CN201090162Y - Well sleeve ground windowing facility - Google Patents

Abstract

The utility model relates to a casing sidetracking apparatus; in particular to a drilling casing ground sidetracking apparatus simulating the operating condition in underground. The utility model comprises a hydraulic cylinder, a base seat, a support, a drill pipe, a centralizer, a milling taper, a casing and a whipstock; the milling taper, the centralizer and the drill pipe are connected together sequentially and then connected with a motor and an output shaft of a variable speed device; and the motor and the variable speed device can slide along the base seat, the piston in the hydraulic cylinder resists the back face of the motor and the variable speed device, the outer ring wall of the casing is poured with a cement mounting section, when in operation, the motor and the variable speed device can be opened so as to utilize the milling taper to simulate the operating condition in underground for carrying out sidetracking operations to casings of various sizes, and the opened casing window is close to the actual casing window, thereby facilitating other tests.

Description

A kind of well casing ground windowing facility

Technical field:

The utility model relates to a kind of casing sidetracking device; Especially simulate a kind of well casing ground windowing facility of underground working.

Background technology:

Casing window sidetracking well technology is that a kind of instrument of will windowing in the OW sleeve pipe is down to predetermined well depth, force milling tool to produce side cutting power by the whipstock after hanging, milling out a window by predetermined direction on casing wall makes prime stratum exposed again, and then the wellbore construction face that carries out sidetracked hole and sidetrack horizontal well forms new well drilling technology, this is bringing into play crucial effect to improving the oil well recovery ratio, because casing sidetracking is mainly used in the Multilateral Wells, windowing actually, the key of quality is its bifurcation window sealing, be as the criterion and determine position and effectively sealing, therefore need window rear hatch shape and size of down-hole casing understood and grasped, it in the existing technology size according to the formula calculation window, but the true form behind the casing sidetracking is owing to underestimated by multiple factor affecting, thereby influenced the quality of casing sidetracking, this device is a kind of device that underground working carries out casing sidetracking of simulating, and can improve the down-hole casing quality of windowing.

The utility model content:

The utility model purpose is a kind of well casing ground windowing facility that provides in order to overcome above-mentioned deficiency, utilizes the simulation underground working to finish casing sidetracking, and the sleeve pipe window of being left can be convenient to carry out other test near actual sleeve pipe window.

The technical solution of the utility model is:

It by hydraulic cylinder, base, support, drilling rod, centralizer, mill awl, sleeve pipe, whipstock and form; Described awl, centralizer, the drilling rod of milling links to each other with motor and transmission output shaft after sequence interlock again; Described motor and speed changer are seated in above the base, and can slide thereon; Hydraulic cylinder shell is fixed on the base by support, and the piston in the hydraulic cylinder withstands on the back side of motor and speed changer, is cast with the cement sealing section around the described sleeve pipe external annulus, is drilled with the perforation eyelet above the cement sealing section, and this eyelet communicates with the sleeve pipe eyelet.

The utility model working method:

The sleeve pipe that will window and the supporting whipstock of windowing are fixed together and are installed on the support of ground certain altitude, be placed on then on the base on ground, water filling in the sleeve pipe at position of windowing when windowing, awl and flushing drilling cuttings are milled in cooling, can simulate the pressure of the drill because the piston of hydraulic cylinder top withstands on the back side of motor and speed changer, therefore after opening motor and speed changer, utilize hydraulic cylinder and water pump just can simulate underground working and carried out windowing task.

The utility model compared with prior art has distinguishing feature:

This device since be equipped with on ground simulated formation cement sealing section and the hydraulic cylinder, motor and the speed changer that connect by drilling rod, mill awl and whipstock, therefore when construction, can carry out the casing sidetracking operation of various sizes according to underground working, making it to window more can be near down-hole actual sleeve pipe window situation, this device has overcome the drawback that traditional employing design formulas design window size and the multiple influence factor in down-hole are brought, thereby has guaranteed the quality of casing sidetracking.

Description of drawings:

Accompanying drawing is the utility model structural representation.

Among the figure by: 1, hydraulic cylinder 2, motor and speed changer 3, drilling rod 4, centralizer 5, mill awl 6, cement sealing section 7, sleeve pipe 8, whipstock 9, support 10, base are formed.

The specific embodiment:

The utility model is provided by following examples, is described further below in conjunction with accompanying drawing.

Base 10 is manufactured the rectangle metab that forms for i iron, by support 9 hydraulic cylinder 1 is fixed in the above, motor and transformer 2 are sitting in above the base 10, but can horizontally slip along base rail, be connected together with the output shaft of motor and speed changer 2 again after will milling awl 5 centralizers 4 drilling rods 3 during installation earlier and being linked in sequence, piston above the hydraulic cylinder 1 need withstand on the back side of motor and speed changer 2, so that simulate the pressure of the drill.Centralizer 4 can play centralizing function to milling awl in running in sleeve pipe 7.In addition, sleeve pipe 7 and the supporting whipstock 8 of windowing that will window during construction are fixed together, be contained in behind the support 9 of ground certain altitude and be placed on again on the base 10 on ground, and around the sleeve pipe at the position of will windowing casting cement interval isolation 6 simulated formations, and punching on cement sealing section 6, mill awl 5 so that when windowing, utilize water pump water filling cooling in sleeve pipe 7, and go out drilling cuttings, only need open motor and speed changer 2 hydraulic cylinders 1 and pump switch when windowing and just can simulate underground working and carried out windowing task.Awl 5 whipstocks 8 that mill described in the utility model are existing conventional instrument.

Claims (1)

1. well casing ground windowing facility is by hydraulic cylinder (1), base (10), support (9), drilling rod (3), centralizer (4), mill awl (5), sleeve pipe (7), whipstock (8) and form; It is characterized in that described awl (5), centralizer (4), the drilling rod (3) of milling links to each other with motor and speed changer (2) output shaft again after sequence interlock; Described motor and speed changer (2) are seated in above the base (10), and can slide in the above; Described hydraulic cylinder (1) shell is fixed on the base (10) by support (9), piston in the hydraulic cylinder (1) withstands on the back side of motor and speed changer (2), be cast with cement sealing section (6) around described sleeve pipe (7) external annulus, the cement sealing section is drilled with the perforation eyelet above (6), and this eyelet communicates with sleeve pipe (7) eyelet.

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