Gotco-usa

SECTION 5 - MILLING TOOLS & WASHOVER EQUIP.

GOTCO INTERNATIONAL, INC.

OPERATION & MAINTENANCE

MANUAL

TABLE OF CONTENTS MILLING TECHNIQUES-----------------------PAGE 2 Introduction 2Circulation Requirements 2Rates & Speeds 2Jars 2Spudding 3Junk Milling 3Liner Milling 3Casing Milling 3Washpipe Milling 3Drill Pipe & Drill Collar Milling 3Taper Milling 3Collapsed Casing 4Whipstock Windows 4Tungsten Carbide Dressing 4JUNK MILLS----------------------------------PAGE 5 Illustrations 5-7

General Description 8 Use 8 Construction 8 Flat Bottom Mill 8 Combination Mill 8 Skirted Junk Mill 8 Top Sub 8 Skirt 8 Tapered Mills 9 How To Order 9-10 BOOT BASKET (JUNK SUBS)------------PAGE 11 Illustrations 11-12 General Description 11 Use And Operation 11 Construction 11 Options 11 Maintenance 11 How To Order 11, 13 WASHPIPE------------------------------------PAGE 14 Illustrations 14 General Description 14 How To Order 14-15 WASHOVER SAFETY JOINT------------PAGE 16 Illustrations 16 General Description 16 Construction 16 Assembly 16 Operation 16 How To Order 16 LIFT PLUG------------------------------------PAGE 17 Illustrations 17 General Description 17 Elevator Lift Subs 17 How To Order 17 DRIVE SUB------------------------------------PAGE 18 Illustrations 18 General Description 18 Construction 18 How To Order 18 ROTARY SHOES----------------------------PAGE 19 Illustrations 19-21 General Description 19 How To Order 22

PHONE 281-5911874, or 1-800-OVERSHOT (683-7746), or FAX 281-999-4251 5-1

SECTION 5 - MILLING TECHNIQUES

MILLING TECHNIQUES INTRODUCTION Recovery of equipment from the hole due to the shortages of pipe and related drilling material has generated a large interest in milling techniques during the past couple of years. The vast array of mills available from different suppliers plus the manufacture of these mills from heat-treated alloy bar-stock has made it possible for the operators and drilling contractors to do work with the mills that in previous years has been impossible. Manufacturing the mill from heat-treated bar-stock allows the operator to use the mill economically because of two major factors:

1. It is possible to re-machine the threads in case of

thread wear. 2. It is possible to redress the mill with sintered

tungsten carbide thus prolonging service life. It is extremely important that the tungsten carbide be of good quality and the technique of application be done by qualified personnel.

In the following sections, we will not attempt to offer techniques for all the various mills. We shall limit this discussion to techniques to be used with three common milling tools; i.e., the junk mill, the taper mill, etc... Prior to going into specific operating techniques for the mills, there are several points that should be discussed that apply to all mills. CIRCULATION REQUIREMENTS It is extremely important to remove mill cuttings from the hole; therefore, the highest circulation rate possible should be used, bearing in mind the circulation rate should be limited so that the formation is not damaged. A minimum annular velocity of 120'/minute is recommended. If it is not possible to maintain this minimum annular velocity, bit baskets (junk baskets) should be used directly above the mill to efficiently remove the cuttings. The most efficient surface removal system for cuttings should be utilized; thereby, guaranteeing that the cuttings are not re-circulated in the hole. When an efficient cuttings removal system is not being used, there will be a build-up of cuttings on bottom, and it will be noted that the milling rate drops

off. When this occurs, periodic use of junk snatchers or bailers is necessitated. It is extremely important that the ID's of all substitutes and auxiliary equipment in the string be known. This allows the operator to know if there is a restriction in the string which may cause fluid volume problems. RATES AND SPEEDS Maintaining a constant milling rate is extremely important, because it does not allow the milling tool to drill off; thus, achieving the best penetration rate. Allowing the drum to creep rather than turn in large increments allows the weight to be gradually fed, further improving penetration rate. On particularly long milling jobs, periodic inspection of the mill will give a pretty good indication of how this particular design of mill is functioning downhole. Excessive rate will allow the mill to flare the top of the fish rather than mill the fish. The mill blades should have a hook wear pattern, indicating efficient operation. The mill should never be started directly on the fish. The rotary should be engaged with the mill one or two feet above the fish and then lowered on the fish. Penetration may then be improved by increasing the speed and weight. To even out the wear on the mill, it is best to develop a new wear pattern by picking the mill up from time to time and lowering it on the fish while rotating. If the mill is operating on the fish for a long period, a deep wear pattern will develop, and there is an excellent possibility that the mill will work-harden. During milling operations, an increase in torque could mean that a sliver of junk is lodged alongside the mill. This circumstance happens quite commonly during junk milling. The mill should be spudded several times, allowing the sliver to drop to the bottom. JARS It is important that the most efficient flow be maintained so the cuttings can be circulated efficiently out of the hole. Using jars during the milling operation is not recommended, because the flow through the jars is restricted. The jars also make it difficult to accurately control the weight on the fish.

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SPUDDING (Optional Operation) When a junk mill is being used, an extremely efficient technique called spudding may be utilized. Many times the junk in the bottom of a hole will rotate with the mill; thus, decreasing the efficiency of milling. By spudding, the junk is pounded into the bottom of the hole and is held in place while it is being milled. This action also tends to sharpen the mill. To spud on loose junk, first determine the zero or neutral point of weight on the fish. When the neutral point is determined, the kelly should be marked at the top of the kelly bushing. The kelly should then be picked up from 4-6', depending on the depth of the hole. In shallow holes, the pick-up should be 4'. The kelly should be dropped and then caught with the brake about 18-20" above the zero mark. When the string is caught, it stretches, and a large force is transmitted to the bottom. The string should be spudded three or four times with a quarter turn between drops. A word of caution is appropriate here - as stated previously, a junk basket should be utilized just above the mill. Spudding should be done with a junk basket strong enough to take this arduous treatment. If possible, use a junk basket with a neck O.D. of 4-3/4" or more. The preceding technique may be used in both open hole fishing and cased hole fishing. It is recommended that if the fishing operation is inside casing, the severity of this spudding be decreased. JUNK MILLING A junk mill that is to be used in open hole should have a diameter of 1/8-1/4" less than the hole diameter. If the junk mill is going to be used inside casing, the mill head OD should be 1/8" under the drift diameter of the casing. To prevent casing damage, wear pads with an outside diameter 1/16" smaller than the mill head outside diameter should be used. This prevents casing damage during milling. If possible, add 10,000 lb. of drill collars above the mill. Run in the hole, feel the bottom and then spud the junk. When back on bottom, start milling at 80-100 RPM with the pump circulating for normal drilling. Pick up the string after penetrating 1-2', allowing the loose junk to fall to the bottom. To accomplish this, pick up the mill 15-20' off bottom, reducing or shutting off the pump for two minutes. Spud several times, bottom the mill and resume milling with 4,000-12,000 lb. of weight at 100-125 RPM at normal pump pressure.

