公开(公告)号：WO2022002911A1

公开(公告)日：2022-01-06

申请号：PCT/EP2021/067808

申请日：2021-06-29

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John

IPC: E21B17/02 ,  E21B17/042 ,  E21B17/0426

Abstract: A female portion to form part of a thread joint for a percussive drilling tool comprising a mounting sleeve having an axial end, wherein the mounting sleeve surrounds an internal cavity having an axial inner wall at the opposing end of the mounting sleeve compared to the axial end; wherein the mounting sleeve has at least one substantially cylindrical internally threaded section having a length L1, a thread entrance towards the axial end and a thread exit towards the axial inner wall; a thread clearance section positioned between the axial inner wall and the thread exit having a length L2 and a diameter D1; a guiding section positioned between the thread entrance and the axial end of the sleeve having a length, L3; characterized in that: 0 mm

公开(公告)号：WO2022043246A1

公开(公告)日：2022-03-03

申请号：PCT/EP2021/073237

申请日：2021-08-23

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John

IPC: E21B10/36 ,  E21B10/56 ,  E21B10/38

Abstract: A drill bit comprising a shank and drill bit head which are both centred on a longitudinal axis; wherein the drill bit head has a gauge and a front face with a peripheral edge which is adjacent to the gauge, the peripheral edge having a diameter D1, the area within the peripheral edge defining the total area of the front face; wherein the front face having a central island at its radially innermost section, a plurality of peripheral platforms at its the radially outermost section adjacent to the peripheral edge and a recessed section positioned radially between the central island and the peripheral platforms; wherein the central island and the peripheral platforms are axially raised in comparison to the recessed section; wherein a plurality of inner front inserts are positioned on the central island and at least one outer front insert is positioned on each of the peripheral platforms; characterized in that: the area of the recessed section is > 62% of the area of the total area of the front face.

公开(公告)号：WO2019170437A1

公开(公告)日：2019-09-12

申请号：PCT/EP2019/054455

申请日：2019-02-22

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John ,  NORMAN, Andreas

IPC: E21B17/042 ,  F16L15/06

Abstract: A connection for use in percussion drilling includes a male coupling and a female coupling. Each coupling includes a body and a respective screw thread formed on a respective inner or outer surface of the respective body. Each thread has a thread-form including a crest, a root, a contact flank and a non-contact flank. Each thread-form has a contact flank angle and a non-contact flank angle inclined relative to a respective baseline located at a respective minor or major diameter thereof. Each non-contact flank angle is greater than the respective contact flank angle. The crest of each thread-form is inclined from the respective contact flank to the respective non-contact flank such that an apex of the respective thread-form defining a respective minor or major diameter thereof is located adjacent to the respective non-contact flank.

公开(公告)号：WO2023088939A1

公开(公告)日：2023-05-25

申请号：PCT/EP2022/082078

申请日：2022-11-16

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John

IPC: E21B17/042

Abstract: A female portion to form part of a thread joint for a percussive drilling tool comprising: a mounting sleeve; wherein the mounting sleeve has at least one substantially cylindrical internally threaded section having a length, L1, a thread entrance towards an axial end and a thread exit towards the axial inner wall; wherein the threaded section has a thread form including crests, roots, contact flanks, and non-contact flanks, and having a pitch length, L4, between two axially neighbouring crests and an inner diameter, D2, radially between the roots; a thread clearance section positioned between the axial inner wall and the thread exit having a length L2 and a diameter D1; a guiding section positioned between the thread entrance and the axial end of the sleeve having a length, L3; characterized in that: the pitch length, L4, is between 12.8 – 14.5 mm.

公开(公告)号：WO2021004909A1

公开(公告)日：2021-01-14

申请号：PCT/EP2020/068753

申请日：2020-07-03

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John

IPC: E21B10/36

Abstract: The present invention relates to a drill bit (100) for percussion drilling comprising: a drill bit body (101) intended to extend along an axis A and comprising a front surface (105), said front surface comprises a first circular area (110) arranged transverse and coaxially to axis A, a second area surface (111) surrounding said first area surface (110), said second area surface (111) is extending in an angle α in relation to a plane transverse to axis A, and a third area surface (112) surrounding said second area surface (111), said third area surface (112) is extending in an angle β in relation to a plane transverse to axis A such that the front surface (105) will have a substantially convex shape; and a number (n) of buttons (200) arranged in said second area surface (111) and third area surface (112), said buttons (200) have a button body (201) extending along an axis B and a length L along axis B, said button body (201) has a circular cross-sectional shape transverse to axis B, a rear end surface (203) and a forward end surface (204), wherein the angle α is within the range of 5 -15°, the angle β is within the range of 30 - 45° and the buttons 200 are arranged in circular recesses (120) extending substantially transverse from the second surface (111) and third area surface (112) into the drill bit body (101), said recesses (120) have a radius corresponding to the button body radius (Rb) and a depth corresponding to 20 the length L of the button body (201) such that the button bodies (201) are fitted within the drill bit body (101) with the forward end surface (204) exposed in the second area surface (111) and third area surface (112).

公开(公告)号：WO2021069657A1

公开(公告)日：2021-04-15

申请号：PCT/EP2020/078402

申请日：2020-10-09

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John

IPC: E21B1/00 ,  E21B10/36 ,  E21B17/04 ,  E21B17/042

Abstract: A drilling assembly for percussive drilling, comprising at least two of a drill bit, a drill rod and a guide adapter; wherein the peripheral surface of the shoulder on the drill rod is at least partially encased in both radial and axial directions inside the mounting sleeve of the drill bit or the mounting sleeve of the guide adapter; and / or the peripheral surface of the shoulder on the guide adapter is at least partially encased in both radial and axial directions inside the mounting sleeve of the drill bit.

公开(公告)号：WO2020043504A1

公开(公告)日：2020-03-05

申请号：PCT/EP2019/071966

申请日：2019-08-15

Applicant: SANDVIK MINING AND CONSTRUCTION TOOLS AB

Inventor： HAMMARGREN, John ,  WICKSTRÖM, David

IPC: E21B10/38 ,  E21B10/60

Abstract: A percussive drill bit having a head and an axially rearward skirt. A plurality of ribs project radially outward at the skirt and define lengthwise extending channels. The ribs and channels, in the lengthwise direction are curved or angled to deviate from a longitudinal axis of the drill bit to facilitate rearward transport of fines and flushing fluid.