阅读说明：本技术 一种桥塞适配器 (Bridge plug adapter ) 是由 刘军 李文戈 徐兴权 刘翔 廖如刚 乔闻川 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种桥塞适配器,包括坐封推筒和坐封拉杆组件,所述坐封拉杆组件包括坐封拉杆和与坐封拉杆相连的连接套部件,在连接套部件内设有弹簧爪,在弹簧爪内设有可以被拉断的释放栓,所述释放栓的上端与连接套部件固定相连,下端与弹簧爪固定相连,所述弹簧爪的下端通过支撑杆支撑将其下端部的爪头卡装在桥塞的限位槽内,所述支撑杆通过径向插销与连接套部件相连。本发明结构简单,可靠性高、抗阻力强,能够满足桥塞高速泵送和安全坐封要求,与各种材质的桥塞具有较好的适配性,能够将用于控制桥塞丢手的销钉或释放栓残余部分带出井口,尤其适用全可溶桥塞,减少井筒不溶物,满足后期井筒作业要求。(The invention discloses a bridge plug adapter which comprises a setting push cylinder and a setting pull rod assembly, wherein the setting pull rod assembly comprises a setting pull rod and a connecting sleeve component connected with the setting pull rod, a spring claw is arranged in the connecting sleeve component, a release bolt capable of being broken is arranged in the spring claw, the upper end of the release bolt is fixedly connected with the connecting sleeve component, the lower end of the release bolt is fixedly connected with the spring claw, the lower end of the spring claw is supported by a support rod to clamp a claw head at the lower end of the spring claw in a limiting groove of a bridge plug, and the support rod is connected with the connecting sleeve component through a radial bolt. The invention has simple structure, high reliability and strong resistance, can meet the requirements of high-speed pumping and safe setting of the bridge plug, has better adaptability with the bridge plugs made of various materials, can bring the residual part of the pin or the release bolt for controlling the releasing of the bridge plug out of a well mouth, is particularly suitable for the fully soluble bridge plug, reduces insoluble substances in a shaft and meets the requirements of shaft operation in the later period.)

1. The utility model provides a bridge plug adapter, includes sits and seals a barrel and sits and seal pull rod assembly, sit and seal pull rod assembly locate and sit and seal the barrel and be connected the centre bore of constituteing after with the bridge plug, its characterized in that: the setting push cylinder is connected with the setting pull rod assembly through a starting pin, the setting pull rod assembly comprises a setting pull rod and a connecting sleeve component connected with the setting pull rod, a spring claw is arranged in the connecting sleeve component, a release bolt capable of being broken is arranged in the spring claw, the upper end of the release bolt is fixedly connected with the connecting sleeve component, the lower end of the release bolt is fixedly connected with the spring claw, the lower end of the spring claw is supported through a support rod to clamp a claw head at the lower end of the spring claw in a limiting groove of the bridge plug, the support rod is connected with the connecting sleeve component through a radial bolt, and when the release bolt is broken, the spring claw can axially slide relative to the connecting sleeve component and the support rod.

2. A bridge plug adapter as claimed in claim 1 or 2, wherein: the two ends of the release bolt are provided with connecting threads, the middle of the release bolt is provided with an annular groove, and the required breaking value is set according to the material and the use requirement.

3. A bridge plug adapter as claimed in claim 1 or 2, wherein: the spring claw comprises a cylindrical spring claw body, a plurality of elastic claws are circumferentially arranged at the lower end of the cylindrical spring claw, a cut or a certain gap is reserved between every two adjacent elastic claws, the claw heads of the elastic claws are supported and clamped in a limiting groove of the bridge plug through supporting rods, when the release bolt is broken, the spring claws move downwards, the supporting rods are lost, the elastic claws shrink, and the claw heads slide out from the limiting groove of the bridge plug, so that the bridge plug is released.

4. The bridge plug adapter of claim 3, wherein: axial sliding grooves are symmetrically formed in the cylindrical spring claw body, and the bolt is connected with the supporting rod through the axial sliding grooves.

5. A bridge plug adapter as claimed in claim 1 or 2, wherein: the bolt is fixed at the lower end of the connecting sleeve component through the pressing ring.

6. A bridge plug adapter as claimed in claim 1 or 2, wherein: the upper end of the supporting rod is provided with a through waist-shaped hole for inserting a bolt.

7. The bridge plug adapter of claim 3, wherein: the jaw head is radially outwardly convex relative to the cylindrical spring jaw body.

8. The bridge plug adapter of claim 1, wherein: the connecting sleeve component comprises a plurality of connecting sleeves which are connected in sequence, the connecting sleeve at the uppermost end is connected with the setting pull rod, the connecting sleeve at the middle position is connected with the setting sleeve through a starting pin, a spring claw is arranged in a central hole of the connecting sleeve at the lowermost end, and a radial bolt is arranged at the lower end.

9. The bridge plug adapter of claim 8, wherein: the connecting sleeve component comprises an upper connecting sleeve, a middle connecting sleeve and a lower connecting sleeve which are connected in sequence, and the upper end of the upper connecting sleeve is connected with a pressing cap.