Ideally, it would take 5-6' of hole to mill up the junk in hard formation; however, soft formations may require 10-15' of hole due to the junk penetrating the formation. Junk Mills are extremely effective in milling up alloy-steel packers, squeeze tools, perforating guns, drill pipe and tool joints, reamers and reamer blades, and rock bits. The mills are available in concave, convex or flat bottom designs. It is recommended that the mill be purchased with a fishing neck long enough to be engaged with an overshot. LINER MILLING The outside diameter of the mill should be just over the outside diameter of the coupling. If the liner is hung by a hanger or adapter, the junk mill should be used first, followed by the liner. CASING MILLING Sizing for milling should be identical to sizing for liner milling. Use 4,000-6,000 lb. of weight and a speed of 125 RPM for J-55 and N-80 Casing. For P-110 Casing, heavier weight should be utilized. When milling in open hole, and the open hole diameter is less than the blade O.D., or if the casing is surrounded by a hard cement sheath, more weight will be needed to drill the cement or formation. WASHPIPE MILLING The preceding techniques should be used for washpipe milling, unless there is drill pipe or drill collars inside the washpipe. In this case, the drill pipe and drill collars should be milled with a junk mill prior to utilizing the mill. DRILL PIPE AND DRILL COLLAR MILLING A specially designed mill with heavier blades should be used on drill pipe and drill collars. TAPER MILLING The design of the taper mill allows the small-diameter lower-mill end to enter the collapsed section and then the slightly spiraled reamer edges mill away the undersized section to the full diameter. The taper mill

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may also be used to clean whipstock windows and to deburr casing. Initial table speed should be 50 RPM with a milling weight of between 2,000-3,000 lb. As in all milling operations, the weight to be utilized is reliant on the torque encountered. If the torque is high, the speed and weight should be reduced until the mill turns freely. COLLAPSED CASING The diameter of the collapsed interval should be determined by running an impression block. The most effective technique to use in badly collapsed casing is known as stage milling. This is accomplished by utilizing various sized taper mills to bring the collapsed section back to I.D. in stages. The initial taper mill should be 1/4" larger diameter at the largest part than the minimum I.D. of the collapsed section. This type of stage milling eliminates side-tracking. Another method to eliminate side-tracking is utilizing a string taper mill. This taper mill has a connection for pipe on the bottom of the mill so that the pipe can be guided into the I.D. of the fish; thus, eliminating side-tracking. Obviously, this is not possible if the casing is collapsed to a point of not allowing any size pipe to enter. WHIPSTOCK WINDOWS Many times taper mills are used to clean up whipstock windows. Run the taper mill into the hole within 5' of the top of the window. With rotation at about 40 RPM and weight under 1,000 lb., run the mill down the full length of the face of the whipstock. This procedure should be repeated several times to clean the rough edges. TUNGSTEN CARBIDE REDRESSING As mentioned previously, the entire success of the milling operation is reliant on the type of tungsten carbide used and the technique of application. The tungsten carbide hard-surfacing material is available in welding rod form. The tungsten carbide fragments are interspersed in a matrix of special metal which acts as a sort of shock absorber yet is still strong enough to hold together under severe loading. The matrix is designed so that it wears away in service, exposing new carbide fragments as the tool is used.

The following techniques should be used in applying tungsten carbide: 1. All rust, scale or paint should be cleaned from the

work surface and the work surface brightened to parent metal.

2. The work surface should be preheated to 850 F. 3. A procedure should be followed similar to

working with bronze. When applying tungsten carbide rod to the working surface, use a brazing flux, being careful not to overheat the filler metal. Also be extremely cautious that the cone of the torch does not touch the tungsten carbide rod or work surface, because this will cause surface oxidation, preventing a solid bond between the carbide particle and the parent metal.

4. High alloy steels begin to scale when they are heated above 2,000F. (A bright cherry-red color); therefore, it is imperative that the parent metal be kept below this temperature.

5. The surface to be covered should be pre-tinned with filler rod before application of the tungsten carbide. A filler rod should be used to fill up the voids or low spots between the carbide particles as the rod is applied. The extra filler rod holds the carbide in place, preventing a porous structure. Utilize 1 lb. of filler rod to 3 lb. of tungsten carbide rod.

6. Carbon blocks may be used to help form special shapes and also prevent the loss of matrix.

7. In thin wall sections such as rotary shoes, the side opposite that being worked should not be heated to a point that it becomes oxidized.

8. Melting of the matrix occurs above 3,000F and when reworking a tool, it is important that you do not burn the matrix during the removal of the broken carbide particles. Should burning occur, you must remove that portion of the tungsten affected.

