CN201262072Y

CN201262072Y - Screwing type inner blind hole composite perforating tool

Info

Publication number: CN201262072Y
Application number: CNU2008200907381U
Authority: CN
Inventors: 屈峰; 张晓东; 杨彬
Original assignee: Daqing Oilfield Co Ltd
Current assignee: Daqing Oilfield Co Ltd
Priority date: 2008-08-23
Filing date: 2008-08-23
Publication date: 2009-06-24
Anticipated expiration: 2018-08-23

Abstract

The utility model relates to a composite perforating gun with a screw-up type inner blind hole, which mainly solves the problem that the coaxiality of the pressure relief hole and the inner blind hole on the gun body of the prior perforating gun is low and the gun carrier moves in the axial direction inside the gun body. An inner blind hole (11) which is coaxial with a stepped pressure relief hole (10) is formed on a gun body (3), and a thrust face (16) and a positioning groove (17) are formed on the upper side and the lower side of the inner blind hole (11); and one end of a gun carrier (8) is sequentially connected with an auxiliary positioning disc (5) and a press body (4), the shoulder part of the press body (4) is positioned on the thrust face (16), the other end thereof is connected with a main positioning disc (13), and a positioning pin (12) on the main positioning disc (13) is clamped inside the positioning groove (17). The perforating gun improves the coaxiality of the center of a gun charging hole on the gun carrier and the center of the inner blind hole on the gun body, so as to improve the alignment during shooting, increase the burst height, increase the perforating depth into a rock formation, and broaden the crack of the rock formation, thereby increasing oil impregnation.

Description

Blind hole composite perforator in the screwing type

Technical field

The utility model relates to a kind of perforator used in oil, the natural gas exploration and development operation, blind hole composite perforator in especially a kind of screwing type.

Background technology

In the oil and natural gas development operation, behind stratum about fixed sleeving, the packing, need be finished by some ducts and set up the oil gas flow channel between sleeve pipe and oil-gas Layer, oil gas enters pit shaft by these passages, flows to ground.And these ducts are to be finished by perforator, and the penetration depth of perforator, pore size and hole density are the principal elements that influences the oil gas well capacity, and penetration depth is dark more, the aperture is big more, hole density is high more, and the oil gas well capacity is just high more.Effectively wear deeply in order to pursue, each oil field has begun blind hole perforator in a large amount of the use in recent years, the height of burst of interior blind hole perforator is higher, external mutually blind hole perforator, use the perforating bullet of identical bullet shape, interior blind hole is worn bigger deeply, yet because of the axiality of relief hole on the interior blind hole perforator rifle body and interior blind hole low, anchor point was inaccurate when firing mount was installed, make firing mount in the rifle body, produce axial motion again, directly influence the registration at interior blind hole center on the center that shoots the hole on the firing mount and the rifle body, thereby influence the height of burst of perforator and the perforating depth and the oil impregnate amount of rock stratum.

The utility model content

In order to improve the relief hole on the perforator rifle body and the axiality of interior blind hole, and avoid the axial motion of firing mount in the rifle body, the utility model provides blind hole composite perforator in a kind of screwing type, and the interior blind hole of this perforator and relief hole are because of adopting time processing moulding axiality height; Owing to adopt end location in the rifle body, the center of interior blind hole and relief hole is coaxial on the mounting means of other end tension, the center that guarantees to shoot on the firing mount hole and rifle body.

The technical solution of the utility model is: blind hole composite perforator in a kind of screwing type, comprise the rifle body that has the pressure release shoulder hole and have the firing mount that shoots the hole, interior blind hole with pressure release shoulder hole coaxial inner conductor is arranged on the rifle body, interior blind hole thrust surface and locating slot arranged respectively up and down; One end of firing mount is auxiliary connection positioning disk and fastening body successively, and the shoulder of fastening body is seated on the thrust surface, and the other end connects main positioning disk, and the alignment pin on the main positioning disk is stuck in the locating slot.

Described pressure release shoulder hole, shoot the hole and in blind hole be axial spacing 62.5mm, radially 90 ° of four phase place right-hand screw distributes.

The beneficial effects of the utility model are: because firing mount one end is equipped with main positioning disk, carry out end location, the other end has secondary positioning disk and fastening body, rotatably compress body, firing mount can be strained, avoid firing mount axial motion in the rifle body, and pressure release shoulder hole on the rifle body and interior blind hole time processing form, so two hole axiality height, so this perforator can be so that the center of blind hole and pressure release shoulder hole be coaxial on the center that shoots the hole on the firing mount and the rifle body, during the raising explosion to bit rate, make the height of burst of perforator increase to some extent, improved the perforating depth of rock stratum, the once big crack of rock stratum, thus increase the oil impregnate amount.

Description of drawings

Accompanying drawing 1 is a blind hole composite perforator structural representation in the screwing type;

Accompanying drawing 2 is a blind hole composite perforator lance body structure schematic diagram in the screwing type;

Accompanying drawing 3 is a blind hole composite perforator firing mount structural representation in the screwing type;

Accompanying drawing 4 is a blind hole composite perforator top connection structural representation in the screwing type;

Accompanying drawing 5 is a blind hole composite perforator lower contact structural representation in the screwing type.

The secondary positioning disk 6-of 1-top connection 2-sealing ring 3-rifle body 4-fastening body 5-holding screw 7-shoots blind hole 12-alignment pin 13-master positioning disk 14-top wire hole 15-lower contact 16-thrust surface 17-locating slot 18-internal thread 18 19-sealing surface 20-external screw thread 21-stopper slots in the hole 8-firing mount 9-centering ring 10-pressure release shoulder hole 11-

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

Shown in accompanying drawing 1, this perforator mainly comprises rifle body 3 and is positioned at the firing mount 8 of rifle body 3, the top connection 1 and the lower contact 15 that are connected with rifle body 3 at the two ends of firing mount 8.

