Method for putting together of a drilling device and drilling device

Abstract

A method for assembling a drilling device. A first drilling member is power transittingly, coupled with a second drilling member during drilling for rotational, feeding and/or hammering motion, and removably coupled to remove the first drilling member from a hole. A casing is pulled into the hole by power from the second drilling member transmitted through a shoulder between the casing and second drilling member. The shoulder enables independent rotation of the casing and second drilling member and restricts mutual longitudinal movement thereof. A casing shoe is fastened at an end of the casing and includes an internal or external counterpart shoulder in the radial direction of the shoulder. A separate sleeve minimizes radial expansion of an outermost structural part in the drilling device and/or kinetic energy transmitted by counterpart shoulders. Also, a drilling device.

1 - 8 . (canceled) 
     
     
         9 . A method for assembling a drilling device for a down-the-hole apparatus, wherein a hole is drilled utilizing the drilling device and a casing part, wherein the drilling device comprises a drilling head comprising a drilling arrangement including a first drilling member configured to drill a center hole and a second drilling member configured to ream the center hole for the casing part, wherein the first drill member and the second drilling member are essentially rotationally symmetrical, the method comprising:
 coupling the first drilling member and the second drilling member at least during drilling in a power transmitting manner to carry out cooperation thereof for at least one of a rotational motion, a feeding motion or a hammering motion, and removably to enable removal of the first drilling member from a drilled hole;   arranging the casing part to be pulled into the hole to be drilled by power directed thereto from the second drilling member through a shoulder arrangement between the casing part and the second drilling member, the shoulder arrangement enabling an independent rotational movement of the casing part and the second drilling member with respect to each other and restricting mutual longitudinal movement thereof;   utilizing a separate casing shoe that is to be fastened at an end of the casing part and provided with an internal or external counterpart shoulder in the radial direction of the shoulder arrangement; and   at least one of radial expansion of an outermost structural part in the drilling device or kinetic energy being transmitted by counterpart shoulders of the shoulder arrangement, is minimized utilizing a separate sleeve arrangement in longitudinal direction between the counterpart shoulders, in the radial direction in opposite directions at an inner end of the second drilling member and outer end of the casing shoe, of the shoulder arrangement between the casing shoe and the second drilling member.   
     
     
         10 . The method according to  claim 9 , wherein the kinetic energy comprises a hammering motion. 
     
     
         11 . The method according to  claim 9 , further comprising:
 forming the drilling head of the drilling device of a first frame part and a second frame part;   providing drilling surfaces formed of end surfaces of the frame parts with drilling organs of the first drilling member and the second drilling member; and   placing the sleeve arrangement in the longitudinal direction between an internal or external counterpart shoulder in connection with the casing shoe and an external or internal counterpart shoulder at an end of the second drilling member.   
     
     
         12 . The method according to  claim 11 , wherein the drilling surfaces are formed of at least one of an integrated drilling part, separate drilling pieces, bits. 
     
     
         13 . The method according to  claim 11 , wherein second drilling member comprises the second frame part. 
     
     
         14 . The method according to  claim 9 , further comprising:
 utilizing a wear/slide ring as the sleeve arrangement comprising an essentially rigid structure.   
     
     
         15 . The method according to  claim 14 , wherein the wear/slide ring comprises at least one of metal, plastic, ceramic, composite material. 
     
     
         16 . The method according to  claim 14 , wherein wear/slide ring minimizes wear of the counterpart shoulders of the shoulder arrangement. 
     
     
         17 . The method according to  claim 9 , further comprising:
 utilizing a flexion/damping ring as the sleeve arrangement having an essentially flexible structure.   
     
     
         18 . The method according to  claim 17 , wherein the flexion/damping ring comprises at least one of rubber, plastic, composite material. 
     
     
         19 . The method according to  claim 17 , wherein the flexion/damping ring minimizes kinetic energy transmitted by the counterpart shoulders. 
     
     
         20 . The method according to  claim 17 , wherein the flexion/damping ring minimizes hammering motion. 
     
     
         21 . A drilling device for a down-the-hole apparatus for drilling a hole utilizing the drilling device and a casing part, the drilling device comprising:
 a drilling head comprising a drilling arrangement including a first drilling member configured to drill a center hole and a second drilling member configured to ream the center hole for the casing part, wherein the first drilling member and the second drilling member are essentially rotationally symmetrical, wherein the first drilling member and the second drilling member are coupled with each other at least during drilling in a power transmitting manner to cooperate for at least one of a rotational motion, a feeding motion or a hammering motion, and wherein the first drilling member and the second drilling member are removably coupled with each other to enable removal of the first drilling member from a drilled hole;   a shoulder arrangement configured to pull the casing part into the hole to be drilled by the second drilling member, wherein the shoulder arrangement is arranged between the casing part and the second drilling member, and wherein the shoulder arrangement permits an independent rotational movement of the casing part and the second drilling member with respect to each other and restrict mutual longitudinal movement thereof;   a separate casing shoe to be fastened at an end of the casing part and comprising an internal or an external counterpart shoulder in radial direction of the shoulder arrangement; and   a separate sleeve arrangement arranged in longitudinal direction between counterpart shoulders in the radial direction in opposite directions at inner end of the second drilling member and outer end of the casing shoe, of the shoulder arrangement between the casing shoe and the second drilling member to minimize radial expansion of the outermost structural part in the drilling device and/or to minimize kinetic energy transmitted by the counterpart shoulders.   
     
     
         22 . The drilling device according to  claim 21 , wherein the separate sleeve arrangement minimizes hammering motion. 
     
     
         23 . The drilling device according to  claim 21 , wherein the drilling head comprises a first frame part and a second frame part, the first frame part and the second frame part comprising drilling surfaces formed at end surfaces of the first frame part and the second frame part, the drilling surfaces comprising drilling organs of the first drilling member and the second drilling member, and wherein the sleeve arrangement is arranged in the longitudinal direction between an internal or external counterpart shoulder in connection with the casing shoe and an external or internal counterpart shoulder at an end of the second drilling member. 
     
     
         24 . The drilling device according to  claim 23 , wherein the an external or internal counterpart shoulder is on an end of the second frame part. 
     
     
         25 . The drilling device according to  claim 23 , wherein the drilling organs comprise at least one of an integrated drilling part, separate drilling pieces, or bits. 
     
     
         26 . The drilling device according to  claim 23 , wherein the sleeve arrangement comprises a wear/slide ring comprising an essentially rigid structured material. 
     
     
         27 . The drilling device according to  claim 26 , wherein the wear/slide ring comprises at least one of metal, plastic, ceramic, or composite material. 
     
     
         28 . The drilling device according to  claim 26 , wherein wear/slide ring minimizes wear of the counterpart shoulders of the shoulder arrangement. 
     
     
         29 . The drilling device according to  claim 23 , wherein the sleeve arrangement comprises a flexion/damping ring comprising an essentially flexible structure. 
     
     
         30 . The drilling device according to  claim 29 , wherein the flexion/damping ring comprises at least one of rubber, plastic, or composite material. 
     
     
         31 . The drilling device according to  claim 29 , wherein the flexion/damping ring minimizes kinetic energy transmitted through the counterpart shoulders. 
     
     
         32 . The drilling device according to  claim 29 , wherein the flexion/damping ring minimizes hammering motion transmitted through the counterpart shoulders.