Technical Field

The invention relates to the field of downhole tools for oil and gas field development, in particular to a bridge plug adapter.

Background

In the field of oil and gas development, staged fracturing operation is often required to be carried out at different positions of the oil and gas well stratum to improve the oil and gas yield. The pumping bridge plug and perforation combined operation is an important process for implementing casing staged fracturing, and soluble bridge plugs are commonly used to reduce the cost generated by drilling and grinding the bridge plugs in the later period. The adapter is as the key instrument that bridging plug and cable setting instrument are connected, and the structure is diversified.

Most adapters and bridge plugs are connected by steel or copper pins, release pins, or threads made of soluble magnesium aluminum alloy or polymer composite (e.g., 201920814089.3, 201921601665.2, 20202016989. X) on the body of the bridge plug. When the cable setting tool works, when the setting force provided by the cable setting tool reaches a pin shearing value, a release bolt breaking value or a thread damage value, the adapter is separated from the bridge plug, and the bridge plug is released. After the bridge plug is released, the residual parts of the sheared or broken pin and the release bolt cannot be dissolved in the shaft, and huge hidden dangers are generated for subsequent construction and later measures after a large number of the residual parts are accumulated.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a bridge plug adapter which can avoid arranging a hand-losing control mechanism on a bridge plug body and obviously improve the success rate of bridge plug setting and releasing.

The technical scheme adopted by the invention is as follows: the utility model provides a bridge plug adapter, includes sits and seals a barrel and sits and seal pull rod assembly, sit and seal pull rod assembly locate and sit and seal the barrel and be connected the centre bore of constituteing after with the bridge plug, its characterized in that: the setting push cylinder is connected with the setting pull rod assembly through a starting pin, the setting pull rod assembly comprises a setting pull rod and a connecting sleeve component connected with the setting pull rod, a spring claw is arranged in the connecting sleeve component, a release bolt capable of being broken is arranged in the spring claw, the upper end of the release bolt is fixedly connected with the connecting sleeve component, the lower end of the release bolt is fixedly connected with the spring claw, the lower end of the spring claw is supported through a support rod to clamp a claw head at the lower end of the spring claw in a limiting groove of the bridge plug, the support rod is connected with the connecting sleeve component through a radial bolt, and when the release bolt is broken, the spring claw can axially slide relative to the connecting sleeve component and the support rod.

According to the technical scheme, the two ends of the release bolt are provided with the connecting threads, the middle of the release bolt is provided with the annular groove, and the required breaking value is set according to the material and the use requirement.

According to the technical scheme, the spring claw comprises a cylindrical spring claw body, a plurality of elastic claws are circumferentially arranged at the lower end of the cylindrical spring claw, a slit is reserved between adjacent elastic claws or a certain gap is reserved between adjacent elastic claws, the claw heads of the elastic claws are supported and clamped in the limiting groove of the bridge plug through the supporting rod, when the release bolt is broken, the spring claw moves downwards, the supporting of the supporting rod is lost, the elastic claws shrink, and the claw heads slide out from the limiting groove of the bridge plug, so that the bridge plug is released.

According to the technical scheme, the cylindrical spring claw body is symmetrically provided with the axial sliding grooves, and the bolt is connected with the supporting rod through the axial sliding grooves.

According to the technical scheme, the bolt is fixed at the lower end of the connecting sleeve component through the compression ring.

According to the technical scheme, the upper end of the supporting rod is provided with a through waist-shaped hole for inserting a bolt.

According to the technical scheme, the claw head protrudes outwards and radially relative to the cylindrical spring claw body.

According to the technical scheme, the connecting sleeve component comprises a plurality of connecting sleeves which are sequentially connected, the connecting sleeve at the uppermost end is connected with the setting pull rod, the connecting sleeve at the middle position is connected with the setting sleeve through the starting pin, the spring claw is arranged in the central hole of the connecting sleeve at the lowermost end, and the radial bolt is arranged at the lower end of the connecting sleeve.

According to the technical scheme, the connecting sleeve component comprises an upper connecting sleeve, a middle connecting sleeve and a lower connecting sleeve which are sequentially connected, and the upper end of the upper connecting sleeve is connected with a pressing cap.

The beneficial effects obtained by the invention are as follows:

1. the invention has simple structure, high reliability and strong resistance, can meet the requirements of high-speed pumping and safe setting of the bridge plug, has better adaptability with the bridge plugs made of various materials, particularly the bridge plug made of soluble materials with lower body hardness, can bring the residual part of a pin or a release bolt for controlling the releasing of the bridge plug out of a well mouth, is particularly suitable for the fully soluble bridge plug, reduces insoluble substances in a shaft, and meets the requirements of later shaft operation.

2. The structure of the invention avoids the mode of directly installing the releasing pin on the bridge plug body, and improves the accuracy and the safety of setting and releasing of the fully-soluble bridge plug.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic view of the present invention in connection with a bridge plug.

FIG. 3 is a schematic illustration of the invention separated from a bridge plug.