9. It is important that the same particle size tungsten carbide be used as was used in the original application.

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SECTION 5 - JUNK MILLS

Offset

Concave

Flat Bottom

5-5


Combination

Bladed

Round Nose

5-6


Tapered

Pilot

Skirted

Shown in section to reveal internal details

5-7


JUNK MILLS GENERAL DESCRIPTION Gotco Junk Mills are produced from high strength heat treated alloy. All mills are available as bit type or with optional fishing neck and hard surface wear pads. Large circulation ports and ample fluid channels provide cooling and efficient removal of cuttings. Gotco Mills are dressed with super tough crushed, sintered tungsten carbide. For those customers who prefer to dress their own mills, Gotco offers the complete line of mills without carbide dressing at a substantial savings. To further increase the versatility of Gotco mills, the API connection can be left blank as well. Gotco Mills are available in standard sizes as well as special orders in any length or diameter. USE Rugged Gotco Junk Mills make any milling job easy, even when cutting the toughest fish such as alloy-steel packers, squeeze tools, perforating guns, drill pipe, tool joints, reamers, reamer blades, and rock bits. Gotco Junk Mills are available with concave, bladed, or flat bottoms in various combinations of fishing necks and stabilizers. Any specific length neck, stabilizer, or combination of both may also be ordered. Available in ODs from 1-3/4 to 22 inches with 3 to 8 blades in 10 to 64 inch lengths with bladed, concave, flat bottom, or offset design. Gotco Junk Mills are also offered with a skirt as an option. CONSTRUCTION Gotco Junk Mills are manufactured from rugged high strength alloy steels specifically designed to provide maximum performance during such demanding operations as milling. The sintered tungsten carbide dressing which is applied to the face of the junk mill is the same high quality material used in all Gotco junk mills. The hard metal overlays used on the skirt teeth assure maximum wear resistance while minimizing the possibility of damage to the casing I.D.

FLAT BOTTOM MILLS The mill is a flat bottomed junk mill dressed with sintered tungsten carbide on the face. A standard rotary shoulder pin connection is provided for making up to the lower end of the top sub. Thus the mill is located in a recessed position inside the skirt. Tooth type and concave junk mills are also available at extra cost. COMBINATION MILLS The Gotco Combination Mill is used to mill cement and small junk items. Some applications include the milling of bridge plugs, under-reamer arms, reamer blades, slips and other small items that are lost in the well. The large relief angle allows for superior penetration. The predominant feature of this mill is that one mill tooth extends to the center of the mill in order to prevent coring. SKIRTED JUNK MILLS The Gotco Skirted Mill is a three piece assembly used to mill junk or tubular inside casing. The assembly consists of a top sub, skirt, and flat bottom junk mill. An optional bladed type junk mill is also available. The mill and skirt are both made up to the lower end of the top sub. The skirt surrounds the mill and extends suitably beyond the mill face to act as a guide and centralizer for the junk to be milled. The skirt has hard metal ribs to increase wear resistance but does not contain any carbide which could damage the casing. The carbide dressing on the mill face will assure fast efficient milling while the skirt protects the casing from the milling operation TOP SUB The top sub is provided with standard rotary shoulder pin connection up with neck length suitable for conventional handling tools. SKIRT The skirt makes up to the top sub and acts as a control mechanism to contain the fish, assuring it remains adequately, centered to provide for extremely efficient milling operations. The standard skirt is a tooth type dressed with a wear resistant hard metal. The skirt is also available with a variety of tooth styles and dressings.

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TAPERED MILLS The Gotco Taper Mill is used to establish gage diameter. It is used primarily to mill collapsed casing. Also it may be used in conjunction with other mills to prepare a fish for internal engagement. Another useful application is deburring the window after a whipstock operation is completed. Tapered mills come in three common configurations. 1. The 60 degree mill has an included taper of 60

degrees (30 degrees per side). 2. The 30 degree mill has an included taper of 30

degrees (15 degrees per side). 3. The 15 degree mill has an included taper of 15

degrees (7-1/2 degrees per side). ORDERING INSTRUCTIONS When Ordering Please Specify: 1) Name and Number of Mill. 2) O.D. of Mill.

3) Top Connection if Other than Standard. 4) Specify if Fishing Neck and wear pads are

desired Recommended For Redressing Mills: Junk Mills can be sent back for redressing the carbide milling surfaces provided the tool is in good working condition. Contact our sales representatives for information. JUNK MILLS: When ordering. please include the bottom

configuration, connection, outside diameter, and style of dressing.

COMBINATION MILLS: When ordering, please include connection,

outside diameter, and style of dressing. TAPERED MILLS: When ordering, please include connection, taper range, and style of dressing.

GOTCO MILLING TOOLS MILL SIZE (O.D.) 2-1/4 - 2-1/2 2-5/8 - 2-3/4 2-7/8 - 3-1/8 3-1/4 - 3-5/8 3-3/4 - 4-1/4 4-3/8 - 4-1/2 4-5/8 - 4-3/4 4-7/8 - 5 TOP CONNECTION-PIN

1-13/16 WILS. FJ

1-1/4 REG

1-1/4 REG

2-3/8 REG

2-3/8 REG

2-7/8 REG

2-7/8 REG

2-7/8 REG

JUNK MILL (1) PART# XREF#

JM-1 41618

JM-2 41621

JM-3 41623

JM-4 41626

JM-5 41630

JM-6 41635

JM-7 41635

JM-8 41635


JMB-1 41618

JMB-2 41621

JMB-3 41623

JMB-4 41626

JMB-5 41630

JMB-6 41635

JMB-7 41635

JMB-8 41635

ROUND NOSE MILL (60 INCL. ANGLE)

PART# XREF#

RM-1 41918

RM-2 41921

RM-3 41923

RM-4 41926

RM-5 41930

RM-6 41935

RM-7 41935

RM-8 41935

TAPER MILL (30 INCL. ANGLE)

PART# XREF#

TM-5 41999

TM-6 42000

TM-7 42000

TM-8 42000

SKIRTED JUNK MILL PART# XREF#

SJM-5 41999

SJM-6 42000

SJM-7 42000

SJM-8 42000

FISHING NECK O.D. 3-1/8" 3-3/4" 3-3/4" 3-3/4"

GOTCO MILLING TOOLS (CONTINUED) MILL SIZE (O.D.) 5-1/8 - 5-1/4 5-3/8 - 5-1/2 5-5/8 - 5-3/4 5-7/8 - 6 6-1/8 - 6-1/4 6-3/8 - 6-1/2 6-5/8 - 6-3/4 6-7/8 - 7 TOP CONNECTION-PIN

