CN201232532Y - Hydraulic combination window opening tool - Google Patents

Abstract

The utility model relates to a hydraulic combined window opening tool in the field of down-hole drilling tools; the tool comprises a milling cone and a whipstock; the milling cone is arranged on the upper end of the whipstock; the upper end of the whipstock is an inclined iron; bosses are arranged at different positions up and down on the upper end of the inclined iron; the head of the milling cone is stuck between the two bosses sidewards; the lower end of the milling cone and the upper end of the inclined iron are connected with a stable screw which is arranged sidewards; the milling cone and the inclined iron are respectively provided with eccentric through holes; the two eccentric through holes are connected by a pressure transmitting pipe; the inclined iron and the pressure transmitting pipe are connected by a shear pin which is arranged sidewards; and the lower end of the pressure transmitting pipe is provided with a ball seat. The tool is lowered at a window opening position of a sleeve in a well, pressurizes through the eccentric through holes so that the whipstock is sealed, and then separates the milling cone and the whipstock through ground pitching, drilling tool rotating and other processes, lowers a drill string and then opens the window with the milling cone. The device is lowered into the well and can open the window with the sleeve at one time, improves the working efficiency, saves expense, and can be applied in petroleum drilling and exploitation.

Description

The hydraulic combined instrument of windowing

Technical field

The utility model relates to the drilling well downhole tool, particularly a kind of instrument of windowing.

Background technology

In the sidetracked hole construction of oil field, at first to carry out windowing task to sleeve pipe.At present, the instrument of windowing of employing is mostly formed by milling awl and whipstock etc.Described whipstock includes the wedge that the upper end is provided with, described wedge lower end is connected with piston cylinder, the piston cylinder inner chamber is respectively equipped with upper cone piston and the lower cone piston that has centre bore up and down, described upper cone piston and the opposing setting of lower cone piston, upper cone piston top is provided with the last transit joint of hollow, the described transit joint cavity upper end of going up links to each other with the eccentric through-hole of wedge, last transit joint lower end cooperates in the centre bore that inserts on the upper cone piston, the centre bore lower end of upper cone piston is connected with central tube, central tube cooperates downwards in the centre bore that inserts on the lower cone piston, the pipeline section that central tube stretches in the lower cone piston is provided with stopper outward, be provided with in the centre bore of lower cone piston with central tube on the corresponding non-return ring of going up of stopper; The cone fit on upper cone piston top is provided with the upper slips that is stuck in the window of offering on the piston cylinder barrel, and the cone fit on of lower cone piston bottom is provided with the lower slips that is stuck in the window of offering on the piston cylinder barrel; Piston cylinder lower end warp transit joint down is connected with the auxiliary piston tube, be provided with the stepped piston of hollow in the auxiliary piston tube, the big footpath section of stepped piston matches with the auxiliary piston tube, be provided with unidirectional valve in the cavity of stepped piston, cooperate in the following transit joint to be provided with axially mobilizable interior transit joint, interior transit joint is connected the centre bore lower end and the auxiliary piston inner chamber of lower cone piston; Auxiliary piston tube bottom is connected with big central tube, stepped piston lower end is stretched in the big central tube, the path section of stepped piston is provided with stopper outward, big central tube inboard is provided with the stopper corresponding down non-return ring outer with the path section of stepped piston, big central tube lower end is connected with locking cap, the big central tube pipeline section of locking cap upside is set with packing element and pressure ring outward, stepped piston lower end radially is provided with bearing pin, big central tube both sides are axially arranged with straight trough, straight trough is passed at described bearing pin two ends, bearing pin two ends downsides is conflicted on the pressure ring upper surface, also is provided with radial hole on the stepped piston Kong Yuda central tube external space of unidirectional valve downside is connected.Work progress is: send into whipstock to predetermined well depth position with drill string earlier, built the pressure in drill string by the ground turn on pump, make whipstock seat envelope, then, trip out drilling rod, mill awl down again casing milling is windowed, this windowing method technology falls behind, job execution is loaded down with trivial details relatively, inefficiency, and the cycle of windowing is long.

