-02 2021-01-26 Exacta-Frac Energy Services, Inc. Mechanical perforator with guide skates
US10947802B2 (en) 2018-10-09 2021-03-16 Exacta-Frac Energy Services, Inc. Mechanical perforator

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