3-1/2 REG

3-1/2 REG

3-1/2 REG

3-1/2 REG

3-1/2 REG

3-1/2 REG

3-1/2 REG

3-1/2 REG


JM-9 41641

JM-10 41641

JM-11 41641

JM-12 41647

JM-13 41647

JM-14 41647

JM-15 41653

JM-16 41653


JMB-9 41641

JMB-10 41641

JMB-11 41641

JMB-12 41647

JMB-13 41647

JMB-14 41647

JMB-15 41653

JMB-16 41653


PART# XREF#

RM-9 41941

RM-10 41941

RM-11 41941

RM-12 41947

RM-13 41947

RM-14 41947

RM-15 41953

RM-16 41953


PART# XREF#

TM-9 42001

TM-10 42001

TM-11 42001

TM-12 42002

TM-13 42002

TM-14 42002

TM-15 42003

TM-16 42003


SJM-9 42001

SJM-10 42001

SJM-11 42001

SJM-12 42002

SJM-13 42002

SJM-14 42002

SJM-15 42003

SJM-16 42003

FISHING NECK O.D. 4-1/4" 4-1/4" 4-1/4" 4-1/4" 4-1/4" 4-1/4" 4-1/4" 4-1/4"

1) Flat Bottm, Concave or offset 2) Standard Bladed or Combination

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GOTCO MILL TOOLS (CONTINUED) MILL SIZE (O.D.) 7-1/8 - 7-1/4 7-3/8 - 7-1/2 7-5/8 - 7-3/4 7-7/8 - 8 8-1/8 - 8-1/4 8-3/8 - 8-1/2 8-5/8 - 8-3/4 8-7/8 - 9 TOP CONNECTION-PIN

3-1/2 REG

4-1/2 REG

4-1/2 REG

4-1/2 REG

4-1/2 REG

4-1/2 REG

4-1/2 REG

4-1/2 REG


JM-17 41653

JM-18 41659

JM-19 41659

JM-20 41659

JM-21 41665

JM-22 41665

JM-23 41665

JM-24 41671


JMB-17 41653

JMB-18 41659

JMB-19 41659

JMB-20 41659

JMB-21 41665

JMB-22 41665

JMB-23 41665

JMB-24 41671


PART# XREF#

RM-17 41953

RM-18 41959

RM-19 41959

RM-20 41959

RM-21 41965

RM-22 41965

RM-23 41965

RM-24 41971


PART# XREF#

TM-17 42003

TM-18 42004

TM-19 42004

TM-20 42004

TM-21 42005

TM-22 42005

TM-23 42005

TM-24 42006


SJM-17 42003

SJM-18 42004

SJM-19 42004

SJM-20 42004

SJM-21 42005

SJM-22 42005

SJM-23 42005

SJM-24 42006

FISHING NECK O.D. 4-1/4" 5-3/4" 5-3/4" 5-3/4" 5-3/4" 5-3/4" 5-3/4" 5-3/4"

GOTCO MILL TOOLS (CONTINUED) MILL SIZE (O.D.) 9-1/8 - 9-1/4 9-3/8 - 9-1/2 9-5/8 - 9-3/4 9-7/8 - 10 10-1/8 - 10-1/4 10-3/8 - 10-1/2 10-5/8 - 10-3/4TOP CONNECTION-PIN

4-1/2 REG

4-1/2 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG


JM-25 41671

JM-26 41671

JM-27 41677

JM-28 41677

JM-29 41677

JM-30 41683

JM-31 41683


JMB-25 41671

JMB-26 41671

JMB-27 41677

JMB-28 41677

JMB-29 41677

JMB-30 41683

JMB-31 41683


PART# XREF#

RM-25 41971

RM-26 41971

RM-27 41977

RM-28 41977

RM-29 41977

RM-30 41983

RM-31 41983


PART# XREF#

TM-25 42006

TM-26 42006

TM-27 42007

TM-28 42007

TM-29 42007

TM-30 42008

TM-31 42008

SKIRTED JUNK MILL

PART# XREF#

SJM-25 42006

SJM-26 42006

SJM-27 42007

SJM-28 42007

SJM-29 42007

SJM-30 42008

SJM-31 42008

FISHING NECK O.D. 5-3/4" 5-3/4" 7-3/4" 7-3/4" 7-3/4" 7-3/4" 7-3/4"

GOTCO MILLING TOOLS (CONTINUED) MILL SIZE (O.D.) 10-7/8 - 11 11-1/8 - 11-1/4 11-3/8 - 11-1/2 11-5/8 - 11-3/4 11-7/8 - 12 12-1/8 - 12-1/4 12-3/8 - 12-1/2TOP CONNECTION-PIN

6-5/8 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG

6-5/8 REG


JM-32 41683

JM-33 41689

JM-34 41689

JM-35 41689

JM-36 41695

JM-37 41695

JM-38 41695


JMB-32 41683

JMB-33 41689

JMB-34 41689

JMB-35 41689

JMB-36 41695

JMB-37 41695

JMB-38 41695


PART# XREF#

RM-32 41983

RM-33 41989

RM-34 41989

RM-35 41989

RM-36 41995

RM-37 41995

RM-38 41995


PART# XREF#

TM-32 42008

TM-33 42009

TM-34 42009

TM-35 42009

TM-36 42010

TM-37 42010

TM-38 42010

SKIRTED JUNK MILL

PART# XREF#

SJM-32 42008

SJM-33 42009

SJM-34 42009

SJM-35 42009

SJM-36 42010

SJM-37 42010

SJM-38 42010

FISHING NECK O.D. 7-3/4" 7-3/4" 7-3/4" 7-3/4" 7-3/4" 7-3/4" 7-3/4" 1) Flat Bottm, Concave or offset 2) Standard Bladed or Combination Larger sizes are available upon request.

