CN213392112U

CN213392112U - Directional perforating gun for horizontal well

Info

Publication number: CN213392112U
Application number: CN202022307116.3U
Authority: CN
Inventors: 杨帆; 李元宏
Original assignee: Baoji Tongyuan Petroleum Drilling Tools Co ltd
Current assignee: Baoji Tongyuan Petroleum Drilling Tools Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-06-08
Anticipated expiration: 2030-10-16

Abstract

The utility model provides a directional perforating gun of horizontal well, including the rifle body and set up the joint at rifle body both ends, be equipped with the bullet frame in the rifle body, be equipped with the holding ring at bullet frame both ends, the holding ring is connected with the core and passes the explosion rod, it passes through the core and passes the explosion rod and support in the hole that connects through the bearing, be equipped with a plurality of bullet hole on the bullet frame, set up outer counter weight strip and interior counter weight strip respectively on the bullet frame and improve positioning accuracy, the perforating gun goes into the horizontal well down, even the bullet frame is at rifle internal rotation, the bullet frame also can rotate to predesigned orientation position under the action of gravity of outer counter weight strip and interior counter weight strip, the directional reliability of perforation has been improved, it does not have the deformation to have guaranteed the bullet frame simultaneously, set up the arc draw-in groove that can carry the perforation bullet in the bullet hole, the fixed connection and the.

Description

Directional perforating gun for horizontal well

Technical Field

The utility model relates to a directional perforating device, concretely relates to directional perforating gun of horizontal well.

Background

Perforation is an operation that a special energy-gathering material enters a preset horizon of a borehole to perform explosion perforation to allow fluid in underground strata to enter the perforation, and is generally applied to oil-gas fields and coal fields. Along with the development and exploitation of oil and gas fields, the exploitation of horizontal wells is in a trend of increasing day by day, and the perforation is used as a main finishing method in the exploration and exploitation of the oil and gas fields, and the process technology of the perforation also needs to be continuously updated and perfected. The existing energy-gathering perforating gun is widely applied, and energy-gathering jet flow is generated by the energy-gathering phenomenon of explosive to shoot off the stratum.

At present, the directional perforating device of domestic generally used realizes directional perforation through the mode of welding the balancing weight on the bullet frame in the perforating gun, because balancing weight is not enough, the perforating gun is when going into the pit, and the bullet frame can rotate thereupon, and perforation positioning accuracy is not high, influences perforation work, also can adjust the bullet frame through the mode that increases the balancing weight quality and rotate, but the balancing weight quality is too big, can strengthen the bearing load of bullet frame, makes bullet frame yielding crooked.

SUMMERY OF THE UTILITY MODEL

For solving the defects of the prior art, the utility model provides an improve positioning accuracy, guarantee the horizontal well directional perforating gun of bullet frame nothing deformation.

The technical scheme of the utility model is that: the utility model provides a directional perforating gun of horizontal well, includes the rifle body and sets up the joint at rifle body both ends, is equipped with the bullet frame at the internal bullet of being equipped with of rifle, is equipped with the holding ring at bullet frame both ends, and the holding ring is connected with the core and passes through the explosion rod, crosses the core and passes through the bearing support in the hole that connects, is equipped with a plurality of bullet hole on the bullet frame lower extreme is equipped with outer counter weight strip, outer counter weight strip has the part that upwards extends and avoid the bullet hole along bullet frame periphery the bullet frame inboard is equipped with interior counter weight strip, at each both sides are equipped with the arc draw-in groove that can clip the perforating bullet respectively about the bullet hole.

Preferably, the outer counterweight strip is arc-shaped, and the inner arc surface of the outer counterweight strip is attached to the outer circular surface of the bullet rack.

Preferably, the inner counterweight strip is arc-shaped, and the outer arc surface of the inner counterweight strip is attached to the inner circular surface of the bullet frame.

Preferably, the outer weight strip is welded to the periphery of the cartridge frame.

Preferably, the inner weight strip is fixedly installed in the bullet rack through screws.

