CN207829838U - A kind of releasable formula slips fisher - Google Patents

Abstract

The utility model provides a kind of releasable formula slips fisher, rotary motion need not be imposed to slips fisher in fishing operation and releasably exits oil well fish, including sequentially connected top connection from top to bottom, cylinder and salvaging bowl, it is disposed with upper spring from top to bottom in the inner barrel, slips, lower spring, slips baffle ring and cone baffle ring, the big spring is arranged between top connection and slips, the little spring is arranged between slips and slips baffle ring, the slips baffle ring is fixed on cylinder, the outside of the slip insert conical surface in a ring, it is formed and is fitted close with the interior annular conical surface of the cone baffle ring, the cone baffle ring is fixed on by shear screw on the cylinder；The characteristics of releasable formula slips fisher has moving back property of fish good, release stability, applies in the production field of oil field, can widen the application field of slips fisher, while can significantly improve the safety and reliability salvaged to downhole instrument string.

Description

A kind of releasable formula slips fisher

Technical field

The utility model is related to a kind of slips fishers, more particularly to are a kind of releasable formula slips fishers.

Background technology

Sucker-rod fishing tool is that have hole junk to tubuloses such as oil pipe, drilling rod, milling pipe, packer, injection well downhole flow regulator, production mandrels The specific purpose tool salvaged, the existing sucker-rod fishing tool used mainly have two major classes：One kind is three ball fishers, another Kind is slips fisher.In the fishing of oil well fish, obstacle is encountered or due to technological requirement etc. sometimes due to salvaging Reason needs to stop salvaging, and fish is exited in release.On release exit function, although three ball fishers also have releasable form Structure, but since it salvages the defect of mode, fish release pull that value is not accurate enough to be often resulted in release and be not sufficiently stable, sometimes Larger damage can be also generated to underground fish, especially when salvaging instrument；And slips fisher has well due to it The stability of moving back property of fish, fish release is also very high, therefore is a kind of relatively broad releasable formula used in current oil field Slips fishing tool.But it since this releasable formula slips fisher is when fish operation is exited in release, needs to rotate forward Sucker rod and drilling tool, by dynamic sucker rod, drilling tool and instrument string rotation and above carry, gradually drive slips fisher by underground Fish release is exited, thus in the application of this releasable formula slips fisher, it is desirable that cannot include in borehole instruments string Rotating short-knot, if being connected with rotating short-knot, the rotation of sucker rod and drilling tool can not just drive slips fisher to rotate, also It can not discharge and exit fish.It can be seen that the releasable formula slips fisher applied at present still has functional limitation, exploitation It is not required to rotation and the releasable formula slips fisher of fish release exit function can be realized be need further developmental research one A project.

Utility model content

The utility model provides a kind of releasable formula slips fisher, need not be applied to slips fisher in fishing operation Oil well fish is releasably exited with rotary motion.

A kind of releasable formula slips fisher, including sequentially connected top connection 1 from top to bottom, cylinder 2 and salvaging bowl 8, It is disposed with upper spring 3, slips 4, lower spring 5, slips baffle ring 6 and cone baffle ring 7 from top to bottom inside the cylinder 2； The upper spring 3 imposes active force, the lower spring 5 between the lower face of the top connection 1 and the upper surface of the slips 4 Active force is imposed between the lower end edge and the upper surface of the slips baffle ring 6 of the slips 4；The slips baffle ring 6 is fixed on On the cylinder 2, the slips 4 is limited；Several cut-off slots 10 are vertically provided on the slips 4, by lower part slips Tooth 40 is divided into several valve bodies, and the quantity of the slip insert valve body is preferably 4~8, and the medial surface of the slip insert 40 is If tooth face structure dentulous, the outside conical surface in a ring, the interior annular cone-shaped of the circular cone and the cone baffle ring 7 At tight fit；The cone baffle ring 7 is fixed on by shear screw 9 on the cylinder 2, is limited to the slips 4.