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SECTION 5 - BOOT BASKETS (JUNK SUBS)

BOOT BASKET (JUNK SUBS) GENERAL DESCRIPTION The Gotco Boot Basket is designed to aid in the removal of cuttings and other suspended particles that circulate up from the bottom of the hole during milling and fishing operations. USE AND OPERATION Gotco Boot Baskets are positioned in the string just above the milling tool. Circulation during the milling operation flushes cuttings up the annulus. Design of the Boot Basket creates higher velocity fluid flow upwards to the top of the cup. The fluid velocity then decreases at the top of the cup allowing suspended particles to drop into the cup thus preventing their accumulation on the bottom of the hole. CONSTRUCTION Gotco Boot Baskets are manufactured from alloy steels and hardened to provide maximum strength and wear resistance. The standard Boot Basket consists of a drill collar type sub with pin connection up and box connection down. Connections are gaged to API specification 7 to assure proper make-up in your string. The cup is welded to the sub. Gussets give strength to the cup and act as guides to assist in withdrawing the tool through tight spaces while tripping out. OPTIONS Standard Boot Baskets are provided with welded cup. At the customer's request the cup can be manufactured as a removable unit. Drain holes can also be added. Tools with extra long cups are also available and hard faced pads can be applied for tools used inside casing. Pads should be dressed to the same OD as the mill being run below the Boot Basket. MAINTENANCE The only maintenance required is thorough cleaning after each use and protection of the connections with dope and thread protectors. Always repaint the tool to minimize deterioration while in storage.

ORDERING INSTRUCTIONS When Ordering Please Specify: 1) Name and Number of Assembly 2) Connection Size and Type if other than Standard 3) If a removable cup is desired, please specify.

Note: Unless otherwise specified, removable cup assemblies are not supplied with gussets between the cup and the mandrel body under the cup.

Mandrel

Gusset

Cup

Boot Basket Assembly

5-11

SECTION 5 - BOOT BASKET (JUNK SUBS) TERMINOLOGY

Cup Lengths Part # Cup Lengths BB 10 BBL 20 BBXL 30

Cup Length (See Table)

Bore Diameter

Top Tool Joint Connection

Body Under Cup

Cup I.D.

Cup O.D.

Bottom Tool Joint Connection

Standard Boot Basket Assembly.

5-12

SECTION 5 - BOOT BASKETS (JUNK SUBS)

GOTCO BOOT BASKET (JUNK SUBS) HOLE SIZE 4-1/4 TO 4-5/8 4-5/8 TO 4-7/8 5-1/8 TO 5-7/8 6 TO 6-3/8 6-1/2 TO 7-1/2 STANDARD A.P.I. TOP CONNECTION

2-3/8 REG

2-7/8 REG

3-1/2 REG

3-1/2 REG

3-1/2 REG

BODY O.D. (TOP CONNECTION)

3-1/8

3-3/4

4-1/4

4-1/4

4-1/4

BODY O.D. (UNDER CUP)

2

2-5/8

3-1/8

3-1/4

3-1/4

CUP O.D. 3-11/16 4 4-1/2 5 5-1/2 CUP I.D. 3-5/16 3-5/8 4-1/4 4-9/16 4-7/8 DIA. OF BORE 3/4 1-1/4 1-1/2 1-1/2 1-1/2

STANDARD TYPE COMPLETE ASSEMBLY

PART# XREF#

BB-1 20340

BB-2 15450

BB-3 15455

BB-4 15460

BB-5 15465

LENGTH OF CUP 10 10 10 10 10 TOTAL LENGTH 29 29-1/2 30-1/2 30-1/2 30-1/2

LONG TYPE COMPLETE ASSEMBLY

PART# XREF#

BBL-1 20345

BBL-2 17060

BBL-3 17065

BBL-4 17070

BBL-5 17075

LENGTH OF CUP 20 20 20 20 20 TOTAL LENGTH 43-1/2 44 45 45 45

EXTRA LONG TYPE COMPLETE ASSEMBLY

PART# XREF#

BBXL-1 20295

BBXL-2 20300

BBXL-3 20305

BBXL-4 20310

BBXL-5 20315

LENGTH OF CUP 30 30 30 30 30 TOTAL LENGTH 53-1/2 54 55 55 55

GOTCO BOOT BASKET (JUNK SUBS) (CONTINUED) HOLE SIZE 7-1/2 TO 8-1/2 8-5/8 TO 9-5/8 9-5/8 TO 11-3/8 11-1/2 TO 13 14-3/4 - 17-1/2 STANDARD A.P.I. TOP CONNECTION

4-1/2 API

4-1/2 API

6-5/8 API

6-5/8 API

7-5/8 API

BODY O.D. (TOP CONNECTION)

5-1/2

5-1/2

7-3/4

7-3/4

BODY O.D. (UNDER CUP)

4-1/2

4-1/2

5-3/4

5-3/4

CUP O.D. 6-5/8 7 8-5/8 9-5/8 12-7/8 CUP I.D. 5-15/16 6-9/32 7-15/16 8-17/32 11-5/8 DIA. OF BORE 2-1/4 2-1/4 3-1/2 3-1/2 4

STANDARD TYPE COMPLETE ASSEMBLY

PART# XREF#

BB-6 15470

BB-7 15475

BB-8 15480

BB-9 15485

BB-10 55306

LENGTH OF CUP 10 10 10 10 10 TOTAL LENGTH 31-1/2 31-1/2 33 33 36

LONG TYPE COMPLETE ASSEMBLY

PART# XREF#

BBL-6 17080

BBL-7 17085

BBL-8 17090

BBL-9 17095

LENGTH OF CUP 20 20 20 20 TOTAL LENGTH 46 46 48 48

EXTRA LONG TYPE COMPLETE ASSEMBLY

PART# XREF#

BBXL-6 20320

BBXL-7 20325

BBXL-8 20330

BBXL-9 20335

LENGTH OF CUP 30 30 30 30 TOTAL LENGTH 56 56 58 58

Note: other sizes are available upon request. For further information, contact our sales representatives.

5-13

SECTION 5 - WASHOVER EQUIPMENT (MILLING OPERATIONS)

WASHOVER EQUIPMENT WASHPIPE GENERAL DESCRIPTION Gotco offers one of the largest selections of washover tubulars in the industry. All Gotco washover pipe has a two-step, double-shouldered thread joint wiht flush outside and inside diameters. This buttress-type thread assures quick makeup and high torsional strength. A wide assortment of sizes are available ranging in outside diameters from 3-1/2 to 20 inches. Consult the table for available sizes and washover string design considerations.

