Allis-Chalmers Energy Inc., Houston, (Amex: ALY) has acquired substantially all the assets of Oil & Gas Rental Services Inc., Morgan City, La., for $291 million in cash and 3.2 million shares valued at approximately $23 each in a deal valued at $364.6 million.

Oil & Gas Rental Services provides rental tools to offshore and onshore E&P companies, including drill-pipe, blow-out preventers, choke manifolds and valves. The company has facilities in Morgan City, La., and Victoria, Texas, and provides equipment worldwide, including in Malaysia, Colombia, Russia, Mexico and Canada.

Allis-Chalmers chairman and chief executive Micki Hidayatallah says, "As we remain focused on balancing our service offerings, these assets will make an important contribution to our rental services for offshore projects and deep land wells, which we expect are less likely to be affected negatively by any potential softening of oil and gas prices."

RBC Capital Markets was financial advisor to Allis-Chalmers and Simmons & Co. International was financial advisor to Oil & Gas Rental Services.

Basic Energy Services Inc., Midland, Texas, (NYSE: BAS) plans to acquire substantially all of the operating assets of Davis Tool Co. Inc., Hobbs, N.M., for approximately $6 million.

Davis provides rental and fishing tool services in eastern New Mexico and will be integrated into Basic's rental and fishing tool division.

Basic Energy Services Inc., Midland, Texas, (NYSE: BAS) plans to acquire Texas-based JetStar Consolidated Holdings Inc. for approximately $120 million in cash and stock.

Basic will pay approximately $43.5 million in Basic shares at approximately $25 each.

JetStar provides pressure-pumping equipment in Texas, Oklahoma and Kansas, and Basic will combine the JetStar operations with its own pressure pumping assets.

Basic Marine Services Inc., a subsidiary of Basic Energy Services Inc., Midland, Texas, (NYSE: BAS) plans to acquire two workover barge rigs from Parker Drilling Offshore USA LLC, a subsidiary of Parker Drilling Co., Houston, (NYSE: PKD) for approximately $20 million.

The rigs operate in the inland waters of Louisiana and Texas and will increase Basic's barge-mounted workover rig fleet to four.

Bronco Drilling Co. Inc., Oklahoma City, (Nasdaq: BRNC), has acquired Eagle Well Service Inc., Liberal, Kan., and related subsidiaries for $2.5 million in cash and approximately $14.9 million in stock and will assume approximately $3 million in debt in a total deal value of approximately $20.4 million.

Eagle Well operates in Oklahoma, Texas, Kansas and New Mexico, and has 31 workover rigs, 24 of which are currently deployed.

Bronco chief executive says Frank Harrison, "We believe the well-services business is a natural complement to ours and an entree into more mid- to late-cycle assets that could provide insulation from cyclicality."

Compagnie Générale de Géophysique (CGG), Paris, (NYSE: GGY) has closed the acquisition of Veritas DGC Inc., Houston, (NYSE: VTS) for US$3.1 billion in cash and stock.

The deal includes US$1.5 billion in cash and 47 million CGG shares (at 2.2501 CGG shares per Veritas share). The deal values Veritas shares at US$75 each.

Veritas provides geophysical information and services to the petroleum industry worldwide. The merged company has a seismic fleet of 20 vessels, including 14 high-capacity 3-D vessels, and land crews operating with equivalent capacity in both hemispheres.

CGG chairman and chief executive Robert Brunck says, "CGG-Veritas will be a leading global seismic company and the only pure-play listed investment opportunity of this scale in the seismic sector. Because of our many complementarities, with all its multidisciplinary and talented personnel, and the strongest asset base in the sector, the future group will constitute an excellent platform to maximize the value of our respective businesses and technologies."

Veritas chairman and CEO Thierry Pilenko says, "Our operations and strategy are very well aligned and I am very excited about the combination of our companies."

After the merger, the CGG board will include both Brunck and Pilenko.

Credit Suisse and Rothschild were financial advisors to CGG. Goldman Sachs was financial advisor to Veritas.

Dalbo Holdings Inc., Vernal, Utah, plans to acquire Farmington, N.M.-based Dawn Trucking Corp. and Wyoming-based BHS Inc. for an undisclosed price.

Dawn Trucking provides frac-tank rental and hauling services in New Mexico and Colorado. BHS provides oilfield equipment rental in Wyoming. Dalbo will add these businesses to its water-based fluid transportation, water-storage tank rental and fluid-disposal services in northeastern Utah and northwestern Colorado.

