CN206071515U

CN206071515U - A kind of sub-salt well down-hole HDPE well casing fishing devices

Info

Publication number: CN206071515U
Application number: CN201621124621.1U
Authority: CN
Inventors: 李小杰; 臧建宁; 叶成明; 王营超; 冯建月; 孙向华; 关晓琳
Original assignee: Center for Hydrogeology and Environmental Geology CGS
Current assignee: Center for Hydrogeology and Environmental Geology CGS
Priority date: 2016-10-14
Filing date: 2016-10-14
Publication date: 2017-04-05
Anticipated expiration: 2026-10-14

Abstract

The utility model discloses a kind of sub-salt well down-hole HDPE well casing fishing devices, fishing device is combined by drilling rod and fisher and is constituted, fisher is connected with drilling rod activeness, its two ends cocker/lunge salvaged well casing inwall, and connection fulcrum is located on the eccentric position of fisher plate；Drilling rod bottom is provided with wedge shape guide head.During salvaging, drilling rod is connected with rig, the guiding for starting rig by wedge shape guide head by fishing device lower going-into-well pipe, under it is fashionable, fisher touches or rub the borehole wall causes which to rotate to an angle so as to be close to enter under well casing；Drilling rod is carried above, conduction salvages pulling force to fisher, fisher clamping or stuck salvaged well casing；Drilling rod is carried in continuation, salvaged well casing is risen simultaneously with fisher, the persistently action, and most salvaged well casing salvages sub-salt well at last.The fishing device fishing success ratio is high, fisher can smooth G.I.H, its can success clamping or stuck salvaged well casing, realize the smooth salvaging of well casing.

Description

A kind of sub-salt well down-hole HDPE well casing fishing devices

Technical field

This utility model is related to a kind of sub-salt well down-hole HDPE well casing fishing devices, is mainly used in salvaging sub-salt well down-hole and goes out Water pipe (well casing material：HDPE polyethylene).

Background technology

Downhole tools are salvaged and are always a professional difficult problem.Sub-salt well down-hole narrow space, main equipment are difficult in well Operation.In the big salt flat sub-salt well work progress in lenghu, need from the Φ 160HDPE of underground fishing 40m to 100m length to gather Ethylene well casing.

In down-hole, as brine incrustation causes well casing to be stuck in shaft bottom inflexibly, it is little as above to put forward strength, it is difficult to by its unfreezing. Referring to Fig. 7,6 locking well casing of down-hole salt crust block is illustrated.

Well casing is pulled out according to excavator or crane from well head strength, in most cases, well casing can rupture in down-hole. If rethink with excavator or crane strength rise pull out, due to it is more than ground without well casing exposure, without impetus, it is impossible to operate.Quilt Pull off in the well of well casing also in water spray, very big trouble is caused to engineering.

At present, the country does not have ready-made marine salvage equipment available.

Utility model content

The purpose of this utility model is to provide a kind of high sub-salt well down-hole HDPE well casing fishing devices of fishing success ratio, should Device can smoothly G.I.H, successful clamping or stuck salvaged well casing, realize the smooth salvaging of well casing.

For achieving the above object, this utility model takes following design：

A kind of sub-salt well down-hole HDPE well casing fishing devices, which is combined by drilling rod and fisher and is constituted；

The fisher is connected with described drilling rod activeness；The fisher is two ends cocker/lunge in salvaged well casing The functional configurations plate of wall, the fulcrum of the activeness connection are located on the eccentric position of the functional configurations plate.

In the sub-salt well down-hole HDPE well casing fishing devices, wedge shape guide head is machined with the bottom of drilling rod.

In the sub-salt well down-hole HDPE well casing fishing devices, process for card/lunge at the two ends of functional configurations plate The sword of salvaged well casing inwall.

In the sub-salt well down-hole HDPE well casing fishing devices, described functional configurations plate is arc plate, swing link, trapezoidal Plate or triangular plate.

In the sub-salt well down-hole HDPE well casing fishing devices, the thickness of slab of the fisher is 8～15mm.

In the sub-salt well down-hole HDPE well casing fishing devices, the thickness of slab of the functional configurations plate is 10mm.

In the sub-salt well down-hole HDPE well casing fishing devices, two end points of the maximum spacing of the functional configurations plate Size and not super 10mm of the length more than salvaged well casing diameter.

The utility model has the advantages that：

1. automatically upper can block, reliability is high, and fishing success ratio is high；

2. ability is salvaged strong, maximum capacity 2000kg；

3. simple and practical, few easy workout part is convenient to keep in repair；

4. applied widely；

5. reusable.

Description of the drawings

Structural representation (arrow sensings in figure of the Fig. 1 for this utility model sub-salt well down-hole HDPE well casing fishing devices To salvage direction).

Fig. 2 is one example structure schematic diagram of this utility model fisher (main view).

Fig. 3 is embodiment illustrated in fig. 2 structural representation (side-looking).

Fig. 4 is embodiment illustrated in fig. 2 structural representation (vertical view).

Fig. 5 is another example structure schematic diagram of this utility model fisher (main view).

Fig. 6 is that this utility model fisher surrounds fulcrum circular motion schematic diagram.

Fig. 7 is this utility model sub-salt well down-hole HDPE well casing fishing device course of work schematic diagrams.

Fig. 8 be well in salt crust by well casing locking down-hole schematic diagram.

In figure：1- drilling rods；2-HDPE well casings；3- wall casings；4- fishers；401- through holes；5- wedge shape guide heads；6- salt crusts Block；7- fixing bolts.