The utility model has the advantages that: set up outer counter weight strip and interior counter weight strip respectively on the bullet frame and improve positioning accuracy, the perforating gun goes into the horizontal well down, even the bullet frame is at the internal rotation of rifle, the bullet frame also can be rotatory to predesigned orientation position under the action of gravity of outer counter weight strip and interior counter weight strip, has improved the directional reliability of perforation, has guaranteed simultaneously that the bullet frame does not have the deformation, sets up the arc draw-in groove that can clip the perforating bullet in the bullet hole, has guaranteed the fixed connection and the orientation of perforating bullet and bullet frame.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of a cartridge magazine.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model discloses technical scheme as follows: a horizontal well directional perforating gun comprises a gun body 1 and joints 2 arranged at two ends of the gun body 1, a cartridge frame 3 is arranged in the gun body 1, positioning rings 4 are arranged at two ends of the cartridge frame 3, the positioning rings 4 are connected with a core-passing detonation rod 5, in order to enable the cartridge frame 3 to rotate more flexibly, the core-passing detonation rod 5 is supported in an inner hole of the joint 2 through a bearing 6, a plurality of cartridge holes 7 are arranged on the cartridge frame 3, the cartridge frame rotates along with the rotation of the cartridge frame in the well descending process, perforating bullets cannot be oriented, an outer balance weight strip 8 is usually arranged at the lower end of the cartridge frame 3 to meet the requirement of perforating bullet directional, in order to increase the weight of the outer balance weight strip, the outer balance weight strip 8 is provided with a part which extends upwards along the periphery of the cartridge frame 3 and avoids the cartridge holes 7, in order to improve the positioning accuracy, as shown in figure 2, an inner balance weight strip 9 is arranged at the inner side of the cartridge frame 3, the perforating gun is descended into, the bullet frame 3 also can rotate to the pre-designed direction position under the action of gravity of outer counter weight strip 8 and interior counter weight strip 9, the directional reliability of perforation has been improved, because the perforating bullet includes shell portion and powder charge part, when the installation bullet hole, the shell portion of perforating bullet is heavier than the powder charge part, can't guarantee whether the angle of pitch of bullet hole aligns, consequently be equipped with respectively in both sides about each bullet hole 7 and clip the arc draw-in groove 10 of perforating bullet, it clips the perforating bullet to make arc draw-in groove 10 incurve through the instrument, the fixed connection and the orientation of perforating bullet and bullet frame have been guaranteed.

The outer balance weight strip 8 is arc-shaped, the inner arc surface of the outer balance weight strip 8 is attached to the outer circular surface of the bullet rack 3, the inner balance weight strip 9 is arc-shaped, and the outer arc surface of the inner balance weight strip 9 is attached to the inner circular surface of the bullet rack 3.

The outer counterweight strip 8 is welded on the periphery of the bullet frame 3.

For the convenience of disassembly, the inner weight strip 9 is fixedly installed in the cartridge frame 3 through screws.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a directional perforating gun of horizontal well, includes rifle body (1) and sets up joint (2) at rifle body (1) both ends, is equipped with cartridge frame (3) in rifle body (1), is equipped with holding ring (4) at cartridge frame (3) both ends, and holding ring (4) are connected with core booster rod (5), crosses core booster rod (5) and supports in the hole that connects (2) through bearing (6), is equipped with a plurality of bullet hole (7) on cartridge frame (3), its characterized in that: the perforating bullet device is characterized in that an outer balance weight strip (8) is arranged at the lower end of the bullet frame (3), the outer balance weight strip (8) is provided with a part which extends upwards along the periphery of the bullet frame (3) and avoids the bullet holes (7), an inner balance weight strip (9) is arranged on the inner side of the bullet frame (3), and arc-shaped clamping grooves (10) capable of clamping perforating bullets are respectively arranged on the upper side and the lower side of each bullet hole (7).

2. The horizontal well directional perforation gun according to claim 1, wherein: the outer balance weight strip (8) is arc-shaped, and the inner arc surface of the outer balance weight strip (8) is attached to the outer circular surface of the bullet rack (3).

3. The horizontal well directional perforation gun according to claim 1, wherein: the inner balance weight strip (9) is arc-shaped, and the outer arc surface of the inner balance weight strip (9) is attached to the inner circular surface of the bullet frame (3).

4. The horizontal well directional perforation gun according to claim 1 or 2, wherein: the outer counterweight strip (8) is welded on the periphery of the bullet frame (3).

5. The horizontal well directional perforation gun according to claim 1 or 3, wherein: the inner balance weight strip (9) is fixedly arranged in the bullet rack (3) through screws.