The company will fund the acquisition with a $155-million senior credit facility.

Energy Exploration Technologies Inc., Calgary, (OTCBB: ENXTF) plans to acquire stress field-detection technology from the company's founder and chief executive George Liszicasz for approximately C$11.8 million in stock.

Liszicasz will receive 10 million preferred shares valued at approximately C$1.18 each.

Flotek Industries Inc., Houston, (Amex: FTK) has acquired Triumph Drilling Tools Inc. from Teal Supply Co., Corpus Christi, Texas, for $31 million.

Triumph provides downhole rental equipment and has an inventory of drilling tools for lease or sublease in Texas, New Mexico, Louisiana, Oklahoma and Arkansas. The company will become part of Flotek's drilling-tools division.

The companies have a combined inventory of more than 20,000 tools, the largest inventory of rental tools in several of its key regional markets.

Flotek chairman and chief executive Jerry D. Dumas says, "We believe the addition of services and under utilized inventory from Flotek's other regions will strengthen and expand Triumph's market presence."

Flotek funded the deal with an amended $56-million senior credit facility from Wells Fargo Commercial Banking.

Morgan Keegan & Co. Inc. was financial advisor to Triumph.

Geodynamic Solutions Inc., a subsidiary of LandWorks Inc., Houston, has acquired Geospatial Training Services LLC, Houston, for an undisclosed price.

Geospatial Training provides geographic information system training courses to geotechnology professionals. The training services classes will now be offered through Geodynamic Solutions.

Great Valley Drilling Co. LLC, the drilling subsidiary of Tri-Valley Corp., Bakersfield, Calif., (Amex: TIV) has acquired a drill pipe-rated drilling rig from Equipment 2000, Fallon, Nev., for an undisclosed price.

Rig owner Gary Borgna will become general manager of Great Valley Drilling.

IHS Inc., Englewood, Colo., (NYSE: IHS) has acquired Geological Data Services Inc., Addison, Texas, for an undisclosed price.

Geological Data provides interpreted subsurface data "formation tops" covering the Permian Basin, Midcontinent and Rockies for more than 640,000 wells. Geological Data will be integrated with IHS' E&P data and software.

Geological Data chief executive Joe Haynes says, "IHS and GDS have a long history of collaboration, and IHS was the only company we felt we could entrust with our data and customers. We began building these interpreted data assets more than 20 years ago-so it was very important to us that they continue to be improved and maintained, and our customers be supported."

Privately held Q Consolidated Oil Well Services LLC has acquired oilfield-service subsidiaries Consolidated Oil Well Services Inc. and CIS-Oklahoma Inc. from parent

Infinity Energy Resources Inc., Denver, (Nasdaq: IFNY) for $52 million in cash.

Infinity will use the proceeds to pay approximately $51 million of senior secured debt.

Infinity chief executive Stanton E. Ross says, "The sale...represents another important step in our previously announced program to enhance shareholder value, and the repayment of our senior indebtedness will allow Infinity to more effectively proceed with the exploitation of our oil and gas resources in the Barnett Shale formation in Texas and in the Rocky Mountain area."

Stallion Oilfield Services Ltd., Houston, has acquired Norton Transport Inc., Palestine, Texas, for an undisclosed price.

Norton has more than 50 trucks and provides heavy-hauling for the oilfield industry. The company will be renamed Stallion Heavy Haulers and expand Stallion's rig-logistics division into the Barnett Shale area of the Fort Worth Basin and strengthen its East Texas business.

WellDynamics Inc., Houston, has acquired the reservoir performance monitoring business of Halliburton, Houston, (NYSE: HAL) for an undisclosed price.

The monitoring business consists of three primary components: fiber-optic systems, the EZ-Gauge capillary tubing systems, and electronic systems.

The acquisition complements the production technology business WellDynamics acquired from The Wood Group and will expand its SmartWell intelligent-completion technology business.

Well Renewal Inc., Tulsa, Okla., (Pink Sheets: WRNW) plans to merge with Energy Solutions Petrochemicals Resources Inc., Houston.

Energy Solutions focuses on production-optimization chemicals.

The deal is expected to close in early January.

Well Renewal Inc., Tulsa, Okla., (Pink Sheets: WRNW) has acquired Oklahoma-based Pro-Formance Oil Field Services LLC for an undisclosed price.

Pro-Formance provides well-servicing, drilling and fluid services in northwestern Oklahoma.