kelly bushing drilling manufacturer

Distributor and manufacturer of new and rebuilt oilfield drilling equipment & supplies including mud pumps and parts. Drilling equipment includes swivels, mud pumps, rotary table & draw works. Drilling supplies include tongs, roller chains, valves, drive bushings & rotary heads. Mud pump supplies include duplex & triplex liners & piston & pony rods. Pump parts include crossheads, slides & cranks. Catheads, washpipes, bearings, union pipes, pump heads, pipe nipples, crankshafts, roller chain sprockets & chain & pump drives are available. Capabilities include contractors" equipment repairing services. Drilling equipment & supplies are used in oilrigs.

The Kelly Drive Bushing acts as an adapter that serves to connect the rotary table to the Kelly. The Kelly bushing has an inside diameter profile that matches that of the Kelly, usually square or hexagonal. It is connected to the rotary table by four large steel pins that fit into mating holes in the rotary table. The rotary motion from the rotary table is transmitted to the bushing through the pins, and then to the kelly itself through the square or hexagonal flat surfaces between the Kelly and the Kelly drive bushing. The Kelly then turns the entire drillstring because it is screwed into the top of the drillstring itself.

As ARK Drilling our machine are avaible for both Mud and Air Drilling operations. Mud operations with Mud Pumps and Air Drilling operations with high pressure compressors. Our rigs hose lines desinged for high pressure of water&mud and air.

These 2 important is very important for drilling rig owner. After years when your machine needs maintenance you wont need our factory send you parts for maintenance. If you will have any trouble while drilling you will able to solve your problem easly finding spare parts at your local market and changing parts will be not complicated as Hydraulic system top drive drilling rigs.

Roller Kelly Bushings are designed and manufactured as per API Spec 7K "Drilling and Well Servicing Equipment" for driving Kelly in the drilling operation.

Roller kelly bushings are constructed in upper body half, low body half, rollers, rollers pin and etc., can be available in square drive or pin drive. Square drive roller kelly bushing designed with taper contact surface in low body half, while pin drive roller kelly bushing designed with pin to be installed in low body half.

According to torque of drilling, roller kelly bushing can be available in heavy duty, medium duty and light duty, heavy duty bushings are for high torque and high speed drilling operations while medium duty and light duty are for medium or shadow depth drilling operations.

Roller kelly bushings can accommodate square Kelly or hex Kelly, for square Kelly, the bushing is designed with four flat rollers, and for hex Kelly, the bushing is designed with two V-shaped rollers and two flat rollers. By changing roller size, roller kelly bushing can accommodate square Kelly from 2½" to 5¼" or hex Kelly from 3" to 6", and can be installed in rotary table range from 17½" to 37½".

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An adapter that serves to connect the rotary table to the kelly. The kelly bushing has an inside diameter profile that matches that of the kelly, usually square or hexagonal. It is connected to the rotary table by four large steel pins that fit into mating holes in the rotary table. The rotary motion from the rotary table is transmitted to the bushing through the pins, and then to the kelly itself through the square or hexagonal flat surfaces between the kelly and the kelly bushing. The kelly then turns the entire drillstring because it is screwed into the top of the drillstring itself. Depth measurements are commonly referenced to the KB, such as 8327 ft KB, meaning 8327 feet below the kelly bushing.

The JOTKB MODEL 27 PDHD OR 20 PDHD are developed for pin drive master bushing for rotary table sizes from 27-1/2" to 49-1/2" having 25-3/4" and 23" dia pin center. This unit is used for heavy duty drilling operations and high torque conditions on off shore as well as on shore drilling operations, and handle Kelly sizes from 3" to 6" Square or Hexagonal.

Kelly bushing is that elevated device positioned right on top of the rotary table and used to transmit torque from the rotary table to the kelly. The kelly bushing is designed to be the connection between the rotary table and the kelly. The kelly is a 4 or 6 sided steel pipe.

The purpose of the rotary table is to generate the rotary action (torque) and power necessary to rotate the drillstring and drill a well. The torque generated by the rotary table is useless if it is not transferred to the kelly (the drillstring is connected to the kelly).

Hence, through the kelly bushing the torque generated at the rotary table is transferred to the kelly. To achieve this connection, the inside profile of the kelly bushing matches the outer profile of the kelly so that the kelly fits or “sits” comfortably in the kelly bushing.

There are various designs for the kelly bushing including the split type, the pin-drive type and the square-drive type. Each of these designs has different ways in which they are connected and disconnected from the rotary table.

The internal diameter of the kelly bushing can be cut into the shape of a square (4-sided) or a hexagon (6-sided) depending on the outer shape of the kelly that will be used. The internals of a Kelly bushing is designed to resemble the outer shape of a Kelly just like the insides of a key lock is cut to exactly match the outer shape of the key.

