CN203515461U - Safe and drill-free blind plate cementing tool - Google Patents

Abstract

The utility model belongs to a petroleum downhole tool, and particularly relates to a safe and drill-free blind plate cementing tool. According to the safe and drill-free blind plate cementing tool, a cement injection sleeve (6) is installed in a main body tube (9) and located by a jaw-type stop block (7); a fishing seat (4) and a bumping sleeve (17) are installed at the left end and the right end in the cement injection sleeve (6) respectively; an elastic slip (8) with unidirectional sawteeth and a compression spring (5) are installed in the fishing seat (4); the right end of the elastic slip (8) is close to a conical surface and closely limited with the inner conical surface of the fishing seat (4); the left end of the elastic slip (8) is closely connected with the right end surface of the compression spring (5); the left end surface of the compression spring (5) is closely pressed on the inner end surface of a cap (3); the cap (3) is in threaded connection to the left end head of the cement injection sleeve (6); the bumping sleeve (17) and the cement injection sleeve (6) are limited by a bumping shear pin (18). The safe and drill-free blind plate cementing tool is time-saving and labour-saving, capable of saving cost and free from damages to the inner walls of the sleeves, thus increasing the cementing efficiency and ensuring the cementing quality.

Description

Safety exempts to bore blind plate cementing tool

Technical field

The utility model belongs to Petroleum Down-hole Tool, and particularly a kind of safety exempts to bore blind plate cementing tool.

Background technology

In reinforcing oil well technique, need with first sleeve pipe being blocked to down-hole under a kind of instrument that is known as blind plate, then by sleeve pipe, to the annular space of sleeve pipe and bore hole, inject cement, finally by completing well cementation for techniques such as ash and well-flushings, after having cemented the well, need to be bored releasing by beam hanger, get through well and realize completion, in the dark down-hole of hundreds of rice, it is very large that the blind plate brill that this metal material is made removes difficulty, waste time and energy, efficiency is low, cost is high, misoperation also easily injures inside pipe wall, jeopardize the safety of oil well, and the hidden danger of bringing, disadvantage is in drilling well, in completion and well cementing process, also day by day reveal.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned technical deficiency, provides a kind of cost-saving, does not injure internal surface of sleeve pipe, can guarantee that the safety of cementing quality exempts to bore blind plate cementing tool.

The technical scheme that the utility model technical solution problem adopts is: safety is exempted to bore blind plate cementing tool and comprised external casing packer, main body tube, nut, Compress Spring, salvage seat, bruising shear pin, fixing shear pin, be characterized in being equipped with note ash cover in main body tube, by dental inlay block, locate, left in note ash cover, right two ends are equipped with respectively and are salvaged seat and bruising cover, salvage in seat elasticity slips and the Compress Spring with unidirectional sawtooth is housed, elasticity slips right-hand member is close to spacing by the conical surface and a salvaging seat internal conical surface, left end and Compress Spring right side are by real, Compress Spring left side is pressed on the inner face of nut, nut is threaded on the left end head of note ash cover, spacing with bruising shear pin between bruising cover and note ash cover.

The beneficial effects of the utility model are: safety is exempted to bore blind plate cementing tool and adopted three layers of nestable structure design of cylinder barrel to be controlled and can be realized packer set by the pressure of well head, open cementing hole, bruising and the function of closing cementing hole, salvage in seat and be equipped with the elasticity slips of unidirectional sawtooth tooth and can realize salvaging function, after having worked, can be lowered to and drag for lance its main body tube is once pulled out and risen to ground with interior workpiece by beam hanger, get through well, realize completion, time saving and energy saving, the cost-saving internal surface of sleeve pipe that also do not injure, improved well cementation efficiency, guaranteed cementing quality.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, with embodiment, illustrate.

Fig. 1 is that safety exempts to bore blind plate cementing tool structure sectional view.

In figure, 1-external casing packer; The logical envelope of the 2-axial water hole of device; 3-nut; 4-salvages seat; 5-Compress Spring; 6-note ash cover; 7-dental inlay block; 8-elasticity slips; 9-main body tube; 10-is communicated with He Zhuhui hole, the axial water hole of packer groove; 11-notes grey hole; 12-notes grey open sliding sleeve; 13-is shear pin fixedly; 14-closes cover; 15-closes cover shear pin; 16-protective sleeve; 17-bruising cover; 18-bruising shear pin.