The utility model has the beneficial effects that providing a kind of releasable formula slips fisher, realize in fishing operation not It needs to impose the function that oil well fish is releasably exited in rotary motion, the releasable formula slips fisher to slips fisher It is good with moving back property of fish, discharge stability the characteristics of, apply in oilfield salvage operation, in by instrument string whether with rotation The application field of slips fisher has been widened in the limitation for turning pipe nipple, while can significantly improve the peace salvaged to downhole instrument string Full property and reliability, reduce the generation of rejuvenation of oil field accident, improve production efficiency of oilfields.

Description of the drawings

The construction schematic diagram of the releasable formula slips fisher of Fig. 1, the utility model.

Specific implementation mode

The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

A kind of releasable formula slips fisher, as shown in Figure 1, including sequentially connected top connection 1 from top to bottom, cylinder 2 With salvaging bowl 8, it is disposed with upper spring 3, slips 4, lower spring 5,6 and of slips baffle ring from top to bottom inside the cylinder 2 Cone baffle ring 7.

In carrying out oil well fish fishing operation, the salvaging bowl 8 imports fish in the cylinder 2, is kept off into cone The active force that the slips 4 overcomes upper spring 3 is pushed to move up in ring 7, since the slip insert 40 of 4 end of the slips is point The valve body structure cut, under the action of fish, with moving up for the slips 4, the slip insert 40 also generates diameter simultaneously To expanding displacement, to keep the 40 exterior annular conical surface of the slip insert and the interior annular conical surface of the cone baffle ring 7 close Cooperation, enables fish to enter sufficiently into the slip insert 40, and when fish, which reaches, salvages position, stopping moves down and gradually The releasable formula slips fisher is promoted, the active force of the upper spring described at this time 3 is bored by 6 interior annular of slips baffle ring The effect in face is converted into being directed radially towards the convergent force in the center of circle, clamps fish by the slip insert 40, is lifted with sucker rod Rise.

When fishing operation encounters obstacle or due to technological requirement etc., need to stop salvaging, when fish is exited in release, Certain shearing force is imposed to sucker rod, cuts the shear screw 9 of the fixed cone baffle ring 7, at this point, the cone is kept off The limitation that 7 rings are detached from the shear screw 9 hurtles down to the bottom of the cylinder 2, still, by 5 elastic force of lower spring Restriction and restriction effect, the falling speed of the slips 4 is retarded rapidly, and the slips 4 cannot be with the centrum 2 bottom of the cylinder is fallen under baffle ring 7, but is separated in position with the cone baffle ring 7, at this time with effect In the disappearance of the radial contracting forces on the slip insert 40, fish, which is released, exits the releasable formula slips fisher, is falling When fish is detached from the slips 4, moment can effectively be delayed the huge reaction force that the slips 4 generates by the upper spring 3 Solution and limitation, because without integrally generating unfavorable vibrations and impact to the releasable formula slips fisher.

In summary it describes, the releasable formula slips fisher is when fish is exited in release, due to 3 He of upper spring The serial action of lower spring 5 will not integrally generate the releasable formula slips fisher unfavorable vibrations and impact, and work shape State is stable, safety, in use will not in drilling tool and instrument string instrument or equipment have an impact, damage.

Claims (3)

1. a kind of releasable formula slips fisher, including sequentially connected top connection from top to bottom（1）, cylinder（2）With salvaging bowl （8）, it is characterised in that：In the cylinder（2）Inside is disposed with spring from top to bottom（3）, slips（4）, lower spring （5）, slips baffle ring（6）With cone baffle ring（7）；The upper spring（3）In the top connection（1）Lower face and the slips （4）Upper surface between impose active force, the lower spring（5）In the slips（4）Lower end edge and the slips baffle ring（6） Upper surface between impose active force；The slips baffle ring（6）It is fixed on the cylinder（2）On；The slips（4）On vertically open There are several cut-off slots（10）, by lower part slip insert（40）Several valve bodies are divided into, the conical surface, the annular are bored in a ring in outside Face and the cone baffle ring（7）The interior annular conical surface formed be fitted close；The cone baffle ring（7）Pass through shear screw（9） It is fixed on the cylinder（2）On.

2. a kind of releasable formula slips fisher as described in claim 1, it is characterised in that：The slip insert（40）Valve body Quantity is 4~8.

3. a kind of releasable formula slips fisher as described in claim 1 or 2, it is characterised in that：The slip insert（40） Medial surface be set tooth face structure dentulous.