Wherein: 1. the device comprises a setting push cylinder, 2 a setting pull rod, 3 an upper connecting sleeve, 4 a pressing cap, 5 a middle connecting sleeve, 6 a release bolt, 7 a starting pin, 8 an adjusting ring, 9 a lower connecting sleeve, 10 a pressing ring, 11 a plug pin, 12 a spring claw, 13 a support rod, 14 and a bridge plug.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1-3, the present embodiment provides an adapter for a bridge plug, which includes a setting push cylinder 1 and a setting pull rod assembly connected to a setting tool, the setting pull rod assembly is disposed in a central hole formed by connecting the setting push cylinder and a bridge plug 14, the setting push cylinder 1 is connected to the setting pull rod assembly through a start pin 7, the setting pull rod assembly includes a setting pull rod and a connecting sleeve member connected to the setting pull rod, a spring claw 12 is disposed in the connecting sleeve member, a release bolt 6 capable of being broken is disposed in the spring claw 12, an upper end of the release bolt 6 is fixedly connected to the connecting sleeve member, a lower end of the release bolt is fixedly connected to the spring claw, a lower end of the spring claw 12 is supported by a support rod 13 to clamp a claw head at a lower end portion in a limit groove of the bridge plug 14, an upper end of the support rod 13 is designed with a through waist-shaped hole, and is connected to the connecting sleeve member through a radial bolt 11, when the release bolt 6 is snapped, the spring catch 12 can slide axially relative to the connecting sleeve part and the support rod 13 (i.e. the spring catch can slide in the lower connecting sleeve, and the support rod can slide in the spring catch).

In this embodiment, the connecting sleeve component includes an upper connecting sleeve 3, a middle connecting sleeve 5, and a lower connecting sleeve 9, which are connected in sequence. The setting push cylinder 1 is sleeved on the middle connecting sleeve 5, starting pins 7 are uniformly arranged on the periphery of the setting push cylinder, and the setting push cylinder is fixed on the middle connecting sleeve 5. The pressing cap 4 fixes the upper connecting sleeve 3 and is connected with the middle connecting sleeve 5. A spring claw is arranged in the center hole of the lower connecting sleeve 9, and a radial bolt 11 is arranged at the lower end part. The setting pull rod 2 is sequentially connected with the upper connector 3, the release bolt 6 and the spring claw 12 through threads. The bolt 11 is fixed at the lower end of the lower connecting sleeve through a pressing ring 10.

In this embodiment, the release bolt 6 is provided with external connection threads at two ends thereof, and is connected with the upper connection sleeve and the spring claw through the external connection threads, and an annular groove is provided in the middle thereof. The release bolt 6 is made of special materials, and the required breaking value is set according to the materials and the use requirements.

In this embodiment, the spring claw 12 includes a cylindrical spring claw body, axial sliding grooves are symmetrically formed in the cylindrical spring claw body, and the plug pin is connected to the support rod through the axial sliding grooves. The lower end of the cylindrical spring claw is circumferentially provided with a plurality of elastic claws, adjacent elastic claws are provided with slots or certain gaps, and the end part of each elastic claw is provided with a claw head which protrudes outwards and radially relative to the cylindrical spring claw body. The claw head of the elastic claw is supported and clamped in a limiting groove of the bridge plug through the supporting rod, when the release bolt is broken, the elastic claw moves downwards to lose the support of the supporting rod, the elastic claw contracts, and the claw head slides out of the limiting groove of the bridge plug, so that the bridge plug is released.

The construction steps are as follows:

before running downhole, the adapter is assembled with the bridge plug as shown in FIG. 2.

After the tool is strung into the well, liquid is continuously pumped and injected through a wellhead to push or is conveyed to a designed position through an oil pipe. And after the designed position is reached, starting a setting tool to set the bridge plug.

In the bridge plug setting process, the setting push cylinder 1 pushes the bridge plug to move downwards to cut the starting pin 7; the setting pull rod 2 drives the bridge plug to move upwards through the upper connecting sleeve 3, the release bolt 6 and the spring claw 12, and the formed vertical bidirectional acting force compresses the bridge plug to set.

When the bridge plug is released, when the setting force reaches the designed value, the release bolt 6 is pulled apart (as shown in 6-1 and 6-2 in fig. 3), the spring claw 12 which is not fixed by the release bolt 6 moves downwards to lose the supporting function of the supporting rod 13, and the claw head at the front end of the spring claw 12 slides out of the bridge plug, so that the bridge plug is released.

During the process of lifting the tool string from the well bore, the setting tool brings out the spring claw 12, the support rod 13 and other components through the setting pull rod 2, the upper connecting sleeve 3, the press cap 4, the middle connecting sleeve 5, the lower connecting sleeve 9 and the plug pin 11.

The invention has simple structure, high reliability and strong resistance, can meet the requirements of high-speed pumping and safe setting of the bridge plug, has better adaptability with the bridge plugs made of various materials, can bring the residual part of the pin or the release bolt for controlling the releasing of the bridge plug out of a well mouth, is particularly suitable for the fully soluble bridge plug, reduces insoluble substances in a shaft and meets the requirements of shaft operation in the later period.