The specific embodiment

Embodiment, with reference to accompanying drawing 1, the external casing packer 1 that safety exempts to bore blind plate cementing tool is threaded with main body tube 9, and protective sleeve 16 is sleeved on the right-hand member of main body tube 9 spacing every the right side of device 1 with sleeve pipe outward.The grey open sliding sleeve 12 of note is housed respectively between main body tube 9 and protective sleeve 16 and closes cover 14; note on grey open sliding sleeve 12 and establish and be communicated with He Zhuhui hole, the axial water hole of packer groove 10; being communicated with He Zhuhui hole, the axial water hole of packer groove 10 is communicated with the axial water hole 2 of logical packer on external casing packer 1; main body tube 9 and note ash open sliding 12 between with fixedly shear pin 13 is spacing, main body tube 9 and close between overlapping 14 spacing with closing shear pin 15.Note ash cover 6 is housed in main body tube 9, and by dental inlay block 7 location, main body tube 9 and note ash cover 6 are provided with the grey hole 11 of note, and note ash cover 6 interior left and right two ends are equipped with respectively and are salvaged seat 4 and bruising cover 17.Salvage the seat 4 in-built elasticity slips 8 with unidirectional sawtooth and Compress Springs 5, elasticity slips 8 right-hand members are close to spacing by the conical surface and salvaging seat 4 internal conical surfaces, left end and Compress Spring 5 right sides are by real, Compress Spring 5 left sides are pressed on the inner face of nut 3, nut 3 is threaded on the left end of note ash cover 6, spacing with bruising shear pin 18 between bruising cover 17 and note ash cover 6.

The using method that safety exempts to bore blind plate cementing tool is: from safety, exempt to bore well liquid that blind plate cementing tool right-hand member comes in successively by the note ash hole 11 note ash cover 6 and main body tube 9, be communicated with He Zhuhui hole, the axial water hole of packer groove 10, the axial water hole 2 of logical packer enters into external casing packer 1, when pressure is elevated to the pressure that is greater than the opening valve on external casing packer 1, the packing element of external casing packer 1 starts to expand, annular space oil well casing is outer and well head bore hole is separated into upper and lower two parts, pressure continues to raise, when pressure is greater than the shut off valve pressure on external casing packer 1, the packing element of external casing packer 1 is closed, pressure continues to raise, when pressure is greater than the shearing force of the fixedly shear pin 13 on the grey open sliding sleeve 12 of note, fixedly shear pin 13 is cut off, note grey open sliding sleeve 12 slide onto to the right close cover 14 left ends on, now noting grey hole 11 is opened, just can, to the sleeve pipe on external casing packer 1 top and the annular space injected water mud between well head bore hole, when the mud height injecting reaches the height of design, drop into and hang plug, the front end that hangs plug pierces in elasticity slips 8 and interlock mutually with it, fixedly the bruising shear pin 18 of bruising cover 17 is cut off simultaneously, bruising cover 17 moves to left and note ash cover 6 and main body tube 9 are led to the water hole of closing cover 14 opens, and closes cover 14 and moves to left water filling ash hole 11 is closed, when cement paste is solidified to the stipulated time, just can be lowered to Special fishing tool is combined and salvages with the rear end that hangs plug, during salvaging, hanging plug draws salvaging seat 4 right sides by the wedge action of the taper seat of elasticity slips 8 and salvaging seat 4, the narrow shaft shoulder of annular of salvaging on seat 4 is cut off, salvaging seat 4 moves to right, on the inner segment of dental inlay block 7, move up into the groove salvaged on seat 4 separated with main body tube 9, so far note ash cover 6 and pulling out in the lump under the lifting of hanging plug with interior whole workpiece, get through well, complete well cementation.

Claims (1)

1. a safety exempts to bore blind plate cementing tool, comprise external casing packer (1), main body tube (9), nut (3), Compress Spring (5), salvage seat (4), bruising shear pin (18), fixing shear pin (13), it is characterized in that being equipped with note ash cover (6) in main body tube (9), by dental inlay block (7), locate, left in note ash cover (6), right two ends are equipped with respectively and are salvaged seat (4) and bruising cover (17), salvage in seat (4) elasticity slips (8) and the Compress Spring (5) with unidirectional sawtooth is housed, elasticity slips (8) right-hand member is close to spacing by the conical surface and salvaging seat (4) internal conical surface, left end and Compress Spring (5) right side is by real, Compress Spring (5) left side is pressed on the inner face of nut (3), nut (3) is threaded on the left end head of note ash cover (6), spacing with bruising shear pin (18) between bruising cover (17) and note ash cover (6).