RU99108388A

RU99108388A - METHOD FOR THE FORMATION OF WELLS AND PRODUCTION IN GEOLOGICAL STRUCTURES

Info

Publication number: RU99108388A
Application number: RU99108388/03A
Authority: RU
Inventors: Александр Илларионович Плугин
Original assignee: Александр Илларионович Плугин
Filing date: 1999-04-21
Publication date: 2001-02-10

Claims

1. The method of formation of wells and workings in geological structures, including placement of a drilling unit on the bottom, with the help of which rock destruction is carried out by impacting the working agent streams flowing under pressure from the working unit of the drilling unit, removing drill cuttings from the bottom of the bottom and feeding the working body to the face as the geostructures are drilled, characterized in that the beginning of the well sinking, from the wellhead, is fed by the working body to the face along with the drilling unit carrying it due to the application mechanical force to the upper end of the housing of the drilling unit and at the same time efforts from the working agent jets flowing out and oriented to the same end, rock breakage at the bottom are carried out by the outflowing working agent jets oriented to the bottom surface, normal and at sharp angles reflected from the bottom hole by the flow of the working agent removes the cuttings from the cavity of the well being formed, then, when driving a well with a depth commensurate with the length of the body of the drilling unit, including its working body, the geological their structures are driven by impacting the bottom of the working agent with jets oriented along the normal and at sharp angles to the bottom surface — at its center, and with rings covering it coaxially and directed at an angle to each other, as well as at sharp angles to the wall of the well being passed, some of which are oriented at an angle to the wall of the well in the direction opposite to the bottom, with the help of which they calibrate the cross section of the well to a given diameter and simultaneously create two efforts: and if its working body goes to face in an autonomous mode, and - to create an upward flow exceeding in its speed the velocity of particles of destroyed rock, which in the form of drill cuttings is carried to the wellhead, - to the surface, then the geostructures are driven by the slaughter of the drilling unit due to the orientation of the part of the expiring jets of the working agent, or due to the outflow of the additional working agent, from which the upward stream is formed - to the wellhead, an upward flow carrying a bu oic cuttings to the surface; as the well deepens further, the cavity is ejected, thereby increasing the removal of drill cuttings from it, then use the portioned rise of the drilled rock by filtering the drill cuttings and selecting the rock into the storage bin, which is periodically lifted to the surface, lowering instead another, and at the end of the well sinking process, the face is affected only by the working agent jets expiring along the normal to its center, along the axis of the well, and the well cavity is freed from the remnants of drill cuttings and from the drilling unit used for its formation, moreover, the process of penetration of geostructures is carried out when the following physical-technological regularity is set in the well cavity (production):
F _p = F ₁ + F ₂ + F ₃ + F ₄ + F ₅ ,
where F _p - the total force that must be transferred from the stream of jets of the working agent to the entire area of the face;
F ₁ - the effort spent on the preliminary processing of the face, preceding the moment of destruction of the rock;
F ₂ - the effort spent on the destruction of the rock;
F ₃ - the effort spent on the removal of the destroyed rock from the bottom zone;
F ₄ - the effort spent to overcome the outgoing drill cuttings annular gap between the wall of the well and the body of the drilling unit;
F ₅ - the effort spent on creating an upward flow above the drilling unit for the removal of sludge to the wellhead (on the surface), or to the height of its intake in the storage hopper, or to the height of the beginning of its ejection, where the force F ₅ increase + ΔF ₅ not at the expense of the main effort - F ₅ created by this process,
as well as subject to regularity:
P _well = P _ABA ,
where P _well - pressure reflected from the walls of the borehole gas and drill cuttings on the surface area of the autonomous drilling unit used in the method;
P _ABA - pressure reflected from the surface of the body of an autonomous drilling unit of drill cuttings and gases on the wall of the well in the length section of the body of this ABA.

2. The method of formation of wells according to claim 1, characterized in that when stops a well is drilled, the bottom hole is affected only by jets flowing normal to the center of the bottom along the axis of the hole and the well cavity is freed from residual drill cuttings and from the used drilling unit.

3. The method of formation of wells according to claim 1, characterized in that when the wall of the well is suddenly destroyed and released into its cavity, work on the bottom is stopped due to the cessation of the action of jets normally oriented and oriented at angles, create excess pressure in the well cavity beyond by feeding into its cavity an upward flowing agent from the working body of the unit, this overpressure prevents further discharge into the cavity of the well and, after the emergency is eliminated, tunneling is continued.

4. The method according to claims 1 and 3, characterized in that when resuming the well sinking process, it is preliminarily cleaned and purged, both operations are carried out by using upward working agent jets from the drilling unit immersed in the well, the upward flow of which is oriented up - to the wellhead.