CN201321827Y

CN201321827Y - Anti-sticking hydraulic anchor capable of continuous operation

Info

Publication number: CN201321827Y
Application number: CNU200820228245XU
Authority: CN
Inventors: 张承武; 王兴建; 任雁鹏; 李勇
Original assignee: Engineering Technology Research Institute of CNPC Chuanqing Drilling Engineering Co ltd
Current assignee: Engineering Technology Research Institute of CNPC Chuanqing Drilling Engineering Co ltd
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2009-10-07
Anticipated expiration: 2018-12-15

Abstract

The utility model relates to an anti-sticking hydraulic anchor capable of continuous operation in the tool field of downhole operation in the oil-gas field, which comprises a top joint (1), an upper core pipe (2), a lower core pipe (7), a spring (6), a taper cylinder (8), a fluke (9) and a base joint (10), and is characterized in that the taper cylinder (8) and the fluke (9) are a T-shaped slot embedding structure; the top joint (1) is connected with an outer hook (4); the taper cylinder (8) is connected with an inner hook (5); the upper core pipe (2) is connected with a clamp (3); and the lower core pipe (7) is provided with a liquid inlet with a liquid inlet slot structure. The utility model has simple structure, sand prevention of the liquid inlet hole of the piston chamber, forcible releasing, timely resetting, repetitive operation, and smaller tool diameter, and can be applied for slim-hole operation.

Description

The anti-sticking hydraulic anchor of can working continuously

Technical field

The utility model relates to the oil-gas field downhole operation field of tool, the anti-sticking hydraulic anchor of particularly can working continuously.

Background technology

The hydraulic anchor of conventional structure is by the hydraulic drive anchor fluke, and anchor fluke is stung on internal surface of sleeve pipe, prevents the tubing string displacement, realizes the grappling effect.Lay down hydraulic pressure, anchor fluke is regained under the spring force effect, thereby removes grappling.In case anchor fluke is stuck by sand or impurity, the limited elastic force of spring is not enough to unfreezing, will cause lock of tool drilling.Moreover if in the anchor fluke seat hole long-pending sand is arranged, anchor fluke can not be regained fully.The anti-sticking hydraulic anchor of known technology, adopt the dovetail embedded structure between cone and the anchor fluke, realize the interlock of cone and anchor fluke, when when oil pipe is suppressed, pressure enters plunger shaft from the center pore of hydraulic anchor, (downlink or uplink is for vertical working position to promote descent of piston, should claim right lateral or left lateral for the horizontal operation position, but common working position all is vertical, thus the unified downlink or uplink that is called, below herewith), piston promotes cone in the compression spring, cone to radially releasing, is stung anchor fluke in internal surface of sleeve pipe, reaches the purpose of anchoring string.After the oil pipe release, spring promotes piston and cone sets back, and the anchor fluke of cone drive is simultaneously radially withdrawn, thereby removes grappling.If anchor fluke is regained difficulty, it is spacing that upper lifting pipe post, cylinder sleeve are stuck in the anchor fluke of internal surface of sleeve pipe, and gate ring is cut off shear pin on the cylinder sleeve and continued uply, and central tube drives cone regains anchor fluke by force, has reached the purpose of forcing unfreezing.

The anti-sticking hydraulic anchor of known technology has following some deficiency:

1, the sharp limit of dovetail structure has soft then easy crimping, the hard defective that then easily collapses piece.

(the upper lifting pipe post is transferred tubing string boring down pulling out of hole) stops suddenly if carry suddenly when 2, making a trip, and the shear pin on the cylinder sleeve can be cut off by accident.

3, force to cut off shear pin when disanchoring, want to carry out the operation of follow-up interval, need trip out instrument, reinstall shear pin, go into the well again, be not suitable for working continuously.

4, inlet opening sand control not, easily long-pending sand in the plunger shaft, thus cause losing efficacy.

At above-mentioned technical background, developed a kind of anti-sticking hydraulic anchor of working continuously.

Summary of the invention

The objective of the invention is not sand control, the not problem of anti-sticking and the problem that can not work continuously of existing anti-sticking hydraulic anchor, provide a kind of anti-sticking hydraulic anchor of working continuously, to overcome the deficiency that existing hydraulic anchor exists at above-mentioned conventional hydraulic anchor.

Technical scheme of the present invention is, design a kind of anti-sticking hydraulic anchor of working continuously, it comprises top connection, upward core pipe, core pipe, spring, awl tube, anchor fluke and lower contact down, it is characterized in that: the awl tube is the T-slot linkage structure with anchor fluke, top connection is connected to outer hook, the awl socket joint has interior hook, and last core pipe has beam ring, and the inlet of feed liquor crack structure is arranged on the following core pipe.

Described core pipe and the play core pipe gone up is by the formation central tube that is threaded, and an end of central tube is connected by spline with top connection, the other end be with successively bore tin and anchor fluke and with lower contact by being threaded; Top connection is threaded with outer hook, and the awl tube is threaded with interior hook; Between top connection and the interior hook beam ring that is connected with last core gas thread is arranged; Be with spring between following core pipe and the interior hook.