ORDERING INSTRUCTIONS When Ordering Please Specify: 1) O.D., weight, grade, and range 2) Number of joints required

Washpipe

5-14

SECTION 5 - WASHOVER EQUIPMENT (CASING SIZE & WEIGHT TABLES)

SIZE WEIGHT I.D. WALL JOINT YIELD MIN. HOLE SIZE MAX FISH O.D. 3-1/2 9.2 2.992 .254 3,000 3-1/4 2-11/16 3-3/4 9.5 3.25 .250 3,000 4-1/8 2-7/8

4 11.0 3.476 .262 3,500 4-1/2 3 4 11.6 3.428 .286 4,000 4-1/2 3-1/16 4 14.0 3.340 .330 5,000 4-1/2 3 4 15.7 3.240 .380 6,000 4-1/2 2-7/8

4-1/2 13.5 3.920 .290 5,000 4-3/4 3-1/2 4-1/2 15.1 3.826 .337 7,000 4-3/4 3-3/8 4-3/4 16.0 4.082 .334 7,000 5-1/4 3-5/8

5 15.0 4.408 .296 7,000 5-3/4 4-1/4 5 18.0 4.276 .362 9,000 5-3/4 4-1/8

5-3/8 19.5 4.669 .353 10,000 6 4-1/4 5-1/2 17.0 4.892 .304 9,000 6-1/8 4-3/4 5-1/2 20.0 4.778 .361 11,000 6-1/8 4-5/8 5-1/2 23.0 4.670 .415 13,000 6-1/8 4-1/2 5-1/2 26.0 4.548 .476 16,000 6-1/8 4 5-3/4 18.0 5.126 .312 11,000 6-7/8 4-7/8

6 20.0 5.352 .324 12,000 7 5-1/8 6 23.0 5.240 .380 14,000 7 5-1/8

6-1/4 20.0 5.626 .312 12,000 7 5-1/5 6-3/8 24.0 5.625 .375 16,000 7 5-1/8 6-3/8 28.0 5.499 .438 20,000 7 5 6-5/8 24.0 5.921 .352 16,000 7-3/8 5-5/8 6-5/8 28.0 5.791 .417 20,000 7-3/8 5-5/8 6-3/4 35.0 5.710 .520 25,000 7-1/2 5-5/8

7 26.0 6.276 .362 18,000 7-7/8 6-1/8 7 29.0 6.184 .408 21,000 7-7/8 6 7 32.0 6.094 .453 23,000 7-7/8 5-7/8

7-3/8 29.0 6.625 .375 20,000 7-7/8 6-1/2 7-5/8 26.4 6.969 .328 20,000 8-5/8 6-1/8 7-5/8 29.7 6.875 .375 23,000 8-5/8 6-3/4 7-5/8 33.7 6.765 .430 27,000 8-5/8 6-1/2 7-5/8 39.0 6.625 .500 32,000 8-5/8 6-1/2 7-5/8 45.3 6.435 .595 39,000 8-1/2 6-1/4

8 31.0 7.25 .375 24,000 8-1/2 7-1/8 8-1/8 32.0 7.385 .370 24,000 8-5/8 7-1/8 8-1/8 32.5 7.375 .375 25,000 8-5/8 7-1/8 8-1/8 35.5 7.285 .420 30,000 8-5/8 7 8-1/8 39.5 7.185 .470 35,000 8-5/8 6-7/8

8-7/16 35.5 7.626 30,000 9-1/2 6-1/2 8-5/8 36.0 7.825 .400 30,000 9-5/8 7-3/4 8-5/8 40.0 7.725 .450 35,000 9-5/8 7-3/8 8-5/8 44.0 7.625 .500 40,000 9-5/8 6-1/2

9 40.0 8.150 .425 35,000 9-7/8 8 9-3/16 31.0 8.532 .326 35,000 10 8-1/4 9-5/16 38.0 8.535 .389 35,000 10 8-1/4 9-1/2 47.0 8.537 .483 48,000 10 8-3/8 9-5/8 40.0 8.835 .395 40,000 10-1/2 8-1/2 9-5/8 43.5 8.755 .435 45,000 10-1/2 8-3/8 9-5/8 47.0 8.681 .472 50,000 10-1/2 8-3/8 9-5/8 53.5 8.535 .545 60,000 10-1/2 8-1/8

10-3/4 45.5 9.950 .400 50,000 11-3/4 9-3/4 10-3/4 51.0 9.850 .450 60,000 11-3/4 9-1/2 10-3/4 55.0 9.760 .495 65,000 11-3/4 9-3/8 11-3/4 54.0 10.880 .435 65,000 12-3/4 10-1/2 11-3/4 60.0 10.772 .498 80,000 12-3/4 10-3/8 13-3/8 72.0 12.347 .514 110,000 14-3/8 11-3/4

16 109.0 14.688 .656 150,000 17-1/2 14-1/2

5-15

SECTION 5 - WASHOVER SAFETY JOINT

WASHOVER SAFETY JOINT (WASHOVER EQUIPMENT) GENERAL DESCRIPTION The Gotco Washover Safety Joint is manufactured to provide safe and easy release and makeup whenever disengagement from the washover string becomes necessary. This dependable, field-tough tool is designed to transmit torque in either direction when placed in the washover string. CONSTRUCTION The Gotco Washover Safety Joint consists of a pin section, a box section, and a friction ring. The internal connection of the safety joint is a coarse acme thread used to facilitate easy pack-off and re-engagement. A knurled release ring between the box and pin sections maintains torsional integrity until back-off procedure is initiated. An O-ring seal contains pressure while the safety joint is made up. ASSEMBLY To assemble, install the safety joint in the drill string and make up the service connection to a torque of approximately 60% to 75% of the string connections. In washover strings, the Gotco Safety Joint should be located between the drill pipe and the washover pipe. Gotco thread up and a washover pipe pin thread down. OPERATION To disengage the Gotco Safety Joint while downhole, place pipe in tension and apply left hand torque. Hold torque while slowly lowering pipe until safety joint breaks. Continue to unscrew safety joint to the left. To re-engage the Gotco Safety Joint, lower pipe until pin

section of safety joint lands on box section. Apply one point of weight. Rotate to the left one or two turns. Then rotate to the right until torque builds up, indicating safety joint is made up. ORDERING INSTRUCTIONS When Ordering Please Specify: 1) Name and part number of assembly 2) Connections 3) O.D. and I.D., if not standard.

