4 Novel Drilling Systems

Before discussing the various novel drilling techniques, it is important to understand the characteristics of novel drilling systems and the role they have played in the history of oil well drilling. Novel systems are identified by the following criteria 1. Novel drilling systems use techniques deviating significandy from conventional rotary drilling systems that utilize present state-of-the-art drill rigs, drill pipe, and rock bits. 2. Implementation of novel drilling systems requires...

35 Advanced Management Techniques

During the last few years, the increase in number and capability of computer systems has encouraged engineers in all fields of activity to consider using these machines to assist in the management of technical operations. Computer systems are finding increased use in drilling operations including the following Technical calculations. Programs are written that deal with problems formulated in terms of physical parameters, and produce outputs that describe the behavior of the specified system....

Aovanced 3it

AdvancedDeejj Gas Drilling System . This advanced drilling system would use coiled tubing to reduce trip time in deep gas wells from 15-20 hours to 3 to 5 hours. It would utilize advanced high-power downhole motors equipped with diamond bearings and advanced rotor stator systems to deliver 2 to 3 times more power to the drill bit. Advanced synthetic drill bits utilizing the latest thermally-stable-diamond cutters (TSD) could be used to drill 2 to 4 times faster than conventional...

Section

Atlantic Richfield Abrasive Jet Drill 4-4 Figure 4-3. Replaceable Abrasive Jet Nozzles 4-4 Figure 4-4. Abrasive Jet Core Bit 4-5 Figure 4-5. Gulf Abrasive Jet Bit 4-5 Figure 4-6. Hydronautics Cavitating Nozzles 4-6 Figure 4-7. Mobil Turbine-Powered Cavitation Drill 4-7 Figure 4-8. Mobil Cavitation Focusing System 4-8 Figure 4-9. Cavitation Focusing Nozzle 4-8 Figure 4-10. Bottom-Hole Sweep Pattern 4-S Figure 4-12. Effect of Nozzle Standoff on Caviration ' ' v 4-10 Figure 4-13....

104

PEI (Bauxn) patented the water jet assisted rocket drill shown in Figure 4-35 in 1978. High-pressure water jets operating at pressures up to 1,400,000 psi are pulsed through nozzles at the rate of one pulse per second. The water jets assist in removing the rock which is thermally degraded by the rocket exhaust flames. MBB (Baum and Munding) patented the thermal shocking rocket drills shown in Figure 4-36. As these drills are rotated or oscillated, the rock is thermally shocked as it is...

Rns

Soviet Explosive Capsule Drill (Ostrovskii, I960). Figure 4-15. Soviet Explosive Capsule (Raynal, 1960) In 1962, Jersey Production Research (Robinson) patented the explosive drill shown in Figure 4-16. This drill uses two different types of capsules jet charges and gauge charges. First, a jet charge is used to create a new pilot hole, and then a gauge charge is used to enlarge the pilot hole to the desired well bo re diameter. As with the Soviet system, the capsules are circulated...

Mechanicallyinduced Stress

A., 1971 A Method and Apparatus For Cavitation* Drilling Utilizing Periodically Rediiced Hydrostatic Pressure, U. S. Patent No. 3,603,410, September 7. Angona, F. A., 197IB Cavitation Erosion of Aluminum At Elevated Pressure, Journai Acoustic Society America, p. 277. Angona, F. A., 1970 Wellbore Drilling With Shock Waves, U. S. Patent No. 3,506,076, April 14. Angona, F. A., 1970 Cavitational Drilling Utilizing An Acoustic Generator and An Acoustic Concentrator, U. S. Patent No....

36 References

Gill, C.W., Martin, J.L., and Mounder, T.E., 1985 Matrix Body PDC Bits Prove Most Cost Effective in the Powder River Basin, SPE IADC 13462, Drilling Conference held in New Orleans, Louisiana, March 6-8. 2. Eaton, B.A., Bower, Jr., A.B., Martis, J.A., 1975 Manufactured Diamond Cutters Used in Drilling Bits, Journal of Petroleum Technology, May, pp. 543-551. 3. Warren, T.M. and Armagost, W.K., 1988 Laboratory Drilling Performance of PDC Bits, SPE Drilling Engr., June, pp. 125-136. 4. Sneddon,...

3 3 Downhole Motors

Downhole motors can drill many formations much faster than rotary rigs because they can rotate drill bits at speeds of 500 to 2000 rpm compared to 50 to 150 rpm for rotary drills. Downhole motors are not new, the first motor patents being granted in the 1880s, and turbine motors being used in the Soviet Union in the 1930s. The Soviets developed and used motors at that time because of the poor quality of their oil-field tubulars. Today, downhole motors are used around the world to perform a...

1

Proposed Exploration Procedure Improving depth capability was an important enhancement Amoco research added to slim-hole drilling technology. Amoco's deepest SHADS rig well was drilled to approximately 10,000 ft., three times deeper than any other slim-hole. The SHADS rig is capable of drilling at rotary speeds in excess of 1,000 rpm a capability that overcomes decreased bit weight capabilities inherent with slim-hole drilling rigs. Amoco Research conducted extensive studies on...

31 Advances In Drill Bit Technology

Rock bits cut rock by three different mechanisms as shown in Figure 3-1. Diamond Compact Diamond Bit Roller Can* Bit Figure 3-1. Rock Bit Cutting Mechanism (Gill et al., 1985)1 Roller bits utilize teeth which are pushed into and crush the rock. Drag bits (PDC and TSP) drag sideways across the rock face and cut the rock by a shear mechanism which can generate large cuttings. Small natural diamonds use a grinding action to pulverize the rock into very fine particles. The shearing action of drag...

Info

Wireline Coring Assembly Figure 3-51. Wireline Coring Assembly Amoco hoped to impact drilling techniques and economics, and to influence current exploration methods in more hostile environments. The spiraling costs of seismic work and drilling operations in dense jungles, harsh Arctic climates, and isolated mountain passes were the main motivation for the SHADS projfccfc Amoco hoped that their slim-hole drilling system would directly influence the way major petroleum companies...

Sumhole

Figure 3-44. Deep Oklahoma Well Casing Program The development of synthetic polycrystalline diamond bits (PDC) and thermally-stable diamond (TSD) bits has greatly enhanced the use of slim-hole drilling because these drag bits contain no bearings and therefore overcome the problem of short bearing life encountered with small diameter roller bits. These PDC and TSD bits are well suited for use in many of the harder rocks encountered in deep gas wells. Industry...

Turbine Section

LANL Geothermal Turbodrill New diamond bearings (Figure 3-43) being used in new, advanced downhole motors have several advantages including 1) long life, 2) low friction, 3) high thrust capabilities and 4) high temperature capabilities. These bearings should significantly increase the use of motors in deep drilling and should lead to the development of advanced, high-power motors that will drill 2 to 3 times faster than current motors. Figure 3-43. Downhole Motor Diamond Thrust...