The beneficial effects of the utility model are: it has simple in structure, plunger shaft inlet opening sand control, force unfreezing, reset immediately so that repeat advantage such as operation, and tool diameter is less, can be fit to the slim-hole operation.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of embodiment;

Fig. 2 is the structural representation that embodiment is used for the fracturing work anchoring string;

Fig. 3 is an awl tube T-slot structural representation;

Fig. 4 is that the A-A of Fig. 1 analyses and observe partial schematic diagram.

Among the figure: 1, top connection; 2, go up the core pipe; 3, beam ring; 4, outer hook; 5, interior hook; 6, spring; 7, following core pipe; 8, awl tube; 9, anchor fluke; 10, lower contact; 11, sealing ring; 12, sleeve pipe; 13, tubing string; 14, hydraulic anchor.

The specific embodiment

Embodiment 1 as shown in Figure 1, the anti-sticking hydraulic anchor of can working continuously comprises top connection 1, upward core pipe 2, core pipe 7, spring 6, awl tube 8, anchor fluke 9 and lower contact 10 down, awl tube 8 is T shape interlock groove embedded structure with anchor fluke 9, top connection 1 is connected to outer hook 4, hook 5 in awl tube 8 is connected to, last core pipe 2 has beam ring 3, the inlet of the feed liquor crack structure of wired cutting on the following core pipe 7.The structure of other parts, annexation and known basic identical.

Embodiment 2 as shown in Figure 1, it by top connection 1, go up core pipe 2, beam ring 3, outer hook 4, interior hook 5, core pipe 7, spring 6, awl tube 8, anchor fluke 9 and lower contact 10 are formed down; Last core pipe 2 and play core pipe 7 be by being threaded togather the formation central tube, and the two ends of a central tube wherein end have been connected by spline with top connection 1 and lead and the transfer torque effect, the other end be with successively bore tins 8 and anchor fluke 9 and with lower contact 10 by being threaded; Top connection 1 is threaded with outer hook 4, and awl tube 8 is threaded with interior hook 5, between top connection 1 and the interior hook 5 beam ring 3 that is threaded with last core pipe 2 is arranged; Be with spring 6 between following core pipe 7 and the interior hook 5; The inlet of the feed liquor crack structure of many feed liquor seams of wired cutting 0.4mm on the following core pipe 7; Following core pipe 7 all has sealing ring 11 with awl tube 8 and lower contact 10 junctions, is drawn in by beam ring 3 under the effect of spring 6 with interior hook 5, does not interfere the axially-movable of outer hook 4.Last core pipe 2 and following core pipe 7 be by the formed central tube that is threaded, the fluid passage when having constituted pressure break; Central tube and awl tube 8 have constituted piston, and liquid enters plunger shaft by the feed liquor seam on the following core pipe 7; The feed liquor seam stops sand to enter plunger shaft, has reached the purpose of sand control; Anchor fluke 9 is all realized interlock as shown in Figure 3 and Figure 4 by T-slot with awl tube 8 and lower contact 10, and T-slot has better sharp limit intensity and frictional behavior than dovetail groove; When oil pipe is suppressed, the fluid power of plunger shaft promote awl in the 8 descending whiles of tube hook 5 break away from beam rings 3, awl tube 8 wedging anchor flukes 9 inboards are radially released anchor fluke 9, make anchor fluke 9 sleeve pipe 13 inwalls of nipping, the purpose that reaches grappling pipe box 13 as shown in Figure 2; When the oil pipe release, awl tube 8 is up under the effect of spring 6, radially regains anchor fluke 9, and grappling is disengaged; When removing grappling,, then transfer tubing string 12 if anchor fluke 9 is blocked and can not regain, the outer hook 4 that top connection 1 this moment connects and awl tube 8 interior hooks that are connected 5 are descending, and the upper lifting pipe post 12 again to hanging, and hook 5 drives an awl Final 8 and is about to anchor fluke 9 withdrawals in making, realize forcing to disanchor function, reached the purpose of anti-sticking; Last core pipe 2 is equipped with beam ring 3, and after disanchor (disanchor and promptly remove grappling), under the effect of beam ring 3, interior hook 5 is thrown off outer hook 4, and gathering is in beam ring 3, and hydraulic anchor 14 returns to reset condition, so that task has again been realized the function of working continuously.This embodiment is a most preferred embodiment.

Claims

1, the anti-sticking hydraulic anchor of can working continuously, it comprises top connection (1), upward core pipe (2), core pipe (7), spring (6), awl tube (8), anchor fluke (9) and lower contact (10) down, it is characterized in that: awl tube (8) is the T-slot embedded structure with anchor fluke (9), top connection (1) is connected to outer hook (4), awl tube (8) is connected to interior hook (5), last core pipe (2) is connected to beam ring (3), and the inlet of feed liquor crack structure is arranged on the following core pipe (7).

2, the anti-sticking hydraulic anchor of working continuously according to claim 1, it is characterized in that: described upward core pipe (1) and following core pipe (7) are by the formation central tube that is threaded, one end of central tube is connected by spline with top connection (1), the other end is with awl tube (8) and an anchor fluke (9) successively, and with lower contact (10) by being threaded; Top connection (1) is threaded with outer hook (4), and awl tube (8) is threaded with interior hook (5); Between top connection (1) and the interior hook (5) beam ring (3) that is threaded with last core pipe (2) is arranged; Be with spring (6) between following core pipe (7) and the interior hook (5).