The utility model content

The purpose of this utility model is to provide a kind of hydraulic combined instrument of windowing, and only need once go into the well, and can carry out casing sidetracking, to increase work efficiency, saves operating expenses.

For achieving the above object, a kind of hydraulic combined instrument of windowing that the utility model provides comprises and mills awl and whipstock, mills awl and is arranged on the whipstock upper end; The whipstock upper end is a wedge, wedge upper end diverse location up and down respectively is provided with a boss, milling the conehead side direction snaps between two boss, milling the awl lower end is connected via laterally disposed steady nail with the wedge upper end, mill in awl and the wedge and be respectively equipped with eccentric through-hole, be connected through pressure tube between two eccentric through-holes, be connected through laterally disposed shear pin on the described wedge with between the pressure tube, the pressure tube lower end is provided with ball seat.

The utility model will mill awl and whipstock combines as a whole, and pressurize by eccentric through-hole in a G.I.H casing sidetracking position, make whipstock seat envelope earlier, then by ground pitching, technology such as rotation drilling tool etc., make and mill awl and whipstock is thrown off, transfer drill string again and just can utilize to mill to bore and carry out windowing task.Compared with prior art, the utility model instrument is once gone into the well, and can carry out casing sidetracking, has overcome the drawback that traditional instrument of windowing removes two times drill strings at least, has improved operating efficiency, has saved operating expenses, can be applicable in oil drilling, the exploitation.

For making the whipstock can be well secured in sleeve pipe, the upper slips outside and the lower slips outside be provided with each other vertical tooth and horizontal tooth in length and breadth; Laterally tooth is meant the tooth that is circumferential extension, and vertically tooth is meant and is axially extended tooth; The upper slips outside and one in the lower slips outside are provided with horizontal tooth, can avoid whipstock to go here and there up and down, and another is provided with vertical tooth, can avoid whipstock to rotate.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the partial enlarged drawing of A among Fig. 1.

Among the figure 1, mill awl, 2, steady nail, 3, wedge, 4, pressure tube, 5, shear pin, 6, ball seat, 7, piston cylinder, 8, upper slips, 9, the upper cone piston, 10, central tube, 11, the transition piston, 12, spring, non-return ring on 13,14, the lower cone piston, 15, lower slips, 16, following transit joint, 17, the auxiliary piston tube, 18, unidirectional valve, 19, stepped piston, 20, following non-return ring, 21, big central tube, 22, bearing pin, 23, pressure ring, 24, packing element, 25, locking cap, transit joints in 26, go up transit joint, 27,28 boss, 29 mill conehead.