The kelly bushing is not designed to hold tightly onto the Kelly; the kelly is still permitted to move up and down through the kelly bushing. This requirement is a must since drilling cannot progress if the kelly remains on a fixed spot. As the well is drilled deeper, the kelly also moves downward through the Kelly bushing.

The kelly bushing is sometimes used as a reference point from which depth measurements can be taken. All depths must be recorded with respect to a reference point; the kelly bushing (KB) is one of the depth references used in the oil and gas industry.

The top of the kelly bushing is normally used as the depth reference.For example, 7500ft KB means 7500ft below the kelly bushing or 7500ft measured from the top of the kelly bushing down to that point in the well.

In some other cases, depths could be recorded as 7500ft MDBKB meaning 7500ft measured depth below the kelly bushing. This is mostly used when the measured depth is different from the true vertical depth of the well, common with deviated and horizontal wells.

MASTER BUSHING AS SEMBLY Original Filed Jan. 4, 1967 United States Patent Int. Cl. F16d 3/06 US. Cl. 6423.5 17 Claims ABSTRACT OF THE DISCLOSURE An improved master bushing assembly capable of selectively driving either a pin drive kelly bushing or a square drive kelly bushing.

Master bushings presently in use in the well drilling industry are of two general types, namely: those which function to drive a square drive kelly bushing; and those which function to drive a pin drive kelly bushing. Although it is desirable to have both the square and pin type master bushings vailalble to the same rig concurrently, some operators cannot hear the expense involved in equipping themselves so fully. Additionally, if an operator does have both type master bushings available and drilling conditions dictate a desired change from a pin to a square drive kelly bushing or conversely, this necessitates the removal of the existing master bushing, for example a pin type, and inserting a square type in place thereof within the rotary table, thereby resulting in increased operation costs.

The present invention comprises a master bushing which, when used in conjunction with adapter means and/ or spacer means, permits selective use of a pin drive or square drive kelly bushing without the need to change the master bushing as is required with conventional master bushings.

FIG. 1 is a perspective view of a master bushing as,- sembly embodying one form of the present invention showing elements disassembled from one another;

FIG. 2 is a front elevational view partly in section of the embodiment illustrated in FIG. 1 showing certain of the elements thereof operatively assembled together with ments" thereof operatively assembled together with a rotary table and a square drive kelly bushing.

type master bushing assembly 10 comprising a master bushing 11 used in conjunction with a polygonal drive adapter, shown as a square drive adapter, insert 12 and a; pin drive type master bushing assembly 10" comprising the master bushing 11 used in conjunction with a pin drive spacing adapter insert 113. FIG. 2 shows master bushing assembly 10 arranged to be rotatably driven in a well known manner in a suitably rotatably driven rotary table 13 which rotary table is suitably supported by a rotary table frame 14. A polygonal drive, shown as a Patented Sept. 8, 1970 square drive, kelly bushing 15 engaging a swivel supported kelly 16 for rotation about its longitudinal axis while at the same time permitting relative vertical movement of the kelly 16 to advance a connected drill string downwardly within a well, is suitably received in the square drive adapter insert 12. A familiar stabbing skirt 17 extends downwardly from a downwardly extending centrally disposed square drive 42 fixed to the under surface of the main body portion 43 of the kelly bushing 15. The master bushing assembly 10 coacts with the kelly bushing 15 "for rotatably driving the kelly bushing 15.

The master bushing 11 includes a rigid tubular cylindrically externally shaped main body portion 25 complementary in external shape with and snugly received by lower portion 20 of rotary table 13. The inner opening 26 of body portion 25 is generally cylindrically shaped. A generally square shaped bevelled-corner flange 27 is fixed to the upper end portion of main body portion 25 and extends outwardly therefrom. Flange 27 has a generally flat horizontal upper surface 28 which, when master bushing -11 is interfitted with rotary table 13, is coplanar with the horizontal upper surface 23 of rotary table 13. Flange 27 also has a centrally disposed generally polygonal, as shown square, shaped recess 29, extending therewithin, which recess 29 has its center point coincident with the longitudinal axis of main body portion 25 and is greater in its side dimension than the diameter of inner opening 26, so that an annular shoulder 30 is defined between recess 29 and inner opening 26. The outer shape of flange 27 is complementary in shape with and snugly and non-rotatably received by the upper opening 21 of rotary table 13 such that the undersurface of flange 27 and shoulder 22 abut. The flange 27 has four longitudinally extending identical cylindrical openings 31 uniformly spaced at the corner portions of the flange 27 which receive the pin drive means (not shown) therein, of a pin drive kelly bushing (not shown) of a well known construction.