Below in conjunction with the accompanying drawings and specific embodiment is described in further details to this utility model.

Specific embodiment

Refering to shown in Fig. 1, one preferred embodiment of this utility model sub-salt well down-hole HDPE well casings fishing device mainly by Drilling rod 1, fisher 4 and wedge shape guide head 5 are constituted.

The drilling rod 1 is used for load-bearing and link fisher 4.

A wedge shape guide head 5 can directly be processed or is fixedly connected with the bottom of 1 drilling rod of the drilling rod, enter to salvage under being used for It is oriented to during device, 45 degree of cutting angle is preferable.

The fisher 4 is a core component of the present utility model, for blocking salvaged well casing (HDPE well casings 2), Which directly can be processed by steel plate.The concrete structure of one embodiment (includes specification, unit：Mm Fig. 2, Fig. 3 be can be found in) And Fig. 4.Fisher maximum feature is：Eccentric setting, the eccentric position on fisher steel plate open up through hole 401, the salvaging Device can be fixed on drilling rod 1, during work by fixing bolt 7 (or pin), can be in the presence of very little frictional force, around wearing The fixing bolt (or pin) for crossing through hole 401 moves in a circle, referring to Fig. 6.

Preferably, sword can be processed at the two ends of this utility model fisher so as to easily block/lunge HDPE plastic well casing Inwall.

The dominant shape shape of the fisher 4 is can be found in shown in Fig. 2, and preferred embodiment is formed into the circular arc plate shape with straight flange, Also crescent (referring to Fig. 5), trapezoidal or triangular plate are can be made into, plate whatever, the rotation in its course of work make which Can enter in salvaged HDPE well casings 2 with drilling rod, i.e. length L of 4 plate ultimate range two-end-point of fisher should be greater than being beaten The size (and not super 10mm) of well casing diameter is dragged for, the width W of plate is less than the salvaged diameter for salvaging well casing.

The normal dia of existing sub-salt well down-hole HDPE well casings is generally adopted by 160mm, and the thickness of slab of the fisher can be with From 8～15mm of thickness；In one preferred embodiment of this utility model, the drill pipe diameter Φ 89 of employing, the long 175mm of fisher beat Device thickness of slab 10mm is dragged for, the maximum capacity of fishing device can reach 2000kg.

Shown in Figure 7, this utility model sub-salt well down-hole HDPE well casing fishing device operation principles and process are：Utilize Wedge shape guide head 5 is oriented to, it is ensured that enter salvaged well casing (well casing material under will be fisher 4 smooth：HDPE polyethylene)；Profit Automatically upper the card is carried out with fisher 4, it is ensured that the salvaged HDPE well casings 2 of fishing device clamping.Used with well-digging engineering using drilling rod 1 Rig connection, above carry drilling rod 1, conduction salvages pulling force to described fisher 4, fisher clamping or stuck salvaged HDPE Well casing 2.Drilling rod 1 is carried in continuation, salvaged HDPE well casings 2 are slowly risen simultaneously with fisher 4, the persistently action, or repeatedly weight Multiple aforementioned process (such as clamping adverse conditions), until eventually needing to salvaged HDPE well casings 2 salvages sub-salt well.

This utility model sub-salt well down-hole HDPE well casing fishing devices are applied widely, are applicable not only to HDPE polyethylene wells The salvaging of pipe, is equally applicable to the salvaging of cast iron pipe, stainless steel tube, glass reinforced plastic pipe and alloy pipe.Critical piece (drilling rod 1, is beaten Drag for device 4 and wedge shape guide head shape 5) and size can be matched and be customized according to salvaged well casing.

This utility model sub-salt well down-hole HDPE well casing fishing device simple structures, easy to process, few easy workout part are convenient to tie up Repair.It is particularly suitable for field wellbore construction field operation, and it is recyclable, it is reusable.

The various embodiments described above can some changes in addition under without departing from scope of the present utility model, therefore the explanation of the above is wrapped Containing and accompanying drawing shown in structure should be regarded as it is exemplary, and be not used to limit the application patent protection domain.

Claims

1. a kind of sub-salt well down-hole HDPE well casing fishing devices, it is characterised in that：Which is combined by drilling rod and fisher and is constituted；

The fisher is connected with described drilling rod activeness；The fisher is two ends cocker/lunge salvaged well casing inwall Functional configurations plate, the fulcrum of the activeness connection are located on the eccentric position of the functional configurations plate.

2. HDPE well casing fishing devices in sub-salt well down-hole according to claim 1, it is characterised in that：Add in the bottom of drilling rod Work has wedge shape guide head.

3. HDPE well casing fishing devices in sub-salt well down-hole according to claim 1, it is characterised in that：In functional configurations plate Two ends process the sword for the salvaged well casing inwall of card/lunge.

4. HDPE well casing fishing devices in sub-salt well down-hole according to claim 1, it is characterised in that：Described functional configurations Plate is arc plate, swing link, trapezoidal plate or triangular plate.

5. HDPE well casing fishing devices in sub-salt well down-hole according to claim 4, it is characterised in that：The plate of the fisher Thick is 8～15mm.

6. HDPE well casing fishing devices in sub-salt well down-hole according to claim 4, it is characterised in that：The functional configurations plate Thickness of slab be 10mm.

7. HDPE well casing fishing devices in sub-salt well down-hole according to claim 1, it is characterised in that：The functional configurations plate Ultimate range two-end-point length more than salvaged well casing diameter size and not super 10mm.