CN2721861Y - Reversible bulldog spear for declined well - Google Patents

Abstract

The utility model relates to a reversible slips spear for the high angle well in the petroleum engineering, comprising a shear rod 2 and a blocking nail 1. The upper part of the shear rod 2 is additionally provided with the blocking nail 1. The utility model effectively solves the specific problems existing in the salvaging construction of the high angle well segment, avoiding the lacks existing in common reversible slips spears and improving the salvaging success rate of column jacket fishing in the high angle well segment.

Description

High angle hole reversible slips fishing spear

Technical field

The utility model belongs to a kind of fishing tool in the petroleum works, specifically, is high angle hole reversible slips fishing spear.

Background technology

(1) to be used for the fishing string fish in straight well or little gradient well (hole deviation＜60 °) be a kind of very ripe tool and method to Chang Gui reversible slips fishing spear, but in high angle hole (hole deviation 〉=60 °, contain horizontal well) use this instrument, tend to bring the problem that operation easier is big, the appearance vacation shows, the ground judgement is slipped up easily, fishing success ratio is low.

(2) need to press down reverse turn operation behind the reversible slips fishing spear of the routine contact top of fish, and the reaction torque when the high angle hole section is rotated owing to fishing string is bigger, cause the counter-rotating number of turns bad assurance (the easy generation dropout accident of having changeed many is changeed to have lacked and slips can occur and moved on not and can't sting tight fish inwall and cause salvaging failure).

Summary of the invention

Be to provide a kind of high angle hole section that solved to salvage the particular problem that exists in the construction order of the present utility model, avoid the deficiency of conventional reversible slips fishing spear existence, improved the high angle hole reversible slips fishing spear of the fishing success ratio of high angle hole section tubing string fish.

The utility model is achieved in that and comprises fishing spear lance bar 2, retaining nail 1, adds retaining nail 1 on the top of fishing spear lance bar 2.

Advantage of the present utility model is: efficiently solve the high angle hole section and salvage the particular problem that exists in the construction, the deficiency of having avoided conventional reversible slips fishing spear to exist has improved the fishing success ratio of high angle hole section tubing string fish.

" reversible slips fishing spear is equipped with 86 millimeters slips fuses of φ, salvages 5871.89 meters of well depths, 71.5 ° of corresponding hole deviations; " sand control pipe is success once to salvage 4 with 41/2, fish always is about 130 meters, produce favorable economic benefit and only need install 1 retaining nail (shown in the icon 1) on the top of fishing spear lance bar (mandrel) additional, limiting slips moves down along slope of thread is left-handed, promptly the desired site of slips by design in advance positioned on the lance bar), and then the situation of the fishing string that need reverse when having avoided salvaging operation, make salvage easy and reliable.

Description of drawings

Accompanying drawing is a structural representation of the present utility model.

Concrete enforcement

As shown in the figure, install 1 retaining nail additional on reversible fishing spear lance bar (mandrel) top of routine, define the motion of slips, promptly carry out pre-aligned in the position of lance bar slips, and then the situation of having avoided salvaging action need counter-rotating fishing string, make salvaging easy to be reliable.

This patent is applicable to the oil gas water well generation tubing string accident that falls of breaking, top of fish is positioned at the high angle hole section and well depth surpasses 4000 meters fishing, for the salvaging of high angle hole tubing string fish provides suitable fishing tool and technical support, application prospect is better in the engineering industry of oil gas field down-hole.

Claims (1)

1, high angle hole comprises fishing spear lance bar (2), retaining nail (1) with reversible slips fishing spear, it is characterized in that: add retaining nail (1) on the top of fishing spear lance bar (2).