RU103843U1 - SMALL-SIZED DEVICE FOR JOINT OPENING AND GAS-DYNAMIC TREATMENT OF OIL AND GAS WELLS - Google Patents

Abstract

 1. Small-sized device for joint opening and gas-dynamic treatment of oil and gas wells with a removable framework, including cumulative charges (CG) and gas-generating charges (GGZ), detonating cord (LH) and an explosive cartridge, characterized in that the GGZ are located inside a metal case ( pipes) with grooves (holes) for the expiration of the combustion products, and sealed short-circuiting devices are placed on a rigid segmented frame in the form of a profiled tape, and the connection of the casings with GGZ and frames with short-circuiting is made through them IAOD. ! 2. The device according to claim 1, characterized in that the GGZ are made of compositions with different specific volumes of gaseous products of combustion and different rates of combustion.

Description

The utility model relates to the field of oil and gas production, in particular to perforating and blasting operations (TAP).

Well stimulation by the action of products of combustion of powder charges has long and successfully been used in the oil and gas industry.

Combining the operations of opening and gasdynamic treatment of the formation is a promising direction for the development of oil and gas production.

There are a large number of so-called complex impact devices that perform this task.

A device is known [A.S. USSR No. 202822, 1967, BI No. 20.] For simultaneous shooting of the walls of the well and fracturing, performed in separate sections with cumulative charges and powder chambers, which are flammable sequentially from delayed-action electric igniters. A significant drawback of this design is the difficulty of its implementation in a small-sized version (for work through tubing - tubing).

The same drawback is inherent in the Stim-Gun device [US Patent 5775426, MKI ³ EV 43/117. Apparatus and method for perforating and stimulating a subterranean formation. Claim 09.09.96, publ. 07/07/98,], which is a sleeve made of propellant-like propellant-like rocket material, placed around the outer surface of the perforator.

Known adopted for the prototype device [Certificate for utility model No. 34632, publ. 12/10/2003 g] small-sized for joint perforation of a well and pressure exposure of the combustion products of powder charges containing two gas-generating sections in the form of a set of tubular powder charges with a section with cumulative charges located between them and having a single detonation chain for initiating cumulative and powder charges, different the fact that cumulative and powder charges are located on a common removable frame, and the length of the section with cumulative charges correlates with the total length of each gasogen the section as 1: (1-3). The common removable frame is made in the form of one-two-layer profiled links with connecting elements that provide phasing of links with cumulative charges in the range of 0-60 °.

A common drawback of the above technical solutions is the potential possibility of an accident when working through tubing in high-temperature (> 120 ° C) wells due to the shape-changing of gas-generating charges (GGZ), reduction of their rigidity (softening) and loss, to a large extent, of bearing capacity.

The noted disadvantages are eliminated in the inventive small-sized device for joint opening and gas-dynamic treatment of oil and gas wells.

Figure 1 shows a General view of the device. Sealed cumulative charges (KZ) 1 are placed on a rigid frame (segmented, in the form of a profiled tape) 2, and gas-generating charges 3 are placed inside a metal case (pipe) 4 with grooves (holes) 5 for the expiration of combustion products. Cumulative charges are triggered by a detonating cord (DS) 6, initiated by an explosive cartridge 7. The assembly descends on cable 8 and is equipped with a cable head 9 and a tip 10.

The placement of the GGZ inside the metal pipe protects the charges from contact with possible violations of the casing (cement peel, previous perforation, etc.) and ensures an unchanged assembly size. In the event of a possible failure of the elements of the explosive chain (explosive cartridge, LH), the device will remain suitable for extraction from the tubing.

Depending on the geological and technical conditions (well design, depth, temperature, reservoir pressure, reservoir properties, etc.), it is possible to alternate bodies with gas condensate and frameworks with short circuit and perform gas condensation from compositions with different specific volumes of gaseous combustion products and various burning rate.

The device in the well operates as follows. Explosive cartridge 7, triggered by an electric impulse, activates the DS 6, which initiates short-circuit 1. Gas-generating charges 3 are ignited by the detonation products of the DS. 6. The cumulative jet formed during the explosion of each fault creates a channel in the reservoir. The combustion products of solid propellant charges develop channels into extended cracks.

The claimed technical solution was used by NTF PerfoTech CJSC in the development of new rotary hammer generators and tested in bench and range conditions.

Comparison of the proposed solutions with the prototype allows us to conclude that the criterion of "novelty".

Claims (2)

1. Small-sized device for joint opening and gas-dynamic treatment of oil and gas wells with a removable framework, including cumulative charges (CG) and gas-generating charges (GGZ), detonating cord (LH) and an explosive cartridge, characterized in that the GGZ are located inside a metal case ( pipes) with grooves (holes) for the expiration of the combustion products, and sealed short-circuiting devices are placed on a rigid segmented frame in the form of a profiled tape, and the connection of the casings with GGZ and frames with short-circuiting is made through them IAOD. 2. The device according to claim 1, characterized in that the GGZ are made of compositions with different specific volumes of gaseous products of combustion and different rates of combustion.