Abstract: An improved perforating apparatus that creates drain holes in well tubing without the use of explosives. A hydraulically-activated apparatus created from machined metal pipes and solid metal bars that form four main sections, a hollow metal pipe 10, hollow metal chamber 11, wedge holder 12, and a wedge stop 13. A drive disc 14, drive wedge 15, piston 16, metal button 17, shear screws 19, and wedge holder O-rings 20, a drive disc O-ring 21, a piston O-ring 30, and a wedge stop O-ring 31 complete and seal the apparatus. When perforating apparatus reaches a location to be perforated, an impact bar is manually-dropped into tubing string and hits top of the apparatus. The force of well fluid pressure on a drive disc 14 within the apparatus forces drive wedge 15 inside drive holder 12 to impact piston 16. Impact on piston 16 expels button 17 through well tubing, creating a drain hole.

Abstract: An improved perforating apparatus that creates drain holes in well tubing without the use of explosives. A hydraulically-activated apparatus created from machined metal pipes and solid metal bars that form four main sections, a hollow metal pipe 10, hollow metal chamber 11, wedge holder 12, and a wedge stop 13. A drive disc 14, drive wedge 15, piston 16, metal button 17, shear screws 19, and wedge holder O-rings 20, a drive disc O-ring 21, a piston O-ring 30, and a wedge stop O-ring 31 complete and seal the apparatus. When perforating apparatus reaches a location to be perforated, an impact bar is manually-dropped into tubing string and hits top of the apparatus. The force of well fluid pressure on a drive disc 14 within the apparatus forces drive wedge 15 inside drive holder 12 to impact piston 16. Impact on piston 16 expels button 17 through well tubing, creating a drain hole.

Abstract: An apparatus which includes an external housing (10) and a slotted internal sleeve (26) machined from cylindrical lengths of hollow metal pipe stock, and one or more partially-hollowed-out plug screws (16). This apparatus uses no seals or O-rings. The apparatus is attached between a tubing string of a well and a big bore pump. When activated, the apparatus permits fluids to drain from well tubing. The apparatus has only one moving part and is activated by pulling upward on sucker rods of a well, an action which causes the top of a big bore pump plunger to make contact with the sleeve and move the sleeve upward within the housing. The sleeve is secured inside the housing by one or more partially-hollowed-out plug screws which are sheared when the contact is made, exposing at least one opening. The opening in the sleeve aligns with the hole in the partially-hollowed-out plug screw caused by the shearing.

Abstract: The invention, as set forth in this disclosure, includes a perforating assembly for perforation of well tubing. This perforating assembly can be dropped by hand without attachments of any kind. The outside diameter of this manually-dropped tubing perforating assembly allows it to free fall within tubing to the plug or pump near the bottom of a well. It incorporates a firing head with secured frangible pin and only one moving part; and it can be detonated mechanically. After this apparatus reaches a plug or pump near the bottom of a well, an impact bar can be dropped by hand to hit the apparatus. This detonates an explosive charge which blasts a hole through the tubing. The apparatus remains in the tubing on top of the plug or pump, so when the tubing is pulled from the well, the apparatus is retrieved along with the tubing. The use of electric wireline or slickline operations to lower and to retrieve a perforator from a well is eliminated with the use of this invention.