The square drive adapter insert 12 has a dual function of accommodating slips together with serving as the drive adapter means of the present invention, and includes a tubular cylindrically externally shaped lower portion 34 comprised of two identical semi-cylindrical bodies 35. The outer surface of lower portion 34 is complementary in shape to the inner opening 26 of body portion 25 of master bushing 11 and is removably received therein. Lower portion 34 has a frusto-conical downwardly tapering inner opening 36 suitably shaped for receiving slips. A generally square shaped bevelled-corner flange 37 comprised of two identical halves 38 is fixed to and extends outwardly from the upper end of lower portion 34. The outer shape of the sides of flange 37 is generally complementary in shape with that of the sides of recess 29 of main body portion 25 of master bushing 11, such that flange 37 is snugly and non-rotatably received in recess 29 with the upper surface of flange 37 being coplanar with the upper surface 28 of flange 27 of master bushing 11. Flange 37 has a centrally disposed longitudinally extending generally polygonal, shown as square, shaped opening 40 therewithin, which opening 40 has a side dimension greater than the major diameter of inner opening 36 of lower portion 34 so that an annular shoulder 41 is defined between opening 40 and inner opening 36. Square opening 40 of flange 37 is suitably sized to snugly removably receive the square drive portion 42 of kelly bushing 15.

The pin drive spacing insert 113 is used in combination with bushing 11 when a pin drive kelly bushing (not shown) of a well known construction, is rotatably driven by having the pin drive means (not shown) thereof received in openings 31 of flange 27. Insert 113 is dimensionally identical to the drive adapter insert 12 hereinabove described, with the exception that insert 113 has a differently shaped interior opening than insert 12, namely a frusto-conical downwardly tapering inner opening 32, which is suitably shaped for receiving a pin drive kelly bushing tapered guide skirt (not shown) of a well known construction therein. The exterior contact surfaces of inserts 12 and 113 are identical, therefore, no further description of insert 113 is believed necessary and it will be received within master bushing 11 in exactly the manner insert 12 is received as hereinabove described.

In addition, the principles of this invention taught by the embodiment hereinabove described and shown in FIGS. 1 through 3 may be applied to a master bushing which can be classified as an adapter receiving chamber, that is it, in itself, will have no drive provisions on the flange thereof, but will provide support for a square drive adapter insert or a pin drive adapter insert. The square drive adapter will be identical to insert 12 hereinabove described, however, the pin drive adapter will differ from insert 113 hereinabove described in that it will have drive pin receiving openings within the upper outwardly extending flange thereof. In this case the master bushing need not have the large flange that is required if the drive pin receiving openings were to be located therein.

FIGS. 4 and 5 represent another embodiment of a polygonal, shown as square, drive master bushing assembly of the present invention generally indicated at 65, which comprises a pin drive master bushing 11, of a construction well known in the art, and a pin drive to polygonal, shown as square, drive adapter insert means, generally indicated at 52, which converts the pin drive master bushing 11 to the square drive master bushing assembly 65.

Since certain elements as shown in FIGS. 4 and 5 are identical to those of FIGS. 1 through 3, the same reference characters will be applied to corresponding elements. Master bushing 11 is dimensionally identical to the master bushing 11 hereinabove described and illustrated in FIGS. 1 through 3, with the exception that master bushing 11" has a differently shaped interior opening Within the flange 27, namely a cylindrical opening 50". Additionally, as shown in FIGS. 4 and 5 the master bushing 11" is suitably arranged to be rotatably driven by the rotary table 13 suitably supported by the rotary table frame 14. The exterior contact surfaces of master bushings 11" and 11 are identical, therefore, no further description of master bushing 11" is believed necessary and it will be received within the rotary table 13 in exactly the manner master bushing 11 is received therein as hereinbefore described with reference to the embodiment of this invention illustrated in FIGS. 1 through 3.

The drive adapter means 52 includes an upper rigid flat plate portion 54 and an insert bowl portion 60 extending downwardly from the underside of plate portion 54. The plate portion 54 has a centrally disposed generally polygonal shaped, shown as square shaped, opening 55 therewithin and has external dimensions substantially the same as the dimensions of flange 27 of main body portion of master bushing 11". Square opening 55 is suitably sized and shaped, and plate portion 54 has a suitable thickness such that the square drive portion 42 of the square drive kelly bushing 15 will be snugly and non-rotatably received in square opening 55 as will be shown hereinafter.

Four cylindrically shaped pins 56 extends downwardly from and are rigidly fixed to the corner regions of the undersurface of plate portion 54 with the respective longitudinal centerlines of such pins 56 being substantially parallel with the vertical centerline of plate portion 54. Pins 56 have outer diameters substantially the same as the inner diameters of openings 31 in flange 27 of main body portion 25 of master bushing 11, with pins 56 having a longitudinal length to be received in openings 31 such that the undersurface of plate member 54 is flush with the upper surface 28- of flange 27.

