CN203515429U

CN203515429U - Novel oilfield fishing device for downhole fallen objects

Info

Publication number: CN203515429U
Application number: CN201320661330.6U
Authority: CN
Inventors: 闫新庆; 闫雷
Original assignee: Dongying City Ground Rui Kesen Petrotechnik Ltd
Current assignee: SHANDONG DIRUIKESEN ENERGY TECHNOLOGY CO., LTD.
Priority date: 2013-10-25
Filing date: 2013-10-25
Publication date: 2014-04-02
Anticipated expiration: 2023-10-25

Abstract

The utility model relates to an oil well fishing device, in particular to a novel oilfield fishing device for downhole fallen objects. According to the technical scheme, the novel oilfield fishing device for downhole fallen objects comprises a connector, a spear, a spring, a round slip, a lock block, a screw, and a guide shoe. The spear is fixed on the connector. The round slip is fixed on the spear through the lock block. Floatation of the round slip can be adjusted through the lock block which is fixed through the screw. The guide shoe is connected to the tail end of the spear. The spring is disposed between the spear and the round slip. The novel oilfield fishing device for downhole fallen objects has the advantages that the structure is simple, the device can operate flexibly and reliably and is simple and easy to operate, operation success rate is high, a fish top is not easily damaged, the area of contact with a fallen fish is large, tensile load is high, resistance to impact load is high, the device is reusable, the fish top can be flushed, and the fallen object can be easily extracted as required after the fallen object is caught.

Description

Novel oilfield trouble of lost tool in hole fishing device

Technical field

The utility model relates to a kind of oil well marine salvage equipment, particularly a kind of novel oilfield trouble of lost tool in hole fishing device.

Background technology

Conventional marine salvage equipment, is probably divided into for salvaging four of deep well bar and grabs fisher at present, salvages the mechnical oscillator of deep-well drilling rod, the novel cutter of cutting tubulose fish, and the flow type fisher that can collect bulk landwaste and metal.In salvaging process, junk can not be salvaged out, cannot exit, and increases workover treatment difficulty, increases maintenance cost.

Summary of the invention

The purpose of this utility model is exactly in view of the foregoing defects the prior art has, and a kind of novel oilfield trouble of lost tool in hole fishing device is provided.

Its technical scheme is: comprise joint, shaft, spring, circle slips, lock dog, screw, guide shoe, shaft is fixed on joint, circle slips being fixed in shaft by lock dog, described lock dog can regulate floating of round slips, described lock dog is fixed by screw, the end of described shaft connects guide shoe, between described shaft and circle slips, is provided with spring.

Above-mentioned round slips is connected by saw-tooth thread with shaft.

The beneficial effects of the utility model are: simple in structure, flexible movements are reliable, easy to operation, job success ratio is high, and not fragile top of fish is large with fish contact area, thereby tension load is high, anti-shock loading is large, capable of circulation, rinse top of fish, catch after junk, be easy to as required exit junk, by using spring at junk internal diameter, like this, even if spring comes off, because the restriction of size is also not easy to fall in well.And while salvaging heavier junk, stressed the stressed of lock dog of having shared of spring, thus application life of slips and lock dog extended, increased the time that weight is salvaged.

Accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present utility model;

In upper figure: joint (1), shaft (2), spring (3), circle slips (4), lock dog (5), screw (6), guide shoe (7).

The specific embodiment

By reference to the accompanying drawings 1, the utility model will be further described:

The utility model comprises joint 1, shaft 2, spring 3, circle slips 4, lock dog 5, screw 6, guide shoe 7, shaft 2 is fixed on joint 1, circle slips 4 being fixed in shaft 2 by lock dog 5, described lock dog 5 can regulate floating of round slips 4, described lock dog 5 is fixing by screw 6, the end of described shaft 2 connects guide shoe 7, between described shaft 2 and circle slips, be provided with spring 3, according to junk internal diameter, we can use spring 3, like this, even if spring comes off, because the restriction of size is also not easy to fall in well.And while salvaging heavier junk, stressed the stressed of lock dog of having shared of spring, thus application life of slips and lock dog extended, increased the time that weight is salvaged.

In addition, justifying slips 4 is connected by saw-tooth thread with shaft 2.

Concrete operation method of the present utility model:

(1), according to the size of fish internal diameter, select the reversible fishing spear adapting with it.

(2) checking tool, makes the axial movement value of circle slips meet technical requirements.With hand, rotate card and make it near discharging ring, now instrument is in free state.

(3) connect drilling tool, down to the above 2m of top of fish left and right, turn on pump circulation is also slowly transferred drilling tool fish finding top.

(4) visit after accurate top of fish, examination is carried salvaging pipe and is leant on and record suspending weight.

(5) formally salvage.When dragging for lance, enter fish chamber, suspending weight has while decline showing, reversion drilling tool 1～2 circle (field experience proof turn several circles also can) shaft produces radial push to circle slips more, forces shaft up, is that round slips blocks fish and drags for and obtain.

(6) on, carry drilling tool, if weight indicator suspending weight increases, prove and drag for and obtain, can pull out of hole, if suspending weight does not increase, can repeat aforesaid operations until drag for and obtain.

(7), while as above lifting power and approach or be greater than drilling tool safe load, under available drilling tool (or bumper sub), hit shaft, and after main story drilling tool 2～3 circles at the upper drilling tool of carrying, instrument can be exited.

Salvage well circle slips external diameter under free state and be slightly larger than junk internal diameter.When instrument enters fish chamber, circle slips is compressed, produces certain outer expansion force, makes circle slips be adjacent to junk inwall.With the up increase gradually with lifting power of shaft, the saw-tooth thread on shaft, circle slips coincide mutually, and circle slips produces radial load, makes it bite fish realization and salvages.Once fish is stuck while exiting, cannot pull out and need exit while dragging for lance, as long as to shaft certain under hit power, just can make the inside and outside saw-tooth thread of circle slips and shaft throw off, then forward drilling tool 2 ~ 3 circles, circle slips and shaft produce relative displacement, impel round slips to move downward along shaft saw-tooth thread, until circle slips contacts with discharging ring upper surface, above carry drilling tool, can exit fish.

Claims

1. a novel oilfield trouble of lost tool in hole fishing device, it is characterized in that: comprise joint (1), shaft (2), spring (3), circle slips (4), lock dog (5), screw (6), guide shoe (7), shaft (2) is fixed on joint (1), circle slips (4) being fixed in shaft (2) by lock dog (5), described lock dog (5) can regulate floating of round slips (4), described lock dog (5) is fixing by screw (6), the end of described shaft (2) connects guide shoe (7), between described shaft (2) and circle slips, be provided with spring (3).

2. novel oilfield trouble of lost tool in hole fishing device according to claim 1, is characterized in that: described round slips (4) is connected by saw-tooth thread with shaft (2).