CN2283123Y

CN2283123Y - Multiple folding face whipstock for opening window side drill

Info

Publication number: CN2283123Y
Application number: CN 96204795
Authority: CN
Inventors: 刘根梅; 蔡镜仑; 孙宏寿; 赵宁; 张冬青; 刘志洲
Original assignee: BEISHI NEW MATERIAL TECHNOLOGY DEVELOPMENT Co BEIJING
Current assignee: BEISHI NEW MATERIAL TECHNOLOGY DEVELOPMENT Co BEIJING
Priority date: 1996-04-04
Filing date: 1996-04-04
Publication date: 1998-06-03
Anticipated expiration: 2006-04-04

Abstract

The utility model relates to a multiple folding face whipstock for opening window in a prospect well, which is characterized in that one side of a cylinder is formed by that multiple sections of slopes and a section of vertical plane are connected into integration; the effective segment length of the window can be extended, which is safe for the side drill construction; the utility model is practical.

Description

Window sidetracking is with many foldings face whipstock

The utility model relates to mining industry exploration and development field, the window whipstock of usefulness of relevant mineral reserve well, particularly a kind of many foldings face whipstock that can prolong the effective segment length of window.

At present, known mineral reserve well window be the whipstock set at existing single inclination angle in sleeve pipe, utilize its inclined-plane to window, when the inclined plane of the guide rod that mills tool or body contact whipstock, it is descending along the inclined plane to mill tool, and force and mill tool deflection sleeve pipe one side and come milling cover tube wall, along with milling the stroke that tool enters, offset distance progressively strengthens, and worn out finally cover tube wall and side go out sleeve pipe, leaves a window at union body, its shape as shown in Figure 1, we can see that after milling tool contact tube wall just mill out maximum window in very short stroke, its width is W _Max, it is still descending along the inclined plane of whipstock to mill tool then, and the window that mills out just diminishes step by step, until zero W _Min=0, although the window total length is longer, valid window W _MaxFor that section of maximum but is limited, shortcoming that existing single inclination angle whipstock exists that Here it is.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of maximized window that can prolong is provided.Many foldings face whipstock of effective segment length.

The purpose of this utility model is achieved in that the special feature of this many foldings of window sidetracking face whipstock and existing single inclination angle whipstock is that a side of cylinder is by the inclined-plane of multistage and one section vertical guide (referring to Fig. 2) of the being constituted one section inclined-plane before this that links into an integrated entity, then one section is vertical guide, final stage is again the inclined-plane, also two sections inclined-planes before this, then one section is vertical guide, and final stage or two sections are the inclined-planes.Multiple combining (seeing also Fig. 3-8) can also be done in plurality of sections inclined-plane and vertical guide, can be broken line in its adjacent two sections junctions, but individual curvature is preferably arranged, make when milling tool work and can seamlessly transit, cylinder can be solid, also can be hollow, i.e. the whipstock of institute's stomach formula capable of circulation.

Many foldings face whipstock of taking above-mentioned measure to constitute makes that milling tool leaves window, when it leaves the maximized window width W _MaxThe time, it is just descending along vertical guide to mill tool, continues the milling tube wall, has prolonged the maximized window width W _Max, the length that has just prolonged valid window, it is descending along another section inclined-plane again to mill tool then, and window gradually reduces, until zero W _Min=0, just leave the sleeve pipe side and go into the stratum so mill tool.Obviously adopt this many foldings face whipstock, prolonged valid window length, help engineering construction.

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is with the whipstock windowing method at single inclination angle and the schematic diagram of window shape;

Fig. 2 is with the schematic diagram of many foldings face whipstock windowing method and window shape;

Fig. 3 plane many foldings face whipstock;

Many foldings of Fig. 4 curved surface face whipstock;

Fig. 5 has plane many foldings face whipstock of curvature;

Fig. 6 has many foldings of curved surface face whipstock of curvature;

Fig. 7 has plane many foldings face whipstock of many inclined-planes combination of curvature;

Fig. 8 has many foldings of curved surface face whipstock of many inclined-planes combination of curvature

Among the figure, A, B, C, D, E, F are the flex points that each section of many foldings face whipstock face connects, and R is a radius of curvature, β ₁, β ₂Be inclination angle of inclined plane

1, single inclination angle whipstock 2, guide rod 3, mill tool 4, sleeve pipe

5, otch 6, window shape 7, many foldings face whipstock

In Fig. 1, can find out valid window Breadth Maximum W _MaxBe very short.

In Fig. 2, just can find out valid window Breadth Maximum W _MaxBe very long, we mill tool according to whipstock during design, the size of sleeve pipe, and the calculation window width is determined the B point, generally makes β ₁〉=β ₂, AB＜＜CD, present embodiment adopts sleeve pipe Mill tool D _m=120 ^Mm, guide rod φ 75*600mm, whipstock φ 114 ^Mm, top thick 15 ^Mm, the result that single inclination angle whipstock and many foldings face whipstock are windowed contrasts:

Single inclination angle whipstock β ₁=β ₂=3 °, the inclined-plane length overall is 1889.03mm, the long 57.24mm of effective section window,

Many foldings face whipstock, β ₁=β ₂In the time of=3 °, the inclined-plane length overall is 2059.53mm, effectively the long 227.24mm of section window.

The result demonstrates the superiority of many foldings face whipstock, and it is creative, and novelty, practicality are undoubtedly.

Claims

1, a kind of window sidetracking is bar shape with many foldings face whipstock, and a side that it is characterized in that cylinder is linked into an integrated entity by the inclined-plane of multistage and one section vertical guide and constitutes.

2, a kind of window sidetracking according to claim 1 is characterized in that with many foldings face inclined-plane device a side of cylinder is by bevel phase, and the vertical guide section is again that bevel phase is in turn connected into one and constitutes.

3, a kind of window sidetracking according to claim 1 and 2 is characterized in that described bevel phase and vertical guide section with many foldings face whipstock, can be the plane on its every section face, also can be curved surface.

4, a kind of window sidetracking according to claim 1 and 2 is characterized in that in its adjacent two sections face junctions certain curvature being arranged with many foldings face whipstock, also can be broken line.

5, a kind of window sidetracking according to claim 1 and 2 is characterized in that with many foldings face whipstock described cylinder is solid, or hollow.