PIPE SIZE 3-1/2 3-3/4 4 4-1/2 4-3/4 5 5-3/8 5-1/2

COMPLETE ASSEMBLY PART# WSJ-350 WSJ-375 WSJ-400 WSJ-450 WSJ-475 WSJ-500 WSJ-537 WSJ-550

PIPE SIZE 5-3/4 6 6-1/4 6-3/8 6-5/8 6-3/4 7 7-3/8 COMPLETE ASSEMBLY PART# WSJ-575 WSJ-600 WSJ-625 WSJ-637 WSJ-662 WSJ-675 WSJ-700 WSJ-737

PIPE SIZE 7-5/8 8 8-1/8 8-5/8 9 9-3/16 9-5/16 9-1/2 COMPLETE ASSEMBLY PART# WSJ-762 WSJ-800 WSJ-812 WSJ-862 WSJ-900 WSJ-918 WSJ-931 WSJ-950

PIPE SIZE 9-5/8 10-3/4 11-3/4 13-3/8 16 COMPLETE ASSEMBLY PART# WSJ-962 WSJ-1075 WSJ-1175 WSJ-1337 WSJ-1600

5-16

SECTION 5 - LIFT PLUGS

WASHOVER EQUIPMENT LIFT PLUG GENERAL DESCRIPTION Gotco Lift Plugs are designed to provide an economical method of handling washover strings. They are available in all thread types and sizes, have sufficient shoulder diameter to support handling the washover string, and can be ordered with or without lifting bail.

ELEVATOR LIFT SUBS Gotco Elevator Lift Subs are used to handle the washover string and have an upper shoulder as well as reduced neck for securing in the elevator. ORDERING INSTRUCTIONS When Ordering Please Specify: 1) Lower pin connection (washover pipe O.D. and

weight) 2) With or without lifting bail 3) Length, if not standard

GOTCO LIFT PLUGS WASHPIPE 4-1/2 4-3/4 5 5-1/2 5-3/4 6 6-5/8 7 PLUG (PLAIN) LENGTH 6 6 6 6 6 6 6 6 PLUG (WITH BAIL) LENGTH 12 12-1/2 13 13-1/2 13-3/4 14 14-1/2 14-13/16 (PLAIN) PART#

XREF# LP-44 16305

LP-46 16306

LP-5 16307

LP-54 16308

LP-56 16309

LP-6 16310

LP-65 16311

LP-7 16312

(WITH BAIL) PART# XREF#

LPB-44 16305

LPB-46 16306

LPB-5 16307

LPB-54 16308

LPB-56 16309

LPB-6 16310

LPB-65 16311

LPB-7 16312

O.D. SHOULDER GOTCO F.J.W.P. TYPE CONNECTION

5

5-3/8

5-9/16

6-1/8

6-1/2

6-5/8

7-7/16

8 MAXIMUM I.D. 3-7/8 4 4 4-5/8 4-7/8 5-1/8 5-5/8 6

GOTCO LIFT PLUGS WASHPIPE SIZE 7-5/8 8-1/8 8-5/8 9 9-5/8 10-3/4 11-3/4 13-3/8 PLUG (PLAIN) LENGTH 6 6 7 7 7 7 7 PLUG (WITH BAIL) LENGTH 17 18 19 19-1/2 20 21 21 (PLAIN) PART#

XREF# LP-75 16313

LP-81 16314

LP-85 16315

LP-9 16316

LP-95 16317

LP-106 16318

LP-116 49672

LP-133 46288

(WITH BAIL) PART# XREF#

LPB-75 16313

LPB-81 16314

LPB-85 16315

LPB-9 16316

LPB-95 16317

LPB-106 16318

LPB-116 49672

LPB-133 46288

O.D. SHOULDER GOTCO F.J.W.P. TYPE CONNECTION

8-5/8

9-3/32

9-5/8

10

10-5/8

11-3/4

12-3/4

MAXIMUM I.D. 6-5/8 7-1/8 7-5/8 8 8-5/8 9-5/8

5-17

SECTION 5 - DRIVE SUBS

DRIVE SUBS (WASHOVER EQUIPMENT) GENERAL DESCRIPTION Gotco Drive Subs provide the crossover connection between the drill pipe string and the washover string. Each is machined from high-grade alloy steel and heat treated to provide maximum strength and durability. CONSTRUCTIONS Drive subs are provided with a box connection up, cut to customer specifications, for makeup with the fishing string. A pin connection down is also cut to customer specification and will match the washover string connections. A fishing neck is provided for ease of handling. A long type drive sub with extra long fishing neck is also available. ORDERING INSTRUCTIONS When Ordering Please Specify: 1) Top (box) connection 2) Lower pin connection (washover pipe, O.D. and

weight) 3) Length, if not standard

Drive Sub

GOTCO DRIVE SUBS SIZE WASHPIPE 4-1/2 4-3/4 5 5-1/2 5-3/4 6 6-5/8 7 PART#

XREF# DS-44 16330

DS-46 16331

DS-5 16332

DS-54 16333

DS-56 16334

DS-6 16335

DS-65 16336

DS-7 16337

SHORT TYPE LENGTH 16" 16" 16" 16" 18" 18" 18" 19" LONG TYPE LENGTH 46" 46" 46" 46" 46" 46" 46" 48"

GOTCO DRIVE SUBS (CONTINUED)

SIZE WASHPIPE 7-5/8 8-1/8 8-5/8 9 9-5/8 10-3/4 11-3/4 13-3/8 PART#

XREF# DS-75 16338

DS-81 16339

DS-85 16340

DS-9 16341

DS-95 16342

DS-106 16343

DS-116 49673

DS-133 49674

SHORT TYPE LENGTH 19" 19" 20" 20" 20" 20" 20" LONG TYPE LENGTH 48" 48" 50" 50" 50" 54"

5-18

SECTION 5 - ROTARY SHOES

GENERAL DESCRIPTION Gotco Rotary Shoes are manufactured from a specially heat-treated alloy to provide the ultimate in toughness and durability. They are used to cut a clearance between the fish and the wall of the well bore. Each shoe is designed to fit a particular downhole need and is run on the bottom of the washover string. Shoe design is dictated by whether it cuts on the bottom, OD, ID, or any combination of these. When hole sizes permit, additional clearances can be cut by using side ribs to enable greater circulation.