Insert bowl portion 60 comprises a rigid cylindrically externally shaped body 62 being externally complementary shaped with and snugly removably received within the inner opening 26 of the main body 25 of master bushing 11". An outwardly extending generally cylindrically shaped flange 63 comprises the upper portion of body 62, which flange 63 is integral with and extends downwardly from the underside of plate portion 54. The flange 63 has an external shape complementary with the shape of recess 50 of flange 27 of main body portion 25 of master bushing 11", such that flange 63 is snugly received in recess 50. The inner opening 64 of body 62 is shaped in a frustoconical downwardly tapering manner for accommodating slips.

With plate portion 54 being mated with the master bushing 11" by interfitting pins 56 in openings 31 and insert bowl portion 60 into opening 26 the lower surface of the main body portion 43 of kelly bushing 15 will abut the upper surface of plate portion 54 and the square drive portion 42 of kelly bushing 15 will be snugly received in opening 55 with the lower surface of square drive portion 42 being coplanar with the upper surface 28 of flange 27.

Other embodiments more clearly illustrating the application of the principles of this invention are to be seen on pages 344 and 345 of Tools for Drilling, Producing, Fishing (68-69 catalogue) published by Baash-Ross Division of Joy Manufacturing Company, Houston, Tex. or equivalent pages shown on the composite catalogue of Oil Well Field Equipment and Services, 28th revision, published by World Oil.

1. A master bushing comprising: a body member having an opening extending therethrough and an outer configuration of a form that said body member is closely and non-rotatively received within the central opening of a given rotary drilling table with the axes of said openings being coincident; said opening in said body member being of a form to non-rotatively receive an adapter insert completely therein; said body member being partially in the form of an outwardly extending flange portion at the end thereof last receivable within such a central opening; and said flange portion having a plurality of parallel externally accessible open bores of a size and orientation to receive the pins of a known pin drive kelly bushing therein.

2. A master bushing as specified in claim 1 having a spacing adapter inserted in said opening in said body member, said insert comprising: a member having an outwardly extending flange portion at the end thereof last receivable within said opening in said body member; said member having a downwardly depending bowl portion; and said member having a circular central opening extending therethrough for the guiding and centerin of a known pin drive kelly bushing.

4. A master bushing as specified in claim 1 having a driving adapter inserted in said opening in said body member, said insert comprising: a member having an outwardly extending flange portion at the end thereof last receivable within said opening in said body member; and said member having a central polygonal cross-sectional opening at the upper end thereof of a size and orientation to non-rotatively receive a drive portion of a known polygonal drive kelly bushing.

7. A master bushing assembly comprising: a body member having an opening extending therethrough and an outer configuration of a form that said body member is closely and non-rotatively received within the central opening of a given rotary drilling table with the axes of said openings being coincident; a driving adapter insert having an outer configuration of a form that said insert is non-rotatively received within said opening extending through said body member; and said insert having a central polygonal cross-sectional opening at the upper end thereof of a size and orientation to non-rotatively receive a drive portion of a known polygonal drive kelly bushing.

8. A drive adapter for downward insertion into a pin drive kelly bushing wherein said adapter comprises: a body member having an opening extending centrally therethrough, said body having a lower portion with an external configuration coaxial with said opening and complementary and slidably receivable in an insert bowl passageway of a known pin drive master bushing, said opening having a configuration at the upper end thereof for receiving the square drive portion of a square drive kelly bushing and a configuration extending downwardly from said upper end thereof for receiving slip member; and drive pins for drivingly cooperating with said known pin drive master bushing and said body member.

9. A master bushing assembly comprising a drive adapter as specified in claim 8 in combination with a pin drive master bushing wherein said main body upper end surface becomes coplanar with the upper surface of said master bushing upon being so inserted.

10. A master bushing assembly comprising: a master bushing having means for accommodating a selected one of a pin drive insert and a square drive insert therein in combination with said selected one of said inserts providing for driving connection to a kelly drive bushing.

11. A master bushing assembly as specified in claim 10 wherein said master bushing has an upwardly open through bore with a top portion of polygonal internal cross section.

12. A master bushing assembly as specified in claim 11 wherein said selected one of said inserts is a pin drive spacing insert having a top external profile of mating polygonal cross section with said through bore top portion.

13. A master bushing assembly as specified in claim 11 wherein said selected one of said inserts is a polygonal drive adapter insert having a top external profile of mating polygonal cross section with said through bore top portion and an upwardly open central recess of polygonal cross section mateable with a known polygonal drive kelly bushing.

15. An adapter insert for a pin drive master bushing, said adapter insert having drive pins thereon for drivingly mating with a known pin drive master bushing and said adapter having an internal upwardly open recess of polygonal cross section mateable with the polygonal drive portion of a known polygonal drive kelly bushing.

16. A master bushing assembly comprising: a pin drive master bushing in combination with an adapter insert as specified in claim 15 for prividing driving connection between rotary drilling table and a polygonal drive kelly bushing.