Oil-gas well perforator interlayer gun
A technology of interlayer gun and perforator, which is applied in the direction of wellbore/well components, mining fluid, earthwork drilling and mining, etc. It can solve the problems of gun body deformation, gun jamming, etc., and achieve the effect of ensuring safety and avoiding flattening
Active Publication Date: 2007-01-31
XIAN TONGYUAN PETROTECH
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Problems solved by technology
When the working pressure is high or the pressure difference between the inside and outside of the gun is large, the gun body of the interlayer gun is often flattened or caused a large deformation of the gun body, and the interlayer gun is stuck in the shaft, resulting in a gun jam accident
Method used
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[0012] Such as figure 1 , shown in FIG. 2: the perforator involved in the present invention includes an interlayer gun 1 and a perforating gun 2, which are connected by a joint 3 between the guns. Depending on the thickness of the interlayer between two oil layers, sometimes multiple interlayer guns need to be connected in series, and the interlayer guns are also connected through the joints between the guns. The sandwich gun 1 mainly includes a cylindrical gun body 4, a central tube 5 and a detonating cord 7 installed in the central tube 5. The two ends of the central tube 5 are inserted into the gun joint 3, and a sealing structure is arranged between the gun joint 3. The sealing structure can adopt a shaft groove sealing structure 8, that is, a sealing groove is provided on the outer surface of the central tube 5 ; The hole groove sealing structure 9 can also be used, that is, a sealing groove is opened in the inner hole of the gun joint 3 . Be threaded connection between...
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The invention belongs to the oil gas well mining area of technology, is a kind of oil gas well shoots the air band gun. It has a tube shape gun body, gun in vivo is equipped with the central tube, in the central tube is equipped with leads explodes the rope, the band gun beginnings and ends is equipped with the belt seal structure between the gun to attach, on gun body is equipped with links up outside gun in vivo to pass the hole, between said the seal structure is located in the center to attach about the gun between. The invention band gun gun body only plays the connection role between, but seals by between the central tube and the gun attaches realizes. Because on the gun body is equipped with passes the hole, he is playing the fluid channel role, therefore among them outside does not have the differential pressure, does not withstand the working pressure, therefore, cannot distort because of the bearing, thus has avoided the card gun accident occurrence.
Description
technical field [0001] The invention belongs to the technical field of oil and gas well exploitation, in particular to an interlayer gun for an oil and gas well perforator. Background technique [0002] In the perforation of oil and gas wells, one or more interlayer guns are commonly used between two oil layers to connect the perforating guns of the two oil layers, so as to complete the perforation of the two oil layers at the same time. At present, the gun body used in the interlayer gun of the perforator not only plays the role of connection, but also plays the role of sealing, and the detonating cord in the center tube of the gun body plays the role of transmitting detonation energy. Chinese patent CN1344858 discloses a kind of perforating interlayer gun anti-pollution protection method and device, wherein the interlayer gun has a cylindrical gun body, the gun body is provided with a central tube, the central tube is provided with a detonating cord, the gun body of the in...
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IPC IPC(8): E21B43/11
Inventor 李刚强周志华
Owner XIAN TONGYUAN PETROTECH