The tooth-type shoe is utilized when the bulk of the work entails removing formation to free a drill string and also used to washover stuck drill collars, drill pipe, and tubing whenever the fish does not require milling. The burning-type shoe dressed with Gotcoloy sintered tungsten carbide cuts blades from stabilizers, mills subs to a smaller diameter for overshot catch, mills out a collapsed section of pipe, mills cutters off of roller-type reamers, and breaks up junk lodged in the bottom of the hole.

Type A Shoe

Type A rotary shoe is a drag type shoe used to cut soft formations and only cuts on the bottom.

Type B Shoe

Type B rotary shoe is used inside casings to washover on a fish without damaging the casing. It cuts on the bottom only.

Type C Shoe

Type C rotary shoe is used inside casing and cuts on the bottom only. It is designed not to damage the casing or the fish.

Type D Shoe

Type D rotary shoe is designed to cut formation only. It only cuts on the O.D. and bottom.

5-19


Type E Shoe

Type E rotary shoe is designed to use inside casing and to cut metal on a fish. It cuts on the I.D. and bottom.

Type G Shoe

Type F rotary shoe is designed to use inside casing and to cut soft formations as it only cuts on the bottom.

Type F Shoe

Type G rotary shoe is designed for use in an open hole and is used to cut formations, cement and metal. It cuts on the O.D., I.D and bottom.

Type M Shoe

Type M rotary shoe is designed for use in an open hole to cut formations, cement and metal where clearances inside the hole are limited. It cuts on the O.D. and bottom.

Type N Shoe

Type N rotary shoe is designed for use inside casing to dress and size the fish. It cuts on the I.D. and bottom.

5-20


Type P Shoe

Type P rotary shoe is designed to cut formations, metal and cement. It cuts on the O.D., I.D. and bottom.

Type T rotary shoe is designed for use in an open hole to cut metal, cement and formation. It cuts on the O.D., I.D. and bottom.

Type T Shoe

Type S rotary shoe is designed to cut metal in the fish without damage to the casing. It cuts on the I.D. and bottom.

Type S Shoe

Type R rotary shoe is designed for use in an open hole to cut formation, cement and metal. It cuts on the O.D. and bottom.

Type R Shoe

Type Z Shoe

Type Z rotary shoe is designed for use inside casing to cut metal on the fish. It cuts on the I.D. and bottom.

5-21


ORDERING INSTRUCTIONS

When Ordering Please Specify: 1) Pipe O.D. and weight 2) Shoe type (See illustrations & descriptions.) 3) Dressed O.D. and/or I.D. as required in shoe

description Special Notes: 1) Unless otherwise specified, Shoes will be

furnished with same I.D. as Washover String. 2) Any specified I.D. larger than standard can be

furnished with no additional charge. 3) For Hard-Faced Teeth only (no side ribs) use

Plain Teeth as base, plus additional cost based on per diameter inch of Teeth O.D. required.

4) For Hard-Faced Outside Ribs use Hard-Faced Teeth as base, plus additional cost per diameter inch of Rib O.D. required.

5) For Bodies longer than 16 inches, additional cost for each additional inch of length ordered.

6) All Rotary Shoes listed above are available also dressed with Crushed Tungsten Carbide hard facing. s available on request.

7) For Oversized Shoes, additional costs per 1/4 inch or portion thereof for oversizing on O.D. or undersizing of I.D.

(See Illustrations for Rotary Shoe Types and Usage.)

GOTCO ROTARY SHOE BLANKS NO. OF TEETH 6 6 6 6 6 6 CONNECTION - GOTCO FJWP TYPE 4 FJWP 4-1/2 FJWP 4-3/4 FJWP 5 FJWP 5-1/2 FJWP 5-3/4 FJWP STD O.D. OF BODY-INCH 4 4-1/2 4-3/4 5 5-1/2 5-3/4 MIN I.D. OF BODY-INCH 3-1/4 3-3/4 4-1/16 4-3/16 4-5/8 5 LENGTH - INCH 16 16 16 16 16 16 WEIGHT - POUNDS 18 20 28 23 30 26 TOOTH TYPE - PART# RST-40 RST-44 RST-46 RST-50 RST-54 RST-56 WAVY OR FLAT BOTTOM - PART# RSW-40 RSW-44 RSW-46 RSW-50 RSW-54 RSW-56

GOTCO ROTARY SHOE BLANKS (CONTINUED)

NO. OF TEETH 6 6 6 8 8 8 CONNECTION - GOTCO FJWP TYPE 6 FJWP 6-5/8 FJWP 7 FJWP 7-5/8 FJWP 8-1/8 FJWP 8-5/8 FJWP STD O.D. OF BODY-INCH 6 6-5/8 7 7-5/8 8-1/8 8-5/8 MIN I.D. OF BODY-INCH 5-3/16 5-11/16 5-13/16 6-5/8 7-1/8 7-1/2 LENGTH - INCH 16 16 16 16 16 16 WEIGHT - POUNDS 28 41 47 47 50 60 TOOTH TYPE - PART# RST-60 RST-65 RST-70 RST-75 RST-81 RST-85 WAVY OR FLAT BOTTOM - PART# RSW-60 RSW-65 RSW-70 RSW-75 RSW-81 RSW-85

GOTCO ROTARY SHOE BLANKS (CONTINUED)

NO. OF TEETH 10 10 10 10 10 10 CONNECTION - GOTCO FJWP TYPE 9 FJWP 9-5/8 FJWP 10-3/4 FJWP 11-3/4 FJWP 13-3/8 FJWP 16 FJWP STD O.D. OF BODY-INCH 9 9-5/8 10-3/4 11-3/4 13-2/3 16 MIN I.D. OF BODY-INCH 7-13/16 8-1/2 9-3/4 10-3/4 LENGTH - INCH 16 16 16 16 16 16 WEIGHT - POUNDS 56 68 68 160 190 190 TOOTH TYPE - PART# RST-90 RST-95 RST-106 RST-116 RST-136 RST-160 WAVY OR FLAT BOTTOM - PART# RSW-90 RSW-95 RSW-106 RSW-116 RSW-136 RSW-160

5-22

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