The specific embodiment

As shown in the figure, be the hydraulic combined instrument of windowing, comprise and mill awl 1 and whipstock, mill awl 1 and be arranged on the whipstock upper end; Whipstock includes wedge 3, wedge 3 upper ends diverse location up and down respectively are provided with a boss 28, milling conehead 29 side direction snaps between two boss 28, milling awl 1 lower end is connected via laterally disposed steady nail 2 with wedge 3 upper ends, mill in awl 1 and the wedge 3 and be respectively equipped with eccentric through-hole, be connected through pressure tube 4 between two eccentric through-holes, be connected through laterally disposed shear pin 5 on the wedge 3 with between the pressure tube 4, pressure tube 4 lower ends are provided with ball seat 6; Wedge 3 lower ends are connected with piston cylinder 7, the piston cylinder inner chamber is respectively equipped with upper cone piston 9 and the lower cone piston 14 that has centre bore up and down, described upper cone piston 9 and the 14 opposing settings of lower cone piston, but also be provided with transition piston 11 between upper cone piston 9 and the lower cone piston 14 with piston cylinder 7 relative motions, upper cone piston 9 tops are provided with the last transit joint 26 of hollow, last transit joint 26 cavitys upper end links to each other with the eccentric through-hole of wedge 3, last transit joint 26 lower ends cooperate in the centre bore that inserts on the upper cone piston 9, the centre bore lower end of upper cone piston 9 is connected with central tube 10, central tube 10 is passed down through transition piston 11 and cooperates in the centre bore that inserts on the lower cone piston 14, central tube 10 pipeline sections between lower cone piston 14 and the transition piston 11 are set with spring 12 outward, the pipeline sections that central tube 10 stretches in the lower cone piston 14 are provided with stopper outward, be provided with in the centre bore of lower cone piston 14 with central tube on the corresponding non-return ring 13 of going up of stopper; The cone fit on upper cone piston 9 tops is provided with the upper slips 8 that is stuck in the window of offering on the piston cylinder barrel, the cone fit on of lower cone piston 14 bottoms is provided with the lower slips 15 that is stuck in the window of offering on the piston cylinder barrel, and upper slips 8 outsides and lower slips 15 outsides are provided with each other vertical tooth and horizontal tooth in length and breadth; Piston cylinder 7 lower ends warp transit joint 16 down is connected with auxiliary piston tube 17, be provided with the stepped piston 19 of hollow in the auxiliary piston tube 17, the big footpath section of stepped piston 19 matches with auxiliary piston tube 17, be provided with unidirectional valve 18 in the cavity of stepped piston 19, cooperate in the following transit joint 16 to be provided with axially mobilizable interior transit joint 27, interior transit joint 27 is connected the centre bore lower end and the auxiliary piston inner chamber of lower cone piston 14; Auxiliary piston tube 17 bottoms are connected with big central tube 21, stepped piston 19 lower ends are stretched in the big central tube 21, the path section of stepped piston 19 is provided with stopper outward, big central tube 21 inboards are provided with the stopper corresponding down non-return ring 20 outer with the path section of stepped piston 19, big central tube 21 lower ends are connected with locking cap 25, big central tube 21 pipeline sections of locking cap 25 upsides are set with packing element 24 and pressure ring 23 outward, stepped piston 19 lower ends radially are provided with bearing pin 22, big central tube 21 both sides are axially arranged with straight trough, straight trough is passed at described bearing pin 22 two ends, bearing pin 22 two ends downsides are conflicted on pressure ring 23 upper surfaces, also be provided with radial hole on the stepped piston 19 Kong Yuda central tube 21 external spaces of unidirectional valve 18 downsides are connected.

During work, this device is lowered into the down-hole casing position of windowing, elder generation's turn on pump builds the pressure, pressurize by eccentric through-hole, promoting upper cone piston 9 under hydraulic action moves upward, promoting transition piston 11 simultaneously moves downward, compression spring 12 continues to promote lower cone piston 14 and moves downward, thereby upper slips and the outside distending of lower slips are clamped on the oil well casing wall, simultaneously, stepped piston 19 moves downward, by bearing pin 22, pressure ring 23 grades are moved and compression packing element 24, packing whipstock and casing annulus, the effect of stopper be to make upper slips and lower slips still can jam after the release in sleeve pipe, also make packing element keep the packing state of elastic deformation; After the release, can pitching in drill string, when treating that ball is fallen on pressure tube 4 ball seats 6, turn on pump builds the pressure once more, when pressure was enough big, the shear pin 5 on the wedge 3 was cut off, and pressure tube 4 moves down, drop in the wedge 3, then, the rotation drilling tool connects the steady nail 2 that mills awl 1 and wedge 3 and is cut off, mill awl 1 and separate, transfer drill string again and just can utilize and mill awl 1 and carry out windowing task with wedge 3.

Claims (1)

1, a kind of hydraulic combined instrument of windowing comprises and mills awl and whipstock, it is characterized in that milling awl and is arranged on the whipstock upper end; The whipstock upper end is a wedge, wedge upper end diverse location up and down respectively is provided with a boss, milling the conehead side direction snaps between two boss, milling the awl lower end is connected via laterally disposed steady nail with the wedge upper end, mill in awl and the wedge and be respectively equipped with eccentric through-hole, be connected through pressure tube between two eccentric through-holes, be connected through laterally disposed shear pin on the described wedge with between the pressure tube, the pressure tube lower end is provided with ball seat.

Images