Shown in accompanying drawing 2, some interior blind hole 11 and pressure release shoulder holes 10 that radially are 90 ° of four phase place right-hand screw distribution, axial spacing 62.5mm are arranged on the perforator rifle body 3, and there is internal thread 18, sealing surface 19 and the top wire hole 14 that connects in top connection 1, lower contact 15 at rifle body 3 two ends; There is locating slot 17 in the bottom of blind hole 11 in pressure release shoulder hole 10 reaches, and there is thrust surface 16 top; After 10 processing of pressure release shoulder hole, milling cutter directly enters blind hole 11 in the processing from pressure release shoulder hole 10, and then fills up the sticking pressure release shoulder hole 10 of mending with hinge, blind hole 11 and the raising of 10 liang of holes of pressure release shoulder hole axiality in making.

Shown in accompanying drawing 3, one end of this perforator firing mount 8 is the main positioning disks 13 that are threaded with it, alignment pin 12 is arranged on the circumference of main positioning disk 13, main positioning disk 13 is by being threaded and holding screw 6 is fixed on the firing mount 8, the other end of firing mount 8 is threaded with secondary positioning disk 5, and be fixed on the firing mount 8 by holding screw 6, being threaded with secondary positioning disk 5 is fastening body 4; Distribute on the firing mount 8 somely be radially that 90 ° of four phase place right-hand screw distributes, axial spacing 62.5mm shoot hole 7, with interior blind hole 11 and pressure release shoulder hole 10 coaxial inner conductors on the rifle body 3; Centering ring 9 is arranged on firing mount 8, cooperate with rifle body 3 inner surface axials, set upright the axis of firing mount 8, make the axis coaxle of itself and rifle body 3 by its external cylindrical surface.

Shown in accompanying drawing 4 and accompanying drawing 5, sealing ring 2, the external screw thread 20 that is connected with rifle body 3 two ends internal threads 18 that cooperates with the sealing surface 19 at rifle body 3 two ends arranged respectively in this perforator top connection 1 and the lower contact 15 and make top connection 1 and stopper slot 21 that lower contact 15 is located at rifle body 3 two ends.

1 to shown in the accompanying drawing 5 in conjunction with the accompanying drawings, the erection sequence of these each parts of perforator is: the threaded one end at firing mount 8 connects main positioning disk 13 and fixing by holding screw 6 earlier, other end auxiliary connection positioning disk 5 and by holding screw 6 fixing (as Fig. 2), the end that one end of secondary then positioning disk 5 has a locating slot 17 from rifle body 3 is packed in the rifle body 3, alignment pin 12 on its main positioning disk 13 is stuck in the locating slot 17 in the rifle body 3, then fastening body 4 is packed into and screw thread is linked on the secondary positioning disk 5 and screwed simultaneously from the other end of rifle body 3, the interstation of fastening body 4 is withstood on the thrust surface 16 of rifle body 3 endoporus, and firing mount 8 is fixed in the rifle body 3, it is moving to avoid firing mount 8 to go here and there in rifle body 3; Centering ring 9 on the firing mount 8 cooperates with the inner surface axial of rifle body 3 by its external cylindrical surface, sets upright the axis of firing mount 8, makes the axis coaxle of itself and rifle body 3.The center of blind hole 11 and pressure release shoulder hole 10 overlaps in so just making on the center that shoots hole 7 and the rifle body 3 on the firing mount 8.Be connected by the internal thread 18 of the external screw thread 20 in top connection 1 and the lower contact 15 at last with rifle body 3 two ends, withstand in the stopper slot 21 of top connection 1 and lower contact 15 by the top wire hole on the rifle body 3 14 by jackscrew then, prevent that lower contact (1,15) from moving axially, simultaneously by the inner sealing surface 19 formation sealings of the sealing ring on the upper and lower joint (1,15) 2 with rifle body 3 two ends.

This perforator is carried out end location because firing mount one end is equipped with main positioning disk 13, and the other end has secondary positioning disk 5 and fastening body 4, rotatably compresses body 4, firing mount 8 tensions can be avoided firing mount 8 axial motion in rifle body 3; In addition, because the pressure release shoulder hole 10 on the rifle body 3 once radially processes with interior blind hole 11, two hole axiality height, guarantee that the center of interior blind hole 11 and pressure release shoulder hole 10 overlaps on the center that shoots hole 7 and the rifle body 3 on the firing mount 8, when improving explosion to bit rate, make the height of burst of perforator increase to some extent, improved the perforating depth of rock stratum, once the big crack of rock stratum, thus the oil impregnate amount increased.

Claims

1, blind hole composite perforator in a kind of screwing type, comprise the rifle body (3) that has pressure release shoulder hole (10) and have the firing mount (8) that shoots hole (7), it is characterized in that: the interior blind hole (11) with pressure release shoulder hole (10) coaxial inner conductor is arranged on the rifle body (3), interior blind hole (11) thrust surface (16) and locating slot (17) arranged respectively up and down; One end of firing mount (8) is auxiliary connection positioning disk (5) and fastening body (4) successively, and the shoulder of fastening body (4) is seated on the thrust surface (16), and the other end connects main positioning disk (13), and the alignment pin (12) on the main positioning disk (13) is stuck in the locating slot (17).

2, blind hole composite perforator in the screwing type according to claim 1 is characterized in that: pressure release shoulder hole (10), shoot hole (7) and in blind hole (11) be axial spacing 62.5mm, radially 90 ° of four phase place right-hand screw distributes.