CN2064821U

CN2064821U - Long fluke hydraulic anchor

Info

Publication number: CN2064821U
Application number: CN 90202397
Authority: CN
Inventors: 衣铁鑫; 陈显一
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-03
Filing date: 1990-03-03
Publication date: 1990-10-31

Abstract

The utility model relates to a long fluke hydraulic anchor, which is a special tool for anchoring a construction pipe column in a prepare position of a sleeve pipe in the construction operations such as fracturing, sand-blast perforation and high pressure acid spraying of oil wells and water wells. The utility model is mainly characterized in that a single circular fluke can be changed into an entire long bar-shaped fluke, the contact area is enlarged, an anchoring force is added, and the utility model can overcome the disadvantages of slipping, chattering, sleeve pipe damage and pipe column breaking of the hydraulic anchor. In order to get the prospective yield increasing effect, the utility model can stabilize the pipe column and construct as the design.

Description

Long fluke hydraulic anchor

Hydraulic anchor be oilfield, well when volume increase construction operations such as pressure break, sandblast, perforation, high pressure spray acid, operating tool string is anchored on the special tool of the accurate position of sleeve pipe.

The present hydraulic anchor that uses, anchor fluke is a single garden shape, and its form of structure has two kinds: a kind of is along anchor body circumferencial direction trisection, and two gardens pawl is vertically arranged on each five equilibrium; Another kind is to divide two five equilibriums staggered along anchor body garden Zhou Fangxiang, and its wiper block is transversely arranged.

More than two kinds of hydraulic anchors, although it is different on spread pattern, and in actual job, all little because of garden shape pawl contact area, the fluctuating load ability that it bears is corresponding also little, thereby the anchorage force deficiency, causes the relative slippage with tube wall of anchor fluke, tubing string produces chatter, anchor fluke wearing and tearing, badly damaged down-hole casing during construction, or causes the disconnected major accident such as take off of down-hole string.

In order to overcome above-mentioned shortcoming, improve the long anchor fluke hydraulic anchor of design, change single garden shape anchor fluke into monolithic strip anchor fluke structure, thereby increased fluke area, under the identical situation of construction operation condition, because the increase of fluke area, then anchorage force will increase along with the increase of anchor fluke and sleeve pipe contact area, because the increase of anchorage force, in construction operation, just overcome slippage, impacted, trembled, the disconnected unstable disadvantage of operation such as take off of anchor fluke wearing and tearing, tubing string.

Hydraulic anchor is made up of parts such as trip bolt 1, lock tube 2, anchor body 3, wiper block 4, spring 5 and anchor flukes 6.

Anchor body 3 is main bodys of hydraulic anchor, and when the underground work anchor station, pressure is from anchor body centre bore directive anchor fluke, with anchor fluke extrapolated rise on the internal surface of sleeve pipe, hydraulic anchor is anchored on the casing wall firmly.

Lock tube 2 is fixed on the anchor body 3 with trip bolt 1, and guarantees to be able to freely-movable when operation after parts such as anchor fluke 6, spring 5, wiper block 4 are assembled sequentially.

Wiper block 4 is outwards to move when rising in tube wall at the anchor fluke pressurized, and it is subjected to the pressure effect of anchor fluke upper spring, makes the anchor fluke return behind the anchorage force removal, promptly by spring 5 with the anchor fluke pop into position, can take out hydraulic anchor by the down-hole.

Anchor fluke 6 is key points of this utility model, its principal character is to change single garden shape anchor fluke into whole strip structure, its movement locus does not become, but the compression area of anchor fluke increases in practicality, the contact area of anchor fluke and tube wall increases thereupon, thereby anchorage force increases, and overcomes the shortcoming of single garden shape anchor fluke hydraulic anchor.

In stimulation work constructions such as pressure break, sandblast, perforation and high pressure spray acid, must eliminate slippage, tremble, disconnectedly take off, damage factor such as sleeve pipe,, construction technology is normally carried out with the stability of assurance operating tool string in the down-hole, reach designing requirement, finish effect of increasing production.

This utility model and original hydraulic anchor contrast following advantage:

Original two kinds of single garden pawl hydraulic anchors, because of contact area is little, job insecurity, it is bigger to be hit, to tremble, damage sleeve pipe and anchor fluke easily, the utility model changes original single garden pawl hydraulic anchor into whole strip anchor fluke hydraulic anchor, increase contact area, increase anchorage force, overcome above-mentioned shortcoming.

The utility model and original two kinds of hydraulic anchors are relatively

The anchor fluke kind	Fluke area cm ²	Percentage %	Area increases %
				Three fens garden pawls	63.3	100	0
Six fens garden pawls	94.95	150	50
				The strip pawl	120.00	189.6	89.6

Long anchor fluke hydraulic anchor description of drawings:

Fig. 1 is long anchor fluke hydraulic anchor structure chart.

1 dog screw, 2 guidees, 3 anchor bodies, 4 wiper blocks, 5 springs, 6 anchor flukes, 7 sealed packings.

Fig. 2 is the A-A sectional drawing.

The hydraulic anchor that the utility model is processed into by accompanying drawing 1, its processing technology is bigger than single garden pawl hydraulic anchor difficulty, and cost is high slightly, but result of use is good, and well received.

Claims

1, a kind of long anchor fluke hydraulic anchor is made up of parts such as anchor body, lock tube, wiper block, sealed packing, spring, screw and anchor flukes, it is characterized in that changing single garden shape anchor fluke into monolithic strip anchor fluke.